src/codeconv.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 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 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <string.h>
  30 #include <ctype.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33
  34 #if HAVE_LOCALE_H
  35 #  include <locale.h>
  36 #endif
  37
  38 #include "codeconv.h"
  39 #include "unmime.h"
  40 #include "base64.h"
  41 #include "quoted-printable.h"
  42 #include "utils.h"
  43 #include "prefs_common.h"
  44
  45 /* For unknown reasons the inconv.m4 macro undefs that macro if no
  46    const is needed.  This would break the code below so we define it. */
  47 #ifndef ICONV_CONST
  48 #define ICONV_CONST
  49 #endif
  50
  51 typedef enum
  52 {
  53         JIS_ASCII,
  54         JIS_KANJI,
  55         JIS_HWKANA,
  56         JIS_AUXKANJI
  57 } JISState;
  58
  59 #define SUBST_CHAR      0x5f;
  60 #define ESC             '\033'
  61
  62 #define iseuckanji(c) \
  63         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xfe)
  64 #define iseuchwkana1(c) \
  65         (((c) & 0xff) == 0x8e)
  66 #define iseuchwkana2(c) \
  67         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
  68 #define iseucaux(c) \
  69         (((c) & 0xff) == 0x8f)
  70 #define issjiskanji1(c) \
  71         ((((c) & 0xff) >= 0x81 && ((c) & 0xff) <= 0x9f) || \
  72          (((c) & 0xff) >= 0xe0 && ((c) & 0xff) <= 0xfc))
  73 #define issjiskanji2(c) \
  74         ((((c) & 0xff) >= 0x40 && ((c) & 0xff) <= 0x7e) || \
  75          (((c) & 0xff) >= 0x80 && ((c) & 0xff) <= 0xfc))
  76 #define issjishwkana(c) \
  77         (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
  78
  79 #define K_IN()                          \
  80         if (state != JIS_KANJI) {       \
  81                 *out++ = ESC;           \
  82                 *out++ = '$';           \
  83                 *out++ = 'B';           \
  84                 state = JIS_KANJI;      \
  85         }
  86
  87 #define K_OUT()                         \
  88         if (state != JIS_ASCII) {       \
  89                 *out++ = ESC;           \
  90                 *out++ = '(';           \
  91                 *out++ = 'B';           \
  92                 state = JIS_ASCII;      \
  93         }
  94
  95 #define HW_IN()                         \
  96         if (state != JIS_HWKANA) {      \
  97                 *out++ = ESC;           \
  98                 *out++ = '(';           \
  99                 *out++ = 'I';           \
 100                 state = JIS_HWKANA;     \
 101         }
 102
 103 #define AUX_IN()                        \
 104         if (state != JIS_AUXKANJI) {    \
 105                 *out++ = ESC;           \
 106                 *out++ = '$';           \
 107                 *out++ = '(';           \
 108                 *out++ = 'D';           \
 109                 state = JIS_AUXKANJI;   \
 110         }
 111
 112 static CodeConvFunc conv_get_code_conv_func     (const gchar    *src_charset_str,
 113                                          const gchar    *dest_charset_str);
 114
 115 static gchar *conv_iconv_strdup_with_cd (const gchar    *inbuf,
 116                                          iconv_t         cd);
 117
 118 static gchar *conv_iconv_strdup         (const gchar    *inbuf,
 119                                          const gchar    *src_code,
 120                                          const gchar    *dest_code);
 121
 122 static CharSet conv_get_locale_charset                  (void);
 123 static CharSet conv_get_outgoing_charset                (void);
 124 static CharSet conv_guess_ja_encoding(const gchar *str);
 125 static gboolean conv_is_ja_locale                       (void);
 126
 127 static gint conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 128 static gint conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf);
 129 static gint conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 130
 131 static gint conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 132 static gint conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 133 static gint conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 134 static gint conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
 135
 136 static gint conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
 137 static gint conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf);
 138
 139 static void conv_unreadable_8bit(gchar *str);
 140
 141 static gint conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 142 static gint conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 143 static gint conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 144
 145 static gint conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 146 static gint conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
 147 static gint conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf);
 148
 149 static gboolean strict_mode = FALSE;
 150
 151 void codeconv_set_strict(gboolean mode)
 152 {
 153         strict_mode = mode;
 154 }
 155
 156 static gint conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 157 {
 158         const guchar *in = inbuf;
 159         guchar *out = outbuf;
 160         JISState state = JIS_ASCII;
 161
 162         while (*in != '\0') {
 163                 if (*in == ESC) {
 164                         in++;
 165                         if (*in == '$') {
 166                                 if (*(in + 1) == '@' || *(in + 1) == 'B') {
 167                                         state = JIS_KANJI;
 168                                         in += 2;
 169                                 } else if (*(in + 1) == '(' &&
 170                                            *(in + 2) == 'D') {
 171                                         state = JIS_AUXKANJI;
 172                                         in += 3;
 173                                 } else {
 174                                         /* unknown escape sequence */
 175                                         state = JIS_ASCII;
 176                                 }
 177                         } else if (*in == '(') {
 178                                 if (*(in + 1) == 'B' || *(in + 1) == 'J') {
 179                                         state = JIS_ASCII;
 180                                         in += 2;
 181                                 } else if (*(in + 1) == 'I') {
 182                                         state = JIS_HWKANA;
 183                                         in += 2;
 184                                 } else {
 185                                         /* unknown escape sequence */
 186                                         state = JIS_ASCII;
 187                                 }
 188                         } else {
 189                                 /* unknown escape sequence */
 190                                 state = JIS_ASCII;
 191                         }
 192                 } else if (*in == 0x0e) {
 193                         state = JIS_HWKANA;
 194                         in++;
 195                 } else if (*in == 0x0f) {
 196                         state = JIS_ASCII;
 197                         in++;
 198                 } else {
 199                         switch (state) {
 200                         case JIS_ASCII:
 201                                 *out++ = *in++;
 202                                 break;
 203                         case JIS_KANJI:
 204                                 *out++ = *in++ | 0x80;
 205                                 if (*in == '\0') break;
 206                                 *out++ = *in++ | 0x80;
 207                                 break;
 208                         case JIS_HWKANA:
 209                                 *out++ = 0x8e;
 210                                 *out++ = *in++ | 0x80;
 211                                 break;
 212                         case JIS_AUXKANJI:
 213                                 *out++ = 0x8f;
 214                                 *out++ = *in++ | 0x80;
 215                                 if (*in == '\0') break;
 216                                 *out++ = *in++ | 0x80;
 217                                 break;
 218                         }
 219                 }
 220         }
 221
 222         *out = '\0';
 223         return 0;
 224 }
 225
 226 #define JIS_HWDAKUTEN           0x5e
 227 #define JIS_HWHANDAKUTEN        0x5f
 228
 229 static gint conv_jis_hantozen(guchar *outbuf, guchar jis_code, guchar sound_sym)
 230 {
 231         static guint16 h2z_tbl[] = {
 232                 /* 0x20 - 0x2f */
