| /* Determine a canonical name for the current locale's character encoding. |
| |
| Copyright (C) 2000-2006, 2008-2022 Free Software Foundation, Inc. |
| |
| This file 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. |
| |
| This file 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 program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Bruno Haible <bruno@clisp.org>. */ |
| |
| #include <config.h> |
| |
| /* Specification. */ |
| #include "localcharset.h" |
| |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| |
| #if defined __APPLE__ && defined __MACH__ && HAVE_LANGINFO_CODESET |
| # define DARWIN7 /* Darwin 7 or newer, i.e. Mac OS X 10.3 or newer */ |
| #endif |
| |
| #if defined _WIN32 && !defined __CYGWIN__ |
| # define WINDOWS_NATIVE |
| # include <locale.h> |
| #endif |
| |
| #if defined __EMX__ |
| /* Assume EMX program runs on OS/2, even if compiled under DOS. */ |
| # ifndef OS2 |
| # define OS2 |
| # endif |
| #endif |
| |
| #if !defined WINDOWS_NATIVE |
| # if HAVE_LANGINFO_CODESET |
| # include <langinfo.h> |
| # else |
| # if 0 /* see comment regarding use of setlocale(), below */ |
| # include <locale.h> |
| # endif |
| # endif |
| # ifdef __CYGWIN__ |
| # define WIN32_LEAN_AND_MEAN |
| # include <windows.h> |
| # endif |
| #elif defined WINDOWS_NATIVE |
| # define WIN32_LEAN_AND_MEAN |
| # include <windows.h> |
| /* For the use of setlocale() below, the Gnulib override in setlocale.c is |
| not needed; see the platform lists in setlocale_null.m4. */ |
| # undef setlocale |
| #endif |
| #if defined OS2 |
| # define INCL_DOS |
| # include <os2.h> |
| #endif |
| |
| /* For MB_CUR_MAX_L */ |
| #if defined DARWIN7 |
| # include <xlocale.h> |
| #endif |
| |
| |
| #if HAVE_LANGINFO_CODESET || defined WINDOWS_NATIVE || defined OS2 |
| |
| /* On these platforms, we use a mapping from non-canonical encoding name |
| to GNU canonical encoding name. */ |
| |
| /* With glibc-2.1 or newer, we don't need any canonicalization, |
| because glibc has iconv and both glibc and libiconv support all |
| GNU canonical names directly. */ |
| # if !((defined __GNU_LIBRARY__ && __GLIBC__ >= 2) || defined __UCLIBC__) |
| |
| struct table_entry |
| { |
| const char alias[11+1]; |
| const char canonical[11+1]; |
| }; |
| |
| /* Table of platform-dependent mappings, sorted in ascending order. */ |
| static const struct table_entry alias_table[] = |
| { |
| # if defined __FreeBSD__ /* FreeBSD */ |
| /*{ "ARMSCII-8", "ARMSCII-8" },*/ |
| { "Big5", "BIG5" }, |
| { "C", "ASCII" }, |
| /*{ "CP1131", "CP1131" },*/ |
| /*{ "CP1251", "CP1251" },*/ |
| /*{ "CP866", "CP866" },*/ |
| /*{ "GB18030", "GB18030" },*/ |
| /*{ "GB2312", "GB2312" },*/ |
| /*{ "GBK", "GBK" },*/ |
| /*{ "ISCII-DEV", "?" },*/ |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-13", "ISO-8859-13" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| { "ISO8859-9", "ISO-8859-9" }, |
| /*{ "KOI8-R", "KOI8-R" },*/ |
| /*{ "KOI8-U", "KOI8-U" },*/ |
| { "SJIS", "SHIFT_JIS" }, |
| { "US-ASCII", "ASCII" }, |
| { "eucCN", "GB2312" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" } |
| # define alias_table_defined |
| # endif |
| # if defined __NetBSD__ /* NetBSD */ |
| { "646", "ASCII" }, |
| /*{ "ARMSCII-8", "ARMSCII-8" },*/ |
| /*{ "BIG5", "BIG5" },*/ |
| { "Big5-HKSCS", "BIG5-HKSCS" }, |
| /*{ "CP1251", "CP1251" },*/ |
| /*{ "CP866", "CP866" },*/ |
| /*{ "GB18030", "GB18030" },*/ |
| /*{ "GB2312", "GB2312" },*/ |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-13", "ISO-8859-13" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-4", "ISO-8859-4" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| /*{ "KOI8-R", "KOI8-R" },*/ |
| /*{ "KOI8-U", "KOI8-U" },*/ |
| /*{ "PT154", "PT154" },*/ |
| { "SJIS", "SHIFT_JIS" }, |
| { "eucCN", "GB2312" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" }, |
| { "eucTW", "EUC-TW" } |
| # define alias_table_defined |
| # endif |
| # if defined __OpenBSD__ /* OpenBSD */ |
| { "646", "ASCII" }, |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-13", "ISO-8859-13" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-4", "ISO-8859-4" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| { "US-ASCII", "ASCII" } |
| # define alias_table_defined |
| # endif |
| # if defined __APPLE__ && defined __MACH__ /* Mac OS X */ |
| /* Darwin 7.5 has nl_langinfo(CODESET), but sometimes its value is |
| useless: |
| - It returns the empty string when LANG is set to a locale of the |
