From ef2e26c91b80556af033d3335e55f5dfa6fff31d Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 13 Aug 2003 01:53:07 +0000
Subject: first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)
---
 source4/intl/lang_tdb.c | 235 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 235 insertions(+)
 create mode 100644 source4/intl/lang_tdb.c

(limited to 'source4/intl/lang_tdb.c')

diff --git a/source4/intl/lang_tdb.c b/source4/intl/lang_tdb.c
new file mode 100644
index 00000000000..6879d70d166
--- /dev/null
+++ b/source4/intl/lang_tdb.c
@@ -0,0 +1,235 @@
+/* 
+   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_log(path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
+	if (!tdb) {
+		tdb = tdb_open_log(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()
+*/
+const char *lang_msg(const char *msgid)
+{
+	TDB_DATA key, data;
+
+	lang_tdb_init(NULL);
+
+	if (!tdb) return 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 (const char *)data.dptr;
+}
+
+
+/* free up a string from lang_msg() */
+void lang_msg_free(const char *msgstr)
+{
+	if (!tdb) return;
+	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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