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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* Copyright (C) 2001 Ximian Inc.
* Authors: Michael Zucchi <notzed@ximian.com>
* Jeffery Steadfast <fejj@ximian.com>
*
* This library 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 library; 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 <string.h>
#include <stdio.h>
#include <glib.h>
#include "e-iconv.h"
#include <locale.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#ifdef HAVE_CODESET
#include <langinfo.h>
#endif
/* FIXME: Use feature test */
#ifndef __sun__
#define ICONV_ISO_NEEDS_DASH (1)
#endif
#define cd(x)
#ifdef G_THREADS_ENABLED
static GStaticMutex lock = G_STATIC_MUTEX_INIT;
#define LOCK() g_static_mutex_lock(&lock)
#define UNLOCK() g_static_mutex_unlock(&lock)
#else
#define LOCK()
#define UNLOCK()
#endif
typedef struct _EDListNode {
struct _EDListNode *next;
struct _EDListNode *prev;
} EDListNode;
typedef struct _EDList {
struct _EDListNode *head;
struct _EDListNode *tail;
struct _EDListNode *tailpred;
} EDList;
#define E_DLIST_INITIALISER(l) { (EDListNode *)&l.tail, 0, (EDListNode *)&l.head }
struct _iconv_cache_node {
struct _iconv_cache_node *next;
struct _iconv_cache_node *prev;
struct _iconv_cache *parent;
int busy;
iconv_t ip;
};
struct _iconv_cache {
struct _iconv_cache *next;
struct _iconv_cache *prev;
char *conv;
EDList open; /* stores iconv_cache_nodes, busy ones up front */
};
#define E_ICONV_CACHE_SIZE (16)
static EDList iconv_cache_list;
static GHashTable *iconv_cache;
static GHashTable *iconv_cache_open;
static unsigned int iconv_cache_size = 0;
static GHashTable *iconv_charsets = NULL;
static const char *locale_charset = NULL;
struct {
char *charset;
char *iconv_name;
} known_iconv_charsets[] = {
#if 0
/* charset name, iconv-friendly charset name */
{ "iso-8859-1", "iso-8859-1" },
{ "iso8859-1", "iso-8859-1" },
/* the above mostly serves as an example for iso-style charsets,
but we have code that will populate the iso-*'s if/when they
show up in e_iconv_charset_name() so I'm
not going to bother putting them all in here... */
{ "windows-cp1251", "cp1251" },
{ "windows-1251", "cp1251" },
{ "cp1251", "cp1251" },
/* the above mostly serves as an example for windows-style
charsets, but we have code that will parse and convert them
to their cp#### equivalents if/when they show up in
e_iconv_charset_name() so I'm not going to bother
putting them all in here either... */
#endif
{ "utf-8", "UTF-8" },
{ "ks_c_5601-1987", "EUC-KR" },
/* FIXME: Japanese/Korean/Chinese stuff needs checking */
{ "euckr-0", "EUC-KR" },
{ "big5-0", "BIG5" },
{ "big5.eten-0", "BIG5" },
{ "big5hkscs-0", "BIG5HKCS" },
{ "gb2312-0", "gb2312" },
{ "gb2312.1980-0", "gb2312" },
{ "gb18030-0", "gb18030" },
{ "gbk-0", "GBK" },
{ "eucjp-0", "eucJP" },
{ "ujis-0", "ujis" },
{ "jisx0208.1983-0","SJIS" },
{ "jisx0212.1990-0","SJIS" },
{ NULL, NULL }
};
/* Another copy of this trivial list implementation
Why? This stuff gets called a lot (potentially), should run fast,
and g_list's are f@@#$ed up to make this a hassle */
static void e_dlist_init(EDList *v)
{