| form ll_CC, although ll_CC/LC_CTYPE is a symlink to an UTF-8 |
| LC_CTYPE file. |
| - The environment variables LANG, LC_CTYPE, LC_ALL are not set by |
| the system; nl_langinfo(CODESET) returns "US-ASCII" in this case. |
| - The documentation says: |
| "... all code that calls BSD system routines should ensure |
| that the const *char parameters of these routines are in UTF-8 |
| encoding. All BSD system functions expect their string |
| parameters to be in UTF-8 encoding and nothing else." |
| It also says |
| "An additional caveat is that string parameters for files, |
| paths, and other file-system entities must be in canonical |
| UTF-8. In a canonical UTF-8 Unicode string, all decomposable |
| characters are decomposed ..." |
| but this is not true: You can pass non-decomposed UTF-8 strings |
| to file system functions, and it is the OS which will convert |
| them to decomposed UTF-8 before accessing the file system. |
| - The Apple Terminal application displays UTF-8 by default. |
| - However, other applications are free to use different encodings: |
| - xterm uses ISO-8859-1 by default. |
| - TextEdit uses MacRoman by default. |
| We prefer UTF-8 over decomposed UTF-8-MAC because one should |
| minimize the use of decomposed Unicode. Unfortunately, through the |
| Darwin file system, decomposed UTF-8 strings are leaked into user |
| space nevertheless. |
| Then there are also the locales with encodings other than US-ASCII |
| and UTF-8. These locales can be occasionally useful to users (e.g. |
| when grepping through ISO-8859-1 encoded text files), when all their |
| file names are in US-ASCII. |
| */ |
| { "ARMSCII-8", "ARMSCII-8" }, |
| { "Big5", "BIG5" }, |
| { "Big5HKSCS", "BIG5-HKSCS" }, |
| { "CP1131", "CP1131" }, |
| { "CP1251", "CP1251" }, |
| { "CP866", "CP866" }, |
| { "CP949", "CP949" }, |
| { "GB18030", "GB18030" }, |
| { "GB2312", "GB2312" }, |
| { "GBK", "GBK" }, |
| /*{ "ISCII-DEV", "?" },*/ |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-13", "ISO-8859-13" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-4", "ISO-8859-4" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| { "ISO8859-9", "ISO-8859-9" }, |
| { "KOI8-R", "KOI8-R" }, |
| { "KOI8-U", "KOI8-U" }, |
| { "PT154", "PT154" }, |
| { "SJIS", "SHIFT_JIS" }, |
| { "eucCN", "GB2312" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" } |
| # define alias_table_defined |
| # endif |
| # if defined _AIX /* AIX */ |
| /*{ "GBK", "GBK" },*/ |
| { "IBM-1046", "CP1046" }, |
| { "IBM-1124", "CP1124" }, |
| { "IBM-1129", "CP1129" }, |
| { "IBM-1252", "CP1252" }, |
| { "IBM-850", "CP850" }, |
| { "IBM-856", "CP856" }, |
| { "IBM-921", "ISO-8859-13" }, |
| { "IBM-922", "CP922" }, |
| { "IBM-932", "CP932" }, |
| { "IBM-943", "CP943" }, |
| { "IBM-eucCN", "GB2312" }, |
| { "IBM-eucJP", "EUC-JP" }, |
| { "IBM-eucKR", "EUC-KR" }, |
| { "IBM-eucTW", "EUC-TW" }, |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "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" }, |
| { "TIS-620", "TIS-620" }, |
| /*{ "UTF-8", "UTF-8" },*/ |
| { "big5", "BIG5" } |
| # define alias_table_defined |
| # endif |
| # if defined __hpux /* HP-UX */ |
| { "SJIS", "SHIFT_JIS" }, |
| { "arabic8", "HP-ARABIC8" }, |
| { "big5", "BIG5" }, |
| { "cp1251", "CP1251" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" }, |
| { "eucTW", "EUC-TW" }, |
| { "gb18030", "GB18030" }, |
| { "greek8", "HP-GREEK8" }, |
| { "hebrew8", "HP-HEBREW8" }, |
| { "hkbig5", "BIG5-HKSCS" }, |
| { "hp15CN", "GB2312" }, |
| { "iso88591", "ISO-8859-1" }, |
| { "iso885913", "ISO-8859-13" }, |
| { "iso885915", "ISO-8859-15" }, |
| { "iso88592", "ISO-8859-2" }, |
| { "iso88594", "ISO-8859-4" }, |
| { "iso88595", "ISO-8859-5" }, |
| { "iso88596", "ISO-8859-6" }, |
| { "iso88597", "ISO-8859-7" }, |
| { "iso88598", "ISO-8859-8" }, |
| { "iso88599", "ISO-8859-9" }, |
| { "kana8", "HP-KANA8" }, |
| { "koi8r", "KOI8-R" }, |
| { "roman8", "HP-ROMAN8" }, |
| { "tis620", "TIS-620" }, |
| { "turkish8", "HP-TURKISH8" }, |
| { "utf8", "UTF-8" } |
| # define alias_table_defined |
| # endif |
| # if defined __sgi /* IRIX */ |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| { "ISO8859-9", "ISO-8859-9" }, |
| { "eucCN", "GB2312" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" }, |
| { "eucTW", "EUC-TW" } |
| # define alias_table_defined |
| # endif |
| # if defined __osf__ /* OSF/1 */ |
