src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 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 <stdio.h>
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #include <time.h>
  29
  30 #include "intl.h"
  31 #include "procheader.h"
  32 #include "procmsg.h"
  33 #include "codeconv.h"
  34 #include "prefs_common.h"
  35 #include "utils.h"
  36
  37 #define BUFFSIZE        8192
  38
  39 gint procheader_get_one_field(gchar *buf, gint len, FILE *fp,
  40                               HeaderEntry hentry[])
  41 {
  42         gint nexthead;
  43         gint hnum = 0;
  44         HeaderEntry *hp = NULL;
  45
  46         if (hentry != NULL) {
  47                 /* skip non-required headers */
  48                 do {
  49                         do {
  50                                 if (fgets(buf, len, fp) == NULL)
  51                                         return -1;
  52                                 if (buf[0] == '\r' || buf[0] == '\n')
  53                                         return -1;
  54                         } while (buf[0] == ' ' || buf[0] == '\t');
  55
  56                         for (hp = hentry, hnum = 0; hp->name != NULL;
  57                              hp++, hnum++) {
  58                                 if (!strncasecmp(hp->name, buf,
  59                                                  strlen(hp->name)))
  60                                         break;
  61                         }
  62                 } while (hp->name == NULL);
  63         } else {
  64                 if (fgets(buf, len, fp) == NULL) return -1;
  65                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
  66         }
  67
  68         /* unfold the specified folded line */
  69         if (hp && hp->unfold) {
  70                 gboolean folded = FALSE;
  71                 gchar *bufp = buf + strlen(buf);
  72
  73                 while (1) {
  74                         nexthead = fgetc(fp);
  75
  76                         /* folded */
  77                         if (nexthead == ' ' || nexthead == '\t')
  78                                 folded = TRUE;
  79                         else if (nexthead == EOF)
  80                                 break;
  81                         else if (folded == TRUE) {
  82                                 /* concatenate next line */
  83                                 if ((len - (bufp - buf)) <= 2) break;
  84
  85                                 /* replace return code on the tail end
  86                                    with space */
  87                                 *(bufp - 1) = ' ';
  88                                 *bufp++ = nexthead;
  89                                 *bufp = '\0';
  90                                 if (nexthead == '\r' || nexthead == '\n') {
  91                                         folded = FALSE;
  92                                         continue;
  93                                 }
  94                                 if (fgets(bufp, len - (bufp - buf), fp)
  95                                     == NULL) break;
  96                                 bufp += strlen(bufp);
  97
  98                                 folded = FALSE;
  99                         } else {
 100                                 ungetc(nexthead, fp);
 101                                 break;
 102                         }
 103                 }
 104
 105                 /* remove trailing return code */
 106                 strretchomp(buf);
 107
 108                 return hnum;
 109         }
 110
 111         while (1) {
 112                 nexthead = fgetc(fp);
 113                 if (nexthead == ' ' || nexthead == '\t') {
 114                         size_t buflen = strlen(buf);
 115
 116                         /* concatenate next line */
 117                         if ((len - buflen) > 2) {
 118                                 gchar *p = buf + buflen;
 119
 120                                 *p++ = nexthead;
 121                                 *p = '\0';
 122                                 buflen++;
 123                                 if (fgets(p, len - buflen, fp) == NULL)
 124                                         break;
 125                         } else
 126                                 break;
 127                 } else {
 128                         if (nexthead != EOF)
 129                                 ungetc(nexthead, fp);
 130                         break;
 131                 }
 132         }
 133
 134         /* remove trailing return code */
 135         strretchomp(buf);
 136
 137         return hnum;
 138 }
 139
 140 gchar *procheader_get_unfolded_line(gchar *buf, gint len, FILE *fp)
 141 {
 142         gboolean folded = FALSE;
 143         gint nexthead;
 144         gchar *bufp;
 145
 146         if (fgets(buf, len, fp) == NULL) return NULL;
 147         if (buf[0] == '\r' || buf[0] == '\n') return NULL;
 148         bufp = buf + strlen(buf);
 149
 150         while (1) {
 151                 nexthead = fgetc(fp);
 152
 153                 /* folded */
 154                 if (nexthead == ' ' || nexthead == '\t')
 155                         folded = TRUE;
 156                 else if (nexthead == EOF)
 157                         break;
 158                 else if (folded == TRUE) {
