src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <glib/gi18n.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <time.h>
  30 #include <sys/stat.h>
  31
  32 #include "procheader.h"
  33 #include "procmsg.h"
  34 #include "codeconv.h"
  35 #include "prefs_common.h"
  36 #include "utils.h"
  37
  38 #define BUFFSIZE        8192
  39
  40 typedef char *(*getlinefunc) (char *, size_t, void *);
  41 typedef int (*peekcharfunc) (void *);
  42 typedef int (*getcharfunc) (void *);
  43 typedef gint (*get_one_field_func) (gchar *, size_t, void *, HeaderEntry[]);
  44
  45 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  46                                  HeaderEntry hentry[]);
  47
  48 static char *string_getline(char *buf, size_t len, char **str);
  49 static int string_peekchar(char **str);
  50 static int file_peekchar(FILE *fp);
  51 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
  52                                   HeaderEntry hentry[],
  53                                   getlinefunc getline,
  54                                   peekcharfunc peekchar,
  55                                   gboolean unfold);
  56 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
  57                              gboolean full, gboolean decrypted);
  58
  59
  60 gint procheader_get_one_field(gchar *buf, size_t len, FILE *fp,
  61                               HeaderEntry hentry[])
  62 {
  63         return generic_get_one_field(buf, len, fp, hentry,
  64                                      (getlinefunc)fgets, (peekcharfunc)file_peekchar,
  65                                      TRUE);
  66 }
  67
  68 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  69                                  HeaderEntry hentry[])
  70 {
  71         return generic_get_one_field(buf, len, str, hentry,
  72                                      (getlinefunc)string_getline,
  73                                      (peekcharfunc)string_peekchar,
  74                                      TRUE);
  75 }
  76
  77 static char *string_getline(char *buf, size_t len, char **str)
  78 {
  79         if (!**str)
  80                 return NULL;
  81
  82         for (; **str && len > 1; --len)
  83                 if ((*buf++ = *(*str)++) == '\n')
  84                     break;
  85         *buf = '\0';
  86
  87         return buf;
  88 }
  89
  90 static int string_peekchar(char **str)
  91 {
  92         return **str;
  93 }
  94
  95 static int file_peekchar(FILE *fp)
  96 {
  97         return ungetc(getc(fp), fp);
  98 }
  99
 100 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
 101                           HeaderEntry *hentry,
 102                           getlinefunc getline, peekcharfunc peekchar,
 103                           gboolean unfold)
 104 {
 105         gint nexthead;
 106         gint hnum = 0;
 107         HeaderEntry *hp = NULL;
 108
 109         if (hentry != NULL) {
 110                 /* skip non-required headers */
 111                 do {
 112                         do {
 113                                 if (getline(buf, len, data) == NULL)
 114                                         return -1;
 115                                 if (buf[0] == '\r' || buf[0] == '\n')
 116                                         return -1;
 117                         } while (buf[0] == ' ' || buf[0] == '\t');
 118
 119                         for (hp = hentry, hnum = 0; hp->name != NULL;
 120                              hp++, hnum++) {
 121                                 if (!g_ascii_strncasecmp(hp->name, buf,
 122                                                  strlen(hp->name)))
 123                                         break;
 124                         }
 125                 } while (hp->name == NULL);
 126         } else {
 127                 if (getline(buf, len, data) == NULL) return -1;
 128                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
 129         }
 130
 131         /* unfold line */
 132         while (1) {
 133                 nexthead = peekchar(data);
 134                 /* ([*WSP CRLF] 1*WSP) */
 135                 if (nexthead == ' ' || nexthead == '\t') {
 136                         size_t buflen;
 137                         /* trim previous trailing \n if requesting one header or
 138                          * unfolding was requested */
 139                         if ((!hentry && unfold) || (hp && hp->unfold))
 140                                 strretchomp(buf);
 141
 142                         buflen = strlen(buf);
 143
 144                         /* concatenate next line */
 145                         if ((len - buflen) > 2) {