| /*{ "GBK", "GBK" },*/ |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-4", "ISO-8859-4" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| { "ISO8859-8", "ISO-8859-8" }, |
| { "ISO8859-9", "ISO-8859-9" }, |
| { "KSC5601", "CP949" }, |
| { "SJIS", "SHIFT_JIS" }, |
| { "TACTIS", "TIS-620" }, |
| /*{ "UTF-8", "UTF-8" },*/ |
| { "big5", "BIG5" }, |
| { "cp850", "CP850" }, |
| { "dechanyu", "DEC-HANYU" }, |
| { "dechanzi", "GB2312" }, |
| { "deckanji", "DEC-KANJI" }, |
| { "deckorean", "EUC-KR" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" }, |
| { "eucTW", "EUC-TW" }, |
| { "sdeckanji", "EUC-JP" } |
| # define alias_table_defined |
| # endif |
| # if defined __sun /* Solaris */ |
| { "5601", "EUC-KR" }, |
| { "646", "ASCII" }, |
| /*{ "BIG5", "BIG5" },*/ |
| { "Big5-HKSCS", "BIG5-HKSCS" }, |
| { "GB18030", "GB18030" }, |
| /*{ "GBK", "GBK" },*/ |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-11", "TIS-620" }, |
| { "ISO8859-13", "ISO-8859-13" }, |
| { "ISO8859-15", "ISO-8859-15" }, |
| { "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" }, |
| { "PCK", "SHIFT_JIS" }, |
| { "TIS620.2533", "TIS-620" }, |
| /*{ "UTF-8", "UTF-8" },*/ |
| { "ansi-1251", "CP1251" }, |
| { "cns11643", "EUC-TW" }, |
| { "eucJP", "EUC-JP" }, |
| { "gb2312", "GB2312" }, |
| { "koi8-r", "KOI8-R" } |
| # define alias_table_defined |
| # endif |
| # if defined __minix /* Minix */ |
| { "646", "ASCII" } |
| # define alias_table_defined |
| # endif |
| # if defined WINDOWS_NATIVE || defined __CYGWIN__ /* Windows */ |
| { "CP1361", "JOHAB" }, |
| { "CP20127", "ASCII" }, |
| { "CP20866", "KOI8-R" }, |
| { "CP20936", "GB2312" }, |
| { "CP21866", "KOI8-RU" }, |
| { "CP28591", "ISO-8859-1" }, |
| { "CP28592", "ISO-8859-2" }, |
| { "CP28593", "ISO-8859-3" }, |
| { "CP28594", "ISO-8859-4" }, |
| { "CP28595", "ISO-8859-5" }, |
| { "CP28596", "ISO-8859-6" }, |
| { "CP28597", "ISO-8859-7" }, |
| { "CP28598", "ISO-8859-8" }, |
| { "CP28599", "ISO-8859-9" }, |
| { "CP28605", "ISO-8859-15" }, |
| { "CP38598", "ISO-8859-8" }, |
| { "CP51932", "EUC-JP" }, |
| { "CP51936", "GB2312" }, |
| { "CP51949", "EUC-KR" }, |
| { "CP51950", "EUC-TW" }, |
| { "CP54936", "GB18030" }, |
| { "CP65001", "UTF-8" }, |
| { "CP936", "GBK" } |
| # define alias_table_defined |
| # endif |
| # if defined OS2 /* OS/2 */ |
| /* The list of encodings is taken from "List of OS/2 Codepages" |
| by Alex Taylor: |
| <http://altsan.org/os2/toolkits/uls/index.html#codepages>. |
| See also "__convcp() of kLIBC": |
| <https://github.com/bitwiseworks/libc/blob/master/src/emx/src/lib/locale/__convcp.c>. */ |
| { "CP1004", "CP1252" }, |
| /*{ "CP1041", "CP943" },*/ |
| /*{ "CP1088", "CP949" },*/ |
| { "CP1089", "ISO-8859-6" }, |
| /*{ "CP1114", "CP950" },*/ |
| /*{ "CP1115", "GB2312" },*/ |
| { "CP1208", "UTF-8" }, |
| /*{ "CP1380", "GB2312" },*/ |
| { "CP1381", "GB2312" }, |
| { "CP1383", "GB2312" }, |
| { "CP1386", "GBK" }, |
| /*{ "CP301", "CP943" },*/ |
| { "CP3372", "EUC-JP" }, |
| { "CP4946", "CP850" }, |
| /*{ "CP5048", "JIS_X0208-1990" },*/ |
| /*{ "CP5049", "JIS_X0212-1990" },*/ |
| /*{ "CP5067", "KS_C_5601-1987" },*/ |
| { "CP813", "ISO-8859-7" }, |
| { "CP819", "ISO-8859-1" }, |
| { "CP878", "KOI8-R" }, |
| /*{ "CP897", "CP943" },*/ |
| { "CP912", "ISO-8859-2" }, |
| { "CP913", "ISO-8859-3" }, |
| { "CP914", "ISO-8859-4" }, |
| { "CP915", "ISO-8859-5" }, |
| { "CP916", "ISO-8859-8" }, |
| { "CP920", "ISO-8859-9" }, |
| { "CP921", "ISO-8859-13" }, |
| { "CP923", "ISO-8859-15" }, |
| /*{ "CP941", "CP943" },*/ |
| /*{ "CP947", "CP950" },*/ |
| /*{ "CP951", "CP949" },*/ |
| /*{ "CP952", "JIS_X0208-1990" },*/ |
| /*{ "CP953", "JIS_X0212-1990" },*/ |
| { "CP954", "EUC-JP" }, |
| { "CP964", "EUC-TW" }, |
| { "CP970", "EUC-KR" }, |
| /*{ "CP971", "KS_C_5601-1987" },*/ |
| { "IBM-1004", "CP1252" }, |
| /*{ "IBM-1006", "?" },*/ |
| /*{ "IBM-1008", "?" },*/ |
| /*{ "IBM-1041", "CP943" },*/ |
| /*{ "IBM-1051", "?" },*/ |
| /*{ "IBM-1088", "CP949" },*/ |
| { "IBM-1089", "ISO-8859-6" }, |
| /*{ "IBM-1098", "?" },*/ |
| /*{ "IBM-1114", "CP950" },*/ |
| /*{ "IBM-1115", "GB2312" },*/ |
| /*{ "IBM-1116", "?" },*/ |
| /*{ "IBM-1117", "?" },*/ |
| /*{ "IBM-1118", "?" },*/ |
| /*{ "IBM-1119", "?" },*/ |
| { "IBM-1124", "CP1124" }, |
| { "IBM-1125", "CP1125" }, |
| { "IBM-1131", "CP1131" }, |
| { "IBM-1208", "UTF-8" }, |
| { "IBM-1250", "CP1250" }, |
| { "IBM-1251", "CP1251" }, |
| { "IBM-1252", "CP1252" }, |
| { "IBM-1253", "CP1253" }, |
| { "IBM-1254", "CP1254" }, |
| { "IBM-1255", "CP1255" }, |
| { "IBM-1256", "CP1256" }, |
