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-rw-r--r--intl/localealias.c439
1 files changed, 439 insertions, 0 deletions
diff --git a/intl/localealias.c b/intl/localealias.c
new file mode 100644
index 0000000..910db53
--- /dev/null
+++ b/intl/localealias.c
@@ -0,0 +1,439 @@
+/* Handle aliases for locale names.
+ Copyright (C) 1995-1999, 2000-2001, 2003, 2005-2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ USA. */
+
+/* Tell glibc's <string.h> to provide a prototype for mempcpy().
+ This must come before <config.h> because <config.h> may include
+ <features.h>, and once <features.h> has been included, it's too late. */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <ctype.h>
+#include <stdio.h>
+#if defined _LIBC || defined HAVE___FSETLOCKING
+# include <stdio_ext.h>
+#endif
+#include <sys/types.h>
+
+#ifdef __GNUC__
+# undef alloca
+# define alloca __builtin_alloca
+# define HAVE_ALLOCA 1
+#else
+# ifdef _MSC_VER
+# include <malloc.h>
+# define alloca _alloca
+# else
+# if defined HAVE_ALLOCA_H || defined _LIBC
+# include <alloca.h>
+# else
+# ifdef _AIX
+ #pragma alloca
+# else
+# ifndef alloca
+char *alloca ();
+# endif
+# endif
+# endif
+# endif
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "gettextP.h"
+
+#if ENABLE_RELOCATABLE
+# include "relocatable.h"
+#else
+# define relocate(pathname) (pathname)
+#endif
+
+/* @@ end of prolog @@ */
+
+#ifdef _LIBC
+/* Rename the non ANSI C functions. This is required by the standard
+ because some ANSI C functions will require linking with this object
+ file and the name space must not be polluted. */
+# define strcasecmp __strcasecmp
+
+# ifndef mempcpy
+# define mempcpy __mempcpy
+# endif
+# define HAVE_MEMPCPY 1
+# define HAVE___FSETLOCKING 1
+#endif
+
+/* Handle multi-threaded applications. */
+#ifdef _LIBC
+# include <bits/libc-lock.h>
+#else
+# include "lock.h"
+#endif
+
+#ifndef internal_function
+# define internal_function
+#endif
+
+/* Some optimizations for glibc. */
+#ifdef _LIBC
+# define FEOF(fp) feof_unlocked (fp)
+# define FGETS(buf, n, fp) fgets_unlocked (buf, n, fp)
+#else
+# define FEOF(fp) feof (fp)
+# define FGETS(buf, n, fp) fgets (buf, n, fp)
+#endif
+
+/* For those losing systems which don't have `alloca' we have to add
+ some additional code emulating it. */
+#ifdef HAVE_ALLOCA
+# define freea(p) /* nothing */
+#else
+# define alloca(n) malloc (n)
+# define freea(p) free (p)
+#endif
+
+#if defined _LIBC_REENTRANT || HAVE_DECL_FGETS_UNLOCKED
+# undef fgets
+# define fgets(buf, len, s) fgets_unlocked (buf, len, s)
+#endif
+#if defined _LIBC_REENTRANT || HAVE_DECL_FEOF_UNLOCKED
+# undef feof
+# define feof(s) feof_unlocked (s)
+#endif
+
+
+__libc_lock_define_initialized (static, lock)
+
+
+struct alias_map
+{
+ const char *alias;
+ const char *value;
+};
+
+
+#ifndef _LIBC
+# define libc_freeres_ptr(decl) decl
+#endif
+
+libc_freeres_ptr (static char *string_space);
+static size_t string_space_act;
+static size_t string_space_max;
+libc_freeres_ptr (static struct alias_map *map);
+static size_t nmap;
+static size_t maxmap;
+
+
+/* Prototypes for local functions. */
+static size_t read_alias_file (const char *fname, int fname_len)
+ internal_function;
+static int extend_alias_table (void);