 146                                 if (getline(buf + buflen, len - buflen, data) == NULL)
 147                                         break;
 148                         } else
 149                                 break;
 150                 } else {
 151                         /* remove trailing new line */
 152                         strretchomp(buf);
 153                         break;
 154                 }
 155         }
 156
 157         return hnum;
 158 }
 159
 160 gint procheader_get_one_field_asis(gchar *buf, size_t len, FILE *fp)
 161 {
 162         return generic_get_one_field(buf, len, fp, NULL,
 163                                      (getlinefunc)fgets,
 164                                      (peekcharfunc)file_peekchar,
 165                                      FALSE);
 166 }
 167
 168 #if 0
 169 gchar *procheader_get_unfolded_line(gchar *buf, gint len, FILE *fp)
 170 {
 171         gboolean folded = FALSE;
 172         gint nexthead;
 173         gchar *bufp;
 174
 175         if (fgets(buf, len, fp) == NULL) return NULL;
 176         if (buf[0] == '\r' || buf[0] == '\n') return NULL;
 177         bufp = buf + strlen(buf);
 178
 179         for (; bufp > buf &&
 180              (*(bufp - 1) == '\n' || *(bufp - 1) == '\r');
 181              bufp--)
 182                 *(bufp - 1) = '\0';
 183
 184         while (1) {
 185                 nexthead = fgetc(fp);
 186
 187                 /* folded */
 188                 if (nexthead == ' ' || nexthead == '\t')
 189                         folded = TRUE;
 190                 else if (nexthead == EOF)
 191                         break;
 192                 else if (folded == TRUE) {
 193                         if (nexthead == '\r' || nexthead == '\n') {
 194                                 folded = FALSE;
 195                                 continue;
 196                         }
 197
 198                         if ((len - (bufp - buf)) <= 2) break;
 199
 200                         /* replace return code on the tail end
 201                            with space */
 202                         *bufp++ = ' ';
 203                         *bufp++ = nexthead;
 204                         *bufp = '\0';
 205
 206                         /* concatenate next line */
 207                         if (fgets(bufp, len - (bufp - buf), fp)
 208                             == NULL) break;
 209                         bufp += strlen(bufp);
 210
 211                         for (; bufp > buf &&
 212                              (*(bufp - 1) == '\n' || *(bufp - 1) == '\r');
 213                              bufp--)
 214                                 *(bufp - 1) = '\0';
 215
 216                         folded = FALSE;
 217                 } else {
 218                         ungetc(nexthead, fp);
 219                         break;
 220                 }
 221         }
 222
 223         /* remove trailing return code */
 224         strretchomp(buf);
 225
 226         return buf;
 227 }
 228 #endif
 229
 230 #if 0
 231 GSList *procheader_get_header_list_from_file(const gchar *file)
 232 {
 233         FILE *fp;
 234         GSList *hlist;
 235
 236         if ((fp = fopen(file, "rb")) == NULL) {
 237                 FILE_OP_ERROR(file, "fopen");
 238                 return NULL;
 239         }
 240
 241         hlist = procheader_get_header_list(fp);
 242
 243         fclose(fp);
 244         return hlist;
 245 }
 246
 247 GSList *procheader_get_header_list(FILE *fp)
 248 {
 249         gchar buf[BUFFSIZE];
 250         GSList *hlist = NULL;
 251         Header *header;
 252
 253         g_return_val_if_fail(fp != NULL, NULL);
 254
 255         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 256                 if ((header = procheader_parse_header(buf)) != NULL)
 257                         hlist = g_slist_append(hlist, header);
 258                 /*
 259                 if (*buf == ':') continue;
 260                 for (p = buf; *p && *p != ' '; p++) {
 261                         if (*p == ':') {
 262                                 header = g_new(Header, 1);
 263                                 header->name = g_strndup(buf, p - buf);
 264                                 p++;
 265                                 while (*p == ' ' || *p == '\t') p++;
 266                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 267                                 header->body = g_strdup(tmp);
 268
 269                                 hlist = g_slist_append(hlist, header);
 270                                 break;
 271                         }
 272                 }
 273                 */
 274         }
 275
 276         return hlist;
 277 }
 278 #endif
 279
 280 #if 0
