src/codeconv.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2005 Hiroyuki Yamamoto
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  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 <iconv.h>
  38
  39 #include "codeconv.h"
  40 #include "unmime.h"
  41 #include "base64.h"
  42 #include "quoted-printable.h"
  43 #include "utils.h"
  44 #include "prefs_common.h"
  45
  46 typedef enum
  47 {
  48         JIS_ASCII,
  49         JIS_KANJI,
  50         JIS_HWKANA,
  51         JIS_AUXKANJI
  52 } JISState;
  53
  54 #define SUBST_CHAR      0x5f;
  55 #define ESC             '\033'
  56
  57 #define iseuckanji(c) \
  58         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xfe)
  59 #define iseuchwkana1(c) \
  60         (((c) & 0xff) == 0x8e)
  61 #define iseuchwkana2(c) \
  62         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
  63 #define iseucaux(c) \
  64         (((c) & 0xff) == 0x8f)
  65 #define issjiskanji1(c) \
  66         ((((c) & 0xff) >= 0x81 && ((c) & 0xff) <= 0x9f) || \
  67          (((c) & 0xff) >= 0xe0 && ((c) & 0xff) <= 0xfc))
  68 #define issjiskanji2(c) \
  69         ((((c) & 0xff) >= 0x40 && ((c) & 0xff) <= 0x7e) || \
  70          (((c) & 0xff) >= 0x80 && ((c) & 0xff) <= 0xfc))
  71 #define issjishwkana(c) \
  72         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
  73
  74 #define K_IN()                          \
  75         if (state != JIS_KANJI) {       \
  76                 *out++ = ESC;           \
  77                 *out++ = '$';           \
  78                 *out++ = 'B';           \
  79                 state = JIS_KANJI;      \
  80         }
  81
  82 #define K_OUT()                         \
  83         if (state != JIS_ASCII) {       \
  84                 *out++ = ESC;           \
  85                 *out++ = '(';           \
  86                 *out++ = 'B';           \
  87                 state = JIS_ASCII;      \
  88         }
  89
  90 #define HW_IN()                         \
  91         if (state != JIS_HWKANA) {      \
  92                 *out++ = ESC;           \
  93                 *out++ = '(';           \
  94                 *out++ = 'I';           \
  95                 state = JIS_HWKANA;     \
  96         }
  97
  98 #define AUX_IN()                        \
  99         if (state != JIS_AUXKANJI) {    \
 100                 *out++ = ESC;           \
 101                 *out++ = '$';           \
 102                 *out++ = '(';           \
 103                 *out++ = 'D';           \
 104                 state = JIS_AUXKANJI;   \
 105         }
 106
 107 static void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 108 static void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf);
 109 static void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 110
 111 static void conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 112 static void conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 113 static void conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 114 static void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 115
 116 static void conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 117 static void conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf);
 118
 119 static void conv_unreadable_8bit(gchar *str);
 120
 121 static void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 122 static void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 123 static void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 124
 125 static void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 126 static void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 127 static void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf);
 128
 129 static gboolean strict_mode = FALSE;
 130
 131 void codeconv_set_strict(gboolean mode)
 132 {
 133         strict_mode = mode;
 134 }
 135
 136 static void conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 137 {
 138         const guchar *in = inbuf;
 139         guchar *out = outbuf;
 140         JISState state = JIS_ASCII;
 141
 142         while (*in != '\0') {
 143                 if (*in == ESC) {
 144                         in++;
 145                         if (*in == '$') {
 146                                 if (*(in + 1) == '@' || *(in + 1) == 'B') {
 147                                         state = JIS_KANJI;
 148                                         in += 2;
 149                                 } else if (*(in + 1) == '(' &&
 150                                            *(in + 2) == 'D') {
 151                                         state = JIS_AUXKANJI;
 152                                         in += 3;
 153                                 } else {
 154                                         /* unknown escape sequence */
 155                                         state = JIS_ASCII;
 156                                 }
 157                         } else if (*in == '(') {
 158                                 if (*(in + 1) == 'B' || *(in + 1) == 'J') {
 159                                         state = JIS_ASCII;
 160                                         in += 2;
 161                                 } else if (*(in + 1) == 'I') {
 162                                         state = JIS_HWKANA;
 163                                         in += 2;
 164                                 } else {
 165                                         /* unknown escape sequence */
 166                                         state = JIS_ASCII;
 167                                 }
 168                         } else {
 169                                 /* unknown escape sequence */
 170                                 state = JIS_ASCII;
 171                         }
 172                 } else if (*in == 0x0e) {
 173                         state = JIS_HWKANA;
 174                         in++;
 175                 } else if (*in == 0x0f) {
 176                         state = JIS_ASCII;
 177                         in++;
 178                 } else {
 179                         switch (state) {
 180                         case JIS_ASCII:
 181                                 *out++ = *in++;
 182                                 break;
 183                         case JIS_KANJI:
 184                                 *out++ = *in++ | 0x80;
 185                                 if (*in == '\0') break;
 186                                 *out++ = *in++ | 0x80;
 187                                 break;
 188                         case JIS_HWKANA:
 189                                 *out++ = 0x8e;
 190                                 *out++ = *in++ | 0x80;
 191                                 break;
 192                         case JIS_AUXKANJI:
 193                                 *out++ = 0x8f;
 194                                 *out++ = *in++ | 0x80;
 195                                 if (*in == '\0') break;
 196                                 *out++ = *in++ | 0x80;
 197                                 break;
 198                         }
 199                 }
 200         }
 201
 202         *out = '\0';
 203 }
 204
 205 #define JIS_HWDAKUTEN           0x5e
 206 #define JIS_HWHANDAKUTEN        0x5f
 207
 208 static gint conv_jis_hantozen(guchar *outbuf, guchar jis_code, guchar sound_sym)
 209 {
 210         static guint16 h2z_tbl[] = {
 211                 /* 0x20 - 0x2f */
 212                 0x0000, 0x2123, 0x2156, 0x2157, 0x2122, 0x2126, 0x2572, 0x2521,
 213                 0x2523, 0x2525, 0x2527, 0x2529, 0x2563, 0x2565, 0x2567, 0x2543,
 214                 /* 0x30 - 0x3f */
 215                 0x213c, 0x2522, 0x2524, 0x2526, 0x2528, 0x252a, 0x252b, 0x252d,
 216                 0x252f, 0x2531, 0x2533, 0x2535, 0x2537, 0x2539, 0x253b, 0x253d,
 217                 /* 0x40 - 0x4f */
 218                 0x253f, 0x2541, 0x2544, 0x2546, 0x2548, 0x254a, 0x254b, 0x254c,
 219                 0x254d, 0x254e, 0x254f, 0x2552, 0x2555, 0x2558, 0x255b, 0x255e,
 220                 /* 0x50 - 0x5f */
 221                 0x255f, 0x2560, 0x2561, 0x2562, 0x2564, 0x2566, 0x2568, 0x2569,
 222                 0x256a, 0x256b, 0x256c, 0x256d, 0x256f, 0x2573, 0x212b, 0x212c
 223         };
 224
 225         static guint16 dakuten_tbl[] = {
 226                 /* 0x30 - 0x3f */
 227                 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x252c, 0x252e,
 228                 0x2530, 0x2532, 0x2534, 0x2536, 0x2538, 0x253a, 0x253c, 0x253e,
 229                 /* 0x40 - 0x4f */
 230                 0x2540, 0x2542, 0x2545, 0x2547, 0x2549, 0x0000, 0x0000, 0x0000,
 231                 0x0000, 0x0000, 0x2550, 0x2553, 0x2556, 0x2559, 0x255c, 0x0000
 232         };
 233
 234         static guint16 handakuten_tbl[] = {
 235                 /* 0x4a - 0x4e */
