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/* Return a reference to locale information record.
Copyright (C) 1996, 1997, 1999 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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 "localeinfo.h"
/* Constant data defined in setlocale.c. */
extern struct locale_data *const _nl_C[];
/* 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 == LC_ALL)
category_mask = (1 << __LC_LAST) - 1 - (1 << LC_ALL);
/* Sanity check for CATEGORY argument. */
if ((category_mask & ~((1 << LC_ALL) - 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)
{
if (base != NULL)
return base;
result = *base;
}
else
{
/* Fill with pointers to C locale data to . */
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL)
result.__locales[cnt] = _nl_C[cnt];
/* 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));
*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. */
locale_path = NULL;
locale_path_len = 0;
locpath_var = __secure_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_append (&locale_path, &locale_path_len,
LOCALE_PATH, sizeof (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;
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. */
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;
}
for (cnt = 0; cnt < __LC_LAST; ++cnt)
if (cnt != LC_ALL
&& (category_mask & 1 << cnt) != 0 && newnames[cnt] == locale)
/* The composite name did not specify the category 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)
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;
*result_ptr = result;
}
else
*(result_ptr = base) = 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);
result_ptr->__ctype_tolower = (const int *)
(ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOLOWER)].string);
result_ptr->__ctype_toupper = (const int *)
(ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOUPPER)].string);
}
return result_ptr;
}
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