| { "IBM-1257", "CP1257" }, |
| /*{ "IBM-1275", "?" },*/ |
| /*{ "IBM-1276", "?" },*/ |
| /*{ "IBM-1277", "?" },*/ |
| /*{ "IBM-1280", "?" },*/ |
| /*{ "IBM-1281", "?" },*/ |
| /*{ "IBM-1282", "?" },*/ |
| /*{ "IBM-1283", "?" },*/ |
| /*{ "IBM-1380", "GB2312" },*/ |
| { "IBM-1381", "GB2312" }, |
| { "IBM-1383", "GB2312" }, |
| { "IBM-1386", "GBK" }, |
| /*{ "IBM-301", "CP943" },*/ |
| { "IBM-3372", "EUC-JP" }, |
| { "IBM-367", "ASCII" }, |
| { "IBM-437", "CP437" }, |
| { "IBM-4946", "CP850" }, |
| /*{ "IBM-5048", "JIS_X0208-1990" },*/ |
| /*{ "IBM-5049", "JIS_X0212-1990" },*/ |
| /*{ "IBM-5067", "KS_C_5601-1987" },*/ |
| { "IBM-813", "ISO-8859-7" }, |
| { "IBM-819", "ISO-8859-1" }, |
| { "IBM-850", "CP850" }, |
| /*{ "IBM-851", "?" },*/ |
| { "IBM-852", "CP852" }, |
| { "IBM-855", "CP855" }, |
| { "IBM-856", "CP856" }, |
| { "IBM-857", "CP857" }, |
| /*{ "IBM-859", "?" },*/ |
| { "IBM-860", "CP860" }, |
| { "IBM-861", "CP861" }, |
| { "IBM-862", "CP862" }, |
| { "IBM-863", "CP863" }, |
| { "IBM-864", "CP864" }, |
| { "IBM-865", "CP865" }, |
| { "IBM-866", "CP866" }, |
| /*{ "IBM-868", "?" },*/ |
| { "IBM-869", "CP869" }, |
| { "IBM-874", "CP874" }, |
| { "IBM-878", "KOI8-R" }, |
| /*{ "IBM-895", "?" },*/ |
| /*{ "IBM-897", "CP943" },*/ |
| /*{ "IBM-907", "?" },*/ |
| /*{ "IBM-909", "?" },*/ |
| { "IBM-912", "ISO-8859-2" }, |
| { "IBM-913", "ISO-8859-3" }, |
| { "IBM-914", "ISO-8859-4" }, |
| { "IBM-915", "ISO-8859-5" }, |
| { "IBM-916", "ISO-8859-8" }, |
| { "IBM-920", "ISO-8859-9" }, |
| { "IBM-921", "ISO-8859-13" }, |
| { "IBM-922", "CP922" }, |
| { "IBM-923", "ISO-8859-15" }, |
| { "IBM-932", "CP932" }, |
| /*{ "IBM-941", "CP943" },*/ |
| /*{ "IBM-942", "?" },*/ |
| { "IBM-943", "CP943" }, |
| /*{ "IBM-947", "CP950" },*/ |
| { "IBM-949", "CP949" }, |
| { "IBM-950", "CP950" }, |
| /*{ "IBM-951", "CP949" },*/ |
| /*{ "IBM-952", "JIS_X0208-1990" },*/ |
| /*{ "IBM-953", "JIS_X0212-1990" },*/ |
| { "IBM-954", "EUC-JP" }, |
| /*{ "IBM-955", "?" },*/ |
| { "IBM-964", "EUC-TW" }, |
| { "IBM-970", "EUC-KR" }, |
| /*{ "IBM-971", "KS_C_5601-1987" },*/ |
| { "IBM-eucCN", "GB2312" }, |
| { "IBM-eucJP", "EUC-JP" }, |
| { "IBM-eucKR", "EUC-KR" }, |
| { "IBM-eucTW", "EUC-TW" }, |
| { "IBM33722", "EUC-JP" }, |
| { "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" }, |
| /*{ "JISX0201-1976", "JISX0201-1976" },*/ |
| /*{ "JISX0208-1978", "?" },*/ |
| /*{ "JISX0208-1983", "JIS_X0208-1983" },*/ |
| /*{ "JISX0208-1990", "JIS_X0208-1990" },*/ |
| /*{ "JISX0212-1990", "JIS_X0212-1990" },*/ |
| /*{ "KSC5601-1987", "KS_C_5601-1987" },*/ |
| { "SJIS-1", "CP943" }, |
| { "SJIS-2", "CP943" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucKR", "EUC-KR" }, |
| { "eucTW-1993", "EUC-TW" } |
| # define alias_table_defined |
| # endif |
| # if defined VMS /* OpenVMS */ |
| /* The list of encodings is taken from the OpenVMS 7.3-1 documentation |
| "Compaq C Run-Time Library Reference Manual for OpenVMS systems" |
| section 10.7 "Handling Different Character Sets". */ |
| { "DECHANYU", "DEC-HANYU" }, |
| { "DECHANZI", "GB2312" }, |
| { "DECKANJI", "DEC-KANJI" }, |
| { "DECKOREAN", "EUC-KR" }, |
| { "ISO8859-1", "ISO-8859-1" }, |
| { "ISO8859-2", "ISO-8859-2" }, |
| { "ISO8859-5", "ISO-8859-5" }, |
| { "ISO8859-7", "ISO-8859-7" }, |
| { "ISO8859-8", "ISO-8859-8" }, |
| { "ISO8859-9", "ISO-8859-9" }, |
| { "SDECKANJI", "EUC-JP" }, |
| { "SJIS", "SHIFT_JIS" }, |
| { "eucJP", "EUC-JP" }, |
| { "eucTW", "EUC-TW" } |
| # define alias_table_defined |
| # endif |
| # ifndef alias_table_defined |
| /* Just a dummy entry, to avoid a C syntax error. */ |
| { "", "" } |
| # endif |
| }; |
| |
| # endif |
| |
| #else |
| |
| /* On these platforms, we use a mapping from locale name to GNU canonical |
| encoding name. */ |
| |
| struct table_entry |
| { |
| const char locale[17+1]; |
| const char canonical[11+1]; |
| }; |
| |
| /* Table of platform-dependent mappings, sorted in ascending order. */ |
| static const struct table_entry locale_table[] = |
| { |
| # if defined __FreeBSD__ /* FreeBSD 4.2 */ |
| { "cs_CZ.ISO_8859-2", "ISO-8859-2" }, |
| { "da_DK.DIS_8859-15", "ISO-8859-15" }, |
| { "da_DK.ISO_8859-1", "ISO-8859-1" }, |
| { "de_AT.DIS_8859-15", "ISO-8859-15" }, |
| { "de_AT.ISO_8859-1", "ISO-8859-1" }, |
| { "de_CH.DIS_8859-15", "ISO-8859-15" }, |
| { "de_CH.ISO_8859-1", "ISO-8859-1" }, |
| { "de_DE.DIS_8859-15", "ISO-8859-15" }, |
| { "de_DE.ISO_8859-1", "ISO-8859-1" }, |
| { "en_AU.DIS_8859-15", "ISO-8859-15" }, |
