editline-0.2.1.1/0000755000000000000000000000000012054624557011646 5ustar0000000000000000editline-0.2.1.1/aclocal.m40000644000000000000000000000261512054624557013512 0ustar0000000000000000# FP_ARG_EDITLINE # ------------- AC_DEFUN([FP_ARG_EDITLINE], [ AC_ARG_WITH([editline-includes], [AC_HELP_STRING([--with-editline-includes], [directory containing editline/editline.h])], [editline_includes=$withval], [editline_includes=NONE]) AC_ARG_WITH([editline-libraries], [AC_HELP_STRING([--with-editline-libraries], [directory containing editline library])], [editline_libraries=$withval], [editline_libraries=NONE]) ])# FP_ARG_EDITLINE AC_DEFUN([CHECK_HIST_ERRORS], [ dnl Older versions of libedit (up to at least 2.6.9) don't handle errors in dnl functions like read_history the same way that readline does; whereas dnl readline returns a positive errno on error and zero otherwise, dnl editline may return -1 on error and a nonnegative value otherwise. 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So we exec the FD to /dev/null, # effectively closing config.log, so it can be properly (re)opened and # appended to by config.status. When coming back to configure, we # need to make the FD available again. if test "$no_create" != yes; then ac_cs_success=: ac_config_status_args= test "$silent" = yes && ac_config_status_args="$ac_config_status_args --quiet" exec 5>/dev/null $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false exec 5>>config.log # Use ||, not &&, to avoid exiting from the if with $? = 1, which # would make configure fail if this is the last instruction. $ac_cs_success || as_fn_exit 1 fi if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized options: $ac_unrecognized_opts" >&5 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;} fi editline-0.2.1.1/configure.ac0000644000000000000000000000425612054624557014143 0ustar0000000000000000AC_INIT([Haskell editline package], [1.0], [libraries@haskell.org], [editline]) AC_CONFIG_HEADERS([include/HsEditlineConfig.h]) FP_ARG_EDITLINE EDITLINE_INCLUDE_DIRS= EDITLINE_LIB_DIRS= if test "x$editline_libraries" != "xNONE"; then LDFLAGS="-L$editline_libraries $LDFLAGS" EDITLINE_LDFLAGS="-L$editline_libraries $EDITLINE_LDFLAGS" EDITLINE_LIB_DIRS=$editline_libraries fi if test "x$editline_includes" != "xNONE"; then CPPFLAGS="-I$editline_includes $CPPFLAGS" EDITLINE_CFLAGS="-I$editline_includes $EDITLINE_CFLAGS" EDITLINE_INCLUDE_DIRS=$editline_includes fi AC_SUBST(EDITLINE_INCLUDE_DIRS) AC_SUBST(EDITLINE_LIB_DIRS) AC_ARG_WITH([cc], [C compiler], [CC=$withval]) AC_PROG_CC() dnl ncurses supersedes termcap and curses, but for compatibility, dnl we have to check for all... dnl Check for curses before ncurses since that's how editline's configure script dnl does it. AC_CHECK_LIB(curses, tgetent, HaveLibTermcap=YES; LibTermcap=curses, [AC_CHECK_LIB(ncurses, tgetent, HaveLibTermcap=YES; LibTermcap=ncurses, [AC_CHECK_LIB(termcap, tgetent, HaveLibTermcap=YES; LibTermcap=termcap, HaveLibTermcap=NO; LibTermcap=not-installed)])]) if test "x$HaveLibTermcap" = xYES ; then HaveLibEdit=YES LIBS="$LIBS -l$LibTermcap -ledit" AC_CHECK_FUNC(el_init, , HaveLibEdit=NO) AC_CHECK_FUNC(readline, , HaveLibEdit=NO) EDITLINE_LIBS="edit $LibTermcap" else HaveLibEdit=NO fi dnl Look for the equivalent of dnl Make sure to check last, so that if both readline and dnl editline are installed, we'll pick the right one. AC_CHECK_HEADERS([editline/readline.h editline/editline.h readline/readline.h], [break]) CHECK_HIST_ERRORS AC_CHECK_FUNCS([rl_completion_matches completion_matches], HaveCompletionMatches=YES) if test "x$HaveCompletionMatches" != xYES ; then HaveLibEdit=NO fi if test "x$HaveLibEdit" = xYES ; then BUILD_PACKAGE_BOOL=True else BUILD_PACKAGE_BOOL=False AC_MSG_FAILURE([editline not found, so this package cannot be built]) fi AC_SUBST([BUILD_PACKAGE_BOOL]) AC_SUBST([EDITLINE_CFLAGS]) AC_SUBST([EDITLINE_LDFLAGS]) AC_SUBST([EDITLINE_LIBS]) AC_CONFIG_FILES([editline.buildinfo]) AC_OUTPUT editline-0.2.1.1/editline.buildinfo.in0000644000000000000000000000017612054624557015751 0ustar0000000000000000buildable: @BUILD_PACKAGE_BOOL@ cc-options: @EDITLINE_CFLAGS@ ld-options: @EDITLINE_LDFLAGS@ extra-libraries: @EDITLINE_LIBS@ editline-0.2.1.1/editline.cabal0000644000000000000000000000243712054624557014435 0ustar0000000000000000name: editline version: 0.2.1.1 license: BSD3 license-file: LICENSE maintainer: Judah Jacobson category: User Interfaces synopsis: Bindings to the editline library (libedit). description: This package contains bindings to the BSD editline library (). It provides a basic interface to the editline API for reading lines of input from the user. . Additionally, a readline compatibility module is included which provides a