src/codeconv.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <string.h>
  29 #include <ctype.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32
  33 #if HAVE_LOCALE_H
  34 #  include <locale.h>
  35 #endif
  36
  37 #include "codeconv.h"
  38 #include "unmime.h"
  39 #include "base64.h"
  40 #include "quoted-printable.h"
  41 #include "utils.h"
  42 #include "prefs_common.h"
  43
  44 /* For unknown reasons the inconv.m4 macro undefs that macro if no
  45    const is needed.  This would break the code below so we define it. */
  46 #ifndef ICONV_CONST
  47 #define ICONV_CONST
  48 #endif
  49
  50 typedef enum
  51 {
  52         JIS_ASCII,
  53         JIS_KANJI,
  54         JIS_HWKANA,
  55         JIS_AUXKANJI
  56 } JISState;
  57
  58 #define SUBST_CHAR      0x5f;
  59 #define ESC             '\033'
  60
  61 #define iseuckanji(c) \
  62         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xfe)
  63 #define iseuchwkana1(c) \
  64         (((c) & 0xff) == 0x8e)
  65 #define iseuchwkana2(c) \
  66         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
  67 #define iseucaux(c) \
  68         (((c) & 0xff) == 0x8f)
  69 #define issjiskanji1(c) \
  70         ((((c) & 0xff) >= 0x81 && ((c) & 0xff) <= 0x9f) || \
  71          (((c) & 0xff) >= 0xe0 && ((c) & 0xff) <= 0xfc))
  72 #define issjiskanji2(c) \
  73         ((((c) & 0xff) >= 0x40 && ((c) & 0xff) <= 0x7e) || \
  74          (((c) & 0xff) >= 0x80 && ((c) & 0xff) <= 0xfc))
  75 #define issjishwkana(c) \
  76         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
  77
  78 #define K_IN()                          \
  79         if (state != JIS_KANJI) {       \
  80                 *out++ = ESC;           \
  81                 *out++ = '$';           \
  82                 *out++ = 'B';           \
  83                 state = JIS_KANJI;      \
  84         }
  85
  86 #define K_OUT()                         \
  87         if (state != JIS_ASCII) {       \
  88                 *out++ = ESC;           \
  89                 *out++ = '(';           \
  90                 *out++ = 'B';           \
  91                 state = JIS_ASCII;      \
  92         }
  93
  94 #define HW_IN()                         \
  95         if (state != JIS_HWKANA) {      \
  96                 *out++ = ESC;           \
  97                 *out++ = '(';           \
  98                 *out++ = 'I';           \
  99                 state = JIS_HWKANA;     \
 100         }
 101
 102 #define AUX_IN()                        \
 103         if (state != JIS_AUXKANJI) {    \
 104                 *out++ = ESC;           \
 105                 *out++ = '$';           \
 106                 *out++ = '(';           \
 107                 *out++ = 'D';           \
 108                 state = JIS_AUXKANJI;   \
 109         }
 110
 111 static CodeConvFunc conv_get_code_conv_func     (const gchar    *src_charset_str,
 112                                          const gchar    *dest_charset_str);
 113
 114 static gchar *conv_iconv_strdup_with_cd (const gchar    *inbuf,
 115                                          iconv_t         cd);
 116
 117 static gchar *conv_iconv_strdup         (const gchar    *inbuf,
 118                                          const gchar    *src_code,
 119                                          const gchar    *dest_code);
 120
 121 static CharSet conv_get_locale_charset                  (void);
 122 static CharSet conv_get_outgoing_charset                (void);
 123 static CharSet conv_guess_ja_encoding(const gchar *str);
 124 static gboolean conv_is_ja_locale                       (void);
 125
 126 static void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 127 static void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf);
 128 static void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 129
 130 static void conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 131 static void conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 132 static void conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 133 static void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 134
 135 static void conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 136 static void conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf);
 137
 138 static void conv_unreadable_8bit(gchar *str);
 139
 140 static void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 141 static void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 142 static void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 143
 144 static void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 145 static void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 146 static void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf);
 147
 148 static gboolean strict_mode = FALSE;
 149
 150 void codeconv_set_strict(gboolean mode)
 151 {
 152         strict_mode = mode;
 153 }
 154
 155 static void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 156 {
 157         const guchar *in = inbuf;
 158         guchar *out = outbuf;
 159         JISState state = JIS_ASCII;
 160
 161         while (*in != '\0') {
 162                 if (*in == ESC) {
 163                         in++;
 164                         if (*in == '$') {
 165                                 if (*(in + 1) == '@' || *(in + 1) == 'B') {
 166                                         state = JIS_KANJI;
 167                                         in += 2;
 168                                 } else if (*(in + 1) == '(' &&
 169                                            *(in + 2) == 'D') {
 170                                         state = JIS_AUXKANJI;
 171                                         in += 3;
 172                                 } else {
 173                                         /* unknown escape sequence */
 174                                         state = JIS_ASCII;
 175                                 }
 176                         } else if (*in == '(') {
 177                                 if (*(in + 1) == 'B' || *(in + 1) == 'J') {
 178                                         state = JIS_ASCII;
 179                                         in += 2;
 180                                 } else if (*(in + 1) == 'I') {
 181                                         state = JIS_HWKANA;
 182                                         in += 2;
 183                                 } else {
 184                                         /* unknown escape sequence */
 185                                         state = JIS_ASCII;
 186                                 }
 187                         } else {
 188                                 /* unknown escape sequence */
 189                                 state = JIS_ASCII;
 190                         }
 191                 } else if (*in == 0x0e) {
 192                         state = JIS_HWKANA;
 193                         in++;
 194                 } else if (*in == 0x0f) {
 195                         state = JIS_ASCII;
 196                         in++;
 197                 } else {
 198                         switch (state) {
 199                         case JIS_ASCII:
 200                                 *out++ = *in++;
 201                                 break;
 202                         case JIS_KANJI:
 203                                 *out++ = *in++ | 0x80;
 204                                 if (*in == '\0') break;
 205                                 *out++ = *in++ | 0x80;
 206                                 break;
 207                         case JIS_HWKANA:
 208                                 *out++ = 0x8e;
 209                                 *out++ = *in++ | 0x80;
 210                                 break;
 211                         case JIS_AUXKANJI:
 212                                 *out++ = 0x8f;
 213                                 *out++ = *in++ | 0x80;
 214                                 if (*in == '\0') break;
 215                                 *out++ = *in++ | 0x80;
 216                                 break;
 217                         }
 218                 }
 219         }
 220
 221         *out = '\0';
 222 }
 223
 224 #define JIS_HWDAKUTEN           0x5e
 225 #define JIS_HWHANDAKUTEN        0x5f
 226
 227 static gint conv_jis_hantozen(guchar *outbuf, guchar jis_code, guchar sound_sym)
 228 {
 229         static guint16 h2z_tbl[] = {
 230                 /* 0x20 - 0x2f */
 231                 0x0000, 0x2123, 0x2156, 0x2157, 0x2122, 0x2126, 0x2572, 0x2521,
 232                 0x2523, 0x2525, 0x2527, 0x2529, 0x2563, 0x2565, 0x2567, 0x2543,
