hxt-unicode-9.0.2.4/0000755000000000000000000000000012465156120012303 5ustar0000000000000000hxt-unicode-9.0.2.4/hxt-unicode.cabal0000644000000000000000000000251212465156120015516 0ustar0000000000000000Name: hxt-unicode Version: 9.0.2.4 Synopsis: Unicode en-/decoding functions for utf8, iso-latin-* and other encodings Description: Unicode encoding and decoding functions for utf8, iso-latin-* and somes other encodings, used in the Haskell XML Toolbox. ISO Latin 1 - 16, utf8, utf16, ASCII are supported. Decoding is done with lazy functions, errors may be detected or ignored. Homepage: http://www.fh-wedel.de/~si/HXmlToolbox/index.html License: MIT License-file: LICENSE Author: Uwe Schmidt Maintainer: Uwe Schmidt Homepage: https://github.com/UweSchmidt/hxt Copyright: Copyright (c) 2010- Uwe Schmidt Stability: Stable Category: Text Build-type: Simple Cabal-version: >=1.6 Library Exposed-modules: Data.Char.IsoLatinTables Data.String.EncodingNames Data.String.UTF8 Data.String.UTF8Decoding Data.String.Unicode Build-depends: base >= 4 && < 5 , hxt-charproperties >= 9 && < 10 hs-source-dirs: src ghc-options: -Wall ghc-prof-options: -caf-all Source-Repository head Type: git Location: git://github.com/UweSchmidt/hxt.git hxt-unicode-9.0.2.4/LICENSE0000644000000000000000000000212012465156120013303 0ustar0000000000000000The MIT License Copyright (c) 2005 Uwe Schmidt, Martin Schmidt, Torben Kuseler Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. hxt-unicode-9.0.2.4/Setup.hs0000644000000000000000000000011012465156120013727 0ustar0000000000000000#!/usr/bin/env runhaskell import Distribution.Simple main = defaultMain hxt-unicode-9.0.2.4/src/0000755000000000000000000000000012465156120013072 5ustar0000000000000000hxt-unicode-9.0.2.4/src/Data/0000755000000000000000000000000012465156120013743 5ustar0000000000000000hxt-unicode-9.0.2.4/src/Data/Char/0000755000000000000000000000000012465156120014620 5ustar0000000000000000hxt-unicode-9.0.2.4/src/Data/Char/IsoLatinTables.hs0000644000000000000000000004351712465156120020043 0ustar0000000000000000module Data.Char.IsoLatinTables where iso_8859_2 :: [(Char, Char)] iso_8859_2 = [ ('\161', '\260' ) , ('\162', '\728' ) , ('\163', '\321' ) , ('\165', '\317' ) , ('\166', '\346' ) , ('\169', '\352' ) , ('\170', '\350' ) , ('\171', '\356' ) , ('\172', '\377' ) , ('\174', '\381' ) , ('\175', '\379' ) , ('\177', '\261' ) , ('\178', '\731' ) , ('\179', '\322' ) , ('\181', '\318' ) , ('\182', '\347' ) , ('\183', '\711' ) , ('\185', '\353' ) , ('\186', '\351' ) , ('\187', '\357' ) , ('\188', '\378' ) , ('\189', '\733' ) , ('\190', '\382' ) , ('\191', '\380' ) , ('\192', '\340' ) , ('\195', '\258' ) , ('\197', '\313' ) , ('\198', '\262' ) , ('\200', '\268' ) , ('\202', '\280' ) , ('\204', '\282' ) , ('\207', '\270' ) , ('\208', '\272' ) , ('\209', '\323' ) , ('\210', '\327' ) , ('\213', '\336' ) , ('\216', '\344' ) , ('\217', '\366' ) , ('\219', '\368' ) , ('\222', '\354' ) , ('\224', '\341' ) , ('\227', '\259' ) , ('\229', '\314' ) , ('\230', '\263' ) , ('\232', '\269' ) , ('\234', '\281' ) , ('\236', '\283' ) , ('\239', '\271' ) , ('\240', '\273' ) , ('\241', '\324' ) , ('\242', '\328' ) , ('\245', '\337' ) , ('\248', '\345' ) , ('\249', '\367' ) , ('\251', '\369' ) , ('\254', '\355' ) , ('\255', '\729' ) ] iso_8859_3 :: [(Char, Char)] iso_8859_3 = [ ('\161', '\294' ) , ('\162', '\728' ) , ('\166', '\292' ) , ('\169', '\304' ) , ('\170', '\350' ) , ('\171', '\286' ) , ('\172', '\308' ) , ('\175', '\379' ) , ('\177', '\295' ) , ('\182', '\293' ) , ('\185', '\305' ) , ('\186', '\351' ) , ('\187', '\287' ) , ('\188', '\309' ) , ('\191', '\380' ) , ('\197', '\266' ) , ('\198', '\264' ) , ('\213', '\288' ) , ('\216', '\284' ) , ('\221', '\364' ) , ('\222', '\348' ) , ('\229', '\267' ) , ('\230', '\265' ) , ('\245', '\289' ) , ('\248', '\285' ) , ('\253', '\365' ) , ('\254', '\349' ) , ('\255', '\729' ) ] iso_8859_4 :: [(Char, Char)] iso_8859_4 = [ ('\161', '\260' ) , ('\162', '\312' ) , ('\163', '\342' ) , ('\165', '\296' ) , ('\166', '\315' ) , ('\169', '\352' ) , ('\170', '\274' ) , ('\171', '\290' ) , ('\172', '\358' ) , ('\174', '\381' ) , ('\177', '\261' ) , ('\178', '\731' ) , ('\179', '\343' ) , ('\181', '\297' ) , ('\182', '\316' ) , ('\183', '\711' ) , ('\185', '\353' ) , ('\186', '\275' ) , ('\187', '\291' ) , ('\188', '\359' ) , ('\189', '\330' ) , ('\190', '\382' ) , ('\191', '\331' ) , ('\192', '\256' ) , ('\199', '\302' ) , ('\200', '\268' ) , ('\202', '\280' ) , ('\204', '\278' ) , ('\207', '\298' ) , ('\208', '\272' ) , ('\209', '\325' ) , ('\210', '\332' ) , ('\211', '\310' ) , ('\217', '\370' ) , ('\221', '\360' ) , ('\222', '\362' ) , ('\224', '\257' ) , ('\231', '\303' ) , ('\232', '\269' ) , ('\234', '\281' ) , ('\236', '\279' ) , ('\239', '\299' ) , ('\240', '\273' ) , ('\241', '\326' ) , ('\242', '\333' ) , ('\243', '\311' ) , ('\249', '\371' ) , ('\253', '\361' ) , ('\254', '\363' ) , ('\255', '\729' ) ] iso_8859_5 :: [(Char, Char)] iso_8859_5 = [ ('\161', '\1025' ) , ('\162', '\1026' ) , ('\163', '\1027' ) , ('\164', '\1028' ) , ('\165', '\1029' ) , ('\166', '\1030' ) , ('\167', '\1031' ) , ('\168', '\1032' ) , ('\169', '\1033' ) , ('\170', '\1034' ) , ('\171', '\1035' ) , ('\172', '\1036' ) , ('\174', '\1038' ) , ('\175', '\1039' ) , ('\176', '\1040' ) , ('\177', '\1041' ) , ('\178', '\1042' ) , ('\179', '\1043' ) , ('\180', '\1044' ) , ('\181', '\1045' ) , ('\182', '\1046' ) , ('\183', '\1047' ) , ('\184', '\1048' ) , ('\185', '\1049' ) , ('\186', '\1050' ) , ('\187', '\1051' ) , ('\188', '\1052' ) , ('\189', '\1053' ) , ('\190', '\1054' ) , ('\191', '\1055' ) , ('\192', '\1056' ) , ('\193', '\1057' ) , ('\194', '\1058' ) , ('\195', '\1059' ) , ('\196', '\1060' ) , ('\197', '\1061' ) , ('\198', '\1062' ) , ('\199', '\1063' ) , ('\200', '\1064' ) , ('\201', '\1065' ) , ('\202', '\1066' ) , ('\203', '\1067' ) , ('\204', '\1068' ) , ('\205', '\1069' ) , ('\206', '\1070' ) , ('\207', '\1071' ) , ('\208', '\1072' ) , ('\209', '\1073' ) , ('\210', '\1074' ) , ('\211', '\1075' ) , ('\212', '\1076' ) , ('\213', '\1077' ) , ('\214', '\1078' ) , ('\215', '\1079' ) , ('\216', '\1080' ) , ('\217', '\1081' ) , ('\218', '\1082' ) , ('\219', '\1083' ) , ('\220', '\1084' ) , ('\221', '\1085' ) , ('\222', '\1086' ) , ('\223', '\1087' ) , ('\224', '\1088' ) , ('\225', '\1089' ) , ('\226', '\1090' ) , ('\227', '\1091' ) , ('\228', '\1092' ) , ('\229', '\1093' ) , ('\230', '\1094' ) , ('\231', '\1095' ) , ('\232', '\1096' ) , ('\233', '\1097' ) , ('\234', '\1098' ) , ('\235', '\1099' ) , ('\236', '\1100' ) , ('\237', '\1101' ) , ('\238', '\1102' ) , ('\239', '\1103' ) , ('\240', '\8470' ) , ('\241', '\1105' ) , ('\242', '\1106' ) , ('\243', '\1107' ) , ('\244', '\1108' ) , ('\245', '\1109' ) , ('\246', '\1110' ) , ('\247', '\1111' ) , ('\248', '\1112' ) , ('\249', '\1113' ) , ('\250', '\1114' ) , ('\251', '\1115' ) , ('\252', '\1116' ) , ('\253', '\167' ) , ('\254', '\1118' ) , ('\255', '\1119' ) ] iso_8859_6 :: [(Char, Char)] iso_8859_6 = [ ('\172', '\1548' ) , ('\187', '\1563' ) , ('\191', '\1567' ) , ('\193', '\1569' ) , ('\194', '\1570' ) , ('\195', '\1571' ) , ('\196', '\1572' ) , ('\197', '\1573' ) , ('\198', '\1574' ) , ('\199', '\1575' ) , ('\200', '\1576' ) , ('\201', '\1577' ) , ('\202', '\1578' ) , ('\203', '\1579' ) , ('\204', '\1580' ) , ('\205', '\1581' ) , ('\206', '\1582' ) , ('\207', '\1583' ) , ('\208', '\1584' ) , ('\209', '\1585' ) , ('\210', '\1586' ) , ('\211', '\1587' ) , ('\212', '\1588' ) , ('\213', '\1589' ) , ('\214', '\1590' ) , ('\215', '\1591' ) , ('\216', '\1592' ) , ('\217', '\1593' ) , ('\218', '\1594' ) , ('\224', '\1600' ) , ('\225', '\1601' ) , ('\226', '\1602' ) , ('\227', '\1603' ) , ('\228', '\1604' ) , ('\229', '\1605' ) , ('\230', '\1606' ) , ('\231', '\1607' ) , ('\232', '\1608' ) , ('\233', '\1609' ) , ('\234', '\1610' ) , ('\235', '\1611' ) , ('\236', '\1612' ) , ('\237', '\1613' ) , ('\238', '\1614' ) , ('\239', '\1615' ) , ('\240', '\1616' ) , ('\241', '\1617' ) , ('\242', '\1618' ) ] iso_8859_7 :: [(Char, Char)] iso_8859_7 = [ ('\161', '\8216' ) , ('\162', '\8217' ) , ('\164', '\8364' ) , ('\165', '\8367' ) , ('\170', '\890' ) , ('\175', '\8213' ) , ('\180', '\900' ) , ('\181', '\901' ) , ('\182', '\902' ) , ('\184', '\904' ) , ('\185', '\905' ) , ('\186', '\906' ) , ('\188', '\908' ) , ('\190', '\910' ) , ('\191', '\911' ) , ('\192', '\912' ) , ('\193', '\913' ) , ('\194', '\914' ) , ('\195', '\915' ) , ('\196', '\916' ) , ('\197', '\917' ) , ('\198', '\918' ) , ('\199', '\919' ) , ('\200', '\920' ) , ('\201', '\921' ) , ('\202', '\922' ) , ('\203', '\923' ) , ('\204', '\924' ) , ('\205', '\925' ) , ('\206', '\926' ) , ('\207', '\927' ) , ('\208', '\928' ) , ('\209', '\929' ) , ('\211', '\931' ) , ('\212', '\932' ) , ('\213', '\933' ) , ('\214', '\934' ) , ('\215', '\935' ) , ('\216', '\936' ) , ('\217', '\937' ) , ('\218', '\938' ) , ('\219', '\939' ) , ('\220', '\940' ) , ('\221', '\941' ) , ('\222', '\942' ) , ('\223', '\943' ) , ('\224', '\944' ) , ('\225', '\945' ) , ('\226', '\946' ) , ('\227', '\947' ) , ('\228', '\948' ) , ('\229', '\949' ) , ('\230', '\950' ) , ('\231', '\951' ) , ('\232', '\952' ) , ('\233', '\953' ) , ('\234', '\954' ) , ('\235', '\955' ) , ('\236', '\956' ) , ('\237', '\957' ) , ('\238', '\958' ) , ('\239', '\959' ) , ('\240', '\960' ) , ('\241', '\961' ) , ('\242', '\962' ) , ('\243', '\963' ) , ('\244', '\964' ) , ('\245', '\965' ) , ('\246', '\966' ) , ('\247', '\967' ) , ('\248', '\968' ) , ('\249', '\969' ) , ('\250', '\970' ) , ('\251', '\971' ) , ('\252', '\972' ) , ('\253', '\973' ) , ('\254', '\974' ) ] iso_8859_8 :: [(Char, Char)] iso_8859_8 = [ ('\170', '\215' ) , ('\186', '\247' ) , ('\223', '\8215' ) , ('\224', '\1488' ) , ('\225', '\1489' ) , ('\226', '\1490' ) , ('\227', '\1491' ) , ('\228', '\1492' ) , ('\229', '\1493' ) , ('\230', '\1494' ) , ('\231', '\1495' ) , ('\232', '\1496' ) , ('\233', '\1497' ) , ('\234', '\1498' ) , ('\235', '\1499' ) , ('\236', '\1500' ) , ('\237', '\1501' ) , ('\238', '\1502' ) , ('\239', '\1503' ) , ('\240', '\1504' ) , ('\241', '\1505' ) , ('\242', '\1506' ) , ('\243', '\1507' ) , ('\244', '\1508' ) , ('\245', '\1509' ) , ('\246', '\1510' ) , ('\247', '\1511' ) , ('\248', '\1512' ) , ('\249', '\1513' ) , ('\250', '\1514' ) , ('\253', '\8206' ) , ('\254', '\8207' ) ] iso_8859_9 :: [(Char, Char)] iso_8859_9 = [ ('\208', '\286' ) , ('\221', '\304' ) , ('\222', '\350' ) , ('\240', '\287' ) , ('\253', '\305' ) , ('\254', '\351' ) ] iso_8859_10 :: [(Char, Char)] iso_8859_10 = [ ('\161', '\260' ) , ('\162', '\274' ) , ('\163', '\290' ) , ('\164', '\298' ) , ('\165', '\296' ) , ('\166', '\310' ) , ('\168', '\315' ) , ('\169', '\272' ) , ('\170', '\352' ) , ('\171', '\358' ) , ('\172', '\381' ) , ('\174', '\362' ) , ('\175', '\330' ) , ('\177', '\261' ) , ('\178', '\275' ) , ('\179', '\291' ) , ('\180', '\299' ) , ('\181', '\297' ) , ('\182', '\311' ) , ('\184', '\316' ) , ('\185', '\273' ) , ('\186', '\353' ) , ('\187', '\359' ) , ('\188', '\382' ) , ('\189', '\8213' ) , ('\190', '\363' ) , ('\191', '\331' ) , ('\192', '\256' ) , ('\199', '\302' ) , ('\200', '\268' ) , ('\202', '\280' ) , ('\204', '\278' ) , ('\209', '\325' ) , ('\210', '\332' ) , ('\215', '\360' ) , ('\217', '\370' ) , ('\224', '\257' ) , ('\231', '\303' ) , ('\232', '\269' ) , ('\234', '\281' ) , ('\236', '\279' ) , ('\241', '\326' ) , ('\242', '\333' ) , ('\247', '\361' ) , ('\249', '\371' ) , ('\255', '\312' ) ] iso_8859_11 :: [(Char, Char)] iso_8859_11 = [ ('\161', '\3585' ) , ('\162', '\3586' ) , ('\163', '\3587' ) , ('\164', '\3588' ) , ('\165', '\3589' ) , ('\166', '\3590' ) , ('\167', '\3591' ) , ('\168', '\3592' ) , ('\169', '\3593' ) , ('\170', '\3594' ) , ('\171', '\3595' ) , ('\172', '\3596' ) , ('\173', '\3597' ) , ('\174', '\3598' ) , ('\175', '\3599' ) , ('\176', '\3600' ) , ('\177', '\3601' ) , ('\178', '\3602' ) , ('\179', '\3603' ) , ('\180', '\3604' ) , ('\181', '\3605' ) , ('\182', '\3606' ) , ('\183', '\3607' ) , ('\184', '\3608' ) , ('\185', '\3609' ) , ('\186', '\3610' ) , ('\187', '\3611' ) , ('\188', '\3612' ) , ('\189', '\3613' ) , ('\190', '\3614' ) , ('\191', '\3615' ) , ('\192', '\3616' ) , ('\193', '\3617' ) , ('\194', '\3618' ) , ('\195', '\3619' ) , ('\196', '\3620' ) , ('\197', '\3621' ) , ('\198', '\3622' ) , ('\199', '\3623' ) , ('\200', '\3624' ) , ('\201', '\3625' ) , ('\202', '\3626' ) , ('\203', '\3627' ) , ('\204', '\3628' ) , ('\205', '\3629' ) , ('\206', '\3630' ) , ('\207', '\3631' ) , ('\208', '\3632' ) , ('\209', '\3633' ) , ('\210', '\3634' ) , ('\211', '\3635' ) , ('\212', '\3636' ) , ('\213', '\3637' ) , ('\214', '\3638' ) , ('\215', '\3639' ) , ('\216', '\3640' ) , ('\217', '\3641' ) , ('\218', '\3642' ) , ('\223', '\3647' ) , ('\224', '\3648' ) , ('\225', '\3649' ) , ('\226', '\3650' ) , ('\227', '\3651' ) , ('\228', '\3652' ) , ('\229', '\3653' ) , ('\230', '\3654' ) , ('\231', '\3655' ) , ('\232', '\3656' ) , ('\233', '\3657' ) , ('\234', '\3658' ) , ('\235', '\3659' ) , ('\236', '\3660' ) , ('\237', '\3661' ) , ('\238', '\3662' ) , ('\239', '\3663' ) , ('\240', '\3664' ) , ('\241', '\3665' ) , ('\242', '\3666' ) , ('\243', '\3667' ) , ('\244', '\3668' ) , ('\245', '\3669' ) , ('\246', '\3670' ) , ('\247', '\3671' ) , ('\248', '\3672' ) , ('\249', '\3673' ) , ('\250', '\3674' ) , ('\251', '\3675' ) ] iso_8859_13 :: [(Char, Char)] iso_8859_13 = [ ('\161', '\8221' ) , ('\165', '\8222' ) , ('\168', '\216' ) , ('\170', '\342' ) , ('\175', '\198' ) , ('\180', '\8220' ) , ('\184', '\248' ) , ('\186', '\343' ) , ('\191', '\230' ) , ('\192', '\260' ) , ('\193', '\302' ) , ('\194', '\256' ) , ('\195', '\262' ) , ('\198', '\280' ) , ('\199', '\274' ) , ('\200', '\268' ) , ('\202', '\377' ) , ('\203', '\278' ) , ('\204', '\290' ) , ('\205', '\310' ) , ('\206', '\298' ) , ('\207', '\315' ) , ('\208', '\352' ) , ('\209', '\323' ) , ('\210', '\325' ) , ('\212', '\332' ) , ('\216', '\370' ) , ('\217', '\321' ) , ('\218', '\346' ) , ('\219', '\362' ) , ('\221', '\379' ) , ('\222', '\381' ) , ('\224', '\261' ) , ('\225', '\303' ) , ('\226', '\257' ) , ('\227', '\263' ) , ('\230', '\281' ) , ('\231', '\275' ) , ('\232', '\269' ) , ('\234', '\378' ) , ('\235', '\279' ) , ('\236', '\291' ) , ('\237', '\311' ) , ('\238', '\299' ) , ('\239', '\316' ) , ('\240', '\353' ) , ('\241', '\324' ) , ('\242', '\326' ) , ('\244', '\333' ) , ('\248', '\371' ) , ('\249', '\322' ) , ('\250', '\347' ) , ('\251', '\363' ) , ('\253', '\380' ) , ('\254', '\382' ) , ('\255', '\8217' ) ] iso_8859_14 :: [(Char, Char)] iso_8859_14 = [ ('\161', '\7682' ) , ('\162', '\7683' ) , ('\164', '\266' ) , ('\165', '\267' ) , ('\166', '\7690' ) , ('\168', '\7808' ) , ('\170', '\7810' ) , ('\171', '\7691' ) , ('\172', '\7922' ) , ('\175', '\376' ) , ('\176', '\7710' ) , ('\177', '\7711' ) , ('\178', '\288' ) , ('\179', '\289' ) , ('\180', '\7744' ) , ('\181', '\7745' ) , ('\183', '\7766' ) , ('\184', '\7809' ) , ('\185', '\7767' ) , ('\186', '\7811' ) , ('\187', '\7776' ) , ('\188', '\7923' ) , ('\189', '\7812' ) , ('\190', '\7813' ) , ('\191', '\7777' ) , ('\208', '\372' ) , ('\215', '\7786' ) , ('\222', '\374' ) , ('\240', '\373' ) , ('\247', '\7787' ) , ('\254', '\375' ) ] iso_8859_15 :: [(Char, Char)] iso_8859_15 = [ ('\164', '\8364' ) , ('\166', '\352' ) , ('\168', '\353' ) , ('\180', '\381' ) , ('\184', '\382' ) , ('\188', '\338' ) , ('\189', '\339' ) , ('\190', '\376' ) ] iso_8859_16 :: [(Char, Char)] iso_8859_16 = [ ('\161', '\260' ) , ('\162', '\261' ) , ('\163', '\321' ) , ('\164', '\8364' ) , ('\165', '\8222' ) , ('\166', '\352' ) , ('\168', '\353' ) , ('\170', '\536' ) , ('\172', '\377' ) , ('\174', '\378' ) , ('\175', '\379' ) , ('\178', '\268' ) , ('\179', '\322' ) , ('\180', '\381' ) , ('\181', '\8221' ) , ('\184', '\382' ) , ('\185', '\269' ) , ('\186', '\537' ) , ('\188', '\338' ) , ('\189', '\339' ) , ('\190', '\376' ) , ('\191', '\380' ) , ('\195', '\258' ) , ('\197', '\262' ) , ('\208', '\272' ) , ('\209', '\323' ) , ('\213', '\336' ) , ('\215', '\346' ) , ('\216', '\368' ) , ('\221', '\280' ) , ('\222', '\538' ) , ('\227', '\259' ) , ('\229', '\263' ) , ('\240', '\273' ) , ('\241', '\324' ) , ('\245', '\337' ) , ('\247', '\347' ) , ('\248', '\369' ) , ('\253', '\281' ) , ('\254', '\539' ) ] hxt-unicode-9.0.2.4/src/Data/String/0000755000000000000000000000000012465156120015211 5ustar0000000000000000hxt-unicode-9.0.2.4/src/Data/String/Unicode.hs0000644000000000000000000005363212465156120017144 0ustar0000000000000000-- ------------------------------------------------------------ {- | Module : Data.String.Unicode Copyright : Copyright (C) 2010- Uwe Schmidt License : MIT Maintainer : Uwe Schmidt (uwe@fh-wedel.de) Stability : stable Portability: portable Unicode and UTF-8 Conversion Functions -} -- ------------------------------------------------------------ module Data.String.Unicode ( -- * Unicode Type declarations Unicode, UString, UTF8Char, UTF8String, UStringWithErrors, DecodingFct, DecodingFctEmbedErrors, utf8ToUnicode , utf8ToUnicodeEmbedErrors , latin1ToUnicode , ucs2ToUnicode , ucs2BigEndianToUnicode , ucs2LittleEndianToUnicode , utf16beToUnicode , utf16leToUnicode , unicodeCharToUtf8 , unicodeToUtf8 , unicodeToXmlEntity , unicodeToLatin1 , unicodeRemoveNoneAscii , unicodeRemoveNoneLatin1 , intToCharRef , intToCharRefHex , intToHexString , getDecodingFct , getDecodingFctEmbedErrors , getOutputEncodingFct , normalizeNL , guessEncoding , getOutputEncodingFct' , unicodeCharToUtf8' , unicodeCharToXmlEntity' , unicodeCharToLatin1' ) where import Data.Char (toUpper) import Data.Char.IsoLatinTables import Data.Char.Properties.XMLCharProps (isXml1ByteChar, isXmlLatin1Char) import Data.String.EncodingNames import Data.String.UTF8Decoding (decodeUtf8, decodeUtf8EmbedErrors) -- ------------------------------------------------------------ -- | Unicode is represented as the Char type -- Precondition for this is the support of Unicode character range -- in the compiler (e.g. ghc but not hugs) type Unicode = Char -- | the type for Unicode strings type UString = [Unicode] -- | UTF-8 charachters are represented by the Char type type UTF8Char = Char -- | UTF-8 strings are implemented as Haskell strings type