 236                 0x2551, 0x2554, 0x2557, 0x255a, 0x255d
 237         };
 238
 239         guint16 out_code;
 240
 241         jis_code &= 0x7f;
 242         sound_sym &= 0x7f;
 243
 244         if (jis_code < 0x21 || jis_code > 0x5f)
 245                 return 0;
 246
 247         if (sound_sym == JIS_HWDAKUTEN &&
 248             jis_code >= 0x36 && jis_code <= 0x4e) {
 249                 out_code = dakuten_tbl[jis_code - 0x30];
 250                 if (out_code != 0) {
 251                         *outbuf = out_code >> 8;
 252                         *(outbuf + 1) = out_code & 0xff;
 253                         return 2;
 254                 }
 255         }
 256
 257         if (sound_sym == JIS_HWHANDAKUTEN &&
 258             jis_code >= 0x4a && jis_code <= 0x4e) {
 259                 out_code = handakuten_tbl[jis_code - 0x4a];
 260                 *outbuf = out_code >> 8;
 261                 *(outbuf + 1) = out_code & 0xff;
 262                 return 2;
 263         }
 264
 265         out_code = h2z_tbl[jis_code - 0x20];
 266         *outbuf = out_code >> 8;
 267         *(outbuf + 1) = out_code & 0xff;
 268         return 1;
 269 }
 270
 271 static void conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 272 {
 273         const guchar *in = inbuf;
 274         guchar *out = outbuf;
 275         JISState state = JIS_ASCII;
 276
 277         while (*in != '\0') {
 278                 if (IS_ASCII(*in)) {
 279                         K_OUT();
 280                         *out++ = *in++;
 281                 } else if (iseuckanji(*in)) {
 282                         if (iseuckanji(*(in + 1))) {
 283                                 K_IN();
 284                                 *out++ = *in++ & 0x7f;
 285                                 *out++ = *in++ & 0x7f;
 286                         } else {
 287                                 K_OUT();
 288                                 *out++ = SUBST_CHAR;
 289                                 in++;
 290                                 if (*in != '\0' && !IS_ASCII(*in)) {
 291                                         *out++ = SUBST_CHAR;
 292                                         in++;
 293                                 }
 294                         }
 295                 } else if (iseuchwkana1(*in)) {
 296                         if (iseuchwkana2(*(in + 1))) {
 297                                 if (prefs_common.allow_jisx0201_kana) {
 298                                         HW_IN();
 299                                         in++;
 300                                         *out++ = *in++ & 0x7f;
 301                                 } else {
 302                                         guchar jis_ch[2];
 303                                         gint len;
 304
 305                                         if (iseuchwkana1(*(in + 2)) &&
 306                                             iseuchwkana2(*(in + 3)))
 307                                                 len = conv_jis_hantozen
 308                                                         (jis_ch,
 309                                                          *(in + 1), *(in + 3));
 310                                         else
 311                                                 len = conv_jis_hantozen
 312                                                         (jis_ch,
 313                                                          *(in + 1), '\0');
 314                                         if (len == 0)
 315                                                 in += 2;
 316                                         else {
 317                                                 K_IN();
 318                                                 in += len * 2;
 319                                                 *out++ = jis_ch[0];
 320                                                 *out++ = jis_ch[1];
 321                                         }
 322                                 }
 323                         } else {
 324                                 K_OUT();
 325                                 in++;
 326                                 if (*in != '\0' && !IS_ASCII(*in)) {
 327                                         *out++ = SUBST_CHAR;
 328                                         in++;
 329                                 }
 330                         }
 331                 } else if (iseucaux(*in)) {
 332                         in++;
 333                         if (iseuckanji(*in) && iseuckanji(*(in + 1))) {
 334                                 AUX_IN();
 335                                 *out++ = *in++ & 0x7f;
 336                                 *out++ = *in++ & 0x7f;
 337                         } else {
 338                                 K_OUT();
 339                                 if (*in != '\0' && !IS_ASCII(*in)) {
 340                                         *out++ = SUBST_CHAR;
 341                                         in++;
 342                                         if (*in != '\0' && !IS_ASCII(*in)) {
 343                                                 *out++ = SUBST_CHAR;
 344                                                 in++;
 345                                         }
 346                                 }
 347                         }
 348                 } else {
 349                         K_OUT();
 350                         *out++ = SUBST_CHAR;
 351                         in++;
 352                 }
 353         }
 354
 355         K_OUT();
 356         *out = '\0';
 357 }
 358
 359 static void conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 360 {
 361         const guchar *in = inbuf;
 362         guchar *out = outbuf;
 363
 364         while (*in != '\0') {
 365                 if (IS_ASCII(*in)) {
 366                         *out++ = *in++;
 367                 } else if (issjiskanji1(*in)) {
 368                         if (issjiskanji2(*(in + 1))) {
 369                                 guchar out1 = *in;
 370                                 guchar out2 = *(in + 1);
 371                                 guchar row;
 372
 373                                 row = out1 < 0xa0 ? 0x70 : 0xb0;
 374                                 if (out2 < 0x9f) {
 375                                         out1 = (out1 - row) * 2 - 1;
 376                                         out2 -= out2 > 0x7f ? 0x20 : 0x1f;
 377                                 } else {
 378                                         out1 = (out1 - row) * 2;
 379                                         out2 -= 0x7e;
 380                                 }
 381
 382                                 *out++ = out1 | 0x80;
 383                                 *out++ = out2 | 0x80;
 384                                 in += 2;
 385                         } else {
 386                                 *out++ = SUBST_CHAR;
 387                                 in++;
 388                                 if (*in != '\0' && !IS_ASCII(*in)) {
 389                                         *out++ = SUBST_CHAR;
 390                                         in++;
 391                                 }
 392                         }
 393                 } else if (issjishwkana(*in)) {
 394                         *out++ = 0x8e;
 395                         *out++ = *in++;
 396                 } else {
 397                         *out++ = SUBST_CHAR;
 398                         in++;
 399                 }
 400         }
 401
 402         *out = '\0';
 403 }
 404
 405 static void conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 406 {
 407         gchar *eucstr;
 408
 409         Xalloca(eucstr, outlen, return);
 410
 411         conv_jistoeuc(eucstr, outlen, inbuf);
 412         conv_euctoutf8(outbuf, outlen, eucstr);
 413 }
 414
 415 static void conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 416 {
 417         gchar *tmpstr;
 418
 419         tmpstr = conv_iconv_strdup(inbuf, CS_SHIFT_JIS, CS_UTF_8);
 420         if (tmpstr) {
 421                 strncpy2(outbuf, tmpstr, outlen);
 422                 g_free(tmpstr);
 423         } else
 424                 strncpy2(outbuf, inbuf, outlen);
 425 }
 426
 427 static void conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 428 {
 429         static iconv_t cd = (iconv_t)-1;
 430         static gboolean iconv_ok = TRUE;
 431         gchar *tmpstr;
 432
 433         if (cd == (iconv_t)-1) {
 434                 if (!iconv_ok) {
 435                         strncpy2(outbuf, inbuf, outlen);
 436                         return;
 437                 }
 438                 cd = iconv_open(CS_UTF_8, CS_EUC_JP_MS);
 439                 if (cd == (iconv_t)-1) {
 440                         cd = iconv_open(CS_UTF_8, CS_EUC_JP);
 441                         if (cd == (iconv_t)-1) {