 281 GPtrArray *procheader_get_header_array(FILE *fp)
 282 {
 283         gchar buf[BUFFSIZE];
 284         GPtrArray *headers;
 285         Header *header;
 286
 287         g_return_val_if_fail(fp != NULL, NULL);
 288
 289         headers = g_ptr_array_new();
 290
 291         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 292                 if ((header = procheader_parse_header(buf)) != NULL)
 293                         g_ptr_array_add(headers, header);
 294                 /*
 295                 if (*buf == ':') continue;
 296                 for (p = buf; *p && *p != ' '; p++) {
 297                         if (*p == ':') {
 298                                 header = g_new(Header, 1);
 299                                 header->name = g_strndup(buf, p - buf);
 300                                 p++;
 301                                 while (*p == ' ' || *p == '\t') p++;
 302                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 303                                 header->body = g_strdup(tmp);
 304
 305                                 g_ptr_array_add(headers, header);
 306                                 break;
 307                         }
 308                 }
 309                 */
 310         }
 311
 312         return headers;
 313 }
 314 #endif
 315
 316 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 317 {
 318         gchar buf[BUFFSIZE];
 319         GPtrArray *headers;
 320         Header *header;
 321
 322         g_return_val_if_fail(fp != NULL, NULL);
 323
 324         headers = g_ptr_array_new();
 325
 326         while (procheader_get_one_field_asis(buf, sizeof(buf), fp) != -1) {
 327                 if ((header = procheader_parse_header(buf)) != NULL)
 328                         g_ptr_array_add(headers, header);
 329                         /*
 330                 if (*buf == ':') continue;
 331                 for (p = buf; *p && *p != ' '; p++) {
 332                         if (*p == ':') {
 333                                 header = g_new(Header, 1);
 334                                 header->name = g_strndup(buf, p - buf);
 335                                 p++;
 336                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 337                                 header->body = g_strdup(tmp);
 338
 339                                 g_ptr_array_add(headers, header);
 340                                 break;
 341                         }
 342                 }
 343                         */
 344         }
 345
 346         return headers;
 347 }
 348
 349 #if 0
 350 void procheader_header_list_destroy(GSList *hlist)
 351 {
 352         Header *header;
 353
 354         while (hlist != NULL) {
 355                 header = hlist->data;
 356                 procheader_header_free(header);
 357                 hlist = g_slist_remove(hlist, header);
 358         }
 359 }
 360 #endif
 361
 362 void procheader_header_array_destroy(GPtrArray *harray)
 363 {
 364         gint i;
 365         Header *header;
 366
 367         for (i = 0; i < harray->len; i++) {
 368                 header = g_ptr_array_index(harray, i);
 369                 procheader_header_free(header);
 370         }
 371
 372         g_ptr_array_free(harray, TRUE);
 373 }
 374
 375 void procheader_header_free(Header *header)
 376 {
 377         if (!header) return;
 378
 379         g_free(header->name);
 380         g_free(header->body);
 381         g_free(header);
 382 }
 383
 384 /*
 385   tests whether two headers' names are equal
 386   remove the trailing ':' or ' ' before comparing
 387 */
 388
 389 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 390 {
 391         int len1;
 392         int len2;
 393
 394         len1 = strlen(hdr1);
 395         len2 = strlen(hdr2);
 396         if (hdr1[len1 - 1] == ':')
 397                 len1--;
 398         if (hdr2[len2 - 1] == ':')
 399                 len2--;
 400         if (len1 != len2)
 401                 return 0;
 402
 403         return (g_ascii_strncasecmp(hdr1, hdr2, len1) == 0);
 404 }
 405
 406 /*
 407   parse headers, for example :
 408   From: dinh@enseirb.fr becomes :
 409   header->name = "From:"
 410   header->body = "dinh@enseirb.fr"
 411  */
 412
 413 Header * procheader_parse_header(gchar * buf)
 414 {
 415         gchar *p = buf;
 416         Header * header;
 417
 418         if ((*buf == ':') || (*buf == ' '))
 419                 return NULL;
 420
 421         for (p = buf; *p ; p++) {
 422                 if ((*p == ':') || (*p == ' ')) {
 423                         header = g_new(Header, 1);
 424                         header->name = g_strndup(buf, p - buf + 1);
 425                         p++;