 233                 0x0000, 0x2123, 0x2156, 0x2157, 0x2122, 0x2126, 0x2572, 0x2521,
 234                 0x2523, 0x2525, 0x2527, 0x2529, 0x2563, 0x2565, 0x2567, 0x2543,
 235                 /* 0x30 - 0x3f */
 236                 0x213c, 0x2522, 0x2524, 0x2526, 0x2528, 0x252a, 0x252b, 0x252d,
 237                 0x252f, 0x2531, 0x2533, 0x2535, 0x2537, 0x2539, 0x253b, 0x253d,
 238                 /* 0x40 - 0x4f */
 239                 0x253f, 0x2541, 0x2544, 0x2546, 0x2548, 0x254a, 0x254b, 0x254c,
 240                 0x254d, 0x254e, 0x254f, 0x2552, 0x2555, 0x2558, 0x255b, 0x255e,
 241                 /* 0x50 - 0x5f */
 242                 0x255f, 0x2560, 0x2561, 0x2562, 0x2564, 0x2566, 0x2568, 0x2569,
 243                 0x256a, 0x256b, 0x256c, 0x256d, 0x256f, 0x2573, 0x212b, 0x212c
 244         };
 245
 246         static guint16 dakuten_tbl[] = {
 247                 /* 0x30 - 0x3f */
 248                 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x252c, 0x252e,
 249                 0x2530, 0x2532, 0x2534, 0x2536, 0x2538, 0x253a, 0x253c, 0x253e,
 250                 /* 0x40 - 0x4f */
 251                 0x2540, 0x2542, 0x2545, 0x2547, 0x2549, 0x0000, 0x0000, 0x0000,
 252                 0x0000, 0x0000, 0x2550, 0x2553, 0x2556, 0x2559, 0x255c, 0x0000
 253         };
 254
 255         static guint16 handakuten_tbl[] = {
 256                 /* 0x4a - 0x4e */
 257                 0x2551, 0x2554, 0x2557, 0x255a, 0x255d
 258         };
 259
 260         guint16 out_code;
 261
 262         jis_code &= 0x7f;
 263         sound_sym &= 0x7f;
 264
 265         if (jis_code < 0x21 || jis_code > 0x5f)
 266                 return 0;
 267
 268         if (sound_sym == JIS_HWDAKUTEN &&
 269             jis_code >= 0x36 && jis_code <= 0x4e) {
 270                 out_code = dakuten_tbl[jis_code - 0x30];
 271                 if (out_code != 0) {
 272                         *outbuf = out_code >> 8;
 273                         *(outbuf + 1) = out_code & 0xff;
 274                         return 2;
 275                 }
 276         }
 277
 278         if (sound_sym == JIS_HWHANDAKUTEN &&
 279             jis_code >= 0x4a && jis_code <= 0x4e) {
 280                 out_code = handakuten_tbl[jis_code - 0x4a];
 281                 *outbuf = out_code >> 8;
 282                 *(outbuf + 1) = out_code & 0xff;
 283                 return 2;
 284         }
 285
 286         out_code = h2z_tbl[jis_code - 0x20];
 287         *outbuf = out_code >> 8;
 288         *(outbuf + 1) = out_code & 0xff;
 289         return 1;
 290 }
 291
 292 static gint conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 293 {
 294         const guchar *in = inbuf;
 295         guchar *out = outbuf;
 296         JISState state = JIS_ASCII;
 297
 298         while (*in != '\0') {
 299                 if (IS_ASCII(*in)) {
 300                         K_OUT();
 301                         *out++ = *in++;
 302                 } else if (iseuckanji(*in)) {
 303                         if (iseuckanji(*(in + 1))) {
 304                                 K_IN();
 305                                 *out++ = *in++ & 0x7f;
 306                                 *out++ = *in++ & 0x7f;
 307                         } else {
 308                                 K_OUT();
 309                                 *out++ = SUBST_CHAR;
 310                                 in++;
 311                                 if (*in != '\0' && !IS_ASCII(*in)) {
 312                                         *out++ = SUBST_CHAR;
 313                                         in++;
 314                                 }
 315                         }
 316                 } else if (iseuchwkana1(*in)) {
 317                         if (iseuchwkana2(*(in + 1))) {
 318                                 if (prefs_common.allow_jisx0201_kana) {
 319                                         HW_IN();
 320                                         in++;
 321                                         *out++ = *in++ & 0x7f;
 322                                 } else {
 323                                         guchar jis_ch[2];
 324                                         gint len;
 325
 326                                         if (iseuchwkana1(*(in + 2)) &&
 327                                             iseuchwkana2(*(in + 3)))
 328                                                 len = conv_jis_hantozen
 329                                                         (jis_ch,
 330                                                          *(in + 1), *(in + 3));
 331                                         else
 332                                                 len = conv_jis_hantozen
 333                                                         (jis_ch,
 334                                                          *(in + 1), '\0');
 335                                         if (len == 0)
 336                                                 in += 2;
 337                                         else {
 338                                                 K_IN();
 339                                                 in += len * 2;
 340                                                 *out++ = jis_ch[0];
 341                                                 *out++ = jis_ch[1];
 342                                         }
 343                                 }
 344                         } else {
 345                                 K_OUT();
 346                                 in++;
 347                                 if (*in != '\0' && !IS_ASCII(*in)) {
 348                                         *out++ = SUBST_CHAR;
 349                                         in++;
 350                                 }
 351                         }
 352                 } else if (iseucaux(*in)) {
 353                         in++;
 354                         if (iseuckanji(*in) && iseuckanji(*(in + 1))) {
 355                                 AUX_IN();
 356                                 *out++ = *in++ & 0x7f;
 357                                 *out++ = *in++ & 0x7f;
 358                         } else {
 359                                 K_OUT();
 360                                 if (*in != '\0' && !IS_ASCII(*in)) {
 361                                         *out++ = SUBST_CHAR;
 362                                         in++;
 363                                         if (*in != '\0' && !IS_ASCII(*in)) {
 364                                                 *out++ = SUBST_CHAR;
 365                                                 in++;
 366                                         }
 367                                 }
 368                         }
 369                 } else {
 370                         K_OUT();
 371                         *out++ = SUBST_CHAR;
 372                         in++;
 373                 }
 374         }
 375
 376         K_OUT();
 377         *out = '\0';
 378         return 0;
 379 }
 380
 381 static gint conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 382 {
 383         const guchar *in = inbuf;
 384         guchar *out = outbuf;
 385
 386         while (*in != '\0') {
 387                 if (IS_ASCII(*in)) {
 388                         *out++ = *in++;
 389                 } else if (issjiskanji1(*in)) {
 390                         if (issjiskanji2(*(in + 1))) {
 391                                 guchar out1 = *in;
 392                                 guchar out2 = *(in + 1);
 393                                 guchar row;
 394
 395                                 row = out1 < 0xa0 ? 0x70 : 0xb0;
 396                                 if (out2 < 0x9f) {
 397                                         out1 = (out1 - row) * 2 - 1;
 398                                         out2 -= out2 > 0x7f ? 0x20 : 0x1f;
 399                                 } else {
 400                                         out1 = (out1 - row) * 2;
 401                                         out2 -= 0x7e;
 402                                 }
 403
 404                                 *out++ = out1 | 0x80;
 405                                 *out++ = out2 | 0x80;
 406                                 in += 2;
 407                         } else {
 408                                 *out++ = SUBST_CHAR;
 409                                 in++;
 410                                 if (*in != '\0' && !IS_ASCII(*in)) {
 411                                         *out++ = SUBST_CHAR;
 412                                         in++;
 413                                 }
 414                         }
 415                 } else if (issjishwkana(*in)) {
 416                         *out++ = 0x8e;
