150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@gnu.org>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <locale.h>
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#include <nl_types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include "catgetsinfo.h"
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/* Open the catalog and return a descriptor for the catalog. */
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nl_catd
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catopen (const char *cat_name, int flag)
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{
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__nl_catd result;
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const char *env_var = NULL;
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const char *nlspath = NULL;
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char *tmp = NULL;
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if (strchr (cat_name, '/') == NULL)
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{
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if (flag == NL_CAT_LOCALE)
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/* Use the current locale setting for LC_MESSAGES. */
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env_var = setlocale (LC_MESSAGES, NULL);
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else
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/* Use the LANG environment variable. */
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env_var = getenv ("LANG");
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if (env_var == NULL || *env_var == '\0'
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|| (__libc_enable_secure && strchr (env_var, '/') != NULL))
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env_var = "C";
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nlspath = getenv ("NLSPATH");
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if (nlspath != NULL && *nlspath != '\0')
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{
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/* Append the system dependent directory. */
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size_t len = strlen (nlspath) + 1 + sizeof NLSPATH;
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tmp = malloc (len);
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if (__glibc_unlikely (tmp == NULL))
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return (nl_catd) -1;
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__stpcpy (__stpcpy (__stpcpy (tmp, nlspath), ":"), NLSPATH);
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nlspath = tmp;
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}
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else
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nlspath = NLSPATH;
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}
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result = (__nl_catd) malloc (sizeof (*result));
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if (result == NULL)
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{
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/* We cannot get enough memory. */
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result = (nl_catd) -1;
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}
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else if (__open_catalog (cat_name, nlspath, env_var, result) != 0)
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{
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/* Couldn't open the file. */
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free ((void *) result);
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result = (nl_catd) -1;
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}
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free (tmp);
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return (nl_catd) result;
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}
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/* Return message from message catalog. */
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char *
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catgets (nl_catd catalog_desc, int set, int message, const char *string)
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{
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__nl_catd catalog;
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size_t idx;
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size_t cnt;
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/* Be generous if catalog which failed to be open is used. */
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if (catalog_desc == (nl_catd) -1 || ++set <= 0 || message < 0)
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return (char *) string;
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catalog = (__nl_catd) catalog_desc;
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idx = ((set * message) % catalog->plane_size) * 3;
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cnt = 0;
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do
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{
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if (catalog->name_ptr[idx + 0] == (uint32_t) set
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&& catalog->name_ptr[idx + 1] == (uint32_t) message)
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return (char *) &catalog->strings[catalog->name_ptr[idx + 2]];
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idx += catalog->plane_size * 3;
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}
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while (++cnt < catalog->plane_depth);
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__set_errno (ENOMSG);
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return (char *) string;
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}
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/* Return resources used for loaded message catalog. */
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int
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catclose (nl_catd catalog_desc)
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{
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__nl_catd catalog;
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/* Be generous if catalog which failed to be open is used. */
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if (catalog_desc == (nl_catd) -1)
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{
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__set_errno (EBADF);
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return -1;
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}
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catalog = (__nl_catd) catalog_desc;
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#ifdef _POSIX_MAPPED_FILES
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if (catalog->status == mmapped)
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__munmap ((void *) catalog->file_ptr, catalog->file_size);
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else
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#endif /* _POSIX_MAPPED_FILES */
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if (catalog->status == malloced)
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free ((void *) catalog->file_ptr);
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else
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{
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__set_errno (EBADF);
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return -1;
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}
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free ((void *) catalog);
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return 0;
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}
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