 442                                 g_warning("conv_euctoutf8(): %s\n",
 443                                           g_strerror(errno));
 444                                 iconv_ok = FALSE;
 445                                 strncpy2(outbuf, inbuf, outlen);
 446                                 return;
 447                         }
 448                 }
 449         }
 450
 451         tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
 452         if (tmpstr) {
 453                 strncpy2(outbuf, tmpstr, outlen);
 454                 g_free(tmpstr);
 455         } else
 456                 strncpy2(outbuf, inbuf, outlen);
 457 }
 458
 459 static void conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 460 {
 461         switch (conv_guess_ja_encoding(inbuf)) {
 462         case C_ISO_2022_JP:
 463                 conv_jistoutf8(outbuf, outlen, inbuf);
 464                 break;
 465         case C_SHIFT_JIS:
 466                 conv_sjistoutf8(outbuf, outlen, inbuf);
 467                 break;
 468         case C_EUC_JP:
 469                 conv_euctoutf8(outbuf, outlen, inbuf);
 470                 break;
 471         default:
 472                 strncpy2(outbuf, inbuf, outlen);
 473                 break;
 474         }
 475 }
 476
 477 static void conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 478 {
 479         static iconv_t cd = (iconv_t)-1;
 480         static gboolean iconv_ok = TRUE;
 481         gchar *tmpstr;
 482
 483         if (cd == (iconv_t)-1) {
 484                 if (!iconv_ok) {
 485                         strncpy2(outbuf, inbuf, outlen);
 486                         return;
 487                 }
 488                 cd = iconv_open(CS_EUC_JP_MS, CS_UTF_8);
 489                 if (cd == (iconv_t)-1) {
 490                         cd = iconv_open(CS_EUC_JP, CS_UTF_8);
 491                         if (cd == (iconv_t)-1) {
 492                                 g_warning("conv_utf8toeuc(): %s\n",
 493                                           g_strerror(errno));
 494                                 iconv_ok = FALSE;
 495                                 strncpy2(outbuf, inbuf, outlen);
 496                                 return;
 497                         }
 498                 }
 499         }
 500
 501         tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
 502         if (tmpstr) {
 503                 strncpy2(outbuf, tmpstr, outlen);
 504                 g_free(tmpstr);
 505         } else
 506                 strncpy2(outbuf, inbuf, outlen);
 507 }
 508
 509 static void conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 510 {
 511         gchar *eucstr;
 512
 513         Xalloca(eucstr, outlen, return);
 514
 515         conv_utf8toeuc(eucstr, outlen, inbuf);
 516         conv_euctojis(outbuf, outlen, eucstr);
 517 }
 518
 519 static void conv_unreadable_8bit(gchar *str)
 520 {
 521         register guchar *p = str;
 522
 523         while (*p != '\0') {
 524                 /* convert CR+LF -> LF */
 525                 if (*p == '\r' && *(p + 1) == '\n')
 526                         memmove(p, p + 1, strlen(p));
 527                 else if (!IS_ASCII(*p)) *p = SUBST_CHAR;
 528                 p++;
 529         }
 530 }
 531
 532 #define NCV     '\0'
 533
 534 void conv_mb_alnum(gchar *str)
 535 {
 536         static guchar char_tbl[] = {
 537                 /* 0xa0 - 0xaf */
 538                 NCV, ' ', NCV, NCV, ',', '.', NCV, ':',
 539                 ';', '?', '!', NCV, NCV, NCV, NCV, NCV,
 540                 /* 0xb0 - 0xbf */
 541                 NCV, NCV, NCV, NCV, NCV, NCV, NCV, NCV,
 542                 NCV, NCV, NCV, NCV, NCV, NCV, NCV, NCV,
 543                 /* 0xc0 - 0xcf */
 544                 NCV, NCV, NCV, NCV, NCV, NCV, NCV, NCV,
 545                 NCV, NCV, '(', ')', NCV, NCV, '[', ']',
 546                 /* 0xd0 - 0xdf */
 547                 '{', '}', NCV, NCV, NCV, NCV, NCV, NCV,
 548                 NCV, NCV, NCV, NCV, '+', '-', NCV, NCV,
 549                 /* 0xe0 - 0xef */
 550                 NCV, '=', NCV, '<', '>', NCV, NCV, NCV,
 551                 NCV, NCV, NCV, NCV, NCV, NCV, NCV, NCV
 552         };
 553
 554         register guchar *p = str;
 555         register gint len;
 556
 557         len = strlen(str);
 558
 559         while (len > 1) {
 560                 if (*p == 0xa3) {
 561                         register guchar ch = *(p + 1);
 562
 563                         if (ch >= 0xb0 && ch <= 0xfa) {
 564                                 /* [a-zA-Z] */
 565                                 *p = ch & 0x7f;
 566                                 p++;
 567                                 len--;
 568                                 memmove(p, p + 1, len);
 569                                 len--;
 570                         } else  {
 571                                 p += 2;
 572                                 len -= 2;
 573                         }
 574                 } else if (*p == 0xa1) {
 575                         register guchar ch = *(p + 1);
 576
 577                         if (ch >= 0xa0 && ch <= 0xef &&
 578                             NCV != char_tbl[ch - 0xa0]) {
 579                                 *p = char_tbl[ch - 0xa0];
 580                                 p++;
 581                                 len--;
 582                                 memmove(p, p + 1, len);
 583                                 len--;
 584                         } else {
 585                                 p += 2;
 586                                 len -= 2;
 587                         }
 588                 } else if (iseuckanji(*p)) {
 589                         p += 2;
 590                         len -= 2;
 591                 } else {
 592                         p++;
 593                         len--;
 594                 }
 595         }
 596 }
 597
 598 CharSet conv_guess_ja_encoding(const gchar *str)
 599 {
 600         const guchar *p = str;
 601         CharSet guessed = C_US_ASCII;
 602
 603         while (*p != '\0') {
 604                 if (*p == ESC && (*(p + 1) == '$' || *(p + 1) == '(')) {
 605                         if (guessed == C_US_ASCII)
 606                                 return C_ISO_2022_JP;
 607                         p += 2;
 608                 } else if (IS_ASCII(*p)) {
 609                         p++;
 610                 } else if (iseuckanji(*p) && iseuckanji(*(p + 1))) {
 611                         if (*p >= 0xfd && *p <= 0xfe)
 612                                 return C_EUC_JP;
 613                         else if (guessed == C_SHIFT_JIS) {
 614                                 if ((issjiskanji1(*p) &&
 615                                      issjiskanji2(*(p + 1))) ||
 616                                     issjishwkana(*p))
 617                                         guessed = C_SHIFT_JIS;
 618                                 else
 619                                         guessed = C_EUC_JP;
 620                         } else
 621                                 guessed = C_EUC_JP;
 622                         p += 2;
 623                 } else if (issjiskanji1(*p) && issjiskanji2(*(p + 1))) {
 624                         if (iseuchwkana1(*p) && iseuchwkana2(*(p + 1)))
 625                                 guessed = C_SHIFT_JIS;
 626                         else
 627                                 return C_SHIFT_JIS;
 628                         p += 2;
 629                 } else if (issjishwkana(*p)) {
 630                         guessed = C_SHIFT_JIS;
 631                         p++;
 632                 } else {
 633                         p++;
 634                 }
 635         }
 636
 637         return guessed;
 638 }
 639
 640 static void conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 641 {
 642         conv_jistoutf8(outbuf, outlen, inbuf);
 643 }
 644
 645 static void conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 646 {
 647         conv_sjistoutf8(outbuf, outlen, inbuf);
 648 }
 649
 650 static void conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 651 {
 652         conv_euctoutf8(outbuf, outlen, inbuf);
 653 }
 654
 655 void conv_utf8todisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 656 {
 657         if (g_utf8_validate(inbuf, -1, NULL) == TRUE)
 658                 strncpy2(outbuf, inbuf, outlen);
 659         else
 660                 conv_ustodisp(outbuf, outlen, inbuf);
 661 }
 662
 663 static void conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 664 {
 665         conv_anytoutf8(outbuf, outlen, inbuf);
 666         if (g_utf8_validate(outbuf, -1, NULL) != TRUE)
 667                 conv_unreadable_8bit(outbuf);
 668 }
 669
 670 static void conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 671 {
 672         strncpy2(outbuf, inbuf, outlen);
 673         conv_unreadable_8bit(outbuf);
