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/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.org>.
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, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <locale.h>
#include <nl_types.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include "catgetsinfo.h"
/* Open the catalog and return a descriptor for the catalog. */
nl_catd
catopen (const char *cat_name, int flag)
{
__nl_catd result;
const char *env_var = NULL;
const char *nlspath = NULL;
char *tmp = NULL;
if (strchr (cat_name, '/') == NULL)
{
if (flag == NL_CAT_LOCALE)
/* Use the current locale setting for LC_MESSAGES. */
env_var = setlocale (LC_MESSAGES, NULL);
else
/* Use the LANG environment variable. */
env_var = getenv ("LANG");
if (env_var == NULL || *env_var == '\0'
|| (__libc_enable_secure && strchr (env_var, '/') != NULL))
env_var = "C";
nlspath = getenv ("NLSPATH");
if (nlspath != NULL && *nlspath != '\0')
{
/* Append the system dependent directory. */
size_t len = strlen (nlspath) + 1 + sizeof NLSPATH;
tmp = malloc (len);
if (__glibc_unlikely (tmp == NULL))
return (nl_catd) -1;
__stpcpy (__stpcpy (__stpcpy (tmp, nlspath), ":"), NLSPATH);
nlspath = tmp;
}
else
nlspath = NLSPATH;
}
result = (__nl_catd) malloc (sizeof (*result));
if (result == NULL)
{
/* We cannot get enough memory. */
result = (nl_catd) -1;
}
else if (__open_catalog (cat_name, nlspath, env_var, result) != 0)
{
/* Couldn't open the file. */
free ((void *) result);
result = (nl_catd) -1;
}
free (tmp);
return (nl_catd) result;
}
/* Return message from message catalog. */
char *
catgets (nl_catd catalog_desc, int set, int message, const char *string)
{
__nl_catd catalog;
size_t idx;
size_t cnt;
/* Be generous if catalog which failed to be open is used. */
if (catalog_desc == (nl_catd) -1 || ++set <= 0 || message < 0)
return (char *) string;
catalog = (__nl_catd) catalog_desc;
idx = ((set * message) % catalog->plane_size) * 3;
cnt = 0;
do
{
if (catalog->name_ptr[idx + 0] == (u_int32_t) set
&& catalog->name_ptr[idx + 1] == (u_int32_t) message)
return (char *) &catalog->strings[catalog->name_ptr[idx + 2]];
idx += catalog->plane_size * 3;
}
while (++cnt < catalog->plane_depth);
__set_errno (ENOMSG);
return (char *) string;
}
/* Return resources used for loaded message catalog. */
int
catclose (nl_catd catalog_desc)
{
__nl_catd catalog;
/* Be generous if catalog which failed to be open is used. */
if (catalog_desc == (nl_catd) -1)
{
__set_errno (EBADF);
return -1;
}
catalog = (__nl_catd) catalog_desc;
#ifdef _POSIX_MAPPED_FILES
if (catalog->status == mmapped)
__munmap ((void *) catalog->file_ptr, catalog->file_size);
else
#endif /* _POSIX_MAPPED_FILES */
if (catalog->status == malloced)
free ((void *) catalog->file_ptr);
else
{
__set_errno (EBADF);
return -1;
}
free ((void *) catalog);
return 0;
}
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