X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Flocalcharset.c;h=bfd9a039c133546d035371d32ca4c852f0da9326;hb=23eecb48e39afd0d267d64d40ba6bf97aa865e13;hp=575372dca4472404c5f0c7a76ba0ced72fe9c184;hpb=4028e63dd21b964fdcd76448c973cbad683982e4;p=gnulib.git
diff --git a/lib/localcharset.c b/lib/localcharset.c
index 575372dca..bfd9a039c 100644
--- a/lib/localcharset.c
+++ b/lib/localcharset.c
@@ -1,59 +1,95 @@
/* Determine a canonical name for the current locale's character encoding.
- Copyright (C) 2000-2001 Free Software Foundation, Inc.
+ Copyright (C) 2000-2006, 2008-2013 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)
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU 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. */
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, see . */
-/* Written by Bruno Haible . */
+/* Written by Bruno Haible . */
-#ifdef HAVE_CONFIG_H
-# include
-#endif
+#include
-#if HAVE_STDDEF_H
-# include
-#endif
+/* Specification. */
+#include "localcharset.h"
+#include
+#include
#include
-#if HAVE_STRING_H
-# include
-#else
-# include
-#endif
-#if HAVE_STDLIB_H
-# include
+#include
+#include
+
+#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 __WIN32__
-# undef WIN32 /* avoid warning on mingw32 */
-# define WIN32
+# define WINDOWS_NATIVE
+#endif
+
+#if defined __EMX__
+/* Assume EMX program runs on OS/2, even if compiled under DOS. */
+# ifndef OS2
+# define OS2
+# endif
#endif
-#ifndef WIN32
+#if !defined WINDOWS_NATIVE
+# include
# if HAVE_LANGINFO_CODESET
# include
# else
-# if HAVE_SETLOCALE
+# if 0 /* see comment below */
# include
# endif
# endif
-#else /* WIN32 */
+# ifdef __CYGWIN__
+# define WIN32_LEAN_AND_MEAN
+# include
+# endif
+#elif defined WINDOWS_NATIVE
# define WIN32_LEAN_AND_MEAN
# include
#endif
+#if defined OS2
+# define INCL_DOS
+# include
+#endif
+
+/* For MB_CUR_MAX_L */
+#if defined DARWIN7
+# include
+#endif
+
+#if ENABLE_RELOCATABLE
+# include "relocatable.h"
+#else
+# define relocate(pathname) (pathname)
+#endif
+
+/* Get LIBDIR. */
+#ifndef LIBDIR
+# include "configmake.h"
+#endif
+
+/* Define O_NOFOLLOW to 0 on platforms where it does not exist. */
+#ifndef O_NOFOLLOW
+# define O_NOFOLLOW 0
+#endif
+
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
+ /* Native Windows, Cygwin, OS/2, DOS */
+# define ISSLASH(C) ((C) == '/' || (C) == '\\')
+#endif
#ifndef DIRECTORY_SEPARATOR
# define DIRECTORY_SEPARATOR '/'
@@ -63,122 +99,248 @@
# define ISSLASH(C) ((C) == DIRECTORY_SEPARATOR)
#endif
+#if HAVE_DECL_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 char * volatile charset_aliases;
+static const char * volatile charset_aliases;
/* Return a pointer to the contents of the charset.alias file. */
static const char *
-get_charset_aliases ()
+get_charset_aliases (void)
{
- char *cp;
+ const char *cp;
cp = charset_aliases;
if (cp == NULL)
{
-#ifndef WIN32
- FILE *fp;
- const char *dir = LIBDIR;
+#if !(defined DARWIN7 || defined VMS || defined WINDOWS_NATIVE || defined __CYGWIN__)
+ const char *dir;
const char *base = "charset.alias";
char *file_name;
+ /* Make it possible to override the charset.alias location. This is
+ necessary for running the testsuite before "make install". */
+ dir = getenv ("CHARSETALIASDIR");
+ if (dir == NULL || dir[0] == '\0')
+ dir = relocate (LIBDIR);
+
/* 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);
- }
+ 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 = "";
+ if (file_name == NULL)
+ /* Out of memory. Treat the file 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 = malloc (res_size + 1);
- }
- else
- {
- res_size += l1 + 1 + l2 + 1;
- res_ptr = 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 /* WIN32 */
+ {
+ int fd;
+
+ /* Open the file. Reject symbolic links on platforms that support
+ O_NOFOLLOW. This is a security feature. Without it, an attacker
+ could retrieve parts of the contents (namely, the tail of the
+ first line that starts with "* ") of an arbitrary file by placing
+ a symbolic link to that file under the name "charset.alias" in
+ some writable directory and defining the environment variable