 674 }
 675
 676 void conv_localetodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 677 {
 678         gchar *tmpstr;
 679
 680         tmpstr = conv_iconv_strdup(inbuf, conv_get_locale_charset_str(),
 681                                    CS_INTERNAL);
 682         if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
 683                 strncpy2(outbuf, tmpstr, outlen);
 684                 g_free(tmpstr);
 685         } else if (tmpstr && !g_utf8_validate(tmpstr, -1, NULL)) {
 686                 g_free(tmpstr);
 687                 conv_utf8todisp(outbuf, outlen, inbuf);
 688         } else
 689                 conv_utf8todisp(outbuf, outlen, inbuf);
 690 }
 691
 692 static void conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf)
 693 {
 694         strncpy2(outbuf, inbuf, outlen);
 695 }
 696
 697 static const gchar *
 698 conv_get_fallback_for_private_encoding(const gchar *encoding)
 699 {
 700         if (encoding && (encoding[0] == 'X' || encoding[0] == 'x') &&
 701             encoding[1] == '-') {
 702                 if (!g_ascii_strcasecmp(encoding, CS_X_GBK))
 703                         return CS_GBK;
 704         }
 705
 706         return encoding;
 707 }
 708
 709 CodeConverter *conv_code_converter_new(const gchar *src_charset)
 710 {
 711         CodeConverter *conv;
 712
 713         src_charset = conv_get_fallback_for_private_encoding(src_charset);
 714
 715         conv = g_new0(CodeConverter, 1);
 716         conv->code_conv_func = conv_get_code_conv_func(src_charset, NULL);
 717         conv->charset_str = g_strdup(src_charset);
 718         conv->charset = conv_get_charset_from_str(src_charset);
 719
 720         return conv;
 721 }
 722
 723 void conv_code_converter_destroy(CodeConverter *conv)
 724 {
 725         g_free(conv->charset_str);
 726         g_free(conv);
 727 }
 728
 729 gint conv_convert(CodeConverter *conv, gchar *outbuf, gint outlen,
 730                   const gchar *inbuf)
 731 {
 732         if (conv->code_conv_func != conv_noconv)
 733                 conv->code_conv_func(outbuf, outlen, inbuf);
 734         else {
 735                 gchar *str;
 736
 737                 str = conv_iconv_strdup(inbuf, conv->charset_str, NULL);
 738                 if (!str)
 739                         return -1;
 740                 else {
 741                         strncpy2(outbuf, str, outlen);
 742                         g_free(str);
 743                 }
 744         }
 745
 746         return 0;
 747 }
 748
 749 gchar *conv_codeset_strdup(const gchar *inbuf,
 750                            const gchar *src_code, const gchar *dest_code)
 751 {
 752         gchar *buf;
 753         size_t len;
 754         CodeConvFunc conv_func;
 755
 756         src_code = conv_get_fallback_for_private_encoding(src_code);
 757         conv_func = conv_get_code_conv_func(src_code, dest_code);
 758         if (conv_func != conv_noconv) {
 759                 len = (strlen(inbuf) + 1) * 3;
 760                 buf = g_malloc(len);
 761                 if (!buf) return NULL;
 762
 763                 conv_func(buf, len, inbuf);
 764                 return g_realloc(buf, strlen(buf) + 1);
 765         }
 766
 767         return conv_iconv_strdup(inbuf, src_code, dest_code);
 768 }
 769
 770 CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
 771                                      const gchar *dest_charset_str)
 772 {
 773         CodeConvFunc code_conv = conv_noconv;
 774         CharSet src_charset;
 775         CharSet dest_charset;
 776
 777         if (!src_charset_str)
 778                 src_charset = conv_get_locale_charset();
 779         else
 780                 src_charset = conv_get_charset_from_str(src_charset_str);
 781
 782         /* auto detection mode */
 783         if (!src_charset_str && !dest_charset_str) {
 784                 if (conv_is_ja_locale())
 785                         return conv_anytodisp;
 786                 else
 787                         return conv_noconv;
 788         }
 789
 790         dest_charset = conv_get_charset_from_str(dest_charset_str);
 791
 792         if (dest_charset == C_US_ASCII)
 793                 return conv_ustodisp;
 794
 795         switch (src_charset) {
 796         case C_US_ASCII:
 797         case C_ISO_8859_1:
 798         case C_ISO_8859_2:
 799         case C_ISO_8859_3:
 800         case C_ISO_8859_4:
 801         case C_ISO_8859_5:
 802         case C_ISO_8859_6:
 803         case C_ISO_8859_7:
 804         case C_ISO_8859_8:
 805         case C_ISO_8859_9:
 806         case C_ISO_8859_10:
 807         case C_ISO_8859_11:
 808         case C_ISO_8859_13:
 809         case C_ISO_8859_14:
 810         case C_ISO_8859_15:
 811                 break;
 812         case C_ISO_2022_JP:
 813         case C_ISO_2022_JP_2:
 814         case C_ISO_2022_JP_3:
 815                 if (dest_charset == C_AUTO)
 816                         code_conv = conv_jistodisp;
 817                 else if (dest_charset == C_EUC_JP)
 818                         code_conv = conv_jistoeuc;
 819                 else if (dest_charset == C_UTF_8)
 820                         code_conv = conv_jistoutf8;
 821                 break;
 822         case C_SHIFT_JIS:
 823                 if (dest_charset == C_AUTO)
 824                         code_conv = conv_sjistodisp;
 825                 else if (dest_charset == C_EUC_JP)
 826                         code_conv = conv_sjistoeuc;
 827                 else if (dest_charset == C_UTF_8)
 828                         code_conv = conv_sjistoutf8;
 829                 break;
 830         case C_EUC_JP:
 831                 if (dest_charset == C_AUTO)
 832                         code_conv = conv_euctodisp;
 833                 else if (dest_charset == C_ISO_2022_JP   ||
 834                          dest_charset == C_ISO_2022_JP_2 ||
 835                          dest_charset == C_ISO_2022_JP_3)
 836                         code_conv = conv_euctojis;
 837                 else if (dest_charset == C_UTF_8)
 838                         code_conv = conv_euctoutf8;
 839                 break;
 840         case C_UTF_8:
 841                 if (dest_charset == C_EUC_JP)
 842                         code_conv = conv_utf8toeuc;
 843                 else if (dest_charset == C_ISO_2022_JP   ||
 844                          dest_charset == C_ISO_2022_JP_2 ||
 845                          dest_charset == C_ISO_2022_JP_3)
 846                         code_conv = conv_utf8tojis;
 847                 break;
 848         default:
 849                 break;
 850         }
 851
 852         return code_conv;
 853 }
 854
 855 gchar *conv_iconv_strdup(const gchar *inbuf,
 856                          const gchar *src_code, const gchar *dest_code)
 857 {
 858         iconv_t cd;
 859         gchar *outbuf;
 860
 861         if (!src_code)
 862                 src_code = conv_get_outgoing_charset_str();
 863         if (!dest_code)
 864                 dest_code = CS_INTERNAL;
 865
 866         /* don't convert if src and dest codeset are identical */
 867         if (!strcasecmp(src_code, dest_code))
 868                 return g_strdup(inbuf);
 869
 870         /* don't convert if current codeset is US-ASCII */
 871         if (!strcasecmp(dest_code, CS_US_ASCII))
 872                 return g_strdup(inbuf);
 873
 874         cd = iconv_open(dest_code, src_code);
 875         if (cd == (iconv_t)-1)
 876                 return NULL;
 877
 878         outbuf = conv_iconv_strdup_with_cd(inbuf, cd);
 879
 880         iconv_close(cd);
 881
 882         return outbuf;
 883 }
 884
 885 gchar *conv_iconv_strdup_with_cd(const gchar *inbuf, iconv_t cd)
 886 {
 887         const gchar *inbuf_p;
 888         gchar *outbuf;
 889         gchar *outbuf_p;
 890         size_t in_size;
 891         size_t in_left;
 892         size_t out_size;
 893         size_t out_left;
 894         size_t n_conv;
 895         size_t len;
 896
 897         inbuf_p = inbuf;
 898         in_size = strlen(inbuf);
 899         in_left = in_size;
 900         out_size = (in_size + 1) * 2;
 901         outbuf = g_malloc(out_size);
 902         outbuf_p = outbuf;
 903         out_left = out_size;
 904
 905 #define EXPAND_BUF()                            \
 906 {                                               \
 907         len = outbuf_p - outbuf;                \
 908         out_size *= 2;                          \
 909         outbuf = g_realloc(outbuf, out_size);   \
 910         outbuf_p = outbuf + len;                \
 911         out_left = out_size - len;              \
 912 }
 913
 914         while ((n_conv = iconv(cd, (ICONV_CONST gchar **)&inbuf_p, &in_left,
 915                                &outbuf_p, &out_left)) == (size_t)-1) {
 916                 if (EILSEQ == errno) {