subset of the functions from the readline package. homepage: http://code.haskell.org/editline extra-source-files: aclocal.m4 configure.ac editline.buildinfo.in configure include/HsEditlineConfig.h.in extra-tmp-files: config.log config.status autom4te.cache editline.buildinfo include/HsEditlineConfig.h build-type: Configure cabal-version: >=1.2 library build-depends: base < 4.7 exposed-modules: System.Console.Editline System.Console.Editline.Readline extensions: ForeignFunctionInterface, EmptyDataDecls include-dirs: include includes: HsEditline.h install-includes: HsEditline.h HsEditlineConfig.h c-sources: cbits/HsEditline.c editline-0.2.1.1/LICENSE0000644000000000000000000000315712054624557012661 0ustar0000000000000000Copyright (c) 2008, Judah Jacobson (c) 2007, Isaac Jones (c) 2002, Simon Marlow (c) 2001, Marcin Kowalczyk All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the names of the copyright holders nor the names of other contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. editline-0.2.1.1/Setup.lhs0000644000000000000000000000017512054624557013461 0ustar0000000000000000#!/usr/local/bin/runhaskell \begin{code} import Distribution.Simple main = defaultMainWithHooks defaultUserHooks \end{code} editline-0.2.1.1/cbits/0000755000000000000000000000000012054624557012752 5ustar0000000000000000editline-0.2.1.1/cbits/HsEditline.c0000644000000000000000000000062512054624557015151 0ustar0000000000000000#include "HsEditline.h" EditLine *el_init_from_term(const char *prog) { return el_init(prog, stdin, stdout, stderr); } int el_set_prompt(EditLine *e,char *(*f)(EditLine *)) { return el_set(e, EL_PROMPT, f); } int el_set_editor(EditLine *e, const char *mode) { return el_set(e, EL_EDITOR, mode); } int el_get_one_arg(EditLine *e, int op, void *result) { return el_get(e, op, result); } editline-0.2.1.1/include/0000755000000000000000000000000012054624557013271 5ustar0000000000000000editline-0.2.1.1/include/HsEditline.h0000644000000000000000000000063612054624557015477 0ustar0000000000000000#ifndef HSEDITLINE_H #define HSEDITLINE_H #include "HsEditlineConfig.h" #include #include extern EditLine *el_init_from_term(const char *prog); /* explicit instances of el_set,el_get functions */ extern int el_set_prompt(EditLine *e,char *(*f)(EditLine *)); extern int el_set_editor(EditLine *e, const char *mode); extern int el_get_one_arg(EditLine *e, int op, void *result); #endif editline-0.2.1.1/include/HsEditlineConfig.h0000644000000000000000000000425212054624557016623 0ustar0000000000000000/* include/HsEditlineConfig.h. Generated from HsEditlineConfig.h.in by configure. */ /* include/HsEditlineConfig.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the `completion_matches' function. */ #define HAVE_COMPLETION_MATCHES 1 /* Define to 1 if you have the header file. */ /* #undef HAVE_EDITLINE_EDITLINE_H */ /* Define to 1 if you have the header file. */ #define HAVE_EDITLINE_READLINE_H 1 /* Define to 1 if you have the header file. */ #define HAVE_INTTYPES_H 1 /* Define to 1 if you have the header file. */ #define HAVE_MEMORY_H 1 /* Define to 1 if you have the header file. */ /* #undef HAVE_READLINE_READLINE_H */ /* Define to 1 if you have the `rl_completion_matches' function. */ #define HAVE_RL_COMPLETION_MATCHES 1 /* Define to 1 if you have the header file. */ #define HAVE_STDINT_H 1 /* Define to 1 if you have the header file. */ #define HAVE_STDLIB_H 1 /* Define to 1 if you have the header file. */ #define HAVE_STRINGS_H 1 /* Define to 1 if you have the header file. */ #define HAVE_STRING_H 1 /* Define to 1 if you have the header file. */ #define HAVE_SYS_STAT_H 1 /* Define to 1 if you have the header file. */ #define HAVE_SYS_TYPES_H 1 /* Define to 1 if you have the header file. */ #define HAVE_UNISTD_H 1 /* Define if read_history returns a positive value on error */ /* #undef NEGATIVE_HIST_ERROR */ /* Define to the address where bug reports for this package should be sent. */ #define PACKAGE_BUGREPORT "libraries@haskell.org" /* Define to the full name of this package. */ #define PACKAGE_NAME "Haskell editline package" /* Define to the full name and version of this package. */ #define PACKAGE_STRING "Haskell editline package 1.0" /* Define to the one symbol short name of this package. */ #define PACKAGE_TARNAME "editline" /* Define to the home page for this package. */ #define PACKAGE_URL "" /* Define to the version of this package. */ #define PACKAGE_VERSION "1.0" /* Define to 1 if you have the ANSI C header files. */ #define STDC_HEADERS 1 editline-0.2.1.1/include/HsEditlineConfig.h.in0000644000000000000000000000365612054624557017237 0ustar0000000000000000/* include/HsEditlineConfig.h.in. Generated from configure.ac by autoheader. */ /* Define to 1 if you have