 417                         *out++ = *in++;
 418                 } else {
 419                         *out++ = SUBST_CHAR;
 420                         in++;
 421                 }
 422         }
 423
 424         *out = '\0';
 425         return 0;
 426 }
 427
 428 static gint conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 429 {
 430         gchar *eucstr;
 431
 432         Xalloca(eucstr, outlen, return -1);
 433
 434         if (conv_jistoeuc(eucstr, outlen, inbuf) <0)
 435                 return -1;
 436         if (conv_euctoutf8(outbuf, outlen, eucstr) < 0)
 437                 return -1;
 438         return 0;
 439 }
 440
 441 static gint conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 442 {
 443         gchar *tmpstr;
 444
 445         tmpstr = conv_iconv_strdup(inbuf, CS_SHIFT_JIS, CS_UTF_8);
 446         if (tmpstr) {
 447                 strncpy2(outbuf, tmpstr, outlen);
 448                 g_free(tmpstr);
 449                 return 0;
 450         } else {
 451                 strncpy2(outbuf, inbuf, outlen);
 452                 return -1;
 453         }
 454 }
 455
 456 static gint conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 457 {
 458         static iconv_t cd = (iconv_t)-1;
 459         static gboolean iconv_ok = TRUE;
 460         gchar *tmpstr;
 461
 462         if (cd == (iconv_t)-1) {
 463                 if (!iconv_ok) {
 464                         strncpy2(outbuf, inbuf, outlen);
 465                         return -1;
 466                 }
 467                 cd = iconv_open(CS_UTF_8, CS_EUC_JP_MS);
 468                 if (cd == (iconv_t)-1) {
 469                         cd = iconv_open(CS_UTF_8, CS_EUC_JP);
 470                         if (cd == (iconv_t)-1) {
 471                                 g_warning("conv_euctoutf8(): %s\n",
 472                                           g_strerror(errno));
 473                                 iconv_ok = FALSE;
 474                                 strncpy2(outbuf, inbuf, outlen);
 475                                 return -1;
 476                         }
 477                 }
 478         }
 479
 480         tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
 481         if (tmpstr) {
 482                 strncpy2(outbuf, tmpstr, outlen);
 483                 g_free(tmpstr);
 484                 return 0;
 485         } else {
 486                 strncpy2(outbuf, inbuf, outlen);
 487                 return -1;
 488         }
 489 }
 490
 491 static gint conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
 492 {
 493         gint r = -1;
 494         switch (conv_guess_ja_encoding(inbuf)) {
 495         case C_ISO_2022_JP:
 496                 r = conv_jistoutf8(outbuf, outlen, inbuf);
 497                 break;
 498         case C_SHIFT_JIS:
 499                 r = conv_sjistoutf8(outbuf, outlen, inbuf);
 500                 break;
 501         case C_EUC_JP:
 502                 r = conv_euctoutf8(outbuf, outlen, inbuf);
 503                 break;
 504         default:
 505                 r = 0;
 506                 strncpy2(outbuf, inbuf, outlen);
 507                 break;
 508         }
 509
 510         return r;
 511 }
 512
 513 static gint conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
 514 {
 515         static iconv_t cd = (iconv_t)-1;
 516         static gboolean iconv_ok = TRUE;
 517         gchar *tmpstr;
 518
 519         if (cd == (iconv_t)-1) {
 520                 if (!iconv_ok) {
 521                         strncpy2(outbuf, inbuf, outlen);
 522                         return -1;
 523                 }
 524                 cd = iconv_open(CS_EUC_JP_MS, CS_UTF_8);
 525                 if (cd == (iconv_t)-1) {
 526                         cd = iconv_open(CS_EUC_JP, CS_UTF_8);
 527                         if (cd == (iconv_t)-1) {
 528                                 g_warning("conv_utf8toeuc(): %s\n",
 529                                           g_strerror(errno));
 530                                 iconv_ok = FALSE;
 531                                 strncpy2(outbuf, inbuf, outlen);
 532                                 return -1;
 533                         }
 534                 }
 535         }
 536
 537         tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
 538         if (tmpstr) {
 539                 strncpy2(outbuf, tmpstr, outlen);
 540                 g_free(tmpstr);
 541                 return 0;
 542         } else {
 543                 strncpy2(outbuf, inbuf, outlen);
 544                 return -1;
 545         }
 546 }
 547
 548 static gint conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf)
 549 {
 550         gchar *eucstr;
 551
 552         Xalloca(eucstr, outlen, return -1);
 553
 554         if (conv_utf8toeuc(eucstr, outlen, inbuf) < 0)
 555                 return -1;
 556         if (conv_euctojis(outbuf, outlen, eucstr) < 0)
 557                 return -1;
 558
 559         return 0;
 560 }
 561
 562 static void conv_unreadable_8bit(gchar *str)
 563 {
 564         register guchar *p = str;
 565
 566         while (*p != '\0') {
 567                 /* convert CR+LF -> LF */
 568                 if (*p == '\r' && *(p + 1) == '\n')
 569                         memmove(p, p + 1, strlen(p));
 570                 else if (!IS_ASCII(*p)) *p = SUBST_CHAR;
 571                 p++;
 572         }
 573 }
 574
 575 static CharSet conv_guess_ja_encoding(const gchar *str)
 576 {
 577         const guchar *p = str;
 578         CharSet guessed = C_US_ASCII;
 579
 580         while (*p != '\0') {
 581                 if (*p == ESC && (*(p + 1) == '$' || *(p + 1) == '(')) {
 582                         if (guessed == C_US_ASCII)
 583                                 return C_ISO_2022_JP;
 584                         p += 2;
 585                 } else if (IS_ASCII(*p)) {
 586                         p++;
 587                 } else if (iseuckanji(*p) && iseuckanji(*(p + 1))) {
 588                         if (*p >= 0xfd && *p <= 0xfe)
 589                                 return C_EUC_JP;
 590                         else if (guessed == C_SHIFT_JIS) {
 591                                 if ((issjiskanji1(*p) &&
 592                                      issjiskanji2(*(p + 1))) ||
 593                                     issjishwkana(*p))
 594                                         guessed = C_SHIFT_JIS;
 595                                 else
 596                                         guessed = C_EUC_JP;
 597                         } else
 598                                 guessed = C_EUC_JP;
 599                         p += 2;
 600                 } else if (issjiskanji1(*p) && issjiskanji2(*(p + 1))) {
 601                         if (iseuchwkana1(*p) && iseuchwkana2(*(p + 1)))
 602                                 guessed = C_SHIFT_JIS;
 603                         else
 604                                 return C_SHIFT_JIS;
 605                         p += 2;
 606                 } else if (issjishwkana(*p)) {
 607                         guessed = C_SHIFT_JIS;
 608                         p++;
 609                 } else {
 610                         p++;
 611                 }
 612         }
 613
 614         return guessed;
 615 }
 616
 617 static gint conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 618 {
 619         return conv_jistoutf8(outbuf, outlen, inbuf);
 620 }
 621
 622 static gint conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 623 {
 624         return conv_sjistoutf8(outbuf, outlen, inbuf);
 625 }
 626
 627 static gint conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 628 {
 629         return conv_euctoutf8(outbuf, outlen, inbuf);
 630 }
 631
 632 void conv_utf8todisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 633 {
 634         if (g_utf8_validate(inbuf, -1, NULL) == TRUE)
 635                 strncpy2(outbuf, inbuf, outlen);
 636         else
 637                 conv_ustodisp(outbuf, outlen, inbuf);
 638 }
 639
 640 static gint conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 641 {
 642         gint r = 0;
 643         if (conv_anytoutf8(outbuf, outlen, inbuf) < 0)
 644                 r = -1;
 645         if (g_utf8_validate(outbuf, -1, NULL) != TRUE)
 646                 conv_unreadable_8bit(outbuf);
 647         return r;
 648 }
 649
 650 static gint conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 651 {
 652         strncpy2(outbuf, inbuf, outlen);
 653         conv_unreadable_8bit(outbuf);
 654
 655         return 0;
 656 }
 657
 658 void conv_localetodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
 659 {
 660         gchar *tmpstr;
 661