v->head = (EDListNode *)&v->tail;
v->tail = 0;
v->tailpred = (EDListNode *)&v->head;
}
static EDListNode *e_dlist_addhead(EDList *l, EDListNode *n)
{
n->next = l->head;
n->prev = (EDListNode *)&l->head;
l->head->prev = n;
l->head = n;
return n;
}
static EDListNode *e_dlist_addtail(EDList *l, EDListNode *n)
{
n->next = (EDListNode *)&l->tail;
n->prev = l->tailpred;
l->tailpred->next = n;
l->tailpred = n;
return n;
}
static EDListNode *e_dlist_remove(EDListNode *n)
{
n->next->prev = n->prev;
n->prev->next = n->next;
return n;
}
/* NOTE: Owns the lock on return if keep is TRUE ! */
static void
e_iconv_init(int keep)
{
char *from, *to, *locale;
int i;
LOCK();
if (iconv_charsets != NULL) {
if (!keep)
UNLOCK();
return;
}
iconv_charsets = g_hash_table_new(g_str_hash, g_str_equal);
for (i = 0; known_iconv_charsets[i].charset != NULL; i++) {
from = g_strdup(known_iconv_charsets[i].charset);
to = g_strdup(known_iconv_charsets[i].iconv_name);
g_strdown(from);
g_hash_table_insert(iconv_charsets, from, to);
}
e_dlist_init(&iconv_cache_list);
iconv_cache = g_hash_table_new(g_str_hash, g_str_equal);
iconv_cache_open = g_hash_table_new(NULL, NULL);
locale = setlocale (LC_ALL, NULL);
if (!locale || !strcmp (locale, "C") || !strcmp (locale, "POSIX")) {
/* The locale "C" or "POSIX" is a portable locale; its
* LC_CTYPE part corresponds to the 7-bit ASCII character
* set.
*/
locale_charset = NULL;
} else {
#ifdef HAVE_CODESET
locale_charset = g_strdup(nl_langinfo(CODESET));
g_strdown((char *)locale_charset);
#else
/* A locale name is typically of the form language[_terri-
* tory][.codeset][@modifier], where language is an ISO 639
* language code, territory is an ISO 3166 country code, and
* codeset is a character set or encoding identifier like
* ISO-8859-1 or UTF-8.
*/
char *codeset, *p;
codeset = strchr (locale, '.');
if (codeset) {
codeset++;
/* ; is a hack for debian systems and / is a hack for Solaris systems */
for (p = codeset; *p && !strchr ("@;/", *p); p++);
locale_charset = g_strndup (codeset, p - codeset);
g_strdown (locale_charset);
} else {
/* charset unknown */
locale_charset = NULL;
}
#endif
}
if (!keep)
UNLOCK();
}
const char *e_iconv_charset_name(const char *charset)
{
char *name, *ret, *tmp;
if (charset == NULL)
return NULL;
name = alloca(strlen(charset)+1);
strcpy(name, charset);
g_strdown(name);
e_iconv_init(TRUE);
ret = g_hash_table_lookup(iconv_charsets, name);
if (ret != NULL) {
UNLOCK();
return ret;
}
/* Unknown, try canonicalise some basic charset types to something that should work */
if (strncmp(name, "iso", 3) == 0) {
/* Convert iso-nnnn-n or isonnnn-n or iso_nnnn-n to iso-nnnn-n or isonnnn-n */
tmp = name+3;
if (tmp[0] == '_' || tmp[0] == '-')
tmp++;
#ifdef ICONV_ISO_NEEDS_DASH
ret = g_strdup_printf("ISO-%s", tmp);
#else
ret = g_strdup_printf("ISO%s", tmp);
#endif
} else if (strncmp(name, "windows-", 8) == 0) {
/* Convert windows-nnnnn or windows-cpnnnnn to cpnnnn */
tmp = name+8;
if (!strncmp(tmp, "cp", 2))
tmp+=2;
ret = g_strdup_printf("CP%s", tmp);
} else if (strncmp(name, "microsoft-", 10) == 0) {
/* Convert microsoft-nnnnn or microsoft-cpnnnnn to cpnnnn */
tmp = name+10;