+ CHARSETALIASDIR to point to that directory. */
+ fd = open (file_name,
+ O_RDONLY | (HAVE_WORKING_O_NOFOLLOW ? O_NOFOLLOW : 0));
+ if (fd < 0)
+ /* File not found. Treat it as empty. */
+ cp = "";
+ else
+ {
+ FILE *fp;
+
+ fp = fdopen (fd, "r");
+ if (fp == NULL)
+ {
+ /* Out of memory. Treat the file as empty. */
+ close (fd);
+ cp = "";
+ }
+ else
+ {
+ /* Parse the file's contents. */
+ char *res_ptr = NULL;
+ size_t res_size = 0;
+
+ for (;;)
+ {
+ int c;
+ char buf1[50+1];
+ char buf2[50+1];
+ size_t l1, l2;
+ char *old_res_ptr;
+
+ 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);
+ old_res_ptr = res_ptr;
+ 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;
+ free (old_res_ptr);
+ 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;
+ }
+ }
+ }
+
+ free (file_name);
+ }
+
+#else
+# if defined DARWIN7
+ /* To avoid the trouble of installing a file that is shared by many
+ GNU packages -- many packaging systems have problems with this --,
+ simply inline the aliases here. */
+ cp = "ISO8859-1" "\0" "ISO-8859-1" "\0"
+ "ISO8859-2" "\0" "ISO-8859-2" "\0"
+ "ISO8859-4" "\0" "ISO-8859-4" "\0"
+ "ISO8859-5" "\0" "ISO-8859-5" "\0"
+ "ISO8859-7" "\0" "ISO-8859-7" "\0"
+ "ISO8859-9" "\0" "ISO-8859-9" "\0"
+ "ISO8859-13" "\0" "ISO-8859-13" "\0"
+ "ISO8859-15" "\0" "ISO-8859-15" "\0"
+ "KOI8-R" "\0" "KOI8-R" "\0"
+ "KOI8-U" "\0" "KOI8-U" "\0"
+ "CP866" "\0" "CP866" "\0"
+ "CP949" "\0" "CP949" "\0"
+ "CP1131" "\0" "CP1131" "\0"
+ "CP1251" "\0" "CP1251" "\0"
+ "eucCN" "\0" "GB2312" "\0"
+ "GB2312" "\0" "GB2312" "\0"
+ "eucJP" "\0" "EUC-JP" "\0"
+ "eucKR" "\0" "EUC-KR" "\0"
+ "Big5" "\0" "BIG5" "\0"
+ "Big5HKSCS" "\0" "BIG5-HKSCS" "\0"
+ "GBK" "\0" "GBK" "\0"
+ "GB18030" "\0" "GB18030" "\0"
+ "SJIS" "\0" "SHIFT_JIS" "\0"
+ "ARMSCII-8" "\0" "ARMSCII-8" "\0"
+ "PT154" "\0" "PT154" "\0"
+ /*"ISCII-DEV" "\0" "?" "\0"*/
+ "*" "\0" "UTF-8" "\0";
+# endif
+
+# 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 WINDOWS_NATIVE || defined __CYGWIN__
/* 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. */
+ 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";
+ "CP1361" "\0" "JOHAB" "\0"
+ "CP20127" "\0" "ASCII" "\0"
+ "CP20866" "\0" "KOI8-R" "\0"
+ "CP20936" "\0" "GB2312" "\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"
+ "CP38598" "\0" "ISO-8859-8" "\0"
+ "CP51932" "\0" "EUC-JP" "\0"
+ "CP51936" "\0" "GB2312" "\0"
+ "CP51949" "\0" "EUC-KR" "\0"
+ "CP51950" "\0" "EUC-TW" "\0"
+ "CP54936" "\0" "GB18030" "\0"
+ "CP65001" "\0" "UTF-8" "\0";
+# endif
#endif
charset_aliases = cp;
@@ -197,18 +359,74 @@ get_charset_aliases ()
STATIC
#endif
const char *
-locale_charset ()
+locale_charset (void)
{
const char *codeset;
const char *aliases;
-#ifndef WIN32
+#if !(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 buf[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 (buf))
+ {
+ memcpy (buf, dot, modifier - dot);
+ buf [modifier - dot] = '\0';
+ return buf;
+ }
+ }
+ }
+
+ /* 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. */
+ sprintf (buf, "CP%u", GetACP ());
+ codeset = buf;
+ }
+# endif
+
# else
/* On old systems which lack it, use setlocale or getenv. */
@@ -218,18 +436,18 @@ locale_charset ()
(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
+# 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");
- }
+ {
+ 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,
@@ -239,14 +457,73 @@ locale_charset ()
# endif
-#else /* WIN32 */
+#elif defined WINDOWS_NATIVE
static char buf[2 + 10 + 1];
- /* Win32 has a function returning the locale's codepage as a number. */
+ /* 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 ());
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)
@@ -258,11 +535,24 @@ locale_charset ()
*aliases != '\0';
aliases += strlen (aliases) + 1, aliases += strlen (aliases) + 1)
if (strcmp (codeset, aliases) == 0
- || (aliases[0] == '*' && aliases[1] == '\0'))
+ || (aliases[0] == '*' && aliases[1] == '\0'))
{
- codeset = aliases + strlen (aliases) + 1;
- break;
+ 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";
+
+#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;
}