 426                         while (*p == ' ' || *p == '\t') p++;
 427                         header->body = conv_unmime_header(p, NULL);
 428                         return header;
 429                 }
 430         }
 431         return NULL;
 432 }
 433
 434 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 435 {
 436         gchar buf[BUFFSIZE];
 437         HeaderEntry *hp;
 438         gint hnum;
 439         gchar *p;
 440
 441         if (hentry == NULL) return;
 442
 443         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 444                != -1) {
 445                 hp = hentry + hnum;
 446
 447                 p = buf + strlen(hp->name);
 448                 while (*p == ' ' || *p == '\t') p++;
 449
 450                 if (hp->body == NULL)
 451                         hp->body = g_strdup(p);
 452                 else if (procheader_headername_equal(hp->name, "To") ||
 453                          procheader_headername_equal(hp->name, "Cc")) {
 454                         gchar *tp = hp->body;
 455                         hp->body = g_strconcat(tp, ", ", p, NULL);
 456                         g_free(tp);
 457                 }
 458         }
 459 }
 460
 461 MsgInfo *procheader_parse_file(const gchar *file, MsgFlags flags,
 462                                gboolean full, gboolean decrypted)
 463 {
 464         struct stat s;
 465         FILE *fp;
 466         MsgInfo *msginfo;
 467
 468         if (stat(file, &s) < 0) {
 469                 FILE_OP_ERROR(file, "stat");
 470                 return NULL;
 471         }
 472         if (!S_ISREG(s.st_mode))
 473                 return NULL;
 474
 475         if ((fp = fopen(file, "rb")) == NULL) {
 476                 FILE_OP_ERROR(file, "fopen");
 477                 return NULL;
 478         }
 479
 480         msginfo = procheader_parse_stream(fp, flags, full, decrypted);
 481         fclose(fp);
 482
 483         if (msginfo) {
 484                 msginfo->size = s.st_size;
 485                 msginfo->mtime = s.st_mtime;
 486         }
 487
 488         return msginfo;
 489 }
 490
 491 MsgInfo *procheader_parse_str(const gchar *str, MsgFlags flags, gboolean full,
 492                               gboolean decrypted)
 493 {
 494         return parse_stream(&str, TRUE, flags, full, decrypted);
 495 }
 496
 497 enum
 498 {
 499         H_DATE          = 0,
 500         H_FROM          = 1,
 501         H_TO            = 2,
 502         H_CC            = 3,
 503         H_NEWSGROUPS    = 4,
 504         H_SUBJECT       = 5,
 505         H_MSG_ID        = 6,
 506         H_REFERENCES    = 7,
 507         H_IN_REPLY_TO   = 8,
 508         H_CONTENT_TYPE  = 9,
 509         H_SEEN          = 10,
 510         H_STATUS        = 11,
 511         H_X_STATUS      = 12,
 512         H_FROM_SPACE    = 13,
 513         H_SC_PLANNED_DOWNLOAD = 14,
 514         H_SC_MESSAGE_SIZE = 15,
 515         H_X_FACE        = 16,
 516         H_DISPOSITION_NOTIFICATION_TO = 17,
 517         H_RETURN_RECEIPT_TO = 18,
 518         H_SC_PARTIALLY_RETRIEVED = 19,
 519         H_SC_ACCOUNT_SERVER = 20,
 520         H_SC_ACCOUNT_LOGIN = 21,
 521 };
 522
 523 static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 524                                    {"From:",            NULL, TRUE},
 525                                    {"To:",              NULL, TRUE},
 526                                    {"Cc:",              NULL, TRUE},
 527                                    {"Newsgroups:",      NULL, TRUE},
 528                                    {"Subject:",         NULL, TRUE},
 529                                    {"Message-ID:",      NULL, FALSE},
 530                                    {"References:",      NULL, FALSE},
 531                                    {"In-Reply-To:",     NULL, FALSE},
 532                                    {"Content-Type:",    NULL, FALSE},
 533                                    {"Seen:",            NULL, FALSE},
 534                                    {"Status:",          NULL, FALSE},
 535                                    {"X-Status:",        NULL, FALSE},
 536                                    {"From ",            NULL, FALSE},
 537                                    {"SC-Marked-For-Download:", NULL, FALSE},
 538                                    {"SC-Message-Size:", NULL, FALSE},
 539                                    {"X-Face:",          NULL, FALSE},
 540                                    {"Disposition-Notification-To:", NULL, FALSE},
 541                                    {"Return-Receipt-To:", NULL, FALSE},
 542                                    {"SC-Partially-Retrieved:", NULL, FALSE},
 543                                    {"SC-Account-Server:", NULL, FALSE},