 662         codeconv_set_strict(TRUE);
 663         tmpstr = conv_iconv_strdup(inbuf, conv_get_locale_charset_str(),
 664                                    CS_INTERNAL);
 665         codeconv_set_strict(FALSE);
 666         if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
 667                 strncpy2(outbuf, tmpstr, outlen);
 668                 g_free(tmpstr);
 669                 return;
 670         } else if (tmpstr && !g_utf8_validate(tmpstr, -1, NULL)) {
 671                 g_free(tmpstr);
 672                 codeconv_set_strict(TRUE);
 673                 tmpstr = conv_iconv_strdup(inbuf,
 674                                 conv_get_locale_charset_str_no_utf8(),
 675                                 CS_INTERNAL);
 676                 codeconv_set_strict(FALSE);
 677         }
 678         if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
 679                 strncpy2(outbuf, tmpstr, outlen);
 680                 g_free(tmpstr);
 681                 return;
 682         } else {
 683                 g_free(tmpstr);
 684                 conv_utf8todisp(outbuf, outlen, inbuf);
 685         }
 686 }
 687
 688 static gint conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf)
 689 {
 690         strncpy2(outbuf, inbuf, outlen);
 691         return 0;
 692 }
 693
 694 static const gchar *
 695 conv_get_fallback_for_private_encoding(const gchar *encoding)
 696 {
 697         if (encoding && (encoding[0] == 'X' || encoding[0] == 'x') &&
 698             encoding[1] == '-') {
 699                 if (!g_ascii_strcasecmp(encoding, CS_X_GBK))
 700                         return CS_GBK;
 701         }
 702
 703         return encoding;
 704 }
 705
 706 CodeConverter *conv_code_converter_new(const gchar *src_charset)
 707 {
 708         CodeConverter *conv;
 709
 710         src_charset = conv_get_fallback_for_private_encoding(src_charset);
 711
 712         conv = g_new0(CodeConverter, 1);
 713         conv->code_conv_func = conv_get_code_conv_func(src_charset, NULL);
 714         conv->charset_str = g_strdup(src_charset);
 715         conv->charset = conv_get_charset_from_str(src_charset);
 716
 717         return conv;
 718 }
 719
 720 void conv_code_converter_destroy(CodeConverter *conv)
 721 {
 722         g_free(conv->charset_str);
 723         g_free(conv);
 724 }
 725
 726 gint conv_convert(CodeConverter *conv, gchar *outbuf, gint outlen,
 727                   const gchar *inbuf)
 728 {
 729         if (conv->code_conv_func != conv_noconv)
 730                 return conv->code_conv_func(outbuf, outlen, inbuf);
 731         else {
 732                 gchar *str;
 733
 734                 str = conv_iconv_strdup(inbuf, conv->charset_str, NULL);
 735                 if (!str)
 736                         return -1;
 737                 else {
 738                         strncpy2(outbuf, str, outlen);
 739                         g_free(str);
 740                 }
 741         }
 742
 743         return 0;
 744 }
 745
 746 gchar *conv_codeset_strdup(const gchar *inbuf,
 747                            const gchar *src_code, const gchar *dest_code)
 748 {
 749         gchar *buf;
 750         size_t len;
 751         CodeConvFunc conv_func;
 752
 753         if (!strcmp2(src_code, dest_code))
 754                 return g_strdup(inbuf);
 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_ustodisp && strict_mode && !is_ascii_str(inbuf))
 759                 return NULL;
 760
 761         if (conv_func != conv_noconv) {
 762                 len = (strlen(inbuf) + 1) * 3;
 763                 buf = g_malloc(len);
 764                 if (!buf) return NULL;
 765
 766                 if (conv_func(buf, len, inbuf) == 0 || !strict_mode)
 767                         return g_realloc(buf, strlen(buf) + 1);
 768                 else {
 769                         g_free(buf);
 770                         return NULL;
 771                 }
 772         }
 773
 774         return conv_iconv_strdup(inbuf, src_code, dest_code);
 775 }
 776
 777 static CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
 778                                      const gchar *dest_charset_str)
 779 {
 780         CodeConvFunc code_conv = conv_noconv;
 781         CharSet src_charset;
 782         CharSet dest_charset;
 783
 784         if (!src_charset_str)
 785                 src_charset = conv_get_locale_charset();
 786         else
 787                 src_charset = conv_get_charset_from_str(src_charset_str);
 788
 789         /* auto detection mode */
 790         if (!src_charset_str && !dest_charset_str) {
 791                 if (conv_is_ja_locale())
 792                         return conv_anytodisp;
 793                 else
 794                         return conv_noconv;
 795         }
 796
 797         dest_charset = conv_get_charset_from_str(dest_charset_str);
 798
 799         if (dest_charset == C_US_ASCII)
 800                 return conv_ustodisp;
 801
 802         switch (src_charset) {
 803         case C_US_ASCII:
 804         case C_ISO_8859_1:
 805         case C_ISO_8859_2:
 806         case C_ISO_8859_3:
 807         case C_ISO_8859_4:
 808         case C_ISO_8859_5:
 809         case C_ISO_8859_6:
 810         case C_ISO_8859_7:
 811         case C_ISO_8859_8:
 812         case C_ISO_8859_9:
 813         case C_ISO_8859_10:
 814         case C_ISO_8859_11:
 815         case C_ISO_8859_13:
 816         case C_ISO_8859_14:
 817         case C_ISO_8859_15:
 818                 break;
 819         case C_ISO_2022_JP:
 820         case C_ISO_2022_JP_2:
 821         case C_ISO_2022_JP_3:
 822                 if (dest_charset == C_AUTO)
 823                         code_conv = conv_jistodisp;
 824                 else if (dest_charset == C_EUC_JP)
 825                         code_conv = conv_jistoeuc;
 826                 else if (dest_charset == C_UTF_8)
 827                         code_conv = conv_jistoutf8;
 828                 break;
 829         case C_SHIFT_JIS:
 830                 if (dest_charset == C_AUTO)
 831                         code_conv = conv_sjistodisp;
 832                 else if (dest_charset == C_EUC_JP)
 833                         code_conv = conv_sjistoeuc;
 834                 else if (dest_charset == C_UTF_8)
 835                         code_conv = conv_sjistoutf8;
 836                 break;
 837         case C_EUC_JP:
 838                 if (dest_charset == C_AUTO)
 839                         code_conv = conv_euctodisp;
 840                 else if (dest_charset == C_ISO_2022_JP   ||
 841                          dest_charset == C_ISO_2022_JP_2 ||
 842                          dest_charset == C_ISO_2022_JP_3)
 843                         code_conv = conv_euctojis;
 844                 else if (dest_charset == C_UTF_8)
 845                         code_conv = conv_euctoutf8;
 846                 break;
 847         case C_UTF_8:
 848                 if (dest_charset == C_EUC_JP)
 849                         code_conv = conv_utf8toeuc;
 850                 else if (dest_charset == C_ISO_2022_JP   ||
 851                          dest_charset == C_ISO_2022_JP_2 ||
 852                          dest_charset == C_ISO_2022_JP_3)
 853                         code_conv = conv_utf8tojis;
 854                 break;
 855         default:
 856                 break;
 857         }
 858
 859         return code_conv;
 860 }
 861
 862 static gchar *conv_iconv_strdup(const gchar *inbuf,
 863                          const gchar *src_code, const gchar *dest_code)
 864 {
 865         iconv_t cd;
 866         gchar *outbuf;
 867
 868         if (!src_code && !dest_code &&
 869             g_utf8_validate(inbuf, -1, NULL))
 870                 return g_strdup(inbuf);
 871
 872         if (!src_code)
 873                 src_code = conv_get_outgoing_charset_str();
 874         if (!dest_code)
 875                 dest_code = CS_INTERNAL;
 876
 877         /* don't convert if src and dest codeset are identical */
 878         if (!strcasecmp(src_code, dest_code))
 879                 return g_strdup(inbuf);
 880
 881         /* don't convert if dest codeset is US-ASCII */
 882         if (!strcasecmp(src_code, CS_US_ASCII))
 883                 return g_strdup(inbuf);
 884
 885         /* don't convert if dest codeset is US-ASCII */
 886         if (!strcasecmp(dest_code, CS_US_ASCII))
 887                 return g_strdup(inbuf);
 888
 889         cd = iconv_open(dest_code, src_code);
 890         if (cd == (iconv_t)-1)
 891                 return NULL;
 892
 893         outbuf = conv_iconv_strdup_with_cd(inbuf, cd);
 894
 895         iconv_close(cd);
 896
 897         return outbuf;