 233                 /* 0x30 - 0x3f */
 234                 0x213c, 0x2522, 0x2524, 0x2526, 0x2528, 0x252a, 0x252b, 0x252d,
 235                 0x252f, 0x2531, 0x2533, 0x2535, 0x2537, 0x2539, 0x253b, 0x253d,
 236                 /* 0x40 - 0x4f */
 237                 0x253f, 0x2541, 0x2544, 0x2546, 0x2548, 0x254a, 0x254b, 0x254c,
 238                 0x254d, 0x254e, 0x254f, 0x2552, 0x2555, 0x2558, 0x255b, 0x255e,
 239                 /* 0x50 - 0x5f */
 240                 0x255f, 0x2560, 0x2561, 0x2562, 0x2564, 0x2566, 0x2568, 0x2569,
 241                 0x256a, 0x256b, 0x256c, 0x256d, 0x256f, 0x2573, 0x212b, 0x212c
 242         };
 243
 244         static guint16 dakuten_tbl[] = {
 245                 /* 0x30 - 0x3f */
 246                 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x252c, 0x252e,
 247                 0x2530, 0x2532, 0x2534, 0x2536, 0x2538, 0x253a, 0x253c, 0x253e,
 248                 /* 0x40 - 0x4f */
 249                 0x2540, 0x2542, 0x2545, 0x2547, 0x2549, 0x0000, 0x0000, 0x0000,
 250                 0x0000, 0x0000, 0x2550, 0x2553, 0x2556, 0x2559, 0x255c, 0x0000
 251         };
 252
 253         static guint16 handakuten_tbl[] = {
 254                 /* 0x4a - 0x4e */
 255                 0x2551, 0x2554, 0x2557, 0x255a, 0x255d
 256         };
 257
 258         guint16 out_code;
 259
 260         jis_code &= 0x7f;
 261         sound_sym &= 0x7f;
 262
 263         if (jis_code < 0x21 || jis_code > 0x5f)
 264                 return 0;
 265
 266         if (sound_sym == JIS_HWDAKUTEN &&
 267             jis_code >= 0x36 && jis_code <= 0x4e) {
 268                 out_code = dakuten_tbl[jis_code - 0x30];
 269                 if (out_code != 0) {
 270                         *outbuf = out_code >> 8;
 271                         *(outbuf + 1) = out_code & 0xff;
 272                         return 2;
 273                 }
 274         }
 275
 276         if (sound_sym == JIS_HWHANDAKUTEN &&
 277             jis_code >= 0x4a && jis_code <= 0x4e) {
 278                 out_code = handakuten_tbl[jis_code - 0x4a];
 279                 *outbuf = out_code >> 8;
 280                 *(outbuf + 1) = out_code & 0xff;
 281                 return 2;
 282         }
 283
 284         out_code = h2z_tbl[jis_code - 0x20];
 285         *outbuf = out_code >> 8;
 286         *(outbuf + 1) = out_code & 0xff;
 287         return 1;
 288 }
 289
 290 static void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 291 {
 292         const guchar *in = inbuf;
 293         guchar *out = outbuf;
 294         JISState state = JIS_ASCII;
 295
 296         while (*in != '\0') {
 297                 if (IS_ASCII(*in)) {
 298                         K_OUT();
 299                         *out++ = *in++;
 300                 } else if (iseuckanji(*in)) {
 301                         if (iseuckanji(*(in + 1))) {
 302                                 K_IN();
 303                                 *out++ = *in++ & 0x7f;
 304                                 *out++ = *in++ & 0x7f;
 305                         } else {
 306                                 K_OUT();
 307                                 *out++ = SUBST_CHAR;
 308                                 in++;
 309                                 if (*in != '\0' && !IS_ASCII(*in)) {
 310                                         *out++ = SUBST_CHAR;
 311                                         in++;
 312                                 }
 313                         }
 314                 } else if (iseuchwkana1(*in)) {
 315                         if (iseuchwkana2(*(in + 1))) {
 316                                 if (prefs_common.allow_jisx0201_kana) {
 317                                         HW_IN();
 318                                         in++;
 319                                         *out++ = *in++ & 0x7f;
 320                                 } else {
 321                                         guchar jis_ch[2];
 322                                         gint len;
 323
 324                                         if (iseuchwkana1(*(in + 2)) &&
 325                                             iseuchwkana2(*(in + 3)))
 326                                                 len = conv_jis_hantozen
 327                                                         (jis_ch,
 328                                                          *(in + 1), *(in + 3));
 329                                         else
 330                                                 len = conv_jis_hantozen
 331                                                         (jis_ch,
 332                                                          *(in + 1), '\0');
 333                                         if (len == 0)
 334                                                 in += 2;
 335                                         else {
 336                                                 K_IN();
 337                                                 in += len * 2;
 338                                                 *out++ = jis_ch[0];
 339                                                 *out++ = jis_ch[1];
 340                                         }
 341                                 }
 342                         } else {
 343                                 K_OUT();
 344                                 in++;
 345                                 if (*in != '\0' && !IS_ASCII(*in)) {
 346                                         *out++ = SUBST_CHAR;
 347                                         in++;
 348                                 }
 349                         }
 350                 } else if (iseucaux(*in)) {
 351                         in++;
 352                         if (iseuckanji(*in) && iseuckanji(*(in + 1))) {
 353                                 AUX_IN();
 354                                 *out++ = *in++ & 0x7f;
 355                                 *out++ = *in++ & 0x7f;
 356                         } else {
 357                                 K_OUT();
 358                                 if (*in != '\0' && !IS_ASCII(*in)) {
 359                                         *out++ = SUBST_CHAR;
 360                                         in++;
 361                                         if (*in != '\0' && !IS_ASCII(*in)) {
 362                                                 *out++ = SUBST_CHAR;
 363                                                 in++;
 364                                         }
 365                                 }
 366                         }
 367                 } else {
 368                         K_OUT();
 369                         *out++ = SUBST_CHAR;
 370                         in++;
 371                 }
 372         }
 373
 374         K_OUT();
 375         *out = '\0';
 376 }
 377
 378 static void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 379 {
 380         const guchar *in = inbuf;
 381         guchar *out = outbuf;
 382
 383         while (*in != '\0') {
 384                 if (IS_ASCII(*in)) {
 385                         *out++ = *in++;
 386                 } else if (issjiskanji1(*in)) {
 387                         if (issjiskanji2(*(in + 1))) {
 388                                 guchar out1 = *in;
 389                                 guchar out2 = *(in + 1);
 390                                 guchar row;
 391
 392                                 row = out1 < 0xa0 ? 0x70 : 0xb0;
 393                                 if (out2 < 0x9f) {
 394                                         out1 = (out1 - row) * 2 - 1;
 395                                         out2 -= out2 > 0x7f ? 0x20 : 0x1f;
 396                                 } else {
 397                                         out1 = (out1 - row) * 2;
 398                                         out2 -= 0x7e;
 399                                 }
 400
 401                                 *out++ = out1 | 0x80;
 402                                 *out++ = out2 | 0x80;
 403                                 in += 2;
 404                         } else {
 405                                 *out++ = SUBST_CHAR;
 406                                 in++;
 407                                 if (*in != '\0' && !IS_ASCII(*in)) {
 408                                         *out++ = SUBST_CHAR;
 409                                         in++;
 410                                 }
 411                         }
 412                 } else if (issjishwkana(*in)) {
 413                         *out++ = 0x8e;
 414                         *out++ = *in++;
 415                 } else {
 416                         *out++ = SUBST_CHAR;
 417                         in++;