 159                         /* concatenate next line */
 160                         if ((len - (bufp - buf)) <= 2) break;
 161
 162                         /* replace return code on the tail end
 163                            with space */
 164                         *(bufp - 1) = ' ';
 165                         *bufp++ = nexthead;
 166                         *bufp = '\0';
 167                         if (nexthead == '\r' || nexthead == '\n') {
 168                                 folded = FALSE;
 169                                 continue;
 170                         }
 171                         if (fgets(bufp, len - (bufp - buf), fp)
 172                             == NULL) break;
 173                         bufp += strlen(bufp);
 174
 175                         folded = FALSE;
 176                 } else {
 177                         ungetc(nexthead, fp);
 178                         break;
 179                 }
 180         }
 181
 182         /* remove trailing return code */
 183         strretchomp(buf);
 184
 185         return buf;
 186 }
 187
 188 GSList *procheader_get_header_list_from_file(const gchar *file)
 189 {
 190         FILE *fp;
 191         GSList *hlist;
 192
 193         if ((fp = fopen(file, "r")) == NULL) {
 194                 FILE_OP_ERROR(file, "fopen");
 195                 return NULL;
 196         }
 197
 198         hlist = procheader_get_header_list(fp);
 199
 200         fclose(fp);
 201         return hlist;
 202 }
 203
 204 GSList *procheader_get_header_list(FILE *fp)
 205 {
 206         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 207         gchar *p;
 208         GSList *hlist = NULL;
 209         Header *header;
 210
 211         g_return_val_if_fail(fp != NULL, NULL);
 212
 213         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 214                 if (header = procheader_parse_header(buf))
 215                         g_ptr_array_add(headers, header);
 216                 /*
 217                 if (*buf == ':') continue;
 218                 for (p = buf; *p && *p != ' '; p++) {
 219                         if (*p == ':') {
 220                                 header = g_new(Header, 1);
 221                                 header->name = g_strndup(buf, p - buf);
 222                                 p++;
 223                                 while (*p == ' ' || *p == '\t') p++;
 224                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 225                                 header->body = g_strdup(tmp);
 226
 227                                 hlist = g_slist_append(hlist, header);
 228                                 break;
 229                         }
 230                 }
 231                 */
 232         }
 233
 234         return hlist;
 235 }
 236
 237 GPtrArray *procheader_get_header_array(FILE *fp)
 238 {
 239         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 240         gchar *p;
 241         GPtrArray *headers;
 242         Header *header;
 243
 244         g_return_val_if_fail(fp != NULL, NULL);
 245
 246         headers = g_ptr_array_new();
 247
 248         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 249                 if (header = procheader_parse_header(buf))
 250                         g_ptr_array_add(headers, header);
 251                 /*
 252                 if (*buf == ':') continue;
 253                 for (p = buf; *p && *p != ' '; p++) {
 254                         if (*p == ':') {
 255                                 header = g_new(Header, 1);
 256                                 header->name = g_strndup(buf, p - buf);
 257                                 p++;
 258                                 while (*p == ' ' || *p == '\t') p++;
 259                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 260                                 header->body = g_strdup(tmp);
 261
 262                                 g_ptr_array_add(headers, header);
 263                                 break;
 264                         }
 265                 */
 266                 }
 267         }
 268
 269         return headers;
 270 }
 271
 272 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 273 {
 274         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 275         gchar *p;
 276         GPtrArray *headers;
 277         Header *header;
 278
 279         g_return_val_if_fail(fp != NULL, NULL);
 280
 281         headers = g_ptr_array_new();
 282
 283         while (procheader_get_one_field(buf, sizeof(buf), fp, NULL) != -1) {
 284                 if (header = procheader_parse_header(buf))
 285                         g_ptr_array_add(headers, header);
 286                         /*
 287                 if (*buf == ':') continue;
 288                 for (p = buf; *p && *p != ' '; p++) {
 289                         if (*p == ':') {
 290                                 header = g_new(Header, 1);
 291                                 header->name = g_strndup(buf, p - buf);
 292                                 p++;
 293                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 294                                 header->body = g_strdup(tmp);
 295
 296                                 g_ptr_array_add(headers, header);
 297                                 break;