 544                                    {"SC-Account-Login:",NULL, FALSE},
 545                                    {NULL,               NULL, FALSE}};
 546
 547 static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 548                                     {"From:",           NULL, TRUE},
 549                                     {"To:",             NULL, TRUE},
 550                                     {"Cc:",             NULL, TRUE},
 551                                     {"Newsgroups:",     NULL, TRUE},
 552                                     {"Subject:",        NULL, TRUE},
 553                                     {"Message-ID:",     NULL, FALSE},
 554                                     {"References:",     NULL, FALSE},
 555                                     {"In-Reply-To:",    NULL, FALSE},
 556                                     {"Content-Type:",   NULL, FALSE},
 557                                     {"Seen:",           NULL, FALSE},
 558                                     {"Status:",         NULL, FALSE},
 559                                     {"X-Status:",       NULL, FALSE},
 560                                     {"From ",           NULL, FALSE},
 561                                     {"SC-Marked-For-Download:", NULL, FALSE},
 562                                     {"SC-Message-Size:",NULL, FALSE},
 563                                     {NULL,              NULL, FALSE}};
 564
 565 HeaderEntry* procheader_get_headernames(gboolean full)
 566 {
 567         return full ? hentry_full : hentry_short;
 568 }
 569
 570 MsgInfo *procheader_parse_stream(FILE *fp, MsgFlags flags, gboolean full,
 571                                  gboolean decrypted)
 572 {
 573         return parse_stream(fp, FALSE, flags, full, decrypted);
 574 }
 575
 576 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
 577                              gboolean full, gboolean decrypted)
 578 {
 579         MsgInfo *msginfo;
 580         gchar buf[BUFFSIZE];
 581         gchar *reference = NULL;
 582         gchar *p, *tmp;
 583         gchar *hp;
 584         HeaderEntry *hentry;
 585         gint hnum;
 586         get_one_field_func get_one_field =
 587                 isstring ? (get_one_field_func)string_get_one_field
 588                          : (get_one_field_func)procheader_get_one_field;
 589
 590         hentry = procheader_get_headernames(full);
 591
 592         if (MSG_IS_QUEUED(flags) || MSG_IS_DRAFT(flags)) {
 593                 while (get_one_field(buf, sizeof(buf), data, NULL) != -1)
 594                         ; /* loop */
 595         }
 596
 597         msginfo = procmsg_msginfo_new();
 598
 599         if (flags.tmp_flags || flags.perm_flags)
 600                 msginfo->flags = flags;
 601         else
 602                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_NEW | MSG_UNREAD);
 603
 604         msginfo->inreplyto = NULL;
 605
 606         while ((hnum = get_one_field(buf, sizeof(buf), data, hentry))
 607                != -1) {
 608                 hp = buf + strlen(hentry[hnum].name);
 609                 while (*hp == ' ' || *hp == '\t') hp++;
 610
 611                 switch (hnum) {
 612                 case H_DATE:
 613                         if (msginfo->date) break;
 614                         msginfo->date_t =
 615                                 procheader_date_parse(NULL, hp, 0);
 616                         msginfo->date = g_strdup(hp);
 617                         break;
 618                 case H_FROM:
 619                         if (msginfo->from) break;
 620                         msginfo->from = conv_unmime_header(hp, NULL);
 621                         msginfo->fromname = procheader_get_fromname(msginfo->from);
 622                         break;
 623                 case H_TO:
 624                         tmp = conv_unmime_header(hp, NULL);
 625                         if (msginfo->to) {
 626                                 p = msginfo->to;
 627                                 msginfo->to =
 628                                         g_strconcat(p, ", ", tmp, NULL);
 629                                 g_free(p);
 630                         } else
 631                                 msginfo->to = g_strdup(tmp);
 632                         g_free(tmp);
 633                         break;
 634                 case H_CC:
 635                         tmp = conv_unmime_header(hp, NULL);
 636                         if (msginfo->cc) {
 637                                 p = msginfo->cc;
 638                                 msginfo->cc =
 639                                         g_strconcat(p, ", ", tmp, NULL);
 640                                 g_free(p);