| { "en_AU.ISO_8859-1", "ISO-8859-1" }, |
| { "en_CA.DIS_8859-15", "ISO-8859-15" }, |
| { "en_CA.ISO_8859-1", "ISO-8859-1" }, |
| { "en_GB.DIS_8859-15", "ISO-8859-15" }, |
| { "en_GB.ISO_8859-1", "ISO-8859-1" }, |
| { "en_US.DIS_8859-15", "ISO-8859-15" }, |
| { "en_US.ISO_8859-1", "ISO-8859-1" }, |
| { "es_ES.DIS_8859-15", "ISO-8859-15" }, |
| { "es_ES.ISO_8859-1", "ISO-8859-1" }, |
| { "fi_FI.DIS_8859-15", "ISO-8859-15" }, |
| { "fi_FI.ISO_8859-1", "ISO-8859-1" }, |
| { "fr_BE.DIS_8859-15", "ISO-8859-15" }, |
| { "fr_BE.ISO_8859-1", "ISO-8859-1" }, |
| { "fr_CA.DIS_8859-15", "ISO-8859-15" }, |
| { "fr_CA.ISO_8859-1", "ISO-8859-1" }, |
| { "fr_CH.DIS_8859-15", "ISO-8859-15" }, |
| { "fr_CH.ISO_8859-1", "ISO-8859-1" }, |
| { "fr_FR.DIS_8859-15", "ISO-8859-15" }, |
| { "fr_FR.ISO_8859-1", "ISO-8859-1" }, |
| { "hr_HR.ISO_8859-2", "ISO-8859-2" }, |
| { "hu_HU.ISO_8859-2", "ISO-8859-2" }, |
| { "is_IS.DIS_8859-15", "ISO-8859-15" }, |
| { "is_IS.ISO_8859-1", "ISO-8859-1" }, |
| { "it_CH.DIS_8859-15", "ISO-8859-15" }, |
| { "it_CH.ISO_8859-1", "ISO-8859-1" }, |
| { "it_IT.DIS_8859-15", "ISO-8859-15" }, |
| { "it_IT.ISO_8859-1", "ISO-8859-1" }, |
| { "ja_JP.EUC", "EUC-JP" }, |
| { "ja_JP.SJIS", "SHIFT_JIS" }, |
| { "ja_JP.Shift_JIS", "SHIFT_JIS" }, |
| { "ko_KR.EUC", "EUC-KR" }, |
| { "la_LN.ASCII", "ASCII" }, |
| { "la_LN.DIS_8859-15", "ISO-8859-15" }, |
| { "la_LN.ISO_8859-1", "ISO-8859-1" }, |
| { "la_LN.ISO_8859-2", "ISO-8859-2" }, |
| { "la_LN.ISO_8859-4", "ISO-8859-4" }, |
| { "lt_LN.ASCII", "ASCII" }, |
| { "lt_LN.DIS_8859-15", "ISO-8859-15" }, |
| { "lt_LN.ISO_8859-1", "ISO-8859-1" }, |
| { "lt_LN.ISO_8859-2", "ISO-8859-2" }, |
| { "lt_LT.ISO_8859-4", "ISO-8859-4" }, |
| { "nl_BE.DIS_8859-15", "ISO-8859-15" }, |
| { "nl_BE.ISO_8859-1", "ISO-8859-1" }, |
| { "nl_NL.DIS_8859-15", "ISO-8859-15" }, |
| { "nl_NL.ISO_8859-1", "ISO-8859-1" }, |
| { "no_NO.DIS_8859-15", "ISO-8859-15" }, |
| { "no_NO.ISO_8859-1", "ISO-8859-1" }, |
| { "pl_PL.ISO_8859-2", "ISO-8859-2" }, |
| { "pt_PT.DIS_8859-15", "ISO-8859-15" }, |
| { "pt_PT.ISO_8859-1", "ISO-8859-1" }, |
| { "ru_RU.CP866", "CP866" }, |
| { "ru_RU.ISO_8859-5", "ISO-8859-5" }, |
| { "ru_RU.KOI8-R", "KOI8-R" }, |
| { "ru_SU.CP866", "CP866" }, |
| { "ru_SU.ISO_8859-5", "ISO-8859-5" }, |
| { "ru_SU.KOI8-R", "KOI8-R" }, |
| { "sl_SI.ISO_8859-2", "ISO-8859-2" }, |
| { "sv_SE.DIS_8859-15", "ISO-8859-15" }, |
| { "sv_SE.ISO_8859-1", "ISO-8859-1" }, |
| { "uk_UA.KOI8-U", "KOI8-U" }, |
| { "zh_CN.EUC", "GB2312" }, |
| { "zh_TW.BIG5", "BIG5" }, |
| { "zh_TW.Big5", "BIG5" } |
| # define locale_table_defined |
| # endif |
| # if defined __DJGPP__ /* DOS / DJGPP 2.03 */ |
| /* The encodings given here may not all be correct. |
| If you find that the encoding given for your language and |
| country is not the one your DOS machine actually uses, just |
| correct it in this file, and send a mail to |
| Juan Manuel Guerrero <juan.guerrero@gmx.de> |
| and <bug-gnulib@gnu.org>. */ |
| { "C", "ASCII" }, |
| { "ar", "CP864" }, |
| { "ar_AE", "CP864" }, |
| { "ar_DZ", "CP864" }, |
| { "ar_EG", "CP864" }, |
| { "ar_IQ", "CP864" }, |
| { "ar_IR", "CP864" }, |
| { "ar_JO", "CP864" }, |
| { "ar_KW", "CP864" }, |
| { "ar_MA", "CP864" }, |
| { "ar_OM", "CP864" }, |
| { "ar_QA", "CP864" }, |
| { "ar_SA", "CP864" }, |
| { "ar_SY", "CP864" }, |
| { "be", "CP866" }, |
| { "be_BE", "CP866" }, |
| { "bg", "CP866" }, /* not CP855 ?? */ |
| { "bg_BG", "CP866" }, /* not CP855 ?? */ |
| { "ca", "CP850" }, |
| { "ca_ES", "CP850" }, |
| { "cs", "CP852" }, |
| { "cs_CZ", "CP852" }, |
| { "da", "CP865" }, /* not CP850 ?? */ |
| { "da_DK", "CP865" }, /* not CP850 ?? */ |
| { "de", "CP850" }, |
| { "de_AT", "CP850" }, |
| { "de_CH", "CP850" }, |
| { "de_DE", "CP850" }, |
| { "el", "CP869" }, |
| { "el_GR", "CP869" }, |
| { "en", "CP850" }, |
| { "en_AU", "CP850" }, /* not CP437 ?? */ |
| { "en_CA", "CP850" }, |
| { "en_GB", "CP850" }, |
| { "en_NZ", "CP437" }, |
| { "en_US", "CP437" }, |
| { "en_ZA", "CP850" }, /* not CP437 ?? */ |
| { "eo", "CP850" }, |
| { "eo_EO", "CP850" }, |
| { "es", "CP850" }, |
| { "es_AR", "CP850" }, |
| { "es_BO", "CP850" }, |
| { "es_CL", "CP850" }, |
| { "es_CO", "CP850" }, |
| { "es_CR", "CP850" }, |
| { "es_CU", "CP850" }, |
| { "es_DO", "CP850" }, |
| { "es_EC", "CP850" }, |
| { "es_ES", "CP850" }, |
| { "es_GT", "CP850" }, |
| { "es_HN", "CP850" }, |
| { "es_MX", "CP850" }, |
| { "es_NI", "CP850" }, |
| { "es_PA", "CP850" }, |
| { "es_PE", "CP850" }, |
