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/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
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 <alloca.h>
#include <errno.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;
const char *nlspath;
result = (__nl_catd) malloc (sizeof (*result));
if (result == NULL)
/* We cannot get enough memory. */
return (nl_catd) -1;
result->status = closed;
result->cat_name = __strdup (cat_name);
if (result->cat_name == NULL)
{
free (result);
__set_errno (ENOMEM);
return (nl_catd) -1;
}
if (strchr (cat_name, '/') == NULL)
{
if (flag == NL_CAT_LOCALE)
{
env_var = getenv ("LC_ALL");
if (env_var == NULL)
{
env_var = getenv ("LC_MESSAGES");
if (env_var == NULL)
{
env_var = getenv ("LANG");
if (env_var == NULL)
env_var = "C";
}
}
}
else
{
env_var = getenv ("LANG");
if (env_var == NULL)
env_var = "C";
}
result->env_var = __strdup (env_var);
if (result->env_var == NULL)
{
free ((void *) result->cat_name);
free ((void *) result);
__set_errno (ENOMEM);
return (nl_catd) -1;
}
nlspath = __secure_getenv ("NLSPATH");
result->nlspath = __strdup (nlspath != NULL && *nlspath != '\0'
? nlspath : NLSPATH);
if (result->nlspath == NULL)
{
free ((void *) result->cat_name);
free ((void *) result->env_var);
free ((void *) result);
__set_errno (ENOMEM);
return (nl_catd) -1;
}
}
else
{
result->env_var = NULL;
result->nlspath = NULL;
}
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;
if (catalog->status == closed)
__open_catalog (catalog, 1);
if (catalog->status == nonexisting)
{
__set_errno (EBADF);
return (char *) string;
}
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;
catalog = (__nl_catd) catalog_desc;
if (catalog->status == mmapped)
munmap ((void *) catalog->file_ptr, catalog->file_size);
else if (catalog->status == malloced)
free ((void *) catalog->file_ptr);
else if (catalog->status != closed && catalog->status != nonexisting)
{
__set_errno (EBADF);
return -1;
}
if (catalog->nlspath)
free ((void *) catalog->nlspath);
if (catalog->env_var)
free ((void *) catalog->env_var);
free ((void *) catalog);
return 0;
}
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