 418                 }
 419         }
 420
 421         *out = '\0';
 422 }
 423
 424 static void conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 425 {
 426         gchar *eucstr;
 427
 428         Xalloca(eucstr, outlen, return);
 429
 430         conv_jistoeuc(eucstr, outlen, inbuf);
 431         conv_euctoutf8(outbuf, outlen, eucstr);
 432 }
 433
 434 static void conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 435 {
 436         gchar *tmpstr;
 437
 438         tmpstr = conv_iconv_strdup(inbuf, CS_SHIFT_JIS, CS_UTF_8);
 439         if (tmpstr) {
 440                 strncpy2(outbuf, tmpstr, outlen);
 441                 g_free(tmpstr);
 442         } else
 443                 strncpy2(outbuf, inbuf, outlen);
 444 }
 445
 446 static void conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 447 {
 448         static iconv_t cd = (iconv_t)-1;
 449         static gboolean iconv_ok = TRUE;
 450         gchar *tmpstr;
 451
 452         if (cd == (iconv_t)-1) {
 453                 if (!iconv_ok) {
 454                         strncpy2(outbuf, inbuf, outlen);
 455                         return;
 456                 }
 457                 cd = iconv_open(CS_UTF_8, CS_EUC_JP_MS);
 458                 if (cd == (iconv_t)-1) {
 459                         cd = iconv_open(CS_UTF_8, CS_EUC_JP);
 460                         if (cd == (iconv_t)-1) {
 461                                 g_warning("conv_euctoutf8(): %s\n",
 462                                           g_strerror(errno));
 463                                 iconv_ok = FALSE;
 464                                 strncpy2(outbuf, inbuf, outlen);
 465                                 return;
 466                         }
 467                 }
 468         }
 469
 470         tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
 471         if (tmpstr) {
 472                 strncpy2(outbuf, tmpstr, outlen);
 473                 g_free(tmpstr);
 474         } else
 475                 strncpy2(outbuf, inbuf, outlen);
 476 }
 477
 478 static void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 479 {
 480         switch (conv_guess_ja_encoding(inbuf)) {
 481         case C_ISO_2022_JP:
 482                 conv_jistoutf8(outbuf, outlen, inbuf);
 483                 break;
 484         case C_SHIFT_JIS:
 485                 conv_sjistoutf8(outbuf, outlen, inbuf);
 486                 break;
 487         case C_EUC_JP:
 488                 conv_euctoutf8(outbuf, outlen, inbuf);
 489                 break;
 490         default:
 491                 strncpy2(outbuf, inbuf, outlen);
 492                 break;
 493         }
 494 }
 495
 496 static void conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 497 {
 498         static iconv_t cd = (iconv_t)-1;
 499         static gboolean iconv_ok = TRUE;
 500         gchar *tmpstr;
 501
 502         if (cd == (iconv_t)-1) {
 503                 if (!iconv_ok) {
 504                         strncpy2(outbuf, inbuf, outlen);
 505                         return;
 506                 }
 507                 cd = iconv_open(CS_EUC_JP_MS, CS_UTF_8);
 508                 if (cd == (iconv_t)-1) {
 509                         cd = iconv_open(CS_EUC_JP, CS_UTF_8);
 510                         if (cd == (iconv_t)-1) {
 511                                 g_warning("conv_utf8toeuc(): %s\n",
 512                                           g_strerror(errno));
 513                                 iconv_ok = FALSE;
 514                                 strncpy2(outbuf, inbuf, outlen);
 515                                 return;
 516                         }
 517                 }
 518         }
 519
 520         tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
 521         if (tmpstr) {
 522                 strncpy2(outbuf, tmpstr, outlen);
 523                 g_free(tmpstr);
 524         } else
 525                 strncpy2(outbuf, inbuf, outlen);
 526 }
 527
 528 static void conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 529 {
 530         gchar *eucstr;
 531
 532         Xalloca(eucstr, outlen, return);
 533
 534         conv_utf8toeuc(eucstr, outlen, inbuf);
 535         conv_euctojis(outbuf, outlen, eucstr);
 536 }
 537
 538 static void conv_unreadable_8bit(gchar *str)
 539 {
 540         register guchar *p = str;
 541
 542         while (*p != '\0') {
 543                 /* convert CR+LF -> LF */
 544                 if (*p == '\r' && *(p + 1) == '\n')
 545                         memmove(p, p + 1, strlen(p));
 546                 else if (!IS_ASCII(*p)) *p = SUBST_CHAR;
 547                 p++;
 548         }
 549 }
 550
 551 static CharSet conv_guess_ja_encoding(const gchar *str)
 552 {
 553         const guchar *p = str;
 554         CharSet guessed = C_US_ASCII;
 555
 556         while (*p != '\0') {
 557                 if (*p == ESC && (*(p + 1) == '$' || *(p + 1) == '(')) {
 558                         if (guessed == C_US_ASCII)
 559                                 return C_ISO_2022_JP;
 560                         p += 2;
 561                 } else if (IS_ASCII(*p)) {
 562                         p++;
 563                 } else if (iseuckanji(*p) && iseuckanji(*(p + 1))) {
 564                         if (*p >= 0xfd && *p <= 0xfe)
 565                                 return C_EUC_JP;
 566                         else if (guessed == C_SHIFT_JIS) {
 567                                 if ((issjiskanji1(*p) &&
 568                                      issjiskanji2(*(p + 1))) ||
 569                                     issjishwkana(*p))
 570                                         guessed = C_SHIFT_JIS;
 571                                 else
 572                                         guessed = C_EUC_JP;
 573                         } else
 574                                 guessed = C_EUC_JP;
 575                         p += 2;
 576                 } else if (issjiskanji1(*p) && issjiskanji2(*(p + 1))) {
 577                         if (iseuchwkana1(*p) && iseuchwkana2(*(p + 1)))
 578                                 guessed = C_SHIFT_JIS;
 579                         else
 580                                 return C_SHIFT_JIS;
 581                         p += 2;
 582                 } else if (issjishwkana(*p)) {
 583                         guessed = C_SHIFT_JIS;
 584                         p++;
 585                 } else {
 586                         p++;
 587                 }
 588         }
 589
 590         return guessed;
 591 }
 592
 593 static void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 594 {
 595         conv_jistoutf8(outbuf, outlen, inbuf);
 596 }
 597
 598 static void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 599 {
 600         conv_sjistoutf8(outbuf, outlen, inbuf);
 601 }
 602
 603 static void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 604 {
 605         conv_euctoutf8(outbuf, outlen, inbuf);
 606 }
 607
 608 void conv_utf8todisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 609 {
 610         if (g_utf8_validate(inbuf, -1, NULL) == TRUE)
 611                 strncpy2(outbuf, inbuf, outlen);
 612         else
 613                 conv_ustodisp(outbuf, outlen, inbuf);
 614 }
 615
 616 static void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 617 {
 618         conv_anytoutf8(outbuf, outlen, inbuf);
 619         if (g_utf8_validate(outbuf, -1, NULL) != TRUE)
 620                 conv_unreadable_8bit(outbuf);
 621 }
 622
 623 static void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 624 {
 625         strncpy2(outbuf, inbuf, outlen);
 626         conv_unreadable_8bit(outbuf);
 627 }
 628
 629 void conv_localetodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 630 {
 631         gchar *tmpstr;
 632
 633         codeconv_set_strict(TRUE);
 634         tmpstr = conv_iconv_strdup(inbuf, conv_get_locale_charset_str(),
 635                                    CS_INTERNAL);
 636         codeconv_set_strict(FALSE);
 637         if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
 638                 strncpy2(outbuf, tmpstr, outlen);
 639                 g_free(tmpstr);
 640                 return;
 641         } else if (tmpstr && !g_utf8_validate(tmpstr, -1, NULL)) {
 642                 g_free(tmpstr);
 643                 codeconv_set_strict(TRUE);
 644                 tmpstr = conv_iconv_strdup(inbuf,
 645                                 conv_get_locale_charset_str_no_utf8(),
 646                                 CS_INTERNAL);
 647                 codeconv_set_strict(FALSE);
 648         }
 649         if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