 298                         }
 299                 }
 300                         */
 301         }
 302
 303         return headers;
 304 }
 305
 306 void procheader_header_list_destroy(GSList *hlist)
 307 {
 308         Header *header;
 309
 310         while (hlist != NULL) {
 311                 header = hlist->data;
 312                 procheader_header_free(header);
 313                 hlist = g_slist_remove(hlist, header);
 314         }
 315 }
 316
 317 void procheader_header_array_destroy(GPtrArray *harray)
 318 {
 319         gint i;
 320         Header *header;
 321
 322         for (i = 0; i < harray->len; i++) {
 323                 header = g_ptr_array_index(harray, i);
 324                 procheader_header_free(header);
 325         }
 326
 327         g_ptr_array_free(harray, TRUE);
 328 }
 329
 330 void procheader_header_free(Header *header)
 331 {
 332         if (!header) return;
 333
 334         g_free(header->name);
 335         g_free(header->body);
 336         g_free(header);
 337 }
 338
 339 /*
 340   tests whether two headers' names are equal
 341   remove the trailing ':' or ' ' before comparing
 342 */
 343
 344 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 345 {
 346         int len1;
 347         int len2;
 348
 349         len1 = strlen(hdr1);
 350         len2 = strlen(hdr2);
 351         if ((hdr1[len1 - 1] == ':') || (hdr1[len1 - 1] == ' '))
 352                 len1--;
 353         if ((hdr2[len2 - 1] == ':') || (hdr2[len2 - 1] == ' '))
 354                 len2--;
 355         if (len1 != len2)
 356                 return 0;
 357         return (g_strncasecmp(hdr1, hdr2, len1) == 0);
 358 }
 359
 360 /*
 361   parse headers, for example :
 362   From: dinh@enseirb.fr becomes :
 363   header->name = "From:"
 364   header->body = "dinh@enseirb.fr"
 365  */
 366
 367 Header * procheader_parse_header(gchar * buf)
 368 {
 369         gchar tmp[BUFFSIZE];
 370         gchar *p = buf;
 371         Header * header;
 372
 373         if ((*buf == ':') || (*buf == ' '))
 374                 return NULL;
 375
 376         for (p = buf; *p ; p++) {
 377                 if ((*p == ':') || (*p == ' ')) {
 378                         header = g_new(Header, 1);
 379                         header->name = g_strndup(buf, p - buf + 1);
 380                         p++;
 381                         while (*p == ' ' || *p == '\t') p++;
 382                         conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 383                         header->body = g_strdup(tmp);
 384                         return header;
 385                 }
 386         }
 387         return NULL;
 388 }
 389
 390 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 391 {
 392         gchar buf[BUFFSIZE];
 393         HeaderEntry *hp;
 394         gint hnum;
 395         gchar *p;
 396
 397         if (hentry == NULL) return;
 398
 399         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 400                != -1) {
 401                 hp = hentry + hnum;
 402
 403                 p = buf + strlen(hp->name);
 404                 while (*p == ' ' || *p == '\t') p++;
 405
 406                 if (hp->body == NULL)
 407                         hp->body = g_strdup(p);
 408                 else if (procheader_headername_equal(hp->name, "To") ||
 409                          procheader_headername_equal(hp->name, "Cc")) {
 410                         gchar *tp = hp->body;
 411                         hp->body = g_strconcat(tp, ", ", p, NULL);
 412                         g_free(tp);
 413                 }
 414         }
 415 }
 416
 417 enum
 418 {
 419         H_DATE          = 0,
 420         H_FROM          = 1,
 421         H_TO            = 2,
 422         H_CC            = 3,
 423         H_NEWSGROUPS    = 4,
 424         H_SUBJECT       = 5,
 425         H_MSG_ID        = 6,
 426         H_REFERENCES    = 7,
 427         H_IN_REPLY_TO   = 8,
 428         H_CONTENT_TYPE  = 9,
 429         H_SEEN          = 10,
 430         H_X_FACE        = 11,
 431         H_DISPOSITION_NOTIFICATION_TO = 12
 432 };
 433
 434 MsgInfo *procheader_parse(const gchar *file, MsgFlags flags, gboolean full)
 435 {
 436         static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 437                                            {"From:",            NULL, TRUE},
 438                                            {"To:",              NULL, TRUE},
 439                                            {"Cc:",              NULL, TRUE},
 440                                            {"Newsgroups:",      NULL, TRUE},
 441                                            {"Subject:",         NULL, TRUE},
 442                                            {"Message-Id:",      NULL, FALSE},
 443                                            {"References:",      NULL, FALSE},
 444                                            {"In-Reply-To:",     NULL, FALSE},
 445                                            {"Content-Type:",    NULL, FALSE},
 446                                            {"Seen:",            NULL, FALSE},
 447                                            {"X-Face:",          NULL, FALSE},
 448                                            {"Disposition-Notification-To:",NULL, FALSE},
 449                                            {NULL,               NULL, FALSE}};