 641                         } else
 642                                 msginfo->cc = g_strdup(tmp);
 643                         g_free(tmp);
 644                         break;
 645                 case H_NEWSGROUPS:
 646                         if (msginfo->newsgroups) {
 647                                 p = msginfo->newsgroups;
 648                                 msginfo->newsgroups =
 649                                         g_strconcat(p, ",", hp, NULL);
 650                                 g_free(p);
 651                         } else
 652                                 msginfo->newsgroups = g_strdup(hp);
 653                         break;
 654                 case H_SUBJECT:
 655                         if (msginfo->subject) break;
 656                         msginfo->subject = conv_unmime_header(hp, NULL);
 657                         break;
 658                 case H_MSG_ID:
 659                         if (msginfo->msgid) break;
 660
 661                         extract_parenthesis(hp, '<', '>');
 662                         remove_space(hp);
 663                         msginfo->msgid = g_strdup(hp);
 664                         break;
 665                 case H_REFERENCES:
 666                 case H_IN_REPLY_TO:
 667                         if (!reference) {
 668                                 msginfo->references = g_strdup(hp);
 669                                 eliminate_parenthesis(hp, '(', ')');
 670                                 if ((p = strrchr(hp, '<')) != NULL &&
 671                                     strchr(p + 1, '>') != NULL) {
 672                                         extract_parenthesis(p, '<', '>');
 673                                         remove_space(p);
 674                                         if (*p != '\0')
 675                                                 reference = g_strdup(p);
 676                                 }
 677                         }
 678                         break;
 679                 case H_CONTENT_TYPE:
 680                         if (!g_ascii_strncasecmp(hp, "multipart/", 10))
 681                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_MULTIPART);
 682                         break;
 683 #ifdef ALLOW_HEADER_HINT
 684                 case H_SEEN:
 685                         /* mnews Seen header */
 686                         MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 687                         break;
 688 #endif
 689                 case H_X_FACE:
 690                         if (msginfo->xface) break;
 691                         msginfo->xface = g_strdup(hp);
 692                         break;
 693                 case H_DISPOSITION_NOTIFICATION_TO:
 694                         if (msginfo->dispositionnotificationto) break;
 695                         msginfo->dispositionnotificationto = g_strdup(hp);
 696                         break;
 697                 case H_RETURN_RECEIPT_TO:
 698                         if (msginfo->returnreceiptto) break;
 699                         msginfo->returnreceiptto = g_strdup(hp);
 700                         break;
 701                 case H_SC_PARTIALLY_RETRIEVED:
 702                         if (msginfo->partial_recv) break;
 703                         msginfo->partial_recv = g_strdup(hp);
 704                         break;
 705                 case H_SC_ACCOUNT_SERVER:
 706                         if (msginfo->account_server) break;
 707                         msginfo->account_server = g_strdup(hp);
 708                         break;
 709                 case H_SC_ACCOUNT_LOGIN:
 710                         if (msginfo->account_login) break;
 711                         msginfo->account_login = g_strdup(hp);
 712                         break;
 713                 case H_SC_MESSAGE_SIZE:
 714                         if (msginfo->total_size) break;
 715                         msginfo->total_size = atoi(hp);
 716                         break;
 717                 case H_SC_PLANNED_DOWNLOAD:
 718                         msginfo->planned_download = atoi(hp);
 719                         break;
 720 #ifdef ALLOW_HEADER_HINT
 721                 case H_STATUS:
 722                         if (strchr(hp, 'R') != NULL)
 723                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 724                         if (strchr(hp, 'O') != NULL)
 725                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW);
 726                         if (strchr(hp, 'U') != NULL)
 727                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 728                         break;
 729                 case H_X_STATUS:
 730                         if (strchr(hp, 'D') != NULL)