 650                 strncpy2(outbuf, tmpstr, outlen);
 651                 g_free(tmpstr);
 652                 return;
 653         } else {
 654                 g_free(tmpstr);
 655                 conv_utf8todisp(outbuf, outlen, inbuf);
 656         }
 657 }
 658
 659 static void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf)
 660 {
 661         strncpy2(outbuf, inbuf, outlen);
 662 }
 663
 664 static const gchar *
 665 conv_get_fallback_for_private_encoding(const gchar *encoding)
 666 {
 667         if (encoding && (encoding[0] == 'X' || encoding[0] == 'x') &&
 668             encoding[1] == '-') {
 669                 if (!g_ascii_strcasecmp(encoding, CS_X_GBK))
 670                         return CS_GBK;
 671         }
 672
 673         return encoding;
 674 }
 675
 676 CodeConverter *conv_code_converter_new(const gchar *src_charset)
 677 {
 678         CodeConverter *conv;
 679
 680         src_charset = conv_get_fallback_for_private_encoding(src_charset);
 681
 682         conv = g_new0(CodeConverter, 1);
 683         conv->code_conv_func = conv_get_code_conv_func(src_charset, NULL);
 684         conv->charset_str = g_strdup(src_charset);
 685         conv->charset = conv_get_charset_from_str(src_charset);
 686
 687         return conv;
 688 }
 689
 690 void conv_code_converter_destroy(CodeConverter *conv)
 691 {
 692         g_free(conv->charset_str);
 693         g_free(conv);
 694 }
 695
 696 gint conv_convert(CodeConverter *conv, gchar *outbuf, gint outlen,
 697                   const gchar *inbuf)
 698 {
 699         if (conv->code_conv_func != conv_noconv)
 700                 conv->code_conv_func(outbuf, outlen, inbuf);
 701         else {
 702                 gchar *str;
 703
 704                 str = conv_iconv_strdup(inbuf, conv->charset_str, NULL);
 705                 if (!str)
 706                         return -1;
 707                 else {
 708                         strncpy2(outbuf, str, outlen);
 709                         g_free(str);
 710                 }
 711         }
 712
 713         return 0;
 714 }
 715
 716 gchar *conv_codeset_strdup(const gchar *inbuf,
 717                            const gchar *src_code, const gchar *dest_code)
 718 {
 719         gchar *buf;
 720         size_t len;
 721         CodeConvFunc conv_func;
 722
 723         if (!strcmp2(src_code, dest_code))
 724                 return g_strdup(inbuf);
 725
 726         src_code = conv_get_fallback_for_private_encoding(src_code);
 727         conv_func = conv_get_code_conv_func(src_code, dest_code);
 728         if (conv_func != conv_noconv) {
 729                 len = (strlen(inbuf) + 1) * 3;
 730                 buf = g_malloc(len);
 731                 if (!buf) return NULL;
 732
 733                 conv_func(buf, len, inbuf);
 734                 return g_realloc(buf, strlen(buf) + 1);
 735         }
 736
 737         return conv_iconv_strdup(inbuf, src_code, dest_code);
 738 }
 739
 740 static CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
 741                                      const gchar *dest_charset_str)
 742 {
 743         CodeConvFunc code_conv = conv_noconv;
 744         CharSet src_charset;
 745         CharSet dest_charset;
 746
 747         if (!src_charset_str)
 748                 src_charset = conv_get_locale_charset();
 749         else
 750                 src_charset = conv_get_charset_from_str(src_charset_str);
 751
 752         /* auto detection mode */
 753         if (!src_charset_str && !dest_charset_str) {
 754                 if (conv_is_ja_locale())
 755                         return conv_anytodisp;
 756                 else
 757                         return conv_noconv;
 758         }
 759
 760         dest_charset = conv_get_charset_from_str(dest_charset_str);
 761
 762         if (dest_charset == C_US_ASCII)
 763                 return conv_ustodisp;
 764
 765         switch (src_charset) {
 766         case C_US_ASCII:
 767         case C_ISO_8859_1:
 768         case C_ISO_8859_2:
 769         case C_ISO_8859_3:
 770         case C_ISO_8859_4:
 771         case C_ISO_8859_5:
 772         case C_ISO_8859_6:
 773         case C_ISO_8859_7:
 774         case C_ISO_8859_8:
 775         case C_ISO_8859_9:
 776         case C_ISO_8859_10:
 777         case C_ISO_8859_11:
 778         case C_ISO_8859_13:
 779         case C_ISO_8859_14:
 780         case C_ISO_8859_15:
 781                 break;
 782         case C_ISO_2022_JP:
 783         case C_ISO_2022_JP_2:
 784         case C_ISO_2022_JP_3:
 785                 if (dest_charset == C_AUTO)
 786                         code_conv = conv_jistodisp;
 787                 else if (dest_charset == C_EUC_JP)
 788                         code_conv = conv_jistoeuc;
 789                 else if (dest_charset == C_UTF_8)
 790                         code_conv = conv_jistoutf8;
 791                 break;
 792         case C_SHIFT_JIS:
 793                 if (dest_charset == C_AUTO)
 794                         code_conv = conv_sjistodisp;
 795                 else if (dest_charset == C_EUC_JP)
 796                         code_conv = conv_sjistoeuc;
 797                 else if (dest_charset == C_UTF_8)
 798                         code_conv = conv_sjistoutf8;
 799                 break;
 800         case C_EUC_JP:
 801                 if (dest_charset == C_AUTO)
 802                         code_conv = conv_euctodisp;
 803                 else if (dest_charset == C_ISO_2022_JP   ||
 804                          dest_charset == C_ISO_2022_JP_2 ||
 805                          dest_charset == C_ISO_2022_JP_3)
 806                         code_conv = conv_euctojis;
 807                 else if (dest_charset == C_UTF_8)
 808                         code_conv = conv_euctoutf8;
 809                 break;
 810         case C_UTF_8:
 811                 if (dest_charset == C_EUC_JP)
 812                         code_conv = conv_utf8toeuc;
 813                 else if (dest_charset == C_ISO_2022_JP   ||
 814                          dest_charset == C_ISO_2022_JP_2 ||
 815                          dest_charset == C_ISO_2022_JP_3)
 816                         code_conv = conv_utf8tojis;
 817                 break;
 818         default:
 819                 break;
 820         }
 821
 822         return code_conv;
 823 }
 824
 825 static gchar *conv_iconv_strdup(const gchar *inbuf,
 826                          const gchar *src_code, const gchar *dest_code)
 827 {
 828         iconv_t cd;
 829         gchar *outbuf;
 830
 831         if (!src_code && !dest_code &&
 832             g_utf8_validate(inbuf, -1, NULL))
 833                 return g_strdup(inbuf);
 834
 835         if (!src_code)
 836                 src_code = conv_get_outgoing_charset_str();
 837         if (!dest_code)
 838                 dest_code = CS_INTERNAL;
 839
 840         /* don't convert if src and dest codeset are identical */
 841         if (!strcasecmp(src_code, dest_code))
 842                 return g_strdup(inbuf);
 843
 844         /* don't convert if dest codeset is US-ASCII */
 845         if (!strcasecmp(src_code, CS_US_ASCII))
 846                 return g_strdup(inbuf);
 847
 848         /* don't convert if dest codeset is US-ASCII */
 849         if (!strcasecmp(dest_code, CS_US_ASCII))
 850                 return g_strdup(inbuf);
 851
 852         cd = iconv_open(dest_code, src_code);
 853         if (cd == (iconv_t)-1)
 854                 return NULL;
 855
 856         outbuf = conv_iconv_strdup_with_cd(inbuf, cd);
 857
 858         iconv_close(cd);
 859
 860         return outbuf;
 861 }
 862
 863 gchar *conv_iconv_strdup_with_cd(const gchar *inbuf, iconv_t cd)
 864 {
 865         const gchar *inbuf_p;
 866         gchar *outbuf;
 867         gchar *outbuf_p;
 868         size_t in_size;
 869         size_t in_left;
 870         size_t out_size;
 871         size_t out_left;
 872         size_t n_conv;
 873         size_t len;
 874
 875         inbuf_p = inbuf;
 876         in_size = strlen(inbuf);
 877         in_left = in_size;
 878         out_size = (in_size + 1) * 2;
 879         outbuf = g_malloc(out_size);
 880         outbuf_p = outbuf;
 881         out_left = out_size;
 882
 883 #define EXPAND_BUF()                            \
 884 {                                               \
 885         len = outbuf_p - outbuf;                \
 886         out_size *= 2;                          \
 887         outbuf = g_realloc(outbuf, out_size);   \
 888         outbuf_p = outbuf + len;                \
 889         out_left = out_size - len;              \
 890 }
 891