 898 }
 899
 900 gchar *conv_iconv_strdup_with_cd(const gchar *inbuf, iconv_t cd)
 901 {
 902         const gchar *inbuf_p;
 903         gchar *outbuf;
 904         gchar *outbuf_p;
 905         size_t in_size;
 906         size_t in_left;
 907         size_t out_size;
 908         size_t out_left;
 909         size_t n_conv;
 910         size_t len;
 911
 912         inbuf_p = inbuf;
 913         in_size = strlen(inbuf);
 914         in_left = in_size;
 915         out_size = (in_size + 1) * 2;
 916         outbuf = g_malloc(out_size);
 917         outbuf_p = outbuf;
 918         out_left = out_size;
 919
 920 #define EXPAND_BUF()                            \
 921 {                                               \
 922         len = outbuf_p - outbuf;                \
 923         out_size *= 2;                          \
 924         outbuf = g_realloc(outbuf, out_size);   \
 925         outbuf_p = outbuf + len;                \
 926         out_left = out_size - len;              \
 927 }
 928
 929         while ((n_conv = iconv(cd, (ICONV_CONST gchar **)&inbuf_p, &in_left,
 930                                &outbuf_p, &out_left)) == (size_t)-1) {
 931                 if (EILSEQ == errno) {
 932                         if (strict_mode) {
 933                                 g_free(outbuf);
 934                                 return NULL;
 935                         }
 936                         //g_print("iconv(): at %d: %s\n", in_size - in_left, g_strerror(errno));
 937                         inbuf_p++;
 938                         in_left--;
 939                         if (out_left == 0) {
 940                                 EXPAND_BUF();
 941                         }
 942                         *outbuf_p++ = SUBST_CHAR;
 943                         out_left--;
 944                 } else if (EINVAL == errno) {
 945                         break;
 946                 } else if (E2BIG == errno) {
 947                         EXPAND_BUF();
 948                 } else {
 949                         g_warning("conv_iconv_strdup(): %s\n",
 950                                   g_strerror(errno));
 951                         break;
 952                 }
 953         }
 954
 955         while ((n_conv = iconv(cd, NULL, NULL, &outbuf_p, &out_left)) ==
 956                (size_t)-1) {
 957                 if (E2BIG == errno) {
 958                         EXPAND_BUF();
 959                 } else {
 960                         g_warning("conv_iconv_strdup(): %s\n",
 961                                   g_strerror(errno));
 962                         break;
 963                 }
 964         }
 965
 966 #undef EXPAND_BUF
 967
 968         len = outbuf_p - outbuf;
 969         outbuf = g_realloc(outbuf, len + 1);
 970         outbuf[len] = '\0';
 971
 972         return outbuf;
 973 }
 974
 975 static const struct {
 976         CharSet charset;
 977         gchar *const name;
 978 } charsets[] = {
 979         {C_US_ASCII,            CS_US_ASCII},
 980         {C_US_ASCII,            CS_ANSI_X3_4_1968},
 981         {C_UTF_8,               CS_UTF_8},
 982         {C_UTF_7,               CS_UTF_7},
 983         {C_ISO_8859_1,          CS_ISO_8859_1},
 984         {C_ISO_8859_2,          CS_ISO_8859_2},
 985         {C_ISO_8859_3,          CS_ISO_8859_3},
 986         {C_ISO_8859_4,          CS_ISO_8859_4},
 987         {C_ISO_8859_5,          CS_ISO_8859_5},
 988         {C_ISO_8859_6,          CS_ISO_8859_6},
 989         {C_ISO_8859_7,          CS_ISO_8859_7},
 990         {C_ISO_8859_8,          CS_ISO_8859_8},
 991         {C_ISO_8859_9,          CS_ISO_8859_9},
 992         {C_ISO_8859_10,         CS_ISO_8859_10},
 993         {C_ISO_8859_11,         CS_ISO_8859_11},
 994         {C_ISO_8859_13,         CS_ISO_8859_13},
 995         {C_ISO_8859_14,         CS_ISO_8859_14},
 996         {C_ISO_8859_15,         CS_ISO_8859_15},
 997         {C_BALTIC,              CS_BALTIC},
 998         {C_CP1250,              CS_CP1250},
 999         {C_CP1251,              CS_CP1251},
1000         {C_CP1252,              CS_CP1252},
1001         {C_CP1253,              CS_CP1253},
1002         {C_CP1254,              CS_CP1254},
1003         {C_CP1255,              CS_CP1255},
1004         {C_CP1256,              CS_CP1256},
1005         {C_CP1257,              CS_CP1257},
1006         {C_CP1258,              CS_CP1258},
1007         {C_WINDOWS_1250,        CS_WINDOWS_1250},
1008         {C_WINDOWS_1251,        CS_WINDOWS_1251},
1009         {C_WINDOWS_1252,        CS_WINDOWS_1252},
1010         {C_WINDOWS_1253,        CS_WINDOWS_1253},
1011         {C_WINDOWS_1254,        CS_WINDOWS_1254},
1012         {C_WINDOWS_1255,        CS_WINDOWS_1255},
1013         {C_WINDOWS_1256,        CS_WINDOWS_1256},
1014         {C_WINDOWS_1257,        CS_WINDOWS_1257},
1015         {C_WINDOWS_1258,        CS_WINDOWS_1258},
1016         {C_KOI8_R,              CS_KOI8_R},
1017         {C_KOI8_T,              CS_KOI8_T},
1018         {C_KOI8_U,              CS_KOI8_U},
1019         {C_ISO_2022_JP,         CS_ISO_2022_JP},
1020         {C_ISO_2022_JP_2,       CS_ISO_2022_JP_2},
1021         {C_ISO_2022_JP_3,       CS_ISO_2022_JP_3},
1022         {C_EUC_JP,              CS_EUC_JP},
1023         {C_EUC_JP,              CS_EUCJP},
1024         {C_EUC_JP_MS,           CS_EUC_JP_MS},
1025         {C_SHIFT_JIS,           CS_SHIFT_JIS},
1026         {C_SHIFT_JIS,           CS_SHIFT__JIS},
1027         {C_SHIFT_JIS,           CS_SJIS},
1028         {C_ISO_2022_KR,         CS_ISO_2022_KR},
1029         {C_EUC_KR,              CS_EUC_KR},
1030         {C_ISO_2022_CN,         CS_ISO_2022_CN},
1031         {C_EUC_CN,              CS_EUC_CN},
1032         {C_GB18030,             CS_GB18030},
1033         {C_GB2312,              CS_GB2312},
1034         {C_GBK,                 CS_GBK},
1035         {C_EUC_TW,              CS_EUC_TW},
1036         {C_BIG5,                CS_BIG5},
1037         {C_BIG5_HKSCS,          CS_BIG5_HKSCS},
1038         {C_TIS_620,             CS_TIS_620},
1039         {C_WINDOWS_874,         CS_WINDOWS_874},
1040         {C_GEORGIAN_PS,         CS_GEORGIAN_PS},
1041         {C_TCVN5712_1,          CS_TCVN5712_1},
1042 };
1043
1044 static const struct {
1045         gchar *const locale;
1046         CharSet charset;
1047         CharSet out_charset;
1048 } locale_table[] = {
1049         {"ja_JP.eucJP"  , C_EUC_JP      , C_ISO_2022_JP},
1050         {"ja_JP.EUC-JP" , C_EUC_JP      , C_ISO_2022_JP},
1051         {"ja_JP.EUC"    , C_EUC_JP      , C_ISO_2022_JP},
1052         {"ja_JP.ujis"   , C_EUC_JP      , C_ISO_2022_JP},
1053         {"ja_JP.SJIS"   , C_SHIFT_JIS   , C_ISO_2022_JP},
1054         {"ja_JP.JIS"    , C_ISO_2022_JP , C_ISO_2022_JP},
1055 #ifdef G_OS_WIN32
1056         {"ja_JP"        , C_SHIFT_JIS   , C_ISO_2022_JP},
1057 #else
1058         {"ja_JP"        , C_EUC_JP      , C_ISO_2022_JP},
1059 #endif
1060         {"ko_KR.EUC-KR" , C_EUC_KR      , C_EUC_KR},
1061         {"ko_KR"        , C_EUC_KR      , C_EUC_KR},
1062         {"zh_CN.GB18030"        , C_GB18030     , C_GB18030},
1063         {"zh_CN.GB2312" , C_GB2312      , C_GB2312},
1064         {"zh_CN.GBK"    , C_GBK         , C_GBK},
1065         {"zh_CN"        , C_GB18030     , C_GB18030},
1066         {"zh_HK"        , C_BIG5_HKSCS  , C_BIG5_HKSCS},
1067         {"zh_TW.eucTW"  , C_EUC_TW      , C_BIG5},
1068         {"zh_TW.EUC-TW" , C_EUC_TW      , C_BIG5},
1069         {"zh_TW.Big5"   , C_BIG5        , C_BIG5},
1070         {"zh_TW"        , C_BIG5        , C_BIG5},
1071
1072         {"ru_RU.KOI8-R" , C_KOI8_R      , C_KOI8_R},
1073         {"ru_RU.KOI8R"  , C_KOI8_R      , C_KOI8_R},
1074         {"ru_RU.CP1251" , C_WINDOWS_1251, C_KOI8_R},
1075 #ifdef G_OS_WIN32
1076         {"ru_RU"        , C_WINDOWS_1251, C_KOI8_R},
1077 #else
1078         {"ru_RU"        , C_ISO_8859_5  , C_KOI8_R},
1079 #endif
1080         {"tg_TJ"        , C_KOI8_T      , C_KOI8_T},
1081         {"ru_UA"        , C_KOI8_U      , C_KOI8_U},
1082         {"uk_UA.CP1251" , C_WINDOWS_1251, C_KOI8_U},
1083         {"uk_UA"        , C_KOI8_U      , C_KOI8_U},
1084
1085         {"be_BY"        , C_WINDOWS_1251, C_WINDOWS_1251},
1086         {"bg_BG"        , C_WINDOWS_1251, C_WINDOWS_1251},
1087
1088         {"yi_US"        , C_WINDOWS_1255, C_WINDOWS_1255},
1089
1090         {"af_ZA"        , C_ISO_8859_1  , C_ISO_8859_1},
1091         {"br_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1092         {"ca_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1093         {"da_DK"        , C_ISO_8859_1  , C_ISO_8859_1},
1094         {"de_AT"        , C_ISO_8859_1  , C_ISO_8859_1},