UTF8String = String -- | Decoding function with a pair containing the result string and a list of decoding errors as result type DecodingFct = String -> (UString, [String]) type UStringWithErrors = [Either String Char] -- | Decoding function where decoding errors are interleaved with decoded characters type DecodingFctEmbedErrors = String -> UStringWithErrors -- ------------------------------------------------------------ -- | -- conversion from Unicode strings (UString) to UTF8 encoded strings. unicodeToUtf8 :: UString -> UTF8String unicodeToUtf8 = concatMap unicodeCharToUtf8 -- | -- conversion from Unicode (Char) to a UTF8 encoded string. unicodeCharToUtf8 :: Unicode -> UTF8String unicodeCharToUtf8 c | i >= 0 && i <= 0x0000007F -- 1 byte UTF8 (7 bits) = [ toEnum i ] | i >= 0x00000080 && i <= 0x000007FF -- 2 byte UTF8 (5 + 6 bits) = [ toEnum (0xC0 + i `div` 0x40) , toEnum (0x80 + i `mod` 0x40) ] | i >= 0x00000800 && i <= 0x0000FFFF -- 3 byte UTF8 (4 + 6 + 6 bits) = [ toEnum (0xE0 + i `div` 0x1000) , toEnum (0x80 + (i `div` 0x40) `mod` 0x40) , toEnum (0x80 + i `mod` 0x40) ] | i >= 0x00010000 && i <= 0x001FFFFF -- 4 byte UTF8 (3 + 6 + 6 + 6 bits) = [ toEnum (0xF0 + i `div` 0x40000) , toEnum (0x80 + (i `div` 0x1000) `mod` 0x40) , toEnum (0x80 + (i `div` 0x40) `mod` 0x40) , toEnum (0x80 + i `mod` 0x40) ] | i >= 0x00200000 && i <= 0x03FFFFFF -- 5 byte UTF8 (2 + 6 + 6 + 6 + 6 bits) = [ toEnum (0xF8 + i `div` 0x1000000) , toEnum (0x80 + (i `div` 0x40000) `mod` 0x40) , toEnum (0x80 + (i `div` 0x1000) `mod` 0x40) , toEnum (0x80 + (i `div` 0x40) `mod` 0x40) , toEnum (0x80 + i `mod` 0x40) ] | i >= 0x04000000 && i <= 0x7FFFFFFF -- 6 byte UTF8 (1 + 6 + 6 + 6 + 6 + 6 bits) = [ toEnum (0xFC + i `div` 0x40000000) , toEnum (0x80 + (i `div` 0x1000000) `mod` 0x40) , toEnum (0x80 + (i `div` 0x40000) `mod` 0x40) , toEnum (0x80 + (i `div` 0x1000) `mod` 0x40) , toEnum (0x80 + (i `div` 0x40) `mod` 0x40) , toEnum (0x80 + i `mod` 0x40) ] | otherwise -- other values not supported = error ("unicodeCharToUtf8: illegal integer argument " ++ show i) where i = fromEnum c -- ------------------------------------------------------------ -- | -- code conversion from latin1 to Unicode latin1ToUnicode :: String -> UString latin1ToUnicode = id latinToUnicode :: [(Char, Char)] -> String -> UString latinToUnicode tt = map charToUni where charToUni c = foldr (\(src,dst) r -> case compare c src of EQ -> dst LT -> c {- not found in table -} GT -> r) c tt -- | conversion from ASCII to unicode with check for legal ASCII char set -- -- Structure of decoding function copied from 'Data.Char.UTF8.decode'. decodeAscii :: DecodingFct decodeAscii = swap . partitionEither . decodeAsciiEmbedErrors decodeAsciiEmbedErrors :: String -> UStringWithErrors decodeAsciiEmbedErrors str = map (\(c,pos) -> if isValid c then Right c else Left (toErrStr c pos)) posStr where posStr = zip str [(0::Int)..] toErrStr errChr pos = " at input position " ++ show pos ++ ": none ASCII char " ++ show errChr isValid x = x < '\x80' -- | -- UCS-2 big endian to Unicode conversion ucs2BigEndianToUnicode :: String -> UString ucs2BigEndianToUnicode (b : l : r) = toEnum (fromEnum b * 256 + fromEnum l) : ucs2BigEndianToUnicode r ucs2BigEndianToUnicode [] = [] ucs2BigEndianToUnicode _ = [] -- error "illegal UCS-2 byte input sequence with odd length" -- is ignored (garbage in, garbage out) -- ------------------------------------------------------------ -- | -- UCS-2 little endian to Unicode conversion ucs2LittleEndianToUnicode :: String -> UString ucs2LittleEndianToUnicode (l : b : r) = toEnum (fromEnum b * 256 + fromEnum l) : ucs2LittleEndianToUnicode r ucs2LittleEndianToUnicode [] = [] ucs2LittleEndianToUnicode [_] = [] -- error "illegal UCS-2 byte input sequence with odd length" -- is ignored -- ------------------------------------------------------------ -- | -- UCS-2 to UTF-8 conversion with byte order mark analysis ucs2ToUnicode :: String -> UString ucs2ToUnicode ('\xFE':'\xFF':s) -- 2 byte mark for big endian encoding = ucs2BigEndianToUnicode s ucs2ToUnicode ('\xFF':'\xFE':s) -- 2 byte mark for little endian encoding = ucs2LittleEndianToUnicode s ucs2ToUnicode s = ucs2BigEndianToUnicode s -- default: big endian -- ------------------------------------------------------------ -- | -- UTF-8 to Unicode conversion with deletion of leading byte order mark, as described in XML standard F.1 utf8ToUnicode :: DecodingFct utf8ToUnicode ('\xEF':'\xBB':'\xBF':s) -- remove byte order mark ( XML standard F.1 ) = decodeUtf8 s utf8ToUnicode s = decodeUtf8 s utf8ToUnicodeEmbedErrors :: DecodingFctEmbedErrors utf8ToUnicodeEmbedErrors ('\xEF':'\xBB':'\xBF':s) -- remove byte order mark ( XML standard F.1 ) = decodeUtf8EmbedErrors s utf8ToUnicodeEmbedErrors s = decodeUtf8EmbedErrors s -- ------------------------------------------------------------ -- | -- UTF-16 big endian to UTF-8 conversion with removal of byte order mark utf16beToUnicode :: String -> UString utf16beToUnicode ('\xFE':'\xFF':s) -- remove byte order mark = ucs2BigEndianToUnicode s utf16beToUnicode s = ucs2BigEndianToUnicode s -- ------------------------------------------------------------ -- | -- UTF-16 little endian to UTF-8 conversion with removal of byte order mark utf16leToUnicode :: String -> UString utf16leToUnicode ('\xFF':'\xFE':s) -- remove byte order mark = ucs2LittleEndianToUnicode s utf16leToUnicode s = ucs2LittleEndianToUnicode s -- ------------------------------------------------------------ -- | -- substitute all Unicode characters, that are not legal 1-byte -- UTF-8 XML characters by a character reference. -- -- This function can be used to translate all text nodes and -- attribute values into pure ascii. -- -- see also : 'unicodeToLatin1' unicodeToXmlEntity :: UString -> String unicodeToXmlEntity = escape isXml1ByteChar (intToCharRef . fromEnum) -- | -- substitute all Unicode characters, that are not legal latin1 -- UTF-8 XML characters by a character reference. -- -- This function can be used to translate all text nodes and -- attribute values into ISO