 892         while ((n_conv = iconv(cd, (ICONV_CONST gchar **)&inbuf_p, &in_left,
 893                                &outbuf_p, &out_left)) == (size_t)-1) {
 894                 if (EILSEQ == errno) {
 895                         if (strict_mode) {
 896                                 g_free(outbuf);
 897                                 return NULL;
 898                         }
 899                         //g_print("iconv(): at %d: %s\n", in_size - in_left, g_strerror(errno));
 900                         inbuf_p++;
 901                         in_left--;
 902                         if (out_left == 0) {
 903                                 EXPAND_BUF();
 904                         }
 905                         *outbuf_p++ = SUBST_CHAR;
 906                         out_left--;
 907                 } else if (EINVAL == errno) {
 908                         break;
 909                 } else if (E2BIG == errno) {
 910                         EXPAND_BUF();
 911                 } else {
 912                         g_warning("conv_iconv_strdup(): %s\n",
 913                                   g_strerror(errno));
 914                         break;
 915                 }
 916         }
 917
 918         while ((n_conv = iconv(cd, NULL, NULL, &outbuf_p, &out_left)) ==
 919                (size_t)-1) {
 920                 if (E2BIG == errno) {
 921                         EXPAND_BUF();
 922                 } else {
 923                         g_warning("conv_iconv_strdup(): %s\n",
 924                                   g_strerror(errno));
 925                         break;
 926                 }
 927         }
 928
 929 #undef EXPAND_BUF
 930
 931         len = outbuf_p - outbuf;
 932         outbuf = g_realloc(outbuf, len + 1);
 933         outbuf[len] = '\0';
 934
 935         return outbuf;
 936 }
 937
 938 static const struct {
 939         CharSet charset;
 940         gchar *const name;
 941 } charsets[] = {
 942         {C_US_ASCII,            CS_US_ASCII},
 943         {C_US_ASCII,            CS_ANSI_X3_4_1968},
 944         {C_UTF_8,               CS_UTF_8},
 945         {C_UTF_7,               CS_UTF_7},
 946         {C_ISO_8859_1,          CS_ISO_8859_1},
 947         {C_ISO_8859_2,          CS_ISO_8859_2},
 948         {C_ISO_8859_3,          CS_ISO_8859_3},
 949         {C_ISO_8859_4,          CS_ISO_8859_4},
 950         {C_ISO_8859_5,          CS_ISO_8859_5},
 951         {C_ISO_8859_6,          CS_ISO_8859_6},
 952         {C_ISO_8859_7,          CS_ISO_8859_7},
 953         {C_ISO_8859_8,          CS_ISO_8859_8},
 954         {C_ISO_8859_9,          CS_ISO_8859_9},
 955         {C_ISO_8859_10,         CS_ISO_8859_10},
 956         {C_ISO_8859_11,         CS_ISO_8859_11},
 957         {C_ISO_8859_13,         CS_ISO_8859_13},
 958         {C_ISO_8859_14,         CS_ISO_8859_14},
 959         {C_ISO_8859_15,         CS_ISO_8859_15},
 960         {C_BALTIC,              CS_BALTIC},
 961         {C_CP1250,              CS_CP1250},
 962         {C_CP1251,              CS_CP1251},
 963         {C_CP1252,              CS_CP1252},
 964         {C_CP1253,              CS_CP1253},
 965         {C_CP1254,              CS_CP1254},
 966         {C_CP1255,              CS_CP1255},
 967         {C_CP1256,              CS_CP1256},
 968         {C_CP1257,              CS_CP1257},
 969         {C_CP1258,              CS_CP1258},
 970         {C_WINDOWS_1250,        CS_WINDOWS_1250},
 971         {C_WINDOWS_1251,        CS_WINDOWS_1251},
 972         {C_WINDOWS_1252,        CS_WINDOWS_1252},
 973         {C_WINDOWS_1253,        CS_WINDOWS_1253},
 974         {C_WINDOWS_1254,        CS_WINDOWS_1254},
 975         {C_WINDOWS_1255,        CS_WINDOWS_1255},
 976         {C_WINDOWS_1256,        CS_WINDOWS_1256},
 977         {C_WINDOWS_1257,        CS_WINDOWS_1257},
 978         {C_WINDOWS_1258,        CS_WINDOWS_1258},
 979         {C_KOI8_R,              CS_KOI8_R},
 980         {C_KOI8_T,              CS_KOI8_T},
 981         {C_KOI8_U,              CS_KOI8_U},
 982         {C_ISO_2022_JP,         CS_ISO_2022_JP},
 983         {C_ISO_2022_JP_2,       CS_ISO_2022_JP_2},
 984         {C_ISO_2022_JP_3,       CS_ISO_2022_JP_3},
 985         {C_EUC_JP,              CS_EUC_JP},
 986         {C_EUC_JP,              CS_EUCJP},
 987         {C_EUC_JP_MS,           CS_EUC_JP_MS},
 988         {C_SHIFT_JIS,           CS_SHIFT_JIS},
 989         {C_SHIFT_JIS,           CS_SHIFT__JIS},
 990         {C_SHIFT_JIS,           CS_SJIS},
 991         {C_ISO_2022_KR,         CS_ISO_2022_KR},
 992         {C_EUC_KR,              CS_EUC_KR},
 993         {C_ISO_2022_CN,         CS_ISO_2022_CN},
 994         {C_EUC_CN,              CS_EUC_CN},
 995         {C_GB2312,              CS_GB2312},
 996         {C_GBK,                 CS_GBK},
 997         {C_EUC_TW,              CS_EUC_TW},
 998         {C_BIG5,                CS_BIG5},
 999         {C_BIG5_HKSCS,          CS_BIG5_HKSCS},
1000         {C_TIS_620,             CS_TIS_620},
1001         {C_WINDOWS_874,         CS_WINDOWS_874},
1002         {C_GEORGIAN_PS,         CS_GEORGIAN_PS},
1003         {C_TCVN5712_1,          CS_TCVN5712_1},
1004 };
1005
1006 static const struct {
1007         gchar *const locale;
1008         CharSet charset;
1009         CharSet out_charset;
1010 } locale_table[] = {
1011         {"ja_JP.eucJP"  , C_EUC_JP      , C_ISO_2022_JP},
1012         {"ja_JP.EUC-JP" , C_EUC_JP      , C_ISO_2022_JP},
1013         {"ja_JP.EUC"    , C_EUC_JP      , C_ISO_2022_JP},
1014         {"ja_JP.ujis"   , C_EUC_JP      , C_ISO_2022_JP},
1015         {"ja_JP.SJIS"   , C_SHIFT_JIS   , C_ISO_2022_JP},
1016         {"ja_JP.JIS"    , C_ISO_2022_JP , C_ISO_2022_JP},
1017 #ifdef G_OS_WIN32
1018         {"ja_JP"        , C_SHIFT_JIS   , C_ISO_2022_JP},
1019 #else
1020         {"ja_JP"        , C_EUC_JP      , C_ISO_2022_JP},
1021 #endif
1022         {"ko_KR.EUC-KR" , C_EUC_KR      , C_EUC_KR},
1023         {"ko_KR"        , C_EUC_KR      , C_EUC_KR},
1024         {"zh_CN.GB2312" , C_GB2312      , C_GB2312},
1025         {"zh_CN.GBK"    , C_GBK         , C_GBK},
1026         {"zh_CN"        , C_GB2312      , C_GB2312},
1027         {"zh_HK"        , C_BIG5_HKSCS  , C_BIG5_HKSCS},
1028         {"zh_TW.eucTW"  , C_EUC_TW      , C_BIG5},
1029         {"zh_TW.EUC-TW" , C_EUC_TW      , C_BIG5},
1030         {"zh_TW.Big5"   , C_BIG5        , C_BIG5},
1031         {"zh_TW"        , C_BIG5        , C_BIG5},
1032
1033         {"ru_RU.KOI8-R" , C_KOI8_R      , C_KOI8_R},
1034         {"ru_RU.KOI8R"  , C_KOI8_R      , C_KOI8_R},
1035         {"ru_RU.CP1251" , C_WINDOWS_1251, C_KOI8_R},
1036         {"ru_RU"        , C_ISO_8859_5  , C_KOI8_R},
1037         {"tg_TJ"        , C_KOI8_T      , C_KOI8_T},
1038         {"ru_UA"        , C_KOI8_U      , C_KOI8_U},
1039         {"uk_UA.CP1251" , C_WINDOWS_1251, C_KOI8_U},
1040         {"uk_UA"        , C_KOI8_U      , C_KOI8_U},
1041
1042         {"be_BY"        , C_WINDOWS_1251, C_WINDOWS_1251},
1043         {"bg_BG"        , C_WINDOWS_1251, C_WINDOWS_1251},
1044
1045         {"yi_US"        , C_WINDOWS_1255, C_WINDOWS_1255},
1046
1047         {"af_ZA"        , C_ISO_8859_1  , C_ISO_8859_1},
1048         {"br_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1049         {"ca_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1050         {"da_DK"        , C_ISO_8859_1  , C_ISO_8859_1},
1051         {"de_AT"        , C_ISO_8859_1  , C_ISO_8859_1},
1052         {"de_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1053         {"de_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1054         {"de_DE"        , C_ISO_8859_1  , C_ISO_8859_1},
1055         {"de_LU"        , C_ISO_8859_1  , C_ISO_8859_1},
1056         {"en_AU"        , C_ISO_8859_1  , C_ISO_8859_1},
1057         {"en_BW"        , C_ISO_8859_1  , C_ISO_8859_1},
1058         {"en_CA"        , C_ISO_8859_1  , C_ISO_8859_1},
1059         {"en_DK"        , C_ISO_8859_1  , C_ISO_8859_1},
1060         {"en_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1061         {"en_HK"        , C_ISO_8859_1  , C_ISO_8859_1},
1062         {"en_IE"        , C_ISO_8859_1  , C_ISO_8859_1},
1063         {"en_NZ"        , C_ISO_8859_1  , C_ISO_8859_1},
1064         {"en_PH"        , C_ISO_8859_1  , C_ISO_8859_1},
1065         {"en_SG"        , C_ISO_8859_1  , C_ISO_8859_1},
1066         {"en_US"        , C_ISO_8859_1  , C_ISO_8859_1},
1067         {"en_ZA"        , C_ISO_8859_1  , C_ISO_8859_1},
1068         {"en_ZW"        , C_ISO_8859_1  , C_ISO_8859_1},
1069         {"es_AR"        , C_ISO_8859_1  , C_ISO_8859_1},
1070         {"es_BO"        , C_ISO_8859_1  , C_ISO_8859_1},
1071         {"es_CL"        , C_ISO_8859_1  , C_ISO_8859_1},