the `completion_matches' function. */ #undef HAVE_COMPLETION_MATCHES /* Define to 1 if you have the header file. */ #undef HAVE_EDITLINE_EDITLINE_H /* Define to 1 if you have the header file. */ #undef HAVE_EDITLINE_READLINE_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_READLINE_READLINE_H /* Define to 1 if you have the `rl_completion_matches' function. */ #undef HAVE_RL_COMPLETION_MATCHES /* 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 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 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 /* Define if read_history returns a positive value on error */ #undef NEGATIVE_HIST_ERROR /* 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 home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS editline-0.2.1.1/System/0000755000000000000000000000000012054624557013132 5ustar0000000000000000editline-0.2.1.1/System/Console/0000755000000000000000000000000012054624557014534 5ustar0000000000000000editline-0.2.1.1/System/Console/Editline.hsc0000644000000000000000000000751412054624557016777 0ustar0000000000000000----------------------------------------------------------------------------- -- | -- Module : System.Console.Editline -- Copyright : (c) 2008, Judah Jacobson -- License : BSD3 -- -- Maintainer : judah.jacobson@gmail.com -- Stability : experimental -- Portability : non-portable (requires libedit) -- -- A Haskell binding to the editline library. For more information about that -- library, see . -- -- The following example illustrates using this library to write a loop that will -- process input until it reaches EOF or a Ctrl-D is typed. -- -- @ --editlineLoop :: IO () -- editlineLoop = do -- prog <- System.Environment.getProgName -- el <- elInit prog -- setPrompt el (return \"input: \") -- setEditor el Vi -- let loop = do -- maybeLine <- elGets el -- case maybeLine of -- Nothing -> return () -- ctrl-D -- Just line -> do -- let line\' = init line -- remove trailing \'\\n\' -- putStrLn $ \"User input: \" ++ show line\' -- loop -- loop -- @ -- module System.Console.Editline( EditLine(), elInit, reset, elGets, setPrompt, Editor(..), setEditor ) where import Foreign.C import Foreign.ForeignPtr import Foreign.Ptr import Foreign.Marshal import Foreign.Storable (peek) import Control.Monad #include "HsEditline.h" data EDITLINE newtype EditLine = EditLine (ForeignPtr EDITLINE) withEditLine :: EditLine -> (Ptr EDITLINE -> IO a) -> IO a withEditLine (EditLine fp) = withForeignPtr fp -- | Initialize the line editor. elInit :: String -- ^ The name of the calling program; used when reading the -- @editrc@ file to determine which settings to use. -> IO EditLine elInit prog = do el <- withCString prog el_init_from_term fmap EditLine $ newForeignPtr el_end el foreign import ccall el_init_from_term :: CString -> IO (Ptr EDITLINE) foreign import ccall "&" el_end :: FunPtr (Ptr EDITLINE -> IO ()) -- | Reset the terminal and the parser. This should be called after an error which -- may have upset the terminal's state. reset :: EditLine -> IO () reset el = withEditLine el el_reset foreign import ccall el_reset :: Ptr EDITLINE -> IO () -- | Read a line of input from the terminal. Returns Nothing if no characters -- were read or if an error occured. elGets :: EditLine -> IO (Maybe String) elGets el = withEditLine el $ \el_p -> alloca $ \count_p -> do result <- el_gets el_p count_p count <- fmap fromEnum $ peek count_p if result == nullPtr then return Nothing else fmap Just $ peekCStringLen (result, count) foreign import ccall el_gets :: Ptr EDITLINE -> Ptr CInt -> IO CString foreign import ccall el_set_prompt :: Ptr EDITLINE -> FunPtr PromptFunc -> IO CInt -- | Set a function that will determine the prompt string. setPrompt :: EditLine -> IO String -> IO () setPrompt el f = withEditLine el $ \el_p -> do -- Set new function f_ptr <- mkPromptFunc $ \_ -> f >>= newCString el_set_prompt el_p f_ptr return () type PromptFunc = Ptr EDITLINE -> IO CString foreign import ccall "wrapper" mkPromptFunc :: PromptFunc -> IO (FunPtr PromptFunc) data Editor = Vi | Emacs editorString :: Editor -> String editorString Vi = "vi" editorString Emacs = "emacs" -- | Set the editor keymap mode. setEditor :: EditLine -> Editor -> IO () setEditor el editor = withEditLine el $ \el_p -> withCString (editorString editor) $ \ed_str -> el_set_editor el_p ed_str >> return () foreign import ccall el_set_editor :: Ptr EDITLINE -> CString -> IO CInt editline-0.2.1.1/System/Console/Editline/0000755000000000000000000000000012054624557016271 5ustar0000000000000000editline-0.2.1.1/System/Console/Editline/Readline.hsc0000644000000000000000000006306612054624557020526 0ustar0000000000000000----------------------------------------------------------------------------- -- | -- Module : System.Console.Editline.Readline -- Copyright : (c) 2008, Judah Jacobson -- Copied with permission from the readline package -- (originally System.Console.Readline): -- (c) 2007, Isaac Jones -- (c) 2002, Simon Marlow -- (c) 2001, Marcin Kowalczyk -- License : BSD3 -- -- Maintainer : judah.jacobson@gmail.com -- Stability : provisional -- Portability : non-portable (requires libedit) -- -- This module provides a subset of the functions from -- "System.Console.Readline", which is distributed in the readline package. -- However, because this package links against editline -- () instead of readline, programs using -- this module are not required to be distributed under the GPL. -- -- An example of a typical use of the readline API with history functionality -- is illustrated in the following read, eval, print loop: -- -- @ -- readEvalPrintLoop :: IO () -- readEvalPrintLoop = do -- maybeLine <- readline \"% \" -- case maybeLine of -- Nothing -> return () -- EOF \/ control-d -- Just \"exit\" -> return () -- Just line -> do addHistory line -- putStrLn $ \"The user input: \" ++ (show line) -- readEvalPrintLoop -- @ -- ----------------------------------------------------------------------------- #include "HsEditlineConfig.h" #ifdef HAVE_EDITLINE_READLINE_H #include #else #ifdef HAVE_READLINE_READLINE_H #include #else #ifdef HAVE_EDITLINE_EDITLINE_H #include #endif #endif #endif module System.Console.Editline.Readline ( -------------------------------------------------------------------- -- Basic Behavior. readline, -- :: String -> IO (Maybe String) -------------------------------------------------------------------- -- History Functionality. addHistory, -- :: String -> IO () readHistory, -- :: String -> IO Bool writeHistory, -- :: String -> IO Bool clearHistory, -- :: IO () stifleHistory, -- :: Int -> IO () unstifleHistory, -- :: IO Int historyIsStifled, -- :: IO Bool historyMaxEntries, -- IO Int -------------------------------------------------------------------- -- Readline Variables. getLineBuffer, -- :: IO String -- Functions involving point positions are meaningful only when string -- conversion between Haskell and C preserves the length. getPoint, -- :: IO Int setPoint, -- :: Int -> IO () getEnd, -- :: IO Int setEnd, -- :: Int -> IO () getPrompt, -- :: IO String getLibraryVersion, -- :: IO String getTerminalName, -- :: IO String setReadlineName, -- :: String -> IO () getInStream, -- :: IO Handle getOutStream, -- :: IO Handle setStartupHook, -- :: Maybe (IO ()) -> IO () -- rl_getc_function wrapper is not provided because it uses FILE * -- and it would be too expensive to convert FILE * to Handle -- for each character. setRedisplayFunction, -- :: Maybe (IO ()) -> IO () -- Nothing means the original: rl_redisplay. -------------------------------------------------------------------- -- Binding Keys. Callback, -- type Callback = Int -> Char -> IO Int addDefun, -- :: String -> Callback -> Maybe Char -> IO () bindKey, -- :: Char -> Callback -> IO () parseAndBind, -- :: String -> IO () readInitFile, -- :: String -> IO () -------------------------------------------------------------------- -- Redisplay. redisplay, -- :: IO () -------------------------------------------------------------------- -- Utility functions. readKey, -- :: IO Char stuffChar, -- :: Char -> IO Bool initialize, -- :: IO () resetTerminal, -- :: Maybe String -> IO () -------------------------------------------------------------------- -- Alternate Interface. callbackHandlerInstall, -- :: String -> (String -> IO ()) -> IO (IO ()) -- Returns the cleanup action. callbackReadChar, -- :: IO () -------------------------------------------------------------------- -- Completion functions. complete, -- :: Int -> Char -> IO Int -- readline uses functions that are called multiple times and -- return an entry at a time, maintaining their state at which -- point they are. This is silly in a functional language so here -- we work with functions String -> IO [String]. completionMatches, -- :: String -> (String -> IO [String]) -> IO (Maybe (String, [String])) filenameCompletionFunction, -- :: String -> IO [String] usernameCompletionFunction, -- :: String -> IO [String] setCompletionEntryFunction, -- :: Maybe (String -> IO [String]) -> IO () setAttemptedCompletionFunction, -- :: Maybe (String -> Int -> Int -> IO (Maybe (String, [String]))) -> IO () getCompletionQueryItems, -- :: IO Int setCompletionQueryItems, -- :: Int -> IO () getBasicWordBreakCharacters, -- :: IO String setBasicWordBreakCharacters, -- :: String -> IO () getCompleterWordBreakCharacters, -- :: IO String setCompleterWordBreakCharacters, -- :: String -> IO () getCompleterQuoteCharacters, -- :: IO String