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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-iconv.c
*
* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
*
* This library is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation.
*
* This library 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Michael Zucchi <notzed@ximian.com>
* Jeffery Stedfast <fejj@ximian.com>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <locale.h>
#ifdef HAVE_CODESET
#include <langinfo.h>
#endif
#include "camel-iconv.h"
#include "iconv-detect.h"
#define cd(x)
G_LOCK_DEFINE_STATIC (iconv);
struct _iconv_cache_node {
struct _iconv_cache *parent;
gint busy;
GIConv ip;
};
struct _iconv_cache {
gchar *conv;
GQueue open; /* stores iconv_cache_nodes, busy ones up front */
};
#define E_ICONV_CACHE_SIZE (16)
static GQueue iconv_cache_list = G_QUEUE_INIT;
static GHashTable *iconv_cache;
static GHashTable *iconv_cache_open;
static GHashTable *iconv_charsets = NULL;
static gchar *locale_charset = NULL;
static gchar *locale_lang = NULL;
struct {
const gchar *charset;
const gchar *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 camel_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
* camel_iconv_charset_name () so I'm not going to bother
* putting them all in here either... */
#endif
/* charset name (lowercase!), iconv-friendly name (sometimes case sensitive) */
{ "utf-8", "UTF-8" },
/* 10646 is a special case, its usually UCS-2 big endian */
/* This might need some checking but should be ok for solaris/linux */
{ "iso-10646-1", "UCS-2BE" },
{ "iso_10646-1", "UCS-2BE" },
{ "iso10646-1", "UCS-2BE" },
{ "iso-10646", "UCS-2BE" },
{ "iso_10646", "UCS-2BE" },
{ "iso10646", "UCS-2BE" },
{ "ks_c_5601-1987", "EUC-KR" },
/* FIXME: Japanese/Korean/Chinese stuff needs checking */
{ "euckr-0", "EUC-KR" },
{ "5601", "EUC-KR" },
{ "zh_TW-euc", "EUC-TW" },
{ "zh_CN.euc", "gb18030" },
{ "zh_TW-big5", "BIG5" },
{ "euc-cn", "gb18030" },
{ "big5-0", "BIG5" },
{ "big5.eten-0", "BIG5" },
{ "big5hkscs-0", "BIG5HKSCS" },
{ "gb2312-0", "gb18030" },
{ "gb2312.1980-0", "gb18030" },
{ "gb-2312", "gb18030" },
{ "gb2312", "gb18030" },
{ "gb18030-0", "gb18030" },
{ "gbk-0", "GBK" },
{ "eucjp-0", "eucJP" },
{ "ujis-0", "ujis" },
{ "jisx0208.1983-0","SJIS" },
{ "jisx0212.1990-0","SJIS" },
{ "pck", "SJIS" },
{ NULL, NULL }
};
static const gchar *
e_strdown (gchar *str)
{
register gchar *s = str;
while (*s) {
if (*s >= 'A' && *s <= 'Z')
*s += 0x20;
s++;
}
return str;
}
static const gchar *
e_strup (gchar *str)
{
register gchar *s = str;
while (*s) {
if (*s >= 'a' && *s <= 'z')
*s -= 0x20;
s++;
}
return str;
}
static void
locale_parse_lang (const gchar *locale)
{
gchar *codeset, *lang;
if ((codeset = strchr (locale, '.')))