 917                         if (strict_mode) {
 918                                 g_free(outbuf);
 919                                 return NULL;
 920                         }
 921                         //g_print("iconv(): at %d: %s\n", in_size - in_left, g_strerror(errno));
 922                         inbuf_p++;
 923                         in_left--;
 924                         if (out_left == 0) {
 925                                 EXPAND_BUF();
 926                         }
 927                         *outbuf_p++ = SUBST_CHAR;
 928                         out_left--;
 929                 } else if (EINVAL == errno) {
 930                         break;
 931                 } else if (E2BIG == errno) {
 932                         EXPAND_BUF();
 933                 } else {
 934                         g_warning("conv_iconv_strdup(): %s\n",
 935                                   g_strerror(errno));
 936                         break;
 937                 }
 938         }
 939
 940         while ((n_conv = iconv(cd, NULL, NULL, &outbuf_p, &out_left)) ==
 941                (size_t)-1) {
 942                 if (E2BIG == errno) {
 943                         EXPAND_BUF();
 944                 } else {
 945                         g_warning("conv_iconv_strdup(): %s\n",
 946                                   g_strerror(errno));
 947                         break;
 948                 }
 949         }
 950
 951 #undef EXPAND_BUF
 952
 953         len = outbuf_p - outbuf;
 954         outbuf = g_realloc(outbuf, len + 1);
 955         outbuf[len] = '\0';
 956
 957         return outbuf;
 958 }
 959
 960 static const struct {
 961         CharSet charset;
 962         gchar *const name;
 963 } charsets[] = {
 964         {C_US_ASCII,            CS_US_ASCII},
 965         {C_US_ASCII,            CS_ANSI_X3_4_1968},
 966         {C_UTF_8,               CS_UTF_8},
 967         {C_UTF_7,               CS_UTF_7},
 968         {C_ISO_8859_1,          CS_ISO_8859_1},
 969         {C_ISO_8859_2,          CS_ISO_8859_2},
 970         {C_ISO_8859_3,          CS_ISO_8859_3},
 971         {C_ISO_8859_4,          CS_ISO_8859_4},
 972         {C_ISO_8859_5,          CS_ISO_8859_5},
 973         {C_ISO_8859_6,          CS_ISO_8859_6},
 974         {C_ISO_8859_7,          CS_ISO_8859_7},
 975         {C_ISO_8859_8,          CS_ISO_8859_8},
 976         {C_ISO_8859_9,          CS_ISO_8859_9},
 977         {C_ISO_8859_10,         CS_ISO_8859_10},
 978         {C_ISO_8859_11,         CS_ISO_8859_11},
 979         {C_ISO_8859_13,         CS_ISO_8859_13},
 980         {C_ISO_8859_14,         CS_ISO_8859_14},
 981         {C_ISO_8859_15,         CS_ISO_8859_15},
 982         {C_BALTIC,              CS_BALTIC},
 983         {C_CP1250,              CS_CP1250},
 984         {C_CP1251,              CS_CP1251},
 985         {C_CP1252,              CS_CP1252},
 986         {C_CP1253,              CS_CP1253},
 987         {C_CP1254,              CS_CP1254},
 988         {C_CP1255,              CS_CP1255},
 989         {C_CP1256,              CS_CP1256},
 990         {C_CP1257,              CS_CP1257},
 991         {C_CP1258,              CS_CP1258},
 992         {C_WINDOWS_1250,        CS_WINDOWS_1250},
 993         {C_WINDOWS_1251,        CS_WINDOWS_1251},
 994         {C_WINDOWS_1252,        CS_WINDOWS_1252},
 995         {C_WINDOWS_1253,        CS_WINDOWS_1253},
 996         {C_WINDOWS_1254,        CS_WINDOWS_1254},
 997         {C_WINDOWS_1255,        CS_WINDOWS_1255},
 998         {C_WINDOWS_1256,        CS_WINDOWS_1256},
 999         {C_WINDOWS_1257,        CS_WINDOWS_1257},
1000         {C_WINDOWS_1258,        CS_WINDOWS_1258},
1001         {C_KOI8_R,              CS_KOI8_R},
1002         {C_KOI8_T,              CS_KOI8_T},
1003         {C_KOI8_U,              CS_KOI8_U},
1004         {C_ISO_2022_JP,         CS_ISO_2022_JP},
1005         {C_ISO_2022_JP_2,       CS_ISO_2022_JP_2},
1006         {C_ISO_2022_JP_3,       CS_ISO_2022_JP_3},
1007         {C_EUC_JP,              CS_EUC_JP},
1008         {C_EUC_JP,              CS_EUCJP},
1009         {C_EUC_JP_MS,           CS_EUC_JP_MS},
1010         {C_SHIFT_JIS,           CS_SHIFT_JIS},
1011         {C_SHIFT_JIS,           CS_SHIFT__JIS},
1012         {C_SHIFT_JIS,           CS_SJIS},
1013         {C_ISO_2022_KR,         CS_ISO_2022_KR},
1014         {C_EUC_KR,              CS_EUC_KR},
1015         {C_ISO_2022_CN,         CS_ISO_2022_CN},
1016         {C_EUC_CN,              CS_EUC_CN},
1017         {C_GB2312,              CS_GB2312},
1018         {C_GBK,                 CS_GBK},
1019         {C_EUC_TW,              CS_EUC_TW},
1020         {C_BIG5,                CS_BIG5},
1021         {C_BIG5_HKSCS,          CS_BIG5_HKSCS},
1022         {C_TIS_620,             CS_TIS_620},
1023         {C_WINDOWS_874,         CS_WINDOWS_874},
1024         {C_GEORGIAN_PS,         CS_GEORGIAN_PS},
1025         {C_TCVN5712_1,          CS_TCVN5712_1},
1026 };
1027
1028 static const struct {
1029         gchar *const locale;
1030         CharSet charset;
1031         CharSet out_charset;
1032 } locale_table[] = {
1033         {"ja_JP.eucJP"  , C_EUC_JP      , C_ISO_2022_JP},
1034         {"ja_JP.EUC-JP" , C_EUC_JP      , C_ISO_2022_JP},
1035         {"ja_JP.EUC"    , C_EUC_JP      , C_ISO_2022_JP},
1036         {"ja_JP.ujis"   , C_EUC_JP      , C_ISO_2022_JP},
1037         {"ja_JP.SJIS"   , C_SHIFT_JIS   , C_ISO_2022_JP},
1038         {"ja_JP.JIS"    , C_ISO_2022_JP , C_ISO_2022_JP},
1039 #ifdef G_OS_WIN32
1040         {"ja_JP"        , C_SHIFT_JIS   , C_ISO_2022_JP},
1041 #else
1042         {"ja_JP"        , C_EUC_JP      , C_ISO_2022_JP},
1043 #endif
1044         {"ko_KR.EUC-KR" , C_EUC_KR      , C_EUC_KR},
1045         {"ko_KR"        , C_EUC_KR      , C_EUC_KR},
1046         {"zh_CN.GB2312" , C_GB2312      , C_GB2312},
1047         {"zh_CN.GBK"    , C_GBK         , C_GBK},
1048         {"zh_CN"        , C_GB2312      , C_GB2312},
1049         {"zh_HK"        , C_BIG5_HKSCS  , C_BIG5_HKSCS},
1050         {"zh_TW.eucTW"  , C_EUC_TW      , C_BIG5},
1051         {"zh_TW.EUC-TW" , C_EUC_TW      , C_BIG5},
1052         {"zh_TW.Big5"   , C_BIG5        , C_BIG5},
1053         {"zh_TW"        , C_BIG5        , C_BIG5},
1054
1055         {"ru_RU.KOI8-R" , C_KOI8_R      , C_KOI8_R},
1056         {"ru_RU.KOI8R"  , C_KOI8_R      , C_KOI8_R},
1057         {"ru_RU.CP1251" , C_WINDOWS_1251, C_KOI8_R},
1058         {"ru_RU"        , C_ISO_8859_5  , C_KOI8_R},
1059         {"tg_TJ"        , C_KOI8_T      , C_KOI8_T},
1060         {"ru_UA"        , C_KOI8_U      , C_KOI8_U},
1061         {"uk_UA.CP1251" , C_WINDOWS_1251, C_KOI8_U},
1062         {"uk_UA"        , C_KOI8_U      , C_KOI8_U},
1063
1064         {"be_BY"        , C_WINDOWS_1251, C_WINDOWS_1251},
1065         {"bg_BG"        , C_WINDOWS_1251, C_WINDOWS_1251},
1066
1067         {"yi_US"        , C_WINDOWS_1255, C_WINDOWS_1255},
1068
1069         {"af_ZA"        , C_ISO_8859_1  , C_ISO_8859_1},
1070         {"br_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1071         {"ca_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1072         {"da_DK"        , C_ISO_8859_1  , C_ISO_8859_1},
1073         {"de_AT"        , C_ISO_8859_1  , C_ISO_8859_1},
1074         {"de_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1075         {"de_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1076         {"de_DE"        , C_ISO_8859_1  , C_ISO_8859_1},
1077         {"de_LU"        , C_ISO_8859_1  , C_ISO_8859_1},
1078         {"en_AU"        , C_ISO_8859_1  , C_ISO_8859_1},
1079         {"en_BW"        , C_ISO_8859_1  , C_ISO_8859_1},
1080         {"en_CA"        , C_ISO_8859_1  , C_ISO_8859_1},
1081         {"en_DK"        , C_ISO_8859_1  , C_ISO_8859_1},
1082         {"en_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1083         {"en_HK"        , C_ISO_8859_1  , C_ISO_8859_1},
1084         {"en_IE"        , C_ISO_8859_1  , C_ISO_8859_1},
1085         {"en_NZ"        , C_ISO_8859_1  , C_ISO_8859_1},
1086         {"en_PH"        , C_ISO_8859_1  , C_ISO_8859_1},
1087         {"en_SG"        , C_ISO_8859_1  , C_ISO_8859_1},
1088         {"en_US"        , C_ISO_8859_1  , C_ISO_8859_1},
1089         {"en_ZA"        , C_ISO_8859_1  , C_ISO_8859_1},
1090         {"en_ZW"        , C_ISO_8859_1  , C_ISO_8859_1},
1091         {"es_AR"        , C_ISO_8859_1  , C_ISO_8859_1},
1092         {"es_BO"        , C_ISO_8859_1  , C_ISO_8859_1},
1093         {"es_CL"        , C_ISO_8859_1  , C_ISO_8859_1},
1094         {"es_CO"        , C_ISO_8859_1  , C_ISO_8859_1},
1095         {"es_CR"        , C_ISO_8859_1  , C_ISO_8859_1},
1096         {"es_DO"        , C_ISO_8859_1  , C_ISO_8859_1},
1097         {"es_EC"        , C_ISO_8859_1  , C_ISO_8859_1},
1098         {"es_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1099         {"es_GT"        , C_ISO_8859_1  , C_ISO_8859_1},