setCompleterQuoteCharacters, -- :: String -> IO () getSpecialPrefixes, -- :: IO String setSpecialPrefixes, -- :: String -> IO () getCompletionAppendCharacter, -- :: IO (Maybe Char) setCompletionAppendCharacter, -- :: Maybe Char -> IO () setInhibitCompletion, -- :: Bool -> IO () getInhibitCompletion, -- :: IO Bool setAttemptedCompletionOver, -- :: Bool -> IO () getAttemptedCompletionOver, -- :: IO Bool ) where ------------------------------------------------------------------------ import Control.Monad ( liftM, when, unless ) import Data.Char ( chr, ord ) import System.IO ( Handle ) import System.IO.Unsafe ( unsafePerformIO ) import Data.IORef ( newIORef, readIORef, writeIORef ) import Foreign.Ptr ( Ptr, nullPtr, FunPtr, nullFunPtr, freeHaskellFunPtr ) import Foreign.Storable ( Storable(..) ) import Foreign.Marshal.Utils ( maybePeek, maybeWith ) import Foreign.Marshal.Alloc ( free ) import Foreign.Marshal.Array ( mallocArray, peekArray0, pokeArray0 ) import Foreign.C.Types ( CInt(..), CChar, CFile ) import Foreign.C.String ( newCString, peekCString, withCString, castCharToCChar, castCCharToChar ) import GHC.Handle ( fdToHandle ) {-# CFILES HsReadline_cbits.c #-} ------------------------------------------------------------------------ -- Basic Behavior. -- | readline is similar to 'System.IO.getLine', but with rich edit -- functionality and history capability. readline will read a line -- from the terminal and return it, using /prompt/ as a prompt. If -- prompt is the empty string, no prompt is issued. The line returned -- has the final newline removed, so only the text of the line -- remains. A blank line returns the empty string. If EOF is -- encountered while reading a line, and the line is empty, Nothing is -- returned. If an EOF is read with a non-empty line, it is treated -- as a newline. readline :: String-- ^prompt -> IO (Maybe String) -- ^returns the line the user input, or Nothing if EOF is encountered. readline prompt = do ptr <- withCString prompt readlineC flip maybePeek ptr $ \ptr' -> do line <- peekCString ptr' free ptr' return line foreign import ccall "readline" readlineC :: Ptr CChar -> IO (Ptr CChar) -------------------------------------------------------------------------- -- History functionality -- TODO: older versions of libedit don't return errors correctly... -- |Add this command to the history. This allows users to search backward -- through history with C-r and step through with up and down arrows, among -- other things. addHistory :: String -> IO () addHistory line = withCString line add_history foreign import ccall unsafe add_history :: Ptr CChar -> IO () -- |Read in a history file. Returns 'False' on failure -- (for example, if the file does not exist). readHistory :: FilePath -- ^ The file to read. -> IO Bool readHistory fp = do ok <- withCString fp read_history return (histResultIsOK ok) foreign import ccall unsafe read_history :: Ptr CChar -> IO CInt -- |Write out a history file. Returns 'False' if there was a problem writing the file. writeHistory :: FilePath -- ^ The file to write. -> IO Bool writeHistory fp = do ok <- withCString fp write_history return (histResultIsOK ok) foreign import ccall unsafe write_history :: Ptr CChar -> IO CInt histResultIsOK :: CInt -> Bool #ifdef NEGATIVE_HIST_ERROR -- Old way that libedit handled errors; different from readline histResultIsOK = (>=0) #else histResultIsOK = (==0) #endif -- |Clear the history. clearHistory :: IO () clearHistory = clear_history foreign import ccall unsafe clear_history :: IO () -- |Stifle the history list, remembering only a certain number of entries. stifleHistory :: Int -> IO () stifleHistory n = stifle_history n foreign import ccall unsafe stifle_history :: Int -> IO () -- |Stop stifling the history, returning the previous amount the history was -- stifled by. unstifleHistory :: IO Int unstifleHistory = unstifle_history foreign import ccall unsafe unstifle_history :: IO Int -- |Check whether the history is stifled or not. True if stifled, False if not. historyIsStifled :: IO Bool historyIsStifled = do isStifledInt <- history_is_stifled let isStifled = case isStifledInt of 0 -> False 1 -> True _ -> error "historyIsStifled: history_is_stifled returned unexpected value (expected 0 or 1, received other)" -- just for completeness - there is no conceivable way readline would not return either 0 or 1 here return isStifled foreign import ccall unsafe history_is_stifled :: IO Int -- |Get the maximum number of history entries, returning 0 if the history is -- unstifled. historyMaxEntries :: IO Int historyMaxEntries = liftM fromIntegral (peek max_input_history) -- Note: this variable is different than history_max_entries, but has the same -- use. foreign import