gpp-2.24/0000777000076400001440000000000010123366423005774 5gpp-2.24/doc/0000777000076400001440000000000010123366423006541 5gpp-2.24/doc/gpp.10000644000076400001440000014603410123364565007342 .TH GPP 1 \" -*- nroff -*- .SH NAME GPP \- Generic Preprocessor .SH SYNOPSIS gpp [\-{o|O} \fIoutfile\fP] [\-I\fI/include/path\fP] [\-D\fIname=val\fP ...] [\-z|+z] [\-x] [\-m] [\-C|\-T|\-H|\-X|\-P|\-U ... [\-M ...]] [\-n|+n] [+c\fI\fP \fIstr1\fP \fIstr2\fP] [+s\fI\fP \fIstr1\fP \fIstr2\fP \fIc\fP] [\-c \fIstr1\fP] [\-\-nostdinc] [\-\-nocurinc] [\-\-curdirinclast] [\-\-warninglevel \fIn\fP] [\-\-includemarker \fIstr\fP] [\-\-include \fIfile\fP] [\fIinfile\fP] gpp \-\-help gpp \-\-version .SH DESCRIPTION .P GPP is a general-purpose preprocessor with customizable syntax, suitable for a wide range of preprocessing tasks. Its independence from any programming language makes it much more versatile than cpp, while its syntax is lighter and more flexible than that of m4. .P GPP is targeted at all common preprocessing tasks where cpp is not suitable and where no very sophisticated features are needed. In order to be able to process equally efficiently text files or source code in a variety of languages, the syntax used by GPP is fully customizable. The handling of comments and strings is especially advanced. .P Initially, GPP only understands a minimal set of built-in macros, called \fImeta-macros\fP. These meta-macros allow the definition of \fIuser macros\fP as well as some basic operations forming the core of the preprocessing system, including conditional tests, arithmetic evaluation, wildcard matching (globbing), and syntax specification. All user macro definitions are global -- \fIi.e.\fP, they remain valid until explicitly removed; meta-macros cannot be redefined. With each user macro definition GPP keeps track of the corresponding syntax specification so that a macro can be safely invoked regardless of any subsequent change in operating mode. .P In addition to macros, GPP understands comments and strings, whose syntax and behavior can be widely customized to fit any particular purpose. Internally comments and strings are the same construction, so everything that applies to comments applies to strings as well. .SH OPTIONS .P GPP recognizes the following command-line switches and options. Note that the \-nostdinc, \-nocurinc, \-curdirinclast, \-warninglevel, and \-includemarker options from version 2.1 and earlier are deprecated and should not be used. Use the "long option" variants instead (\-\-nostdinc, \fIetc.\fP). .TP .BI "\-h \-\-help" "" Print a short help message. .TP .BI "\-\-version" "" Print version information. .TP .BI "\-o " "outfile" Specify a file to which all output should be sent (by default, everything is sent to standard output). .TP .BI "\-O " "outfile" Specify a file to which all output should be sent; output is simultanously sent to stdout. .TP .BI "\-I" "/include/path" Specify a path where the \fI#include\fP meta-macro will look for include files if they are not present in the current directory. The default is /usr/include if no \-I option is specified. Multiple \-I options may be specified to look in several directories. .TP .BI "\-D" "name=val" Define the user macro \fIname\fP as equal to \fIval\fP. This is strictly equivalent to using the \fI#define\fP meta-macro, but makes it possible to define macros from the command-line. If \fIval\fP makes references to arguments or other macros, it should conform to the syntax of the mode specified on the command-line. Starting with version 2.1, macro argument naming is allowed on the command-line. The syntax is as follows: \-D\fImacro\fP(\fIarg1\fP,...)=\fIdefinition\fP. The arguments are specified in C-style syntax, without any whitespace, but the definition should still conform to the syntax of the mode specified on the command-line. .TP .BI "+z" "" Set text mode to Unix mode (LF terminator). Any CR character in the input is systematically discarded. This is the default under Unix systems. .TP .BI "\-z" "" Set text mode to DOS mode (CR-LF terminator). In this mode all CR characters are removed from the input, and all output LF characters are converted to CR-LF. This is the default if GPP is compiled with the WIN_NT option. .TP .BI "\-x" "" Enable the use of the \fI#exec\fP meta-macro. Since \fI#exec\fP includes the output of an arbitrary shell command line, it may cause a potential security threat, and is thus disabled unless this option is specified. .TP .BI "\-m" "" Enable automatic mode switching to the cpp compatibility mode if the name of an included file ends in `.h' or `.c'. This makes it possible to include C header files with only minor modifications. .TP .BI "\-n" "" Prevent newline or whitespace characters from being removed from the input when they occur as the end of a macro call or of a comment. By default, when a newline or whitespace character forms the end of a macro or a comment it is parsed as part of the macro call or comment and therefore removed from output. Use the \-n option to keep the last character in the input stream if it was whitespace or a newline. This is activated in cpp and Prolog modes. .TP .BI "+n" "" The opposite of \-n. This is the default in all modes except cpp and Prolog. Note that +n must be placed \fIafter\fP \-C or \-P in order to have any effect. .TP .BI "\-U " "arg1 ... arg9" User-defined mode. The nine following command-line arguments are taken to be respectively the macro start sequence, the macro end sequence for a call without arguments, the argument start sequence, the argument separator, the argument end sequence, the list of characters to stack for argument balancing, the list of characters to unstack, the string to be used for referring to an argument by number, and finally the quote character (if there is none an empty string should be provided). These settings apply both to user macros and to meta-macros, unless the \-M option is used to define other settings for meta-macros. See the section on syntax specification for more details. .TP .BI "\-M " "arg1 ... arg7" User-defined mode specifications for meta-macros. This option can only be used together with \-M. The seven following command-line arguments are taken to be respectively the macro start sequence, the macro end sequence for a call without arguments, the argument start sequence, the argument separator, the argument end sequence, the list of characters to stack for argument balancing, and the list of characters to unstack. See below for more details. .TP .BI "(default mode)" "" The default mode is a vaguely cpp-like mode, but it does not handle comments, and presents various incompatibilities with cpp. Typical meta-macros and user macros look like this: #define x y macro(arg,...) This mode is equivalent to -U "" "" "(" "," ")" "(" ")" "#" "\\\\" -M "#" "\\n" " " " " "\\n" "(" ")" .TP .BI "\-C" "" cpp compatibility mode. This is the mode where GPP's behavior is the closest to that of cpp. Unlike in the default mode, meta-macro expansion occurs only at the beginning of lines, and C comments and strings are understood. This mode is equivalent to -n -U "" "" "(" "," ")" "(" ")" "#" "" -M "\\n#\\w" "\\n" " " " " "\\n" "" "" +c "/*" "*/" +c "//" "\\n" +c "\\\\\\n" "" +s "\\"" "\\"" "\\\\" +s "'" "'" "\\\\" .TP .BI "\-T" "" TeX-like mode. In this mode, typical meta-macros and user macros look like this: \\define{x}{y} \\macro{arg}{...} No comments are understood. This mode is equivalent to -U "\\\\" "" "{" "}{" "}" "{" "}" "#" "@" .TP .BI "\-H" "" HTML-like mode. In this mode, typical meta-macros and user macros look like this: <#define x|y> <#macro arg|...> No comments are understood. This mode is equivalent to -U "<#" ">" "\\B" "|" ">" "<" ">" "#" "\\\\" .TP .BI "\-X" "" XHTML-like mode. In this mode, typical meta-macros and user macros look like this: <#define x|y/> <#macro arg|.../> No comments are understood. This mode is equivalent to -U "<#" "/>" "\\B" "|" "/>" "<" ">" "#" "\\\\" .TP .BI "\-P" "" Prolog-compatible cpp-like mode. This mode differs from the cpp compatibility mode by its handling of comments, and is equivalent to -n -U "" "" "(" "," ")" "(" ")" "#" "" -M "\\n#\\w" "\\n" " " " " "\\n" "" "" +ccss "\\!o/*" "*/" +ccss "%" "\\n" +ccii "\\\\\\n" "" +s "\\"" "\\"" "" +s "\\!#'" "'" "" .TP .BI "+c" " str1 str2" Specify comments. Any unquoted occurrence of \fIstr1\fP will be interpreted as the beginning of a comment. All input up to the first following occurrence of \fIstr2\fP will be discarded. This option may be used multiple times to specify different types of comment delimiters. The optional parameter \fI\fP can be specified to alter the behavior of the comment and, \fIe.g.\fP, turn it into a string or make it ignored under certain circumstances, see below. .TP .BI "\-c " "str1" Un-specify comments or strings. The comment/string specification whose start sequence is \fIstr1\fP is removed. This is useful to alter the built-in comment specifications of a standard mode -- \fIe.g.\fP, the cpp compatibility mode. .TP .BI "+s" " str1 str2 c" Specify strings. Any unquoted occurrence of \fIstr1\fP will be interpreted as the beginning of a string. All input up to the first following occurrence of \fIstr2\fP will be output as is without any evaluation. The delimiters themselves are output. If \fIc\fP is non-empty, its first character is used as a \fIstring-quote character\fP -- \fIi.e.\fP, a character whose presence immediately before an occurrence of \fIstr2\fP prevents it from terminating the string. The optional parameter \fI\fP can be specified to alter the behavior of the string and, \fIe.g.\fP, turn it into a comment, enable macro evaluation inside the string, or make the string specification ignored under certain circumstances. See below. .TP .BI "\-s " "str1" Un-specify comments or strings. Identical to \-c. .TP .BI "\-\-include " "file" Process \fIfile\fP before \fIinfile\fP .TP .BI "\-\-nostdinc" "" Do not look for include files in the standard directory /usr/include. .TP .BI "\-\-nocurinc" "" Do not look for include files in the current directory. .TP .BI "\-\-curdirinclast" "" Look for include files in the current directory \fIafter\fP the directories specified by \fI\-I\fP rather than before them. .TP .BI "\-\-warninglevel " "n" Set warning level to \fIn\fP (0, 1 or 2). Default is 2 (most verbose). .TP .BI "\-\-includemarker " "str" keep track of \fI#include\fP directives by inserting a marker in the output stream. The format of the marker is determined by \fIstr\fP, which must contain three occurrences of the character \fI%\fP (or equivalently \fI?\fP). The first occurrence is replaced with the line number, the second with the file name, and the third with 1, 2 or blank. When this option is specified in default, cpp or Prolog mode, GPP does its best to ensure that line numbers are the same in the output as in the input by inserting blank lines in the place of definitions or comments. .TP .BI "infile" "" Specify an input file from which GPP reads its input. If no input file is specified, input is read from standard input. .SH SYNTAX SPECIFICATION .P The syntax of a macro call is as follows: it must start with a sequence of characters matching the \fImacro start sequence\fP as specified in the current mode, followed immediately by the name of the macro, which must be a valid \fIidentifier\fP -- \fIi.e.\fP, a sequence of letters, digits, or underscores ("_"). The macro name must be followed by a \fIshort macro end sequence\fP if the macro has no arguments, or by a sequence of arguments initiated by an \fIargument start sequence\fP. The various arguments are then separated by an \fIargument separator\fP, and the macro ends with a \fIlong macro end sequence\fP. .P In all cases, the parameters of the current context -- \fIi.e.\fP, the arguments passed to the body being evaluated -- can be referred to by using an \fIargument reference sequence\fP followed by a digit between 1 and 9. Alternatively, macro parameters may be named (see below). Furthermore, to avoid interference between the GPP syntax and the contents of the input file, a \fIquote character\fP is provided. The quote character can be used to prevent the interpretation of a macro call, comment, or string as anything but plain text. The quote character "protects" the following character, and always gets removed during evaluation. Two consecutive quote characters evaluate as a single quote character. .P Finally, to facilitate proper argument delimitation, certain characters can be "stacked" when they occur in a macro argument, so that the argument separator or macro end sequence are not parsed if the argument body is not balanced. This allows nesting macro calls without using quotes. If an improperly balanced argument is needed, quote characters should be added in front of some stacked characters to make it balanced. .P The macro construction sequences described above can be different for meta-macros and for user macros: this is the case in cpp mode, for example. Note that, since meta-macros can only have up to two arguments, the delimitation rules for the second argument are somewhat sloppier, and unquoted argument separator sequences are allowed in the second argument of a meta-macro. .P Unless one of the standard operating modes is selected, the above syntax sequences can be specified either on the command-line, using the \-M and \-U options respectively for meta-macros and user macros, or inside an input file via the \fI#mode meta\fP and \fI#mode user\fP meta-macro calls. In both cases the mode description consists of nine parameters for user macro specifications, namely the macro start sequence, the short macro end sequence, the argument start sequence, the argument separator, the long macro end sequence, the string listing characters to stack, the string listing characters to unstack, the argument reference sequence, and finally the quote character. As explained below, these sequences should be supplied using the syntax of C strings; they must start with a non-alphanumeric character, and in the first five strings special matching sequences can be used (see below). If the argument corresponding to the quote character is the empty string, that argument's functionality is disabled. For meta-macro specifications there are only seven parameters, as the argument reference sequence and quote character are shared with the user macro syntax. .P The structure of a comment/string is as follows: it must start with a sequence of characters matching the given \fIcomment/string start sequence\fP, and always ends at the first occurrence of the \fIcomment/string end sequence\fP, unless it is preceded by an odd number of occurrences of the \fIstring-quote character\fP (if such a character has been specified). In certain cases comment/strings can be specified to enable macro evaluation inside the comment/string; in that case, if a quote character has been defined for macros it can be used as well to prevent the comment/string from ending, with the difference that the macro quote character is always removed from output whereas the string-quote character is always output. Also note that under certain circumstances a comment/string specification can be \fIdisabled\fP, in which case the comment/string start sequence is simply ignored. Finally, it is possible to specify a \fIstring warning character\fP whose presence inside a comment/string will cause GPP to output a warning (this is useful to locate unterminated strings in cpp mode). Note that input files are not allowed to contain unterminated comments/strings. .P A comment/string specification can be declared from within the input file using the \fI#mode comment\fP meta-macro call (or equivalently \fI#mode string\fP), in which case the number of C strings to be given as arguments to describe the comment/string can be anywhere between two and four: the first two arguments (mandatory) are the start sequence and the end sequence, and can make use of the special matching sequences (see below). They may not start with alphanumeric characters. The first character of the third argument, if there is one, is used as the string-quote character (use an empty string to disable the functionality), and the first character of the fourth argument, if there is one, is used as the string-warning character. A specification may also be given from the command-line, in which case there must be two arguments if using the +c option and three if using the +s option. .P The behavior of a comment/string is specified by a three-character modifier string, which may be passed as an optional argument either to the +c/+s command-line options or to the \fI#mode comment\fP/\fI#mode string\fP meta-macros. If no modifier string is specified, the default value is "ccc" for comments and "sss" for strings. The first character corresponds to the behavior inside meta-macro calls (including user-macro definitions since these come inside a \fI#define\fP meta-macro call), the second character corresponds to the behavior inside user-macro parameters, and the third character corresponds to the behavior outside of any macro call. Each of these characters can take the following values: .TP .BI "i" "" disable the comment/string specification. .TP .BI "c" "" comment (neither evaluated nor output). .TP .BI "s" "" string (the string and its delimiter sequences are output as-is). .TP .BI "q" "" quoted string (the string is output as-is, without the delimiter sequences). .TP .BI "C" "" evaluated comment (macros are evaluated, but output is discarded). .TP .BI "S" "" evaluated string (macros are evaluated, delimiters are output). .TP .BI "Q" "" evaluated quoted string (macros are evaluated, delimiters are not output). .P Important note: any occurrence of a comment/string start sequence inside another comment/string is always ignored, even if macro evaluation is enabled. In other words, comments/strings cannot be nested. In particular, the `Q' modifier can be a convenient way of defining a syntax for temporarily disabling all comment and string specifications. .P Syntax specification strings should always be provided as C strings, whether they are given as arguments to a \fI#mode\fP meta-macro call or on the command-line of a Unix shell. If command-line arguments are given via another method than a standard Unix shell, then the shell behavior must be emulated -- \fIi.e.\fP, the surrounding "" quotes should be removed, all occurrences of `\\\\' should be replaced by a single backslash, and similarly `\\"' should be replaced by `"'. Sequences like `\\n' are recognized by GPP and should be left as is. .P Special sequences matching certain subsets of the character set can be used. They are of the form `\\\fIx\fP', where \fIx\fP is one of: .TP .BI "b" "" matches any sequence of one or more spaces or tab characters (`\\b' is identical to `\ '). .TP .BI "w" "" matches any sequence of zero or more spaces or tab characters. .TP .BI "B" "" matches any sequence of one or more spaces, tabs or newline characters. .TP .BI "W" "" matches any sequence of zero or more spaces, tabs or newline characters. .TP .BI "a" "" an alphabetic character (`a' to `z' and `A' to `Z'). .TP .BI "A" "" an alphabetic character, or a space, tab or newline. .TP .BI "#" "" a digit (`0' to `9'). .TP .BI "i" "" an identifier character. The set of matched characters is customizable using the \fI#mode charset id\fP command. The default setting matches alphanumeric characters and underscores (`a' to `z', `A' to `Z', `0' to `9' and `_'). .TP .BI "t" "" a tab character. .TP .BI "n" "" a newline character. .TP .BI "o" "" an operator character. The set of matched characters is customizable using the \fI#mode charset op\fP command. The default setting matches all characters in "+-*/\\^<>=`~:.?@#&!%|", except in Prolog mode where `!', `%' and `|' are not matched. .TP .BI "O" "" an operator character or a parenthesis character. The set of additional matched characters in comparison with `\\o' is customizable using the \fI#mode charset par\fP command. The default setting is to have the characters in "()[]{}" as parentheses. .P Moreover, all of these matching subsets except `\\w' and `\\W' can be negated by inserting a `!' -- \fIi.e.\fP, by writing `\\!\fIx\fP' instead of `\\\fIx\fP'. .P Note an important distinctive feature of \fIstart sequences\fP: when the first character of a macro or comment/string start sequence is '\ ' or one of the above special sequences, it is not taken to be part of the sequence itself but is used instead as a context check: for example a start sequence beginning with '\\n' matches only at the beginning of a line, but the matching newline character is not taken to be part of the sequence. Similarly a start sequence beginning with '\ ' matches only if some whitespace is present, but the matching whitespace is not considered to be part of the start sequence and is therefore sent to output. If a context check is performed at the very beginning of a file (or more generally of any body to be evaluated), the result is the same as matching with a newline character (this makes it possible for a cpp-mode file to start with a meta-macro call). .P Two special syntax rules were added in version 2.1. First, argument references (#\fIn\fP) are no longer evaluated when they are outside of macro calls and definitions. However, they are no longer allowed to appear (unless protected by quote characters) inside a call to a defined user macro; the current behavior (backwards compatible) is to remove them silently from the input if that happens. .P Second, if the end sequence (either for macros or comments) consists of a single newline character, and if delimitation rules lead to evaluation in a context where the final newline character is absent, GPP silently ignores the missing newline instead of producing an error. The main consequence is that meta-macro calls can now be nested in a simple way in standard, cpp and Prolog modes. .SH EVALUATION RULES .P Input is read sequentially and interpreted according to the rules of the current mode. All input text is first matched against the specified comment/string start sequences of the current mode (except those which are disabled by the 'i' modifier), unless the body being evaluated is the contents of a comment/string whose modifier enables macro evaluation. The most recently defined comment/string specifications are checked for first. Important note: comments may not appear between the name of a macro and its arguments (doing so results in undefined behavior). .P Anything that is not a comment/string is then matched against a possible meta-macro call, and if that fails too, against a possible user-macro call. All remaining text undergoes substitution of argument reference sequences by the relevant argument text (empty unless the body being evaluated is the definition of a user macro) and removal of the quote character if there is one. .P Note that meta-macro arguments are passed to the meta-macro prior to any evaluation (although the meta-macro may choose to evaluate them, see meta-macro descriptions below). In the case of the \fI#mode\fP meta-macro, GPP temporarily adds a comment/string specification to enable recognition of C strings ("...") and prevent any evaluation inside them, so no interference of the characters being put in the C string arguments to \fI#mode\fP with the current syntax is to be feared. .P On the other hand, the arguments to a user macro are systematically evaluated, and then passed as context parameters to the macro definition body, which gets evaluated with that environment. The only exception is when the macro definition is empty, in which case its arguments are not evaluated. Note that GPP temporarily switches back to the mode in which the macro was defined in order to evaluate it, so it is perfectly safe to change the operating mode between the time a macro is defined and the time when it is called. Conversely, if a user macro wishes to work with the current mode instead of the one that was used to define it it needs to start with a \fI#mode restore\fP call and end with a \fI#mode save\fP call. .P A user macro may be defined with named arguments (see \fI#define\fP description below). In that case, when the macro definition is being evaluated, each named parameter causes a temporary virtual user-macro definition to be created; such a macro may be called only without arguments and simply returns the text of the corresponding argument. .P Note that, since macros are evaluated when they are called rather than when they are defined, any attempt to call a recursive macro causes undefined behavior except in the very specific case when the macro uses \fI#undef\fP to erase itself after finitely many loop iterations. .P Finally, a special case occurs when a user macro whose definition does not involve any arguments (neither named arguments nor the argument reference sequence) is called in a mode where the short user-macro end sequence is empty (\fIe.g.\fP, cpp or TeX\ mode). In that case it is assumed to be an \fIalias macro\fP: its arguments are first evaluated in the current mode as usual, but instead of being passed to the macro definition as parameters (which would cause them to be discarded) they are actually appended to the macro definition, using the syntax rules of the mode in which the macro was defined, and the resulting text is evaluated again. It is therefore important to note that, in the case of a macro alias, the arguments actually get evaluated twice in two potentially different modes. .SH META-MACROS .P These macros are always predefined. Their actual calling sequence depends on the current mode; here we use cpp-like notation. .TP .BI "#define " "x y" This defines the user macro \fIx\fP as \fIy\fP. \fIy\fP can be any valid GPP input, and may for example refer to other macros. \fIx\fP must be an identifier (\fIi.e.\fP, a sequence of alphanumeric characters and '_'), unless named arguments are specified. If \fIx\fP is already defined, the previous definition is overwritten. If no second argument is given, \fIx\fP will be defined as a macro that outputs nothing. Neither \fIx\fP nor \fIy\fP are evaluated; the macro definition is only evaluated when it is called, not when it is declared. It is also possible to name the arguments in a macro definition: in that case, the argument \fIx\fP should be a user-macro call whose arguments are all identifiers. These identifiers become available as user-macros inside the macro definition; these virtual macros must be called without arguments, and evaluate to the corresponding macro parameter. .TP .BI "#defeval " "x y" This acts in a similar way to \fI#define\fP, but the second argument \fIy\fP is evaluated immediately. Since user macro definitions are also evaluated each time they are called, this means that the macro \fIy\fP will undergo \fItwo\fP successive evaluations. The usefulness of \fI#defeval\fP is considerable as it is the only way to evaluate something more than once, which may be needed to force evaluation of the arguments of a meta-macro that normally doesn't perform any evaluation. However since all argument references evaluated at define-time are understood as the arguments of the body in which the macro is being defined and not as the arguments of the macro itself, usually one has to use the quote character to prevent immediate evaluation of argument references. .TP .BI "#undef " "x" This removes any existing definition of the user macro \fIx\fP. .TP .BI "#ifdef " "x" This begins a conditional block. Everything that follows is evaluated only if the identifier \fIx\fP is defined, and until either a \fI#else\fP or a \fI#endif\fP statement is reached. Note, however, that the commented text is still scanned thoroughly, so its syntax must be valid. It is in particular legal to have the \fI#else\fP or \fI#endif\fP statement ending the conditional block appear only as the result of a user-macro expansion and not explicitly in the input. .TP .BI "#ifndef " "x" This begins a conditional block. Everything that follows is evaluated only if the identifier \fIx\fP is not defined. .TP .BI "#ifeq " "x y" This begins a conditional block. Everything that follows is evaluated only if the results of the evaluations of \fIx\fP and \fIy\fP are identical as character strings. Any leading or trailing whitespace is ignored for the comparison. Note that in cpp-mode any unquoted whitespace character is understood as the end of the first argument, so it is necessary to be careful. .TP .BI "#ifneq " "x y" This begins a conditional block. Everything that follows is evaluated only if the results of the evaluations of \fIx\fP and \fIy\fP are not identical (even up to leading or trailing whitespace). .TP .BI "#else" "" This toggles the logical value of the current conditional block. What follows is evaluated if and only if the preceding input was commented out. .TP .BI "#endif" "" This ends a conditional block started by a \fI#if...\fP meta-macro. .TP .BI "#include " "file" This causes GPP to open the specified file and evaluate its contents, inserting the resulting text in the current output. All defined user macros are still available in the included file, and reciprocally all macros defined in the included file will be available in everything that follows. The include file is looked for first in the current directory, and then, if not found, in one of the directories specified by the \fI\-I\fP command-line option (or \fI/usr/include\fP if no directory was specified). Note that, for compatibility reasons, it is possible to put the file name between "" or <>. The order in which the various directories are searched for include files is affected by the \fI\-nostdinc\fP, \fI\-nocurinc\fP and \fI\-curdirinclast\fP command-line options. Upon including a file, GPP immediately saves a copy of the current operating mode onto the mode stack, and restores the operating mode at the end of the included file. The included file may override this behavior by starting with a \fI#mode restore\fP call and ending with a \fI#mode push\fP call. Additionally, when the \fI\-m\fP command line option is specified, GPP will automatically switch to the cpp compatibility mode upon including a file whose name ends with either '.c' or '.h'. .TP .BI "#exec " "command" This causes GPP to execute the specified command line and include its standard output in the current output. Note that, for security reasons, this meta-macro is disabled unless the \fI\-x\fP command line flag was specified. If use of \fI#exec\fP is not allowed, a warning message is printed and the output is left blank. Note that the specified command line is evaluated before being executed, thus allowing the use of macros in the command-line. However, the output of the command is included verbatim and not evaluated. If you need the output to be evaluated, you must use \fI#defeval\fP (see above) to cause a double evaluation. .TP .BI "#eval " "expr" The \fI#eval\fP meta-macro attempts to evaluate \fIexpr\fP first by expanding macros (normal GPP evaluation) and then by performing arithmetic evaluation and/or wildcard matching. The syntax and operator precedence for arithmetic expressions are the same as in C; the only missing operators are <<, >>, ?:, and the assignment operators. POSIX-style wildcard matching ('globbing') is available only on POSIX implementations and can be invoked with the =~ operator. In brief, a '?' matches any single character, a '*' matches any string (including the empty string), and '[...]' matches any one of the characters enclosed in brackets. A '[...]' class is complemented when the first character in the brackets is '!'. The characters in a '[...]' class can also be specified as a range using the '\-' character -- \fIe.g.\fP, '[F\-N]' is equivalent to '[FGHIJKLMN]'. If unable to assign a numerical value to the result, the returned text is simply the result of macro expansion without any arithmetic evaluation. The only exceptions to this rule are the comparison operators ==, !=, <, >, <=, and >= which, if one of the sides does not evaluate to a number, perform string comparison instead (ignoring trailing and leading spaces). Additionally, the \fIlength(...)\fP arithmetic operator returns the length in characters of its evaluated argument. Inside arithmetic expressions, the \fIdefined(...)\fP special user macro is also available: it takes only one argument, which is not evaluated, and returns 1 if it is the name of a user macro and 0 otherwise. .TP .BI "#if " "expr" This meta-macro invokes the arithmetic/globbing evaluator in the same manner as \fI#eval\fP and compares the result of evaluation with the string "0" in order to begin a conditional block. In particular note that the logical value of \fIexpr\fP is always true when it cannot be evaluated to a number. .TP .BI "#elif " "expr" This meta-macro can be used to avoid nested \fI#if\fP conditions. \fI#if\fP ... \fI#elif\fP ... \fI#endif\fP is equivalent to \fI#if\fP ... \fI#else\fP \fI#if\fP ... \fI#endif\fP \fI#endif\fP. .TP .BI "#mode " "keyword ..." This meta-macro controls GPP's operating mode. See below for a list of \fI#mode\fP commands. .TP .BI "#line" "" This meta-macro evaluates to the line number of the current input file. .TP .BI "#file" "" This meta-macro evaluates to the filename of the current input file as it appears on the command line or in the argument to \fI#include\fP. If GPP is reading its input from stdin, then \fI#file\fP evaluates to `stdin'. .TP .BI "#date " "fmt" This meta-macro evaluates to the current date and time as formatted by the specified format string \fIfmt\fP. See the section \fIDATE AND TIME CONVERSION SPECIFIERS\fP below. .TP .BI "#error " "msg" This meta-macro causes an error message with the current filename and line number, and with the text \fImsg\fP, to be printed to the standard error device. Subsequent processing is then aborted. .TP .BI "#warning " "msg" This meta-macro causes a warning message with the current filename and line number, and with the text \fImsg\fP, to be printed to the standard error device. Subsequent processing is then resumed. .P The key to GPP's flexibility is the \fI#mode\fP meta-macro. Its first argument is always one of a list of available keywords (see below); its second argument is always a sequence of words separated by whitespace. Apart from possibly the first of them, each of these words is always a delimiter or syntax specifier, and should be provided as a C string delimited by double quotes ("\ "). The various special matching sequences listed in the section on syntax specification are available. Any \fI#mode\fP command is parsed in a mode where "..." is understood to be a C-style string, so it is safe to put any character inside these strings. Also note that the first argument of \fI#mode\fP (the keyword) is never evaluated, while the second argument is evaluated (except of course for the contents of C strings), so that the syntax specification may be obtained as the result of a macro evaluation. .P The available \fI#mode\fP commands are: .TP .BI "#mode save / #mode push" "" Push the current mode specification onto the mode stack. .TP .BI "#mode restore / #mode pop" "" Pop mode specification from the mode stack. .TP .BI "#mode standard " "name" Select one of the standard modes. The only argument must be one of: default (default mode); cpp, C (cpp mode); tex, TeX\ (tex mode); html, HTML (html mode); xhtml, XHTML (xhtml mode); prolog, Prolog (prolog mode). The mode name must be given directly, not as a C string. .TP .BI "#mode user " """s1"" ... ""s9""" Specify user macro syntax. The 9 arguments, all of them C strings, are the mode specification for user macros (see the \-U command-line option and the section on syntax specification). The meta-macro specification is not affected. .TP .BI "#mode meta " "{user | ""s1"" ... ""s7""}" Specify meta-macro syntax. Either the only argument is \fIuser\fP (not as a string), and the user-macro mode specifications are copied into the meta-macro mode specifications, or there must be seven string arguments, whose significance is the same as for the \-M command-line option (see section on syntax specification). .TP .BI "#mode quote " "[""c""]" With no argument or "" as argument, removes the quote character specification and disables the quoting functionality. With one string argument, the first character of the string is taken to be the new quote character. The quote character can be neither alphanumeric nor '_', nor can it be one of the special matching sequences. .TP .BI "#mode comment " "[xxx] ""start"" ""end"" [""c"" [""c""]]" Add a comment specification. Optionally a first argument consisting of three characters not enclosed in "\ " can be used to specify a comment/string modifier (see the section on syntax specification). The default modifier is \fIccc\fP. The first two string arguments are used as comment start and end sequences respectively. The third string argument is optional and can be used to specify a string-quote character. (If it is "", the functionality is disabled.) The fourth string argument is optional and can be used to specify a string delimitation warning character. (If it is "", the functionality is disabled.) .TP .BI "#mode string " "[xxx] ""start"" ""end"" [""c"" [""c""]]" Add a string specification. Identical to \fI#mode comment\fP except that the default modifier is \fIsss\fP. .TP .BI "#mode nocomment / #mode nostring " "[""start""]" With no argument, remove all comment/string specifications. With one string argument, delete the comment/string specification whose start sequence is the argument. .TP .BI "#mode preservelf " "{ on | off | 1 | 0 }" Equivalent to the \fI-n\fP command-line switch. If the argument is \fIon\fP or \fI1\fP, any newline or whitespace character terminating a macro call or a comment/string is left in the input stream for further processing. If the argument is \fIoff\fP or \fI0\fP this feature is disabled. .TP .BI "#mode charset " "{ id | op | par } ""string""" Specify the character sets to be used for matching the \\o, \\O and \\i special sequences. The first argument must be one of \fIid\fP (the set matched by \\i), \fIop\fP (the set matched by \\o) or \fIpar\fP (the set matched by \\O in addition to the one matched by \\o). \fI"string"\fP is a C string which lists all characters to put in the set. It may contain only the special matching sequences \\a, \\A, \\b, \\B, and \\# (the other sequences and the negated sequences are not allowed). When a '-' is found inbetween two non-special characters this adds all characters inbetween (e.g. "A-Z" corresponds to all uppercase characters). To have '-' in the matched set, either put it in first or last position or place it next to a \\x sequence. .SH DATE AND TIME CONVERSION SPECIFIERS Ordinary characters placed in the format string are copied to without conversion. Conversion specifiers are introduced by a `%' character, and are replaced as follows: .TP .BI "%a" "" The abbreviated weekday name according to the current locale. .TP .BI "%A" "" The full weekday name according to the current locale. .TP .BI "%b" "" The abbreviated month name according to the current locale. .TP .BI "%B" "" The full month name according to the current locale. .TP .BI "%c" "" The preferred date and time representation for the current locale. .TP .BI "%d" "" The day of the month as a decimal number (range 01 to 31). .TP .BI "%F" "" Equivalent to %Y-%m-%d (the ISO 8601 date format). .TP .BI "%H" "" The hour as a decimal number using a 24-hour clock (range 00 to 23). .TP .BI "%I" "" The hour as a decimal number using a 12-hour clock (range 01 to 12). .TP .BI "%j" "" The day of the year as a decimal number (range 001 to 366). .TP .BI "%m" "" The month as a decimal number (range 01 to 12). .TP .BI "%M" "" The minute as a decimal number (range 00 to 59). .TP .BI "%p" "" Either `AM' or `PM' according to the given time value, or the corresponding strings for the current locale. Noon is treated as `pm' and midnight as `am'. .TP .BI "%R" "" The time in 24-hour notation (%H:%M). .TP .BI "%S" "" The second as a decimal number (range 00 to 61). .TP .BI "%U" "" The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01. .TP .BI "%w" "" The day of the week as a decimal, range 0 to 6, Sunday being 0. .TP .BI "%W" "" The week number of the current year as a decimal number, range 00 to 53, starting with the first Monday as the first day of week 01. .TP .BI "%x" "" The preferred date representation for the current locale without the time. .TP .BI "%X" "" The preferred time representation for the current locale without the date. .TP .BI "%y" "" The year as a decimal number without a century (range 00 to 99). .TP .BI "%Y" "" The year as a decimal number including the century. .TP .BI "%Z" "" The time zone or name or abbreviation. .TP .BI "%%" "" A literal `%' character. .P Depending on the C compiler and library used to compile GPP, there may be more conversion specifiers available. Consult your compiler's documentation for the \fIstrftime()\fP function. Note, however, that any conversion specifiers not listed above may not be portable across installations of GPP. .SH EXAMPLES Here is a basic self-explanatory example in standard or cpp mode: #define FOO This is #define BAR a message. #define concat #1 #2 concat(FOO,BAR) #ifeq (concat(foo,bar)) (foo bar) This is output. #else This is not output. #endif Using argument naming, the \fIconcat\fP macro could alternatively be defined as #define concat(x,y) x y In TeX\ mode and using argument naming, the same example becomes: \\define{FOO}{This is} \\define{BAR}{a message.} \\define{\\concat{x}{y}}{\\x \\y} \\concat{\\FOO}{\\BAR} \\ifeq{\\concat{foo}{bar}}{foo bar} This is output. \\else This is not output. \\endif In HTML mode and without argument naming, one gets similarly: <#define FOO|This is> <#define BAR|a message.> <#define concat|#1 #2> <#concat <#FOO>|<#BAR>> <#ifeq <#concat foo|bar>|foo bar> This is output. <#else> This is not output. <#endif> The following example (in standard mode) illustrates the use of the quote character: #define FOO This is \\ a multiline definition. #define BLAH(x) My argument is x BLAH(urf) \\BLAH(urf) Note that the multiline definition is also valid in cpp and Prolog modes despite the absence of quote character, because '\\' followed by a newline is then interpreted as a comment and discarded. .P In cpp mode, C strings and comments are understood as such, as illustrated by the following example: #define BLAH foo BLAH "BLAH" /* BLAH */ 'It\\'s a /*string*/ !' The main difference between Prolog mode and cpp mode is the handling of strings and comments: in Prolog, a '...' string may not begin immediately after a digit, and a /*...*/ comment may not begin immediately after an operator character. Furthermore, comments are not removed from the output unless they occur in a #command. .P The differences between cpp mode and default mode are deeper: in default mode #commands may start anywhere, while in cpp mode they must be at the beginning of a line; the default mode has no knowledge of comments and strings, but has a quote character ('\\'), while cpp mode has extensive comment/string specifications but no quote character. Moreover, the arguments to meta-macros need to be correctly parenthesized in default mode, while no such checking is performed in cpp mode. .P This makes it easier to nest meta-macro calls in default mode than in cpp mode. For example, consider the following HTML mode input, which tests for the availability of the \fI#exec\fP command: <#ifeq <#exec echo blah>|blah > #exec allowed <#else> #exec not allowed <#endif> There is no cpp mode equivalent, while in default mode it can be easily translated as #ifeq (#exec echo blah ) (blah ) \\#exec allowed #else \\#exec not allowed #endif In order to nest meta-macro calls in cpp mode it is necessary to modify the mode description, either by changing the meta-macro call syntax, or more elegantly by defining a silent string and using the fact that the context at the beginning of an evaluated string is a newline character: #mode string QQQ "$" "$" #ifeq $#exec echo blah $ $blah $ \\#exec allowed #else \\#exec not allowed #endif Note, however, that comments/strings cannot be nested ("..." inside $...$ would go undetected), so one needs to be careful about what to include inside such a silent evaluated string. In this example, the loose meta-macro nesting introduced in version 2.1 makes it possible to use the following simpler version: #ifeq blah #exec echo -n blah \\#exec allowed #else \\#exec not allowed #endif Remember that macros without arguments are actually understood to be aliases when they are called with arguments, as illustrated by the following example (default or cpp mode): #define DUP(x) x x #define FOO and I said: DUP FOO(blah) The usefulness of the \fI#defeval\fP meta-macro is shown by the following example in HTML mode: <#define APPLY|<#defeval TEMP|<\\##1 \\#1>><#TEMP #2>> <#define <#foo x>|<#x> and <#x>> <#APPLY foo|BLAH> The reason why \fI#defeval\fP is needed is that, since everything is evaluated in a single pass, the input that will result in the desired macro call needs to be generated by a first evaluation of the arguments passed to APPLY before being evaluated a second time. .P To translate this example in default mode, one needs to resort to parenthesizing in order to nest the #defeval call inside the definition of APPLY, but need to do so without outputting the parentheses. The easiest solution is #define BALANCE(x) x #define APPLY(f,v) BALANCE(#defeval TEMP f TEMP(v)) #define foo(x) x and x APPLY(\\foo,BLAH) As explained above the simplest version in cpp mode relies on defining a silent evaluated string to play the role of the BALANCE macro. .P The following example (default or cpp mode) demonstrates arithmetic evaluation: #define x 4 The answer is: #eval x*x + 2*(16-x) + 1998%x #if defined(x)&&!(3*x+5>17) This should be output. #endif To finish, here are some examples involving mode switching. The following example is self-explanatory (starting in default mode): #mode push #define f(x) x x #mode standard tex \\f{blah} \\mode{string}{"$" "$"} \\mode{comment}{"/*" "*/"} $\\f{urf}$ /* blah */ \\define{FOO}{bar/* and some more */} \\mode{pop} f($FOO$) A good example where a user-defined mode becomes useful is the GPP source of this document (available with GPP's source code distribution). .P Another interesting application is selectively forcing evaluation of macros in C strings when in cpp mode. For example, consider the following input: #define blah(x) "and he said: x" blah(foo) Obviously one would want the parameter \fIx\fP to be expanded inside the string. There are several ways around this problem: #mode push #mode nostring "\\"" #define blah(x) "and he said: x" #mode pop #mode quote "`" #define blah(x) `"and he said: x`" #mode string QQQ "$$" "$$" #define blah(x) $$"and he said: x"$$ The first method is very natural, but has the inconvenience of being lengthy and neutralizing string semantics, so that having an unevaluated instance of 'x' in the string, or an occurrence of '/*', would be impossible without resorting to further contortions. .P The second method is slightly more efficient because the local presence of a quote character makes it easier to control what is evaluated and what isn't, but has the drawback that it is sometimes impossible to find a reasonable quote character without having to either significantly alter the source file or enclose it inside a \fI#mode push/pop\fP construct. For example, any occurrence of '/*' in the string would have to be quoted. .P The last method demonstrates the efficiency of evaluated strings in the context of selective evaluation: since comments/strings cannot be nested, any occurrence of '"' or '/*' inside the '$$' gets output as plain text, as expected inside a string, and only macro evaluation is enabled. Also note that there is much more freedom in the choice of a string delimiter than in the choice of a quote character. .P Starting with version 2.1, meta-macro calls can be nested more efficiently in default, cpp and Prolog modes. This makes it easy to make a user version of a meta-macro, or to increment a counter: #define myeval #eval #1 #define x 1 #defeval x #eval x+1 .SH ADVANCED EXAMPLES .P Here are some examples of advanced constructions using GPP. They tend to be pretty awkward and should be considered as evidence of GPP's limitations. .P The first example is a recursive macro. The main problem is that (since GPP evaluates everything) a recursive macro must be very careful about the way in which recursion is terminated in order to avoid undefined behavior (most of the time GPP will simply crash). In particular, relying on a \fI#if/#else/#endif\fP construct to end recursion is not possible and results in an infinite loop, because GPP scans user macro calls even in the unevaluated branch of the conditional block. A safe way to proceed is for example as follows (we give the example in TeX\ mode): \\define{countdown}{ \\if{#1} #1... \\define{loop}{\\countdown} \\else Done. \\define{loop}{} \\endif \\loop{\\eval{#1-1}} } \\countdown{10} .P Another example, in cpp mode: #mode string QQQ "$" "$" #define triangle(x,y) y \\ $#if length(y) LAMBDA(z,z+z) LAMBDA(z,z+z,2) => 2+2 #define f LAMBDA(y,y*y) f => LAMBDA(y,y*y) APPLY(f,blah) => blah*blah APPLY(LAMBDA(t,t t),(t t)) => (t t) (t t) LAMBDA(x,APPLY(f,(x+x)),urf) => (urf+urf)*(urf+urf) APPLY(APPLY(LAMBDA(x,LAMBDA(y,x*y)),foo),bar) => foo*bar #define test LAMBDA(y,`#ifeq y urf y is urf#else y is not urf#endif `) APPLY(test,urf) => urf is urf APPLY(test,foo) => foo is not urf .SH SEE ALSO strftime(3), glob(7), m4(1V), cpp(1) .P GPP home page: http://www.nothingisreal.com/gpp/ .SH AUTHOR GPP was written by Denis Auroux . Since version 2.12 it has been maintained by Tristan Miller . .SH COPYRIGHT Copyright (C)\ 1996-2001 Denis Auroux. .P Copyright (C)\ 2003, 2004 Tristan Miller. .P Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and this permission notice are preserved, thus giving the recipient permission to redistribute in turn. .P Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last changed them. gpp-2.24/doc/gpp.pp0000644000076400001440000016474510123364704007625 <#mode preservelf|off><#mode comment|"%%%" "\n">%%% %%%% %%%% $Id: gpp.pp,v 1.6 2004/09/19 20:19:16 psy Exp $ %%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%% GPP documentation source file %%%% %%%% (C) 2001 Denis Auroux %%%% %%%% (C) 2003, 2004 Tristan Miller %%%% %%%% %%%% %%%% To get the man page, run: %%%% %%%% gpp -H -Dman gpp.pp -o gpp.1 %%%% %%%% To get the html page, run: %%%% %%%% gpp -H -Dhtml gpp.pp -o gpp.html %%%% %%%% To get a latex version, run: %%%% %%%% gpp -H -Dlatex gpp.pp -o gpp.tex %%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%% %%%% <#mode user|"$" "$" "{" "}{" "}$" "{" "}" "@@@" "~">%%% <#mode meta|"$" "$\w\n" "{" "}{" "}$\w\n" "{" "}">%%% %%%% %%%%%%%%%%% HTML page macro definitions %%%%%%%%%%% $ifdef{html}$ $define{P}{

