Commit d209e108 authored by Matthias Clasen's avatar Matthias Clasen Committed by Matthias Clasen

Add a function to return a list of applicable locale names. (#95587,

2004-09-07  Matthias Clasen  <mclasen@redhat.com>

	* glib/gutils.h:
	* glib/gutils.c (g_get_language_names): Add a function to
	return a list of applicable locale names.  (#95587,
	Hidetoshi Tajima)
	(guess_category_value, compute_locale_variants):
	(explode_locale, unalias_lang, read_aliases): Helper
	functions for g_get_language_names()

	* tests/testglib.c (main): Show the results of
	g_get_language_names()
parent 463ac347
2004-09-07 Matthias Clasen <mclasen@redhat.com>
* glib/gutils.h:
* glib/gutils.c (g_get_language_names): Add a function to
return a list of applicable locale names. (#95587,
Hidetoshi Tajima)
(guess_category_value, compute_locale_variants):
(explode_locale, unalias_lang, read_aliases): Helper
functions for g_get_language_names()
* tests/testglib.c (main): Show the results of
g_get_language_names()
Sun Sep 5 01:46:11 2004 Matthias Clasen <maclas@gmx.de>
* glib/glib.def:
......
2004-09-07 Matthias Clasen <mclasen@redhat.com>
* glib/gutils.h:
* glib/gutils.c (g_get_language_names): Add a function to
return a list of applicable locale names. (#95587,
Hidetoshi Tajima)
(guess_category_value, compute_locale_variants):
(explode_locale, unalias_lang, read_aliases): Helper
functions for g_get_language_names()
* tests/testglib.c (main): Show the results of
g_get_language_names()
Sun Sep 5 01:46:11 2004 Matthias Clasen <maclas@gmx.de>
* glib/glib.def:
......
2004-09-07 Matthias Clasen <mclasen@redhat.com>
* glib/gutils.h:
* glib/gutils.c (g_get_language_names): Add a function to
return a list of applicable locale names. (#95587,
Hidetoshi Tajima)
(guess_category_value, compute_locale_variants):
(explode_locale, unalias_lang, read_aliases): Helper
functions for g_get_language_names()
* tests/testglib.c (main): Show the results of
g_get_language_names()
Sun Sep 5 01:46:11 2004 Matthias Clasen <maclas@gmx.de>
* glib/glib.def:
......
2004-09-07 Matthias Clasen <mclasen@redhat.com>
* glib/gutils.h:
* glib/gutils.c (g_get_language_names): Add a function to
return a list of applicable locale names. (#95587,
Hidetoshi Tajima)
(guess_category_value, compute_locale_variants):
(explode_locale, unalias_lang, read_aliases): Helper
functions for g_get_language_names()
* tests/testglib.c (main): Show the results of
g_get_language_names()
Sun Sep 5 01:46:11 2004 Matthias Clasen <maclas@gmx.de>
* glib/glib.def:
......
2004-09-07 Matthias Clasen <mclasen@redhat.com>
* glib/gutils.h:
* glib/gutils.c (g_get_language_names): Add a function to
return a list of applicable locale names. (#95587,
Hidetoshi Tajima)
(guess_category_value, compute_locale_variants):
(explode_locale, unalias_lang, read_aliases): Helper
functions for g_get_language_names()
* tests/testglib.c (main): Show the results of
g_get_language_names()
Sun Sep 5 01:46:11 2004 Matthias Clasen <maclas@gmx.de>
* glib/glib.def:
......
2004-09-07 Matthias Clasen <mclasen@redhat.com>
* glib/glib-sections.txt: Add g_get_language_names().
Mon Sep 6 01:56:13 2004 Matthias Clasen <maclas@gmx.de>
* glib/tmpl/messages.sgml: Remove excess markup and fix a markup
......
