diff options
Diffstat (limited to 'intl/localcharset.c')
| -rw-r--r-- | intl/localcharset.c | 398 |
1 files changed, 0 insertions, 398 deletions
diff --git a/intl/localcharset.c b/intl/localcharset.c deleted file mode 100644 index d04d053..0000000 --- a/intl/localcharset.c +++ /dev/null @@ -1,398 +0,0 @@ -/* Determine a canonical name for the current locale's character encoding. - - Copyright (C) 2000-2003 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify it - under the terms of the GNU Library General Public License as published - by the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, - USA. */ - -/* Written by Bruno Haible <bruno@clisp.org>. */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -/* Specification. */ -#include "localcharset.h" - -#if HAVE_STDDEF_H -# include <stddef.h> -#endif - -#include <stdio.h> -#if HAVE_STRING_H -# include <string.h> -#else -# include <strings.h> -#endif -#if HAVE_STDLIB_H -# include <stdlib.h> -#endif - -#if defined _WIN32 || defined __WIN32__ -# undef WIN32 /* avoid warning on mingw32 */ -# define WIN32 -#endif - -#if defined __EMX__ -/* Assume EMX program runs on OS/2, even if compiled under DOS. */ -# define OS2 -#endif - -#if !defined WIN32 -# if HAVE_LANGINFO_CODESET -# include <langinfo.h> -# else -# if HAVE_SETLOCALE -# include <locale.h> -# endif -# endif -#elif defined WIN32 -# define WIN32_LEAN_AND_MEAN -# include <windows.h> -#endif -#if defined OS2 -# define INCL_DOS -# include <os2.h> -#endif - -#if ENABLE_RELOCATABLE -# include "relocatable.h" -#else -# define relocate(pathname) (pathname) -#endif - -#if defined _WIN32 || defined __WIN32__ || defined __EMX__ || defined __DJGPP__ - /* Win32, OS/2, DOS */ -# define ISSLASH(C) ((C) == '/' || (C) == '\\') -#endif - -#ifndef DIRECTORY_SEPARATOR -# define DIRECTORY_SEPARATOR '/' -#endif - -#ifndef ISSLASH -# define ISSLASH(C) ((C) == DIRECTORY_SEPARATOR) -#endif - -#ifdef HAVE_GETC_UNLOCKED -# undef getc -# define getc getc_unlocked -#endif - -/* The following static variable is declared 'volatile' to avoid a - possible multithread problem in the function get_charset_aliases. If we - are running in a threaded environment, and if two threads initialize - 'charset_aliases' simultaneously, both will produce the same value, - and everything will be ok if the two assignments to 'charset_aliases' - are atomic. But I don't know what will happen if the two assignments mix. */ -#if __STDC__ != 1 -# define volatile /* empty */ -#endif -/* Pointer to the contents of the charset.alias file, if it has already been - read, else NULL. Its format is: - ALIAS_1 '\0' CANONICAL_1 '\0' ... ALIAS_n '\0' CANONICAL_n '\0' '\0' */ -static const char * volatile charset_aliases; - -/* Return a pointer to the contents of the charset.alias file. */ -static const char * -get_charset_aliases () -{ - const char *cp; - - cp = charset_aliases; - if (cp == NULL) - { -#if !(defined VMS || defined WIN32) - FILE *fp; - const char *dir = relocate (LIBDIR); - const char *base = "charset.alias"; - char *file_name; - - /* Concatenate dir and base into freshly allocated file_name. */ - { - size_t dir_len = strlen (dir); - size_t base_len = strlen (base); - int add_slash = (dir_len > 0 && !ISSLASH (dir[dir_len - 1])); - file_name = (char *) malloc (dir_len + add_slash + base_len + 1); - if (file_name != NULL) - { - memcpy (file_name, dir, dir_len); - if (add_slash) - file_name[dir_len] = DIRECTORY_SEPARATOR; - memcpy (file_name + dir_len + add_slash, base, base_len + 1); - } - } - - if (file_name == NULL || (fp = fopen (file_name, "r")) == NULL) - /* Out of memory or file not found, treat it as empty. */ - cp = ""; - else - { - /* Parse the file's contents. */ - int c; - char buf1[50+1]; - char buf2[50+1]; - char *res_ptr = NULL; - size_t res_size = 0; - size_t l1, l2; - - for (;;) - { - c = getc (fp); - if (c == EOF) - break; - if (c == '\n' || c == ' ' || c == '\t') - continue; - if (c == '#') - { - /* Skip comment, to end of line. */ - do - c = getc (fp); - while (!