}$ $define{p}{

}$ $define{BR}{
}$ $define{I}{@@@1}$ $define{S}{

@@@1

}$ $define{B}{@@@1}$ $define{l}{<}$ $define{g}{>}$ $define{d}{-}$ $define{b}{\}$ $define{pre}{
}$
$define{nopre}{
}$ $define{list}{
    @@@1
}$ $define{li}{

  • }$ $define{BI}{@@@1@@@2
    }$ $define{bi}{@@@1:}$ $define{s}{"@@@1"}$ $define{pc}{%}$ $define{tilde}{~~}$ $define{and}{&}$ $define{dollar}{~$}$ $define{bra}{~{}$ $define{ket}{~}}$ $define{dz}{#}$ $define{und}{_}$ $define{copy}{©}$ $define{nbsp}{ }$ $define{TeX}{TeX}$ $define{ldots}{…}$ $define{mdash}{—}$ $define{ndash}{–}$ $define{exp}{^}$ $define{pipe}{|}$ $else$ %%%%%%%%%%% man page macro definitions %%%%%%%%%%%% $ifdef{man}$ $define{P}{ .P}$ $define{p}{}$ $define{BR}{ .P}$ $define{I}{\fI@@@1\fP}$ $define{S}{ .SH @@@1}$ $define{B}{.B @@@1}$ $define{l}{<}$ $define{g}{>}$ $define{d}{\-}$ $define{b}{\\}$ $define{pre}{ }$ $define{nopre}{}$ $define{list}{@@@1}$ $define{li}{.TP}$ $define{BI}{.BI "@@@1" "@@@2"}$ $define{bi}{.BI "@@@1" ""}$ $define{s}{""@@@1""}$ $define{pc}{%}$ $define{tilde}{~~}$ $define{and}{&}$ $define{dollar}{~$}$ $define{bra}{~{}$ $define{ket}{~}}$ $define{dz}{#}$ $define{und}{_}$ $define{copy}{(C)}$ $define{nbsp}{\ }$ $define{TeX}{TeX}$ $define{ldots}{...}$ $define{mdash}{ -- }$ $define{ndash}{-}$ $define{exp}{^}$ $define{pipe}{|}$ $else$ %%%%%%%%%%% latex page macro definitions %%%%%%%%%%% $ifdef{latex}$ $define{P}{ }$ $define{p}{ }$ $define{BR}{ }$ $define{I}{$isverb{@@@1}{{\it @@@1}}$}$ $define{S}{\subsection{@@@1}}$ $define{B}{{\bf @@@1}}$ $define{l}{$isverb{<}{$<$}$}$ $define{g}{$isverb{>}{$>$}$}$ $define{d}{-}$ $define{b}{$isverb{\}{$\backslash$}$}$ $define{pre}{$define{inverb}$ \begin{verbatim}}$ $define{nopre}{\end{verbatim}$undef{inverb}$ }$ $define{isverb}{$ifdef{inverb}$ @@@1$else$ @@@2$endif$ }$ $define{list}{\begin{itemize}@@@1\end{itemize}}$ $define{li}{\item}$ $define{BI}{{\bf @@@1} @@@2\\}$ $define{bi}{{\bf @@@1}: }$ $define{s}{"@@@1"}$ $define{pc}{$isverb{%}{\%}$}$ $define{tilde}{$isverb{~~}{$\sim$}$}$ $define{and}{$isverb{&}{\&}$}$ $define{dollar}{$isverb{~$}{\~$}$}$ $define{bra}{$isverb{~{}{\~{}$}$ $define{ket}{$isverb{~}}{\~}}$}$ $define{dz}{$isverb{#}{\#}$}$ $define{TeX}{\TeX}$ $define{und}{$isverb{_}{\_}$}$ $define{copy}{\copyright}$ $define{nbsp}{~~}$ $define{ldots}{\ldots}$ $define{mdash}{---}$ $define{ndash}{--}$ $define{exp}{$isverb{^}{\^{}}$}$ $define{pipe}{$isverb{|}{$|$}$}$ $else$ This is the gpp help file. To get the man page, run: gpp -H -Dman gpp.pp -o gpp.1 To get the HTML page, run: gpp -H -Dhtml gpp.pp -o gpp.html To get a LaTeX version, run: gpp -H -Dlatex gpp.pp -o gpp.tex $mode{comment}{"!!!" "!!!"}$ !!! $endif$ $endif$ $endif$ %%%%%%%%%%%%%%%%% some headers %%%%%%%%%%%%%%%%%%% $define{version}{2.24}$ $define{SYNTAX}{ $pre$ gpp [$d$$bra$o$pipe$O$ket$ $I{outfile}$] [$d$I$I{/include/path}$] [$d$D$I{name=val}$ ...] [$d$z$pipe$+z] [$d$x] [$d$m] [$d$C$pipe$$d$T$pipe$$d$H$pipe$$d$X$pipe$$d$P$pipe$$d$U ... [$d$M ...]] [$d$n$pipe$+n] [+c$I{$l$n$g$}$ $I{str1}$ $I{str2}$] [+s$I{$l$n$g$}$ $I{str1}$ $I{str2}$ $I{c}$] [$d$c $I{str1}$] [$d$$d$nostdinc] [$d$$d$nocurinc] [$d$$d$curdirinclast] [$d$$d$warninglevel $I{n}$] [$d$$d$includemarker $I{str}$] [$d$$d$include $I{file}$] [$I{infile}$] gpp $d$$d$help gpp $d$$d$version$nopre$ }$ $ifdef{html}$ GPP $version$ $mdash$ Generic Preprocessor