| { "es_PY", "CP850" }, |
| { "es_SV", "CP850" }, |
| { "es_UY", "CP850" }, |
| { "es_VE", "CP850" }, |
| { "et", "CP850" }, |
| { "et_EE", "CP850" }, |
| { "eu", "CP850" }, |
| { "eu_ES", "CP850" }, |
| { "fi", "CP850" }, |
| { "fi_FI", "CP850" }, |
| { "fr", "CP850" }, |
| { "fr_BE", "CP850" }, |
| { "fr_CA", "CP850" }, |
| { "fr_CH", "CP850" }, |
| { "fr_FR", "CP850" }, |
| { "ga", "CP850" }, |
| { "ga_IE", "CP850" }, |
| { "gd", "CP850" }, |
| { "gd_GB", "CP850" }, |
| { "gl", "CP850" }, |
| { "gl_ES", "CP850" }, |
| { "he", "CP862" }, |
| { "he_IL", "CP862" }, |
| { "hr", "CP852" }, |
| { "hr_HR", "CP852" }, |
| { "hu", "CP852" }, |
| { "hu_HU", "CP852" }, |
| { "id", "CP850" }, /* not CP437 ?? */ |
| { "id_ID", "CP850" }, /* not CP437 ?? */ |
| { "is", "CP861" }, /* not CP850 ?? */ |
| { "is_IS", "CP861" }, /* not CP850 ?? */ |
| { "it", "CP850" }, |
| { "it_CH", "CP850" }, |
| { "it_IT", "CP850" }, |
| { "ja", "CP932" }, |
| { "ja_JP", "CP932" }, |
| { "kr", "CP949" }, /* not CP934 ?? */ |
| { "kr_KR", "CP949" }, /* not CP934 ?? */ |
| { "lt", "CP775" }, |
| { "lt_LT", "CP775" }, |
| { "lv", "CP775" }, |
| { "lv_LV", "CP775" }, |
| { "mk", "CP866" }, /* not CP855 ?? */ |
| { "mk_MK", "CP866" }, /* not CP855 ?? */ |
| { "mt", "CP850" }, |
| { "mt_MT", "CP850" }, |
| { "nb", "CP865" }, /* not CP850 ?? */ |
| { "nb_NO", "CP865" }, /* not CP850 ?? */ |
| { "nl", "CP850" }, |
| { "nl_BE", "CP850" }, |
| { "nl_NL", "CP850" }, |
| { "nn", "CP865" }, /* not CP850 ?? */ |
| { "nn_NO", "CP865" }, /* not CP850 ?? */ |
| { "no", "CP865" }, /* not CP850 ?? */ |
| { "no_NO", "CP865" }, /* not CP850 ?? */ |
| { "pl", "CP852" }, |
| { "pl_PL", "CP852" }, |
| { "pt", "CP850" }, |
| { "pt_BR", "CP850" }, |
| { "pt_PT", "CP850" }, |
| { "ro", "CP852" }, |
| { "ro_RO", "CP852" }, |
| { "ru", "CP866" }, |
| { "ru_RU", "CP866" }, |
| { "sk", "CP852" }, |
| { "sk_SK", "CP852" }, |
| { "sl", "CP852" }, |
| { "sl_SI", "CP852" }, |
| { "sq", "CP852" }, |
| { "sq_AL", "CP852" }, |
| { "sr", "CP852" }, /* CP852 or CP866 or CP855 ?? */ |
| { "sr_CS", "CP852" }, /* CP852 or CP866 or CP855 ?? */ |
| { "sr_YU", "CP852" }, /* CP852 or CP866 or CP855 ?? */ |
| { "sv", "CP850" }, |
| { "sv_SE", "CP850" }, |
| { "th", "CP874" }, |
| { "th_TH", "CP874" }, |
| { "tr", "CP857" }, |
| { "tr_TR", "CP857" }, |
| { "uk", "CP1125" }, |
| { "uk_UA", "CP1125" }, |
| { "zh_CN", "GBK" }, |
| { "zh_TW", "CP950" } /* not CP938 ?? */ |
| # define locale_table_defined |
| # endif |
| # ifndef locale_table_defined |
| /* Just a dummy entry, to avoid a C syntax error. */ |
| { "", "" } |
| # endif |
| }; |
| |
| #endif |
| |
| |
| /* Determine the current locale's character encoding, and canonicalize it |
| into one of the canonical names listed below. |
| The result must not be freed; it is statically allocated. The result |
| becomes invalid when setlocale() is used to change the global locale, or |
| when the value of one of the environment variables LC_ALL, LC_CTYPE, LANG |
| is changed; threads in multithreaded programs should not do this. |
| If the canonical name cannot be determined, the result is a non-canonical |
| name. */ |
| |
| #ifdef STATIC |
| STATIC |
| #endif |
| const char * |
| locale_charset (void) |
| { |
| const char *codeset; |
| |
| /* This function must be multithread-safe. To achieve this without using |
| thread-local storage, we use a simple strcpy or memcpy to fill this static |
| buffer. Filling it through, for example, strcpy + strcat would not be |
| guaranteed to leave the buffer's contents intact if another thread is |
| currently accessing it. If necessary, the contents is first assembled in |
| a stack-allocated buffer. */ |
| |
| #if HAVE_LANGINFO_CODESET || defined WINDOWS_NATIVE || defined OS2 |
| |
| # if HAVE_LANGINFO_CODESET |
| |
| /* Most systems support nl_langinfo (CODESET) nowadays. */ |
| codeset = nl_langinfo (CODESET); |
| |
| # ifdef __CYGWIN__ |
| /* Cygwin < 1.7 does not have locales. nl_langinfo (CODESET) always |
| returns "US-ASCII". Return the suffix of the locale name from the |
| environment variables (if present) or the codepage as a number. */ |
| if (codeset != NULL && strcmp (codeset, "US-ASCII") == 0) |
| { |
| const char *locale; |
| static char resultbuf[2 + 10 + 1]; |
| |
| locale = getenv ("LC_ALL"); |
| if (locale == NULL || locale[0] == '\0') |
| { |
| locale = getenv ("LC_CTYPE"); |
| if (locale == NULL || locale[0] == '\0') |
| locale = getenv ("LANG"); |