+static int alias_compare (const struct alias_map *map1,
+ const struct alias_map *map2);
+
+
+const char *
+_nl_expand_alias (const char *name)
+{
+ static const char *locale_alias_path;
+ struct alias_map *retval;
+ const char *result = NULL;
+ size_t added;
+
+ __libc_lock_lock (lock);
+
+ if (locale_alias_path == NULL)
+ locale_alias_path = LOCALE_ALIAS_PATH;
+
+ do
+ {
+ struct alias_map item;
+
+ item.alias = name;
+
+ if (nmap > 0)
+ retval = (struct alias_map *) bsearch (&item, map, nmap,
+ sizeof (struct alias_map),
+ (int (*) (const void *,
+ const void *)
+ ) alias_compare);
+ else
+ retval = NULL;
+
+ /* We really found an alias. Return the value. */
+ if (retval != NULL)
+ {
+ result = retval->value;
+ break;
+ }
+
+ /* Perhaps we can find another alias file. */
+ added = 0;
+ while (added == 0 && locale_alias_path[0] != '\0')
+ {
+ const char *start;
+
+ while (locale_alias_path[0] == PATH_SEPARATOR)
+ ++locale_alias_path;
+ start = locale_alias_path;
+
+ while (locale_alias_path[0] != '\0'
+ && locale_alias_path[0] != PATH_SEPARATOR)
+ ++locale_alias_path;
+
+ if (start < locale_alias_path)
+ added = read_alias_file (start, locale_alias_path - start);
+ }
+ }
+ while (added != 0);
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
+
+static size_t
+internal_function
+read_alias_file (const char *fname, int fname_len)
+{
+ FILE *fp;
+ char *full_fname;
+ size_t added;
+ static const char aliasfile[] = "/locale.alias";
+
+ full_fname = (char *) alloca (fname_len + sizeof aliasfile);
+#ifdef HAVE_MEMPCPY
+ mempcpy (mempcpy (full_fname, fname, fname_len),
+ aliasfile, sizeof aliasfile);
+#else
+ memcpy (full_fname, fname, fname_len);
+ memcpy (&full_fname[fname_len], aliasfile, sizeof aliasfile);
+#endif
+
+#ifdef _LIBC
+ /* Note the file is opened with cancellation in the I/O functions
+ disabled. */
+ fp = fopen (relocate (full_fname), "rc");
+#else
+ fp = fopen (relocate (full_fname), "r");
+#endif
+ freea (full_fname);
+ if (fp == NULL)
+ return 0;
+
+#ifdef HAVE___FSETLOCKING
+ /* No threads present. */
+ __fsetlocking (fp, FSETLOCKING_BYCALLER);
+#endif
+
+ added = 0;
+ while (!FEOF (fp))
+ {
+ /* It is a reasonable approach to use a fix buffer here because
+ a) we are only interested in the first two fields
+ b) these fields must be usable as file names and so must not
+ be that long
+ We avoid a multi-kilobyte buffer here since this would use up
+ stack space which we might not have if the program ran out of
+ memory. */
+ char buf[400];
+ char *alias;
+ char *value;
+ char *cp;
+ int complete_line;
+
+ if (FGETS (buf, sizeof buf, fp) == NULL)
+ /* EOF reached. */
+ break;
+
+ /* Determine whether the line is complete. */
+ complete_line = strchr (buf, '\n') != NULL;
+
+ cp = buf;
+ /* Ignore leading white space. */
+ while (isspace ((unsigned char) cp[0]))
+ ++cp;
+
+ /* A leading '#' signals a comment line. */
+ if (cp[0] != '\0' && cp[0] != '#')
+ {
+ alias = cp++;
+ while (cp[0] != '\0' && !isspace ((unsigned char) cp[0]))
+ ++cp;
+ /* Terminate alias name. */
+ if (cp[0] != '\0')
+ *cp++ = '\0';
+
+ /* Now look for the beginning of the value. */
+ while (isspace ((unsigned char) cp[0]))
+ ++cp;
+
+ if (cp[0] != '\0')
+ {
+ value = cp++;
+ while (cp[0] != '\0' && !isspace ((unsigned char) cp[0]))
+ ++cp;