    GPP $version$ — Generic Preprocessor

    N.B. $mdash$ The latest version of GPP and this manual are available from the GPP home page. $else$ $ifdef{man}$ .TH GPP 1 \" -*- nroff -*- .SH NAME GPP \- Generic Preprocessor .SH SYNOPSIS $SYNTAX$%%% $else$ \documentclass[12pt]{article} \title{GPP$nbsp$$version$ $mdash$ Generic Preprocessor} \author{Denis Auroux, Tristan Miller} \date{} \renewcommand{\thesubsection}{\arabic{subsection}} \begin{document} \maketitle $endif$ $endif$ %%%%%%%%%%%%%% description section %%%%%%%%%%%%%%%%%%%% $S{DESCRIPTION}$ $P$ GPP is a general-purpose preprocessor with customizable syntax, suitable for a wide range of preprocessing tasks. Its independence from any programming language makes it much more versatile than cpp, while its syntax is lighter and more flexible than that of m4. $P$ GPP is targeted at all common preprocessing tasks where cpp is not suitable and where no very sophisticated features are needed. In order to be able to process equally efficiently text files or source code in a variety of languages, the syntax used by GPP is fully customizable. The handling of comments and strings is especially advanced. $P$ Initially, GPP only understands a minimal set of built-in macros, called $I{meta-macros}$. These meta-macros allow the definition of $I{user macros}$ as well as some basic operations forming the core of the preprocessing system, including conditional tests, arithmetic evaluation, wildcard matching (globbing), and syntax specification. All user macro definitions are global$mdash$$I{i.e.}$, they remain valid until explicitly removed; meta-macros cannot be redefined. With each user macro definition GPP keeps track of the corresponding syntax specification so that a macro can be safely invoked regardless of any subsequent change in operating mode. $P$ In addition to macros, GPP understands comments and strings, whose syntax and behavior can be widely customized to fit any particular purpose. Internally comments and strings are the same construction, so everything that applies to comments applies to strings as well. $ifndef{man}$ $S{SYNTAX}$ $SYNTAX$ $endif$ %%%%%%%%%%%%%%%% command-line options %%%%%%%%%%%%%%%%%%%% $S{OPTIONS}$ $P$ GPP recognizes the following command-line switches and options. Note that the $d$nostdinc, $d$nocurinc, $d$curdirinclast, $d$warninglevel, and $d$includemarker options from version 2.1 and earlier are deprecated and should not be used. Use the "long option" variants instead ($d$$d$nostdinc, $I{etc.}$). $list{$li$ $BI{$d$h $d$$d$help}$ Print a short help message. $li$ $BI{$d$$d$version}$ Print version information. $li$ $BI{$d$o }{outfile}$ Specify a file to which all output should be sent (by default, everything is sent to standard output). $li$ $BI{$d$O }{outfile}$ Specify a file to which all output should be sent; output is simultanously sent to stdout. $li$ $BI{$d$I}{/include/path}$ Specify a path where the $I{$dz$include}$ meta-macro will look for include files if they are not present in the current directory. The default is /usr/include if no $d$I option is specified. Multiple $d$I options may be specified to look in several directories. $li$ $BI{$d$D}{name=val}$ Define the user macro $I{name}$ as equal to $I{val}$. This is strictly equivalent to using the $I{$dz$define}$ meta-macro, but makes it possible to define macros from the command-line. If $I{val}$ makes references to arguments or other macros, it should conform to the syntax of the mode specified on the command-line. Starting with version 2.1, macro argument naming is allowed on the command-line. The syntax is as follows: $d$D$I{macro}$($I{arg1}$,$ldots$)=$I{definition}$. The arguments are specified in C-style syntax, without any whitespace, but the definition should still conform to the syntax of the mode specified on the command-line. $li$ $BI{+z}$ Set text mode to Unix mode (LF terminator). Any CR character in the input is systematically discarded. This is the default under Unix systems. $li$ $BI{$d$z}$ Set text mode to DOS mode (CR$ndash$LF terminator). In this mode all CR characters are removed from the input, and all output LF characters are converted to CR$ndash$LF. This is the default if GPP is compiled with the WIN$und$NT option. $li$ $BI{$d$x}$ Enable the use of the $I{$dz$exec}$ meta-macro. Since $I{$dz$exec}$ includes the output of an arbitrary shell command line, it may cause a potential security threat, and is thus disabled unless this option is specified. $li$ $BI{$d$m}$ Enable automatic mode switching to the cpp compatibility mode if the name of an included file ends in `.h' or `.c'. This makes it possible to include C header files with only minor modifications. $li$ $BI{$d$n}$ Prevent newline or whitespace characters from being removed from the input when they occur as the end of a macro call or of a comment. By default, when a newline or whitespace character forms the end of a macro or a comment it is parsed as part of the macro call or comment and therefore removed from output. Use the $d$n option to keep the last character in the input stream if it was whitespace or a newline. This is activated in cpp and Prolog modes. $li$ $BI{+n}$ The opposite of $d$n. This is the default in all modes except cpp and Prolog. Note that +n must be placed $I{after}$ $d$C or $d$P in order to have any effect. $li$ $BI{$d$U }{arg1 $ldots$ arg9}$ User-defined mode. The nine following command-line arguments are taken to be respectively the macro start sequence, the macro end sequence for a call without arguments, the argument start sequence, the argument separator, the argument end sequence, the list of characters to stack for argument balancing, the list of characters to unstack, the string to be used for referring to an argument by number, and finally the quote character (if there is none an empty string should be provided). These settings apply both to user macros and to meta-macros, unless the $d$M option is used to define other settings for meta-macros. See the section on syntax specification for more details. $li$ $BI{$d$M }{arg1 $ldots$ arg7}$ User-defined mode specifications for meta-macros. This option can only be used together with $d$M. The seven following command-line arguments are taken to be respectively the macro start sequence, the macro end sequence for a call without arguments, the argument start sequence, the argument separator, the argument end sequence, the list of characters to stack for argument balancing, and the list of characters to unstack. See below for more details. $li$ $BI{(default mode)}$ The default mode is a vaguely cpp-like mode, but it does not handle comments, and presents various incompatibilities with cpp. Typical meta-macros and user macros look like this: $pre$ $dz$define x y macro(arg,...) $nopre$ This mode is equivalent to $pre$ -U "" "" "(" "," ")" "(" ")" "$dz$" "$b$$b$" -M "$dz$" "$b$n" " " " " "$b$n" "(" ")" $nopre$ $li$ $BI{$d$C}$ cpp compatibility mode. This is the mode where GPP's behavior is the closest to that of cpp. Unlike in the default mode, meta-macro expansion occurs only at the beginning of lines, and C comments and strings are understood. This mode is equivalent to $pre$ -n -U "" "" "(" "," ")" "(" ")" "$dz$" "" -M "$b$n$dz$$b$w" "$b$n" " " " " "$b$n" "" "" +c "/*" "*/" +c "//" "$b$n" +c "$b$$b$$b$n" "" +s "$b$"" "$b$"" "$b$$b$" +s "'" "'" "$b$$b$" $nopre$ $li$ $BI{$d$T}$ $TeX$-like mode. In this mode, typical meta-macros and user macros look like this: $pre$ $b$define$bra$x$ket$$bra$y$ket$ $b$macro$bra$arg$ket$$bra$...$ket$ $nopre$ No comments are understood. This mode is equivalent to $pre$ -U "$b$$b$" "" "$bra$" "$ket$$bra$" "$ket$" "$bra$" "$ket$" "$dz$" "@" $nopre$ $li$ $BI{$d$H}$ HTML-like mode. In this mode, typical meta-macros and user macros look like this: $pre$ $l$$dz$define x$pipe$y$g$ $l$$dz$macro arg$pipe$...$g$ $nopre$ No comments are understood. This mode is equivalent to $pre$ -U "$l$$dz$" "$g$" "$b$B" "$pipe$" "$g$" "$l$" "$g$" "$dz$" "$b$$b$" $nopre$ $li$ $BI{$d$X}$ XHTML-like mode. In this mode, typical meta-macros and user macros look like this: $pre$ $l$$dz$define x$pipe$y/$g$ $l$$dz$macro arg$pipe$.../$g$ $nopre$ No comments are understood. This mode is equivalent to $pre$ -U "$l$$dz$" "/$g$" "$b$B" "$pipe$" "/$g$" "$l$" "$g$" "$dz$" "$b$$b$" $nopre$ $li$ $BI{$d$P}$ Prolog-compatible cpp-like mode. This mode differs from the cpp compatibility mode by its handling of comments, and is equivalent to $pre$ -n -U "" "" "(" "," ")" "(" ")" "$dz$" "" -M "$b$n$dz$$b$w" "$b$n" " " " " "$b$n" "" "" +ccss "$b$!o/*" "*/" +ccss "$pc$" "$b$n" +ccii "$b$$b$$b$n" "" +s "$b$"" "$b$"" "" +s "$b$!$dz$'" "'" "" $nopre$ $li$ $BI{+c}{$l$n$g$ str1 str2}$ Specify comments. Any unquoted occurrence of $I{str1}$ will be interpreted as the beginning of a comment. All input up to the first following occurrence of $I{str2}$ will be discarded. This option may be used multiple times to specify different types of comment delimiters. The optional parameter $I{$l$n$g$}$ can be specified to alter the behavior of the comment and, $I{e.g.}$, turn it into a string or make it ignored under certain circumstances, see below. $li$ $BI{$d$c }{str1}$ Un-specify comments or strings. The comment/string specification whose start sequence is $I{str1}$ is removed. This is useful to alter the built-in comment specifications of a standard mode$mdash$$I{e.g.}$, the cpp compatibility mode. $li$ $BI{+s}{$l$n$g$ str1 str2 c}$ Specify strings. Any unquoted occurrence of $I{str1}$ will be interpreted as the beginning of a string. All input up to the first following occurrence of $I{str2}$ will be output as is without any evaluation. The delimiters themselves are output. If $I{c}$ is non-empty, its first character is used as a $I{string-quote character}$$mdash$$I{i.e.}$, a character whose presence immediately before an occurrence of $I{str2}$ prevents it from terminating the string. The optional parameter $I{$l$n$g$}$ can be specified to alter the behavior of the string and, $I{e.g.}$, turn it into a comment, enable macro evaluation inside the string, or make the string specification ignored under certain circumstances. See below. $li$ $BI{$d$s }{str1}$ Un-specify comments or strings. Identical to $d$c. $li$ $BI{$d$$d$include }{file}$ Process $I{file}$ before $I{infile}$ $li$ $BI{$d$$d$nostdinc}$ Do not look for include files in the standard directory /usr/include. $li$ $BI{$d$$d$nocurinc}$ Do not look for include files in the current directory. $li$ $BI{$d$$d$curdirinclast}$ Look for include files in the current directory $I{after}$ the directories specified by $I{$d$I}$ rather than before them. $li$ $BI{$d$$d$warninglevel }{n}$ Set warning level to $I{n}$ (0, 1 or 2). Default is 2 (most verbose). $li$ $BI{$d$$d$includemarker }{str}$ keep track of $I{$dz$include}$ directives by inserting a marker in the output stream. The format of the marker is determined by $I{str}$, which must contain three occurrences of the character $I{$pc$}$ (or equivalently $I{?}$). The first occurrence is replaced with the line number, the second with the file name, and the third with 1, 2 or blank. When this option is specified in default, cpp or Prolog mode, GPP does its best to ensure that line numbers are the same in the output as in the input by inserting blank lines in the place of definitions or comments. $li$ $BI{infile}$ Specify an input file from which GPP reads its input. If no input file is specified, input is read from standard input. }$ %%%%%%%%%%%%%%%%% syntax specification %%%%%%%%%%%%%%%%%%% $S{SYNTAX SPECIFICATION}$ $P$ The syntax of a macro call is as follows: it must start with a sequence of characters matching the $I{macro start sequence}$ as specified in the current mode, followed immediately by the name of the macro, which must be a valid $I{identifier}$$mdash$$I{i.e.}$, a sequence of letters, digits, or underscores ("$und$"). The macro name must be followed by a $I{short macro end sequence}$ if the macro has no arguments, or by a sequence of arguments initiated by an $I{argument start sequence}$. The various arguments are then separated by an $I{argument separator}$, and the macro ends with a $I{long macro end sequence}$. $P$ In all cases, the parameters of the current context$mdash$$I{i.e.}$, the arguments passed to the body being evaluated$mdash$can be referred to by using an $I{argument reference sequence}$ followed by a digit between 1 and 9. Alternatively, macro parameters may be named (see below). Furthermore, to avoid interference between the GPP syntax and the contents of the input file, a $I{quote character}$ is provided. The quote character can be used to prevent the interpretation of a macro call, comment, or string as anything but plain text. The quote character "protects" the following character, and always gets removed during evaluation. Two consecutive quote characters evaluate as a single quote character. $P$ Finally, to facilitate proper argument delimitation, certain characters can be "stacked" when they occur in a macro argument, so that the argument separator or macro end sequence are not parsed if the argument body is not balanced. This allows nesting macro calls without using quotes. If an improperly balanced argument is needed, quote characters should be added in front of some stacked characters to make it balanced. $P$ The macro construction sequences described above can be different for meta-macros and for user macros: this is the case in cpp mode, for example. Note that, since meta-macros can only have up to two arguments, the delimitation rules for the second argument are somewhat sloppier, and unquoted argument separator sequences are allowed in the second argument of a meta-macro. $P$ Unless one of the standard operating modes is selected, the above syntax sequences can be specified either on the command-line, using the $d$M and $d$U options respectively for meta-macros and user macros, or inside an input file via the $I{$dz$mode meta}$ and $I{$dz$mode user}$ meta-macro calls. In both cases the mode description consists of nine parameters for user macro specifications, namely the macro start sequence, the short macro end sequence, the argument start sequence, the argument separator, the long macro end sequence, the string listing characters to stack, the string listing characters to unstack, the argument reference sequence, and finally the quote character. As explained below, these sequences should be supplied using the syntax of C strings; they must start with a non-alphanumeric character, and in the first five strings special matching sequences can be used (see below). If the argument corresponding to the quote character is the empty string, that argument's functionality is disabled. For meta-macro specifications there are only seven parameters, as the argument reference sequence and quote character are shared with the user macro syntax. $P$ The structure of a comment/string is as follows: it must start with a sequence of characters matching the given $I{comment/string start sequence}$, and always ends at the first occurrence of the $I{comment/string end sequence}$, unless it is preceded by an odd number of occurrences of the $I{string-quote character}$ (if such a character has been specified). In certain cases comment/strings can be specified to enable macro evaluation inside the comment/string; in that case, if a quote character has been defined for macros it can be used as well to prevent the comment/string from ending, with the difference that the macro quote character is always removed from output whereas the string-quote character is always output. Also note that under certain circumstances a comment/string specification can be $I{disabled}$, in which case the comment/string start sequence is simply ignored. Finally, it is possible to specify a $I{string warning character}$ whose presence inside a comment/string will cause GPP to output a warning (this is useful to locate unterminated strings in cpp mode). Note that input files are not allowed to contain unterminated comments/strings. $P$ A comment/string specification can be declared from within the input file using the $I{$dz$mode comment}$ meta-macro call (or equivalently $I{$dz$mode string}$), in which case the number of C strings to be given as arguments to describe the comment/string can be anywhere between two and four: the first two arguments (mandatory) are the start sequence and the end sequence, and can make use of the special matching sequences (see below). They may not start with alphanumeric characters. The first character of the third argument, if there is one, is used as the string-quote character (use an empty string to disable the functionality), and the first character of the fourth argument, if there is one, is used as the string-warning character. A specification may also be given from the command-line, in which case there must be two arguments if using the +c option and three if using the +s option. $P$ The behavior of a comment/string is specified by a three-character modifier string, which may be passed as an optional argument either to the +c/+s command-line options or to the $I{$dz$mode comment}$/$I{$dz$mode string}$ meta-macros. If no modifier string is specified, the default value is "ccc" for comments and "sss" for strings. The first character corresponds to the behavior inside meta-macro calls (including user-macro definitions since these come inside a $I{$dz$define}$ meta-macro call), the second character corresponds to the behavior inside user-macro parameters, and the third character corresponds to the behavior outside of any macro call. Each of these characters can take the following values: $list{ $li$ $bi{i}$ disable the comment/string specification. $li$ $bi{c}$ comment (neither evaluated nor output). $li$ $bi{s}$ string (the string and its delimiter sequences are output as-is). $li$ $bi{q}$ quoted string (the string is output as-is, without the delimiter sequences). $li$ $bi{C}$ evaluated comment (macros are evaluated, but output is discarded). $li$ $bi{S}$ evaluated string (macros are evaluated, delimiters are output). $li$ $bi{Q}$ evaluated quoted string (macros are evaluated, delimiters are not output).}$ $P$ Important note: any occurrence of a comment/string start sequence inside another comment/string is always ignored, even if macro evaluation is enabled. In other words, comments/strings cannot be nested. In particular, the `Q' modifier can be a convenient way of defining a syntax for temporarily disabling all comment and string specifications. $P$ Syntax specification strings should always be provided as C strings, whether they are given as arguments to a $I{$dz$mode}$ meta-macro call or on the command-line of a Unix shell. If command-line arguments are given via another method than a standard Unix shell, then the shell behavior must be emulated$mdash$$I{i.e.}$, the surrounding "" quotes should be removed, all occurrences of `$b$$b$' should be replaced by a single backslash, and similarly `$b$"' should be replaced by `"'. Sequences like `$b$n' are recognized by GPP and should be left as is. $P$ Special sequences matching certain subsets of the character set can be used. They are of the form `$b$$I{x}$', where $I{x}$ is one of: $list{ $li$ $bi{b}$ matches any sequence of one or more spaces or tab characters (`$b$b' is identical to `$nbsp$'). $li$ $bi{w}$ matches any sequence of zero or more spaces or tab characters. $li$ $bi{B}$ matches any sequence of one or more spaces, tabs or newline characters. $li$ $bi{W}$ matches any sequence of zero or more spaces, tabs or newline characters. $li$ $bi{a}$ an alphabetic character (`a' to `z' and `A' to `Z'). $li$ $bi{A}$ an alphabetic character, or a space, tab or newline. $li$ $bi{$dz$}$ a digit (`0' to `9'). $li$ $bi{i}$ an identifier character. The set of matched characters is customizable using the $I{$dz$mode charset id}$ command. The default setting matches alphanumeric characters and underscores (`a' to `z', `A' to `Z', `0' to `9' and `$und$'). $li$ $bi{t}$ a tab character. $li$ $bi{n}$ a newline character. $li$ $bi{o}$ an operator character. The set of matched characters is customizable using the $I{$dz$mode charset op}$ command. The default setting matches all characters in "+-*/$b$$exp$$l$$g$=`$tilde$:.?@$dz$$and$!$pc$$pipe$", except in Prolog mode where `!', `$pc$' and `$pipe$' are not matched. $li$ $bi{O}$ an operator character or a parenthesis character. The set of additional matched characters in comparison with `$b$o' is customizable using the $I{$dz$mode charset par}$ command. The default setting is to have the characters in "()[]$bra$$ket$" as parentheses.}$ $P$ Moreover, all of these matching subsets except `$b$w' and `$b$W' can be negated by inserting a `!'$mdash$$I{i.e.}$, by writing `$b$!$I{x}$' instead of `$b$$I{x}$'. $P$ Note an important distinctive feature of $I{start sequences}$: when the first character of a macro or comment/string start sequence is '$nbsp$' or one of the above special sequences, it is not taken to be part of the sequence itself but is used instead as a context check: for example a start sequence beginning with '$b$n' matches only at the beginning of a line, but the matching newline character is not taken to be part of the sequence. Similarly a start sequence beginning with '$nbsp$' matches only if some whitespace is present, but the matching whitespace is not considered to be part of the start sequence and is therefore sent to output. If a context check is performed at the very beginning of a file (or more generally of any body to be evaluated), the result is the same as matching with a newline character (this makes it possible for a cpp-mode file to start with a meta-macro call). $P$ Two special syntax rules were added in version 2.1. First, argument references ($dz$$I{n}$) are no longer evaluated when they are outside of macro calls and definitions. However, they are no longer allowed to appear (unless protected by quote characters) inside a call to a defined user macro; the current behavior (backwards compatible) is to remove them silently from the input if that happens. $P$ Second, if the end sequence (either for macros or comments) consists of a single newline character, and if delimitation rules lead to evaluation in a context where the final newline character is absent, GPP silently ignores the missing newline instead of producing an error. The main consequence is that meta-macro calls can now be nested in a simple way in standard, cpp and Prolog modes. %%%%%%%%%%%%%%%%%% evaluation rules %%%%%%%%%%%%%%%%%%%% $S{EVALUATION RULES}$ $P$ Input is read sequentially and interpreted according to the rules of the current mode. All input text is first matched against the specified comment/string start sequences of the current mode (except those which are disabled by the 'i' modifier), unless the body being evaluated is the contents of a comment/string whose modifier enables macro evaluation. The most recently defined comment/string specifications are checked for first. Important note: comments may not appear between the name of a macro and its arguments (doing so results in undefined behavior). $P$ Anything that is not a comment/string is then matched against a possible meta-macro call, and if that fails too, against a possible user-macro call. All remaining text undergoes substitution of argument reference sequences by the relevant argument text (empty unless the body being evaluated is the definition of a user macro) and removal of the quote character if there is one. $P$ Note that meta-macro arguments are passed to the meta-macro prior to any evaluation (although the meta-macro may choose to evaluate them, see meta-macro descriptions below). In the case of the $I{$dz$mode}$ meta-macro, GPP temporarily adds a comment/string specification to enable recognition of C strings ("$ldots$") and prevent any evaluation inside them, so no interference of the characters being put in the C string arguments to $I{$dz$mode}$ with the current syntax is to be feared. $P$ On the other hand, the arguments to a user macro are systematically evaluated, and then passed as context parameters to the macro definition body, which gets evaluated with that environment. The only exception is when the macro definition is empty, in which case its arguments are not evaluated. Note that GPP temporarily switches back to the mode in which the macro was defined in order to evaluate it, so it is perfectly safe to change the operating mode between the time a macro is defined and the time when it is called. Conversely, if a user macro wishes to work with the current mode instead of the one that was used to define it it needs to start with a $I{$dz$mode restore}$ call and end with a $I{$dz$mode save}$ call. $P$ A user macro may be defined with named arguments (see $I{$dz$define}$ description below). In that case, when the macro definition is being evaluated, each named parameter causes a temporary virtual user-macro definition to be created; such a macro may be called only without arguments and simply returns the text of the corresponding argument. $P$ Note that, since macros are evaluated when they are called rather than when they are defined, any attempt to call a recursive macro causes undefined behavior except in the very specific case when the macro uses $I{$dz$undef}$ to erase itself after finitely many loop iterations. $P$ Finally, a special case occurs when a user macro whose definition does not involve any arguments (neither named arguments nor the argument reference sequence) is called in a mode where the short user-macro end sequence is empty ($I{e.g.}$, cpp or $TeX$$nbsp$mode). In that case it is assumed to be an $I{alias macro}$: its arguments are first evaluated in the current mode as usual, but instead of being passed to the macro definition as parameters (which would cause them to be discarded) they are actually appended to the macro definition, using the syntax rules of the mode in which the macro was defined, and the resulting text is evaluated again. It is therefore important to note that, in the case of a macro alias, the arguments actually get evaluated twice in two potentially different modes. %%% %%%%%%%%%%%%%%%%%%%%% meta-macro descriptions %%%%%%%%%%%%%%%%%%%%%% $S{META-MACROS}$ $P$ These macros are always predefined. Their actual calling sequence depends on the current mode; here we use cpp-like notation. $list{ $li$ $BI{$dz$define }{x y}$ This defines the user macro $I{x}$ as $I{y}$. $I{y}$ can be any valid GPP input, and may for example refer to other macros. $I{x}$ must be an identifier ($I{i.e.}$, a sequence of alphanumeric characters and '$und$'), unless named arguments are specified. If $I{x}$ is already defined, the previous definition is overwritten. If no second argument is given, $I{x}$ will be defined as a macro that outputs nothing. Neither $I{x}$ nor $I{y}$ are evaluated; the macro definition is only evaluated when it is called, not when it is declared. $p$ It is also possible to name the arguments in a macro definition: in that case, the argument $I{x}$ should be a user-macro call whose arguments are all identifiers. These identifiers become available as user-macros inside the macro definition; these virtual macros must be called without arguments, and evaluate to the corresponding macro parameter. $li$ $BI{$dz$defeval }{x y}$ This acts in a similar way to $I{$dz$define}$, but the second argument $I{y}$ is evaluated immediately. Since user macro definitions are also evaluated each time they are called, this means that the macro $I{y}$ will undergo $I{two}$ successive evaluations. The usefulness of $I{$dz$defeval}$ is considerable as it is the only way to evaluate something more than once, which may be needed to force evaluation of the arguments of a meta-macro that normally doesn't perform any evaluation. However since all argument references evaluated at define-time are understood as the arguments of the body in which the macro is being defined and not as the arguments of the macro itself, usually one has to use the quote character to prevent immediate evaluation of argument references. $li$ $BI{$dz$undef }{x}$ This removes any existing definition of the user macro $I{x}$. $li$ $BI{$dz$ifdef }{x}$ This begins a conditional block. Everything that follows is evaluated only if the identifier $I{x}$ is defined, and until either a $I{$dz$else}$ or a $I{$dz$endif}$ statement is reached. Note, however, that the commented text is still scanned thoroughly, so its syntax must be valid. It is in particular legal to have the $I{$dz$else}$ or $I{$dz$endif}$ statement ending the conditional block appear only as the result of a user-macro expansion and not explicitly in the input. $li$ $BI{$dz$ifndef }{x}$ This begins a conditional block. Everything that follows is evaluated only if the identifier $I{x}$ is not defined. $li$ $BI{$dz$ifeq }{x y}$ This begins a conditional block. Everything that follows is evaluated only if the results of the evaluations of $I{x}$ and $I{y}$ are identical as character strings. Any leading or trailing whitespace is ignored for the comparison. Note that in cpp-mode any unquoted whitespace character is understood as the end of the first argument, so it is necessary to be careful. $li$ $BI{$dz$ifneq }{x y}$ This begins a conditional block. Everything that follows is evaluated only if the results of the evaluations of $I{x}$ and $I{y}$ are not identical (even up to leading or trailing whitespace). $li$ $BI{$dz$else}$ This toggles the logical value of the current conditional block. What follows is evaluated if and only if the preceding input was commented out. $li$ $BI{$dz$endif}$ This ends a conditional block started by a $I{$dz$if$ldots$}$ meta-macro. $li$ $BI{$dz$include }{file}$ This causes GPP to open the specified file and evaluate its contents, inserting the resulting text in the current output. All defined user macros are still available in the included file, and reciprocally all macros defined in the included file will be available in everything that follows. The include file is looked for first in the current directory, and then, if not found, in one of the directories specified by the $I{$d$I}$ command-line option (or $I{/usr/include}$ if no directory was specified). Note that, for compatibility reasons, it is possible to put the file name between "" or $l$$g$. $p$ The order in which the various directories are searched for include files is affected by the $I{$d$nostdinc}$, $I{$d$nocurinc}$ and $I{$d$curdirinclast}$ command-line options. $p$ Upon including a file, GPP immediately saves a copy of the current operating mode onto the mode stack, and restores the operating mode at the end of the included file. The included file may override this behavior by starting with a $I{$dz$mode restore}$ call and ending with a $I{$dz$mode push}$ call. Additionally, when the $I{$d$m}$ command line option is specified, GPP will automatically switch to the cpp compatibility mode upon including a file whose name ends with either '.c' or '.h'. $li$ $BI{$dz$exec }{command}$ This causes GPP to execute the specified command line and include its standard output in the current output. Note that, for security reasons, this meta-macro is disabled unless the $I{$d$x}$ command line flag was specified. If use of $I{$dz$exec}$ is not allowed, a warning message is printed and the output is left blank. Note that the specified command line is evaluated before being executed, thus allowing the use of macros in the command-line. However, the output of the command is included verbatim and not evaluated. If you need the output to be evaluated, you must use $I{$dz$defeval}$ (see above) to cause a double evaluation. $li$ $BI{$dz$eval }{expr}$ The $I{$dz$eval}$ meta-macro attempts to evaluate $I{expr}$ first by expanding macros (normal GPP evaluation) and then by performing arithmetic evaluation and/or wildcard matching. The syntax and operator precedence for arithmetic expressions are the same as in C; the only missing operators are $l$$l$, $g$$g$, ?:, and the assignment operators. $p$ POSIX-style wildcard matching ('globbing') is available only on POSIX implementations and can be invoked with the =$tilde$ operator. In brief, a '?' matches any single character, a '*' matches any string (including the empty string), and '[$ldots$]' matches any one of the characters enclosed in brackets. A '[$ldots$]' class is complemented when the first character in the brackets is '!'. The characters in a '[$ldots$]' class can also be specified as a range using the '$d$' character$mdash$$I{e.g.}$, '[F$d$N]' is equivalent to '[FGHIJKLMN]'. $p$ If unable to assign a numerical value to the result, the returned text is simply the result of macro expansion without any arithmetic evaluation. The only exceptions to this rule are the comparison operators ==, !=, $l$, $g$, $l$=, and $g$= which, if one of the sides does not evaluate to a number, perform string comparison instead (ignoring trailing and leading spaces). Additionally, the $I{length($ldots$)}$ arithmetic operator returns the length in characters of its evaluated argument. $p$ Inside arithmetic expressions, the $I{defined($ldots$)}$ special user macro is also available: it takes only one argument, which is not evaluated, and returns 1 if it is the name of a user macro and 0 otherwise. $li$ $BI{$dz$if }{expr}$ This meta-macro invokes the arithmetic/globbing evaluator in the same manner as $I{$dz$eval}$ and compares the result of evaluation with the string "0" in order to begin a conditional block. In particular note that the logical value of $I{expr}$ is always true when it cannot be evaluated to a number. $li$ $BI{$dz$elif }{expr}$ This meta-macro can be used to avoid nested $I{$dz$if}$ conditions. $I{$dz$if}$ $ldots$ $I{$dz$elif}$ $ldots$ $I{$dz$endif}$ is equivalent to $I{$dz$if}$ $ldots$ $I{$dz$else}$ $I{$dz$if}$ $ldots$ $I{$dz$endif}$ $I{$dz$endif}$. $li$ $BI{$dz$mode }{keyword $ldots$}$ This meta-macro controls GPP's operating mode. See below for a list of $I{$dz$mode}$ commands. $li$ $BI{$dz$line}$ This meta-macro evaluates to the line number of the current input file. $li$ $BI{$dz$file}$ This meta-macro evaluates to the filename of the current input file as it appears on the command line or in the argument to $I{$dz$include}$. If GPP is reading its input from stdin, then $I{$dz$file}$ evaluates to `stdin'. $li$ $BI{$dz$date }{fmt}$ This meta-macro evaluates to the current date and time as formatted by the specified format string $I{fmt}$. See the section $I{DATE AND TIME CONVERSION SPECIFIERS}$ below. $li$ $BI{$dz$error }{msg}$ This meta-macro causes an error message with the current filename and line number, and with the text $I{msg}$, to be printed to the standard error device. Subsequent processing is then aborted. $li$ $BI{$dz$warning }{msg}$ This meta-macro causes a warning message with the current filename and line number, and with the text $I{msg}$, to be printed to the standard error device. Subsequent processing is then resumed. }$ $P$ The key to GPP's flexibility is the $I{$dz$mode}$ meta-macro. Its first argument is always one of a list of available keywords (see below); its second argument is always a sequence of words separated by whitespace. Apart from possibly the first of them, each of these words is always a delimiter or syntax specifier, and should be provided as a C string delimited by double quotes ("$nbsp$"). The various special matching sequences listed in the section on syntax specification are available. Any $I{$dz$mode}$ command is parsed in a mode where "$ldots$" is understood to be a C-style string, so it is safe to put any character inside these strings. Also note that the first argument of $I{$dz$mode}$ (the keyword) is never evaluated, while the second argument is evaluated (except of course for the contents of C strings), so that the syntax specification may be obtained as the result of a macro evaluation. $P$ The available $I{$dz$mode}$ commands are: $list{ $li$ $BI{$dz$mode save / $dz$mode push}$ Push the current mode specification onto the mode stack. $li$ $BI{$dz$mode restore / $dz$mode pop}$ Pop mode specification from the mode stack. $li$ $BI{$dz$mode standard }{name}$ Select one of the standard modes. The only argument must be one of: default (default mode); cpp, C (cpp mode); tex, $TeX$$nbsp$(tex mode); html, HTML (html mode); xhtml, XHTML (xhtml mode); prolog, Prolog (prolog mode). The mode name must be given directly, not as a C string. $li$ $BI{$dz$mode user }{$s{s1}$ $ldots$ $s{s9}$}$ Specify user macro syntax. The 9 arguments, all of them C strings, are the mode specification for user macros (see the $d$U command-line option and the section on syntax specification). The meta-macro specification is not affected. $li$ $BI{$dz$mode meta }{$bra$user $pipe$ $s{s1}$ $ldots$ $s{s7}$$ket$}$ Specify meta-macro syntax. Either the only argument is $I{user}$ (not as a string), and the user-macro mode specifications are copied into the meta-macro mode specifications, or there must be seven string arguments, whose significance is the same as for the $d$M command-line option (see section on syntax specification). $li$ $BI{$dz$mode quote }{[$s{c}$]}$ With no argument or "" as argument, removes the quote character specification and disables the quoting functionality. With one string argument, the first character of the string is taken to be the new quote character. The quote character can be neither alphanumeric nor '$und$', nor can it be one of the special matching sequences. $li$ $BI{$dz$mode comment }{[xxx] $s{start}$ $s{end}$ [$s{c}$ [$s{c}$]]}$ Add a comment specification. Optionally a first argument consisting of three characters not enclosed in "$nbsp$" can be used to specify a comment/string modifier (see the section on syntax specification). The default modifier is $I{ccc}$. The first two string arguments are used as comment start and end sequences respectively. The third string argument is optional and can be used to specify a string-quote character. (If it is "", the functionality is disabled.) The fourth string argument is optional and can be used to specify a string delimitation warning character. (If it is "", the functionality is disabled.) $li$ $BI{$dz$mode string }{[xxx] $s{start}$ $s{end}$ [$s{c}$ [$s{c}$]]}$ Add a string specification. Identical to $I{$dz$mode comment}$ except that the default modifier is $I{sss}$. $li$ $BI{$dz$mode nocomment / $dz$mode nostring }{[$s{start}$]}$ With no argument, remove all comment/string specifications. With one string argument, delete the comment/string specification whose start sequence is the argument. $li$ $BI{$dz$mode preservelf }{$bra$ on $pipe$ off $pipe$ 1 $pipe$ 0 $ket$}$ Equivalent to the $I{-n}$ command-line switch. If the argument is $I{on}$ or $I{1}$, any newline or whitespace character terminating a macro call or a comment/string is left in the input stream for further processing. If the argument is $I{off}$ or $I{0}$ this feature is disabled. $li$ $BI{$dz$mode charset }{$bra$ id $pipe$ op $pipe$ par $ket$ $s{string}$}$ Specify the character sets to be used for matching the $b$o, $b$O and $b$i special sequences. The first argument must be one of $I{id}$ (the set matched by $b$i), $I{op}$ (the set matched by $b$o) or $I{par}$ (the set matched by $b$O in addition to the one matched by $b$o). $I{"string"}$ is a C string which lists all characters to put in the set. It may contain only the special matching sequences $b$a, $b$A, $b$b, $b$B, and $b$$dz$ (the other sequences and the negated sequences are not allowed). When a '-' is found inbetween two non-special characters this adds all characters inbetween (e.g. "A-Z" corresponds to all uppercase characters). To have '-' in the matched set, either put it in first or last position or place it next to a $b$x sequence. }$ $S{DATE AND TIME CONVERSION SPECIFIERS}$ Ordinary characters placed in the format string are copied to without conversion. Conversion specifiers are introduced by a `$pc$' character, and are replaced as follows: $list{ $li$ $BI{$pc$a}$ The abbreviated weekday name according to the current locale. $li$ $BI{$pc$A}$ The full weekday name according to the current locale. $li$ $BI{$pc$b}$ The abbreviated month name according to the current locale. $li$ $BI{$pc$B}$ The full month name according to the current locale. $li$ $BI{$pc$c}$ The preferred date and time representation for the current locale. $li$ $BI{$pc$d}$ The day of the month as a decimal number (range 01 to 31). $li$ $BI{$pc$F}$ Equivalent to $pc$Y-$pc$m-$pc$d (the ISO 8601 date format). $li$ $BI{$pc$H}$ The hour as a decimal number using a 24-hour clock (range 00 to 23). $li$ $BI{$pc$I}$ The hour as a decimal number using a 12-hour clock (range 01 to 12). $li$ $BI{$pc$j}$ The day of the year as a decimal number (range 001 to 366). $li$ $BI{$pc$m}$ The month as a decimal number (range 01 to 12). $li$ $BI{$pc$M}$ The minute as a decimal number (range 00 to 59). $li$ $BI{$pc$p}$ Either `AM' or `PM' according to the given time value, or the corresponding strings for the current locale. Noon is treated as `pm' and midnight as `am'. $li$ $BI{$pc$R}$ The time in 24-hour notation ($pc$H:$pc$M). $li$ $BI{$pc$S}$ The second as a decimal number (range 00 to 61). $li$ $BI{$pc$U}$ The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01. $li$ $BI{$pc$w}$ The day of the week as a decimal, range 0 to 6, Sunday being 0. $li$ $BI{$pc$W}$ The week number of the current year as a decimal number, range 00 to 53, starting with the first Monday as the first day of week 01. $li$ $BI{$pc$x}$ The preferred date representation for the current locale without the time. $li$ $BI{$pc$X}$ The preferred time representation for the current locale without the date. $li$ $BI{$pc$y}$ The year as a decimal number without a century (range 00 to 99). $li$ $BI{$pc$Y}$ The year as a decimal number including the century. $li$ $BI{$pc$Z}$ The time zone or name or abbreviation. $li$ $BI{$pc$$pc$}$ A literal `$pc$' character. }$ $P$ Depending on the C compiler and library used to compile GPP, there may be more conversion specifiers available. Consult your compiler's documentation for the $I{strftime()}$ function. Note, however, that any conversion specifiers not listed above may not be portable across installations of GPP. $S{EXAMPLES}$ Here is a basic self-explanatory example in standard or cpp mode: $pre$ $dz$define FOO This is $dz$define BAR a message. $dz$define concat $dz$1 $dz$2 concat(FOO,BAR) $dz$ifeq (concat(foo,bar)) (foo bar) This is output. $dz$else This is not output. $dz$endif $nopre$ Using argument naming, the $I{concat}$ macro could alternatively be defined as $pre$ $dz$define concat(x,y) x y $nopre$ In $TeX$$nbsp$mode and using argument naming, the same example becomes: $pre$ $b$define$bra$FOO$ket$$bra$This is$ket$ $b$define$bra$BAR$ket$$bra$a message.$ket$ $b$define$bra$$b$concat$bra$x$ket$$bra$y$ket$$ket$$bra$$b$x $b$y$ket$ $b$concat$bra$$b$FOO$ket$$bra$$b$BAR$ket$ $b$ifeq$bra$$b$concat$bra$foo$ket$$bra$bar$ket$$ket$$bra$foo bar$ket$ This is output. $b$else This is not output. $b$endif $nopre$ In HTML mode and without argument naming, one gets similarly: $pre$ $l$$dz$define FOO$pipe$This is$g$ $l$$dz$define BAR$pipe$a message.$g$ $l$$dz$define concat$pipe$$dz$1 $dz$2$g$ $l$$dz$concat $l$$dz$FOO$g$$pipe$$l$$dz$BAR$g$$g$ $l$$dz$ifeq $l$$dz$concat foo$pipe$bar$g$$pipe$foo bar$g$ This is output. $l$$dz$else$g$ This is not output. $l$$dz$endif$g$ $nopre$ The following example (in standard mode) illustrates the use of the quote character: $pre$ $dz$define FOO This is $b$ a multiline definition. $dz$define BLAH(x) My argument is x BLAH(urf) $b$BLAH(urf) $nopre$ Note that the multiline definition is also valid in cpp and Prolog modes despite the absence of quote character, because '$b$' followed by a newline is then interpreted as a comment and discarded. $P$ In cpp mode, C strings and comments are understood as such, as illustrated by the following example: $pre$ $dz$define BLAH foo BLAH "BLAH" /* BLAH */ 'It$b$'s a /*string*/ !' $nopre$ The main difference between Prolog mode and cpp mode is the handling of strings and comments: in Prolog, a '$ldots$' string may not begin immediately after a digit, and a /*$ldots$*/ comment may not begin immediately after an operator character. Furthermore, comments are not removed from the output unless they occur in a $dz$command. $P$ The differences between cpp mode and default mode are deeper: in default mode $dz$commands may start anywhere, while in cpp mode they must be at the beginning of a line; the default mode has no knowledge of comments and strings, but has a quote character ('$b$'), while cpp mode has extensive comment/string specifications but no quote character. Moreover, the arguments to meta-macros need to be correctly parenthesized in default mode, while no such checking is performed in cpp mode. $P$ This makes it easier to nest meta-macro calls in default mode than in cpp mode. For example, consider the following HTML mode input, which tests for the availability of the $I{$dz$exec}$ command: $pre$ $l$$dz$ifeq $l$$dz$exec echo blah$g$$pipe$blah $g$ $dz$exec allowed $l$$dz$else$g$ $dz$exec not allowed $l$$dz$endif$g$ $nopre$ There is no cpp mode equivalent, while in default mode it can be easily translated as $pre$ $dz$ifeq ($dz$exec echo blah ) (blah ) $b$$dz$exec allowed $dz$else $b$$dz$exec not allowed $dz$endif $nopre$ In order to nest meta-macro calls in cpp mode it is necessary to modify the mode description, either by changing the meta-macro call syntax, or more elegantly by defining a silent string and using the fact that the context at the beginning of an evaluated string is a newline character: $pre$ $dz$mode string QQQ "$dollar$" "$dollar$" $dz$ifeq $dollar$$dz$exec echo blah $dollar$ $dollar$blah $dollar$ $b$$dz$exec allowed $dz$else $b$$dz$exec not allowed $dz$endif $nopre$ Note, however, that comments/strings cannot be nested ("$ldots$" inside $dollar$$ldots$$dollar$ would go undetected), so one needs to be careful about what to include inside such a silent evaluated string. In this example, the loose meta-macro nesting introduced in version 2.1 makes it possible to use the following simpler version: $pre$ $dz$ifeq blah #exec echo -n blah $b$$dz$exec allowed $dz$else $b$$dz$exec not allowed $dz$endif $nopre$ Remember that macros without arguments are actually understood to be aliases when they are called with arguments, as illustrated by the following example (default or cpp mode): $pre$ $dz$define DUP(x) x x $dz$define FOO and I said: DUP FOO(blah) $nopre$ The usefulness of the $I{$dz$defeval}$ meta-macro is shown by the following example in HTML mode: $pre$ $l$$dz$define APPLY$pipe$$l$$dz$defeval TEMP$pipe$$l$$b$$dz$$dz$1 $b$$dz$1$g$$g$$l$$dz$TEMP $dz$2$g$$g$ $l$$dz$define $l$$dz$foo x$g$$pipe$$l$$dz$x$g$ and $l$$dz$x$g$$g$ $l$$dz$APPLY foo$pipe$BLAH$g$ $nopre$ The reason why $I{$dz$defeval}$ is needed is that, since everything is evaluated in a single pass, the input that will result in the desired macro call needs to be generated by a first evaluation of the arguments passed to APPLY before being evaluated a second time. $P$ To translate this example in default mode, one needs to resort to parenthesizing in order to nest the $dz$defeval call inside the definition of APPLY, but need to do so without outputting the parentheses. The easiest solution is $pre$ $dz$define BALANCE(x) x $dz$define APPLY(f,v) BALANCE($dz$defeval TEMP f TEMP(v)) $dz$define foo(x) x and x APPLY($b$foo,BLAH) $nopre$ As explained above the simplest version in cpp mode relies on defining a silent evaluated string to play the role of the BALANCE macro. $P$ The following example (default or cpp mode) demonstrates arithmetic evaluation: $pre$ $dz$define x 4 The answer is: $dz$eval x*x + 2*(16-x) + 1998$pc$x $dz$if defined(x)$and$$and$!(3*x+5$g$17) This should be output. $dz$endif $nopre$ To finish, here are some examples involving mode switching. The following example is self-explanatory (starting in default mode): $pre$ $dz$mode push $dz$define f(x) x x $dz$mode standard tex $b$f$bra$blah$ket$ $b$mode$bra$string$ket$$bra$"$dollar$" "$dollar$"$ket$ $b$mode$bra$comment$ket$$bra$"/*" "*/"$ket$ $dollar$$b$f$bra$urf$ket$$dollar$ /* blah */ $b$define$bra$FOO$ket$$bra$bar/* and some more */$ket$ $b$mode$bra$pop$ket$ f($dollar$FOO$dollar$) $nopre$ A good example where a user-defined mode becomes useful is the GPP source of this document (available with GPP's source code distribution). $P$ Another interesting application is selectively forcing evaluation of macros in C strings when in cpp mode. For example, consider the following input: $pre$ $dz$define blah(x) "and he said: x" blah(foo) $nopre$ Obviously one would want the parameter $I{x}$ to be expanded inside the string. There are several ways around this problem: $pre$ $dz$mode push $dz$mode nostring "$b$"" $dz$define blah(x) "and he said: x" $dz$mode pop $dz$mode quote "`" $dz$define blah(x) `"and he said: x`" $dz$mode string QQQ "$dollar$$dollar$" "$dollar$$dollar$" $dz$define blah(x) $dollar$$dollar$"and he said: x"$dollar$$dollar$ $nopre$ The first method is very natural, but has the inconvenience of being lengthy and neutralizing string semantics, so that having an unevaluated instance of 'x' in the string, or an occurrence of '/*', would be impossible without resorting to further contortions. $P$ The second method is slightly more efficient because the local presence of a quote character makes it easier to control what is evaluated and what isn't, but has the drawback that it is sometimes impossible to find a reasonable quote character without having to either significantly alter the source file or enclose it inside a $I{$dz$mode push/pop}$ construct. For example, any occurrence of '/*' in the string would have to be quoted.$P$ The last method demonstrates the efficiency of evaluated strings in the context of selective evaluation: since comments/strings cannot be nested, any occurrence of '"' or '/*' inside the '$dollar$$dollar$' gets output as plain text, as expected inside a string, and only macro evaluation is enabled. Also note that there is much more freedom in the choice of a string delimiter than in the choice of a quote character. $P$ Starting with version 2.1, meta-macro calls can be nested more efficiently in default, cpp and Prolog modes. This makes it easy to make a user version of a meta-macro, or to increment a counter: $pre$ $dz$define myeval $dz$eval $dz$1 $dz$define x 1 $dz$defeval x $dz$eval x+1 $nopre$ %%% %%%%%%%%%%%%%%%%%%%%%% advanced examples %%%%%%%%%%%%%%%%%%%%%%%%%%%% $S{ADVANCED EXAMPLES}$ $P$ Here are some examples of advanced constructions using GPP. They tend to be pretty awkward and should be considered as evidence of GPP's limitations. $P$ The first example is a recursive macro. The main problem is that (since GPP evaluates everything) a recursive macro must be very careful about the way in which recursion is terminated in order to avoid undefined behavior (most of the time GPP will simply crash). In particular, relying on a $I{$dz$if/$dz$else/$dz$endif}$ construct to end recursion is not possible and results in an infinite loop, because GPP scans user macro calls even in the unevaluated branch of the conditional block. A safe way to proceed is for example as follows (we give the example in $TeX$$nbsp$mode): $pre$ $b$define$bra$countdown$ket$$bra$ $b$if$bra$$dz$1$ket$ $dz$1... $b$define$bra$loop$ket$$bra$$b$countdown$ket$ $b$else Done. $b$define$bra$loop$ket$$bra$$ket$ $b$endif $b$loop$bra$$b$eval$bra$$dz$1-1$ket$$ket$ $ket$ $b$countdown$bra$10$ket$ $nopre$$P$ Another example, in cpp mode: $pre$ $dz$mode string QQQ "$dollar$" "$dollar$" $dz$define triangle(x,y) y $b$ $dollar$$dz$if length(y)$l$x$dollar$ $dollar$$dz$define iter triangle$dollar$ $dollar$$dz$else$dollar$ $b$ $dollar$$dz$define iter$dollar$ $dollar$$dz$endif $dollar$ iter(x,*y) triangle(20) $nopre$$P$ The following is an (unfortunately very weak) attempt at implementing functional abstraction in GPP (in standard mode). Understanding this example and why it can't be made much simpler is an exercise left to the curious reader. $pre$ $dz$mode string "`" "`" "$b$$b$" $dz$define ASIS(x) x $dz$define SILENT(x) ASIS() $dz$define EVAL(x,f,v) SILENT( $dz$mode string QQQ "`" "`" "$b$$b$" $dz$defeval TEMP0 x $dz$defeval TEMP1 ( $b$$dz$define $b$TEMP2(TEMP0) f ) TEMP1 )TEMP2(v) $dz$define LAMBDA(x,f,v) SILENT( $dz$ifneq (v) () $dz$define TEMP3(a,b,c) EVAL(a,b,c) $dz$else $dz$define TEMP3(a,b,c) $b$LAMBDA(a,b) $dz$endif )TEMP3(x,f,v) $dz$define EVALAMBDA(x,y) SILENT( $dz$defeval TEMP4 x $dz$defeval TEMP5 y ) $dz$define APPLY(f,v) SILENT( $dz$defeval TEMP6 ASIS($b$EVA)f TEMP6 )EVAL(TEMP4,TEMP5,v) $nopre$ This yields the following results: $pre$ LAMBDA(z,z+z) =$g$ LAMBDA(z,z+z) LAMBDA(z,z+z,2) =$g$ 2+2 $dz$define f LAMBDA(y,y*y) f =$g$ LAMBDA(y,y*y) APPLY(f,blah) =$g$ blah*blah APPLY(LAMBDA(t,t t),(t t)) =$g$ (t t) (t t) LAMBDA(x,APPLY(f,(x+x)),urf) =$g$ (urf+urf)*(urf+urf) APPLY(APPLY(LAMBDA(x,LAMBDA(y,x*y)),foo),bar) =$g$ foo*bar $dz$define test LAMBDA(y,`$dz$ifeq y urf y is urf$dz$else y is not urf$dz$endif `) APPLY(test,urf) =$g$ urf is urf APPLY(test,foo) =$g$ foo is not urf $nopre$ %%%%%%%%%%%%%%%%%%%%%% misc stuff at the end %%%%%%%%%%%%%%%%%%%%%%%% $ifdef{man}$ $S{SEE ALSO}$ strftime(3), glob(7), m4(1V), cpp(1)$P$ GPP home page: http://www.nothingisreal.com/gpp/ $endif$ $S{AUTHOR}$ GPP was written by Denis Auroux $l$auroux@math.mit.edu$g$. Since version 2.12 it has been maintained by Tristan Miller $l$psychonaut@nothingisreal.com$g$. $S{COPYRIGHT}$ Copyright $copy$$nbsp$1996$ndash$2001 Denis Auroux.$BR$ Copyright $copy$$nbsp$2003, 2004 Tristan Miller.$P$ Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and this permission notice are preserved, thus giving the recipient permission to redistribute in turn.$P$ Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last changed them. $ifdef{html}$ $endif$ $ifdef{latex}$ \end{document} $endif$ %%% !!! gpp-2.24/doc/gpp.html0000644000076400001440000015130610123364566010145 GPP 2.24 — Generic Preprocessor

