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/*
Unix SMB/CIFS implementation.
tdb based replacement for gettext
Copyright (C) Andrew Tridgell 2001
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 of the License, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
static TDB_CONTEXT *tdb;
/* the currently selected language */
static char *current_lang;
/* load a msg file into the tdb */
static BOOL load_msg(const char *msg_file)
{
char **lines;
int num_lines, i;
char *msgid, *msgstr;
TDB_DATA key, data;
lines = file_lines_load(msg_file, &num_lines);
if (!lines) {
return False;
}
if (tdb_lockall(tdb) != 0) return False;
/* wipe the db */
tdb_traverse(tdb, tdb_traverse_delete_fn, NULL);
msgid = NULL;
for (i=0;i<num_lines;i++) {
if (strncmp(lines[i], "msgid \"", 7) == 0) {
msgid = lines[i] + 7;
}
if (msgid && strncmp(lines[i], "msgstr \"", 8) == 0) {
msgstr = lines[i] + 8;
trim_string(msgid, NULL, "\"");
trim_string(msgstr, NULL, "\"");
if (*msgstr == 0) {
msgstr = msgid;
}
key.dptr = msgid;
key.dsize = strlen(msgid)+1;
data.dptr = msgstr;
data.dsize = strlen(msgstr)+1;
tdb_store(tdb, key, data, 0);
msgid = NULL;
}
}
file_lines_free(lines);
tdb_unlockall(tdb);
return True;
}
/* work out what language to use from locale variables */
static const char *get_lang(void)
{
const char *vars[] = {"LANGUAGE", "LC_ALL", "LC_LANG", "LANG", NULL};
int i;
char *p;
for (i=0; vars[i]; i++) {
if ((p = getenv(vars[i]))) {
return p;
}
}
return NULL;
}
/* initialise the message translation subsystem. If the "lang" argument
is NULL then get the language from the normal environment variables */
BOOL lang_tdb_init(const char *lang)
{
char *path = NULL;
char *msg_path = NULL;
struct stat st;
static int initialised;
time_t loadtime;
TALLOC_CTX *mem_ctx;
/* we only want to init once per process, unless given
an override */
if (initialised && !lang) return True;
if (initialised) {
/* we are re-initialising, free up any old init */
if (tdb) {
tdb_close(tdb);
tdb = NULL;
}
SAFE_FREE(current_lang);
}
initialised = 1;
if (!lang) {
/* no lang given, use environment */
lang = get_lang();
}
/* if no lang then we don't translate */
if (!lang) return True;
mem_ctx = talloc_init("lang_tdb_init");
if (!mem_ctx) {
return False;
}
asprintf(&msg_path, "%s.msg", lib_path(mem_ctx, (const char *)lang));
if (stat(msg_path, &st) != 0) {
/* the msg file isn't available */
free(msg_path);
talloc_destroy(mem_ctx);
return False;
}
asprintf(&path, "%s%s.tdb", lock_path(mem_ctx, "lang_"), lang);
tdb = tdb_open(path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
if (!tdb) {
tdb = tdb_open(path, 0, TDB_DEFAULT, O_RDONLY, 0);
free(path);
free(msg_path);
talloc_destroy(mem_ctx);
if (!tdb) return False;
current_lang = strdup(lang);
return True;
}
free(path);
talloc_destroy(mem_ctx);
loadtime = tdb_fetch_int32(tdb, "/LOADTIME/");
if (loadtime == -1 || loadtime < st.st_mtime) {
load_msg(msg_path);
tdb_store_int32(tdb, "/LOADTIME/", (int)time(NULL));
}
free(msg_path);
current_lang = strdup(lang);
return True;
}
/* translate a msgid to a message string in the current language
returns a string that must be freed by calling lang_msg_free()
*/
char *lang_msg(const char *msgid)
{
TDB_DATA key, data;
lang_tdb_init(NULL);
if (!tdb) return strdup(msgid);
key.dptr = strdup(msgid);
key.dsize = strlen(msgid)+1;
data = tdb_fetch(tdb, key);
free(key.dptr);
/* if the message isn't found then we still need to return a pointer
that can be freed. Pity. */
if (!data.dptr)
return strdup(msgid);
return data.dptr;
}
/* free up a string from lang_msg() */
void lang_msg_free(char *msgstr)
{
free(msgstr);
}
/*
when the _() translation macro is used there is no obvious place to free
the resulting string and there is no easy way to give a static pointer.
All we can do is rotate between some static buffers and hope a single d_printf()
doesn't have more calls to _() than the number of buffers
*/
const char *lang_msg_rotate(const char *msgid)
{
#define NUM_LANG_BUFS 4
const char *msgstr;
static pstring bufs[NUM_LANG_BUFS];
static int next;
msgstr = lang_msg(msgid);
if (!msgstr) return msgid;
pstrcpy(bufs[next], msgstr);
msgstr = bufs[next];
next = (next+1) % NUM_LANG_BUFS;
return msgstr;
}
/*
return the current language - needed for language file mappings
*/
char *lang_tdb_current(void)
{
return current_lang;
}
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