latin1. -- -- see also : 'unicodeToXmlEntity' unicodeToLatin1 :: UString -> String unicodeToLatin1 = escape isXmlLatin1Char (intToCharRef . fromEnum) -- | -- substitute selected characters -- The @check@ function returns 'True' whenever a character needs to substitution -- The function @esc@ computes a substitute. escape :: (Unicode -> Bool) -> (Unicode -> String) -> UString -> String escape check esc = concatMap (\uc -> if check uc then [uc] else esc uc) -- | -- removes all non ascii chars, may be used to transform -- a document into a pure ascii representation by removing -- all non ascii chars from tag and attibute names -- -- see also : 'unicodeRemoveNoneLatin1', 'unicodeToXmlEntity' unicodeRemoveNoneAscii :: UString -> String unicodeRemoveNoneAscii = filter isXml1ByteChar -- | -- removes all non latin1 chars, may be used to transform -- a document into a pure ascii representation by removing -- all non ascii chars from tag and attibute names -- -- see also : 'unicodeRemoveNoneAscii', 'unicodeToLatin1' unicodeRemoveNoneLatin1 :: UString -> String unicodeRemoveNoneLatin1 = filter isXmlLatin1Char -- ------------------------------------------------------------ -- | -- convert an Unicode into a XML character reference. -- -- see also : 'intToCharRefHex' intToCharRef :: Int -> String intToCharRef i = "&#" ++ show i ++ ";" -- | -- convert an Unicode into a XML hexadecimal character reference. -- -- see also: 'intToCharRef' intToCharRefHex :: Int -> String intToCharRefHex i = "&#x" ++ h2 ++ ";" where h1 = intToHexString i h2 = if length h1 `mod` 2 == 1 then '0': h1 else h1 -- ------------------------------------------------------------ intToHexString :: Int -> String intToHexString i | i == 0 = "0" | i > 0 = intToStr i | otherwise = error ("intToHexString: negative argument " ++ show i) where intToStr 0 = "" intToStr i' = intToStr (i' `div` 16) ++ [fourBitsToChar (i' `mod` 16)] fourBitsToChar :: Int -> Char fourBitsToChar i = "0123456789ABCDEF" !! i {-# INLINE fourBitsToChar #-} -- ------------------------------------------------------------ -- -- | White Space (XML Standard 2.3) and -- end of line handling (2.11) -- -- \#x0D and \#x0D\#x0A are mapped to \#x0A normalizeNL :: String -> String normalizeNL ('\r' : '\n' : rest) = '\n' : normalizeNL rest normalizeNL ('\r' : rest) = '\n' : normalizeNL rest normalizeNL (c : rest) = c : normalizeNL rest normalizeNL [] = [] -- ------------------------------------------------------------ -- | -- the table of supported character encoding schemes and the associated -- conversion functions into Unicode:q {- This table could be derived from decodingTableEither, but this way it is certainly more efficient. -} decodingTable :: [(String, DecodingFct)] decodingTable = [ (utf8, utf8ToUnicode ) , (isoLatin1, liftDecFct latin1ToUnicode ) , (usAscii, decodeAscii ) , (ucs2, liftDecFct ucs2ToUnicode ) , (utf16, liftDecFct ucs2ToUnicode ) , (utf16be, liftDecFct utf16beToUnicode ) , (utf16le, liftDecFct utf16leToUnicode ) , (iso8859_2, liftDecFct (latinToUnicode iso_8859_2) ) , (iso8859_3, liftDecFct (latinToUnicode iso_8859_3) ) , (iso8859_4, liftDecFct (latinToUnicode iso_8859_4) ) , (iso8859_5, liftDecFct (latinToUnicode iso_8859_5) ) , (iso8859_6, liftDecFct (latinToUnicode iso_8859_6) ) , (iso8859_7, liftDecFct (latinToUnicode iso_8859_7) ) , (iso8859_8, liftDecFct (latinToUnicode iso_8859_8) ) , (iso8859_9, liftDecFct (latinToUnicode iso_8859_9) ) , (iso8859_10, liftDecFct (latinToUnicode iso_8859_10) ) , (iso8859_11, liftDecFct (latinToUnicode iso_8859_11) ) , (iso8859_13, liftDecFct (latinToUnicode iso_8859_13) ) , (iso8859_14, liftDecFct (latinToUnicode iso_8859_14) ) , (iso8859_15, liftDecFct (latinToUnicode iso_8859_15) ) , (iso8859_16, liftDecFct (latinToUnicode iso_8859_16) ) , (unicodeString, liftDecFct id ) , ("", liftDecFct id ) -- default ] where liftDecFct df = \ s -> (df s, []) -- | -- the lookup function for selecting the decoding function getDecodingFct :: String -> Maybe DecodingFct getDecodingFct enc = lookup (map toUpper enc) decodingTable -- | -- Similar to 'decodingTable' but it embeds errors -- in the string of decoded characters. decodingTableEmbedErrors :: [(String, DecodingFctEmbedErrors)] decodingTableEmbedErrors = [ (utf8, utf8ToUnicodeEmbedErrors ) , (isoLatin1, liftDecFct latin1ToUnicode ) , (usAscii, decodeAsciiEmbedErrors ) , (ucs2, liftDecFct ucs2ToUnicode ) , (utf16, liftDecFct ucs2ToUnicode ) , (utf16be, liftDecFct utf16beToUnicode ) , (utf16le, liftDecFct utf16leToUnicode ) , (iso8859_2, liftDecFct (latinToUnicode iso_8859_2) ) , (iso8859_3, liftDecFct (latinToUnicode iso_8859_3) ) , (iso8859_4, liftDecFct (latinToUnicode iso_8859_4) ) , (iso8859_5, liftDecFct (latinToUnicode iso_8859_5) ) , (iso8859_6, liftDecFct (latinToUnicode iso_8859_6) ) , (iso8859_7, liftDecFct (latinToUnicode iso_8859_7) ) , (iso8859_8, liftDecFct (latinToUnicode iso_8859_8) ) , (iso8859_9, liftDecFct (latinToUnicode iso_8859_9) ) , (iso8859_10, liftDecFct (latinToUnicode iso_8859_10) ) , (iso8859_11, liftDecFct (latinToUnicode iso_8859_11) ) , (iso8859_13, liftDecFct (latinToUnicode iso_8859_13) ) , (iso8859_14, liftDecFct (latinToUnicode iso_8859_14) ) , (iso8859_15, liftDecFct (latinToUnicode iso_8859_15) ) , (iso8859_16, liftDecFct (latinToUnicode iso_8859_16) ) , (unicodeString, liftDecFct id ) , ("", liftDecFct id ) -- default ] where liftDecFct df = map Right . df -- | -- the lookup function for selecting the decoding function getDecodingFctEmbedErrors :: String -> Maybe DecodingFctEmbedErrors getDecodingFctEmbedErrors enc = lookup (map toUpper enc) decodingTableEmbedErrors -- | -- the table of supported output encoding schemes and the associated -- conversion functions from Unicode outputEncodingTable :: [(String, (UString -> String))] outputEncodingTable = [ (utf8, unicodeToUtf8 ) , (isoLatin1, unicodeToLatin1 ) , (usAscii, unicodeToXmlEntity ) , (unicodeString, id ) , ("", unicodeToUtf8 ) -- default ] -- | -- the lookup function for selecting the encoding function getOutputEncodingFct :: String -> Maybe (String -> UString) getOutputEncodingFct enc = lookup (map toUpper enc) outputEncodingTable -- ------------------------------------------------------------ -- guessEncoding :: String -> String guessEncoding ('\xFF':'\xFE':'\x00':'\x00':_) = "UCS-4LE" -- with byte order mark guessEncoding ('\xFF':'\xFE':_) = "UTF-16LE" -- with byte order mark guessEncoding ('\xFE':'\xFF':'\x00':'\x00':_) = "UCS-4-3421" -- with byte order mark guessEncoding ('\xFE':'\xFF':_) = "UTF-16BE" -- with byte order mark guessEncoding ('\xEF':'\xBB':'\xBF':_) = utf8 -- with byte order mark guessEncoding ('\x00':'\x00':'\xFE':'\xFF':_) = "UCS-4BE" -- with byte order mark guessEncoding ('\x00':'\x00':'\xFF':'\xFE':_) = "UCS-4-2143" -- with byte order mark guessEncoding ('\x00':'\x00':'\x00':'\x3C':_) = "UCS-4BE" -- "<" of " (b,a) swap (x,y) = (y,x) {-# INLINE swap #-} partitionEither :: [Either a b] -> ([a], [b]) partitionEither = foldr (\x ~(ls,rs) -> either (\l -> (l:ls,rs)) (\r -> (ls,r:rs)) x) ([],[]) {-# INLINE partitionEither #-} -- ------------------------------------------------------------ -- output encoding for bytestrings -- | -- the table of supported output encoding schemes and the associated -- conversion functions from Unicode type StringFct = String -> String outputEncodingTable' :: [(String, (Char -> StringFct))] outputEncodingTable' = [ (utf8, unicodeCharToUtf8' ) , (isoLatin1, unicodeCharToLatin1' ) , (usAscii, unicodeCharToXmlEntity' ) , ("", unicodeCharToUtf8' ) -- default ] -- | -- the lookup function for selecting the encoding function getOutputEncodingFct' :: String -> Maybe (Char -> StringFct) getOutputEncodingFct' enc = lookup (map toUpper enc) outputEncodingTable' -- ------------------------------------------------------------ -- | -- conversion from Unicode (Char) to a UTF8 encoded string. unicodeCharToUtf8' :: Char -> StringFct unicodeCharToUtf8' c | i >= 0 && i <= 0x0000007F -- 1 byte UTF8 (7 bits) = (c :) | i >= 0x00000080 && i <= 0x000007FF -- 2 byte UTF8 (5 + 6 bits) = ((toEnum (0xC0 + i `div` 0x40) ) :) . ((toEnum (0x80 + i `mod` 0x40)) :) | i >= 0x00000800 && i <= 0x0000FFFF -- 3 byte UTF8 (4 + 6 + 6 bits) = ((toEnum (0xE0 + i `div` 0x1000) ) :) . ((toEnum (0x80 + (i `div` 0x40) `mod` 0x40)) :) . ((toEnum (0x80 + i `mod` 0x40)) :) | i >= 0x00010000 && i <= 0x001FFFFF -- 4 byte UTF8 (3 + 6 + 6 + 6 bits) -- extension to encode 21 bit values = ((toEnum (0xF0 + i `div` 0x40000) ) :) . ((toEnum (0x80 + (i `div` 0x1000) `mod` 0x40)) :) . ((toEnum (0x80 + (i `div` 0x40) `mod` 0x40)) :) . ((toEnum (0x80 + i `mod` 0x40)) :) | i >= 0x00200000 && i <= 0x03FFFFFF -- 5 byte UTF8 (2 + 6 + 6 + 6 + 6 bits) -- extension to encode 26 bit values = ((toEnum (0xF8 + i `div` 0x1000000) ) :) . ((toEnum (0x80 + (i `div` 0x40000) `mod` 0x40)) :) . ((toEnum (0x80 + (i `div` 0x1000) `mod` 0x40)) :) . ((toEnum (0x80 + (i `div` 0x40) `mod` 0x40)) :) . ((toEnum (0x80 + i `mod` 0x40)) :) | i >= 0x04000000 && i <= 0x7FFFFFFF -- 6 byte UTF8 (1 + 6 + 6 + 6 + 6 + 6 bits) -- extension to encode 31 bit values = ((toEnum (0xFC + i `div` 0x40000000) ) :) . ((toEnum (0x80 + (i `div` 0x1000000) `mod` 0x40)) :) . ((toEnum (0x80 + (i `div` 0x40000) `mod` 0x40)) :) . ((toEnum (0x80 + (i `div` 0x1000) `mod` 0x40)) :) . ((toEnum (0x80 + (i `div` 0x40) `mod` 0x40)) :) . ((toEnum (0x80 + i `mod` 0x40)) :) | otherwise -- other values not supported = error ("unicodeCharToUtf8: illegal integer argument " ++ show i) where i = fromEnum c -- ------------------------------------------------------------ -- | -- substitute all Unicode characters, that are not legal 1-byte -- UTF-8 XML characters by a character reference. unicodeCharToXmlEntity' :: Char -> StringFct unicodeCharToXmlEntity' c | isXml1ByteChar c = (c :) | otherwise = ((intToCharRef . fromEnum $ c) ++) -- ------------------------------------------------------------ -- | -- substitute all Unicode characters, that are not legal latin1 -- UTF-8 XML characters by a character reference. unicodeCharToLatin1' :: Char -> StringFct unicodeCharToLatin1' c | isXmlLatin1Char c = (c :) | otherwise = ((intToCharRef . fromEnum $ c) ++) -- ------------------------------------------------------------ hxt-unicode-9.0.2.4/src/Data/String/EncodingNames.hs0000644000000000000000000000300512465156120020255 0ustar0000000000000000-- ------------------------------------------------------------ {- | Module : Data.String.EncodingNames Copyright : Copyright (C) 2010 Uwe Schmidt License : MIT Maintainer : Uwe Schmidt (uwe@fh-wedel.de) Stability : stable Portability: portable Constants for character encodings -} -- ------------------------------------------------------------ module Data.String.EncodingNames where -- ------------------------------------------------------------ -- -- encoding names isoLatin1 , iso8859_1, iso8859_2, iso8859_3, iso8859_4, iso8859_5 , iso8859_6, iso8859_7, iso8859_8, iso8859_9, iso8859_10 , iso8859_11, iso8859_13, iso8859_14, iso8859_15, iso8859_16 , usAscii, ucs2, utf8, utf16, utf16be, utf16le, unicodeString :: String isoLatin1 = iso8859_1 iso8859_1 = "ISO-8859-1" iso8859_2 = "ISO-8859-2" iso8859_3 = "ISO-8859-3" iso8859_4 = "ISO-8859-4" iso8859_5 = "ISO-8859-5" iso8859_6 = "ISO-8859-6" iso8859_7 = "ISO-8859-7" iso8859_8 = "ISO-8859-8" iso8859_9 = "ISO-8859-9" iso8859_10 = "ISO-8859-10" iso8859_11 = "ISO-8859-11" iso8859_13 = "ISO-8859-13" iso8859_14 = "ISO-8859-14" iso8859_15 = "ISO-8859-15" iso8859_16 = "ISO-8859-16" usAscii = "US-ASCII" ucs2 = "ISO-10646-UCS-2" utf8 = "UTF-8" utf16 = "UTF-16" utf16be = "UTF-16BE" utf16le = "UTF-16LE" unicodeString = "UNICODE" -- ------------------------------------------------------------ hxt-unicode-9.0.2.4/src/Data/String/UTF8Decoding.hs0000644000000000000000000000253612465156120017736 0ustar0000000000000000-- ------------------------------------------------------------ {- | Module : Data.String.UTF8Decoding Copyright : Copyright (C) 2010- Uwe Schmidt License : MIT Maintainer : Uwe Schmidt (uwe@fh-wedel.de) Stability : stable Portability: portable Interface for Data.Char.UTF8 funtions -} -- ------------------------------------------------------------ module Data.String.UTF8Decoding ( decodeUtf8, decodeUtf8EmbedErrors, decodeUtf8IgnoreErrors, ) where import qualified Data.String.UTF8 as UTF8 import Data.Word (Word8) -- | calls 'Data.Char.UTF8.decode' for parsing and decoding UTF-8 decodeUtf8 :: String -> (String, [String]) decodeUtf8 str = (res, map (uncurry toErrStr) errs) where (res, errs) = UTF8.decode . stringToByteString $ str decodeUtf8IgnoreErrors :: String -> String decodeUtf8IgnoreErrors = fst . decodeUtf8 decodeUtf8EmbedErrors :: String -> [Either String Char] decodeUtf8EmbedErrors str = map (either (Left . uncurry toErrStr) Right) $ UTF8.decodeEmbedErrors $ stringToByteString $ str stringToByteString :: String -> [Word8] stringToByteString = map (toEnum . fromEnum) toErrStr :: UTF8.Error -> Int -> String toErrStr err pos = " at input position " ++ show pos ++ ": " ++ show err -- ------------------------------------------------------------ hxt-unicode-9.0.2.4/src/Data/String/UTF8.hs0000644000000000000000000003177212465156120016305 0ustar0000000000000000{- Copyright (c) 2002, members of the Haskell Internationalisation Working Group 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 name of the Haskell Internationalisation Working Group nor the names of its 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. This module provides lazy stream encoding/decoding facilities for UTF-8, the Unicode Transformation Format with 8-bit words. 2002-09-02 Sven Moritz Hallberg -} {- 2007-04-30 Henning Thielemann: Slight changes to make decode lazy. The calls of 'reverse' in the original version have broken laziness and thus had memory leaks. -} module Data.String.UTF8 ( encode , decode , decodeEmbedErrors , encodeOne , decodeOne , Error -- Haddock does not want to document signatures with private types -- these functions should be moved to a utility module ) where import Data.Char (ord, chr) import Data.Word (Word8, Word16, Word32) import Data.Bits (shiftL, shiftR, (.&.), (.|.)) import Data.List (unfoldr) -- - UTF-8 in General - -- Adapted from the Unicode standard, version 3.2, -- Table 3.1 "UTF-8 Bit Distribution" (excluded are UTF-16 encodings): -- Scalar 1st Byte 2nd Byte 3rd Byte 4th Byte -- 000000000xxxxxxx 0xxxxxxx -- 00000yyyyyxxxxxx 110yyyyy 10xxxxxx -- zzzzyyyyyyxxxxxx 1110zzzz 10yyyyyy 10xxxxxx -- 000uuuzzzzzzyyyyyyxxxxxx 11110uuu 10zzzzzz 10yyyyyy 10xxxxxx -- Also from the Unicode standard, version 3.2, -- Table 3.1B "Legal UTF-8 Byte Sequences": -- Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte -- U+0000..U+007F 00..7F -- U+0080..U+07FF C2..DF 80..BF -- U+0800..U+0FFF E0 A0..BF 80..BF -- U+1000..U+CFFF E1..EC 80..BF 80..BF -- U+D000..U+D7FF ED 80..9F 80..BF -- U+D800..U+DFFF ill-formed -- U+E000..U+FFFF EE..EF 80..BF 80..BF -- U+10000..U+3FFFF F0 90..BF 80..BF 80..BF -- U+40000..U+FFFFF F1..F3 80..BF 80..BF 80..BF -- U+100000..U+10FFFF F4 80..8F 80..BF 80..BF -- - Encoding Functions - -- Must the encoder ensure that no illegal byte sequences are output or -- can we trust the Haskell system to supply only legal values? -- For now I include error case for the surrogate values U+D800..U+DFFF and -- out-of-range scalars. -- The function is pretty much a transscript of table 3.1B with error checks. -- It dispatches the actual encoding to functions specific to the number of -- required bytes. encodeOne :: Char -> [Word8] encodeOne c -- The report guarantees in (6.1.2) that this won't happen: -- | n < 0 = error "encodeUTF8: ord returned a negative value" | n < 0x0080 = encodeOne_onebyte n8 | n < 0x0800 = encodeOne_twobyte n16 | n < 0xD800 = encodeOne_threebyte n16 | n < 0xE000 = error "encodeUTF8: ord returned a surrogate value" | n < 0x10000 = encodeOne_threebyte n16 -- Haskell 98 only talks about 16 bit characters, but ghc handles 20.1. | n < 0x10FFFF = encodeOne_fourbyte n32 | otherwise = error "encodeUTF8: ord returned a value above 0x10FFFF" where n = ord c :: Int n8 = fromIntegral n :: Word8 n16 = fromIntegral n :: Word16 n32 = fromIntegral n :: Word32 -- With the above, a stream decoder is trivial: encode :: [Char] -> [Word8] encode = concatMap encodeOne -- Now follow the individual encoders for certain numbers of bytes... -- _ -- / | __ ___ __ __ -- / ^| // /__/ // // -- /.==| \\ //_ // // -- It's // || // \_/_//_//_ and it's here to stay! encodeOne_onebyte :: Word8 -> [Word8] encodeOne_onebyte cp = [cp] -- 00000yyyyyxxxxxx -> 110yyyyy 10xxxxxx encodeOne_twobyte :: Word16 -> [Word8] encodeOne_twobyte cp = [(0xC0.|.ys), (0x80.|.xs)] where xs, ys :: Word8 ys = fromIntegral (shiftR cp 6) xs = (fromIntegral cp) .&. 0x3F -- zzzzyyyyyyxxxxxx -> 1110zzzz 10yyyyyy 10xxxxxx encodeOne_threebyte :: Word16 -> [Word8] encodeOne_threebyte cp = [(0xE0.|.zs), (0x80.|.ys), (0x80.|.xs)] where xs, ys, zs :: Word8 xs = (fromIntegral cp) .&. 0x3F ys = (fromIntegral (shiftR cp 6)) .&. 0x3F zs = fromIntegral (shiftR cp 12) -- 000uuuzzzzzzyyyyyyxxxxxx -> 11110uuu 10zzzzzz 10yyyyyy 10xxxxxx encodeOne_fourbyte :: Word32 -> [Word8] encodeOne_fourbyte cp = [0xF0.|.us, 0x80.|.zs, 0x80.|.ys, 0x80.|.xs] where xs, ys, zs, us :: Word8 xs = (fromIntegral cp) .&. 0x3F ys = (fromIntegral (shiftR cp 6)) .&. 0x3F zs = (fromIntegral (shiftR cp 12)) .&. 