| } |
| if (locale != NULL && locale[0] != '\0') |
| { |
| /* If the locale name contains an encoding after the dot, return |
| it. */ |
| const char *dot = strchr (locale, '.'); |
| |
| if (dot != NULL) |
| { |
| const char *modifier; |
| |
| dot++; |
| /* Look for the possible @... trailer and remove it, if any. */ |
| modifier = strchr (dot, '@'); |
| if (modifier == NULL) |
| return dot; |
| if (modifier - dot < sizeof (resultbuf)) |
| { |
| /* This way of filling resultbuf is multithread-safe. */ |
| memcpy (resultbuf, dot, modifier - dot); |
| resultbuf [modifier - dot] = '\0'; |
| return resultbuf; |
| } |
| } |
| } |
| |
| /* The Windows API has a function returning the locale's codepage as a |
| number: GetACP(). This encoding is used by Cygwin, unless the user |
| has set the environment variable CYGWIN=codepage:oem (which very few |
| people do). |
| Output directed to console windows needs to be converted (to |
| GetOEMCP() if the console is using a raster font, or to |
| GetConsoleOutputCP() if it is using a TrueType font). Cygwin does |
| this conversion transparently (see winsup/cygwin/fhandler_console.cc), |
| converting to GetConsoleOutputCP(). This leads to correct results, |
| except when SetConsoleOutputCP has been called and a raster font is |
| in use. */ |
| { |
| char buf[2 + 10 + 1]; |
| |
| sprintf (buf, "CP%u", GetACP ()); |
| strcpy (resultbuf, buf); |
| codeset = resultbuf; |
| } |
| } |
| # endif |
| |
| if (codeset == NULL) |
| /* The canonical name cannot be determined. */ |
| codeset = ""; |
| |
| # elif defined WINDOWS_NATIVE |
| |
| char buf[2 + 10 + 1]; |
| static char resultbuf[2 + 10 + 1]; |
| |
| /* The Windows API has a function returning the locale's codepage as |
| a number, but the value doesn't change according to what the |
| 'setlocale' call specified. So we use it as a last resort, in |
| case the string returned by 'setlocale' doesn't specify the |
| codepage. */ |
| char *current_locale = setlocale (LC_CTYPE, NULL); |
| char *pdot = strrchr (current_locale, '.'); |
| |
| if (pdot && 2 + strlen (pdot + 1) + 1 <= sizeof (buf)) |
| sprintf (buf, "CP%s", pdot + 1); |
| else |
| { |
| /* The Windows API has a function returning the locale's codepage as a |
| number: GetACP(). |
| When the output goes to a console window, it needs to be provided in |
| GetOEMCP() encoding if the console is using a raster font, or in |
| GetConsoleOutputCP() encoding if it is using a TrueType font. |
| But in GUI programs and for output sent to files and pipes, GetACP() |
| encoding is the best bet. */ |
| sprintf (buf, "CP%u", GetACP ()); |
| } |
| /* For a locale name such as "French_France.65001", in Windows 10, |
| setlocale now returns "French_France.utf8" instead. */ |
| if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0) |
| codeset = "UTF-8"; |
| else |
| { |
| strcpy (resultbuf, buf); |
| codeset = resultbuf; |
| } |
| |
| # elif defined OS2 |
| |
| const char *locale; |
| static char resultbuf[2 + 10 + 1]; |
| ULONG cp[3]; |
| ULONG cplen; |
| |
| codeset = NULL; |
| |
| /* Allow user to override the codeset, as set in the operating system, |
| with standard language environment variables. */ |
| locale = getenv ("LC_ALL"); |
| if (locale == NULL || locale[0] == '\0') |
| { |
| locale = getenv ("LC_CTYPE"); |
| if (locale == NULL || locale[0] == '\0') |
| locale = getenv ("LANG"); |
| } |
| if (locale != NULL && locale[0] != '\0') |
| { |
| /* If the locale name contains an encoding after the dot, return it. */ |
| const char *dot = strchr (locale, '.'); |
| |
| if (dot != NULL) |
| { |
| const char *modifier; |
| |
| dot++; |
| /* Look for the possible @... trailer and remove it, if any. */ |
| modifier = strchr (dot, '@'); |
| if (modifier == NULL) |
| return dot; |
| if (modifier - dot < sizeof (resultbuf)) |
| { |
| /* This way of filling resultbuf is multithread-safe. */ |
| memcpy (resultbuf, dot, modifier - dot); |
| resultbuf [modifier - dot] = '\0'; |
| return resultbuf; |
| } |
| } |
| |
| /* For the POSIX locale, don't use the system's codepage. */ |
| if (strcmp (locale, "C") == 0 || strcmp (locale, "POSIX") == 0) |
| codeset = ""; |
| } |
| |
| if (codeset == NULL) |
| { |
| /* OS/2 has a function returning the locale's codepage as a number. */ |
| if (DosQueryCp (sizeof (cp), cp, &cplen)) |
| codeset = ""; |
| else |
| { |
| char buf[2 + 10 + 1]; |
| |
| sprintf (buf, "CP%u", cp[0]); |
| strcpy (resultbuf, buf); |
| codeset = resultbuf; |