1072         {"es_CO"        , C_ISO_8859_1  , C_ISO_8859_1},
1073         {"es_CR"        , C_ISO_8859_1  , C_ISO_8859_1},
1074         {"es_DO"        , C_ISO_8859_1  , C_ISO_8859_1},
1075         {"es_EC"        , C_ISO_8859_1  , C_ISO_8859_1},
1076         {"es_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1077         {"es_GT"        , C_ISO_8859_1  , C_ISO_8859_1},
1078         {"es_HN"        , C_ISO_8859_1  , C_ISO_8859_1},
1079         {"es_MX"        , C_ISO_8859_1  , C_ISO_8859_1},
1080         {"es_NI"        , C_ISO_8859_1  , C_ISO_8859_1},
1081         {"es_PA"        , C_ISO_8859_1  , C_ISO_8859_1},
1082         {"es_PE"        , C_ISO_8859_1  , C_ISO_8859_1},
1083         {"es_PR"        , C_ISO_8859_1  , C_ISO_8859_1},
1084         {"es_PY"        , C_ISO_8859_1  , C_ISO_8859_1},
1085         {"es_SV"        , C_ISO_8859_1  , C_ISO_8859_1},
1086         {"es_US"        , C_ISO_8859_1  , C_ISO_8859_1},
1087         {"es_UY"        , C_ISO_8859_1  , C_ISO_8859_1},
1088         {"es_VE"        , C_ISO_8859_1  , C_ISO_8859_1},
1089         {"et_EE"        , C_ISO_8859_1  , C_ISO_8859_1},
1090         {"eu_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1091         {"fi_FI"        , C_ISO_8859_1  , C_ISO_8859_1},
1092         {"fo_FO"        , C_ISO_8859_1  , C_ISO_8859_1},
1093         {"fr_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1094         {"fr_CA"        , C_ISO_8859_1  , C_ISO_8859_1},
1095         {"fr_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1096         {"fr_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1097         {"fr_LU"        , C_ISO_8859_1  , C_ISO_8859_1},
1098         {"ga_IE"        , C_ISO_8859_1  , C_ISO_8859_1},
1099         {"gl_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1100         {"gv_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1101         {"id_ID"        , C_ISO_8859_1  , C_ISO_8859_1},
1102         {"is_IS"        , C_ISO_8859_1  , C_ISO_8859_1},
1103         {"it_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1104         {"it_IT"        , C_ISO_8859_1  , C_ISO_8859_1},
1105         {"kl_GL"        , C_ISO_8859_1  , C_ISO_8859_1},
1106         {"kw_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1107         {"ms_MY"        , C_ISO_8859_1  , C_ISO_8859_1},
1108         {"nl_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1109         {"nl_NL"        , C_ISO_8859_1  , C_ISO_8859_1},
1110         {"nb_NO",       , C_ISO_8859_1  , C_ISO_8859_1},
1111         {"nn_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1112         {"no_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1113         {"oc_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1114         {"pt_BR"        , C_ISO_8859_1  , C_ISO_8859_1},
1115         {"pt_PT"        , C_ISO_8859_1  , C_ISO_8859_1},
1116         {"sq_AL"        , C_ISO_8859_1  , C_ISO_8859_1},
1117         {"sv_FI"        , C_ISO_8859_1  , C_ISO_8859_1},
1118         {"sv_SE"        , C_ISO_8859_1  , C_ISO_8859_1},
1119         {"tl_PH"        , C_ISO_8859_1  , C_ISO_8859_1},
1120         {"uz_UZ"        , C_ISO_8859_1  , C_ISO_8859_1},
1121         {"wa_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1122
1123         {"bs_BA"        , C_ISO_8859_2  , C_ISO_8859_2},
1124         {"cs_CZ"        , C_ISO_8859_2  , C_ISO_8859_2},
1125         {"hr_HR"        , C_ISO_8859_2  , C_ISO_8859_2},
1126         {"hu_HU"        , C_ISO_8859_2  , C_ISO_8859_2},
1127         {"pl_PL"        , C_ISO_8859_2  , C_ISO_8859_2},
1128         {"ro_RO"        , C_ISO_8859_2  , C_ISO_8859_2},
1129         {"sk_SK"        , C_ISO_8859_2  , C_ISO_8859_2},
1130         {"sl_SI"        , C_ISO_8859_2  , C_ISO_8859_2},
1131
1132         {"sr_YU@cyrillic"       , C_ISO_8859_5  , C_ISO_8859_5},
1133         {"sr_YU"                , C_ISO_8859_2  , C_ISO_8859_2},
1134
1135         {"mt_MT"                , C_ISO_8859_3  , C_ISO_8859_3},
1136
1137         {"lt_LT.iso88594"       , C_ISO_8859_4  , C_ISO_8859_4},
1138         {"lt_LT.ISO8859-4"      , C_ISO_8859_4  , C_ISO_8859_4},
1139         {"lt_LT.ISO_8859-4"     , C_ISO_8859_4  , C_ISO_8859_4},
1140         {"lt_LT"                , C_ISO_8859_13 , C_ISO_8859_13},
1141
1142         {"mk_MK"        , C_ISO_8859_5  , C_ISO_8859_5},
1143
1144         {"ar_AE"        , C_ISO_8859_6  , C_ISO_8859_6},
1145         {"ar_BH"        , C_ISO_8859_6  , C_ISO_8859_6},
1146         {"ar_DZ"        , C_ISO_8859_6  , C_ISO_8859_6},
1147         {"ar_EG"        , C_ISO_8859_6  , C_ISO_8859_6},
1148         {"ar_IQ"        , C_ISO_8859_6  , C_ISO_8859_6},
1149         {"ar_JO"        , C_ISO_8859_6  , C_ISO_8859_6},
1150         {"ar_KW"        , C_ISO_8859_6  , C_ISO_8859_6},
1151         {"ar_LB"        , C_ISO_8859_6  , C_ISO_8859_6},
1152         {"ar_LY"        , C_ISO_8859_6  , C_ISO_8859_6},
1153         {"ar_MA"        , C_ISO_8859_6  , C_ISO_8859_6},
1154         {"ar_OM"        , C_ISO_8859_6  , C_ISO_8859_6},
1155         {"ar_QA"        , C_ISO_8859_6  , C_ISO_8859_6},
1156         {"ar_SA"        , C_ISO_8859_6  , C_ISO_8859_6},
1157         {"ar_SD"        , C_ISO_8859_6  , C_ISO_8859_6},
1158         {"ar_SY"        , C_ISO_8859_6  , C_ISO_8859_6},
1159         {"ar_TN"        , C_ISO_8859_6  , C_ISO_8859_6},
1160         {"ar_YE"        , C_ISO_8859_6  , C_ISO_8859_6},
1161
1162         {"el_GR"        , C_ISO_8859_7  , C_ISO_8859_7},
1163         {"he_IL"        , C_ISO_8859_8  , C_ISO_8859_8},
1164         {"iw_IL"        , C_ISO_8859_8  , C_ISO_8859_8},
1165         {"tr_TR"        , C_ISO_8859_9  , C_ISO_8859_9},
1166
1167         {"lv_LV"        , C_ISO_8859_13 , C_ISO_8859_13},
1168         {"mi_NZ"        , C_ISO_8859_13 , C_ISO_8859_13},
1169
1170         {"cy_GB"        , C_ISO_8859_14 , C_ISO_8859_14},
1171
1172         {"ar_IN"        , C_UTF_8       , C_UTF_8},
1173         {"en_IN"        , C_UTF_8       , C_UTF_8},
1174         {"se_NO"        , C_UTF_8       , C_UTF_8},
1175         {"ta_IN"        , C_UTF_8       , C_UTF_8},
1176         {"te_IN"        , C_UTF_8       , C_UTF_8},
1177         {"ur_PK"        , C_UTF_8       , C_UTF_8},
1178
1179         {"th_TH"        , C_TIS_620     , C_TIS_620},
1180         /* {"th_TH"     , C_WINDOWS_874}, */
1181         /* {"th_TH"     , C_ISO_8859_11}, */
1182
1183         {"ka_GE"        , C_GEORGIAN_PS , C_GEORGIAN_PS},
1184         {"vi_VN.TCVN"   , C_TCVN5712_1  , C_TCVN5712_1},
1185
1186         {"C"                    , C_US_ASCII    , C_US_ASCII},
1187         {"POSIX"                , C_US_ASCII    , C_US_ASCII},
1188         {"ANSI_X3.4-1968"       , C_US_ASCII    , C_US_ASCII},
1189 };
1190
1191 static GHashTable *conv_get_charset_to_str_table(void)
1192 {
1193         static GHashTable *table;
1194         gint i;
1195
1196         if (table)
1197                 return table;
1198
1199         table = g_hash_table_new(NULL, g_direct_equal);
1200
1201         for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1202                 if (g_hash_table_lookup(table, GUINT_TO_POINTER(charsets[i].charset))
1203                     == NULL) {
1204                         g_hash_table_insert
1205                                 (table, GUINT_TO_POINTER(charsets[i].charset),
1206                                  charsets[i].name);
1207                 }
1208         }
1209
1210         return table;
1211 }
1212
1213 static GHashTable *conv_get_charset_from_str_table(void)
1214 {
1215         static GHashTable *table;
1216         gint i;
1217
1218         if (table)
1219                 return table;
1220
1221         table = g_hash_table_new(str_case_hash, str_case_equal);
1222
1223         for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1224                 g_hash_table_insert(table, charsets[i].name,
1225                                     GUINT_TO_POINTER(charsets[i].charset));
1226         }
1227
1228         return table;
1229 }
1230
1231 const gchar *conv_get_charset_str(CharSet charset)
1232 {
1233         GHashTable *table;
1234
1235         table = conv_get_charset_to_str_table();
1236         return g_hash_table_lookup(table, GUINT_TO_POINTER(charset));
1237 }
1238
1239 CharSet conv_get_charset_from_str(const gchar *charset)
1240 {
1241         GHashTable *table;
1242
1243         if (!charset) return C_AUTO;
1244
1245         table = conv_get_charset_from_str_table();
1246         return GPOINTER_TO_UINT(g_hash_table_lookup(table, charset));
1247 }
1248
1249 static CharSet conv_get_locale_charset(void)
1250 {
1251         static CharSet cur_charset = -1;
1252         const gchar *cur_locale;
