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/* Return a reference to locale information record.
Copyright (C) 1996,1997,1999,2000,2001,2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <argz.h>
#include <errno.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include "localeinfo.h"
/* Use this when we come along an error. */
#define ERROR_RETURN \
do { \
__set_errno (EINVAL); \
return NULL; \
} while (0)
__locale_t
__newlocale (int category_mask, const char *locale, __locale_t base)
{
/* Intermediate memory for result. */
const char *newnames[__LC_LAST];
struct __locale_struct result;
__locale_t result_ptr;
char *locale_path;
size_t locale_path_len;
const char *locpath_var;
int cnt;
/* We treat LC_ALL in the same way as if all bits were set. */
if (category_mask == 1 << LC_ALL)
category_mask = (1 << __LC_LAST) - 1 - (1 << LC_ALL);
/* Sanity check for CATEGORY argument. */
if ((category_mask & ~((1 << __LC_LAST) - 1 - (1 << LC_ALL))) != 0)
ERROR_RETURN;
/* `newlocale' does not support asking for the locale name. */
if (locale == NULL)
ERROR_RETURN;
/* Allocate memory for the result. */
if (base != NULL)
result = *base;
else
/* Fill with pointers to C locale data. */
result = _nl_C_locobj;
/* If no category is to be set we return BASE if available or a
dataset using the C locale data. */
if (category_mask == 0)
{
result_ptr = (__locale_t) malloc (sizeof (struct __locale_struct));
if (result_ptr == NULL)
return NULL;
*result_ptr = result;
goto update;
}
/* We perhaps really have to load some data. So we determine the
path in which to look for the data now. The environment variable
`LOCPATH' must only be used when the binary has no SUID or SGID
bit set. If using the default path, we tell _nl_find_locale
by passing null and it can check the canonical locale archive. */
locale_path = NULL;
locale_path_len = 0;
locpath_var = getenv ("LOCPATH");
if (locpath_var != NULL && locpath_var[0] != '\0')
{
if (__argz_create_sep (locpath_var, ':',
&locale_path, &locale_path_len) != 0)
return NULL;
if (__argz_add_sep (&locale_path, &locale_path_len,
_nl_default_locale_path, ':') != 0)
return NULL;
}
/* Get the names for the locales we are interested in. We either
allow a composite name or a single name. */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL)
newnames[cnt] = locale;
if (strchr (locale, ';') != NULL)
{
/* This is a composite name. Make a copy and split it up. */
char *np = strdupa (locale);
char *cp;
int specified_mask = 0;
while ((cp = strchr (np, '=')) != NULL)
{
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL
&& (size_t) (cp - np) == _nl_category_name_sizes[cnt]
&& memcmp (np, _nl_category_names[cnt], cp - np) == 0)
break;
if (cnt == __LC_LAST)
/* Bogus category name. */
ERROR_RETURN;
/* Found the category this clause sets. */
specified_mask |= 1 << cnt;
newnames[cnt] = ++cp;
cp = strchr (cp, ';');
if (cp != NULL)
{
/* Examine the next clause. */
*cp = '\0';
np = cp + 1;
}
else
/* This was the last clause. We are done. */
break;
}
if (category_mask &~ specified_mask)
/* The composite name did not specify all categories we need. */
ERROR_RETURN;
}
/* Now process all categories we are interested in. */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL && (category_mask & 1 << cnt) != 0)
{
result.__locales[cnt] = _nl_find_locale (locale_path, locale_path_len,
cnt, &newnames[cnt]);
if (result.__locales[cnt] == NULL)
{
while (cnt-- > 0)
if (result.__locales[cnt]->usage_count != UNDELETABLE)
/* We can remove the data. */
_nl_remove_locale (cnt, result.__locales[cnt]);
return NULL;
}
}
/* We successfully loaded all required data. */
if (base == NULL)
{
/* Allocate new structure. */
result_ptr = (__locale_t) malloc (sizeof (struct __locale_struct));
if (result_ptr == NULL)
return NULL;
/* Install strdup'd names in the new structure's __names array. */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL && result.__names[cnt] != _nl_C_name)
{
result.__names[cnt] = __strdup (((category_mask & 1 << cnt) != 0)
? newnames[cnt]
: result.__names[cnt]);
if (result.__names[cnt] == NULL)
{
while (cnt-- > 0)
if (result.__names[cnt] != _nl_C_name)
free ((char *) result.__names[cnt]);
free (result_ptr);
return NULL;
}
}
}
else
{
/* We modify the base structure.
First strdup the names we were given for the new locale. */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL && ((category_mask & 1 << cnt) != 0)
&& result.__names[cnt] != _nl_C_name)
{
newnames[cnt] = __strdup (newnames[cnt]);
if (newnames[cnt] == NULL)
{
while (cnt-- > 0)
if (newnames[cnt] != NULL)
free ((char *) newnames[cnt]);
return NULL;
}
}
else
newnames[cnt] = NULL;
/* Now that we can't lose, install the new names. */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (newnames[cnt] != NULL)
{
if (result.__names[cnt] != _nl_C_name)
free ((char *) result.__names[cnt]);
result.__names[cnt] = __strdup (newnames[cnt]);
}
result_ptr = base;
}
*result_ptr = result;
/* Update the special members. */
update:
{
union locale_data_value *ctypes = result_ptr->__locales[LC_CTYPE]->values;
result_ptr->__ctype_b = (const unsigned short int *)
ctypes[_NL_ITEM_INDEX (_NL_CTYPE_CLASS)].string + 128;
result_ptr->__ctype_tolower = (const int *)
ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOLOWER)].string + 128;
result_ptr->__ctype_toupper = (const int *)
ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOUPPER)].string + 128;
}
return result_ptr;
}
weak_alias (__newlocale, newlocale)
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