1100         {"es_HN"        , C_ISO_8859_1  , C_ISO_8859_1},
1101         {"es_MX"        , C_ISO_8859_1  , C_ISO_8859_1},
1102         {"es_NI"        , C_ISO_8859_1  , C_ISO_8859_1},
1103         {"es_PA"        , C_ISO_8859_1  , C_ISO_8859_1},
1104         {"es_PE"        , C_ISO_8859_1  , C_ISO_8859_1},
1105         {"es_PR"        , C_ISO_8859_1  , C_ISO_8859_1},
1106         {"es_PY"        , C_ISO_8859_1  , C_ISO_8859_1},
1107         {"es_SV"        , C_ISO_8859_1  , C_ISO_8859_1},
1108         {"es_US"        , C_ISO_8859_1  , C_ISO_8859_1},
1109         {"es_UY"        , C_ISO_8859_1  , C_ISO_8859_1},
1110         {"es_VE"        , C_ISO_8859_1  , C_ISO_8859_1},
1111         {"et_EE"        , C_ISO_8859_1  , C_ISO_8859_1},
1112         {"eu_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1113         {"fi_FI"        , C_ISO_8859_1  , C_ISO_8859_1},
1114         {"fo_FO"        , C_ISO_8859_1  , C_ISO_8859_1},
1115         {"fr_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1116         {"fr_CA"        , C_ISO_8859_1  , C_ISO_8859_1},
1117         {"fr_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1118         {"fr_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1119         {"fr_LU"        , C_ISO_8859_1  , C_ISO_8859_1},
1120         {"ga_IE"        , C_ISO_8859_1  , C_ISO_8859_1},
1121         {"gl_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1122         {"gv_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1123         {"id_ID"        , C_ISO_8859_1  , C_ISO_8859_1},
1124         {"is_IS"        , C_ISO_8859_1  , C_ISO_8859_1},
1125         {"it_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1126         {"it_IT"        , C_ISO_8859_1  , C_ISO_8859_1},
1127         {"kl_GL"        , C_ISO_8859_1  , C_ISO_8859_1},
1128         {"kw_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1129         {"ms_MY"        , C_ISO_8859_1  , C_ISO_8859_1},
1130         {"nl_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1131         {"nl_NL"        , C_ISO_8859_1  , C_ISO_8859_1},
1132         {"nn_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1133         {"no_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1134         {"oc_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1135         {"pt_BR"        , C_ISO_8859_1  , C_ISO_8859_1},
1136         {"pt_PT"        , C_ISO_8859_1  , C_ISO_8859_1},
1137         {"sq_AL"        , C_ISO_8859_1  , C_ISO_8859_1},
1138         {"sv_FI"        , C_ISO_8859_1  , C_ISO_8859_1},
1139         {"sv_SE"        , C_ISO_8859_1  , C_ISO_8859_1},
1140         {"tl_PH"        , C_ISO_8859_1  , C_ISO_8859_1},
1141         {"uz_UZ"        , C_ISO_8859_1  , C_ISO_8859_1},
1142         {"wa_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1143
1144         {"bs_BA"        , C_ISO_8859_2  , C_ISO_8859_2},
1145         {"cs_CZ"        , C_ISO_8859_2  , C_ISO_8859_2},
1146         {"hr_HR"        , C_ISO_8859_2  , C_ISO_8859_2},
1147         {"hu_HU"        , C_ISO_8859_2  , C_ISO_8859_2},
1148         {"pl_PL"        , C_ISO_8859_2  , C_ISO_8859_2},
1149         {"ro_RO"        , C_ISO_8859_2  , C_ISO_8859_2},
1150         {"sk_SK"        , C_ISO_8859_2  , C_ISO_8859_2},
1151         {"sl_SI"        , C_ISO_8859_2  , C_ISO_8859_2},
1152
1153         {"sr_YU@cyrillic"       , C_ISO_8859_5  , C_ISO_8859_5},
1154         {"sr_YU"                , C_ISO_8859_2  , C_ISO_8859_2},
1155
1156         {"mt_MT"                , C_ISO_8859_3  , C_ISO_8859_3},
1157
1158         {"lt_LT.iso88594"       , C_ISO_8859_4  , C_ISO_8859_4},
1159         {"lt_LT.ISO8859-4"      , C_ISO_8859_4  , C_ISO_8859_4},
1160         {"lt_LT.ISO_8859-4"     , C_ISO_8859_4  , C_ISO_8859_4},
1161         {"lt_LT"                , C_ISO_8859_13 , C_ISO_8859_13},
1162
1163         {"mk_MK"        , C_ISO_8859_5  , C_ISO_8859_5},
1164
1165         {"ar_AE"        , C_ISO_8859_6  , C_ISO_8859_6},
1166         {"ar_BH"        , C_ISO_8859_6  , C_ISO_8859_6},
1167         {"ar_DZ"        , C_ISO_8859_6  , C_ISO_8859_6},
1168         {"ar_EG"        , C_ISO_8859_6  , C_ISO_8859_6},
1169         {"ar_IQ"        , C_ISO_8859_6  , C_ISO_8859_6},
1170         {"ar_JO"        , C_ISO_8859_6  , C_ISO_8859_6},
1171         {"ar_KW"        , C_ISO_8859_6  , C_ISO_8859_6},
1172         {"ar_LB"        , C_ISO_8859_6  , C_ISO_8859_6},
1173         {"ar_LY"        , C_ISO_8859_6  , C_ISO_8859_6},
1174         {"ar_MA"        , C_ISO_8859_6  , C_ISO_8859_6},
1175         {"ar_OM"        , C_ISO_8859_6  , C_ISO_8859_6},
1176         {"ar_QA"        , C_ISO_8859_6  , C_ISO_8859_6},
1177         {"ar_SA"        , C_ISO_8859_6  , C_ISO_8859_6},
1178         {"ar_SD"        , C_ISO_8859_6  , C_ISO_8859_6},
1179         {"ar_SY"        , C_ISO_8859_6  , C_ISO_8859_6},
1180         {"ar_TN"        , C_ISO_8859_6  , C_ISO_8859_6},
1181         {"ar_YE"        , C_ISO_8859_6  , C_ISO_8859_6},
1182
1183         {"el_GR"        , C_ISO_8859_7  , C_ISO_8859_7},
1184         {"he_IL"        , C_ISO_8859_8  , C_ISO_8859_8},
1185         {"iw_IL"        , C_ISO_8859_8  , C_ISO_8859_8},
1186         {"tr_TR"        , C_ISO_8859_9  , C_ISO_8859_9},
1187
1188         {"lv_LV"        , C_ISO_8859_13 , C_ISO_8859_13},
1189         {"mi_NZ"        , C_ISO_8859_13 , C_ISO_8859_13},
1190
1191         {"cy_GB"        , C_ISO_8859_14 , C_ISO_8859_14},
1192
1193         {"ar_IN"        , C_UTF_8       , C_UTF_8},
1194         {"en_IN"        , C_UTF_8       , C_UTF_8},
1195         {"se_NO"        , C_UTF_8       , C_UTF_8},
1196         {"ta_IN"        , C_UTF_8       , C_UTF_8},
1197         {"te_IN"        , C_UTF_8       , C_UTF_8},
1198         {"ur_PK"        , C_UTF_8       , C_UTF_8},
1199
1200         {"th_TH"        , C_TIS_620     , C_TIS_620},
1201         /* {"th_TH"     , C_WINDOWS_874}, */
1202         /* {"th_TH"     , C_ISO_8859_11}, */
1203
1204         {"ka_GE"        , C_GEORGIAN_PS , C_GEORGIAN_PS},
1205         {"vi_VN.TCVN"   , C_TCVN5712_1  , C_TCVN5712_1},
1206
1207         {"C"                    , C_US_ASCII    , C_US_ASCII},
1208         {"POSIX"                , C_US_ASCII    , C_US_ASCII},
1209         {"ANSI_X3.4-1968"       , C_US_ASCII    , C_US_ASCII},
1210 };
1211
1212 static GHashTable *conv_get_charset_to_str_table(void)
1213 {
1214         static GHashTable *table;
1215         gint i;
1216
1217         if (table)
1218                 return table;
1219
1220         table = g_hash_table_new(NULL, g_direct_equal);
1221
1222         for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1223                 if (g_hash_table_lookup(table, GUINT_TO_POINTER(charsets[i].charset))
1224                     == NULL) {
1225                         g_hash_table_insert
1226                                 (table, GUINT_TO_POINTER(charsets[i].charset),
1227                                  charsets[i].name);
1228                 }
1229         }
1230
1231         return table;
1232 }
1233
1234 static GHashTable *conv_get_charset_from_str_table(void)
1235 {
1236         static GHashTable *table;
1237         gint i;
1238
1239         if (table)
1240                 return table;
1241
1242         table = g_hash_table_new(str_case_hash, str_case_equal);
1243
1244         for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1245                 g_hash_table_insert(table, charsets[i].name,
1246                                     GUINT_TO_POINTER(charsets[i].charset));
1247         }
1248
1249         return table;
1250 }
1251
1252 const gchar *conv_get_charset_str(CharSet charset)
1253 {
1254         GHashTable *table;
1255
1256         table = conv_get_charset_to_str_table();
1257         return g_hash_table_lookup(table, GUINT_TO_POINTER(charset));
1258 }
1259
1260 CharSet conv_get_charset_from_str(const gchar *charset)
1261 {
1262         GHashTable *table;
1263
1264         if (!charset) return C_AUTO;
1265
1266         table = conv_get_charset_from_str_table();
1267         return GPOINTER_TO_UINT(g_hash_table_lookup(table, charset));
1268 }
1269
1270 CharSet conv_get_locale_charset(void)
1271 {
1272         static CharSet cur_charset = -1;
1273         const gchar *cur_locale;
1274         const gchar *p;
1275         gint i;
1276
1277         if (cur_charset != -1)
1278                 return cur_charset;
1279
1280         cur_locale = conv_get_current_locale();
1281         if (!cur_locale) {
1282                 cur_charset = C_US_ASCII;
1283                 return cur_charset;
1284         }
1285
1286         if (strcasestr(cur_locale, "UTF-8")) {
1287                 cur_charset = C_UTF_8;
1288                 return cur_charset;
1289         }
1290
1291         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1292                 cur_charset = C_ISO_8859_15;