 450
 451         static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 452                                             {"From:",           NULL, TRUE},
 453                                             {"To:",             NULL, TRUE},
 454                                             {"Cc:",             NULL, TRUE},
 455                                             {"Newsgroups:",     NULL, TRUE},
 456                                             {"Subject:",        NULL, TRUE},
 457                                             {"Message-Id:",     NULL, FALSE},
 458                                             {"References:",     NULL, FALSE},
 459                                             {"In-Reply-To:",    NULL, FALSE},
 460                                             {"Content-Type:",   NULL, FALSE},
 461                                             {"Seen:",           NULL, FALSE},
 462                                             {NULL,              NULL, FALSE}};
 463
 464         FILE *fp;
 465         MsgInfo *msginfo;
 466         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 467         gchar *reference = NULL;
 468         gchar *p;
 469         gchar *hp;
 470         HeaderEntry *hentry;
 471         gint hnum;
 472
 473         hentry = full ? hentry_full : hentry_short;
 474
 475         if ((fp = fopen(file, "r")) == NULL) {
 476                 FILE_OP_ERROR(file, "fopen");
 477                 return NULL;
 478         }
 479         if (MSG_IS_QUEUED(flags)) {
 480                 while (fgets(buf, sizeof(buf), fp) != NULL)
 481                         if (buf[0] == '\r' || buf[0] == '\n') break;
 482         }
 483
 484         msginfo = g_new0(MsgInfo, 1);
 485         msginfo->flags = flags != 0 ? flags : MSG_NEW|MSG_UNREAD;
 486         msginfo->inreplyto = NULL;
 487
 488         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 489                != -1) {
 490                 hp = buf + strlen(hentry[hnum].name);
 491                 while (*hp == ' ' || *hp == '\t') hp++;
 492
 493                 switch (hnum) {
 494                 case H_DATE:
 495                         if (msginfo->date) break;
 496                         msginfo->date_t =
 497                                 procheader_date_parse(NULL, hp, 0);
 498                         msginfo->date = g_strdup(hp);
 499                         break;
 500                 case H_FROM:
 501                         if (msginfo->from) break;
 502                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 503                         msginfo->from = g_strdup(tmp);
 504                         msginfo->fromname = procheader_get_fromname(tmp);
 505                         break;
 506                 case H_TO:
 507                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 508                         if (msginfo->to) {
 509                                 p = msginfo->to;
 510                                 msginfo->to =
 511                                         g_strconcat(p, ", ", tmp, NULL);
 512                                 g_free(p);
 513                         } else
 514                                 msginfo->to = g_strdup(tmp);
 515                         break;
 516                 case H_CC:
 517                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 518                         if (msginfo->cc) {
 519                                 p = msginfo->cc;
 520                                 msginfo->cc =
 521                                         g_strconcat(p, ", ", tmp, NULL);
 522                                 g_free(p);
 523                         } else
 524                                 msginfo->cc = g_strdup(tmp);
 525                         break;
 526                 case H_NEWSGROUPS:
 527                         if (msginfo->newsgroups) {
 528                                 p = msginfo->newsgroups;
 529                                 msginfo->newsgroups =
 530                                         g_strconcat(p, ",", hp, NULL);
 531                                 g_free(p);
 532                         } else
 533                                 msginfo->newsgroups = g_strdup(buf + 12);
 534                         break;
 535                 case H_SUBJECT:
 536                         if (msginfo->subject) break;
 537                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 538                         msginfo->subject = g_strdup(tmp);
 539                         break;
 540                 case H_MSG_ID:
 541                         if (msginfo->msgid) break;
 542
 543                         extract_parenthesis(hp, '<', '>');
 544                         remove_space(hp);
 545                         msginfo->msgid = g_strdup(hp);
 546                         break;
 547                 case H_REFERENCES:
 548                         if (!reference) {
 549                                 eliminate_parenthesis(hp, '(', ')');
 550                                 if ((p = strrchr(hp, '<')) != NULL &&
 551                                     strchr(p + 1, '>') != NULL) {
 552                                         extract_parenthesis(p, '<', '>');
 553                                         remove_space(p);