| } |
| } |
| |
| # else |
| |
| # error "Add code for other platforms here." |
| |
| # endif |
| |
| /* Resolve alias. */ |
| { |
| # ifdef alias_table_defined |
| /* On some platforms, UTF-8 locales are the most frequently used ones. |
| Speed up the common case and slow down the less common cases by |
| testing for this case first. */ |
| # if defined __OpenBSD__ || (defined __APPLE__ && defined __MACH__) || defined __sun || defined __CYGWIN__ |
| if (strcmp (codeset, "UTF-8") == 0) |
| goto done_table_lookup; |
| else |
| # endif |
| { |
| const struct table_entry * const table = alias_table; |
| size_t const table_size = |
| sizeof (alias_table) / sizeof (struct table_entry); |
| /* The table is sorted. Perform a binary search. */ |
| size_t hi = table_size; |
| size_t lo = 0; |
| while (lo < hi) |
| { |
| /* Invariant: |
| for i < lo, strcmp (table[i].alias, codeset) < 0, |
| for i >= hi, strcmp (table[i].alias, codeset) > 0. */ |
| size_t mid = (hi + lo) >> 1; /* >= lo, < hi */ |
| int cmp = strcmp (table[mid].alias, codeset); |
| if (cmp < 0) |
| lo = mid + 1; |
| else if (cmp > 0) |
| hi = mid; |
| else |
| { |
| /* Found an i with |
| strcmp (table[i].alias, codeset) == 0. */ |
| codeset = table[mid].canonical; |
| goto done_table_lookup; |
| } |
| } |
| } |
| if (0) |
| done_table_lookup: ; |
| else |
| # endif |
| { |
| /* Did not find it in the table. */ |
| /* On Mac OS X, all modern locales use the UTF-8 encoding. |
| BeOS and Haiku have a single locale, and it has UTF-8 encoding. */ |
| # if (defined __APPLE__ && defined __MACH__) || defined __BEOS__ || defined __HAIKU__ |
| codeset = "UTF-8"; |
| # else |
| /* Don't return an empty string. GNU libc and GNU libiconv interpret |
| the empty string as denoting "the locale's character encoding", |
| thus GNU libiconv would call this function a second time. */ |
| if (codeset[0] == '\0') |
| codeset = "ASCII"; |
| # endif |
| } |
| } |
| |
| #else |
| |
| /* On old systems which lack it, use setlocale or getenv. */ |
| const char *locale = NULL; |
| |
| /* But most old systems don't have a complete set of locales. Some |
| (like DJGPP) have only the C locale. Therefore we don't use setlocale |
| here; it would return "C" when it doesn't support the locale name the |
| user has set. */ |
| # if 0 |
| locale = setlocale (LC_CTYPE, NULL); |
| # endif |
| if (locale == NULL || locale[0] == '\0') |
| { |
| locale = getenv ("LC_ALL"); |
| if (locale == NULL || locale[0] == '\0') |
| { |
| locale = getenv ("LC_CTYPE"); |
| if (locale == NULL || locale[0] == '\0') |
| locale = getenv ("LANG"); |
| if (locale == NULL) |
| locale = ""; |
| } |
| } |
| |
| /* Map locale name to canonical encoding name. */ |
| { |
| # ifdef locale_table_defined |
| const struct table_entry * const table = locale_table; |
| size_t const table_size = |
| sizeof (locale_table) / sizeof (struct table_entry); |
| /* The table is sorted. Perform a binary search. */ |
| size_t hi = table_size; |
| size_t lo = 0; |
| while (lo < hi) |
| { |
| /* Invariant: |
| for i < lo, strcmp (table[i].locale, locale) < 0, |
| for i >= hi, strcmp (table[i].locale, locale) > 0. */ |
| size_t mid = (hi + lo) >> 1; /* >= lo, < hi */ |
| int cmp = strcmp (table[mid].locale, locale); |
| if (cmp < 0) |
| lo = mid + 1; |
| else if (cmp > 0) |
| hi = mid; |
| else |
| { |
| /* Found an i with |
| strcmp (table[i].locale, locale) == 0. */ |
| codeset = table[mid].canonical; |
| goto done_table_lookup; |
| } |
| } |
| if (0) |
| done_table_lookup: ; |
| else |
| # endif |
| { |
| /* Did not find it in the table. */ |
| /* On Mac OS X, all modern locales use the UTF-8 encoding. |
| BeOS and Haiku have a single locale, and it has UTF-8 encoding. */ |
| # if (defined __APPLE__ && defined __MACH__) || defined __BEOS__ || defined __HAIKU__ |
| codeset = "UTF-8"; |
| # else |
| /* The canonical name cannot be determined. */ |
| /* Don't return an empty string. GNU libc and GNU libiconv interpret |
| the empty string as denoting "the locale's character encoding", |
| thus GNU libiconv would call this function a second time. */ |
| codeset = "ASCII"; |
| # endif |
| } |
| } |
| |
| #endif |
| |
| #ifdef DARWIN7 |
| /* Mac OS X sets MB_CUR_MAX to 1 when LC_ALL=C, and "UTF-8" |
| (the default codeset) does not work when MB_CUR_MAX is 1. */ |
| if (strcmp (codeset, "UTF-8") == 0 && MB_CUR_MAX_L (uselocale (NULL)) <= 1) |
| codeset = "ASCII"; |
| #endif |
| |
| return codeset; |
| } |