    GPP 2.24 — Generic Preprocessor

    N.B. — The latest version of GPP and this manual are available from the GPP home page.

    DESCRIPTION

    GPP is a general-purpose preprocessor with customizable syntax, suitable for a wide range of preprocessing tasks. Its independence from any programming language makes it much more versatile than cpp, while its syntax is lighter and more flexible than that of m4.

    GPP is targeted at all common preprocessing tasks where cpp is not suitable and where no very sophisticated features are needed. In order to be able to process equally efficiently text files or source code in a variety of languages, the syntax used by GPP is fully customizable. The handling of comments and strings is especially advanced.

    Initially, GPP only understands a minimal set of built-in macros, called meta-macros. These meta-macros allow the definition of user macros as well as some basic operations forming the core of the preprocessing system, including conditional tests, arithmetic evaluation, wildcard matching (globbing), and syntax specification. All user macro definitions are global—i.e., they remain valid until explicitly removed; meta-macros cannot be redefined. With each user macro definition GPP keeps track of the corresponding syntax specification so that a macro can be safely invoked regardless of any subsequent change in operating mode.

    In addition to macros, GPP understands comments and strings, whose syntax and behavior can be widely customized to fit any particular purpose. Internally comments and strings are the same construction, so everything that applies to comments applies to strings as well.

    SYNTAX

      gpp [-{o|O} outfile] [-I/include/path] [-Dname=val ...]
      [-z|+z] [-x] [-m] [-C|-T|-H|-X|-P|-U ... [-M ...]]
      [-n|+n] [+c<n> str1 str2] [+s<n> str1 str2 c] 
      [-c str1] [--nostdinc] [--nocurinc]
      [--curdirinclast] [--warninglevel n]
      [--includemarker str] [--include file]
      [infile]

  gpp --help

  gpp --version

    OPTIONS

    GPP recognizes the following command-line switches and options. Note that the -nostdinc, -nocurinc, -curdirinclast, -warninglevel, and -includemarker options from version 2.1 and earlier are deprecated and should not be used. Use the "long option" variants instead (--nostdinc, etc.).

    • -h --help
      Print a short help message.

    • --version
      Print version information.

    • -o outfile
      Specify a file to which all output should be sent (by default, everything is sent to standard output).

    • -O outfile
      Specify a file to which all output should be sent; output is simultanously sent to stdout.

    • -I/include/path
      Specify a path where the #include meta-macro will look for include files if they are not present in the current directory. The default is /usr/include if no -I option is specified. Multiple -I options may be specified to look in several directories.

    • -Dname=val
      Define the user macro name as equal to val. This is strictly equivalent to using the #define meta-macro, but makes it possible to define macros from the command-line. If val makes references to arguments or other macros, it should conform to the syntax of the mode specified on the command-line. Starting with version 2.1, macro argument naming is allowed on the command-line. The syntax is as follows: -Dmacro(arg1,…)=definition. The arguments are specified in C-style syntax, without any whitespace, but the definition should still conform to the syntax of the mode specified on the command-line.

    • +z
      Set text mode to Unix mode (LF terminator). Any CR character in the input is systematically discarded. This is the default under Unix systems.

    • -z
      Set text mode to DOS mode (CR–LF terminator). In this mode all CR characters are removed from the input, and all output LF characters are converted to CR–LF. This is the default if GPP is compiled with the WIN_NT option.

    • -x
      Enable the use of the #exec meta-macro. Since #exec includes the output of an arbitrary shell command line, it may cause a potential security threat, and is thus disabled unless this option is specified.

    • -m
      Enable automatic mode switching to the cpp compatibility mode if the name of an included file ends in `.h' or `.c'. This makes it possible to include C header files with only minor modifications.

    • -n
      Prevent newline or whitespace characters from being removed from the input when they occur as the end of a macro call or of a comment. By default, when a newline or whitespace character forms the end of a macro or a comment it is parsed as part of the macro call or comment and therefore removed from output. Use the -n option to keep the last character in the input stream if it was whitespace or a newline. This is activated in cpp and Prolog modes.

    • +n
      The opposite of -n. This is the default in all modes except cpp and Prolog. Note that +n must be placed after -C or -P in order to have any effect.

    • -U arg1 … arg9
      User-defined mode. The nine following command-line arguments are taken to be respectively the macro start sequence, the macro end sequence for a call without arguments, the argument start sequence, the argument separator, the argument end sequence, the list of characters to stack for argument balancing, the list of characters to unstack, the string to be used for referring to an argument by number, and finally the quote character (if there is none an empty string should be provided). These settings apply both to user macros and to meta-macros, unless the -M option is used to define other settings for meta-macros. See the section on syntax specification for more details.

    • -M arg1 … arg7
      User-defined mode specifications for meta-macros. This option can only be used together with -M. The seven following command-line arguments are taken to be respectively the macro start sequence, the macro end sequence for a call without arguments, the argument start sequence, the argument separator, the argument end sequence, the list of characters to stack for argument balancing, and the list of characters to unstack. See below for more details.

    • (default mode)
      The default mode is a vaguely cpp-like mode, but it does not handle comments, and presents various incompatibilities with cpp. Typical meta-macros and user macros look like this: 
        #define x y
  macro(arg,...)
      This mode is equivalent to 
        -U "" "" "(" "," ")" "(" ")" "#" "\\"
  -M "#" "\n" " " " " "\n" "(" ")"

    • -C
      cpp compatibility mode. This is the mode where GPP's behavior is the closest to that of cpp. Unlike in the default mode, meta-macro expansion occurs only at the beginning of lines, and C comments and strings are understood. This mode is equivalent to 
        -n -U "" "" "(" "," ")" "(" ")" "#" ""
  -M "\n#\w" "\n" " " " " "\n" "" ""
  +c "/*" "*/" +c "//" "\n" +c "\\\n" ""
  +s "\"" "\"" "\\" +s "'" "'" "\\"

    • -T
      TeX-like mode. In this mode, typical meta-macros and user macros look like this: 
        \define{x}{y}
  \macro{arg}{...}
      No comments are understood. This mode is equivalent to 
        -U "\\" "" "{" "}{" "}" "{" "}" "#" "@"

    • -H
      HTML-like mode. In this mode, typical meta-macros and user macros look like this: 
        <#define x|y>
  <#macro arg|...>
      No comments are understood. This mode is equivalent to 
        -U "<#" ">" "\B" "|" ">" "<" ">" "#" "\\"

    • -X
      XHTML-like mode. In this mode, typical meta-macros and user macros look like this: 
        <#define x|y/>
  <#macro arg|.../>
      No comments are understood. This mode is equivalent to 
        -U "<#" "/>" "\B" "|" "/>" "<" ">" "#" "\\"

    • -P
      Prolog-compatible cpp-like mode. This mode differs from the cpp compatibility mode by its handling of comments, and is equivalent to 
        -n -U "" "" "(" "," ")" "(" ")" "#" ""
  -M "\n#\w" "\n" " " " " "\n" "" ""
  +ccss "\!o/*" "*/" +ccss "%" "\n" +ccii "\\\n" ""
  +s "\"" "\"" "" +s "\!#'" "'" ""

    • +c<n> str1 str2
      Specify comments. Any unquoted occurrence of str1 will be interpreted as the beginning of a comment. All input up to the first following occurrence of str2 will be discarded. This option may be used multiple times to specify different types of comment delimiters. The optional parameter <n> can be specified to alter the behavior of the comment and, e.g., turn it into a string or make it ignored under certain circumstances, see below.

    • -c str1
      Un-specify comments or strings. The comment/string specification whose start sequence is str1 is removed. This is useful to alter the built-in comment specifications of a standard mode—e.g., the cpp compatibility mode.

    • +s<n> str1 str2 c
      Specify strings. Any unquoted occurrence of str1 will be interpreted as the beginning of a string. All input up to the first following occurrence of str2 will be output as is without any evaluation. The delimiters themselves are output. If c is non-empty, its first character is used as a string-quote character—i.e., a character whose presence immediately before an occurrence of str2 prevents it from terminating the string. The optional parameter <n> can be specified to alter the behavior of the string and, e.g., turn it into a comment, enable macro evaluation inside the string, or make the string specification ignored under certain circumstances. See below.

    • -s str1
      Un-specify comments or strings. Identical to -c.

    • --include file
      Process file before infile

    • --nostdinc
      Do not look for include files in the standard directory /usr/include.

    • --nocurinc
      Do not look for include files in the current directory.

    • --curdirinclast
      Look for include files in the current directory after the directories specified by -I rather than before them.

    • --warninglevel n
      Set warning level to n (0, 1 or 2). Default is 2 (most verbose).

    • --includemarker str
      keep track of #include directives by inserting a marker in the output stream. The format of the marker is determined by str, which must contain three occurrences of the character % (or equivalently ?). The first occurrence is replaced with the line number, the second with the file name, and the third with 1, 2 or blank. When this option is specified in default, cpp or Prolog mode, GPP does its best to ensure that line numbers are the same in the output as in the input by inserting blank lines in the place of definitions or comments.

    • infile
      Specify an input file from which GPP reads its input. If no input file is specified, input is read from standard input.

    SYNTAX SPECIFICATION

    The syntax of a macro call is as follows: it must start with a sequence of characters matching the macro start sequence as specified in the current mode, followed immediately by the name of the macro, which must be a valid identifier—i.e., a sequence of letters, digits, or underscores ("_"). The macro name must be followed by a short macro end sequence if the macro has no arguments, or by a sequence of arguments initiated by an argument start sequence. The various arguments are then separated by an argument separator, and the macro ends with a long macro end sequence.

    In all cases, the parameters of the current context—i.e., the arguments passed to the body being evaluated—can be referred to by using an argument reference sequence followed by a digit between 1 and 9. Alternatively, macro parameters may be named (see below). Furthermore, to avoid interference between the GPP syntax and the contents of the input file, a quote character is provided. The quote character can be used to prevent the interpretation of a macro call, comment, or string as anything but plain text. The quote character "protects" the following character, and always gets removed during evaluation. Two consecutive quote characters evaluate as a single quote character.

    Finally, to facilitate proper argument delimitation, certain characters can be "stacked" when they occur in a macro argument, so that the argument separator or macro end sequence are not parsed if the argument body is not balanced. This allows nesting macro calls without using quotes. If an improperly balanced argument is needed, quote characters should be added in front of some stacked characters to make it balanced.

    The macro construction sequences described above can be different for meta-macros and for user macros: this is the case in cpp mode, for example. Note that, since meta-macros can only have up to two arguments, the delimitation rules for the second argument are somewhat sloppier, and unquoted argument separator sequences are allowed in the second argument of a meta-macro.

    Unless one of the standard operating modes is selected, the above syntax sequences can be specified either on the command-line, using the -M and -U options respectively for meta-macros and user macros, or inside an input file via the #mode meta and #mode user meta-macro calls. In both cases the mode description consists of nine parameters for user macro specifications, namely the macro start sequence, the short macro end sequence, the argument start sequence, the argument separator, the long macro end sequence, the string listing characters to stack, the string listing characters to unstack, the argument reference sequence, and finally the quote character. As explained below, these sequences should be supplied using the syntax of C strings; they must start with a non-alphanumeric character, and in the first five strings special matching sequences can be used (see below). If the argument corresponding to the quote character is the empty string, that argument's functionality is disabled. For meta-macro specifications there are only seven parameters, as the argument reference sequence and quote character are shared with the user macro syntax.

    The structure of a comment/string is as follows: it must start with a sequence of characters matching the given comment/string start sequence, and always ends at the first occurrence of the comment/string end sequence, unless it is preceded by an odd number of occurrences of the string-quote character (if such a character has been specified). In certain cases comment/strings can be specified to enable macro evaluation inside the comment/string; in that case, if a quote character has been defined for macros it can be used as well to prevent the comment/string from ending, with the difference that the macro quote character is always removed from output whereas the string-quote character is always output. Also note that under certain circumstances a comment/string specification can be disabled, in which case the comment/string start sequence is simply ignored. Finally, it is possible to specify a string warning character whose presence inside a comment/string will cause GPP to output a warning (this is useful to locate unterminated strings in cpp mode). Note that input files are not allowed to contain unterminated comments/strings.

    A comment/string specification can be declared from within the input file using the #mode comment meta-macro call (or equivalently #mode string), in which case the number of C strings to be given as arguments to describe the comment/string can be anywhere between two and four: the first two arguments (mandatory) are the start sequence and the end sequence, and can make use of the special matching sequences (see below). They may not start with alphanumeric characters. The first character of the third argument, if there is one, is used as the string-quote character (use an empty string to disable the functionality), and the first character of the fourth argument, if there is one, is used as the string-warning character. A specification may also be given from the command-line, in which case there must be two arguments if using the +c option and three if using the +s option.

    The behavior of a comment/string is specified by a three-character modifier string, which may be passed as an optional argument either to the +c/+s command-line options or to the #mode comment/#mode string meta-macros. If no modifier string is specified, the default value is "ccc" for comments and "sss" for strings. The first character corresponds to the behavior inside meta-macro calls (including user-macro definitions since these come inside a #define meta-macro call), the second character corresponds to the behavior inside user-macro parameters, and the third character corresponds to the behavior outside of any macro call. Each of these characters can take the following values:

    • i: disable the comment/string specification.

    • c: comment (neither evaluated nor output).

    • s: string (the string and its delimiter sequences are output as-is).

    • q: quoted string (the string is output as-is, without the delimiter sequences).

    • C: evaluated comment (macros are evaluated, but output is discarded).

    • S: evaluated string (macros are evaluated, delimiters are output).

    • Q: evaluated quoted string (macros are evaluated, delimiters are not output).

    Important note: any occurrence of a comment/string start sequence inside another comment/string is always ignored, even if macro evaluation is enabled. In other words, comments/strings cannot be nested. In particular, the `Q' modifier can be a convenient way of defining a syntax for temporarily disabling all comment and string specifications.

    Syntax specification strings should always be provided as C strings, whether they are given as arguments to a #mode meta-macro call or on the command-line of a Unix shell. If command-line arguments are given via another method than a standard Unix shell, then the shell behavior must be emulated—i.e., the surrounding "" quotes should be removed, all occurrences of `\\' should be replaced by a single backslash, and similarly `\"' should be replaced by `"'. Sequences like `\n' are recognized by GPP and should be left as is.

    Special sequences matching certain subsets of the character set can be used. They are of the form `\x', where x is one of:

    • b: matches any sequence of one or more spaces or tab characters (`\b' is identical to ` ').

    • w: matches any sequence of zero or more spaces or tab characters.

    • B: matches any sequence of one or more spaces, tabs or newline characters.

    • W: matches any sequence of zero or more spaces, tabs or newline characters.

    • a: an alphabetic character (`a' to `z' and `A' to `Z').

    • A: an alphabetic character, or a space, tab or newline.

    • #: a digit (`0' to `9').

    • i: an identifier character. The set of matched characters is customizable using the #mode charset id command. The default setting matches alphanumeric characters and underscores (`a' to `z', `A' to `Z', `0' to `9' and `_').

    • t: a tab character.

    • n: a newline character.

    • o: an operator character. The set of matched characters is customizable using the #mode charset op command. The default setting matches all characters in "+-*/\^<>=`~:.?@#&!%|", except in Prolog mode where `!', `%' and `|' are not matched.

    • O: an operator character or a parenthesis character. The set of additional matched characters in comparison with `\o' is customizable using the #mode charset par command. The default setting is to have the characters in "()[]{}" as parentheses.

    Moreover, all of these matching subsets except `\w' and `\W' can be negated by inserting a `!'—i.e., by writing `\!x' instead of `\x'.

    Note an important distinctive feature of start sequences: when the first character of a macro or comment/string start sequence is ' ' or one of the above special sequences, it is not taken to be part of the sequence itself but is used instead as a context check: for example a start sequence beginning with '\n' matches only at the beginning of a line, but the matching newline character is not taken to be part of the sequence. Similarly a start sequence beginning with ' ' matches only if some whitespace is present, but the matching whitespace is not considered to be part of the start sequence and is therefore sent to output. If a context check is performed at the very beginning of a file (or more generally of any body to be evaluated), the result is the same as matching with a newline character (this makes it possible for a cpp-mode file to start with a meta-macro call).

    Two special syntax rules were added in version 2.1. First, argument references (#n) are no longer evaluated when they are outside of macro calls and definitions. However, they are no longer allowed to appear (unless protected by quote characters) inside a call to a defined user macro; the current behavior (backwards compatible) is to remove them silently from the input if that happens.

    Second, if the end sequence (either for macros or comments) consists of a single newline character, and if delimitation rules lead to evaluation in a context where the final newline character is absent, GPP silently ignores the missing newline instead of producing an error. The main consequence is that meta-macro calls can now be nested in a simple way in standard, cpp and Prolog modes.

    EVALUATION RULES

    Input is read sequentially and interpreted according to the rules of the current mode. All input text is first matched against the specified comment/string start sequences of the current mode (except those which are disabled by the 'i' modifier), unless the body being evaluated is the contents of a comment/string whose modifier enables macro evaluation. The most recently defined comment/string specifications are checked for first. Important note: comments may not appear between the name of a macro and its arguments (doing so results in undefined behavior).

    Anything that is not a comment/string is then matched against a possible meta-macro call, and if that fails too, against a possible user-macro call. All remaining text undergoes substitution of argument reference sequences by the relevant argument text (empty unless the body being evaluated is the definition of a user macro) and removal of the quote character if there is one.

    Note that meta-macro arguments are passed to the meta-macro prior to any evaluation (although the meta-macro may choose to evaluate them, see meta-macro descriptions below). In the case of the #mode meta-macro, GPP temporarily adds a comment/string specification to enable recognition of C strings ("…") and prevent any evaluation inside them, so no interference of the characters being put in the C string arguments to #mode with the current syntax is to be feared.

    On the other hand, the arguments to a user macro are systematically evaluated, and then passed as context parameters to the macro definition body, which gets evaluated with that environment. The only exception is when the macro definition is empty, in which case its arguments are not evaluated. Note that GPP temporarily switches back to the mode in which the macro was defined in order to evaluate it, so it is perfectly safe to change the operating mode between the time a macro is defined and the time when it is called. Conversely, if a user macro wishes to work with the current mode instead of the one that was used to define it it needs to start with a #mode restore call and end with a #mode save call.

    A user macro may be defined with named arguments (see #define description below). In that case, when the macro definition is being evaluated, each named parameter causes a temporary virtual user-macro definition to be created; such a macro may be called only without arguments and simply returns the text of the corresponding argument.

    Note that, since macros are evaluated when they are called rather than when they are defined, any attempt to call a recursive macro causes undefined behavior except in the very specific case when the macro uses #undef to erase itself after finitely many loop iterations.

    Finally, a special case occurs when a user macro whose definition does not involve any arguments (neither named arguments nor the argument reference sequence) is called in a mode where the short user-macro end sequence is empty (e.g., cpp or TeX mode). In that case it is assumed to be an alias macro: its arguments are first evaluated in the current mode as usual, but instead of being passed to the macro definition as parameters (which would cause them to be discarded) they are actually appended to the macro definition, using the syntax rules of the mode in which the macro was defined, and the resulting text is evaluated again. It is therefore important to note that, in the case of a macro alias, the arguments actually get evaluated twice in two potentially different modes.

    META-MACROS

    These macros are always predefined. Their actual calling sequence depends on the current mode; here we use cpp-like notation.

    • #define x y
      This defines the user macro x as y. y can be any valid GPP input, and may for example refer to other macros. x must be an identifier (i.e., a sequence of alphanumeric characters and '_'), unless named arguments are specified. If x is already defined, the previous definition is overwritten. If no second argument is given, x will be defined as a macro that outputs nothing. Neither x nor y are evaluated; the macro definition is only evaluated when it is called, not when it is declared.

      It is also possible to name the arguments in a macro definition: in that case, the argument x should be a user-macro call whose arguments are all identifiers. These identifiers become available as user-macros inside the macro definition; these virtual macros must be called without arguments, and evaluate to the corresponding macro parameter.

    • #defeval x y
      This acts in a similar way to #define, but the second argument y is evaluated immediately. Since user macro definitions are also evaluated each time they are called, this means that the macro y will undergo two successive evaluations. The usefulness of #defeval is considerable as it is the only way to evaluate something more than once, which may be needed to force evaluation of the arguments of a meta-macro that normally doesn't perform any evaluation. However since all argument references evaluated at define-time are understood as the arguments of the body in which the macro is being defined and not as the arguments of the macro itself, usually one has to use the quote character to prevent immediate evaluation of argument references.

    • #undef x
      This removes any existing definition of the user macro x.

    • #ifdef x
      This begins a conditional block. Everything that follows is evaluated only if the identifier x is defined, and until either a #else or a #endif statement is reached. Note, however, that the commented text is still scanned thoroughly, so its syntax must be valid. It is in particular legal to have the #else or #endif statement ending the conditional block appear only as the result of a user-macro expansion and not explicitly in the input.

    • #ifndef x
      This begins a conditional block. Everything that follows is evaluated only if the identifier x is not defined.

    • #ifeq x y
      This begins a conditional block. Everything that follows is evaluated only if the results of the evaluations of x and y are identical as character strings. Any leading or trailing whitespace is ignored for the comparison. Note that in cpp-mode any unquoted whitespace character is understood as the end of the first argument, so it is necessary to be careful.

    • #ifneq x y
      This begins a conditional block. Everything that follows is evaluated only if the results of the evaluations of x and y are not identical (even up to leading or trailing whitespace).

    • #else
      This toggles the logical value of the current conditional block. What follows is evaluated if and only if the preceding input was commented out.

    • #endif
      This ends a conditional block started by a #if… meta-macro.

    • #include file
      This causes GPP to open the specified file and evaluate its contents, inserting the resulting text in the current output. All defined user macros are still available in the included file, and reciprocally all macros defined in the included file will be available in everything that follows. The include file is looked for first in the current directory, and then, if not found, in one of the directories specified by the -I command-line option (or /usr/include if no directory was specified). Note that, for compatibility reasons, it is possible to put the file name between "" or <>.

      The order in which the various directories are searched for include files is affected by the -nostdinc, -nocurinc and -curdirinclast command-line options.

      Upon including a file, GPP immediately saves a copy of the current operating mode onto the mode stack, and restores the operating mode at the end of the included file. The included file may override this behavior by starting with a #mode restore call and ending with a #mode push call. Additionally, when the -m command line option is specified, GPP will automatically switch to the cpp compatibility mode upon including a file whose name ends with either '.c' or '.h'.

    • #exec command
      This causes GPP to execute the specified command line and include its standard output in the current output. Note that, for security reasons, this meta-macro is disabled unless the -x command line flag was specified. If use of #exec is not allowed, a warning message is printed and the output is left blank. Note that the specified command line is evaluated before being executed, thus allowing the use of macros in the command-line. However, the output of the command is included verbatim and not evaluated. If you need the output to be evaluated, you must use #defeval (see above) to cause a double evaluation.

    • #eval expr
      The #eval meta-macro attempts to evaluate expr first by expanding macros (normal GPP evaluation) and then by performing arithmetic evaluation and/or wildcard matching. The syntax and operator precedence for arithmetic expressions are the same as in C; the only missing operators are <<, >>, ?:, and the assignment operators.