 731                                 MSG_SET_PERM_FLAGS(msginfo->flags,
 732                                               MSG_REALLY_DELETED);
 733                         if (strchr(hp, 'F') != NULL)
 734                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_MARKED);
 735                         if (strchr(hp, 'd') != NULL)
 736                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_DELETED);
 737                         if (strchr(hp, 'r') != NULL)
 738                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_REPLIED);
 739                         if (strchr(hp, 'f') != NULL)
 740                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_FORWARDED);
 741                         break;
 742 #endif
 743                 case H_FROM_SPACE:
 744                         if (msginfo->fromspace) break;
 745                         msginfo->fromspace = g_strdup(hp);
 746                         break;
 747                 default:
 748                         break;
 749                 }
 750         }
 751         msginfo->inreplyto = reference;
 752
 753         return msginfo;
 754 }
 755
 756 gchar *procheader_get_fromname(const gchar *str)
 757 {
 758         gchar *tmp, *name;
 759
 760         Xstrdup_a(tmp, str, return NULL);
 761
 762         if (*tmp == '\"') {
 763                 extract_quote(tmp, '\"');
 764                 g_strstrip(tmp);
 765         } else if (strchr(tmp, '<')) {
 766                 eliminate_parenthesis(tmp, '<', '>');
 767                 g_strstrip(tmp);
 768                 if (*tmp == '\0') {
 769                         strcpy(tmp, str);
 770                         extract_parenthesis(tmp, '<', '>');
 771                         g_strstrip(tmp);
 772                 }
 773         } else if (strchr(tmp, '(')) {
 774                 extract_parenthesis(tmp, '(', ')');
 775                 g_strstrip(tmp);
 776         }
 777
 778         if (*tmp == '\0')
 779                 name = g_strdup(str);
 780         else
 781                 name = g_strdup(tmp);
 782
 783         return name;
 784 }
 785
 786 static gint procheader_scan_date_string(const gchar *str,
 787                                         gchar *weekday, gint *day,
 788                                         gchar *month, gint *year,
 789                                         gint *hh, gint *mm, gint *ss,
 790                                         gchar *zone)
 791 {
 792         gint result;
 793
 794         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d %5s",
 795                         weekday, day, month, year, hh, mm, ss, zone);
 796         if (result == 8) return 0;
 797
 798         result = sscanf(str, "%3s,%d %9s %d %2d:%2d:%2d %5s",
 799                         weekday, day, month, year, hh, mm, ss, zone);
 800         if (result == 8) return 0;
 801
 802         result = sscanf(str, "%d %9s %d %2d:%2d:%2d %5s",
 803                         day, month, year, hh, mm, ss, zone);
 804         if (result == 7) return 0;
 805
 806         *zone = '\0';
 807         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d",
 808                         weekday, day, month, year, hh, mm, ss);
 809         if (result == 7) return 0;
 810
 811         *ss = 0;
 812         result = sscanf(str, "%10s %d %9s %d %2d:%2d %5s",
 813                         weekday, day, month, year, hh, mm, zone);
 814         if (result == 7) return 0;
 815
 816         result = sscanf(str, "%d %9s %d %2d:%2d %5s",
 817                         day, month, year, hh, mm, zone);
 818         if (result == 6) return 0;
 819
 820         return -1;
 821 }
 822
 823 /*
 824  * Hiro, most UNIXen support this function:
 825  * http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getdate
 826  */
 827 gboolean procheader_date_parse_to_tm(const gchar *src, struct tm *t, char *zone)
 828 {
 829         static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
 830         gchar weekday[11];
 831         gint day;
 832         gchar month[10];
 833         gint year;
 834         gint hh, mm, ss;
 835         GDateMonth dmonth;
 836         gchar *p;
 837
 838         if (!t)
 839                 return FALSE;
 840
 841         memset(t, 0, sizeof *t);
 842
 843         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 844                                         &hh, &mm, &ss, zone) < 0) {
 845                 g_warning("Invalid date: %s\n", src);
 846                 return FALSE;
 847         }
 848
 849         /* Y2K compliant :) */
 850         if (year < 100) {
 851                 if (year < 70)
 852                         year += 2000;
 853                 else