1095         {"de_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1096         {"de_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1097         {"de_DE"        , C_ISO_8859_1  , C_ISO_8859_1},
1098         {"de_LU"        , C_ISO_8859_1  , C_ISO_8859_1},
1099         {"en_AU"        , C_ISO_8859_1  , C_ISO_8859_1},
1100         {"en_BW"        , C_ISO_8859_1  , C_ISO_8859_1},
1101         {"en_CA"        , C_ISO_8859_1  , C_ISO_8859_1},
1102         {"en_DK"        , C_ISO_8859_1  , C_ISO_8859_1},
1103         {"en_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1104         {"en_HK"        , C_ISO_8859_1  , C_ISO_8859_1},
1105         {"en_IE"        , C_ISO_8859_1  , C_ISO_8859_1},
1106         {"en_NZ"        , C_ISO_8859_1  , C_ISO_8859_1},
1107         {"en_PH"        , C_ISO_8859_1  , C_ISO_8859_1},
1108         {"en_SG"        , C_ISO_8859_1  , C_ISO_8859_1},
1109         {"en_US"        , C_ISO_8859_1  , C_ISO_8859_1},
1110         {"en_ZA"        , C_ISO_8859_1  , C_ISO_8859_1},
1111         {"en_ZW"        , C_ISO_8859_1  , C_ISO_8859_1},
1112         {"es_AR"        , C_ISO_8859_1  , C_ISO_8859_1},
1113         {"es_BO"        , C_ISO_8859_1  , C_ISO_8859_1},
1114         {"es_CL"        , C_ISO_8859_1  , C_ISO_8859_1},
1115         {"es_CO"        , C_ISO_8859_1  , C_ISO_8859_1},
1116         {"es_CR"        , C_ISO_8859_1  , C_ISO_8859_1},
1117         {"es_DO"        , C_ISO_8859_1  , C_ISO_8859_1},
1118         {"es_EC"        , C_ISO_8859_1  , C_ISO_8859_1},
1119         {"es_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1120         {"es_GT"        , C_ISO_8859_1  , C_ISO_8859_1},
1121         {"es_HN"        , C_ISO_8859_1  , C_ISO_8859_1},
1122         {"es_MX"        , C_ISO_8859_1  , C_ISO_8859_1},
1123         {"es_NI"        , C_ISO_8859_1  , C_ISO_8859_1},
1124         {"es_PA"        , C_ISO_8859_1  , C_ISO_8859_1},
1125         {"es_PE"        , C_ISO_8859_1  , C_ISO_8859_1},
1126         {"es_PR"        , C_ISO_8859_1  , C_ISO_8859_1},
1127         {"es_PY"        , C_ISO_8859_1  , C_ISO_8859_1},
1128         {"es_SV"        , C_ISO_8859_1  , C_ISO_8859_1},
1129         {"es_US"        , C_ISO_8859_1  , C_ISO_8859_1},
1130         {"es_UY"        , C_ISO_8859_1  , C_ISO_8859_1},
1131         {"es_VE"        , C_ISO_8859_1  , C_ISO_8859_1},
1132         {"et_EE"        , C_ISO_8859_1  , C_ISO_8859_1},
1133         {"eu_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1134         {"fi_FI"        , C_ISO_8859_1  , C_ISO_8859_1},
1135         {"fo_FO"        , C_ISO_8859_1  , C_ISO_8859_1},
1136         {"fr_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1137         {"fr_CA"        , C_ISO_8859_1  , C_ISO_8859_1},
1138         {"fr_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1139         {"fr_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1140         {"fr_LU"        , C_ISO_8859_1  , C_ISO_8859_1},
1141         {"ga_IE"        , C_ISO_8859_1  , C_ISO_8859_1},
1142         {"gl_ES"        , C_ISO_8859_1  , C_ISO_8859_1},
1143         {"gv_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1144         {"id_ID"        , C_ISO_8859_1  , C_ISO_8859_1},
1145         {"is_IS"        , C_ISO_8859_1  , C_ISO_8859_1},
1146         {"it_CH"        , C_ISO_8859_1  , C_ISO_8859_1},
1147         {"it_IT"        , C_ISO_8859_1  , C_ISO_8859_1},
1148         {"kl_GL"        , C_ISO_8859_1  , C_ISO_8859_1},
1149         {"kw_GB"        , C_ISO_8859_1  , C_ISO_8859_1},
1150         {"ms_MY"        , C_ISO_8859_1  , C_ISO_8859_1},
1151         {"nl_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1152         {"nl_NL"        , C_ISO_8859_1  , C_ISO_8859_1},
1153         {"nb_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1154         {"nn_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1155         {"no_NO"        , C_ISO_8859_1  , C_ISO_8859_1},
1156         {"oc_FR"        , C_ISO_8859_1  , C_ISO_8859_1},
1157         {"pt_BR"        , C_ISO_8859_1  , C_ISO_8859_1},
1158         {"pt_PT"        , C_ISO_8859_1  , C_ISO_8859_1},
1159         {"sq_AL"        , C_ISO_8859_1  , C_ISO_8859_1},
1160         {"sv_FI"        , C_ISO_8859_1  , C_ISO_8859_1},
1161         {"sv_SE"        , C_ISO_8859_1  , C_ISO_8859_1},
1162         {"tl_PH"        , C_ISO_8859_1  , C_ISO_8859_1},
1163         {"uz_UZ"        , C_ISO_8859_1  , C_ISO_8859_1},
1164         {"wa_BE"        , C_ISO_8859_1  , C_ISO_8859_1},
1165
1166         {"bs_BA"        , C_ISO_8859_2  , C_ISO_8859_2},
1167         {"cs_CZ"        , C_ISO_8859_2  , C_ISO_8859_2},
1168         {"hr_HR"        , C_ISO_8859_2  , C_ISO_8859_2},
1169         {"hu_HU"        , C_ISO_8859_2  , C_ISO_8859_2},
1170         {"pl_PL"        , C_ISO_8859_2  , C_ISO_8859_2},
1171         {"ro_RO"        , C_ISO_8859_2  , C_ISO_8859_2},
1172         {"sk_SK"        , C_ISO_8859_2  , C_ISO_8859_2},
1173         {"sl_SI"        , C_ISO_8859_2  , C_ISO_8859_2},
1174
1175         {"sr_YU@cyrillic"       , C_ISO_8859_5  , C_ISO_8859_5},
1176         {"sr_YU"                , C_ISO_8859_2  , C_ISO_8859_2},
1177
1178         {"mt_MT"                , C_ISO_8859_3  , C_ISO_8859_3},
1179
1180         {"lt_LT.iso88594"       , C_ISO_8859_4  , C_ISO_8859_4},
1181         {"lt_LT.ISO8859-4"      , C_ISO_8859_4  , C_ISO_8859_4},
1182         {"lt_LT.ISO_8859-4"     , C_ISO_8859_4  , C_ISO_8859_4},
1183         {"lt_LT"                , C_ISO_8859_13 , C_ISO_8859_13},
1184
1185         {"mk_MK"        , C_ISO_8859_5  , C_ISO_8859_5},
1186
1187         {"ar_AE"        , C_ISO_8859_6  , C_ISO_8859_6},
1188         {"ar_BH"        , C_ISO_8859_6  , C_ISO_8859_6},
1189         {"ar_DZ"        , C_ISO_8859_6  , C_ISO_8859_6},
1190         {"ar_EG"        , C_ISO_8859_6  , C_ISO_8859_6},
1191         {"ar_IQ"        , C_ISO_8859_6  , C_ISO_8859_6},
1192         {"ar_JO"        , C_ISO_8859_6  , C_ISO_8859_6},
1193         {"ar_KW"        , C_ISO_8859_6  , C_ISO_8859_6},
1194         {"ar_LB"        , C_ISO_8859_6  , C_ISO_8859_6},
1195         {"ar_LY"        , C_ISO_8859_6  , C_ISO_8859_6},
1196         {"ar_MA"        , C_ISO_8859_6  , C_ISO_8859_6},
1197         {"ar_OM"        , C_ISO_8859_6  , C_ISO_8859_6},
1198         {"ar_QA"        , C_ISO_8859_6  , C_ISO_8859_6},
1199         {"ar_SA"        , C_ISO_8859_6  , C_ISO_8859_6},
1200         {"ar_SD"        , C_ISO_8859_6  , C_ISO_8859_6},
1201         {"ar_SY"        , C_ISO_8859_6  , C_ISO_8859_6},
1202         {"ar_TN"        , C_ISO_8859_6  , C_ISO_8859_6},
1203         {"ar_YE"        , C_ISO_8859_6  , C_ISO_8859_6},
1204
1205         {"el_GR"        , C_ISO_8859_7  , C_ISO_8859_7},
1206         {"he_IL"        , C_ISO_8859_8  , C_ISO_8859_8},
1207         {"iw_IL"        , C_ISO_8859_8  , C_ISO_8859_8},
1208         {"tr_TR"        , C_ISO_8859_9  , C_ISO_8859_9},
1209
1210         {"lv_LV"        , C_ISO_8859_13 , C_ISO_8859_13},
1211         {"mi_NZ"        , C_ISO_8859_13 , C_ISO_8859_13},
1212
1213         {"cy_GB"        , C_ISO_8859_14 , C_ISO_8859_14},
1214
1215         {"ar_IN"        , C_UTF_8       , C_UTF_8},
1216         {"en_IN"        , C_UTF_8       , C_UTF_8},
1217         {"se_NO"        , C_UTF_8       , C_UTF_8},
1218         {"ta_IN"        , C_UTF_8       , C_UTF_8},
1219         {"te_IN"        , C_UTF_8       , C_UTF_8},
1220         {"ur_PK"        , C_UTF_8       , C_UTF_8},
1221
1222         {"th_TH"        , C_TIS_620     , C_TIS_620},
1223         /* {"th_TH"     , C_WINDOWS_874}, */
1224         /* {"th_TH"     , C_ISO_8859_11}, */
1225
1226         {"ka_GE"        , C_GEORGIAN_PS , C_GEORGIAN_PS},
1227         {"vi_VN.TCVN"   , C_TCVN5712_1  , C_TCVN5712_1},
1228
1229         {"C"                    , C_US_ASCII    , C_US_ASCII},
1230         {"POSIX"                , C_US_ASCII    , C_US_ASCII},
1231         {"ANSI_X3.4-1968"       , C_US_ASCII    , C_US_ASCII},
1232 };
1233
1234 static GHashTable *conv_get_charset_to_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(NULL, g_direct_equal);
1243
1244         for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1245                 if (g_hash_table_lookup(table, GUINT_TO_POINTER(charsets[i].charset))
1246                     == NULL) {
1247                         g_hash_table_insert
1248                                 (table, GUINT_TO_POINTER(charsets[i].charset),
1249                                  charsets[i].name);
1250                 }
1251         }
1252
1253         return table;
1254 }
1255
1256 static GHashTable *conv_get_charset_from_str_table(void)
1257 {
1258         static GHashTable *table;
1259         gint i;
1260
1261         if (table)