      POSIX-style wildcard matching ('globbing') is available only on POSIX implementations and can be invoked with the =~ operator. In brief, a '?' matches any single character, a '*' matches any string (including the empty string), and '[…]' matches any one of the characters enclosed in brackets. A '[…]' class is complemented when the first character in the brackets is '!'. The characters in a '[…]' class can also be specified as a range using the '-' character—e.g., '[F-N]' is equivalent to '[FGHIJKLMN]'.

      If unable to assign a numerical value to the result, the returned text is simply the result of macro expansion without any arithmetic evaluation. The only exceptions to this rule are the comparison operators ==, !=, <, >, <=, and >= which, if one of the sides does not evaluate to a number, perform string comparison instead (ignoring trailing and leading spaces). Additionally, the length(…) arithmetic operator returns the length in characters of its evaluated argument.

      Inside arithmetic expressions, the defined(…) special user macro is also available: it takes only one argument, which is not evaluated, and returns 1 if it is the name of a user macro and 0 otherwise.

    • #if expr
      This meta-macro invokes the arithmetic/globbing evaluator in the same manner as #eval and compares the result of evaluation with the string "0" in order to begin a conditional block. In particular note that the logical value of expr is always true when it cannot be evaluated to a number.

    • #elif expr
      This meta-macro can be used to avoid nested #if conditions. #if … #elif … #endif is equivalent to #if … #else #if … #endif #endif.

    • #mode keyword …
      This meta-macro controls GPP's operating mode. See below for a list of #mode commands.

    • #line
      This meta-macro evaluates to the line number of the current input file.

    • #file
      This meta-macro evaluates to the filename of the current input file as it appears on the command line or in the argument to #include. If GPP is reading its input from stdin, then #file evaluates to `stdin'.

    • #date fmt
      This meta-macro evaluates to the current date and time as formatted by the specified format string fmt. See the section DATE AND TIME CONVERSION SPECIFIERS below.

    • #error msg
      This meta-macro causes an error message with the current filename and line number, and with the text msg, to be printed to the standard error device. Subsequent processing is then aborted.

    • #warning msg
      This meta-macro causes a warning message with the current filename and line number, and with the text msg, to be printed to the standard error device. Subsequent processing is then resumed.

    The key to GPP's flexibility is the #mode meta-macro. Its first argument is always one of a list of available keywords (see below); its second argument is always a sequence of words separated by whitespace. Apart from possibly the first of them, each of these words is always a delimiter or syntax specifier, and should be provided as a C string delimited by double quotes (" "). The various special matching sequences listed in the section on syntax specification are available. Any #mode command is parsed in a mode where "…" is understood to be a C-style string, so it is safe to put any character inside these strings. Also note that the first argument of #mode (the keyword) is never evaluated, while the second argument is evaluated (except of course for the contents of C strings), so that the syntax specification may be obtained as the result of a macro evaluation.

    The available #mode commands are:

    • #mode save / #mode push
      Push the current mode specification onto the mode stack.

    • #mode restore / #mode pop
      Pop mode specification from the mode stack.

    • #mode standard name
      Select one of the standard modes. The only argument must be one of: default (default mode); cpp, C (cpp mode); tex, TeX (tex mode); html, HTML (html mode); xhtml, XHTML (xhtml mode); prolog, Prolog (prolog mode). The mode name must be given directly, not as a C string.

    • #mode user "s1" … "s9"
      Specify user macro syntax. The 9 arguments, all of them C strings, are the mode specification for user macros (see the -U command-line option and the section on syntax specification). The meta-macro specification is not affected.

    • #mode meta {user | "s1" … "s7"}
      Specify meta-macro syntax. Either the only argument is user (not as a string), and the user-macro mode specifications are copied into the meta-macro mode specifications, or there must be seven string arguments, whose significance is the same as for the -M command-line option (see section on syntax specification).

    • #mode quote ["c"]
      With no argument or "" as argument, removes the quote character specification and disables the quoting functionality. With one string argument, the first character of the string is taken to be the new quote character. The quote character can be neither alphanumeric nor '_', nor can it be one of the special matching sequences.

    • #mode comment [xxx] "start" "end" ["c" ["c"]]
      Add a comment specification. Optionally a first argument consisting of three characters not enclosed in " " can be used to specify a comment/string modifier (see the section on syntax specification). The default modifier is ccc. The first two string arguments are used as comment start and end sequences respectively. The third string argument is optional and can be used to specify a string-quote character. (If it is "", the functionality is disabled.) The fourth string argument is optional and can be used to specify a string delimitation warning character. (If it is "", the functionality is disabled.)

    • #mode string [xxx] "start" "end" ["c" ["c"]]
      Add a string specification. Identical to #mode comment except that the default modifier is sss.

    • #mode nocomment / #mode nostring ["start"]
      With no argument, remove all comment/string specifications. With one string argument, delete the comment/string specification whose start sequence is the argument.

    • #mode preservelf { on | off | 1 | 0 }
      Equivalent to the -n command-line switch. If the argument is on or 1, any newline or whitespace character terminating a macro call or a comment/string is left in the input stream for further processing. If the argument is off or 0 this feature is disabled.

    • #mode charset { id | op | par } "string"
      Specify the character sets to be used for matching the \o, \O and \i special sequences. The first argument must be one of id (the set matched by \i), op (the set matched by \o) or par (the set matched by \O in addition to the one matched by \o). "string" is a C string which lists all characters to put in the set. It may contain only the special matching sequences \a, \A, \b, \B, and \# (the other sequences and the negated sequences are not allowed). When a '-' is found inbetween two non-special characters this adds all characters inbetween (e.g. "A-Z" corresponds to all uppercase characters). To have '-' in the matched set, either put it in first or last position or place it next to a \x sequence.

    DATE AND TIME CONVERSION SPECIFIERS

    Ordinary characters placed in the format string are copied to without conversion. Conversion specifiers are introduced by a `%' character, and are replaced as follows:

    • %a
      The abbreviated weekday name according to the current locale.

    • %A
      The full weekday name according to the current locale.

    • %b
      The abbreviated month name according to the current locale.

    • %B
      The full month name according to the current locale.

    • %c
      The preferred date and time representation for the current locale.

    • %d
      The day of the month as a decimal number (range 01 to 31).

    • %F
      Equivalent to %Y-%m-%d (the ISO 8601 date format).

    • %H
      The hour as a decimal number using a 24-hour clock (range 00 to 23).

    • %I
      The hour as a decimal number using a 12-hour clock (range 01 to 12).

    • %j
      The day of the year as a decimal number (range 001 to 366).

    • %m
      The month as a decimal number (range 01 to 12).

    • %M
      The minute as a decimal number (range 00 to 59).

    • %p
      Either `AM' or `PM' according to the given time value, or the corresponding strings for the current locale. Noon is treated as `pm' and midnight as `am'.

    • %R
      The time in 24-hour notation (%H:%M).

    • %S
      The second as a decimal number (range 00 to 61).

    • %U
      The week number of the current year as a decimal number, range 00 to 53, starting with the first Sunday as the first day of week 01.

    • %w
      The day of the week as a decimal, range 0 to 6, Sunday being 0.

    • %W
      The week number of the current year as a decimal number, range 00 to 53, starting with the first Monday as the first day of week 01.

    • %x
      The preferred date representation for the current locale without the time.

    • %X
      The preferred time representation for the current locale without the date.

    • %y
      The year as a decimal number without a century (range 00 to 99).

    • %Y
      The year as a decimal number including the century.

    • %Z
      The time zone or name or abbreviation.

    • %%
      A literal `%' character.

    Depending on the C compiler and library used to compile GPP, there may be more conversion specifiers available. Consult your compiler's documentation for the strftime() function. Note, however, that any conversion specifiers not listed above may not be portable across installations of GPP.

    EXAMPLES

    Here is a basic self-explanatory example in standard or cpp mode: 
      #define FOO This is
  #define BAR a message.
  #define concat #1 #2
  concat(FOO,BAR)
  #ifeq (concat(foo,bar)) (foo bar)
  This is output.
  #else
  This is not output.
  #endif
    Using argument naming, the concat macro could alternatively be defined as 
      #define concat(x,y) x y
    In TeX mode and using argument naming, the same example becomes: 
      \define{FOO}{This is}
  \define{BAR}{a message.}
  \define{\concat{x}{y}}{\x \y}
  \concat{\FOO}{\BAR}
  \ifeq{\concat{foo}{bar}}{foo bar}
  This is output.
  \else
  This is not output.
  \endif
    In HTML mode and without argument naming, one gets similarly: 
      <#define FOO|This is>
  <#define BAR|a message.>
  <#define concat|#1 #2>
  <#concat <#FOO>|<#BAR>>
  <#ifeq <#concat foo|bar>|foo bar>
  This is output.
  <#else>
  This is not output.
  <#endif>
    The following example (in standard mode) illustrates the use of the quote character: 
      #define FOO This is \
     a multiline definition.
  #define BLAH(x) My argument is x
  BLAH(urf)
  \BLAH(urf)
    Note that the multiline definition is also valid in cpp and Prolog modes despite the absence of quote character, because '\' followed by a newline is then interpreted as a comment and discarded.

    In cpp mode, C strings and comments are understood as such, as illustrated by the following example: 

      #define BLAH foo
  BLAH "BLAH" /* BLAH */
  'It\'s a /*string*/ !'
    The main difference between Prolog mode and cpp mode is the handling of strings and comments: in Prolog, a '…' string may not begin immediately after a digit, and a /*…*/ comment may not begin immediately after an operator character. Furthermore, comments are not removed from the output unless they occur in a #command.

    The differences between cpp mode and default mode are deeper: in default mode #commands may start anywhere, while in cpp mode they must be at the beginning of a line; the default mode has no knowledge of comments and strings, but has a quote character ('\'), while cpp mode has extensive comment/string specifications but no quote character. Moreover, the arguments to meta-macros need to be correctly parenthesized in default mode, while no such checking is performed in cpp mode.

    This makes it easier to nest meta-macro calls in default mode than in cpp mode. For example, consider the following HTML mode input, which tests for the availability of the #exec command: 

      <#ifeq <#exec echo blah>|blah
  > #exec allowed <#else> #exec not allowed <#endif>
    There is no cpp mode equivalent, while in default mode it can be easily translated as 
      #ifeq (#exec echo blah
  ) (blah
  )
  \#exec allowed
  #else
  \#exec not allowed
  #endif
    In order to nest meta-macro calls in cpp mode it is necessary to modify the mode description, either by changing the meta-macro call syntax, or more elegantly by defining a silent string and using the fact that the context at the beginning of an evaluated string is a newline character: 
      #mode string QQQ "$" "$"
  #ifeq $#exec echo blah
  $ $blah
  $
  \#exec allowed
  #else
  \#exec not allowed
  #endif
    Note, however, that comments/strings cannot be nested ("…" inside $…$ would go undetected), so one needs to be careful about what to include inside such a silent evaluated string. In this example, the loose meta-macro nesting introduced in version 2.1 makes it possible to use the following simpler version: 
      #ifeq blah #exec echo -n blah
  \#exec allowed
  #else
  \#exec not allowed
  #endif
    Remember that macros without arguments are actually understood to be aliases when they are called with arguments, as illustrated by the following example (default or cpp mode): 
      #define DUP(x) x x
  #define FOO and I said: DUP
  FOO(blah)
    The usefulness of the #defeval meta-macro is shown by the following example in HTML mode: 
      <#define APPLY|<#defeval TEMP|<\##1 \#1>><#TEMP #2>>
  <#define <#foo x>|<#x> and <#x>>
  <#APPLY foo|BLAH>
    The reason why #defeval is needed is that, since everything is evaluated in a single pass, the input that will result in the desired macro call needs to be generated by a first evaluation of the arguments passed to APPLY before being evaluated a second time.

    To translate this example in default mode, one needs to resort to parenthesizing in order to nest the #defeval call inside the definition of APPLY, but need to do so without outputting the parentheses. The easiest solution is 

      #define BALANCE(x) x
  #define APPLY(f,v) BALANCE(#defeval TEMP f
  TEMP(v))
  #define foo(x) x and x
  APPLY(\foo,BLAH)
    As explained above the simplest version in cpp mode relies on defining a silent evaluated string to play the role of the BALANCE macro.

    The following example (default or cpp mode) demonstrates arithmetic evaluation: 

      #define x 4
  The answer is:
  #eval x*x + 2*(16-x) + 1998%x

  #if defined(x)&&!(3*x+5>17)
  This should be output.
  #endif
    To finish, here are some examples involving mode switching. The following example is self-explanatory (starting in default mode): 
      #mode push
  #define f(x) x x
  #mode standard tex
  \f{blah}
  \mode{string}{"$" "$"}
  \mode{comment}{"/*" "*/"}
  $\f{urf}$ /* blah */
  \define{FOO}{bar/* and some more */}
  \mode{pop}
  f($FOO$)
    A good example where a user-defined mode becomes useful is the GPP source of this document (available with GPP's source code distribution).

    Another interesting application is selectively forcing evaluation of macros in C strings when in cpp mode. For example, consider the following input: 

      #define blah(x) "and he said: x"
  blah(foo)
    Obviously one would want the parameter x to be expanded inside the string. There are several ways around this problem: 
      #mode push
  #mode nostring "\""
  #define blah(x) "and he said: x"
  #mode pop

  #mode quote "`"
  #define blah(x) `"and he said: x`"

  #mode string QQQ "$$" "$$"
  #define blah(x) $$"and he said: x"$$
    The first method is very natural, but has the inconvenience of being lengthy and neutralizing string semantics, so that having an unevaluated instance of 'x' in the string, or an occurrence of '/*', would be impossible without resorting to further contortions.

    The second method is slightly more efficient because the local presence of a quote character makes it easier to control what is evaluated and what isn't, but has the drawback that it is sometimes impossible to find a reasonable quote character without having to either significantly alter the source file or enclose it inside a #mode push/pop construct. For example, any occurrence of '/*' in the string would have to be quoted.

    The last method demonstrates the efficiency of evaluated strings in the context of selective evaluation: since comments/strings cannot be nested, any occurrence of '"' or '/*' inside the '$$' gets output as plain text, as expected inside a string, and only macro evaluation is enabled. Also note that there is much more freedom in the choice of a string delimiter than in the choice of a quote character.

    Starting with version 2.1, meta-macro calls can be nested more efficiently in default, cpp and Prolog modes. This makes it easy to make a user version of a meta-macro, or to increment a counter: 

      #define myeval #eval #1

  #define x 1
  #defeval x #eval x+1

    ADVANCED EXAMPLES

    Here are some examples of advanced constructions using GPP. They tend to be pretty awkward and should be considered as evidence of GPP's limitations.

    The first example is a recursive macro. The main problem is that (since GPP evaluates everything) a recursive macro must be very careful about the way in which recursion is terminated in order to avoid undefined behavior (most of the time GPP will simply crash). In particular, relying on a #if/#else/#endif construct to end recursion is not possible and results in an infinite loop, because GPP scans user macro calls even in the unevaluated branch of the conditional block. A safe way to proceed is for example as follows (we give the example in TeX mode): 

      \define{countdown}{
    \if{#1}
    #1...
    \define{loop}{\countdown}
    \else
    Done.
    \define{loop}{}
    \endif
    \loop{\eval{#1-1}}
  }
  \countdown{10}

    Another example, in cpp mode: 

      #mode string QQQ "$" "$"
  #define triangle(x,y) y \
   $#if length(y)<x$ $#define iter triangle$ $#else$ \
   $#define iter$ $#endif
  $ iter(x,*y)
  triangle(20)

    The following is an (unfortunately very weak) attempt at implementing functional abstraction in GPP (in standard mode). Understanding this example and why it can't be made much simpler is an exercise left to the curious reader. 

      #mode string "`" "`" "\\"
  #define ASIS(x) x
  #define SILENT(x) ASIS()
  #define EVAL(x,f,v) SILENT(
    #mode string QQQ "`" "`" "\\"
    #defeval TEMP0 x
    #defeval TEMP1 (
      \#define \TEMP2(TEMP0) f
    )
    TEMP1
    )TEMP2(v)
  #define LAMBDA(x,f,v) SILENT(
    #ifneq (v) ()
    #define TEMP3(a,b,c) EVAL(a,b,c)
    #else
    #define TEMP3(a,b,c) \LAMBDA(a,b)
    #endif
    )TEMP3(x,f,v)
  #define EVALAMBDA(x,y) SILENT(
    #defeval TEMP4 x
    #defeval TEMP5 y
    ) 
  #define APPLY(f,v) SILENT(
    #defeval TEMP6 ASIS(\EVA)f
    TEMP6
    )EVAL(TEMP4,TEMP5,v)
    This yields the following results: 
      LAMBDA(z,z+z)
    => LAMBDA(z,z+z)

  LAMBDA(z,z+z,2)
    => 2+2

  #define f LAMBDA(y,y*y)
  f
    => LAMBDA(y,y*y)

  APPLY(f,blah)
    => blah*blah

  APPLY(LAMBDA(t,t t),(t t))
    => (t t) (t t)

  LAMBDA(x,APPLY(f,(x+x)),urf)
    => (urf+urf)*(urf+urf)

  APPLY(APPLY(LAMBDA(x,LAMBDA(y,x*y)),foo),bar)
    => foo*bar

  #define test LAMBDA(y,`#ifeq y urf
  y is urf#else
  y is not urf#endif
  `)
  APPLY(test,urf)
    => urf is urf

  APPLY(test,foo)
    => foo is not urf

    AUTHOR

    GPP was written by Denis Auroux <auroux@math.mit.edu>. Since version 2.12 it has been maintained by Tristan Miller <psychonaut@nothingisreal.com>.

    COPYRIGHT

    Copyright © 1996–2001 Denis Auroux.
    Copyright © 2003, 2004 Tristan Miller.

    Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and this permission notice are preserved, thus giving the recipient permission to redistribute in turn.

    Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last changed them. gpp-2.24/src/0000777000076400001440000000000010123366424006564 5gpp-2.24/src/gpp.c0000644000076400001440000023714510123364704007445 /* File: gpp.c -- generic preprocessor ** Author: Denis Auroux, Tristan Miller ** Contact: psychonaut@nothingisreal.com ** ** Copyright (C) 1996, 1999, 2001 Denis Auroux ** Copyright (C) 2003, 2004 Tristan Miller ** ** GPP is free software; you can redistribute it and/or modify it under the ** terms of the GNU Lesser General Public License as published by the Free ** Software Foundation; either version 2.1 of the License, or (at your option) ** any later version. ** ** GPP is distributed in the hope that it will be useful, but WITHOUT ANY ** WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS ** FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for ** more details. ** ** You should have received a copy of the GNU Lesser General Public License ** along with this software; if not, write to the Free Software Foundation, ** Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ** ** $Id: gpp.c,v 1.10 2004/09/19 20:19:16 psy Exp $ ** */ /* To compile under MS VC++, one must define WIN_NT */ #if HAVE_CONFIG_H # include #endif #ifdef WIN_NT /* WIN NT settings */ #define popen _popen #define pclose _pclose #define my_strdup _strdup #define my_strcasecmp _stricmp #define SLASH '\\' #define DEFAULT_CRLF 1 #else /* UNIX settings */ #define SLASH '/' #define DEFAULT_CRLF 0 #endif #include #include #include #include #if HAVE_FNMATCH_H # include #endif #include #define STACKDEPTH 50 #define MAXARGS 100 #define MAXINCL 10 /* max # of include dirs */ #define MAX_GPP_NUM_SIZE 15 #define MAX_GPP_DATE_SIZE 1024 typedef struct MODE { char *mStart; /* before macro name */ char *mEnd; /* end macro without arg */ char *mArgS; /* start 1st argument */ char *mArgSep; /* separate arguments */ char *mArgE; /* end last argument */ char *mArgRef; /* how to refer to arguments in a def */ char quotechar; /* quote next char */ char *stackchar; /* characters to stack */ char *unstackchar ; /* characters to unstack */ } MODE; /* translation for delimiters : \001 = \b = ' ' = one or more spaces \201 = \!b = non-space \002 = \w = zero or more spaces \003 = \B = one or more spaces or \n \203 = \!B = non-space nor \n \004 = \W = zero or more spaces or \n \005 = \a = alphabetic (a-z, A-Z) \205 = \!a = non-alphabetic \006 = \A = alphabetic or space/\n \206 = \!A \007 = \# = numeric (0-9) \207 = \!# \010 = \i = identifier (a-zA-Z0-9_) \210 = \!i \011 = \t, \012 = \n \211 = \!t, \212 = \!n \013 = \o = operator (+-*\/^<>=`~:.?@#&!%|) \213 = \!o \014 = \O = operator or ()[]{} \214 = \!O */ /* st end args sep arge ref quot stk unstk*/ struct MODE CUser = {"", "", "(", ",", ")", "#", '\\', "(", ")" }; struct MODE CMeta = {"#", "\n", "\001","\001","\n","#", '\\', "(", ")" }; struct MODE KUser = {"", "", "(", ",", ")", "#", 0, "(", ")" }; struct MODE KMeta = {"\n#\002","\n", "\001","\001","\n","#", 0, "", "" }; struct MODE Tex = {"\\", "", "{", "}{", "}", "#", '@', "{", "}" }; struct MODE Html = {"<#", ">", "\003","|", ">", "#", '\\', "<", ">" }; struct MODE XHtml = {"<#", "/>", "\003","|", "/>","#", '\\', "<", ">" }; #define DEFAULT_OP_STRING (unsigned char *)"+-*/\\^<>=`~:.?@#&!%|" #define PROLOG_OP_STRING (unsigned char *)"+-*/\\^<>=`~:.?@#&" #define DEFAULT_OP_PLUS (unsigned char *)"()[]{}" #define DEFAULT_ID_STRING (unsigned char *)"\005\007_" /* or equiv. "A-Za-z0-9_" */ /* here we assume that longs are at least 32 bit... if not, change this ! */ #define LOG_LONG_BITS 5 #define CHARSET_SUBSET_LEN (256>>LOG_LONG_BITS) typedef unsigned long *CHARSET_SUBSET; CHARSET_SUBSET DefaultOp,DefaultExtOp,PrologOp,DefaultId; typedef struct COMMENT { char *start; /* how the comment/string starts */ char *end; /* how it ends */ char quote; /* how to prevent it from ending */ char warn; /* a character that shouldn't be in there */ int flags[3]; /* meta, user, text */ struct COMMENT *next; } COMMENT; #define OUTPUT_TEXT 0x1 /* what's inside will be output */ #define OUTPUT_DELIM 0x2 /* the delimiters will be output */ #define PARSE_MACROS 0x4 /* macros inside will be parsed */ #define FLAG_IGNORE 0x40 #define FLAG_STRING (OUTPUT_TEXT|OUTPUT_DELIM) #define FLAG_COMMENT 0 #define FLAG_META 0 #define FLAG_USER 1 #define FLAG_TEXT 2 /* Some stuff I removed because it made for some impossible situations : #define PARSE_COMMENTS 0x8 comments inside comments will not be parsed because nesting comments is too complicated (syntax conflicts, esp. to find a comment's end) -- of course, unless the comment is ignored. #define MACRO_FRIENDLY 0x20 a comment-end is to be processed even if an unfinished macro call has started inside the comment, otherwise it's too hard do decide in advance where a comment ends. In particular foo('bar((((') is valid. #define PREVENT_DELIM 0x10 all comments will prevent macro delimitation, i.e. foo('bar) is invalid. -- of course, unless the comment is ignored. Too bad, #define foo '... terminates only at following "'". Unless one adds quotechars like in #define foo \' ... ALSO NOTE : comments are not allowed before the end of the first argument to a meta-macro. E.g. this is legal : #define foo <* blah *> 3 This is not legal : #define <* blah *> foo 3 If a comment occurs here, the behavior depends on the actual meta-macro : most will yield an error and stop gpp (#define, #undef, #ifdef/ifndef, #defeval, #include, #mode) ; #exec, #if and #eval should be ok ; #ifeq will always fail while #ifneq will always succeed ; */ typedef struct SPECS { struct MODE User,Meta; struct COMMENT *comments; struct SPECS *stack_next; int preservelf; CHARSET_SUBSET op_set,ext_op_set,id_set; } SPECS; struct SPECS *S; typedef struct MACRO { char *username,*macrotext,**argnames; int macrolen,nnamedargs; struct SPECS *define_specs; int defined_in_comment; } MACRO; struct MACRO *macros; int nmacros,nalloced; char *includedir[MAXINCL]; int nincludedirs; int execallowed; int dosmode; int autoswitch; /* must be a format-like string that has % % % in it. The first % is replaced with line number, the second with "filename", and the third with 1, 2 or blank Can also use ? instead of %. */ char *include_directive_marker = NULL; short WarningLevel = 2; /* controls if standard dirs, like /usr/include, are to be searched for #include and whether the current dir is to be searched first or last. */ int NoStdInc = 0; int NoCurIncFirst = 0; int CurDirIncLast = 0; int file_and_stdout = 0; char *IncludeFile = NULL; typedef struct OUTPUTCONTEXT { char *buf; int len,bufsize; FILE *f; } OUTPUTCONTEXT; typedef struct INPUTCONTEXT { char *buf; char *malloced_buf; /* what was actually malloc-ed (buf may have shifted) */ int len,bufsize; int lineno; char *filename; FILE *in; int argc; char **argv; char **namedargs; struct OUTPUTCONTEXT *out; int eof; int in_comment; int ambience; /* FLAG_TEXT, FLAG_USER or FLAG_META */ int may_have_args; } INPUTCONTEXT; struct INPUTCONTEXT *C; int commented[STACKDEPTH],iflevel; /* commented = 0: output, 1: not output, 2: not output because we're in a #elif and we've already gone through the right case (so #else/#elif can't toggle back to output) */ void ProcessContext(void); /* the main loop */ int findIdent(const char *b,int l); void delete_macro(int i); /* various recent additions */ void usage(void); void display_version(void); void bug(const char *s); void warning(const char *s); static void getDirname(const char *fname, char *dirname); static FILE *openInCurrentDir(const char *incfile); char *ArithmEval(int pos1,int pos2); void replace_definition_with_blank_lines(const char *start, const char *end, int skip); void replace_directive_with_blank_line(FILE *file); void write_include_marker(FILE *f, int lineno, char *filename, const char *marker); void construct_include_directive_marker(char **include_directive_marker, const char *includemarker_input); void escape_backslashes(const char *instr, char **outstr); static void DoInclude(char *file_name); /* ** strdup() and my_strcasecmp() are not ANSI C, so here we define our own ** versions in case the compiler does not support them */ #if ! HAVE_STRDUP inline char *my_strdup(const char *s); inline char *my_strdup(const char *s) { size_t len=strlen(s) + 1; char *newstr=malloc(len); return newstr ? (char *)memcpy(newstr, s, len) : NULL; } #else # undef my_strdup # define my_strdup strdup #endif #if ! HAVE_STRCASECMP int my_strcasecmp(const char *s, const char *s2) { do { char c1=tolower(*s); char c2=tolower(*s2); if (c1>c2) return 1; if (c1filename,C->lineno,s); exit(EXIT_FAILURE); } void warning(const char *s) { fprintf(stderr,"%s:%d: warning: %s\n",C->filename,C->lineno,s); } struct SPECS *CloneSpecs(const struct SPECS *Q) { struct SPECS *P; struct COMMENT *x,*y; P=malloc(sizeof *P); if (P==NULL) bug("Out of memory."); memcpy(P,Q,sizeof(struct SPECS)); P->stack_next=NULL; if (Q->comments!=NULL) P->comments=malloc(sizeof *(P->comments)); for (x=Q->comments,y=P->comments;x!=NULL;x=x->next,y=y->next) { memcpy(y,x,sizeof(struct COMMENT)); y->start=my_strdup(x->start); y->end=my_strdup(x->end); if (x->next!=NULL) y->next=malloc(sizeof *(y->next)); } return P; } void FreeComments(struct SPECS *Q) { struct COMMENT *p; while (Q && Q->comments!=NULL) { p=Q->comments; Q->comments=p->next; free(p->start); free(p->end); free(p); } } void PushSpecs(const struct SPECS *X) { struct SPECS *P; P=CloneSpecs(X); P->stack_next=S; S=P; } void PopSpecs(void) { struct SPECS *P; P=S; S=P->stack_next; FreeComments(P); free(P); if (S==NULL) bug("#mode restore without #mode save"); } void display_version(void) { fprintf(stderr, PACKAGE_STRING "\n"); fprintf(stderr,"Copyright (C) 1996-2001 Denis Auroux\n"); fprintf(stderr,"Copyright (C) 2003, 2004 Tristan Miller\n"); fprintf(stderr, "This is free software; see the source for copying conditions. There is NO\n" "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" ); } void usage(void) { fprintf(stderr,"Usage : gpp [-{o|O} outfile] [-I/include/path] [-Dname=val ...] [-z] [-x] [-m]\n"); fprintf(stderr," [-n] [-C | -T | -H | -X | -P | -U ... [-M ...]] [+c str1 str2]\n"); fprintf(stderr," [+s str1 str2 c] [long options] [infile]\n\n"); fprintf(stderr," default: #define x y macro(arg,...)\n"); fprintf(stderr," -C : maximum cpp compatibility (includes -n, +c, +s, ...)\n"); fprintf(stderr," -T : TeX-like \\define{x}{y} \\macro{arg}{...}\n"); fprintf(stderr," -H : HTML-like <#define x|y> <#macro arg|...>\n"); fprintf(stderr," -X : XHTML-like <#define x|y/> <#macro arg|.../>\n"); fprintf(stderr," -P : prolog compatible cpp-like mode\n"); fprintf(stderr," -U : user-defined syntax (specified in 9 following args; see manual)\n"); fprintf(stderr," -M : user-defined syntax for meta-macros (specified in 7 following args)\n\n"); fprintf(stderr," -o : output to outfile\n"); fprintf(stderr," -O : output to outfile and stdout\n"); fprintf(stderr," -z : line terminator is CR-LF (MS-DOS style)\n"); fprintf(stderr," -x : enable #exec built-in macro\n"); fprintf(stderr," -m : enable automatic mode switching upon including .h/.c files\n"); fprintf(stderr," -n : send LF characters serving as macro terminators to output\n"); fprintf(stderr," +c : use next 2 args as comment start and comment end sequences\n"); fprintf(stderr," +s : use next 3 args as string start, end and quote character\n\n"); fprintf(stderr," Long options:\n"); fprintf(stderr," --include file : process file before infile\n"); fprintf(stderr," --nostdinc : don't search standard directories for files to include\n"); fprintf(stderr," --nocurinc : don't search the current directory for files to include\n"); fprintf(stderr," --curdirinclast : search the current directory last\n"); fprintf(stderr," --warninglevel n : set warning level\n"); fprintf(stderr," --includemarker formatstring : keep track of #include directives in output\n\n"); fprintf(stderr," --version : display version information and exit\n"); fprintf(stderr," -h, --help : display this message and exit\n\n"); } int isdelim(unsigned char c) { if (c>=128) return 0; if ((c>='0')&&(c<='9')) return 0; if ((c>='A')&&(c<='Z')) return 0; if ((c>='a')&&(c<='z')) return 0; if (c=='_') return 0; return 1; } int iswhite(char c) { if (c==' ') return 1; if (c=='\t') return 1; if (c=='\n') return 1; return 0; } void newmacro(const char *s,int len,int hasspecs) { if (nmacros==nalloced) { nalloced=2*nalloced+1; macros=realloc(macros,nalloced*sizeof *macros); if (macros==NULL) bug("Out of memory"); } macros[nmacros].username=malloc(len+1); strncpy(macros[nmacros].username,s,len); macros[nmacros].username[len]=0; macros[nmacros].argnames=NULL; macros[nmacros].nnamedargs=0; macros[nmacros].defined_in_comment=0; if (hasspecs) macros[nmacros].define_specs=CloneSpecs(S); else macros[nmacros].define_specs=NULL; } void lookupArgRefs(int n) { int i,l; char *p; if (macros[n].argnames!=NULL) return; /* don't mess with those */ macros[n].nnamedargs=-1; l=strlen(S->User.mArgRef); for (i=0,p=macros[n].macrotext;iUser.quotechar)) { i++; p++; } else if (!strncmp(p,S->User.mArgRef,l)) if ((p[l]>='1')&&(p[l]<='9')) { macros[n].nnamedargs=0; return; } } } char *strnl0(const char *s) /* replace "\\n" by "\n" in a cmd-line arg */ { char *t,*u; t=malloc(strlen(s)+1); u=t; while (*s!=0) { if ((*s=='\\')&&(s[1]=='n')) { *u='\n'; s++; } else *u=*s; s++; u++; } *u=0; return t; } char *strnl(const char *s) /* the same but with whitespace specifier handling */ { char *t,*u; int neg; t=malloc(strlen(s)+1); u=t; if (!isdelim(*s)) bug("character not allowed to start a syntax specifier"); while (*s!=0) { if (((*s&0x60)==0)&&(*s!='\n')&&(*s!='\t')) bug("character not allowed in syntax specifier"); if (*s=='\\') { neg=(s[1]=='!'); switch(s[neg+1]) { case 'n': case 'r': *u='\n'; break; case 't': *u='\t'; break; case 'b': *u='\001'; break; /* one or more spaces */ case 'w': if (neg) bug("\\w and \\W cannot be negated"); *u='\002'; break; /* zero or more spaces */ case 'B': *u='\003'; break; /* one or more spaces or \n */ case 'W': if (neg) bug("\\w and \\W cannot be negated"); *u='\004'; break; /* zero or more spaces or \n */ case 'a': *u='\005'; break; /* alphabetic */ case 'A': *u='\006'; break; /* alphabetic + space */ case '#': *u='\007'; break; /* numeric */ case 'i': *u='\010'; break; /* identifier */ case 'o': *u='\013'; break; /* operator */ case 'O': *u='\014'; break; /* operator/parenthese */ default: *u='\\'; neg=-1; } if (neg>0) *u+=(char)128; s+=neg+1; } else if (*s==' ') *u='\001'; else *u=*s; s++; u++; } *u=0; return t; } /* same as strnl() but for C strings & in-place */ char *strnl2(char *s,int check_delim) { char *u; int neg; u=s; if (check_delim&&!isdelim(*s)) bug("character not allowed to start a syntax specifier"); while (*s!='"') { if (((*s&0x60)==0)&&(*s!='\n')&&(*s!='\t')) bug("character not allowed in syntax specifier"); if (*s=='\\') { neg=(s[1]=='!'); switch(s[neg+1]) { case 'n': case 'r': *u='\n'; break; case 't': *u='\t'; break; case 'b': *u='\001'; break; /* one or more spaces */ case 'w': if (neg) bug("\\w and \\W cannot be negated"); *u='\002'; break; /* zero or more spaces */ case 'B': *u='\003'; break; /* one or more spaces or \n */ case 'W': if (neg) bug("\\w and \\W cannot be negated"); *u='\004'; break; /* zero or more spaces or \n */ case 'a': *u='\005'; break; /* alphabetic */ case 'A': *u='\006'; break; /* alphabetic + space */ case '#': *u='\007'; break; /* numeric */ case 'i': *u='\010'; break; /* identifier */ case 'o': *u='\013'; break; /* operator */ case 'O': *u='\014'; break; /* operator/parenthese */ case '"': case '\\': if (!neg) { *u=s[1]; break; } default: bug("unknown escape sequence in syntax specifier"); } if (neg>0) *u+=(char)128; s+=neg+1; } else if (*s==' ') *u='\001'; else *u=*s; if (*s==0) bug("unterminated string in #mode command"); s++; u++; } *u=0; return (s+1); } int iswhitesep(const char *s) { while (iswhite(*s)||(*s=='\001')||(*s=='\002')||(*s=='\003')||(*s=='\004')) s++; return (*s==0); } int nowhite_strcmp(char *s,char *t) { char *p; while (iswhite(*s)) s++; while (iswhite(*t)) t++; if ((*s==0)||(*t==0)) return strcmp(s,t); p=s+strlen(s)-1; while (iswhite(*p)) *(p--)=0; p=t+strlen(t)-1; while (iswhite(*p)) *(p--)=0; return strcmp(s,t); } void parseCmdlineDefine(const char *s) { int l, i, argc; for (l=0;s[l]&&(s[l]!='=')&&(s[l]!='(');l++); i = findIdent(s,l); if (i>=0) delete_macro(i); newmacro(s,l,0); /* possibly allow named arguments: -Dmacro(arg1,arg2)=... (no spaces) */ if (s[l]=='(') { argc = 0; do { l++; i=l; while (!isdelim(s[i])) i++; if (s[i]!=',' && s[i]!=')') bug("invalid syntax in -D declaration"); if (i>l) argc++; macros[nmacros].argnames = realloc(macros[nmacros].argnames, (argc+1)*sizeof(char *)); if (i>l) { macros[nmacros].argnames[argc-1]=malloc(i-l+1); memcpy(macros[nmacros].argnames[argc-1], s+l, i-l); macros[nmacros].argnames[argc-1][i-l]=0; } l = i; } while (s[l]!=')'); l++; macros[nmacros].nnamedargs = argc; macros[nmacros].argnames[argc] = NULL; } /* the macro definition afterwards ! */ if (s[l]=='=') l++; else if (s[l]!=0) bug("invalid syntax in -D declaration"); macros[nmacros].macrolen=strlen(s+l); macros[nmacros++].macrotext=my_strdup(s+l); } int readModeDescription(char **args,struct MODE *mode,int ismeta) { if (!(*(++args))) return 0; mode->mStart=strnl(*args); if (!(*(++args))) return 0; mode->mEnd=strnl(*args); if (!(*(++args))) return 0; mode->mArgS=strnl(*args); if (!(*(++args))) return 0; mode->mArgSep=strnl(*args); if (!(*(++args))) return 0; mode->mArgE=strnl(*args); if (!(*(++args))) return 0; mode->stackchar=strnl(*args); if (!(*(++args))) return 0; mode->unstackchar=strnl(*args); if (ismeta) return 1; if (!(*(++args))) return 0; mode->mArgRef=strnl(*args); if (!(*(++args))) return 0; mode->quotechar=**args; return 1; } int parse_comment_specif(char c) { switch (c) { case 'I': case 'i': return FLAG_IGNORE; case 'c': return FLAG_COMMENT; case 's': return FLAG_STRING; case 'q': return OUTPUT_TEXT; case 'S': return FLAG_STRING|PARSE_MACROS; case 'Q': return OUTPUT_TEXT|PARSE_MACROS; case 'C': return FLAG_COMMENT|PARSE_MACROS; default: bug("Invalid comment/string modifier"); return 0; } } void add_comment(struct SPECS *S,const char *specif,char *start,char *end,char quote,char warn) { struct COMMENT *p; if (*start==0) bug("Comment/string start delimiter must be non-empty"); for (p=S->comments;p!=NULL;p=p->next) if (!strcmp(p->start,start)) { if (strcmp(p->end,end)) /* already exists with a different end */ bug("Conflicting comment/string delimiter specifications"); free(p->start); free(p->end); break; } if (p==NULL) { p=malloc(sizeof *p); p->next=S->comments; S->comments=p; } p->start=start; p->end=end; p->quote=quote; p->warn=warn; if (strlen(specif)!=3) bug("Invalid comment/string modifier"); p->flags[FLAG_META]=parse_comment_specif(specif[0]); p->flags[FLAG_USER]=parse_comment_specif(specif[1]); p->flags[FLAG_TEXT]=parse_comment_specif(specif[2]); } void delete_comment(struct SPECS *S,char *start) { struct COMMENT *p,*q; q=NULL; for (p=S->comments;p!=NULL;p=p->next) { if (!strcmp(p->start,start)) { if (q==NULL) S->comments=p->next; else q->next=p->next; free(p->start); free(p->end); free(p); free(start); return; } else q=p; } free(start); } void outchar(char c) { if (C->out->bufsize) { if (C->out->len+1==C->out->bufsize) { C->out->bufsize=C->out->bufsize*2; C->out->buf=realloc(C->out->buf,C->out->bufsize); if (C->out->buf==NULL) bug("Out of memory"); } C->out->buf[C->out->len++]=c; } else { if (dosmode&&(c==10)) { fputc(13,C->out->f); if (file_and_stdout) fputc(13,stdout); } if (c!=13) { fputc(c,C->out->f); if (file_and_stdout) fputc(c,stdout); } } } void sendout(const char *s,int l,int proc) /* only process the quotechar, that's all */ { int i; if (!commented[iflevel]) for (i=0;iUser.quotechar)) { i++; if (i==l) return; } if (s[i]!=0) outchar(s[i]); } else replace_definition_with_blank_lines(s, s+l-1, 0); } void extendBuf(int pos) { char *p; if (C->bufsize<=pos) { C->bufsize+=pos; /* approx double */ p=malloc(C->bufsize); memcpy(p,C->buf,C->len); free(C->malloced_buf); C->malloced_buf=C->buf=p; if (C->buf==NULL) bug("Out of memory"); } } char getChar(int pos) { static int lastchar = -666; int c; if (lastchar == -666 && !strcmp(S->Meta.mEnd, "\n")) lastchar='\n'; if (C->in==NULL) { if (pos>=C->len) return 0; else return C->buf[pos]; } extendBuf(pos); while (pos>=C->len) { do { c=fgetc(C->in); } while (c==13); if (lastchar=='\n') C->lineno++; lastchar=c; if (c==EOF) c=0; C->buf[C->len++]=(char)c; } return C->buf[pos]; } int whiteout(int *pos1,int *pos2) /* remove whitespace on both sides */ { while ((*pos1<*pos2)&&iswhite(getChar(*pos1))) (*pos1)++; while ((*pos1<*pos2)&&iswhite(getChar(*pos2-1))) (*pos2)--; return (*pos1<*pos2); } int identifierEnd(int start) { char c; c=getChar(start); if (c==0) return start; if (c==S->User.quotechar) { c=getChar(start+1); if (c==0) return (start+1); if (isdelim(c)) return (start+2); start+=2; c=getChar(start); } while (!isdelim(c)) c=getChar(++start); return start; } int iterIdentifierEnd(int start) { int x; while(1) { x=identifierEnd(start); if (x==start) return x; start=x; } } int IsInCharset(CHARSET_SUBSET x,int c) { return (x[c>>LOG_LONG_BITS] & 1L<<(c&((1<='a')&&(c<='z')) || ((c>='A')&&(c<='Z')) ||(c==' ')||(c=='\t')||(c=='\n'); break; case '\005': c=getChar(i++); match = ((c>='a')&&(c<='z')) || ((c>='A')&&(c<='Z')); break; case '\007': c=getChar(i++); match = ((c>='0')&&(c<='9')); break; case '\010': c=getChar(i++); match = IsInCharset(S->id_set,c); break; case '\011': c=getChar(i++); match = (c=='\t'); break; case '\012': c=getChar(i++); match = (c=='\n'); break; case '\013': c=getChar(i++); match = IsInCharset(S->op_set,c); break; case '\014': c=getChar(i++); match = IsInCharset(S->ext_op_set,c) || IsInCharset(S->op_set,c); break; } if ((*s)&0x80) match=!match; if (!match) return 0; } else if (getChar(i++)!=*s) return 0; s++; } *pos=i; return 1; } int matchEndSequence(const char *s,int *pos) { if (*s==0) return 1; /* if terminator is \n and we're at end of input, let it be... */ if (getChar(*pos)==0 && s[0]=='\n' && s[1]==0) return 1; if (!matchSequence(s,pos)) return 0; if (S->preservelf&&iswhite(getChar(*pos-1))) (*pos)--; return 1; } int matchStartSequence(const char *s,int *pos) { char c; int match; if (!((*s)&0x60)) { /* special sequences from prev. context */ c=getChar(*pos-1); match=1; if (*s==0) return 1; switch((*s)&0x1f) { case '\001': if ((c!=' ')&&(c!='\t')) { match=0; break; } case '\002': break; case '\003': if ((c!=' ')&&(c!='\t')&&(c!='\n')) { match=0; break; } case '\004': break; case '\006': if ((c==' ')||(c=='\t')||(c=='\n')) break; case '\005': match = ((c>='a')&&(c<='z')) || ((c>='A')&&(c<='Z')); break; case '\007': match = ((c>='0')&&(c<='9')); break; case '\010': match = IsInCharset(S->id_set,c); break; case '\011': match = (c=='\t'); break; case '\012': match = (c=='\n'); break; case '\013': match = IsInCharset(S->op_set,c); break; case '\014': match = IsInCharset(S->ext_op_set,c) || IsInCharset(S->op_set,c); break; } if ((*s)&0x80) match=!match; if (!match) return 0; s++; } return matchSequence(s,pos); } void AddToCharset(CHARSET_SUBSET x,int c) { x[c>>LOG_LONG_BITS] |= 1L<<(c&((1<=*s)) { for (c=*s;c<=s[2];c++) AddToCharset(x,c); s+=2; } else AddToCharset(x,*s); s++; } return x; } int idequal(const char *b,int l,const char *s) { int i; if ((int)strlen(s)!=l) return 0; for (i=0;inamedargs[i]; if (s==NULL) return -1; if (idequal(b,l,s)) return i; } } void shiftIn(int l) { int i; if (l<=1) return; l--; if (l>=C->len) C->len=0; else { if (C->len-l>100) { /* we want to shrink that buffer */ C->buf+=l; C->bufsize-=l; } else for (i=l;ilen;i++) C->buf[i-l]=C->buf[i]; C->len-=l; C->eof=(C->buf[0]==0); } if (C->len<=1) { if (C->in==NULL) C->eof=1; else C->eof=feof(C->in); } } void initthings(int argc, char **argv) { char **arg, *s; int i,isinput,isoutput,ishelp,ismode,hasmeta,usrmode; DefaultOp=MakeCharsetSubset(DEFAULT_OP_STRING); PrologOp=MakeCharsetSubset(PROLOG_OP_STRING); DefaultExtOp=MakeCharsetSubset(DEFAULT_OP_PLUS); DefaultId=MakeCharsetSubset(DEFAULT_ID_STRING); nmacros=0; nalloced=31; macros=malloc(nalloced*sizeof *macros); S=malloc(sizeof *S); S->User=CUser; S->Meta=CMeta; S->comments=NULL; S->stack_next=NULL; S->preservelf=0; S->op_set=DefaultOp; S->ext_op_set=DefaultExtOp; S->id_set=DefaultId; C=malloc(sizeof *C); C->in=stdin; C->argc=0; C->argv=NULL; C->filename=my_strdup("stdin"); C->out=malloc(sizeof *(C->out)); C->out->f=stdout; C->out->bufsize=0; C->lineno=1; isinput=isoutput=ismode=ishelp=hasmeta=usrmode=0; nincludedirs=0; C->bufsize=80; C->len=0; C->buf=C->malloced_buf=malloc(C->bufsize); C->eof=0; C->namedargs=NULL; C->in_comment=0; C->ambience=FLAG_TEXT; C->may_have_args=0; commented[0]=0; iflevel=0; execallowed=0; autoswitch=0; dosmode=DEFAULT_CRLF; for (arg=argv+1;*arg;arg++) { if (strcmp(*arg, "--help") == 0 || strcmp(*arg, "-h") == 0) { usage(); exit(EXIT_SUCCESS); } if (strcmp(*arg, "--version") == 0) { display_version(); exit(EXIT_SUCCESS); } #define DEPRECATED_WARNING fprintf(stderr, "gpp: warning: deprecated option `%s'; use `-%s' instead\n", *arg, *arg) if (strcmp(*arg, "-nostdinc") == 0) { DEPRECATED_WARNING; NoStdInc = 1; continue; } if (strcmp(*arg, "-nocurinc") == 0) { DEPRECATED_WARNING; NoCurIncFirst = 1; continue; } if (strcmp(*arg, "-curdirinclast") == 0) { DEPRECATED_WARNING; CurDirIncLast = 1; NoCurIncFirst = 1; continue; } if (strcmp(*arg, "-includemarker") == 0) { DEPRECATED_WARNING; if (!(*(++arg))) { usage(); exit(EXIT_FAILURE); } construct_include_directive_marker(&include_directive_marker, *arg); continue; } if (strcmp(*arg, "--include") == 0) { if (!(*(++arg))) { usage(); exit(EXIT_FAILURE); } IncludeFile = *arg; continue; } if (strcmp(*arg, "-warninglevel") == 0) { DEPRECATED_WARNING; if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} WarningLevel = atoi(*arg); continue; } if (strcmp(*arg, "--nostdinc") == 0) { NoStdInc = 1; continue; } if (strcmp(*arg, "--nocurinc") == 0) { NoCurIncFirst = 1; continue; } if (strcmp(*arg, "--curdirinclast") == 0) { CurDirIncLast = 1; NoCurIncFirst = 1; continue; } if (strcmp(*arg, "--includemarker") == 0) { if (!(*(++arg))) { usage(); exit(EXIT_FAILURE); } construct_include_directive_marker(&include_directive_marker, *arg); continue; } if (strcmp(*arg, "--warninglevel") == 0) { if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} WarningLevel = atoi(*arg); continue; } if (**arg=='+') { switch((*arg)[1]) { case 'c': s=(*arg)+2; if (*s==0) s="ccc"; if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} add_comment(S,s,strnl(*(arg-1)),strnl(*arg),0,0); break; case 's': s=(*arg)+2; if (*s==0) s="sss"; if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} add_comment(S,s,strnl(*(arg-2)),strnl(*(arg-1)),**arg,0); break; case 'z': dosmode=0; break; case 'n': S->preservelf=0; break; default: ishelp=1; } } else if (**arg!='-') { ishelp|=isinput; isinput=1; C->in=fopen(*arg,"r"); free(C->filename); C->filename=my_strdup(*arg); if (C->in==NULL) bug("Cannot open input file"); } else switch((*arg)[1]) { case 'I': if (nincludedirs==MAXINCL) bug("too many include directories"); if ((*arg)[2]==0) { if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} includedir[nincludedirs++]=my_strdup(*arg); } else includedir[nincludedirs++]=my_strdup((*arg)+2); break; case 'C': ishelp|=ismode|hasmeta|usrmode; ismode=1; S->User=KUser; S->Meta=KMeta; S->preservelf=1; add_comment(S,"ccc",my_strdup("/*"),my_strdup("*/"),0,0); add_comment(S,"ccc",my_strdup("//"),my_strdup("\n"),0,0); add_comment(S,"ccc",my_strdup("\\\n"),my_strdup(""),0,0); add_comment(S,"sss",my_strdup("\""),my_strdup("\""),'\\','\n'); add_comment(S,"sss",my_strdup("'"),my_strdup("'"),'\\','\n'); break; case 'P': ishelp|=ismode|hasmeta|usrmode; ismode=1; S->User=KUser; S->Meta=KMeta; S->preservelf=1; S->op_set=PrologOp; add_comment(S,"css",my_strdup("\213/*"),my_strdup("*/"),0,0); /* \!o */ add_comment(S,"cii",my_strdup("\\\n"),my_strdup(""),0,0); add_comment(S,"css",my_strdup("%"),my_strdup("\n"),0,0); add_comment(S,"sss",my_strdup("\""),my_strdup("\""),0,'\n'); add_comment(S,"sss",my_strdup("\207'"),my_strdup("'"),0,'\n'); /* \!# */ break; case 'T': ishelp|=ismode|hasmeta|usrmode; ismode=1; S->User=S->Meta=Tex; break; case 'H': ishelp|=ismode|hasmeta|usrmode; ismode=1; S->User=S->Meta=Html; break; case 'X': ishelp|=ismode|hasmeta|usrmode; ismode=1; S->User=S->Meta=XHtml; break; case 'U': ishelp|=ismode|usrmode; usrmode=1; if (!readModeDescription(arg,&(S->User),0)) {usage(); exit(EXIT_FAILURE);} arg+=9; if (!hasmeta) S->Meta=S->User; break; case 'M': ishelp|=ismode|hasmeta; hasmeta=1; if (!readModeDescription(arg,&(S->Meta),1)) {usage(); exit(EXIT_FAILURE);} arg+=7; break; case 'O': file_and_stdout = 1; case 'o': if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} ishelp|=isoutput; isoutput=1; C->out->f=fopen(*arg,"w"); if (C->out->f==NULL) bug("Cannot create output file"); break; case 'D': if ((*arg)[2]==0) { if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} s=strnl0(*arg); } else s=strnl0((*arg)+2); parseCmdlineDefine(s); free(s); break; case 'x': execallowed=1; break; case 'n': S->preservelf=1; break; case 'z': dosmode=1; break; case 'c': case 's': if (!(*(++arg))) {usage(); exit(EXIT_FAILURE);} delete_comment(S,strnl(*arg)); break; case 'm': autoswitch=1; break; default: ishelp=1; } if (hasmeta&&!usrmode) {usage(); exit(EXIT_FAILURE);} if (ishelp) {usage(); exit(EXIT_FAILURE);} } #ifndef WIN_NT if ((nincludedirs==0) && !NoStdInc) { includedir[0]=my_strdup("/usr/include"); nincludedirs=1; } #endif for (i=0;i 1) warning("possible comment/string termination problem"); } if (c==quote) pos+=2; else if ((flags&PARSE_MACROS)&&(c==S->User.quotechar)) pos+=2; else pos++; } } void SkipPossibleComments(int *pos,int cmtmode,int silentonly) { int found; struct COMMENT *c; if (C->in_comment) return; do { found=0; if (getChar(*pos)==0) return; /* EOF */ for (c=S->comments;c!=NULL;c=c->next) if (!(c->flags[cmtmode]&FLAG_IGNORE)) if (!silentonly||(c->flags[cmtmode]==FLAG_COMMENT)) if (matchStartSequence(c->start,pos)) { *pos=findCommentEnd(c->end,c->quote,c->warn,*pos,c->flags[cmtmode]); matchEndSequence(c->end,pos); found=1; break; } } while (found); } /* look for a possible user macro. Input : idstart = scan start idcheck = check id for long macro forms before splicing args ? cmtmode = comment mode (FLAG_META or FLAG_USER) Output : idstart/idend = macro name location sh_end/lg_end = macro form end (-1 if no match) argb/arge = argument locations for long form argc = argument count for long form id = macro id, if idcheck was set at input */ int SplicePossibleUser(int *idstart,int *idend,int *sh_end,int *lg_end, int *argb,int *arge,int *argc,int idcheck, int *id,int cmtmode) { int match,k,pos; if (!matchStartSequence(S->User.mStart,idstart)) return 0; *idend=identifierEnd(*idstart); if ((*idend)&&!getChar(*idend-1)) return 0; /* look for args or no args */ *sh_end=*idend; if (!matchEndSequence(S->User.mEnd,sh_end)) *sh_end=-1; pos=*idend; match=matchSequence(S->User.mArgS,&pos); if (idcheck) { *id=findIdent(C->buf+*idstart,*idend-*idstart); if (*id<0) match=0; } *lg_end=-1; if (match) { *argc=0; while (1) { if (*argc>=MAXARGS) bug("too many macro parameters"); argb[*argc]=pos; k=0; while(1) { /* look for mArgE, mArgSep, or comment-start */ pos=iterIdentifierEnd(pos); SkipPossibleComments(&pos,cmtmode,0); if (getChar(pos)==0) return (*sh_end>=0); /* EOF */ if (strchr(S->User.stackchar,getChar(pos))) k++; if (k) { if (strchr(S->User.unstackchar,getChar(pos))) k--; } else { arge[*argc]=pos; if (matchSequence(S->User.mArgSep,&pos)) { match=0; break; } if (matchEndSequence(S->User.mArgE,&pos)) { match=1; break; } } pos++; /* nothing matched, go forward */ } (*argc)++; if (match) { /* no more args */ *lg_end=pos; break; } } } return ((*lg_end>=0)||(*sh_end>=0)); } int findMetaArgs(int start,int *p1b,int *p1e,int *p2b,int *p2e,int *endm,int *argc,int *argb,int *arge) { int pos,k; int hyp_end1,hyp_end2; /* look for mEnd or mArgS */ pos=start; if (!matchSequence(S->Meta.mArgS,&pos)) { if (!matchEndSequence(S->Meta.mEnd,&pos)) return -1; *endm=pos; return 0; } *p1b=pos; /* special syntax for #define : 1st arg is a macro call */ if ((*argc)&&SplicePossibleUser(&pos,p1e,&hyp_end1,&hyp_end2, argb,arge,argc,0,NULL,FLAG_META)) { *p1b=pos; if (hyp_end2>=0) pos=hyp_end2; else { pos=hyp_end1; *argc=0; } if (!matchSequence(S->Meta.mArgSep,&pos)) { if (!matchEndSequence(S->Meta.mArgE,&pos)) bug("#define/#defeval requires an identifier or a single macro call"); *endm=pos; return 1; } } else { *argc=0; k=0; while(1) { /* look for mArgE, mArgSep, or comment-start */ pos=iterIdentifierEnd(pos); SkipPossibleComments(&pos,FLAG_META,0); if (getChar(pos)!