1253         const gchar *p;
1254         gint i;
1255
1256         if (cur_charset != -1)
1257                 return cur_charset;
1258
1259         cur_locale = conv_get_current_locale();
1260         if (!cur_locale) {
1261                 cur_charset = C_US_ASCII;
1262                 return cur_charset;
1263         }
1264
1265         if (strcasestr(cur_locale, ".UTF-8") ||
1266             strcasestr(cur_locale, ".utf8")) {
1267                 cur_charset = C_UTF_8;
1268                 return cur_charset;
1269         }
1270
1271         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1272                 cur_charset = C_ISO_8859_15;
1273                 return cur_charset;
1274         }
1275
1276         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1277                 const gchar *p;
1278
1279                 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1280                    "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1281                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1282                                  strlen(locale_table[i].locale))) {
1283                         cur_charset = locale_table[i].charset;
1284                         return cur_charset;
1285                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1286                          !strchr(p + 1, '.')) {
1287                         if (strlen(cur_locale) == 2 &&
1288                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1289                                 cur_charset = locale_table[i].charset;
1290                                 return cur_charset;
1291                         }
1292                 }
1293         }
1294
1295         cur_charset = C_AUTO;
1296         return cur_charset;
1297 }
1298
1299 static CharSet conv_get_locale_charset_no_utf8(void)
1300 {
1301         static CharSet cur_charset = -1;
1302         const gchar *cur_locale;
1303         const gchar *p;
1304         gchar *tmp;
1305         gint i;
1306
1307         if (prefs_common.broken_are_utf8)
1308                 return conv_get_locale_charset();
1309
1310         if (cur_charset != -1)
1311                 return cur_charset;
1312
1313         cur_locale = conv_get_current_locale();
1314         if (!cur_locale) {
1315                 cur_charset = C_US_ASCII;
1316                 return cur_charset;
1317         }
1318
1319         if (strcasestr(cur_locale, "UTF-8")) {
1320                 tmp = g_strdup(cur_locale);
1321                 *(strcasestr(tmp, ".UTF-8")) = '\0';
1322                 cur_locale = tmp;
1323         }
1324
1325         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1326                 cur_charset = C_ISO_8859_15;
1327                 return cur_charset;
1328         }
1329
1330         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1331                 const gchar *p;
1332
1333                 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1334                    "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1335                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1336                                  strlen(locale_table[i].locale))) {
1337                         cur_charset = locale_table[i].charset;
1338                         return cur_charset;
1339                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1340                          !strchr(p + 1, '.')) {
1341                         if (strlen(cur_locale) == 2 &&
1342                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1343                                 cur_charset = locale_table[i].charset;
1344                                 return cur_charset;
1345                         }
1346                 }
1347         }
1348
1349         cur_charset = C_AUTO;
1350         return cur_charset;
1351 }
1352
1353 const gchar *conv_get_locale_charset_str(void)
1354 {
1355         static const gchar *codeset = NULL;
1356
1357         if (!codeset)
1358                 codeset = conv_get_charset_str(conv_get_locale_charset());
1359
1360         return codeset ? codeset : CS_INTERNAL;
1361 }
1362
1363 const gchar *conv_get_locale_charset_str_no_utf8(void)
1364 {
1365         static const gchar *codeset = NULL;
1366
1367         if (!codeset)
1368                 codeset = conv_get_charset_str(conv_get_locale_charset_no_utf8());
1369
1370         return codeset ? codeset : CS_INTERNAL;
1371 }
1372
1373 static CharSet conv_get_outgoing_charset(void)
1374 {
1375         static CharSet out_charset = -1;
1376         const gchar *cur_locale;
1377         const gchar *p;
1378         gint i;
1379
1380         if (out_charset != -1)
1381                 return out_charset;
1382
1383         cur_locale = conv_get_current_locale();
1384         if (!cur_locale) {
1385                 out_charset = C_AUTO;
1386                 return out_charset;
1387         }
1388
1389         if (strcasestr(cur_locale, "UTF-8")) {
1390                 out_charset = C_UTF_8;
1391                 return out_charset;
1392         }
1393
1394         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1395                 out_charset = C_ISO_8859_15;
1396                 return out_charset;
1397         }
1398
1399         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1400                 const gchar *p;
1401
1402                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1403                                  strlen(locale_table[i].locale))) {
1404                         out_charset = locale_table[i].out_charset;
1405                         break;
1406                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1407                          !strchr(p + 1, '.')) {
1408                         if (strlen(cur_locale) == 2 &&
1409                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1410                                 out_charset = locale_table[i].out_charset;
1411                                 break;
1412                         }
1413                 }
1414         }
1415
1416         return out_charset;
1417 }
1418
1419 const gchar *conv_get_outgoing_charset_str(void)
1420 {
1421         CharSet out_charset;
1422         const gchar *str;
1423
1424         out_charset = conv_get_outgoing_charset();
1425         str = conv_get_charset_str(out_charset);
1426
1427         return str ? str : CS_UTF_8;
1428 }
1429
1430 const gchar *conv_get_current_locale(void)
1431 {
1432         const gchar *cur_locale;
1433
1434 #ifdef G_OS_WIN32
1435         cur_locale = g_win32_getlocale();
1436 #else
1437         cur_locale = g_getenv("LC_ALL");
1438         if (!cur_locale) cur_locale = g_getenv("LC_CTYPE");
1439         if (!cur_locale) cur_locale = g_getenv("LANG");
1440         if (!cur_locale) cur_locale = setlocale(LC_CTYPE, NULL);
1441 #endif /* G_OS_WIN32 */
1442
1443         debug_print("current locale: %s\n",
1444                     cur_locale ? cur_locale : "(none)");
1445
1446         return cur_locale;
1447 }
1448
1449 static gboolean conv_is_ja_locale(void)
1450 {
1451         static gint is_ja_locale = -1;
1452         const gchar *cur_locale;
1453
1454         if (is_ja_locale != -1)
1455                 return is_ja_locale != 0;
1456
1457         is_ja_locale = 0;
1458         cur_locale = conv_get_current_locale();
1459         if (cur_locale) {
1460                 if (g_ascii_strncasecmp(cur_locale, "ja", 2) == 0)
1461                         is_ja_locale = 1;
1462         }
1463
1464         return is_ja_locale != 0;
1465 }
1466
1467 gchar *conv_unmime_header(const gchar *str, const gchar *default_encoding)
1468 {
1469         gchar buf[BUFFSIZE];
1470
1471         if (is_ascii_str(str))
1472                 return unmime_header(str);
1473
1474         if (default_encoding) {
1475                 gchar *utf8_buf;
1476
1477                 utf8_buf = conv_codeset_strdup
1478                         (str, default_encoding, CS_INTERNAL);
1479                 if (utf8_buf) {
1480                         gchar *decoded_str;
1481
1482                         decoded_str = unmime_header(utf8_buf);
1483                         g_free(utf8_buf);
1484                         return decoded_str;
1485                 }
1486         }
1487
1488         if (conv_is_ja_locale())
1489                 conv_anytodisp(buf, sizeof(buf), str);
1490         else
1491                 conv_localetodisp(buf, sizeof(buf), str);
1492
1493         return unmime_header(buf);
1494 }
1495
1496 #define MAX_LINELEN             76
1497 #define MAX_HARD_LINELEN        996
1498 #define MIMESEP_BEGIN           "=?"