0x3F us = fromIntegral (shiftR cp 18) -- - Decoding - -- The decoding is a bit more involved. The byte sequence could contain all -- sorts of corruptions. The user must be able to either notice or ignore these -- errors. -- I will first look at the decoding of a single character. The process -- consumes a certain number of bytes from the input. It returns the -- remaining input and either an error and the index of its occurance in the -- byte sequence or the decoded character. data Error -- The first byte in a sequence starts with either zero, two, three, or four -- ones and one zero to indicate the length of the sequence. If it doesn't, -- it is invalid. It is dropped and the next byte interpreted as the start -- of a new sequence. = InvalidFirstByte -- All bytes in the sequence except the first match the bit pattern 10xxxxxx. -- If one doesn't, it is invalid. The sequence up to that point is dropped -- and the "invalid" byte interpreted as the start of a new sequence. The error -- includes the length of the partial sequence and the number of expected bytes. | InvalidLaterByte Int -- the byte at relative index n was invalid -- If a sequence ends prematurely, it has been truncated. It dropped and -- decoding stops. The error reports the actual and expected lengths of the -- sequence. | Truncated Int Int -- only n of m expected bytes were present -- Some sequences would represent code points which would be encoded as a -- shorter sequence by a conformant encoder. Such non-shortest sequences are -- considered erroneous and dropped. The error reports the actual and -- expected number of bytes used. | NonShortest Int Int -- n instead of m bytes were used -- Unicode code points are in the range of [0..0x10FFFF]. Any values outside -- of those bounds are simply invalid. | ValueOutOfBounds -- There is no such thing as "surrogate pairs" any more in UTF-8. The -- corresponding code points now form illegal byte sequences. | Surrogate deriving (Show, Eq) -- Second, third, and fourth bytes share the common requirement to start -- with the bit sequence 10. So, here's the function to check that property. first_bits_not_10 :: Word8 -> Bool first_bits_not_10 b | (b.&.0xC0) /= 0x80 = True | otherwise = False -- Erm, OK, the single-character decoding function's return type is a bit -- longish. It is a tripel: -- - The first component contains the decoded character or an error -- if the byte sequence was erroneous. -- - The second component contains the number of bytes that were consumed -- from the input. -- - The third component contains the remaining bytes of input. decodeOne :: [Word8] -> (Either Error Char, Int, [Word8]) decodeOne bs@(b1:rest) | b1 < 0x80 = decodeOne_onebyte bs | b1 < 0xC0 = (Left InvalidFirstByte, 1, rest) | b1 < 0xE0 = decodeOne_twobyte bs | b1 < 0xF0 = decodeOne_threebyte bs | b1 < 0xF5 = decodeOne_fourbyte bs | otherwise = (Left ValueOutOfBounds, 1, rest) decodeOne [] = error "UTF8.decodeOne: No input" -- 0xxxxxxx -> 000000000xxxxxxx decodeOne_onebyte :: [Word8] -> (Either Error Char, Int, [Word8]) decodeOne_onebyte (b:bs) = (Right (cpToChar b), 1, bs) decodeOne_onebyte[] = error "UTF8.decodeOne_onebyte: No input (can't happen)" cpToChar :: Integral a => a -> Char cpToChar = chr . fromIntegral -- 110yyyyy 10xxxxxx -> 00000yyyyyxxxxxx decodeOne_twobyte :: [Word8] -> (Either Error Char, Int, [Word8]) decodeOne_twobyte (_:[]) = (Left (Truncated 1 2), 1, []) decodeOne_twobyte (b1:b2:bs) | b1 < 0xC2 = (Left (NonShortest 2 1), 2, bs) | first_bits_not_10 b2 = (Left (InvalidLaterByte 1), 1, (b2:bs)) | otherwise = (Right (cpToChar result), 2, bs) where xs, ys, result :: Word32 xs = fromIntegral (b2.&.0x3F) ys = fromIntegral (b1.&.0x1F) result = shiftL ys 6 .|. xs decodeOne_twobyte[] = error "UTF8.decodeOne_twobyte: No input (can't happen)" -- 1110zzzz 10yyyyyy 10xxxxxx -> zzzzyyyyyyxxxxxx decodeOne_threebyte :: [Word8] -> (Either Error Char, Int, [Word8]) decodeOne_threebyte (_:[]) = threebyte_truncated 1 decodeOne_threebyte (_:_:[]) = threebyte_truncated 2 decodeOne_threebyte bs@(b1:b2:b3:rest) | first_bits_not_10 b2 = (Left (InvalidLaterByte 1), 1, drop 1 bs) | first_bits_not_10 b3 = (Left (InvalidLaterByte 2), 2, drop 2 bs) | result < 0x0080 = (Left (NonShortest 3 1), 3, rest) | result < 0x0800 = (Left (NonShortest 3 2), 3, rest) | result >= 0xD800 && result < 0xE000 = (Left Surrogate, 3, rest) | otherwise = (Right (cpToChar result), 3, rest) where xs, ys, zs, result :: Word32 xs = fromIntegral (b3.&.0x3F) ys = fromIntegral (b2.&.0x3F) zs = fromIntegral (b1.&.0x0F) result = shiftL zs 12 .|. shiftL ys 6 .|. xs decodeOne_threebyte[] = error "UTF8.decodeOne_threebyte: No input (can't happen)" threebyte_truncated :: Int -> (Either Error Char, Int, [Word8]) threebyte_truncated n = (Left (Truncated n 3), n, []) -- 11110uuu 10zzzzzz 10yyyyyy 10xxxxxx -> 000uuuzzzzzzyyyyyyxxxxxx decodeOne_fourbyte :: [Word8] -> (Either Error Char, Int, [Word8]) decodeOne_fourbyte (_:[]) = fourbyte_truncated 1 decodeOne_fourbyte (_:_:[]) = fourbyte_truncated 2 decodeOne_fourbyte (_:_:_:[]) = fourbyte_truncated 3 decodeOne_fourbyte bs@(b1:b2:b3:b4:rest) | first_bits_not_10 b2 = (Left (InvalidLaterByte 1), 1, drop 1 bs) | first_bits_not_10 b3 = (Left (InvalidLaterByte 2), 2, drop 2 bs) | first_bits_not_10 b4 = (Left (InvalidLaterByte 3), 3, drop 3 bs) | result < 0x0080 = (Left (NonShortest 4 1), 4, rest) | result < 0x0800 = (Left (NonShortest 4 2), 4, rest) | result < 0x10000 = (Left (NonShortest 4 3), 4, rest) | result > 0x10FFFF = (Left ValueOutOfBounds, 4, rest) | otherwise = (Right (cpToChar result), 4, rest) where xs, ys, zs, us, result :: Word32 xs = fromIntegral (b4 .&. 0x3F) ys = fromIntegral (b3 .&. 0x3F) zs = fromIntegral (b2 .&. 0x3F) us = fromIntegral (b1 .&. 0x07) result = xs .|. shiftL ys 6 .|. shiftL zs 12 .|. shiftL us 18 decodeOne_fourbyte[] = error "UTF8.decodeOne_fourbyte: No input (can't happen)" fourbyte_truncated :: Int -> (Either Error Char, Int, [Word8]) fourbyte_truncated n = (Left (Truncated n 4), n, []) -- The decoder examines all input, recording decoded characters as well as -- error-index pairs along the way. decode :: [Word8] -> ([Char], [(Error,Int)]) decode = swap . partitionEither . decodeEmbedErrors decodeEmbedErrors :: [Word8] -> [Either (Error,Int) Char] decodeEmbedErrors = unfoldr (\(pos,xs) -> toMaybe (not $ null xs) (let (c,n,rest) = decodeOne xs in (either (\err -> Left (err,pos)) Right c, (pos+n,rest)))) . (,) 0 swap :: (a,b) -> (b,a) swap (x,y) = (y,x) {-# INLINE swap #-} partitionEither :: [Either a b] -> ([a], [b]) partitionEither = foldr (\x ~(ls,rs) -> either (\l -> (l:ls,rs)) (\r -> (ls,r:rs)) x) ([],[]) {-# INLINE partitionEither #-} toMaybe :: Bool -> a -> Maybe a toMaybe False _ = Nothing toMaybe True x = Just x {-# INLINE toMaybe #-} -- ------------------------------------------------------------