=0 && strchr(S->Meta.stackchar,getChar(pos))) k++; if (k) { if (getChar(pos)!=0 && strchr(S->Meta.unstackchar,getChar(pos))) k--; } else { *p1e=pos; if (matchSequence(S->Meta.mArgSep,&pos)) break; if (matchEndSequence(S->Meta.mArgE,&pos)) { *endm=pos; return 1; } } if (getChar(pos)==0) bug("unfinished macro argument"); pos++; /* nothing matched, go forward */ } } *p2b=pos; k=0; while(1) { /* look for mArgE or comment-start */ pos=iterIdentifierEnd(pos); SkipPossibleComments(&pos,FLAG_META,0); if (getChar(pos)!=0 && strchr(S->Meta.stackchar,getChar(pos))) k++; if (k) { if (getChar(pos)!=0 && strchr(S->Meta.unstackchar,getChar(pos))) k--; } else { *p2e=pos; if (matchEndSequence(S->Meta.mArgE,&pos)) break; } if (getChar(pos)==0) bug("unfinished macro"); pos++; /* nothing matched, go forward */ } *endm=pos; return 2; } char *ProcessText(const char *buf,int l,int ambience) { char *s; struct INPUTCONTEXT *T; if (l==0) { s=malloc(1); s[0]=0; return s; } s=malloc(l+2); s[0]='\n'; memcpy(s+1,buf,l); s[l+1]=0; T=C; C=malloc(sizeof *C); C->out=malloc(sizeof *(C->out)); C->in=NULL; C->argc=T->argc; C->argv=T->argv; C->filename=T->filename; C->out->buf=malloc(80); C->out->len=0; C->out->bufsize=80; C->out->f=NULL; C->lineno=T->lineno; C->bufsize=l+2; C->len=l+1; C->buf=C->malloced_buf=s; C->eof=0; C->namedargs=T->namedargs; C->in_comment=T->in_comment; C->ambience=ambience; C->may_have_args=T->may_have_args; ProcessContext(); outchar(0); /* note that outchar works with the half-destroyed context ! */ s=C->out->buf; free(C->out); free(C); C=T; return s; } int SpliceInfix(const char *buf,int pos1,int pos2,char *sep,int *spl1,int *spl2) { int pos,numpar,l; const char *p; numpar=0; l=strlen(sep); for (pos=pos2-1,p=buf+pos;pos>=pos1;pos--,p--) { if (*p==')') numpar++; if (*p=='(') numpar--; if (numpar<0) return 0; if ((numpar==0)&&(pos2-pos>=l)&&!strncmp(p,sep,l)) { *spl1=pos; *spl2=pos+l; return 1; } } return 0; } int DoArithmEval(char *buf,int pos1,int pos2,int *result) { int spl1,spl2,result1,result2,l; char c,*p; while ((pos1spl2)&&iswhite(buf[spl2])) spl2++; str1=strdup(buf+pos1); str1[spl1-pos1]='\0'; str2=strdup(buf+spl2); str2[pos2-spl2]='\0'; *result=(fnmatch(str2,str1,0)==0); free(str1); free(str2); } else *result=(result1==result2); return 1; } if (SpliceInfix(buf,pos1,pos2,">=",&spl1,&spl2)) { if (!DoArithmEval(buf,pos1,spl1,&result1)|| !DoArithmEval(buf,spl2,pos2,&result2)) { /* revert to string comparison */ while ((pos1spl2)&&iswhite(buf[spl2])) spl2++; l=spl1-pos1; if (l>pos2-spl2) l=pos2-spl2; result1=strncmp(buf+pos1,buf+spl2,l); *result=(result1>0) || ((result1==0) && (spl1-pos1>=pos2-spl2)); } else *result=(result1>=result2); return 1; } if (SpliceInfix(buf,pos1,pos2,">",&spl1,&spl2)) { if (!DoArithmEval(buf,pos1,spl1,&result1)|| !DoArithmEval(buf,spl2,pos2,&result2)) { /* revert to string comparison */ while ((pos1spl2)&&iswhite(buf[spl2])) spl2++; l=spl1-pos1; if (l>pos2-spl2) l=pos2-spl2; result1=strncmp(buf+pos1,buf+spl2,l); *result=(result1>0) || ((result1==0) && (spl1-pos1>pos2-spl2)); } else *result=(result1>result2); return 1; } if (SpliceInfix(buf,pos1,pos2,"<=",&spl1,&spl2)) { if (!DoArithmEval(buf,pos1,spl1,&result1)|| !DoArithmEval(buf,spl2,pos2,&result2)) { /* revert to string comparison */ while ((pos1spl2)&&iswhite(buf[spl2])) spl2++; l=spl1-pos1; if (l>pos2-spl2) l=pos2-spl2; result1=strncmp(buf+pos1,buf+spl2,l); *result=(result1<0) || ((result1==0) && (spl1-pos1<=pos2-spl2)); } else *result=(result1<=result2); return 1; } if (SpliceInfix(buf,pos1,pos2,"<",&spl1,&spl2)) { if (!DoArithmEval(buf,pos1,spl1,&result1)|| !DoArithmEval(buf,spl2,pos2,&result2)) { /* revert to string comparison */ while ((pos1spl2)&&iswhite(buf[spl2])) spl2++; l=spl1-pos1; if (l>pos2-spl2) l=pos2-spl2; result1=strncmp(buf+pos1,buf+spl2,l); *result=(result1<0) || ((result1==0) && (spl1-pos1=0) warning("the defined(...) macro is already defined"); else { newmacro("defined",strlen("defined"),1); macros[nmacros].macrolen=0; macros[nmacros].macrotext=malloc(1); macros[nmacros].macrotext[0]=0; macros[nmacros].nnamedargs=-2; /* trademark of the defined(...) macro */ nmacros++; } /* process the text in a usual way */ s=ProcessText(C->buf+pos1,pos2-pos1,FLAG_META); /* undefine the defined(...) operator */ if (i<0) { i=findIdent("defined",strlen("defined")); if ((i<0)||(macros[i].nnamedargs!=-2)) warning("the defined(...) macro was redefined in expression"); else delete_macro(i); } if (!DoArithmEval(s,0,strlen(s),&i)) return s; /* couldn't compute */ t=malloc(MAX_GPP_NUM_SIZE); sprintf(t,"%d",i); free(s); return t; } int comment_or_white(int start,int end,int cmtmode) { char c; while (startUser.quotechar)&&(startop_set=DefaultOp; P->ext_op_set=DefaultExtOp; P->id_set=DefaultId; FreeComments(P); if (!strcmp(opt,"C")||!strcmp(opt,"cpp")) { P->User=KUser; P->Meta=KMeta; P->preservelf=1; add_comment(P,"ccc",my_strdup("/*"),my_strdup("*/"),0,0); add_comment(P,"ccc",my_strdup("//"),my_strdup("\n"),0,0); add_comment(P,"ccc",my_strdup("\\\n"),my_strdup(""),0,0); add_comment(P,"sss",my_strdup("\""),my_strdup("\""),'\\','\n'); add_comment(P,"sss",my_strdup("'"),my_strdup("'"),'\\','\n'); } else if (!strcmp(opt,"TeX")||!strcmp(opt,"tex")) { P->User=Tex; P->Meta=Tex; P->preservelf=0; } else if (!strcmp(opt,"HTML")||!strcmp(opt,"html")) { P->User=Html; P->Meta=Html; P->preservelf=0; } else if (!strcmp(opt,"XHTML")||!strcmp(opt,"xhtml")) { P->User=XHtml; P->Meta=XHtml; P->preservelf=0; } else if (!strcmp(opt,"default")) { P->User=CUser; P->Meta=CMeta; P->preservelf=0; } else if (!strcmp(opt,"Prolog")||!strcmp(opt,"prolog")) { P->User=KUser; P->Meta=KMeta; P->preservelf=1; P->op_set=PrologOp; add_comment(P,"css",my_strdup("\213/*"),my_strdup("*/"),0,0); /* \!o */ add_comment(P,"cii",my_strdup("\\\n"),my_strdup(""),0,0); add_comment(P,"css",my_strdup("%"),my_strdup("\n"),0,0); add_comment(P,"sss",my_strdup("\""),my_strdup("\""),0,'\n'); add_comment(P,"sss",my_strdup("\207'"),my_strdup("'"),0,'\n'); /* \!# */ } else bug("unknown standard mode"); } void ProcessModeCommand(int p1start,int p1end,int p2start,int p2end) { struct SPECS *P; char *s,*p,*opt; int nargs,check_isdelim; char *args[10]; /* can't have more than 10 arguments */ whiteout(&p1start,&p1end); if ((p1start==p1end)||(identifierEnd(p1start)!=p1end)) bug("invalid #mode syntax"); if (p2start<0) s=my_strdup(""); else s=ProcessText(C->buf+p2start,p2end-p2start,FLAG_META); /* argument parsing */ p=s; opt=NULL; while (iswhite(*p)) p++; if ((*p!='"')&&(*p!=0)) { opt=p; while ((*p!=0)&&!iswhite(*p)) p++; if (*p!=0) { *(p++)=0; while (iswhite(*p)) p++; } } nargs=0; check_isdelim=!idequal(C->buf+p1start,p1end-p1start,"charset"); while (*p!=0) { if (nargs==10) bug("too many arguments in #mode command"); if (*(p++)!='"') bug("syntax error in #mode command (missing \" or trailing data)"); args[nargs++]=p; p=strnl2(p,check_isdelim); while (iswhite(*p)) p++; } if (idequal(C->buf+p1start,p1end-p1start,"quote")) { if (opt||(nargs>1)) bug("syntax error in #mode quote command"); if (nargs==0) args[0]=""; S->stack_next->User.quotechar=args[0][0]; } else if (idequal(C->buf+p1start,p1end-p1start,"comment")) { if ((nargs<2)||(nargs>4)) bug("syntax error in #mode comment command"); if (!opt) opt="ccc"; if (nargs<3) args[2]=""; if (nargs<4) args[3]=""; add_comment(S->stack_next,opt,my_strdup(args[0]),my_strdup(args[1]),args[2][0],args[3][0]); } else if (idequal(C->buf+p1start,p1end-p1start,"string")) { if ((nargs<2)||(nargs>4)) bug("syntax error in #mode string command"); if (!opt) opt="sss"; if (nargs<3) args[2]=""; if (nargs<4) args[3]=""; add_comment(S->stack_next,opt,my_strdup(args[0]),my_strdup(args[1]),args[2][0],args[3][0]); } else if (idequal(C->buf+p1start,p1end-p1start,"save") ||idequal(C->buf+p1start,p1end-p1start,"push")) { if ((opt!=NULL)||nargs) bug("too many arguments to #mode save"); P=CloneSpecs(S->stack_next); P->stack_next=S->stack_next; S->stack_next=P; } else if (idequal(C->buf+p1start,p1end-p1start,"restore") ||idequal(C->buf+p1start,p1end-p1start,"pop")) { if ((opt!=NULL)||nargs) bug("too many arguments to #mode restore"); P=S->stack_next->stack_next; if (P==NULL) bug("#mode restore without #mode save"); FreeComments(S->stack_next); free(S->stack_next); S->stack_next=P; } else if (idequal(C->buf+p1start,p1end-p1start,"standard")) { if ((opt==NULL)||nargs) bug("syntax error in #mode standard"); SetStandardMode(S->stack_next,opt); } else if (idequal(C->buf+p1start,p1end-p1start,"user")) { if ((opt!=NULL)||(nargs!=9)) bug("#mode user requires 9 arguments"); S->stack_next->User.mStart=my_strdup(args[0]); S->stack_next->User.mEnd=my_strdup(args[1]); S->stack_next->User.mArgS=my_strdup(args[2]); S->stack_next->User.mArgSep=my_strdup(args[3]); S->stack_next->User.mArgE=my_strdup(args[4]); S->stack_next->User.stackchar=my_strdup(args[5]); S->stack_next->User.unstackchar=my_strdup(args[6]); S->stack_next->User.mArgRef=my_strdup(args[7]); S->stack_next->User.quotechar=args[8][0]; } else if (idequal(C->buf+p1start,p1end-p1start,"meta")) { if ((opt!=NULL)&&!nargs&&!strcmp(opt,"user")) S->stack_next->Meta=S->stack_next->User; else { if ((opt!=NULL)||(nargs!=7)) bug("#mode meta requires 7 arguments"); S->stack_next->Meta.mStart=my_strdup(args[0]); S->stack_next->Meta.mEnd=my_strdup(args[1]); S->stack_next->Meta.mArgS=my_strdup(args[2]); S->stack_next->Meta.mArgSep=my_strdup(args[3]); S->stack_next->Meta.mArgE=my_strdup(args[4]); S->stack_next->Meta.stackchar=my_strdup(args[5]); S->stack_next->Meta.unstackchar=my_strdup(args[6]); } } else if (idequal(C->buf+p1start,p1end-p1start,"preservelf")) { if ((opt==NULL)||nargs) bug("syntax error in #mode preservelf"); if (!strcmp(opt,"1")||!my_strcasecmp(opt,"on")) S->stack_next->preservelf=1; else if (!strcmp(opt,"0")||!my_strcasecmp(opt,"off")) S->stack_next->preservelf=0; else bug("#mode preservelf requires on/off argument"); } else if (idequal(C->buf+p1start,p1end-p1start,"nocomment") ||idequal(C->buf+p1start,p1end-p1start,"nostring")) { if ((opt!=NULL)||(nargs>1)) bug("syntax error in #mode nocomment/nostring"); if (nargs==0) FreeComments(S->stack_next); else delete_comment(S->stack_next,my_strdup(args[0])); } else if (idequal(C->buf+p1start,p1end-p1start,"charset")) { if ((opt==NULL)||(nargs!=1)) bug("syntax error in #mode charset"); if (!my_strcasecmp(opt,"op")) S->stack_next->op_set=MakeCharsetSubset((unsigned char *)args[0]); else if (!my_strcasecmp(opt,"par")) S->stack_next->ext_op_set=MakeCharsetSubset((unsigned char *)args[0]); else if (!my_strcasecmp(opt,"id")) S->stack_next->id_set=MakeCharsetSubset((unsigned char *)args[0]); else bug("unknown charset subset name in #mode charset"); } else bug("unrecognized #mode command"); free(s); } static void DoInclude(char *file_name) { struct INPUTCONTEXT *N; char *incfile_name = NULL; FILE *f = NULL; int i, j; int len = strlen(file_name); /* if absolute path name is specified */ if (file_name[0]==SLASH #ifdef WIN_NT || (isalpha(file_name[0]) && file_name[1]==':') #endif ) f=fopen(file_name,"r"); else /* search current dir, if this search isn't turned off */ if (!NoCurIncFirst) { f = openInCurrentDir(file_name); } for (j=0;(f==NULL)&&(jin=f; C->argc=0; C->argv=NULL; C->filename=file_name; C->out=N->out; C->lineno=1; C->bufsize=80; C->len=0; C->buf=C->malloced_buf=malloc(C->bufsize); C->eof=0; C->namedargs=NULL; C->in_comment=0; C->ambience=FLAG_TEXT; C->may_have_args=0; PushSpecs(S); if (autoswitch) { if (!strcmp(file_name+strlen(file_name)-2,".h") || !strcmp(file_name+strlen(file_name)-2,".c")) SetStandardMode(S,"C"); } /* Include marker before the included contents */ write_include_marker(N->out->f, 1, C->filename, "1"); ProcessContext(); /* Include marker after the included contents */ write_include_marker(N->out->f, N->lineno, N->filename, "2"); /* Need to leave the blank line in lieu of #include, like cpp does */ replace_directive_with_blank_line(N->out->f); free(C); PopSpecs(); C=N; } int ParsePossibleMeta(void) { int cklen,nameend; int id,expparams,nparam,i,j; int p1start,p1end,p2start,p2end,macend; int argc,argb[MAXARGS],arge[MAXARGS]; char *tmpbuf; cklen=1; if (!matchStartSequence(S->Meta.mStart,&cklen)) return -1; nameend=identifierEnd(cklen); if (nameend&&!getChar(nameend-1)) return -1; id=0; argc=0; /* for #define with named args */ if (idequal(C->buf+cklen,nameend-cklen,"define")) /* check identifier */ { id=1; expparams=2; argc=1; } else if (idequal(C->buf+cklen,nameend-cklen,"undef")) { id=2; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"ifdef")) { id=3; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"ifndef")) { id=4; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"else")) { id=5; expparams=0; } else if (idequal(C->buf+cklen,nameend-cklen,"endif")) { id=6; expparams=0; } else if (idequal(C->buf+cklen,nameend-cklen,"include")) { id=7; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"exec")) { id=8; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"defeval")) { id=9; expparams=2; argc=1; } else if (idequal(C->buf+cklen,nameend-cklen,"ifeq")) { id=10; expparams=2; } else if (idequal(C->buf+cklen,nameend-cklen,"ifneq")) { id=11; expparams=2; } else if (idequal(C->buf+cklen,nameend-cklen,"eval")) { id=12; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"if")) { id=13; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"mode")) { id=14; expparams=2; } else if (idequal(C->buf+cklen,nameend-cklen,"line")) { id=15; expparams=0; } else if (idequal(C->buf+cklen,nameend-cklen,"file")) { id=16; expparams=0; } else if (idequal(C->buf+cklen,nameend-cklen,"elif")) { id=17; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"error")) { id=18; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"warning")) { id=19; expparams=1; } else if (idequal(C->buf+cklen,nameend-cklen,"date")) { id=20; expparams=1; } else return -1; /* #MODE magic : define "..." to be C-style strings */ if (id==14) { PushSpecs(S); S->preservelf=1; delete_comment(S,my_strdup("\"")); add_comment(S,"sss",my_strdup("\""),my_strdup("\""),'\\','\n'); } nparam=findMetaArgs(nameend,&p1start,&p1end,&p2start,&p2end,&macend,&argc,argb,arge); if (nparam==-1) return -1; if ((nparam==2)&&iswhitesep(S->Meta.mArgSep)) if (comment_or_white(p2start,p2end,FLAG_META)) nparam=1; if ((nparam==1)&&iswhitesep(S->Meta.mArgS)) if (comment_or_white(p1start,p1end,FLAG_META)) nparam=0; if (expparams&&!nparam) bug("Missing argument in meta-macro"); switch(id) { case 1: /* DEFINE */ if (!commented[iflevel]) { whiteout(&p1start,&p1end); /* recall comments are not allowed here */ if ((p1start==p1end)||(identifierEnd(p1start)!=p1end)) bug("#define requires an identifier (A-Z,a-z,0-9,_ only)"); /* buf starts 1 char before the macro */ i=findIdent(C->buf+p1start,p1end-p1start); if (i>=0) delete_macro(i); newmacro(C->buf+p1start,p1end-p1start,1); if (nparam==1) { p2end=p2start=p1end; } replace_definition_with_blank_lines(C->buf+1,C->buf+p2end,S->preservelf); macros[nmacros].macrotext=remove_comments(p2start,p2end,FLAG_META); macros[nmacros].macrolen=strlen(macros[nmacros].macrotext); macros[nmacros].defined_in_comment=C->in_comment; if (argc) { for (j=0;jbuf+argb[j],arge[j]-argb[j]); macros[nmacros].argnames[j][arge[j]-argb[j]]=0; } lookupArgRefs(nmacros++); } else replace_directive_with_blank_line(C->out->f); break; case 2: /* UNDEF */ replace_directive_with_blank_line(C->out->f); if (!commented[iflevel]) { if (nparam==2 && WarningLevel > 0) warning("Extra argument to #undef ignored"); whiteout(&p1start,&p1end); if ((p1start==p1end)||(identifierEnd(p1start)!=p1end)) bug("#undef requires an identifier (A-Z,a-z,0-9,_ only)"); i=findIdent(C->buf+p1start,p1end-p1start); if (i>=0) delete_macro(i); } break; case 3: /* IFDEF */ replace_directive_with_blank_line(C->out->f); iflevel++; if (iflevel==STACKDEPTH) bug("Too many nested #ifdefs"); commented[iflevel]=commented[iflevel-1]; if (!commented[iflevel]) { if (nparam==2 && WarningLevel > 0) warning("Extra argument to #ifdef ignored"); whiteout(&p1start,&p1end); if ((p1start==p1end)||(identifierEnd(p1start)!=p1end)) bug("#ifdef requires an identifier (A-Z,a-z,0-9,_ only)"); i=findIdent(C->buf+p1start,p1end-p1start); commented[iflevel]=(i==-1); } break; case 4: /* IFNDEF */ replace_directive_with_blank_line(C->out->f); iflevel++; if (iflevel==STACKDEPTH) bug("Too many nested #ifdefs"); commented[iflevel]=commented[iflevel-1]; if (!commented[iflevel]) { if (nparam==2 && WarningLevel > 0) warning("Extra argument to #ifndef ignored"); whiteout(&p1start,&p1end); if ((p1start==p1end)||(identifierEnd(p1start)!=p1end)) bug("#ifndef requires an identifier (A-Z,a-z,0-9,_ only)"); i=findIdent(C->buf+p1start,p1end-p1start); commented[iflevel]=(i!=-1); } break; case 5: /* ELSE */ replace_directive_with_blank_line(C->out->f); if (!commented[iflevel] && (nparam>0) && WarningLevel > 0) warning("Extra argument to #else ignored"); if (iflevel==0) bug("#else without #if"); if (!commented[iflevel-1] && commented[iflevel]!=2) commented[iflevel]=!commented[iflevel]; break; case 6: /* ENDIF */ replace_directive_with_blank_line(C->out->f); if (!commented[iflevel] && (nparam>0) && WarningLevel > 0) warning("Extra argument to #endif ignored"); if (iflevel==0) bug("#endif without #if"); iflevel--; break; case 7: /* INCLUDE */ if (!commented[iflevel]) { char *incfile_name; if (nparam==2 && WarningLevel > 0) warning("Extra argument to #include ignored"); if (!whiteout(&p1start,&p1end)) bug("Missing file name in #include"); /* user may put "" or <> */ if (((getChar(p1start)=='\"')&&(getChar(p1end-1)=='\"'))|| ((getChar(p1start)=='<')&&(getChar(p1end-1)=='>'))) { p1start++; p1end--; } if (p1start>=p1end) bug("Missing file name in #include"); incfile_name=malloc(p1end-p1start+1); /* extract the orig include filename */ for (i=0;iout->f); break; case 8: /* EXEC */ if (!commented[iflevel]) { if (!execallowed) warning("Not allowed to #exec. Command output will be left blank"); else { char *s,*t; int c; FILE *f; s=ProcessText(C->buf+p1start,p1end-p1start,FLAG_META); if (nparam==2) { t=ProcessText(C->buf+p2start,p2end-p2start,FLAG_META); i=strlen(s); s=realloc(s,i+strlen(t)+2); s[i]=' '; strcpy(s+i+1,t); free(t); } f=popen(s,"r"); free(s); if (f==NULL) warning("Cannot #exec. Command not found(?)"); else { while ((c=fgetc(f)) != EOF) outchar((char)c); pclose(f); } } } break; case 9: /* DEFEVAL */ if (!commented[iflevel]) { whiteout(&p1start,&p1end); if ((p1start==p1end)||(identifierEnd(p1start)!=p1end)) bug("#defeval requires an identifier (A-Z,a-z,0-9,_ only)"); tmpbuf=ProcessText(C->buf+p2start,p2end-p2start,FLAG_META); i=findIdent(C->buf+p1start,p1end-p1start); if (i>=0) delete_macro(i); newmacro(C->buf+p1start,p1end-p1start,1); if (nparam==1) { p2end=p2start=p1end; } replace_definition_with_blank_lines(C->buf+1,C->buf+p2end,S->preservelf); macros[nmacros].macrotext=tmpbuf; macros[nmacros].macrolen=strlen(macros[nmacros].macrotext); macros[nmacros].defined_in_comment=C->in_comment; if (argc) { for (j=0;jbuf+argb[j],arge[j]-argb[j]); macros[nmacros].argnames[j][arge[j]-argb[j]]=0; } lookupArgRefs(nmacros++); } else replace_directive_with_blank_line(C->out->f); break; case 10: /* IFEQ */ replace_directive_with_blank_line(C->out->f); iflevel++; if (iflevel==STACKDEPTH) bug("Too many nested #ifeqs"); commented[iflevel]=commented[iflevel-1]; if (!commented[iflevel]) { char *s,*t; if (nparam!=2) bug("#ifeq requires two arguments"); s=ProcessText(C->buf+p1start,p1end-p1start,FLAG_META); t=ProcessText(C->buf+p2start,p2end-p2start,FLAG_META); commented[iflevel]=(nowhite_strcmp(s,t)!=0); free(s); free(t); } break; case 11: /* IFNEQ */ replace_directive_with_blank_line(C->out->f); iflevel++; if (iflevel==STACKDEPTH) bug("Too many nested #ifeqs"); commented[iflevel]=commented[iflevel-1]; if (!commented[iflevel]) { char *s,*t; if (nparam!=2) bug("#ifneq requires two arguments"); s=ProcessText(C->buf+p1start,p1end-p1start,FLAG_META); t=ProcessText(C->buf+p2start,p2end-p2start,FLAG_META); commented[iflevel]=(nowhite_strcmp(s,t)==0); free(s); free(t); } break; case 12: /* EVAL */ if (!commented[iflevel]) { char *s,*t; if (nparam==2) p1end=p2end; /* we really want it all ! */ s=ArithmEval(p1start,p1end); for (t=s;*t;t++) outchar(*t); free(s); } break; case 13: /* IF */ replace_directive_with_blank_line(C->out->f); iflevel++; if (iflevel==STACKDEPTH) bug("Too many nested #ifs"); commented[iflevel]=commented[iflevel-1]; if (!commented[iflevel]) { char *s; if (nparam==2) p1end=p2end; /* we really want it all ! */ s=ArithmEval(p1start,p1end); commented[iflevel]=((s[0]=='0')&&(s[1]==0)); free(s); } break; case 14: /* MODE */ replace_directive_with_blank_line(C->out->f); if (nparam==1) p2start=-1; if (!commented[iflevel]) ProcessModeCommand(p1start,p1end,p2start,p2end); PopSpecs(); break; case 15: { /* LINE */ char buf[MAX_GPP_NUM_SIZE]; sprintf(buf, "%d", C->lineno); replace_directive_with_blank_line(C->out->f); sendout(buf, strlen(buf), 0); } break; case 16: /* FILE */ replace_directive_with_blank_line(C->out->f); sendout(C->filename, strlen(C->filename), 0); break; case 17: /* ELIF */ replace_directive_with_blank_line(C->out->f); if (iflevel==0) bug("#elif without #if"); if (!commented[iflevel-1]) { if (commented[iflevel]!=1) commented[iflevel]=2; else { char *s; commented[iflevel]=0; if (nparam==2) p1end=p2end; /* we really want it all ! */ s=ArithmEval(p1start,p1end); commented[iflevel]=((s[0]=='0')&&(s[1]==0)); free(s); } } break; case 18: /* ERROR */ replace_directive_with_blank_line(C->out->f); if (!commented[iflevel]) bug(ProcessText(C->buf + p1start, (nparam == 2 ? p2end : p1end) - p1start, FLAG_META)); break; case 19: /* WARNING */ replace_directive_with_blank_line(C->out->f); if (!commented[iflevel]) { char *s; s=ProcessText(C->buf + p1start, (nparam == 2 ? p2end : p1end) - p1start, FLAG_META); warning(s); free(s); } break; case 20: { /* DATE */ char buf[MAX_GPP_DATE_SIZE]; char *fmt; time_t now = time(NULL); fmt=ProcessText(C->buf + p1start, (nparam == 2 ? p2end : p1end) - p1start, FLAG_META); if (!strftime(buf, MAX_GPP_DATE_SIZE, fmt, localtime(&now))) bug("date buffer exceeded"); replace_directive_with_blank_line(C->out->f); sendout(buf, strlen(buf), 0); free(fmt); } break; default: bug("Internal meta-macro identification error"); } shiftIn(macend); return 0; } int ParsePossibleUser(void) { int idstart,idend,sh_end,lg_end,macend; int argc,id,i,l; char *argv[MAXARGS]; int argb[MAXARGS],arge[MAXARGS]; struct INPUTCONTEXT *T; idstart=1; id=0; if (!SplicePossibleUser(&idstart,&idend,&sh_end,&lg_end, argb,arge,&argc,1,&id,FLAG_USER)) return -1; if ((sh_end>=0)&&(C->namedargs!=NULL)) { i=findNamedArg(C->buf+idstart,idend-idstart); if (i>=0) { if (iargc) sendout(C->argv[i],strlen(C->argv[i]),0); shiftIn(sh_end); return 0; } } if (id<0) return -1; if (lg_end>=0) macend=lg_end; else { macend=sh_end; argc=0; } if (macros[id].nnamedargs==-2) { /* defined(...) macro for arithmetic */ char *s,*t; if (argc!=1) return -1; s=remove_comments(argb[0],arge[0],FLAG_USER); t=s+strlen(s)-1; if (*s!=0) while ((t!=s)&&iswhite(*t)) *(t--)=0; t=s; while (iswhite(*t)) t++; if (findIdent(t,strlen(t))>=0) outchar('1'); else outchar('0'); free(s); shiftIn(macend); return 0; } if (!macros[id].macrotext[0]) { /* the empty macro */ shiftIn(macend); return 0; } for (i=0;ibuf+argb[i],arge[i]-argb[i],FLAG_USER); /* process macro text */ T=C; C=malloc(sizeof *C); C->out=T->out; C->in=NULL; C->argc=argc; C->argv=argv; C->filename=T->filename; C->lineno=T->lineno; C->may_have_args=1; if ((macros[id].nnamedargs==-1)&&(lg_end>=0)&& (macros[id].define_specs->User.mEnd[0]==0)) { /* build an aliased macro call */ l=strlen(macros[id].macrotext)+2 +strlen(macros[id].define_specs->User.mArgS) +strlen(macros[id].define_specs->User.mArgE) +(argc-1)*strlen(macros[id].define_specs->User.mArgSep); for (i=0;ibuf=C->malloced_buf=malloc(l); l=strlen(macros[id].macrotext)+1; C->buf[0]='\n'; strcpy(C->buf+1,macros[id].macrotext); while ((l>1)&&iswhite(C->buf[l-1])) l--; strcpy(C->buf+l,macros[id].define_specs->User.mArgS); for (i=0;i0) strcat(C->buf,macros[id].define_specs->User.mArgSep); strcat(C->buf,argv[i]); } strcat(C->buf,macros[id].define_specs->User.mArgE); C->may_have_args=0; } else { C->buf=C->malloced_buf=malloc(strlen(macros[id].macrotext)+2); C->buf[0]='\n'; strcpy(C->buf+1,macros[id].macrotext); } C->len=strlen(C->buf); C->bufsize=C->len+1; C->eof=0; C->namedargs=macros[id].argnames; C->in_comment=macros[id].defined_in_comment; C->ambience=FLAG_META; PushSpecs(macros[id].define_specs); ProcessContext(); PopSpecs(); free(C); C=T; for (i=0;iin_comment) { cs=1; for (p=S->comments;p!=NULL;p=p->next) if (!(p->flags[C->ambience]&FLAG_IGNORE)) if (matchStartSequence(p->start,&cs)) { l=ce=findCommentEnd(p->end,p->quote,p->warn,cs,p->flags[C->ambience]); matchEndSequence(p->end,&l); if (p->flags[C->ambience]&OUTPUT_DELIM) sendout(C->buf+1,cs-1,0); if (!(p->flags[C->ambience]&OUTPUT_TEXT)) replace_definition_with_blank_lines(C->buf+1, C->buf+ce-1, 0); if (p->flags[C->ambience]&PARSE_MACROS) { C->in_comment=1; s=ProcessText(C->buf+cs,ce-cs,C->ambience); if (p->flags[C->ambience]&OUTPUT_TEXT) sendout(s,strlen(s),0); C->in_comment=0; free(s); } else if (p->flags[C->ambience]&OUTPUT_TEXT) sendout(C->buf+cs,ce-cs,0); if (p->flags[C->ambience]&OUTPUT_DELIM) sendout(C->buf+ce,l-ce,0); shiftIn(l); return; } } if (ParsePossibleMeta()>=0) return; if (ParsePossibleUser()>=0) return; l=1; /* If matching numbered macro argument and inside a macro */ if (matchSequence(S->User.mArgRef,&l) && C->may_have_args) { /* Process macro arguments referenced as #1,#2,... */ c=getChar(l); if ((c>='1')&&(c<='9')) { c=c-'1'; if (cargc) sendout(C->argv[(int)c],strlen(C->argv[(int)c]),0); shiftIn(l+1); return; } } l=identifierEnd(1); if (l==1) l=2; sendout(C->buf+1,l-1,1); shiftIn(l); } void ProcessContext(void) { if (C->len==0) { C->buf[0]='\n'; C->len++; } while (!C->eof) ParseText(); if (C->in!=NULL) fclose(C->in); free(C->malloced_buf); } /* additions by M. Kifer - revised D.A. 12/16/01 */ /* copy SLASH-terminated name of the directory of fname */ static void getDirname(const char *fname, char *dirname) { int i; for (i = strlen(fname)-1; i>=0; i--) { if (fname[i] == SLASH) break; } if (i >= 0) { strncpy(dirname,fname,i); dirname[i] = SLASH; } else /* just a precaution: i must be -1 in this case anyway */ i = -1; dirname[i+1] = '\0'; } static FILE *openInCurrentDir(const char *incfile) { char *absfile = calloc(strlen(C->filename)+strlen(incfile)+1, 1); FILE *f; getDirname(C->filename,absfile); strcat(absfile,incfile); f=fopen(absfile,"r"); free(absfile); return f; } /* skip = # of \n's already output by other mechanisms, to be skipped */ void replace_definition_with_blank_lines(const char *start, const char *end, int skip) { if ((include_directive_marker != NULL) && (C->out->f != NULL)) { while (start <= end) { if (*start == '\n') { if (skip) skip--; else fprintf(C->out->f,"\n"); } start++; } } } /* insert blank line where the metas IFDEF,ELSE,INCLUDE, etc., stood in the input text */ void replace_directive_with_blank_line(FILE *f) { if ((include_directive_marker != NULL) && (f != NULL) && (!S->preservelf) && (S->Meta.mArgE[0]=='\n')) { fprintf(f,"\n"); } } /* If lineno is > 15 digits - the number won't be printed correctly */ void write_include_marker(FILE *f, int lineno, char *filename, const char *marker) { static char lineno_buf[MAX_GPP_NUM_SIZE]; static char *escapedfilename = NULL; if ((include_directive_marker != NULL) && (f != NULL)) { #ifdef WIN_NT escape_backslashes(filename,&escapedfilename); #else escapedfilename = filename; #endif sprintf(lineno_buf,"%d", lineno); fprintf(f, include_directive_marker, lineno_buf, escapedfilename, marker); } } /* Under windows, files can have backslashes in them. These should be escaped. */ void escape_backslashes(const char *instr, char **outstr) { int out_idx=0; if (*outstr != NULL) free(*outstr); *outstr = malloc(2*strlen(instr)); while (*instr != '\0') { if (*instr=='\\') { *(*outstr+out_idx) = '\\'; out_idx++; } *(*outstr+out_idx) = *instr; out_idx++; instr++; } *(*outstr+out_idx) = '\0'; } /* includemarker_input should have 3 ?-marks, which are replaced with %s. Also, @ is replaced with a space. These symbols can be escaped with a backslash. */ void construct_include_directive_marker(char **include_directive_marker, const char *includemarker_input) { int len = strlen(includemarker_input); char ch; int in_idx=0, out_idx=0; int quoted = 0, num_repl = 0; /* only 6 extra chars are needed: 3 for the three %'s, 2 for \n, 1 for \0 */ *include_directive_marker = malloc(len+18); ch = *includemarker_input; while (ch != '\0' && in_idx < len) { if (quoted) { *(*include_directive_marker+out_idx) = ch; out_idx++; quoted = 0; } else { switch (ch) { case '\\': quoted = 1; break; case '@': *(*include_directive_marker+out_idx) = ' '; out_idx++; break; case '%': case '?': *(*include_directive_marker+out_idx) = '%'; out_idx++; *(*include_directive_marker+out_idx) = 's'; out_idx++; if (++num_repl > 3) bug("only 3 substitutions allowed in -includemarker"); break; default: *(*include_directive_marker+out_idx) = ch; out_idx++; } } in_idx++; ch = *(includemarker_input+in_idx); } *(*include_directive_marker+out_idx) = '\n'; out_idx++; *(*include_directive_marker+out_idx) = '\0'; } int main(int argc,char **argv) { initthings(argc,argv); /* The include marker at the top of the file */ if (IncludeFile) DoInclude(IncludeFile); write_include_marker(C->out->f, 1, C->filename, ""); ProcessContext(); fclose(C->out->f); return EXIT_SUCCESS; } gpp-2.24/src/Makefile.am0000644000076400001440000000101210074263630010526 # $Id: Makefile.am,v 1.3 2004/07/11 16:15:20 psy Exp $ # # Copyright (C) 2003 Tristan Miller # # This file is free software; the author gives unlimited permission to # copy and/or distribute it, with or without modifications. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY, to the extent permitted by law; without even # the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR # PURPOSE. bin_PROGRAMS = gpp gpp_SOURCES = gpp.c gpp-2.24/src/Makefile.in0000644000076400001440000003050410123366315010546 # Makefile.in generated by automake 1.9.1 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004 Free Software Foundation, Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. @SET_MAKE@ # $Id: Makefile.am,v 1.3 2004/07/11 16:15:20 psy Exp $ # # Copyright (C) 2003 Tristan Miller # # This file is free software; the author gives unlimited permission to # copy and/or distribute it, with or without modifications. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY, to the extent permitted by law; without even # the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR # PURPOSE. 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Please send GPP bug reports to Tristan Miller . Version 2.24 * Added a #date meta-macro allowing for formatting of dates and times Version 2.23 * Fixed a bug where #error and #warning directives were processed in the false branch of a conditional Version 2.22 * Added --include option which allows user to specify a file to be processed before the regular input file Version 2.21 * Added CPP-style #error and #warning meta-macros Version 2.20 * GPP's arithmetic evaluation macro (#eval) now supports file-globbing via =~ (POSIX only) * there is now an #elif macro to simplify conditional branching * fixed a bug where GPP would be off by one when reporting line numbers in its error messages or with the #line meta-macro Version 2.14 * fixed a crash bug * added built-in macros `line' and 'file' * GPP documentation is now under a free licence Version 2.13 * fixed bug which caused GPP to crash when the same macro was defined twice on the command line * GPP should compile on more systems now; non-standard C functions have been replaced with custom code * INSTALL contains installation instructions for Windows, Unix, and other systems. * GPP now issues a warning on use of deprecated command-line options * GPP is now packaged in a manner similar to most GNU programs, including a `configure' configuration/installation script suitable for Unix-like systems * credits moved from manual to AUTHORS and THANKS files * CHANGELOG superseded by files ChangeLog (detailed, for developers) and NEWS (brief, user-visible changes only) * added list of bugs and wishes as BUGS and TODO * minor changes (mostly typographical) to the manual Version 2.12 * New command-line options: - -X for XHTML mode - --help displays command-line option summary - --version displays version information - "long options" -nostdinc, -nocurinc, etc. changed to --nostdinc, --nocurinc, etc. * fixed miscellaneous typographical, grammatical, and spelling mistakes in documentation * licence changed from GNU Library GPL 2 to GNU Lesser GPL 2.1 * distribution now includes copy of the licence * new project maintainer: Tristan Miller Version 2.1 * Bugfixes: - bugfix in #defeval (can now be used to iteratively redefine a macro in terms of its previous definition) - bugfix in arithmetic evaluation (operator precedence between + and -, and between * and / was wrong) * Arithmetic evaluation: - length(...) builtin in #eval - all comparison operators revert to string comparison if arithmetic evaluation fails in #eval * Command-line options: - +n does the opposite of -n (do not preserve linefeeds; place *after* -C/-P) - -O sends output to file and stdout simultaneously - options to control directory search order for #include - option to adjust warning level - option to specify an include file marker to keep track of #include directives and line numbers in output * Misbehavior fixes: - numbered argument sequences (#1...