1293                 return cur_charset;
1294         }
1295
1296         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1297                 const gchar *p;
1298
1299                 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1300                    "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1301                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1302                                  strlen(locale_table[i].locale))) {
1303                         cur_charset = locale_table[i].charset;
1304                         return cur_charset;
1305                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1306                          !strchr(p + 1, '.')) {
1307                         if (strlen(cur_locale) == 2 &&
1308                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1309                                 cur_charset = locale_table[i].charset;
1310                                 return cur_charset;
1311                         }
1312                 }
1313         }
1314
1315         cur_charset = C_AUTO;
1316         return cur_charset;
1317 }
1318
1319 static CharSet conv_get_locale_charset_no_utf8(void)
1320 {
1321         static CharSet cur_charset = -1;
1322         const gchar *cur_locale;
1323         const gchar *p;
1324         gchar *tmp;
1325         gint i;
1326
1327         if (prefs_common.broken_are_utf8)
1328                 return conv_get_locale_charset();
1329
1330         if (cur_charset != -1)
1331                 return cur_charset;
1332
1333         cur_locale = conv_get_current_locale();
1334         if (!cur_locale) {
1335                 cur_charset = C_US_ASCII;
1336                 return cur_charset;
1337         }
1338
1339         if (strcasestr(cur_locale, "UTF-8")) {
1340                 tmp = g_strdup(cur_locale);
1341                 *(strcasestr(tmp, ".UTF-8")) = '\0';
1342                 cur_locale = tmp;
1343         }
1344
1345         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1346                 cur_charset = C_ISO_8859_15;
1347                 return cur_charset;
1348         }
1349
1350         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1351                 const gchar *p;
1352
1353                 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1354                    "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1355                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1356                                  strlen(locale_table[i].locale))) {
1357                         cur_charset = locale_table[i].charset;
1358                         return cur_charset;
1359                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1360                          !strchr(p + 1, '.')) {
1361                         if (strlen(cur_locale) == 2 &&
1362                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1363                                 cur_charset = locale_table[i].charset;
1364                                 return cur_charset;
1365                         }
1366                 }
1367         }
1368
1369         cur_charset = C_AUTO;
1370         return cur_charset;
1371 }
1372
1373 const gchar *conv_get_locale_charset_str(void)
1374 {
1375         static const gchar *codeset = NULL;
1376
1377         if (!codeset)
1378                 codeset = conv_get_charset_str(conv_get_locale_charset());
1379
1380         return codeset ? codeset : CS_INTERNAL;
1381 }
1382
1383 const gchar *conv_get_locale_charset_str_no_utf8(void)
1384 {
1385         static const gchar *codeset = NULL;
1386
1387         if (!codeset)
1388                 codeset = conv_get_charset_str(conv_get_locale_charset_no_utf8());
1389
1390         return codeset ? codeset : CS_INTERNAL;
1391 }
1392
1393 CharSet conv_get_internal_charset(void)
1394 {
1395         return C_INTERNAL;
1396 }
1397
1398 const gchar *conv_get_internal_charset_str(void)
1399 {
1400         return CS_INTERNAL;
1401 }
1402
1403 CharSet conv_get_outgoing_charset(void)
1404 {
1405         static CharSet out_charset = -1;
1406         const gchar *cur_locale;
1407         const gchar *p;
1408         gint i;
1409
1410         if (out_charset != -1)
1411                 return out_charset;
1412
1413         cur_locale = conv_get_current_locale();
1414         if (!cur_locale) {
1415                 out_charset = C_AUTO;
1416                 return out_charset;
1417         }
1418
1419         if (strcasestr(cur_locale, "UTF-8")) {
1420                 out_charset = C_UTF_8;
1421                 return out_charset;
1422         }
1423
1424         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1425                 out_charset = C_ISO_8859_15;
1426                 return out_charset;
1427         }
1428
1429         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1430                 const gchar *p;
1431
1432                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1433                                  strlen(locale_table[i].locale))) {
1434                         out_charset = locale_table[i].out_charset;
1435                         break;
1436                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1437                          !strchr(p + 1, '.')) {
1438                         if (strlen(cur_locale) == 2 &&
1439                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1440                                 out_charset = locale_table[i].out_charset;
1441                                 break;
1442                         }
1443                 }
1444         }
1445
1446         return out_charset;
1447 }
1448
1449 const gchar *conv_get_outgoing_charset_str(void)
1450 {
1451         CharSet out_charset;
1452         const gchar *str;
1453
1454         out_charset = conv_get_outgoing_charset();
1455         str = conv_get_charset_str(out_charset);
1456
1457         return str ? str : CS_UTF_8;
1458 }
1459
1460 gboolean conv_is_multibyte_encoding(CharSet encoding)
1461 {
1462         switch (encoding) {
1463         case C_EUC_JP:
1464         case C_EUC_JP_MS:
1465         case C_EUC_KR:
1466         case C_EUC_TW:
1467         case C_EUC_CN:
1468         case C_ISO_2022_JP:
1469         case C_ISO_2022_JP_2:
1470         case C_ISO_2022_JP_3:
1471         case C_ISO_2022_KR:
1472         case C_ISO_2022_CN:
1473         case C_SHIFT_JIS:
1474         case C_GB2312:
1475         case C_GBK:
1476         case C_BIG5:
1477         case C_UTF_8:
1478         case C_UTF_7:
1479                 return TRUE;
1480         default:
1481                 return FALSE;
1482         }
1483 }
1484
1485 const gchar *conv_get_current_locale(void)
1486 {
1487         const gchar *cur_locale;
1488
1489 #ifdef G_OS_WIN32
1490         cur_locale = g_win32_getlocale();
1491 #else
1492         cur_locale = g_getenv("LC_ALL");
1493         if (!cur_locale) cur_locale = g_getenv("LC_CTYPE");
1494         if (!cur_locale) cur_locale = g_getenv("LANG");
1495         if (!cur_locale) cur_locale = setlocale(LC_CTYPE, NULL);
1496 #endif /* G_OS_WIN32 */
1497
1498         debug_print("current locale: %s\n",
1499                     cur_locale ? cur_locale : "(none)");
1500
1501         return cur_locale;
1502 }
1503
1504 gboolean conv_is_ja_locale(void)
1505 {
1506         static gint is_ja_locale = -1;
1507         const gchar *cur_locale;
1508
1509         if (is_ja_locale != -1)
1510                 return is_ja_locale != 0;
1511
1512         is_ja_locale = 0;
1513         cur_locale = conv_get_current_locale();
1514         if (cur_locale) {
1515                 if (g_ascii_strncasecmp(cur_locale, "ja", 2) == 0)
1516                         is_ja_locale = 1;
1517         }
1518
1519         return is_ja_locale != 0;
1520 }
1521
1522 gchar *conv_unmime_header(const gchar *str, const gchar *default_encoding)
1523 {
1524         gchar buf[BUFFSIZE];
1525
1526         if (is_ascii_str(str))
1527                 return unmime_header(str);
1528
1529         if (default_encoding) {
1530                 gchar *utf8_buf;
1531
1532                 utf8_buf = conv_codeset_strdup
1533                         (str, default_encoding, CS_INTERNAL);
1534                 if (utf8_buf) {
1535                         gchar *decoded_str;
1536
1537                         decoded_str = unmime_header(utf8_buf);
1538                         g_free(utf8_buf);
1539                         return decoded_str;
1540                 }
1541         }
1542
1543         if (conv_is_ja_locale())
1544                 conv_anytodisp(buf, sizeof(buf), str);
1545         else
1546                 conv_localetodisp(buf, sizeof(buf), str);
1547
1548         return unmime_header(buf);
1549 }
1550
1551 #define MAX_LINELEN             76
1552 #define MAX_HARD_LINELEN        996
1553 #define MIMESEP_BEGIN           "=?"