if (!strncmp(tmp, "cp", 2))
tmp+=2;
ret = g_strdup_printf("CP%s", tmp);
} else {
/* Just assume its ok enough as is, case and all */
ret = g_strdup(charset);
}
g_hash_table_insert(iconv_charsets, g_strdup(name), ret);
UNLOCK();
return ret;
}
static void
flush_entry(struct _iconv_cache *ic)
{
struct _iconv_cache_node *in, *nn;
in = (struct _iconv_cache_node *)ic->open.head;
nn = in->next;
while (nn) {
if (in->ip != (iconv_t)-1) {
g_hash_table_remove(iconv_cache_open, in->ip);
iconv_close(in->ip);
}
g_free(in);
in = nn;
nn = in->next;
}
g_free(ic);
}
/* This should run pretty quick, its called a lot */
iconv_t e_iconv_open(const char *oto, const char *ofrom)
{
const char *to, *from;
char *tofrom;
struct _iconv_cache *ic;
struct _iconv_cache_node *in;
iconv_t ip;
if (oto == NULL || ofrom == NULL)
return (iconv_t)-1;
to = e_iconv_charset_name (oto);
from = e_iconv_charset_name (ofrom);
tofrom = alloca(strlen(to) +strlen(from) + 2);
sprintf(tofrom, "%s%%%s", to, from);
LOCK();
ic = g_hash_table_lookup(iconv_cache, tofrom);
if (ic) {
e_dlist_remove((EDListNode *)ic);
} else {
struct _iconv_cache *last = (struct _iconv_cache *)iconv_cache_list.tailpred;
struct _iconv_cache *prev;
prev = last->prev;
while (prev && iconv_cache_size > E_ICONV_CACHE_SIZE) {
in = (struct _iconv_cache_node *)last->open.head;
if (in->next && !in->busy) {
cd(printf("Flushing iconv converter '%s'\n", last->conv));
e_dlist_remove((EDListNode *)last);
g_hash_table_remove(iconv_cache, last->conv);
flush_entry(last);
iconv_cache_size--;
}
last = prev;
prev = last->prev;
}
iconv_cache_size++;
ic = g_malloc(sizeof(*ic));
e_dlist_init(&ic->open);
ic->conv = g_strdup(tofrom);
g_hash_table_insert(iconv_cache, ic->conv, ic);
cd(printf("Creating iconv converter '%s'\n", ic->conv));
}
e_dlist_addhead(&iconv_cache_list, (EDListNode *)ic);
/* If we have a free iconv, use it */
in = (struct _iconv_cache_node *)ic->open.tailpred;
if (in->prev && !in->busy) {
cd(printf("using existing iconv converter '%s'\n", ic->conv));
ip = in->ip;
if (ip != (iconv_t)-1) {
/* resets the converter */
iconv(ip, NULL, NULL, NULL, NULL);
in->busy = TRUE;
e_dlist_remove((EDListNode *)in);
e_dlist_addhead(&ic->open, (EDListNode *)in);
}
} else {
cd(printf("creating new iconv converter '%s'\n", ic->conv));
ip = iconv_open(to, from);
in = g_malloc(sizeof(*in));
in->ip = ip;
in->parent = ic;
e_dlist_addhead(&ic->open, (EDListNode *)in);
if (ip != (iconv_t)-1) {
g_hash_table_insert(iconv_cache_open, ip, in);
in->busy = TRUE;
} else {
g_warning("Could not open converter for '%s' to '%s' charset", from, to);
in->busy = FALSE;
}
}
UNLOCK();
return ip;
}
void
e_iconv_close(iconv_t ip)
{
struct _iconv_cache_node *in;
if (ip == (iconv_t)-1)
return;
LOCK();
in = g_hash_table_lookup(iconv_cache_open, ip);
if (in) {
cd(printf("closing iconv converter '%s'\n", in->parent->conv));
e_dlist_remove((EDListNode *)in);
in->busy = FALSE;
e_dlist_addtail(&in->parent->open, (EDListNode *)in);
} else {
g_warning("trying to close iconv i dont know about: %p", ip);
iconv_close(ip);
}
UNLOCK();
}
const char *e_iconv_locale_charset(void)
{
e_iconv_init(FALSE);
return locale_charset;
}
|