1262                 return table;
1263
1264         table = g_hash_table_new(str_case_hash, str_case_equal);
1265
1266         for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1267                 g_hash_table_insert(table, charsets[i].name,
1268                                     GUINT_TO_POINTER(charsets[i].charset));
1269         }
1270
1271         return table;
1272 }
1273
1274 const gchar *conv_get_charset_str(CharSet charset)
1275 {
1276         GHashTable *table;
1277
1278         table = conv_get_charset_to_str_table();
1279         return g_hash_table_lookup(table, GUINT_TO_POINTER(charset));
1280 }
1281
1282 CharSet conv_get_charset_from_str(const gchar *charset)
1283 {
1284         GHashTable *table;
1285
1286         if (!charset) return C_AUTO;
1287
1288         table = conv_get_charset_from_str_table();
1289         return GPOINTER_TO_UINT(g_hash_table_lookup(table, charset));
1290 }
1291
1292 static CharSet conv_get_locale_charset(void)
1293 {
1294         static CharSet cur_charset = -1;
1295         const gchar *cur_locale;
1296         const gchar *p;
1297         gint i;
1298
1299         if (cur_charset != -1)
1300                 return cur_charset;
1301
1302         cur_locale = conv_get_current_locale();
1303         if (!cur_locale) {
1304                 cur_charset = C_US_ASCII;
1305                 return cur_charset;
1306         }
1307
1308         if (strcasestr(cur_locale, ".UTF-8") ||
1309             strcasestr(cur_locale, ".utf8")) {
1310                 cur_charset = C_UTF_8;
1311                 return cur_charset;
1312         }
1313
1314         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1315                 cur_charset = C_ISO_8859_15;
1316                 return cur_charset;
1317         }
1318
1319         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1320                 const gchar *p;
1321
1322                 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1323                    "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1324                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1325                                  strlen(locale_table[i].locale))) {
1326                         cur_charset = locale_table[i].charset;
1327                         return cur_charset;
1328                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1329                          !strchr(p + 1, '.')) {
1330                         if (strlen(cur_locale) == 2 &&
1331                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1332                                 cur_charset = locale_table[i].charset;
1333                                 return cur_charset;
1334                         }
1335                 }
1336         }
1337
1338         cur_charset = C_AUTO;
1339         return cur_charset;
1340 }
1341
1342 static CharSet conv_get_locale_charset_no_utf8(void)
1343 {
1344         static CharSet cur_charset = -1;
1345         const gchar *cur_locale;
1346         const gchar *p;
1347         gchar *tmp;
1348         gint i;
1349
1350         if (prefs_common.broken_are_utf8)
1351                 return conv_get_locale_charset();
1352
1353         if (cur_charset != -1)
1354                 return cur_charset;
1355
1356         cur_locale = conv_get_current_locale();
1357         if (!cur_locale) {
1358                 cur_charset = C_US_ASCII;
1359                 return cur_charset;
1360         }
1361
1362         if (strcasestr(cur_locale, "UTF-8")) {
1363                 tmp = g_strdup(cur_locale);
1364                 *(strcasestr(tmp, ".UTF-8")) = '\0';
1365                 cur_locale = tmp;
1366         }
1367
1368         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1369                 cur_charset = C_ISO_8859_15;
1370                 return cur_charset;
1371         }
1372
1373         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1374                 const gchar *p;
1375
1376                 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1377                    "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1378                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1379                                  strlen(locale_table[i].locale))) {
1380                         cur_charset = locale_table[i].charset;
1381                         return cur_charset;
1382                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1383                          !strchr(p + 1, '.')) {
1384                         if (strlen(cur_locale) == 2 &&
1385                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1386                                 cur_charset = locale_table[i].charset;
1387                                 return cur_charset;
1388                         }
1389                 }
1390         }
1391
1392         cur_charset = C_AUTO;
1393         return cur_charset;
1394 }
1395
1396 const gchar *conv_get_locale_charset_str(void)
1397 {
1398         static const gchar *codeset = NULL;
1399
1400         if (!codeset)
1401                 codeset = conv_get_charset_str(conv_get_locale_charset());
1402
1403         return codeset ? codeset : CS_INTERNAL;
1404 }
1405
1406 const gchar *conv_get_locale_charset_str_no_utf8(void)
1407 {
1408         static const gchar *codeset = NULL;
1409
1410         if (!codeset)
1411                 codeset = conv_get_charset_str(conv_get_locale_charset_no_utf8());
1412
1413         return codeset ? codeset : CS_INTERNAL;
1414 }
1415
1416 static CharSet conv_get_outgoing_charset(void)
1417 {
1418         static CharSet out_charset = -1;
1419         const gchar *cur_locale;
1420         const gchar *p;
1421         gint i;
1422
1423         if (out_charset != -1)
1424                 return out_charset;
1425
1426         cur_locale = conv_get_current_locale();
1427         if (!cur_locale) {
1428                 out_charset = C_AUTO;
1429                 return out_charset;
1430         }
1431
1432         if (strcasestr(cur_locale, "UTF-8")) {
1433                 out_charset = C_UTF_8;
1434                 return out_charset;
1435         }
1436
1437         if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1438                 out_charset = C_ISO_8859_15;
1439                 return out_charset;
1440         }
1441
1442         for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1443                 const gchar *p;
1444
1445                 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1446                                  strlen(locale_table[i].locale))) {
1447                         out_charset = locale_table[i].out_charset;
1448                         break;
1449                 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1450                          !strchr(p + 1, '.')) {
1451                         if (strlen(cur_locale) == 2 &&
1452                             !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1453                                 out_charset = locale_table[i].out_charset;
1454                                 break;
1455                         }
1456                 }
1457         }
1458
1459         return out_charset;
1460 }
1461
1462 const gchar *conv_get_outgoing_charset_str(void)
1463 {
1464         CharSet out_charset;
1465         const gchar *str;
1466
1467         out_charset = conv_get_outgoing_charset();
1468         str = conv_get_charset_str(out_charset);
1469
1470         return str ? str : CS_UTF_8;
1471 }
1472
1473 const gchar *conv_get_current_locale(void)
1474 {
1475         const gchar *cur_locale;
1476
1477 #ifdef G_OS_WIN32
1478         cur_locale = g_win32_getlocale();
1479 #else
1480         cur_locale = g_getenv("LC_ALL");
1481         if (!cur_locale) cur_locale = g_getenv("LC_CTYPE");
1482         if (!cur_locale) cur_locale = g_getenv("LANG");
1483         if (!cur_locale) cur_locale = setlocale(LC_CTYPE, NULL);
1484 #endif /* G_OS_WIN32 */
1485
1486         debug_print("current locale: %s\n",
1487                     cur_locale ? cur_locale : "(none)");
1488
1489         return cur_locale;
1490 }
1491
1492 static gboolean conv_is_ja_locale(void)
1493 {
1494         static gint is_ja_locale = -1;
1495         const gchar *cur_locale;
1496
1497         if (is_ja_locale != -1)
1498                 return is_ja_locale != 0;
1499
1500         is_ja_locale = 0;
1501         cur_locale = conv_get_current_locale();
1502         if (cur_locale) {
1503                 if (g_ascii_strncasecmp(cur_locale, "ja", 2) == 0)
1504                         is_ja_locale = 1;
1505         }
1506
1507         return is_ja_locale != 0;
1508 }
1509