 854                         year += 1900;
 855         }
 856
 857         month[3] = '\0';
 858         if ((p = strstr(monthstr, month)) != NULL)
 859                 dmonth = (gint)(p - monthstr) / 3 + 1;
 860         else {
 861                 g_warning("Invalid month: %s\n", month);
 862                 dmonth = G_DATE_BAD_MONTH;
 863         }
 864
 865         t->tm_sec = ss;
 866         t->tm_min = mm;
 867         t->tm_hour = hh;
 868         t->tm_mday = day;
 869         t->tm_mon = dmonth - 1;
 870         t->tm_year = year - 1900;
 871         t->tm_wday = 0;
 872         t->tm_yday = 0;
 873         t->tm_isdst = -1;
 874
 875         mktime(t);
 876
 877         return TRUE;
 878 }
 879
 880 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 881 {
 882         static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
 883         gchar weekday[11];
 884         gint day;
 885         gchar month[10];
 886         gint year;
 887         gint hh, mm, ss;
 888         gchar zone[6];
 889         GDateMonth dmonth = G_DATE_BAD_MONTH;
 890         struct tm t;
 891         gchar *p;
 892         time_t timer;
 893         time_t tz_offset;
 894
 895         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 896                                         &hh, &mm, &ss, zone) < 0) {
 897                 g_warning("Invalid date: %s\n", src);
 898                 if (dest && len > 0)
 899                         strncpy2(dest, src, len);
 900                 return 0;
 901         }
 902
 903         /* Y2K compliant :) */
 904         if (year < 1000) {
 905                 if (year < 50)
 906                         year += 2000;
 907                 else
 908                         year += 1900;
 909         }
 910
 911         month[3] = '\0';
 912         for (p = monthstr; *p != '\0'; p += 3) {
 913                 if (!g_ascii_strncasecmp(p, month, 3)) {
 914                         dmonth = (gint)(p - monthstr) / 3 + 1;
 915                         break;
 916                 }
 917         }
 918         if (*p == '\0')
 919                 g_warning("Invalid month: %s\n", month);
 920
 921         t.tm_sec = ss;
 922         t.tm_min = mm;
 923         t.tm_hour = hh;
 924         t.tm_mday = day;
 925         t.tm_mon = dmonth - 1;
 926         t.tm_year = year - 1900;
 927         t.tm_wday = 0;
 928         t.tm_yday = 0;
 929         t.tm_isdst = -1;
 930
 931         timer = mktime(&t);
 932         tz_offset = remote_tzoffset_sec(zone);
 933         if (tz_offset != -1)
 934                 timer += tzoffset_sec(&timer) - tz_offset;
 935
 936         if (dest)
 937                 procheader_date_get_localtime(dest, len, timer);
 938
 939         return timer;
 940 }
 941
 942 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 943 {
 944         struct tm *lt;
 945         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 946         gchar *str;
 947         const gchar *src_codeset, *dest_codeset;
 948
 949         lt = localtime(&timer);
 950
 951         if (prefs_common.date_format)
 952                 strftime(dest, len, prefs_common.date_format, lt);
 953         else
 954                 strftime(dest, len, default_format, lt);
 955
 956         src_codeset = conv_get_locale_charset_str();
 957         dest_codeset = CS_UTF_8;
 958         str = conv_codeset_strdup(dest, src_codeset, dest_codeset);
 959         if (str) {
 960                 g_snprintf(dest, len, "%s", str);
 961                 strncpy2(dest, str, len);
 962                 g_free(str);
 963         }
 964 }
 965
 966 /* Added by Mel Hadasht on 27 Aug 2001 */
 967 /* Get a header from msginfo */
 968 gint procheader_get_header_from_msginfo(MsgInfo *msginfo, gchar *buf, gint len, gchar *header)
 969 {
 970         gchar *file;
 971         FILE *fp;
 972         HeaderEntry hentry[]={ { NULL, NULL, TRUE  },
 973                                { NULL, NULL, FALSE } };
 974         gint val;
 975
 976         hentry[0].name = header;
 977
 978         g_return_val_if_fail(msginfo != NULL, -1);
 979         file = procmsg_get_message_file_path(msginfo);
 980         if ((fp = fopen(file, "rb")) == NULL) {
 981                FILE_OP_ERROR(file, "fopen");
 982                g_free(file);
 983                return -1;
 984         }
 985         val = procheader_get_one_field(buf,len, fp, hentry);
 986         if (fclose(fp) == EOF) {
 987                 FILE_OP_ERROR(file, "fclose");
 988                 unlink(file);
 989                 g_free(file);
 990                 return -1;
 991         }
 992
 993         g_free(file);
 994         if (val == -1)
 995                 return -1;
 996
 997         return 0;
 998 }