1554 #define MIMESEP_END             "?="
1555
1556 #define LBREAK_IF_REQUIRED(cond, is_plain_text)                         \
1557 {                                                                       \
1558         if (len - (destp - (guchar *)dest) < MAX_LINELEN + 2) {         \
1559                 *destp = '\0';                                          \
1560                 return;                                                 \
1561         }                                                               \
1562                                                                         \
1563         if ((cond) && *srcp) {                                          \
1564                 if (destp > (guchar *)dest && left < MAX_LINELEN - 1) { \
1565                         if (isspace(*(destp - 1)))                      \
1566                                 destp--;                                \
1567                         else if (is_plain_text && isspace(*srcp))       \
1568                                 srcp++;                                 \
1569                         if (*srcp) {                                    \
1570                                 *destp++ = '\n';                        \
1571                                 *destp++ = ' ';                         \
1572                                 left = MAX_LINELEN - 1;                 \
1573                         }                                               \
1574                 }                                                       \
1575         }                                                               \
1576 }
1577
1578 void conv_encode_header_full(gchar *dest, gint len, const gchar *src,
1579                         gint header_len, gboolean addr_field,
1580                         const gchar *out_encoding_)
1581 {
1582         const gchar *cur_encoding;
1583         const gchar *out_encoding;
1584         gint mimestr_len;
1585         gchar *mimesep_enc;
1586         gint left;
1587         const guchar *srcp = src;
1588         guchar *destp = dest;
1589         gboolean use_base64;
1590
1591         g_return_if_fail(g_utf8_validate(src, -1, NULL) == TRUE);
1592
1593         if (MB_CUR_MAX > 1) {
1594                 use_base64 = TRUE;
1595                 mimesep_enc = "?B?";
1596         } else {
1597                 use_base64 = FALSE;
1598                 mimesep_enc = "?Q?";
1599         }
1600
1601         cur_encoding = CS_INTERNAL;
1602
1603         if (out_encoding_)
1604                 out_encoding = out_encoding_;
1605         else
1606                 out_encoding = conv_get_outgoing_charset_str();
1607
1608         if (!strcmp(out_encoding, CS_US_ASCII))
1609                 out_encoding = CS_ISO_8859_1;
1610
1611         mimestr_len = strlen(MIMESEP_BEGIN) + strlen(out_encoding) +
1612                 strlen(mimesep_enc) + strlen(MIMESEP_END);
1613
1614         left = MAX_LINELEN - header_len;
1615
1616         while (*srcp) {
1617                 LBREAK_IF_REQUIRED(left <= 0, TRUE);
1618
1619                 while (isspace(*srcp)) {
1620                         *destp++ = *srcp++;
1621                         left--;
1622                         LBREAK_IF_REQUIRED(left <= 0, TRUE);
1623                 }
1624
1625                 /* output as it is if the next word is ASCII string */
1626                 if (!is_next_nonascii(srcp)) {
1627                         gint word_len;
1628
1629                         word_len = get_next_word_len(srcp);
1630                         LBREAK_IF_REQUIRED(left < word_len, TRUE);
1631                         while (word_len > 0) {
1632                                 LBREAK_IF_REQUIRED(left + (MAX_HARD_LINELEN - MAX_LINELEN) <= 0, TRUE)
1633                                 *destp++ = *srcp++;
1634                                 left--;
1635                                 word_len--;
1636                         }
1637
1638                         continue;
1639                 }
1640
1641                 /* don't include parentheses in encoded strings */
1642                 if (addr_field && (*srcp == '(' || *srcp == ')')) {
1643                         LBREAK_IF_REQUIRED(left < 2, FALSE);
1644                         *destp++ = *srcp++;
1645                         left--;
1646                 }
1647
1648                 while (1) {
1649                         gint mb_len = 0;
1650                         gint cur_len = 0;
1651                         gchar *part_str;
1652                         gchar *out_str;
1653                         gchar *enc_str;
1654                         const guchar *p = srcp;
1655                         gint out_str_len;
1656                         gint out_enc_str_len;
1657                         gint mime_block_len;
1658                         gboolean cont = FALSE;
1659
1660                         while (*p != '\0') {
1661                                 if (isspace(*p) && !is_next_nonascii(p + 1))
1662                                         break;
1663                                 /* don't include parentheses in encoded
1664                                    strings */
1665                                 if (addr_field && (*p == '(' || *p == ')'))
1666                                         break;
1667
1668                                 mb_len = g_utf8_skip[*p];
1669
1670                                 Xstrndup_a(part_str, srcp, cur_len + mb_len, );
1671                                 out_str = conv_codeset_strdup
1672                                         (part_str, cur_encoding, out_encoding);
1673                                 if (!out_str) {
1674                                         if (strict_mode) {
1675                                                 *dest = '\0';
1676                                                 return;
1677                                         } else {
1678                                                 g_warning("conv_encode_header(): code conversion failed\n");
1679                                                 conv_unreadable_8bit(part_str);
1680                                                 out_str = g_strdup(part_str);
1681                                         }
1682                                 }
1683                                 out_str_len = strlen(out_str);
1684
1685                                 if (use_base64)
1686                                         out_enc_str_len = B64LEN(out_str_len);
1687                                 else
1688                                         out_enc_str_len =
1689                                                 qp_get_q_encoding_len(out_str);
1690
1691                                 g_free(out_str);
1692
1693                                 if (mimestr_len + out_enc_str_len <= left) {
1694                                         cur_len += mb_len;
1695                                         p += mb_len;
1696                                 } else if (cur_len == 0) {
1697                                         LBREAK_IF_REQUIRED(1, FALSE);
1698                                         continue;
1699                                 } else {
1700                                         cont = TRUE;
1701                                         break;
1702                                 }
1703                         }
1704
1705                         if (cur_len > 0) {
1706                                 Xstrndup_a(part_str, srcp, cur_len, );
1707                                 out_str = conv_codeset_strdup
1708                                         (part_str, cur_encoding, out_encoding);
1709                                 if (!out_str) {
1710                                         g_warning("conv_encode_header(): code conversion failed\n");
1711                                         conv_unreadable_8bit(part_str);
1712                                         out_str = g_strdup(part_str);
1713                                 }
1714                                 out_str_len = strlen(out_str);
1715
1716                                 if (use_base64)
1717                                         out_enc_str_len = B64LEN(out_str_len);
1718                                 else
1719                                         out_enc_str_len =
1720                                                 qp_get_q_encoding_len(out_str);
1721
1722                                 Xalloca(enc_str, out_enc_str_len + 1, );
1723                                 if (use_base64)
1724                                         base64_encode(enc_str, out_str, out_str_len);
1725                                 else
1726                                         qp_q_encode(enc_str, out_str);
1727
1728                                 g_free(out_str);
1729
1730                                 /* output MIME-encoded string block */
1731                                 mime_block_len = mimestr_len + strlen(enc_str);
1732                                 g_snprintf(destp, mime_block_len + 1,
1733                                            MIMESEP_BEGIN "%s%s%s" MIMESEP_END,
1734                                            out_encoding, mimesep_enc, enc_str);
1735                                 destp += mime_block_len;
1736                                 srcp += cur_len;
1737
1738                                 left -= mime_block_len;
1739                         }
1740
1741                         LBREAK_IF_REQUIRED(cont, FALSE);
1742
1743                         if (cur_len == 0)
1744                                 break;
1745                 }
1746         }
1747
1748         *destp = '\0';
1749 }
1750
1751 void conv_encode_header(gchar *dest, gint len, const gchar *src,
1752                         gint header_len, gboolean addr_field)
1753 {
1754         conv_encode_header_full(dest,len,src,header_len,addr_field,NULL);
1755 }
1756
1757 #undef LBREAK_IF_REQUIRED
1758 gchar *conv_filename_from_utf8(const gchar *utf8_file)
1759 {
1760         gchar *fs_file;
1761         GError *error = NULL;
1762
1763         fs_file = g_filename_from_utf8(utf8_file, -1, NULL, NULL, &error);
1764         if (error) {
1765                 g_warning("failed to convert encoding of file name: %s\n",
1766                           error->message);
1767                 g_error_free(error);
1768         }
1769         if (!fs_file)
1770                 fs_file = g_strdup(utf8_file);
1771
1772         return fs_file;
1773 }
1774
1775 gchar *conv_filename_to_utf8(const gchar *fs_file)
1776 {
1777         gchar *utf8_file = NULL;
1778         GError *error = NULL;
1779
1780         utf8_file = g_filename_to_utf8(fs_file, -1, NULL, NULL, &error);
1781         if (error) {
1782                 g_warning("failed to convert encoding of file name: %s\n",
1783                           error->message);
1784                 g_error_free(error);
1785         }
1786
1787         if (!utf8_file || !g_utf8_validate(utf8_file, -1, NULL)) {
1788                 g_free(utf8_file);
1789                 utf8_file = g_strdup(fs_file);
1790                 conv_unreadable_8bit(utf8_file);
1791         }
1792
1793         return utf8_file;
1794 }