ccall "&" max_input_history :: Ptr CInt ------------------------------------------------------------------------ -- Readline Variables. getLineBuffer :: IO String getLineBuffer = peek rl_line_buffer >>= peekCString foreign import ccall "&" rl_line_buffer :: Ptr (Ptr CChar) -- Functions involving point positions are meaningful only when string -- conversion between Haskell and C preserves the length. getPoint :: IO Int getPoint = liftM fromIntegral (peek rl_point) setPoint :: Int -> IO () setPoint p = poke rl_point (fromIntegral p) foreign import ccall "&" rl_point :: Ptr CInt getEnd :: IO Int getEnd = liftM fromIntegral (peek rl_end) setEnd :: Int -> IO () setEnd p = poke rl_end (fromIntegral p) foreign import ccall "&" rl_end :: Ptr CInt getPrompt :: IO String getPrompt = peek rl_prompt >>= peekCString foreign import ccall "&" rl_prompt :: Ptr (Ptr CChar) getLibraryVersion :: IO String getLibraryVersion = peek rl_library_version >>= peekCString foreign import ccall "&" rl_library_version :: Ptr (Ptr CChar) getTerminalName :: IO String getTerminalName = peek rl_terminal_name >>= peekCString foreign import ccall "&" rl_terminal_name :: Ptr (Ptr CChar) setReadlineName :: String -> IO () setReadlineName name = newCString name >>= poke rl_readline_name -- The memory for name will never be freed. Otherwise we would -- have to recognize the original value which is a static string -- literal. This function is usually called only once anyway. foreign import ccall "&" rl_readline_name :: Ptr (Ptr CChar) getInStream :: IO Handle getInStream = peek rl_instream >>= hs_fileno >>= fdToHandle . fromIntegral foreign import ccall "&" rl_instream :: Ptr (Ptr CFile) getOutStream :: IO Handle getOutStream = peek rl_outstream >>= hs_fileno >>= fdToHandle . fromIntegral foreign import ccall "&" rl_outstream :: Ptr (Ptr CFile) foreign import ccall unsafe "fileno" hs_fileno :: Ptr CFile -> IO CInt setStartupHook :: Maybe (IO ()) -> IO () setStartupHook hook = setFunPtr rl_startup_hook hook exportHookInt foreign import ccall "&" rl_startup_hook :: Ptr (FunPtr (IO CInt)) -- rl_getc_function wrapper is not provided because it uses FILE * -- and it would be too expensive to convert FILE * to Handle -- for each character. setRedisplayFunction :: Maybe (IO ()) -> IO () -- Nothing means the original: rl_redisplay. setRedisplayFunction fun = do oldPtr <- peek rl_redisplay_function when (oldPtr /= nullFunPtr && oldPtr /= rl_redisplay) $ freeHaskellFunPtr oldPtr newPtr <- case fun of Nothing -> return rl_redisplay Just f -> exportHookVoid f poke rl_redisplay_function newPtr foreign import ccall "&" rl_redisplay_function :: Ptr (FunPtr (IO ())) foreign import ccall "&" rl_redisplay :: FunPtr (IO ()) -- rl_redisplay_function can never be NULL. exportHookInt :: IO () -> IO (FunPtr (IO CInt)) exportHookInt hook = exportHookIntC (hook >> return 0) foreign import ccall "wrapper" exportHookIntC :: IO CInt -> IO (FunPtr (IO CInt)) foreign import ccall "wrapper" exportHookVoid :: IO () -> IO (FunPtr (IO ())) setFunPtr_freeIf :: (FunPtr a -> Bool) -> Ptr (FunPtr a) -> Maybe b -> (b -> IO (FunPtr a)) -> IO () setFunPtr_freeIf predicate variable newFun makeNewFun = do oldPtr <- peek variable when (predicate oldPtr) $ freeHaskellFunPtr oldPtr newPtr <- case newFun of Nothing -> return nullFunPtr Just f -> makeNewFun f poke variable newPtr setFunPtr :: Ptr (FunPtr a) -> Maybe b -> (b -> IO (FunPtr a)) -> IO () setFunPtr = setFunPtr_freeIf (/= nullFunPtr) ------------------------------------------------------------------------ -- Binding Keys. type Callback = Int -> Char -> IO Int type CallbackC = CInt -> CInt -> IO CInt addDefun :: String -> Callback -> Maybe Char -> IO () addDefun name cb key = do namePtr <- newCString name -- rl_add_defun does *not* make a copy of the function name. cbPtr <- exportCallback cb -- The memory will never be freed. But readline does not provide -- removing defuns anyway. rl_add_defun namePtr cbPtr (maybe (-1) (fromIntegral . ord) key) return () foreign import ccall unsafe "rl_add_defun" rl_add_defun :: Ptr CChar -> FunPtr CallbackC -> CInt -> IO CInt bindKey :: Char -> Callback -> IO () bindKey key cb = do cbPtr <- exportCallback cb -- The memory will never be freed. We should provide a way to -- free it, but it's complicated because of multiple keymaps. -- It should probably be done explicitly. rl_bind_key (fromIntegral (ord key)) cbPtr return () foreign import ccall unsafe "rl_bind_key" rl_bind_key :: CInt -> FunPtr CallbackC -> IO CInt parseAndBind :: String -> IO () parseAndBind s = do ok <- withCString s rl_parse_and_bind unless (ok == 0) $ ioError (userError "Parse error") foreign import ccall unsafe "rl_parse_and_bind" rl_parse_and_bind :: Ptr CChar -> IO CInt