cat-compat.c
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上传日期:2007-01-04
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文件大小:6k
- /* Compatibility code for gettext-using-catgets interface.
- Copyright (C) 1995, 1997 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
- #include <stdio.h>
- #ifdef STDC_HEADERS
- # include <stdlib.h>
- # include <string.h>
- #else
- char *getenv ();
- # ifdef HAVE_MALLOC_H
- # include <malloc.h>
- # endif
- #endif
- #ifdef HAVE_NL_TYPES_H
- # include <nl_types.h>
- #endif
- #include "libgettext.h"
- /* @@ end of prolog @@ */
- /* XPG3 defines the result of `setlocale (category, NULL)' as:
- ``Directs `setlocale()' to query `category' and return the current
- setting of `local'.''
- However it does not specify the exact format. And even worse: POSIX
- defines this not at all. So we can use this feature only on selected
- system (e.g. those using GNU C Library). */
- #ifdef _LIBC
- # define HAVE_LOCALE_NULL
- #endif
- /* The catalog descriptor. */
- static nl_catd catalog = (nl_catd) -1;
- /* Name of the default catalog. */
- static const char default_catalog_name[] = "messages";
- /* Name of currently used catalog. */
- static const char *catalog_name = default_catalog_name;
- /* Get ID for given string. If not found return -1. */
- static int msg_to_cat_id PARAMS ((const char *msg));
- /* Substitution for systems lacking this function in their C library. */
- #if !_LIBC && !HAVE_STPCPY
- static char *stpcpy PARAMS ((char *dest, const char *src));
- #endif
- /* Set currently used domain/catalog. */
- char *
- textdomain (domainname)
- const char *domainname;
- {
- nl_catd new_catalog;
- char *new_name;
- size_t new_name_len;
- char *lang;
- #if defined HAVE_SETLOCALE && defined HAVE_LC_MESSAGES
- && defined HAVE_LOCALE_NULL
- lang = setlocale (LC_MESSAGES, NULL);
- #else
- lang = getenv ("LC_ALL");
- if (lang == NULL || lang[0] == ' ')
- {
- lang = getenv ("LC_MESSAGES");
- if (lang == NULL || lang[0] == ' ')
- lang = getenv ("LANG");
- }
- #endif
- if (lang == NULL || lang[0] == ' ')
- lang = "C";
- /* See whether name of currently used domain is asked. */
- if (domainname == NULL)
- return (char *) catalog_name;
- if (domainname[0] == ' ')
- domainname = default_catalog_name;
- /* Compute length of added path element. */
- new_name_len = sizeof (LOCALEDIR) - 1 + 1 + strlen (lang)
- + sizeof ("/LC_MESSAGES/") - 1 + sizeof (PACKAGE) - 1
- + sizeof (".cat");
- new_name = (char *) malloc (new_name_len);
- if (new_name == NULL)
- return NULL;
- strcpy (new_name, PACKAGE);
- new_catalog = catopen (new_name, 0);
- if (new_catalog == (nl_catd) -1)
- {
- /* NLSPATH search didn't work, try absolute path */
- sprintf (new_name, "%s/%s/LC_MESSAGES/%s.cat", LOCALEDIR, lang,
- PACKAGE);
- new_catalog = catopen (new_name, 0);
- if (new_catalog == (nl_catd) -1)
- {
- free (new_name);
- return (char *) catalog_name;
- }
- }
- /* Close old catalog. */
- if (catalog != (nl_catd) -1)
- catclose (catalog);
- if (catalog_name != default_catalog_name)
- free ((char *) catalog_name);
- catalog = new_catalog;
- catalog_name = new_name;
- return (char *) catalog_name;
- }
- char *
- bindtextdomain (domainname, dirname)
- const char *domainname;
- const char *dirname;
- {
- #if HAVE_SETENV || HAVE_PUTENV
- char *old_val, *new_val, *cp;
- size_t new_val_len;
- /* This does not make much sense here but to be compatible do it. */
- if (domainname == NULL)
- return NULL;
- /* Compute length of added path element. If we use setenv we don't need
- the first byts for NLSPATH=, but why complicate the code for this
- peanuts. */
- new_val_len = sizeof ("NLSPATH=") - 1 + strlen (dirname)
- + sizeof ("/%L/LC_MESSAGES/%N.cat");
- old_val = getenv ("NLSPATH");
- if (old_val == NULL || old_val[0] == ' ')
- {
- old_val = NULL;
- new_val_len += 1 + sizeof (LOCALEDIR) - 1
- + sizeof ("/%L/LC_MESSAGES/%N.cat");
- }
- else
- new_val_len += strlen (old_val);
- new_val = (char *) malloc (new_val_len);
- if (new_val == NULL)
- return NULL;
- # if HAVE_SETENV
- cp = new_val;
- # else
- cp = stpcpy (new_val, "NLSPATH=");
- # endif
- cp = stpcpy (cp, dirname);
- cp = stpcpy (cp, "/%L/LC_MESSAGES/%N.cat:");
- if (old_val == NULL)
- {
- # if __STDC__
- stpcpy (cp, LOCALEDIR "/%L/LC_MESSAGES/%N.cat");
- # else
- cp = stpcpy (cp, LOCALEDIR);
- stpcpy (cp, "/%L/LC_MESSAGES/%N.cat");
- # endif
- }
- else
- stpcpy (cp, old_val);
- # if HAVE_SETENV
- setenv ("NLSPATH", new_val, 1);
- free (new_val);
- # else
- putenv (new_val);
- /* Do *not* free the environment entry we just entered. It is used
- from now on. */
- # endif
- #endif
- return (char *) domainname;
- }
- #undef gettext
- char *
- gettext (msg)
- const char *msg;
- {
- int msgid;
- if (msg == NULL || catalog == (nl_catd) -1)
- return (char *) msg;
- /* Get the message from the catalog. We always use set number 1.
- The message ID is computed by the function `msg_to_cat_id'
- which works on the table generated by `po-to-tbl'. */
- msgid = msg_to_cat_id (msg);
- if (msgid == -1)
- return (char *) msg;
- return catgets (catalog, 1, msgid, (char *) msg);
- }
- /* Look through the table `_msg_tbl' which has `_msg_tbl_length' entries
- for the one equal to msg. If it is found return the ID. In case when
- the string is not found return -1. */
- static int
- msg_to_cat_id (msg)
- const char *msg;
- {
- int cnt;
- for (cnt = 0; cnt < _msg_tbl_length; ++cnt)
- if (strcmp (msg, _msg_tbl[cnt]._msg) == 0)
- return _msg_tbl[cnt]._msg_number;
- return -1;
- }
- /* @@ begin of epilog @@ */
- /* We don't want libintl.a to depend on any other library. So we
- avoid the non-standard function stpcpy. In GNU C Library this
- function is available, though. Also allow the symbol HAVE_STPCPY
- to be defined. */
- #if !_LIBC && !HAVE_STPCPY
- static char *
- stpcpy (dest, src)
- char *dest;
- const char *src;
- {
- while ((*dest++ = *src++) != ' ')
- /* Do nothing. */ ;
- return dest - 1;
- }
- #endif