lang = g_strndup (locale, codeset - locale);
else
lang = g_strdup (locale);
/* validate the language */
if (strlen (lang) >= 2) {
if (lang[2] == '-' || lang[2] == '_') {
/* canonicalise the lang */
e_strdown (lang);
/* validate the country code */
if (strlen (lang + 3) > 2) {
/* invalid country code */
lang[2] = '\0';
} else {
lang[2] = '-';
e_strup (lang + 3);
}
} else if (lang[2] != '\0') {
/* invalid language */
g_free (lang);
lang = NULL;
}
locale_lang = lang;
} else {
/* invalid language */
locale_lang = NULL;
g_free (lang);
}
}
/* NOTE: Owns the lock on return if keep is TRUE !*/
static void
iconv_init (gint keep)
{
gchar *from, *to, *locale;
gint i;
G_LOCK (iconv);
if (iconv_charsets != NULL) {
if (!keep)
G_UNLOCK (iconv);
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);
e_strdown (from);
g_hash_table_insert (iconv_charsets, from, to);
}
iconv_cache = g_hash_table_new (g_str_hash, g_str_equal);
iconv_cache_open = g_hash_table_new (NULL, NULL);
#ifndef G_OS_WIN32
locale = setlocale (LC_ALL, NULL);
#else
locale = g_win32_getlocale ();
#endif
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;
locale_lang = NULL;
} else {
#ifdef G_OS_WIN32
g_get_charset (&locale_charset);
locale_charset = g_strdup (locale_charset);
e_strdown (locale_charset);
#else
#ifdef HAVE_CODESET
locale_charset = g_strdup (nl_langinfo (CODESET));
e_strdown (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.
*/
gchar *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);
e_strdown (locale_charset);
} else {
/* charset unknown */
locale_charset = NULL;
}
#endif
#endif /* !G_OS_WIN32 */
/* parse the locale lang */
locale_parse_lang (locale);
}
#ifdef G_OS_WIN32
g_free (locale);
#endif
if (!keep)
G_UNLOCK (iconv);
}
const gchar *
camel_iconv_charset_name (const gchar *charset)
{
gchar *name, *ret, *tmp;
gsize name_len;
if (charset == NULL)
return NULL;
name_len = strlen (charset) + 1;
name = g_alloca (name_len);
g_strlcpy (name, charset, name_len);
e_strdown (name);
iconv_init (TRUE);
ret = g_hash_table_lookup (iconv_charsets, name);
if (ret != NULL) {
G_UNLOCK (iconv);
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 */
gint iso, codepage;
gchar *p;
tmp = name + 3;
if (*tmp == '-' || *tmp == '_')
tmp++;
iso = strtoul (tmp, &p, 10);
if (iso == 10646) {
/* they all become ICONV_10646 */
ret = g_strdup (ICONV_10646);
} else {
tmp = p;
if (*tmp == '-' || *tmp == '_')
tmp++;
codepage = strtoul (tmp, &p, 10);
if (p > tmp) {
/* codepage is numeric */
#ifdef __aix__
if (codepage == 13)
ret = g_strdup ("IBM-921");
else
#endif /* __aix__ */
ret = g_strdup_printf (ICONV_ISO_D_FORMAT, iso, codepage);
} else {
/* codepage is a string - probably iso-2022-jp or something */
ret = g_strdup_printf (ICONV_ISO_S_FORMAT, iso, p);
}
}
} 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);
G_UNLOCK (iconv);
return ret;
}
static void
flush_entry (struct _iconv_cache *ic)
{
struct _iconv_cache_node *in;
while ((in = g_queue_pop_head (&ic->open)) != NULL) {
if (in->ip != (GIConv) -1) {
g_hash_table_remove (iconv_cache_open, in->ip);
g_iconv_close (in->ip);
}
g_free (in);
}
g_free (ic->conv);
g_free (ic);
}
/* This should run pretty quick, its called a lot */
GIConv
camel_iconv_open (const gchar *oto,
const gchar *ofrom)
{
const gchar *to, *from;
gchar *tofrom;
gsize tofrom_len;
struct _iconv_cache *ic;
struct _iconv_cache_node *in;
gint errnosav;
GIConv ip;
if (oto == NULL || ofrom == NULL) {
errno = EINVAL;
return (GIConv) -1;
}
to = camel_iconv_charset_name (oto);
from = camel_iconv_charset_name (ofrom);