#9) are disabled outside of definitions. - if a construct terminated by a newline is nested in last position within another construct, then the nested newline is optional. Concretely, this means that " #define myeval #eval #1 " is now valid. - macros defined on the command line with -D... can take named arguments. The syntax is: -Dmacro(arg1,...)=definition ; the definition should conform to the rules of the mode specified on the command-line, although the arguments are specified in C-style syntax (but without spaces !) - input line numbers are almost always preserved when -includemarker is specified * Miscellaneous: - LaTeX version of the manual in addition to man and html formats. ---------------------------------------------------------------------- Copyright information: Copyright (C) 2001 Denis Auroux. Copyright (C) 2003, 2004 Tristan Miller. Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and this permission notice are preserved, thus giving the recipient permission to redistribute in turn. Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last changed them. gpp-2.24/TODO0000644000076400001440000000037210123364704006402 TODO file for GPP. $Id: TODO,v 1.7 2004/09/19 20:19:16 psy Exp $ This file lists potential improvements and wish-list items for GPP. * integrate code from the 2.1a ("fast") branch * add #cmd_line_args macro * internationalize with GNU gettext gpp-2.24/depcomp0000755000076400001440000003554510110111562007265 #! /bin/sh # depcomp - compile a program generating dependencies as side-effects scriptversion=2004-05-31.23 # Copyright (C) 1999, 2000, 2003, 2004 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA # 02111-1307, USA. # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try \`$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by `PROGRAMS ARGS'. object Object file output by `PROGRAMS ARGS'. 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PACKAGE='gpp' VERSION='2.24' cat >>confdefs.h <<_ACEOF #define PACKAGE "$PACKAGE" _ACEOF cat >>confdefs.h <<_ACEOF #define VERSION "$VERSION" _ACEOF # Some tools Automake needs. ACLOCAL=${ACLOCAL-"${am_missing_run}aclocal-${am__api_version}"} AUTOCONF=${AUTOCONF-"${am_missing_run}autoconf"} AUTOMAKE=${AUTOMAKE-"${am_missing_run}automake-${am__api_version}"} AUTOHEADER=${AUTOHEADER-"${am_missing_run}autoheader"} MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"} install_sh=${install_sh-"$am_aux_dir/install-sh"} # Installed binaries are usually stripped using `strip' when the user # run `make install-strip'. However `strip' might not be the right # tool to use in cross-compilation environments, therefore Automake # will honor the `STRIP' environment variable to overrule this program. if test "$cross_compiling" != no; then if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args. set dummy ${ac_tool_prefix}strip; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_STRIP+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$STRIP"; then ac_cv_prog_STRIP="$STRIP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_STRIP="${ac_tool_prefix}strip" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi STRIP=$ac_cv_prog_STRIP if test -n "$STRIP"; then echo "$as_me:$LINENO: result: $STRIP" >&5 echo "${ECHO_T}$STRIP" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi fi if test -z "$ac_cv_prog_STRIP"; then ac_ct_STRIP=$STRIP # Extract the first word of "strip", so it can be a program name with args. set dummy strip; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_ac_ct_STRIP+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$ac_ct_STRIP"; then ac_cv_prog_ac_ct_STRIP="$ac_ct_STRIP" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_STRIP="strip" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done test -z "$ac_cv_prog_ac_ct_STRIP" && ac_cv_prog_ac_ct_STRIP=":" fi fi ac_ct_STRIP=$ac_cv_prog_ac_ct_STRIP if test -n "$ac_ct_STRIP"; then echo "$as_me:$LINENO: result: $ac_ct_STRIP" >&5 echo "${ECHO_T}$ac_ct_STRIP" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi STRIP=$ac_ct_STRIP else STRIP="$ac_cv_prog_STRIP" fi fi INSTALL_STRIP_PROGRAM="\${SHELL} \$(install_sh) -c -s" # We need awk for the "check" target. The system "awk" is bad on # some platforms. # Always define AMTAR for backward compatibility. AMTAR=${AMTAR-"${am_missing_run}tar"} am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -' ac_config_headers="$ac_config_headers config.h" # Checks for programs. ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args. set dummy ${ac_tool_prefix}gcc; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$CC"; then ac_cv_prog_CC="$CC" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_CC="${ac_tool_prefix}gcc" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi CC=$ac_cv_prog_CC if test -n "$CC"; then echo "$as_me:$LINENO: result: $CC" >&5 echo "${ECHO_T}$CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi fi if test -z "$ac_cv_prog_CC"; then ac_ct_CC=$CC # Extract the first word of "gcc", so it can be a program name with args. set dummy gcc; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_ac_ct_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$ac_ct_CC"; then ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_CC="gcc" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi ac_ct_CC=$ac_cv_prog_ac_ct_CC if test -n "$ac_ct_CC"; then echo "$as_me:$LINENO: result: $ac_ct_CC" >&5 echo "${ECHO_T}$ac_ct_CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi CC=$ac_ct_CC else CC="$ac_cv_prog_CC" fi if test -z "$CC"; then if test -n "$ac_tool_prefix"; then # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args. set dummy ${ac_tool_prefix}cc; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$CC"; then ac_cv_prog_CC="$CC" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_CC="${ac_tool_prefix}cc" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi CC=$ac_cv_prog_CC if test -n "$CC"; then echo "$as_me:$LINENO: result: $CC" >&5 echo "${ECHO_T}$CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi fi if test -z "$ac_cv_prog_CC"; then ac_ct_CC=$CC # Extract the first word of "cc", so it can be a program name with args. set dummy cc; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_ac_ct_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$ac_ct_CC"; then ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_CC="cc" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi ac_ct_CC=$ac_cv_prog_ac_ct_CC if test -n "$ac_ct_CC"; then echo "$as_me:$LINENO: result: $ac_ct_CC" >&5 echo "${ECHO_T}$ac_ct_CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi CC=$ac_ct_CC else CC="$ac_cv_prog_CC" fi fi if test -z "$CC"; then # Extract the first word of "cc", so it can be a program name with args. set dummy cc; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$CC"; then ac_cv_prog_CC="$CC" # Let the user override the test. else ac_prog_rejected=no as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then ac_prog_rejected=yes continue fi ac_cv_prog_CC="cc" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done if test $ac_prog_rejected = yes; then # We found a bogon in the path, so make sure we never use it. set dummy $ac_cv_prog_CC shift if test $# != 0; then # We chose a different compiler from the bogus one. # However, it has the same basename, so the bogon will be chosen # first if we set CC to just the basename; use the full file name. shift ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@" fi fi fi fi CC=$ac_cv_prog_CC if test -n "$CC"; then echo "$as_me:$LINENO: result: $CC" >&5 echo "${ECHO_T}$CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi fi if test -z "$CC"; then if test -n "$ac_tool_prefix"; then for ac_prog in cl do # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args. set dummy $ac_tool_prefix$ac_prog; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$CC"; then ac_cv_prog_CC="$CC" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_CC="$ac_tool_prefix$ac_prog" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi CC=$ac_cv_prog_CC if test -n "$CC"; then echo "$as_me:$LINENO: result: $CC" >&5 echo "${ECHO_T}$CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi test -n "$CC" && break done fi if test -z "$CC"; then ac_ct_CC=$CC for ac_prog in cl do # Extract the first word of "$ac_prog", so it can be a program name with args. set dummy $ac_prog; ac_word=$2 echo "$as_me:$LINENO: checking for $ac_word" >&5 echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6 if test "${ac_cv_prog_ac_ct_CC+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if test -n "$ac_ct_CC"; then ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test. else as_save_IFS=$IFS; IFS=$PATH_SEPARATOR for as_dir in $PATH do IFS=$as_save_IFS test -z "$as_dir" && as_dir=. for ac_exec_ext in '' $ac_executable_extensions; do if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then ac_cv_prog_ac_ct_CC="$ac_prog" echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5 break 2 fi done done fi fi ac_ct_CC=$ac_cv_prog_ac_ct_CC if test -n "$ac_ct_CC"; then echo "$as_me:$LINENO: result: $ac_ct_CC" >&5 echo "${ECHO_T}$ac_ct_CC" >&6 else echo "$as_me:$LINENO: result: no" >&5 echo "${ECHO_T}no" >&6 fi test -n "$ac_ct_CC" && break done CC=$ac_ct_CC fi fi test -z "$CC" && { { echo "$as_me:$LINENO: error: no acceptable C compiler found in \$PATH See \`config.log' for more details." >&5 echo "$as_me: error: no acceptable C compiler found in \$PATH See \`config.log' for more details." >&2;} { (exit 1); exit 1; }; } # Provide some information about the compiler. echo "$as_me:$LINENO:" \ "checking for C compiler version" >&5 ac_compiler=`set X $ac_compile; echo $2` { (eval echo "$as_me:$LINENO: \"$ac_compiler --version &5\"") >&5 (eval $ac_compiler --version &5) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } { (eval echo "$as_me:$LINENO: \"$ac_compiler -v &5\"") >&5 (eval $ac_compiler -v &5) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } { (eval echo "$as_me:$LINENO: \"$ac_compiler -V &5\"") >&5 (eval $ac_compiler -V &5) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ int main () { ; return 0; } _ACEOF ac_clean_files_save=$ac_clean_files ac_clean_files="$ac_clean_files a.out a.exe b.out" # Try to create an executable without -o first, disregard a.out. # It will help us diagnose broken compilers, and finding out an intuition # of exeext. echo "$as_me:$LINENO: checking for C compiler default output file name" >&5 echo $ECHO_N "checking for C compiler default output file name... $ECHO_C" >&6 ac_link_default=`echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'` if { (eval echo "$as_me:$LINENO: \"$ac_link_default\"") >&5 (eval $ac_link_default) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; then # Find the output, starting from the most likely. This scheme is # not robust to junk in `.', hence go to wildcards (a.*) only as a last # resort. # Be careful to initialize this variable, since it used to be cached. # Otherwise an old cache value of `no' led to `EXEEXT = no' in a Makefile. ac_cv_exeext= # b.out is created by i960 compilers. for ac_file in a_out.exe a.exe conftest.exe a.out conftest a.* conftest.* b.out do test -f "$ac_file" || continue case $ac_file in *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj ) ;; conftest.$ac_ext ) # This is the source file. ;; [ab].out ) # We found the default executable, but exeext='' is most # certainly right. break;; *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'` # FIXME: I believe we export ac_cv_exeext for Libtool, # but it would be cool to find out if it's true. Does anybody # maintain Libtool? --akim. export ac_cv_exeext break;; * ) break;; esac done else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 { { echo "$as_me:$LINENO: error: C compiler cannot create executables See \`config.log' for more details." >&5 echo "$as_me: error: C compiler cannot create executables See \`config.log' for more details." >&2;} { (exit 77); exit 77; }; } fi ac_exeext=$ac_cv_exeext echo "$as_me:$LINENO: result: $ac_file" >&5 echo "${ECHO_T}$ac_file" >&6 # Check the compiler produces executables we can run. 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Now check whether non-existent headers # can be detected and how. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null; then if test -s conftest.err; then ac_cpp_err=$ac_c_preproc_warn_flag ac_cpp_err=$ac_cpp_err$ac_c_werror_flag else ac_cpp_err= fi else ac_cpp_err=yes fi if test -z "$ac_cpp_err"; then # Broken: success on invalid input. continue else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 # Passes both tests. ac_preproc_ok=: break fi rm -f conftest.err conftest.$ac_ext done # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. rm -f conftest.err conftest.$ac_ext if $ac_preproc_ok; then break fi done ac_cv_prog_CPP=$CPP fi CPP=$ac_cv_prog_CPP else ac_cv_prog_CPP=$CPP fi echo "$as_me:$LINENO: result: $CPP" >&5 echo "${ECHO_T}$CPP" >&6 ac_preproc_ok=false for ac_c_preproc_warn_flag in '' yes do # Use a header file that comes with gcc, so configuring glibc # with a fresh cross-compiler works. # Prefer to if __STDC__ is defined, since # exists even on freestanding compilers. # On the NeXT, cc -E runs the code through the compiler's parser, # not just through cpp. "Syntax error" is here to catch this case. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #ifdef __STDC__ # include #else # include #endif Syntax error _ACEOF if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null; then if test -s conftest.err; then ac_cpp_err=$ac_c_preproc_warn_flag ac_cpp_err=$ac_cpp_err$ac_c_werror_flag else ac_cpp_err= fi else ac_cpp_err=yes fi if test -z "$ac_cpp_err"; then : else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 # Broken: fails on valid input. continue fi rm -f conftest.err conftest.$ac_ext # OK, works on sane cases. Now check whether non-existent headers # can be detected and how. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5 (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } >/dev/null; then if test -s conftest.err; then ac_cpp_err=$ac_c_preproc_warn_flag ac_cpp_err=$ac_cpp_err$ac_c_werror_flag else ac_cpp_err= fi else ac_cpp_err=yes fi if test -z "$ac_cpp_err"; then # Broken: success on invalid input. continue else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 # Passes both tests. ac_preproc_ok=: break fi rm -f conftest.err conftest.$ac_ext done # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped. rm -f conftest.err conftest.$ac_ext if $ac_preproc_ok; then : else { { echo "$as_me:$LINENO: error: C preprocessor \"$CPP\" fails sanity check See \`config.log' for more details." >&5 echo "$as_me: error: C preprocessor \"$CPP\" fails sanity check See \`config.log' for more details." >&2;} { (exit 1); exit 1; }; } fi ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' ac_compiler_gnu=$ac_cv_c_compiler_gnu echo "$as_me:$LINENO: checking for egrep" >&5 echo $ECHO_N "checking for egrep... $ECHO_C" >&6 if test "${ac_cv_prog_egrep+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else if echo a | (grep -E '(a|b)') >/dev/null 2>&1 then ac_cv_prog_egrep='grep -E' else ac_cv_prog_egrep='egrep' fi fi echo "$as_me:$LINENO: result: $ac_cv_prog_egrep" >&5 echo "${ECHO_T}$ac_cv_prog_egrep" >&6 EGREP=$ac_cv_prog_egrep echo "$as_me:$LINENO: checking for ANSI C header files" >&5 echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6 if test "${ac_cv_header_stdc+set}" = set; then echo $ECHO_N "(cached) $ECHO_C" >&6 else cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include #include #include #include int main () { ; return 0; } _ACEOF rm -f conftest.$ac_objext if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 (eval $ac_compile) 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; } && { ac_try='test -s conftest.$ac_objext' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; }; then ac_cv_header_stdc=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_cv_header_stdc=no fi rm -f conftest.err conftest.$ac_objext conftest.$ac_ext if test $ac_cv_header_stdc = yes; then # SunOS 4.x string.h does not declare mem*, contrary to ANSI. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "memchr" >/dev/null 2>&1; then : else ac_cv_header_stdc=no fi rm -f conftest* fi if test $ac_cv_header_stdc = yes; then # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI. cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include _ACEOF if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "free" >/dev/null 2>&1; then : else ac_cv_header_stdc=no fi rm -f conftest* fi if test $ac_cv_header_stdc = yes; then # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi. if test "$cross_compiling" = yes; then : else cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ #include #if ((' ' & 0x0FF) == 0x020) # define ISLOWER(c) ('a' <= (c) && (c) <= 'z') # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c)) #else # define ISLOWER(c) \ (('a' <= (c) && (c) <= 'i') \ || ('j' <= (c) && (c) <= 'r') \ || ('s' <= (c) && (c) <= 'z')) # define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c)) #endif #define XOR(e, f) (((e) && !(f)) || (!(e) && (f))) int main () { int i; for (i = 0; i < 256; i++) if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2); exit (0); } _ACEOF rm -f conftest$ac_exeext if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5 (eval $ac_link) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { ac_try='./conftest$ac_exeext' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; }; then : else echo "$as_me: program exited with status $ac_status" >&5 echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ( exit $ac_status ) ac_cv_header_stdc=no fi rm -f core *.core gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext fi fi fi echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5 echo "${ECHO_T}$ac_cv_header_stdc" >&6 if test $ac_cv_header_stdc = yes; then cat >>confdefs.h <<\_ACEOF #define STDC_HEADERS 1 _ACEOF fi # On IRIX 5.3, sys/types and inttypes.h are conflicting. for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \ inttypes.h stdint.h unistd.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 if eval "test \"\${$as_ac_Header+set}\" = set"; then echo $ECHO_N "(cached) $ECHO_C" >&6 else cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ $ac_includes_default #include <$ac_header> _ACEOF rm -f conftest.$ac_objext if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 (eval $ac_compile) 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; } && { ac_try='test -s conftest.$ac_objext' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; }; then eval "$as_ac_Header=yes" else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 eval "$as_ac_Header=no" fi rm -f conftest.err conftest.$ac_objext conftest.$ac_ext fi echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 if test `eval echo '${'$as_ac_Header'}'` = yes; then cat >>confdefs.h <<_ACEOF #define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 _ACEOF fi done for ac_header in stdlib.h string.h fnmatch.h do as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` if eval "test \"\${$as_ac_Header+set}\" = set"; then echo "$as_me:$LINENO: checking for $ac_header" >&5 echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 if eval "test \"\${$as_ac_Header+set}\" = set"; then echo $ECHO_N "(cached) $ECHO_C" >&6 fi echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 else # Is the header compilable? echo "$as_me:$LINENO: checking $ac_header usability" >&5 echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6 cat >conftest.$ac_ext <<_ACEOF /* confdefs.h. */ _ACEOF cat confdefs.h >>conftest.$ac_ext cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ $ac_includes_default #include <$ac_header> _ACEOF rm -f conftest.$ac_objext if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 (eval $ac_compile) 2>conftest.er1 ac_status=$? grep -v '^ *+' conftest.er1 >conftest.err rm -f conftest.er1 cat conftest.err >&5 echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); } && { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; } && { ac_try='test -s conftest.$ac_objext' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; }; then ac_header_compiler=yes else echo "$as_me: failed program was:" >&5 sed 's/^/| /' conftest.$ac_ext >&5 ac_header_compiler=no fi rm -f conftest.err conftest.$ac_objext conftest.$ac_ext echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 echo "${ECHO_T}$ac_header_compiler" >&6 # Is the header present? 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Generated from configure.ac by autoheader. */ /* Define to 1 if you have the header file. */ #undef HAVE_FNMATCH_H /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the `strcasecmp' function. */ #undef HAVE_STRCASECMP /* Define to 1 if you have the `strchr' function. */ #undef HAVE_STRCHR /* Define to 1 if you have the `strdup' function. */ #undef HAVE_STRDUP /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Define to 1 if you have the `strtol' function. */ #undef HAVE_STRTOL /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Version number of package */ #undef VERSION /* Define to empty if `const' does not conform to ANSI C. */ #undef const /* Define to `__inline__' or `__inline' if that's what the C compiler calls it, or to nothing if 'inline' is not supported under any name. */ #ifndef __cplusplus #undef inline #endif /* Define to `unsigned' if does not define. */ #undef size_t gpp-2.24/AUTHORS0000644000076400001440000000024507774354654007006 Authors of GPP. GPP was written by Denis Auroux . Since version 2.12 it has been maintained by Tristan Miller . gpp-2.24/INSTALL0000644000076400001440000002301110013430050006720 Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. Copyright (C) 2003, 2004 Tristan Miller. This file is free documentation; the Free Software Foundation gives unlimited permission to copy, distribute and modify it. Basic Installation ================== NON-UNIX SYSTEMS, INCLUDING MS-WINDOWS: You will need a C compiler. Copy the file config.in.h to src/config.h. Open the file and follow the instructions inside to modify it based on your system's capabilities. Then compile the gpp.c file in the `src' subdirectory with the macro HAVE_CONFIG_H #defined. On MS-Windows systems you may need to also #define the macro WIN_NT if your compiler does not already #define it by default. UNIX-LIKE SYSTEMS: These are generic installation instructions. The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. It may also create one or more `.h' files containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, and a file `config.log' containing compiler output (useful mainly for debugging `configure'). It can also use an optional file (typically called `config.cache' and enabled with `--cache-file=config.cache' or simply `-C') that saves the results of its tests to speed up reconfiguring. (Caching is disabled by default to prevent problems with accidental use of stale cache files.) If you need to do unusual things to compile the package, please try to figure out how `configure' could check whether to do them, and mail diffs or instructions to the address given in the `README' so they can be considered for the next release. If you are using the cache, and at some point `config.cache' contains results you don't want to keep, you may remove or edit it. The file `configure.ac' (or `configure.in') is used to create `configure' by a program called `autoconf'. You only need `configure.ac' if you want to change it or regenerate `configure' using a newer version of `autoconf'. The simplest way to compile this package is: 1. `cd' to the directory containing the package's source code and type `./configure' to configure the package for your system. If you're using `csh' on an old version of System V, you might need to type `sh ./configure' instead to prevent `csh' from trying to execute `configure' itself. Running `configure' takes awhile. While running, it prints some messages telling which features it is checking for. 2. Type `make' to compile the package. 3. Optionally, type `make check' to run any self-tests that come with the package. 4. Type `make install' to install the programs and any data files and documentation. 5. You can remove the program binaries and object files from the source code directory by typing `make clean'. To also remove the files that `configure' created (so you can compile the package for a different kind of computer), type `make distclean'. There is also a `make maintainer-clean' target, but that is intended mainly for the package's developers. If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution. Compilers and Options ===================== Some systems require unusual options for compilation or linking that the `configure' script does not know about. Run `./configure --help' for details on some of the pertinent environment variables. You can give `configure' initial values for configuration parameters by setting variables in the command line or in the environment. Here is an example: ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix *Note Defining Variables::, for more details. Compiling For Multiple Architectures ==================================== You can compile the package for more than one kind of computer at the same time, by placing the object files for each architecture in their own directory. To do this, you must use a version of `make' that supports the `VPATH' variable, such as GNU `make'. `cd' to the directory where you want the object files and executables to go and run the `configure' script. `configure' automatically checks for the source code in the directory that `configure' is in and in `..'. If you have to use a `make' that does not support the `VPATH' variable, you have to compile the package for one architecture at a time in the source code directory. After you have installed the package for one architecture, use `make distclean' before reconfiguring for another architecture. Installation Names ================== By default, `make install' will install the package's files in `/usr/local/bin', `/usr/local/man', etc. You can specify an installation prefix other than `/usr/local' by giving `configure' the option `--prefix=PATH'. You can specify separate installation prefixes for architecture-specific files and architecture-independent files. If you give `configure' the option `--exec-prefix=PATH', the package will use PATH as the prefix for installing programs and libraries. Documentation and other data files will still use the regular prefix. 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Defining Variables ================== Variables not defined in a site shell script can be set in the environment passed to `configure'. However, some packages may run configure again during the build, and the customized values of these variables may be lost. In order to avoid this problem, you should set them in the `configure' command line, using `VAR=value'. For example: ./configure CC=/usr/local2/bin/gcc will cause the specified gcc to be used as the C compiler (unless it is overridden in the site shell script). `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of the options to `configure', and exit. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. To suppress all normal output, redirect it to `/dev/null' (any error messages will still be shown). `--srcdir=DIR' Look for the package's source code in directory DIR. Usually `configure' can determine that directory automatically. `configure' also accepts some other, not widely useful, options. Run `configure --help' for more details. gpp-2.24/ChangeLog0000644000076400001440000001056210123364710007463 2004-09-19 Tristan Miller * NEWS, TODO, configure.ac, doc/gpp.pp, src/gpp.c: Added #date meta-macro 2004-07-11 Tristan Miller * configure.ac: Upgrade version number * THANKS: *** empty log message *** * NEWS: Downgraded version number * BUGS: Bug report from Richard M. Myers * TODO: More wishlist items from users * configure.ac, src/Makefile.am, src/gettext.h, src/gpp.c, autogen.mak, Makefile.am: Roll back changes to 2004-07-05 * Makefile.am, NEWS, THANKS, autogen.mak, configure.ac, src/Makefile.am, src/gettext.h, src/gpp.c: Added gettext patch from Lucas Wall 2004-07-05 Tristan Miller * src/gpp.c: Fixed bug where #error/#warning inside an #if block was always executed (even in the false branch) 2004-06-22 Tristan Miller * THANKS: Debian package 2004-02-14 Tristan Miller * NEWS, README, THANKS, TODO, configure.ac, doc/gpp.pp, src/gpp.c, BUGS, INSTALL: Added --include option 2004-02-07 Tristan Miller * TODO: Misc updates * INSTALL: Updated copyright notice. * INSTALL: Simplified installation instructions into Unix and non-Unix varieties. * doc/gpp.pp: Documentation for #error and #warning * NEWS: Changes for 2.21 * src/gpp.c: Added #error and #warning meta-macros * configure.ac: Bump version number 2004-01-17 Tristan Miller * NEWS: Describes new features in 2.20 * src/gpp.c: Adding globbing and elif support * doc/gpp.pp: Added documentation for globbing and elif * configure.ac: Now checks for fnmatch.h * THANKS: *** empty log message *** * src/gpp.c: Fixed line number bug * configure.ac: *** empty log message *** * configure.ac: Removed MALLOC/REALLOC checks (we never malloc(0) anyway AFAIK) 2004-01-16 Tristan Miller * THANKS, TODO, configure.ac, doc/gpp.pp, src/gpp.c, NEWS: Fixed crash bug, added #line and #file macros, updated licence for documentation * TODO: *** empty log message *** 2003-12-31 Tristan Miller * Makefile.am: Added BUGS, TODO to distribution * NEWS, README, THANKS, TODO, configure.ac, doc/gpp.pp, gpp.c, gpphelp.pp, src/Makefile.am, src/gpp.c, AUTHORS, BUGS, CHANGELOG, COPYING, INSTALL, LICENCE, Makefile, Makefile.am: Autoconfiscated plus various bugfixes and updates; see NEWS for details 2003-11-22 Tristan Miller * CHANGELOG, gpp.c: Changed licence * gpphelp.pp: *** empty log message *** * README: Initial import * Makefile, CHANGELOG: *** empty log message *** * CHANGELOG: Added CVS Id string * CHANGELOG: Licence * gpphelp.pp: Changed copyright notices * gpp.c: Added to to-do list * gpp.c: Changed copyright notices * Makefile: Added CVS Id string * CHANGELOG: *** empty log message *** * gpphelp.pp: Added documentation for long options * gpp.c: Added long option variants * gpphelp.pp: Documentation for -h, --help, --version * gpp.c: Added -help, -version arguments * CHANGELOG: *** empty log message *** * gpphelp.pp: Fixed grammar, spelling, typography, typos 2003-11-21 Tristan Miller * gpphelp.pp: Changed copyright notices * gpp.c: *** empty log message *** * gpp.c: Updated version number * gpp.c: *** empty log message *** * gpp.c: Added const qualifiers where appropriate (may not have caught them all, though) * gpp.c: Removed casting to calloc() calls, sizeof(char) * gpp.c: Removed casting to realloc() calls * gpp.c: Removed casting in memcpy() * gpp.c: Many instances of () -> (void) * gpp.c: ProcessContext() -> ProcessContext(void) * gpp.c: Removed malloc() casting 2003-10-04 Tristan Miller * LICENCE: LGPL * LICENCE: Wrong licence; should be LGPL * LICENCE: Adding GNU licence * gpphelp.pp: Added nothingisreal.com home page * gpp.c: Misc authorship changes and C code niceties * gpphelp.pp: Fixed bugs in author attribution * gpphelp.pp: Deleted space before /> in example * CHANGELOG, Makefile, gpp.1, gpp.c, gpp.html, gpphelp.pp: Initial release of 2.11 * CHANGELOG, Makefile, gpp.1, gpp.c, gpp.html, gpphelp.pp: Initial import into CVS * CHANGELOG, Makefile, gpp.1, gpp.c, gpp.html, gpphelp.pp: New file. gpp-2.24/COPYING0000644000076400001440000006347607737605773007010 GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 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