summaryrefslogtreecommitdiff
path: root/source3/intl/lang_tdb.c
blob: 8d514c5e7d47627e4f4a20fc9ebcf4084da6623a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   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 po file into the tdb */
static BOOL load_po(const char *po_file)
{
	char **lines;
	int num_lines, i;
	char *msgid, *msgstr;
	TDB_DATA key, data;

	lines = file_lines_load(po_file, &num_lines);

	if (!lines) {
		return False;
	}

	if (tdb_lockall(tdb) != 0) return False;

	/* wipe the db */
	tdb_traverse(tdb, (tdb_traverse_func) tdb_delete, NULL);
	
	for (i=0;i<num_lines;i++) {
		if (strncmp(lines[i], "msgid \"", 7) == 0) {
			msgid = lines[i] + 7;
		}
		if (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);
		}
	}

	file_lines_free(lines);
	tdb_unlockall(tdb);

	return True;
}


/* work out what language to use from locale variables */
static char *get_lang(void)
{
	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 *po_path = NULL;
	struct stat st;
	static int initialised;
	time_t loadtime;

	/* 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 */
		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;

	asprintf(&po_path, "%s.po", lib_path(lang));
	if (stat(po_path, &st) != 0) {
		/* the po file isn't available */
		free(po_path);
		return False;
	}
	

	asprintf(&path, "%s%s.tdb", lock_path("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(po_path);
		if (!tdb) return False;
		current_lang = strdup(lang);
		return True;
	}

	free(path);

	loadtime = tdb_fetch_int(tdb, "/LOADTIME/");

	if (loadtime == -1 || loadtime < st.st_mtime) {
		load_po(po_path);
		tdb_store_int(tdb, "/LOADTIME/", (int)time(NULL));
	}
	free(po_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 = (char *)msgid;
	key.dsize = strlen(msgid)+1;
	
	data = tdb_fetch(tdb, key);

	/* 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((void *)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
	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;
}