tofrom_len = strlen (to) + strlen (from) + 2;
tofrom = g_alloca (tofrom_len);
g_snprintf (tofrom, tofrom_len, "%s%%%s", to, from);
G_LOCK (iconv);
ic = g_hash_table_lookup (iconv_cache, tofrom);
if (ic) {
g_queue_remove (&iconv_cache_list, ic);
} else {
GList *link;
link = g_queue_peek_tail_link (&iconv_cache_list);
while (link != NULL && iconv_cache_list.length > E_ICONV_CACHE_SIZE) {
GList *prev = g_list_previous (link);
ic = (struct _iconv_cache *) link->data;
in = g_queue_peek_head (&ic->open);
if (in != NULL && !in->busy) {
cd (printf ("Flushing iconv converter '%s'\n", ic->conv));
g_queue_delete_link (&iconv_cache_list, link);
g_hash_table_remove (iconv_cache, ic->conv);
flush_entry (ic);
}
link = prev;
}
ic = g_malloc (sizeof (*ic));
g_queue_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));
}
g_queue_push_head (&iconv_cache_list, ic);
/* If we have a free iconv, use it */
in = g_queue_peek_tail (&ic->open);
if (in != NULL && !in->busy) {
cd (printf ("using existing iconv converter '%s'\n", ic->conv));
ip = in->ip;
if (ip != (GIConv) -1) {
/* work around some broken iconv implementations
* that die if the length arguments are NULL
*/
gsize buggy_iconv_len = 0;
gchar *buggy_iconv_buf = NULL;
/* resets the converter */
g_iconv (ip, &buggy_iconv_buf, &buggy_iconv_len, &buggy_iconv_buf, &buggy_iconv_len);
in->busy = TRUE;
g_queue_remove (&ic->open, in);
g_queue_push_head (&ic->open, in);
}
} else {
cd (printf ("creating new iconv converter '%s'\n", ic->conv));
ip = g_iconv_open (to, from);
in = g_malloc (sizeof (*in));
in->ip = ip;
in->parent = ic;
g_queue_push_head (&ic->open, in);
if (ip != (GIConv) -1) {
g_hash_table_insert (iconv_cache_open, ip, in);
in->busy = TRUE;
} else {
errnosav = errno;
g_warning ("Could not open converter for '%s' to '%s' charset", from, to);
in->busy = FALSE;
errno = errnosav;
}
}
G_UNLOCK (iconv);
return ip;
}
gsize
camel_iconv (GIConv cd,
const gchar **inbuf,
gsize *inbytesleft,
gchar **outbuf,
gsize *outbytesleft)
{
return g_iconv (cd, (gchar **) inbuf, inbytesleft, outbuf, outbytesleft);
}
void
camel_iconv_close (GIConv ip)
{
struct _iconv_cache_node *in;
if (ip == (GIConv) -1)
return;
G_LOCK (iconv);
in = g_hash_table_lookup (iconv_cache_open, ip);
if (in) {
cd (printf ("closing iconv converter '%s'\n", in->parent->conv));
g_queue_remove (&in->parent->open, in);
in->busy = FALSE;
g_queue_push_tail (&in->parent->open, in);
} else {
g_warning ("trying to close iconv i dont know about: %p", ip);
g_iconv_close (ip);
}
G_UNLOCK (iconv);
}
const gchar *
camel_iconv_locale_charset (void)
{
iconv_init (FALSE);
return locale_charset;
}
const gchar *
camel_iconv_locale_language (void)
{
iconv_init (FALSE);
return locale_lang;
}
/* map CJKR charsets to their language code */
/* NOTE: only support charset names that will be returned by
* camel_iconv_charset_name() so that we don't have to keep track of all
* the aliases too. */
static struct {
const gchar *charset;
const gchar *lang;
} cjkr_lang_map[] = {
{ "Big5", "zh" },
{ "BIG5HKSCS", "zh" },
{ "gb2312", "zh" },
{ "gb18030", "zh" },
{ "gbk", "zh" },
{ "euc-tw", "zh" },
{ "iso-2022-jp", "ja" },
{ "sjis", "ja" },
{ "ujis", "ja" },
{ "eucJP", "ja" },
{ "euc-jp", "ja" },
{ "euc-kr", "ko" },
{ "koi8-r", "ru" },
{ "koi8-u", "uk" }
};
const gchar *
camel_iconv_charset_language (const gchar *charset)
{
gint i;
if (!charset)
return NULL;
charset = camel_iconv_charset_name (charset);
for (i = 0; i < G_N_ELEMENTS (cjkr_lang_map); i++) {
if (!g_ascii_strcasecmp (cjkr_lang_map[i].charset, charset))
return cjkr_lang_map[i].lang;
}
return NULL;
}
|