......@@ -2096,5 +2096,6 @@ _
Q_
N_
g_strip_context
<SUBSECTION>
g_get_language_names
</SECTION>
......@@ -38,6 +38,7 @@
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <locale.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_PWD_H
......@@ -1520,6 +1521,296 @@ g_get_system_config_dirs (void)
return (G_CONST_RETURN gchar * G_CONST_RETURN *) conf_dir_vector;
}
static GHashTable *alias_table = NULL;
/* read an alias file for the locales */
static void
read_aliases (gchar *file)
{
FILE *fp;
char buf[256];
if (!alias_table)
alias_table = g_hash_table_new (g_str_hash, g_str_equal);
fp = fopen (file,"r");
if (!fp)
return;
while (fgets (buf, 256, fp))
{
char *p, *q;
g_strstrip (buf);
/* Line is a comment */
if ((buf[0] == '#') || (buf[0] == '\0'))
continue;
/* Reads first column */
for (p = buf, q = NULL; *p; p++) {
if ((*p == '\t') || (*p == ' ') || (*p == ':')) {
*p = '\0';
q = p+1;
while ((*q == '\t') || (*q == ' ')) {
q++;
}
break;
}
}
/* The line only had one column */
if (!q || *q == '\0')
continue;
/* Read second column */
for (p = q; *p; p++) {
if ((*p == '\t') || (*p == ' ')) {
*p = '\0';
break;
}
}
/* Add to alias table if necessary */
if (!g_hash_table_lookup (alias_table, buf)) {
g_hash_table_insert (alias_table, g_strdup (buf), g_strdup (q));
}
}
fclose (fp);
}
static char *
unalias_lang (char *lang)
{
char *p;
int i;
if (!alias_table)
read_aliases ("/usr/share/locale/locale.alias");
i = 0;
while ((p = g_hash_table_lookup (alias_table, lang)) && (strcmp (p, lang) != 0))
{
lang = p;
if (i++ == 30)
{
static gboolean said_before = FALSE;
if (!said_before)
g_warning ("Too many alias levels for a locale, "
"may indicate a loop");
said_before = TRUE;
return lang;
}
}
return lang;
}
/* Mask for components of locale spec. The ordering here is from
* least significant to most significant
*/
enum
{
COMPONENT_CODESET = 1 << 0,
COMPONENT_TERRITORY = 1 << 1,
COMPONENT_MODIFIER = 1 << 2
};
/* Break an X/Open style locale specification into components
*/
static guint
explode_locale (const gchar *locale,
gchar **language,
gchar **territory,
gchar **codeset,
gchar **modifier)
{
const gchar *uscore_pos;
const gchar *at_pos;
const gchar *dot_pos;
guint mask = 0;
uscore_pos = strchr (locale, '_');
dot_pos = strchr (uscore_pos ? uscore_pos : locale, '.');
at_pos = strchr (dot_pos ? dot_pos : (uscore_pos ? uscore_pos : locale), '@');
if (at_pos)
{
mask |= COMPONENT_MODIFIER;
*modifier = g_strdup (at_pos);
}
else
at_pos = locale + strlen (locale);
if (dot_pos)
{
mask |= COMPONENT_CODESET;
*codeset = g_strndup (dot_pos, at_pos - dot_pos);
}
else
dot_pos = at_pos;
if (uscore_pos)
{
mask |= COMPONENT_TERRITORY;
*territory = g_strndup (uscore_pos, dot_pos - uscore_pos);
}
else
uscore_pos = dot_pos;
*language = g_strndup (locale, uscore_pos - locale);
return mask;
}
/*
* Compute all interesting variants for a given locale name -
* by stripping off different components of the value.
*
* For simplicity, we assume that the locale is in
* X/Open format: language[_territory][.codeset][@modifier]
*
* TODO: Extend this to handle the CEN format (see the GNUlibc docs)
* as well. We could just copy the code from glibc wholesale
* but it is big, ugly, and complicated, so I'm reluctant
* to do so when this should handle 99% of the time...
*/
static GSList *
compute_locale_variants (const gchar *locale)
{
GSList *retval = NULL;
gchar *language;
gchar *territory;
gchar *codeset;
gchar *modifier;
guint mask;
guint i;
g_return_val_if_fail (locale != NULL, NULL);
mask = explode_locale (locale, &language, &territory, &codeset, &modifier);
/* Iterate through all possible combinations, from least attractive
* to most attractive.