+ /* Terminate value. */
+ if (cp[0] == '\n')
+ {
+ /* This has to be done to make the following test
+ for the end of line possible. We are looking for
+ the terminating '\n' which do not overwrite here. */
+ *cp++ = '\0';
+ *cp = '\n';
+ }
+ else if (cp[0] != '\0')
+ *cp++ = '\0';
+
+#ifdef IN_LIBGLOCALE
+ /* glibc's locale.alias contains entries for ja_JP and ko_KR
+ that make it impossible to use a Japanese or Korean UTF-8
+ locale under the name "ja_JP" or "ko_KR". Ignore these
+ entries. */
+ if (strchr (alias, '_') == NULL)
+#endif
+ {
+ size_t alias_len;
+ size_t value_len;
+
+ if (nmap >= maxmap)
+ if (__builtin_expect (extend_alias_table (), 0))
+ goto out;
+
+ alias_len = strlen (alias) + 1;
+ value_len = strlen (value) + 1;
+
+ if (string_space_act + alias_len + value_len > string_space_max)
+ {
+ /* Increase size of memory pool. */
+ size_t new_size = (string_space_max
+ + (alias_len + value_len > 1024
+ ? alias_len + value_len : 1024));
+ char *new_pool = (char *) realloc (string_space, new_size);
+ if (new_pool == NULL)
+ goto out;
+
+ if (__builtin_expect (string_space != new_pool, 0))
+ {
+ size_t i;
+
+ for (i = 0; i < nmap; i++)
+ {
+ map[i].alias += new_pool - string_space;
+ map[i].value += new_pool - string_space;
+ }
+ }
+
+ string_space = new_pool;
+ string_space_max = new_size;
+ }
+
+ map[nmap].alias =
+ (const char *) memcpy (&string_space[string_space_act],
+ alias, alias_len);
+ string_space_act += alias_len;
+
+ map[nmap].value =
+ (const char *) memcpy (&string_space[string_space_act],
+ value, value_len);
+ string_space_act += value_len;
+
+ ++nmap;
+ ++added;
+ }
+ }
+ }
+
+ /* Possibly not the whole line fits into the buffer. Ignore
+ the rest of the line. */
+ if (! complete_line)
+ do
+ if (FGETS (buf, sizeof buf, fp) == NULL)
+ /* Make sure the inner loop will be left. The outer loop
+ will exit at the `feof' test. */
+ break;
+ while (strchr (buf, '\n') == NULL);
+ }
+
+ out:
+ /* Should we test for ferror()? I think we have to silently ignore
+ errors. --drepper */
+ fclose (fp);
+
+ if (added > 0)
+ qsort (map, nmap, sizeof (struct alias_map),
+ (int (*) (const void *, const void *)) alias_compare);
+
+ return added;
+}
+
+
+static int
+extend_alias_table ()
+{
+ size_t new_size;
+ struct alias_map *new_map;
+
+ new_size = maxmap == 0 ? 100 : 2 * maxmap;
+ new_map = (struct alias_map *) realloc (map, (new_size
+ * sizeof (struct alias_map)));
+ if (new_map == NULL)
+ /* Simply don't extend: we don't have any more core. */
+ return -1;
+
+ map = new_map;
+ maxmap = new_size;
+ return 0;
+}
+
+
+static int
+alias_compare (const struct alias_map *map1, const struct alias_map *map2)
+{
+#if defined _LIBC || defined HAVE_STRCASECMP
+ return strcasecmp (map1->alias, map2->alias);
+#else
+ const unsigned char *p1 = (const unsigned char *) map1->alias;
+ const unsigned char *p2 = (const unsigned char *) map2->alias;
+ unsigned char c1, c2;
+
+ if (p1 == p2)
+ return 0;
+
+ do
+ {
+ /* I know this seems to be odd but the tolower() function in
+ some systems libc cannot handle nonalpha characters. */
+ c1 = isupper (*p1) ? tolower (*p1) : *p1;
+ c2 = isupper (*p2) ? tolower (*p2) : *p2;
+ if (c1 == '\0')
+ break;
+ ++p1;
+ ++p2;
+ }
+ while (c1 == c2);
+
+ return c1 - c2;
+#endif
+}