(c == EOF || c == '\n')); - if (c == EOF) - break; - continue; - } - ungetc (c, fp); - if (fscanf (fp, "%50s %50s", buf1, buf2) < 2) - break; - l1 = strlen (buf1); - l2 = strlen (buf2); - if (res_size == 0) - { - res_size = l1 + 1 + l2 + 1; - res_ptr = (char *) malloc (res_size + 1); - } - else - { - res_size += l1 + 1 + l2 + 1; - res_ptr = (char *) realloc (res_ptr, res_size + 1); - } - if (res_ptr == NULL) - { - /* Out of memory. */ - res_size = 0; - break; - } - strcpy (res_ptr + res_size - (l2 + 1) - (l1 + 1), buf1); - strcpy (res_ptr + res_size - (l2 + 1), buf2); - } - fclose (fp); - if (res_size == 0) - cp = ""; - else - { - *(res_ptr + res_size) = '\0'; - cp = res_ptr; - } - } - - if (file_name != NULL) - free (file_name); - -#else - -# if defined VMS - /* To avoid the troubles of an extra file charset.alias_vms in the - sources of many GNU packages, simply inline the aliases here. */ - /* 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". */ - cp = "ISO8859-1" "\0" "ISO-8859-1" "\0" - "ISO8859-2" "\0" "ISO-8859-2" "\0" - "ISO8859-5" "\0" "ISO-8859-5" "\0" - "ISO8859-7" "\0" "ISO-8859-7" "\0" - "ISO8859-8" "\0" "ISO-8859-8" "\0" - "ISO8859-9" "\0" "ISO-8859-9" "\0" - /* Japanese */ - "eucJP" "\0" "EUC-JP" "\0" - "SJIS" "\0" "SHIFT_JIS" "\0" - "DECKANJI" "\0" "DEC-KANJI" "\0" - "SDECKANJI" "\0" "EUC-JP" "\0" - /* Chinese */ - "eucTW" "\0" "EUC-TW" "\0" - "DECHANYU" "\0" "DEC-HANYU" "\0" - "DECHANZI" "\0" "GB2312" "\0" - /* Korean */ - "DECKOREAN" "\0" "EUC-KR" "\0"; -# endif - -# if defined WIN32 - /* To avoid the troubles of installing a separate file in the same - directory as the DLL and of retrieving the DLL's directory at - runtime, simply inline the aliases here. */ - - cp = "CP936" "\0" "GBK" "\0" - "CP1361" "\0" "JOHAB" "\0" - "CP20127" "\0" "ASCII" "\0" - "CP20866" "\0" "KOI8-R" "\0" - "CP21866" "\0" "KOI8-RU" "\0" - "CP28591" "\0" "ISO-8859-1" "\0" - "CP28592" "\0" "ISO-8859-2" "\0" - "CP28593" "\0" "ISO-8859-3" "\0" - "CP28594" "\0" "ISO-8859-4" "\0" - "CP28595" "\0" "ISO-8859-5" "\0" - "CP28596" "\0" "ISO-8859-6" "\0" - "CP28597" "\0" "ISO-8859-7" "\0" - "CP28598" "\0" "ISO-8859-8" "\0" - "CP28599" "\0" "ISO-8859-9" "\0" - "CP28605" "\0" "ISO-8859-15" "\0"; -# endif -#endif - - charset_aliases = cp; - } - - return cp; -} - -/* Determine the current locale's character encoding, and canonicalize it - into one of the canonical names listed in config.charset. - The result must not be freed; it is statically allocated. - If the canonical name cannot be determined, the result is a non-canonical - name. */ - -#ifdef STATIC -STATIC -#endif -const char * -locale_charset () -{ - const char *codeset; - const char *aliases; - -#if !(defined WIN32 || defined OS2) - -# if HAVE_LANGINFO_CODESET - - /* Most systems support nl_langinfo (CODESET) nowadays. */ - codeset = nl_langinfo (CODESET); - -# 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 SunOS 4 or 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 HAVE_SETLOCALE && 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"); - } - } - - /* On some old systems, one used to set locale = "iso8859_1". On others, - you set it to "language_COUNTRY.charset". In any case, we resolve it - through the charset.alias file. */ - codeset = locale; - -# endif - -#elif defined WIN32 - - static char buf[2 + 10 + 1]; - - /* Woe32 has a function returning the locale's codepage as a number. */ - sprintf (buf, "CP%u", GetACP ()); - codeset = buf; - -#elif defined OS2 - - const char *locale; - static char buf[2 + 10 + 1]; - ULONG cp[3]; - ULONG cplen; - - /* 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 (buf)) - { - memcpy (buf, dot, modifier - dot); - buf [modifier - dot] = '\0'; - return buf; - } - } - - /* Resolve through the charset.alias file. */ - codeset = locale; - } - else - { - /* OS/2 has a function returning the locale's codepage as a number. */ - if (DosQueryCp (sizeof (cp), cp, &cplen)) - codeset = ""; - else - { - sprintf (buf, "CP%u", cp[0]); - codeset = buf; - } - } - -#endif - - if (codeset == NULL) - /* The canonical name cannot be determined. */ - codeset = ""; - - /* Resolve alias. */ - for (aliases = get_charset_aliases (); - *aliases != '\0'; - aliases += strlen (aliases) + 1, aliases += strlen (aliases) + 1) - if (strcmp (codeset, aliases) == 0 - || (aliases[0] == '*' && aliases[1] == '\0')) - { - codeset = aliases + strlen (aliases) + 1; - break; - } - - /* 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"; - - return codeset; -} |