*/
for (i = 0; i <= mask; i++)
if ((i & ~mask) == 0)
{
gchar *val = g_strconcat (language,
(i & COMPONENT_TERRITORY) ? territory : "",
(i & COMPONENT_CODESET) ? codeset : "",
(i & COMPONENT_MODIFIER) ? modifier : "",
NULL);
retval = g_slist_prepend (retval, val);
}
g_free (language);
if (mask & COMPONENT_CODESET)
g_free (codeset);
if (mask & COMPONENT_TERRITORY)
g_free (territory);
if (mask & COMPONENT_MODIFIER)
g_free (modifier);
return retval;
}
/* The following is (partly) taken from the gettext package.
Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. */
static const gchar *
guess_category_value (const gchar *category_name)
{
const gchar *retval;
/* The highest priority value is the `LANGUAGE' environment
variable. This is a GNU extension. */
retval = g_getenv ("LANGUAGE");
if ((retval != NULL) && (retval[0] != '\0'))
return retval;
/* `LANGUAGE' is not set. So we have to proceed with the POSIX
methods of looking to `LC_ALL', `LC_xxx', and `LANG'. On some
systems this can be done by the `setlocale' function itself. */
/* Setting of LC_ALL overwrites all other. */
retval = g_getenv ("LC_ALL");
if ((retval != NULL) && (retval[0] != '\0'))
return retval;
/* Next comes the name of the desired category. */
retval = g_getenv (category_name);
if ((retval != NULL) && (retval[0] != '\0'))
return retval;
/* Last possibility is the LANG environment variable. */
retval = g_getenv ("LANG");
if ((retval != NULL) && (retval[0] != '\0'))
return retval;
return NULL;
}
static gchar **languages = NULL;
/**
* g_get_language_names:
*
* Computes a list of applicable locale names, which can be used to
* e.g. construct locale-dependent filenames or search paths. The returned
* list is sorted from most desirable to least desirable and always contains
* the default locale "C".
*
* For example, if LANGUAGE=de:en_US, then the returned list is
* "de", "en_US", "en", "C".
*
* This function consults the environment variables <envar>LANGUAGE</envar>,
* <envar>LC_ALL</envar>, <envar>LC_MESSAGES</envar> and <envar>LANG</envar>
* to find the list of locales specified by the user.
*
* Return value: a %NULL-terminated array of strings owned by GLib
* that must not be modified or freed.
*
* Since: 2.6
**/
G_CONST_RETURN gchar * G_CONST_RETURN *
g_get_language_names ()
{
G_LOCK (g_utils_global);
if (!languages)
{
const gchar *value;
gchar **alist, **a;
GSList *list, *l;
gint i;
value = guess_category_value ("LC_MESSAGES");
if (!value)
value = "C";
alist = g_strsplit (value, ":", 0);
list = NULL;
for (a = alist; *a; a++)
{
gchar *b = unalias_lang (*a);
list = g_slist_concat (list, compute_locale_variants (b));
}
g_strfreev (alist);
list = g_slist_append (list, "C");
languages = g_new (gchar *, g_slist_length (list) + 1);
for (l = list, i = 0; l; l = l->next, i++)
languages[i] = l->data;
languages[i] = NULL;
g_slist_free (list);
}
G_UNLOCK (g_utils_global);
return (G_CONST_RETURN gchar * G_CONST_RETURN *) languages;
}
guint
g_direct_hash (gconstpointer v)
{
......
......@@ -128,6 +128,8 @@ G_CONST_RETURN gchar* g_get_user_cache_dir (void);
G_CONST_RETURN gchar * G_CONST_RETURN * g_get_system_data_dirs (void);
G_CONST_RETURN gchar * G_CONST_RETURN * g_get_system_config_dirs (void);
G_CONST_RETURN gchar * G_CONST_RETURN * g_get_language_names (void);
typedef struct _GDebugKey GDebugKey;
struct _GDebugKey
{
......
......@@ -451,6 +451,8 @@ main (int argc,
sv = (gchar **) g_get_system_config_dirs ();
g_print ("system_config: %s\n", s ? g_strjoinv (G_SEARCHPATH_SEPARATOR_S, sv) : "NULL!");
g_print ("tmp-dir: %s\n", g_get_tmp_dir ());
sv = (gchar **) g_get_language_names ();
g_print ("languages: %s\n", s ? g_strjoinv (":", sv) : "NULL!");
/* type sizes */
g_print ("checking size of gint8: %" G_GSIZE_FORMAT, sizeof (gint8));
......
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