1499 #define MIMESEP_END             "?="
1500
1501 #define LBREAK_IF_REQUIRED(cond, is_plain_text)                         \
1502 {                                                                       \
1503         if (len - (destp - (guchar *)dest) < MAX_LINELEN + 2) {         \
1504                 *destp = '\0';                                          \
1505                 return;                                                 \
1506         }                                                               \
1507                                                                         \
1508         if ((cond) && *srcp) {                                          \
1509                 if (destp > (guchar *)dest && left < MAX_LINELEN - 1) { \
1510                         if (isspace(*(destp - 1)))                      \
1511                                 destp--;                                \
1512                         else if (is_plain_text && isspace(*srcp))       \
1513                                 srcp++;                                 \
1514                         if (*srcp) {                                    \
1515                                 *destp++ = '\n';                        \
1516                                 *destp++ = ' ';                         \
1517                                 left = MAX_LINELEN - 1;                 \
1518                         }                                               \
1519                 }                                                       \
1520         }                                                               \
1521 }
1522
1523 void conv_encode_header_full(gchar *dest, gint len, const gchar *src,
1524                         gint header_len, gboolean addr_field,
1525                         const gchar *out_encoding_)
1526 {
1527         const gchar *cur_encoding;
1528         const gchar *out_encoding;
1529         gint mimestr_len;
1530         gchar *mimesep_enc;
1531         gint left;
1532         const guchar *srcp = src;
1533         guchar *destp = dest;
1534         gboolean use_base64;
1535
1536         g_return_if_fail(g_utf8_validate(src, -1, NULL) == TRUE);
1537
1538         if (MB_CUR_MAX > 1) {
1539                 use_base64 = TRUE;
1540                 mimesep_enc = "?B?";
1541         } else {
1542                 use_base64 = FALSE;
1543                 mimesep_enc = "?Q?";
1544         }
1545
1546         cur_encoding = CS_INTERNAL;
1547
1548         if (out_encoding_)
1549                 out_encoding = out_encoding_;
1550         else
1551                 out_encoding = conv_get_outgoing_charset_str();
1552
1553         if (!strcmp(out_encoding, CS_US_ASCII))
1554                 out_encoding = CS_ISO_8859_1;
1555
1556         mimestr_len = strlen(MIMESEP_BEGIN) + strlen(out_encoding) +
1557                 strlen(mimesep_enc) + strlen(MIMESEP_END);
1558
1559         left = MAX_LINELEN - header_len;
1560
1561         while (*srcp) {
1562                 LBREAK_IF_REQUIRED(left <= 0, TRUE);
1563
1564                 while (isspace(*srcp)) {
1565                         *destp++ = *srcp++;
1566                         left--;
1567                         LBREAK_IF_REQUIRED(left <= 0, TRUE);
1568                 }
1569
1570                 /* output as it is if the next word is ASCII string */
1571                 if (!is_next_nonascii(srcp)) {
1572                         gint word_len;
1573
1574                         word_len = get_next_word_len(srcp);
1575                         LBREAK_IF_REQUIRED(left < word_len, TRUE);
1576                         while (word_len > 0) {
1577                                 LBREAK_IF_REQUIRED(left + (MAX_HARD_LINELEN - MAX_LINELEN) <= 0, TRUE)
1578                                 *destp++ = *srcp++;
1579                                 left--;
1580                                 word_len--;
1581                         }
1582
1583                         continue;
1584                 }
1585
1586                 /* don't include parentheses and quotes in encoded strings */
1587                 if (addr_field && (*srcp == '(' || *srcp == ')' || *srcp == '"')) {
1588                         LBREAK_IF_REQUIRED(left < 2, FALSE);
1589                         *destp++ = *srcp++;
1590                         left--;
1591                 }
1592
1593                 while (1) {
1594                         gint mb_len = 0;
1595                         gint cur_len = 0;
1596                         gchar *part_str;
1597                         gchar *out_str;
1598                         gchar *enc_str;
1599                         const guchar *p = srcp;
1600                         gint out_str_len;
1601                         gint out_enc_str_len;
1602                         gint mime_block_len;
1603                         gboolean cont = FALSE;
1604
1605                         while (*p != '\0') {
1606                                 if (isspace(*p) && !is_next_nonascii(p + 1))
1607                                         break;
1608                                 /* don't include parentheses in encoded
1609                                    strings */
1610                                 if (addr_field && (*p == '(' || *p == ')' || *p == '"'))
1611                                         break;
1612
1613                                 mb_len = g_utf8_skip[*p];
1614
1615                                 Xstrndup_a(part_str, srcp, cur_len + mb_len, );
1616                                 out_str = conv_codeset_strdup
1617                                         (part_str, cur_encoding, out_encoding);
1618                                 if (!out_str) {
1619                                         if (strict_mode) {
1620                                                 *dest = '\0';
1621                                                 return;
1622                                         } else {
1623                                                 g_warning("conv_encode_header(): code conversion failed\n");
1624                                                 conv_unreadable_8bit(part_str);
1625                                                 out_str = g_strdup(part_str);
1626                                         }
1627                                 }
1628                                 out_str_len = strlen(out_str);
1629
1630                                 if (use_base64)
1631                                         out_enc_str_len = B64LEN(out_str_len);
1632                                 else
1633                                         out_enc_str_len =
1634                                                 qp_get_q_encoding_len(out_str);
1635
1636                                 g_free(out_str);
1637
1638                                 if (mimestr_len + out_enc_str_len <= left) {
1639                                         cur_len += mb_len;
1640                                         p += mb_len;
1641                                 } else if (cur_len == 0) {
1642                                         LBREAK_IF_REQUIRED(1, FALSE);
1643                                         continue;
1644                                 } else {
1645                                         cont = TRUE;
1646                                         break;
1647                                 }
1648                         }
1649
1650                         if (cur_len > 0) {
1651                                 Xstrndup_a(part_str, srcp, cur_len, );
1652                                 out_str = conv_codeset_strdup
1653                                         (part_str, cur_encoding, out_encoding);
1654                                 if (!out_str) {
1655                                         g_warning("conv_encode_header(): code conversion failed\n");
1656                                         conv_unreadable_8bit(part_str);
1657                                         out_str = g_strdup(part_str);
1658                                 }
1659                                 out_str_len = strlen(out_str);
1660
1661                                 if (use_base64)
1662                                         out_enc_str_len = B64LEN(out_str_len);
1663                                 else
1664                                         out_enc_str_len =
1665                                                 qp_get_q_encoding_len(out_str);
1666
1667                                 Xalloca(enc_str, out_enc_str_len + 1, );
1668                                 if (use_base64)
1669                                         base64_encode(enc_str, out_str, out_str_len);
1670                                 else
1671                                         qp_q_encode(enc_str, out_str);
1672
1673                                 g_free(out_str);
1674
1675                                 /* output MIME-encoded string block */
1676                                 mime_block_len = mimestr_len + strlen(enc_str);
1677                                 g_snprintf(destp, mime_block_len + 1,
1678                                            MIMESEP_BEGIN "%s%s%s" MIMESEP_END,
1679                                            out_encoding, mimesep_enc, enc_str);
1680                                 destp += mime_block_len;
1681                                 srcp += cur_len;
1682
1683                                 left -= mime_block_len;
1684                         }
1685
1686                         LBREAK_IF_REQUIRED(cont, FALSE);
1687
1688                         if (cur_len == 0)
1689                                 break;
1690                 }
1691         }
1692
1693         *destp = '\0';
1694 }
1695
1696 void conv_encode_header(gchar *dest, gint len, const gchar *src,
1697                         gint header_len, gboolean addr_field)
1698 {
1699         conv_encode_header_full(dest,len,src,header_len,addr_field,NULL);
1700 }
1701
1702 #undef LBREAK_IF_REQUIRED
1703 gchar *conv_filename_from_utf8(const gchar *utf8_file)
1704 {
1705         gchar *fs_file;
1706         GError *error = NULL;
1707
1708         fs_file = g_filename_from_utf8(utf8_file, -1, NULL, NULL, &error);
1709         if (error) {
1710                 g_warning("failed to convert encoding of file name: %s\n",
1711                           error->message);
1712                 g_error_free(error);
1713         }
1714         if (!fs_file)
1715                 fs_file = g_strdup(utf8_file);
1716
1717         return fs_file;
1718 }
1719
1720 gchar *conv_filename_to_utf8(const gchar *fs_file)
1721 {
1722         gchar *utf8_file = NULL;
1723         GError *error = NULL;
1724
1725         utf8_file = g_filename_to_utf8(fs_file, -1, NULL, NULL, &error);
1726         if (error) {
1727                 g_warning("failed to convert encoding of file name: %s\n",
1728                           error->message);
1729                 g_error_free(error);
1730         }
1731
1732         if (!utf8_file || !g_utf8_validate(utf8_file, -1, NULL)) {
1733                 g_free(utf8_file);
1734                 utf8_file = g_strdup(fs_file);
1735                 conv_unreadable_8bit(utf8_file);
1736         }
1737
1738         return utf8_file;
1739 }