readInitFile :: String -> IO () readInitFile name = do ok <- withCString name rl_read_init_file unless (ok == 0) $ ioError (userError "Can't read file") foreign import ccall unsafe "rl_read_init_file" rl_read_init_file :: Ptr CChar -> IO CInt ------------------------------------------------------------------------ -- Associating Function Names and Bindings. exportCallback :: Callback -> IO (FunPtr CallbackC) exportCallback cb = exportCallbackC $ \n key -> liftM fromIntegral (cb (fromIntegral n) (chr (fromIntegral key))) foreign import ccall "wrapper" exportCallbackC :: CallbackC -> IO (FunPtr CallbackC) ------------------------------------------------------------------------ -- Redisplay. foreign import ccall unsafe "rl_redisplay" redisplay :: IO () ------------------------------------------------------------------------ -- Utility functions. readKey :: IO Char readKey = liftM (chr . fromIntegral) rl_read_key foreign import ccall unsafe "rl_read_key" rl_read_key :: IO CInt stuffChar :: Char -> IO Bool stuffChar key = liftM (/= 0) (rl_stuff_char (fromIntegral (ord key))) foreign import ccall unsafe "rl_stuff_char" rl_stuff_char :: CInt -> IO CInt initialize :: IO () initialize = do rl_initialize; return () foreign import ccall unsafe "rl_initialize" rl_initialize :: IO CInt resetTerminal :: Maybe String -> IO () resetTerminal name = do maybeWith withCString name rl_reset_terminal return () foreign import ccall unsafe "rl_reset_terminal" rl_reset_terminal :: Ptr CChar -> IO CInt ------------------------------------------------------------------------ -- Alternate Interface. type Handler = Ptr CChar -> IO () callbackHandlerInstall :: String -> (String -> IO ()) -> IO (IO ()) callbackHandlerInstall prompt lhandler = do lhandlerPtr <- exportHandler $ \linePtr -> peekCString linePtr >>= lhandler withCString prompt $ \promptPtr -> do rl_callback_handler_install promptPtr lhandlerPtr return (do rl_callback_handler_remove; freeHaskellFunPtr lhandlerPtr) foreign import ccall "wrapper" exportHandler :: Handler -> IO (FunPtr Handler) foreign import ccall unsafe "rl_callback_handler_install" rl_callback_handler_install :: Ptr CChar -> FunPtr Handler -> IO () foreign import ccall unsafe "rl_callback_handler_remove" rl_callback_handler_remove :: IO () foreign import ccall "rl_callback_read_char" callbackReadChar :: IO () ------------------------------------------------------------------------ -- Completion functions. complete :: Int -> Char -> IO Int complete n key = liftM fromIntegral $ rl_complete (fromIntegral n) (fromIntegral (ord key)) foreign import ccall "rl_complete" rl_complete :: CInt -> CInt -> IO CInt type Generator = Ptr CChar -> CInt -> IO (Ptr CChar) singleToWhole :: Generator -> String -> IO [String] singleToWhole f text = withCString text $ \textPtr -> let loop n = do ptr <- f textPtr n if ptr == nullPtr then return [] else do str <- peekCString ptr free ptr rest <- loop (n+1) return (str:rest) in loop 0 wholeToSingle :: (String -> IO [String]) -> IO Generator wholeToSingle f = do ref <- newIORef [] return $ \textPtr state -> do when (state == 0) $ peekCString textPtr >>= f >>= writeIORef ref next <- readIORef ref case next of [] -> return nullPtr x:xs -> do writeIORef ref xs newCString x completionMatches :: String -> (String -> IO [String]) -> IO (Maybe (String, [String])) completionMatches text entry = withCString text $ \textPtr -> do entryPtr <- wholeToSingle entry >>= exportGenerator matchesPtr <- rl_completion_matches textPtr entryPtr freeHaskellFunPtr entryPtr if matchesPtr == nullPtr then return Nothing else do matchPtrs <- peekArray0 nullPtr matchesPtr (text':matches) <- mapM peekCString matchPtrs mapM_ free matchPtrs free matchesPtr return (Just (text', matches)) #ifdef HAVE_RL_COMPLETION_MATCHES foreign import ccall "rl_completion_matches" #else foreign import ccall "completion_matches" #endif rl_completion_matches :: Ptr CChar -> FunPtr Generator -> IO (Ptr (Ptr CChar)) filenameCompletionFunction :: String -> IO [String] filenameCompletionFunction = singleToWhole rl_filename_completion_function foreign import ccall unsafe "filename_completion_function" rl_filename_completion_function :: Generator usernameCompletionFunction :: String -> IO [String] usernameCompletionFunction = singleToWhole rl_username_completion_function foreign import ccall unsafe "username_completion_function" rl_username_completion_function :: Generator setCompletionEntryFunction :: Maybe (String -> IO [String]) -> IO () setCompletionEntryFunction fun = setFunPtr rl_completion_entry_function fun $ \f -> wholeToSingle f >>= exportGenerator foreign import ccall "&" rl_completion_entry_function :: Ptr (FunPtr Generator) foreign import ccall "wrapper" exportGenerator :: Generator -> IO (FunPtr Generator) type Completer = Ptr CChar -> CInt -> CInt -> IO (Ptr (Ptr CChar)) setAttemptedCompletionFunction :: Maybe (String -> Int -> Int -> IO (Maybe (String, [String]))) -> IO () setAttemptedCompletionFunction fun = setFunPtr rl_attempted_completion_function fun $ \f -> exportCompleter $ \textPtr start end -> do text <- peekCString textPtr found <- f text (fromIntegral start) (fromIntegral end) case found of Nothing -> return nullPtr Just (text', matches) -> do let matches' = if null matches then [text'] else matches matchPtrs <- mapM newCString (text':matches') matchesPtr <- mallocArray (length matchPtrs + 1) pokeArray0 nullPtr matchesPtr matchPtrs return matchesPtr foreign import ccall "&" rl_attempted_completion_function :: Ptr (FunPtr Completer) foreign import ccall "wrapper" exportCompleter :: Completer -> IO (FunPtr Completer) getCompletionQueryItems :: IO Int getCompletionQueryItems = liftM fromIntegral (peek rl_completion_query_items) setCompletionQueryItems :: Int -> IO () setCompletionQueryItems items = poke rl_completion_query_items (fromIntegral items) foreign import ccall "&" rl_completion_query_items :: Ptr CInt getBasicWordBreakCharacters :: IO String getBasicWordBreakCharacters = getCharacters rl_basic_word_break_characters setBasicWordBreakCharacters :: String -> IO () setBasicWordBreakCharacters = setCharacters_freeIf (/= orig_rl_basic_word_break_characters) rl_basic_word_break_characters foreign import ccall "&" rl_basic_word_break_characters :: Ptr (Ptr CChar) -- Similarly to rl_quote_filename, we must be able to detect the -- original pointer to a static char array. {-# NOINLINE orig_rl_basic_word_break_characters #-} orig_rl_basic_word_break_characters :: Ptr CChar orig_rl_basic_word_break_characters = unsafePerformIO $ peek rl_basic_word_break_characters getCompleterWordBreakCharacters :: IO String getCompleterWordBreakCharacters = getCharacters rl_completer_word_break_characters setCompleterWordBreakCharacters :: String -> IO () setCompleterWordBreakCharacters = setCharacters_freeIf (\oldPtr -> oldPtr /= nullPtr && oldPtr /= orig_rl_basic_word_break_characters) rl_completer_word_break_characters foreign import ccall "&" rl_completer_word_break_characters :: Ptr (Ptr CChar) getCompleterQuoteCharacters :: IO String getCompleterQuoteCharacters = getCharacters rl_completer_quote_characters setCompleterQuoteCharacters :: String -> IO () setCompleterQuoteCharacters cs = do oldPtr <- peek rl_completer_quote_characters when (oldPtr /= nullPtr) $ free oldPtr -- I think that rl_completer_quote_characters should never be empty -- but can be NULL. newPtr <- if null cs then return nullPtr else do ptr <- mallocArray (length cs + 1) pokeArray0 0 ptr (map castCharToCChar cs) return ptr poke rl_completer_quote_characters newPtr foreign import ccall "&" rl_completer_quote_characters :: Ptr (Ptr CChar) getSpecialPrefixes :: IO String getSpecialPrefixes = getCharacters rl_special_prefixes setSpecialPrefixes :: String -> IO () setSpecialPrefixes = setCharacters rl_special_prefixes foreign import ccall "&" rl_special_prefixes :: Ptr (Ptr CChar) getCompletionAppendCharacter :: IO (Maybe Char) getCompletionAppendCharacter = do ch <- peek rl_completion_append_character return $ if ch == 0 then Nothing else Just (chr (fromIntegral ch)) setCompletionAppendCharacter :: Maybe Char -> IO () setCompletionAppendCharacter ch = poke rl_completion_append_character (maybe 0 (fromIntegral . ord) ch) foreign import ccall "&" rl_completion_append_character :: Ptr CInt setInhibitCompletion :: Bool -> IO () setInhibitCompletion inh = poke rl_inhibit_completion (if inh then 1 else 0) getInhibitCompletion :: IO Bool getInhibitCompletion = liftM (/= 0) (peek rl_inhibit_completion) foreign import ccall "&" rl_attempted_completion_over :: Ptr CInt getAttemptedCompletionOver :: IO Bool getAttemptedCompletionOver = liftM (/=0) (peek rl_attempted_completion_over) setAttemptedCompletionOver :: Bool -> IO () setAttemptedCompletionOver over = poke rl_attempted_completion_over (if over then 1 else 0) foreign import ccall "&" rl_inhibit_completion :: Ptr CInt setCharacters_freeIf :: (Ptr CChar -> Bool) -> Ptr (Ptr CChar) -> String -> IO () setCharacters_freeIf predicate variable chars = do oldPtr <- peek variable when (predicate oldPtr) $ free oldPtr newPtr <- mallocArray (length chars + 1) pokeArray0 0 newPtr (map castCharToCChar chars) poke variable newPtr setCharacters :: Ptr (Ptr CChar) -> String -> IO () setCharacters = setCharacters_freeIf (/= nullPtr) getCharacters :: Ptr (Ptr CChar) -> IO String getCharacters variable = do ptr <- peek variable if ptr == nullPtr then return "" else do cs <- peekArray0 0 ptr return (map castCCharToChar cs)