1510 gchar *conv_unmime_header(const gchar *str, const gchar *default_encoding,
1511                            gboolean addr_field)
1512 {
1513         gchar buf[BUFFSIZE];
1514
1515         if (is_ascii_str(str))
1516                 return unmime_header(str, addr_field);
1517
1518         if (default_encoding) {
1519                 gchar *utf8_buf;
1520
1521                 utf8_buf = conv_codeset_strdup
1522                         (str, default_encoding, CS_INTERNAL);
1523                 if (utf8_buf) {
1524                         gchar *decoded_str;
1525
1526                         decoded_str = unmime_header(utf8_buf, addr_field);
1527                         g_free(utf8_buf);
1528                         return decoded_str;
1529                 }
1530         }
1531
1532         if (conv_is_ja_locale())
1533                 conv_anytodisp(buf, sizeof(buf), str);
1534         else
1535                 conv_localetodisp(buf, sizeof(buf), str);
1536
1537         return unmime_header(buf, addr_field);
1538 }
1539
1540 #define MAX_LINELEN             76
1541 #define MAX_HARD_LINELEN        996
1542 #define MIMESEP_BEGIN           "=?"
1543 #define MIMESEP_END             "?="
1544
1545 #define LBREAK_IF_REQUIRED(cond, is_plain_text)                         \
1546 {                                                                       \
1547         if (len - (destp - (guchar *)dest) < MAX_LINELEN + 2) {         \
1548                 *destp = '\0';                                          \
1549                 return;                                                 \
1550         }                                                               \
1551                                                                         \
1552         if ((cond) && *srcp) {                                          \
1553                 if (destp > (guchar *)dest && left < MAX_LINELEN - 1) { \
1554                         if (isspace(*(destp - 1)))                      \
1555                                 destp--;                                \
1556                         else if (is_plain_text && isspace(*srcp))       \
1557                                 srcp++;                                 \
1558                         if (*srcp) {                                    \
1559                                 *destp++ = '\n';                        \
1560                                 *destp++ = ' ';                         \
1561                                 left = MAX_LINELEN - 1;                 \
1562                         }                                               \
1563                 } else if (destp == (guchar *)dest && left < 7) {       \
1564                         if (isspace(*(destp - 1)))                      \
1565                                 destp--;                                \
1566                         else if (is_plain_text && isspace(*srcp))       \
1567                                 srcp++;                                 \
1568                         if (*srcp) {                                    \
1569                                 *destp++ = '\n';                        \
1570                                 *destp++ = ' ';                         \
1571                                 left = MAX_LINELEN - 1;                 \
1572                         }                                               \
1573                 }                                                       \
1574         }                                                               \
1575 }
1576
1577 void conv_encode_header_full(gchar *dest, gint len, const gchar *src,
1578                         gint header_len, gboolean addr_field,
1579                         const gchar *out_encoding_)
1580 {
1581         const gchar *cur_encoding;
1582         const gchar *out_encoding;
1583         gint mimestr_len;
1584         gchar *mimesep_enc;
1585         gint left;
1586         const guchar *srcp = src;
1587         guchar *destp = dest;
1588         gboolean use_base64;
1589
1590         cm_return_if_fail(g_utf8_validate(src, -1, NULL) == TRUE);
1591         cm_return_if_fail(destp != NULL);
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 and quotes in encoded strings */
1642                 if (addr_field && (*srcp == '(' || *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 == ')' || *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                                         left = 0;
1698                                         LBREAK_IF_REQUIRED(1, FALSE);
1699                                         continue;
1700                                 } else {
1701                                         cont = TRUE;
1702                                         break;
1703                                 }
1704                         }
1705
1706                         if (cur_len > 0) {
1707                                 Xstrndup_a(part_str, srcp, cur_len, );
1708                                 out_str = conv_codeset_strdup
1709                                         (part_str, cur_encoding, out_encoding);
1710                                 if (!out_str) {
1711                                         g_warning("conv_encode_header(): code conversion failed\n");
1712                                         conv_unreadable_8bit(part_str);
1713                                         out_str = g_strdup(part_str);
1714                                 }
1715                                 out_str_len = strlen(out_str);
1716
1717                                 if (use_base64)
1718                                         out_enc_str_len = B64LEN(out_str_len);
1719                                 else
1720                                         out_enc_str_len =
1721                                                 qp_get_q_encoding_len(out_str);
1722
1723                                 Xalloca(enc_str, out_enc_str_len + 1, );
1724                                 if (use_base64)
1725                                         base64_encode(enc_str, out_str, out_str_len);
1726                                 else
1727                                         qp_q_encode(enc_str, out_str);
1728
1729                                 g_free(out_str);
1730
1731                                 /* output MIME-encoded string block */
1732                                 mime_block_len = mimestr_len + strlen(enc_str);
1733                                 g_snprintf(destp, mime_block_len + 1,
1734                                            MIMESEP_BEGIN "%s%s%s" MIMESEP_END,
1735                                            out_encoding, mimesep_enc, enc_str);
1736                                 destp += mime_block_len;
1737                                 srcp += cur_len;
1738
1739                                 left -= mime_block_len;
1740                         }
1741
1742                         LBREAK_IF_REQUIRED(cont, FALSE);
1743
1744                         if (cur_len == 0)
1745                                 break;
1746                 }
1747         }
1748
1749         *destp = '\0';
1750 }
1751
1752 void conv_encode_header(gchar *dest, gint len, const gchar *src,
1753                         gint header_len, gboolean addr_field)
1754 {
1755         conv_encode_header_full(dest,len,src,header_len,addr_field,NULL);
1756 }
1757
1758 #undef LBREAK_IF_REQUIRED
1759 gchar *conv_filename_from_utf8(const gchar *utf8_file)
1760 {
1761         gchar *fs_file;
1762         GError *error = NULL;
1763
1764         fs_file = g_filename_from_utf8(utf8_file, -1, NULL, NULL, &error);
1765         if (error) {
1766                 debug_print("failed to convert encoding of file name: %s\n",
1767                           error->message);
1768                 g_error_free(error);
1769         }
1770         if (!fs_file)
1771                 fs_file = g_strdup(utf8_file);
1772
1773         return fs_file;
1774 }
1775
1776 gchar *conv_filename_to_utf8(const gchar *fs_file)
1777 {
1778         gchar *utf8_file = NULL;
1779         GError *error = NULL;
1780
1781         utf8_file = g_filename_to_utf8(fs_file, -1, NULL, NULL, &error);
1782         if (error) {
1783                 g_warning("failed to convert encoding of file name: %s\n",
1784                           error->message);
1785                 g_error_free(error);
1786         }
1787
1788         if (!utf8_file || !g_utf8_validate(utf8_file, -1, NULL)) {
1789                 g_free(utf8_file);
1790                 utf8_file = g_strdup(fs_file);
1791                 conv_unreadable_8bit(utf8_file);
1792         }
1793
1794         return utf8_file;
1795 }