 554                                         if (*p != '\0')
 555                                                 reference = g_strdup(p);
 556                                 }
 557                         }
 558                         break;
 559                 case H_IN_REPLY_TO:
 560                         if (!reference) {
 561                                 eliminate_parenthesis(hp, '(', ')');
 562                                 extract_parenthesis(hp, '<', '>');
 563                                 remove_space(hp);
 564                                 if (*hp != '\0')
 565                                         reference = g_strdup(hp);
 566                         }
 567                         break;
 568                 case H_CONTENT_TYPE:
 569                         if (!strncasecmp(hp, "multipart", 9))
 570                                 msginfo->flags |= MSG_MIME;
 571                         break;
 572                 case H_SEEN:
 573                         /* mnews Seen header */
 574                         MSG_UNSET_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 575                         break;
 576                 case H_X_FACE:
 577                         if (msginfo->xface) break;
 578                         msginfo->xface = g_strdup(hp);
 579                         break;
 580                 case H_DISPOSITION_NOTIFICATION_TO:
 581                         if (msginfo->dispositionnotificationto) break;
 582                         msginfo->dispositionnotificationto = g_strdup(hp);
 583                         break;
 584                 default:
 585                 }
 586         }
 587         msginfo->inreplyto = reference;
 588
 589         fclose(fp);
 590
 591         return msginfo;
 592 }
 593
 594 gchar *procheader_get_fromname(const gchar *str)
 595 {
 596         gchar *tmp, *name;
 597
 598         Xalloca(tmp, strlen(str) + 1, return NULL);
 599         strcpy(tmp, str);
 600
 601         if (*tmp == '\"') {
 602                 extract_quote(tmp, '\"');
 603                 g_strstrip(tmp);
 604         } else if (strchr(tmp, '<')) {
 605                 eliminate_parenthesis(tmp, '<', '>');
 606                 g_strstrip(tmp);
 607                 if (*tmp == '\0') {
 608                         strcpy(tmp, str);
 609                         extract_parenthesis(tmp, '<', '>');
 610                         g_strstrip(tmp);
 611                 }
 612         } else if (strchr(tmp, '(')) {
 613                 extract_parenthesis(tmp, '(', ')');
 614                 g_strstrip(tmp);
 615         }
 616
 617         if (*tmp == '\0')
 618                 name = g_strdup(str);
 619         else
 620                 name = g_strdup(tmp);
 621
 622         return name;
 623 }
 624
 625 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 626 {
 627         static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
 628         gchar weekday[4];
 629         gint day;
 630         gchar month[4];
 631         gint year;
 632         gint hh, mm, ss;
 633         gchar zone[6];
 634         gint result;
 635         GDateMonth dmonth;
 636         struct tm t;
 637         gchar *p;
 638         time_t timer;
 639
 640         /* parsing date field... */
 641         result = sscanf(src, "%3s, %d %3s %d %2d:%2d:%2d %5s",
 642                         weekday, &day, month, &year, &hh, &mm, &ss, zone);
 643         if (result != 8) {
 644                 result = sscanf(src, "%d %3s %d %2d:%2d:%2d %5s",
 645                                 &day, month, &year, &hh, &mm, &ss, zone);
 646                 if (result != 7) {
 647                         ss = 0;
 648                         result = sscanf(src, "%3s, %d %3s %d %2d:%2d %5s",
 649                                         weekday, &day, month, &year, &hh, &mm, zone);
 650                         if (result != 7) {
 651                                 result = sscanf(src, "%d %3s %d %2d:%2d %5s",
 652                                                 &day, month, &year, &hh, &mm,
 653                                                 zone);
 654                                 if (result != 6) {
 655                                         g_warning("Invalid date: %s\n", src);
 656                                         if (dest && len > 0)
 657                                                 strncpy2(dest, src, len);
 658                                         return 0;
 659                                 }
 660                         }
 661                 }
 662         }
 663
 664         /* Y2K compliant :) */
 665         if (year < 100) {
 666                 if (year < 70)
 667                         year += 2000;
 668                 else
 669                         year += 1900;
 670         }
 671
 672         if ((p = strstr(monthstr, month)) != NULL)
 673                 dmonth = (gint)(p - monthstr) / 3 + 1;
 674         else {
 675                 g_warning("Invalid month: %s\n", month);
 676                 dmonth = G_DATE_BAD_MONTH;
 677         }
 678
 679         t.tm_sec = ss;
 680         t.tm_min = mm;
 681         t.tm_hour = hh;
 682         t.tm_mday = day;
 683         t.tm_mon = dmonth - 1;
 684         t.tm_year = year - 1900;
 685         t.tm_wday = 0;
 686         t.tm_yday = 0;
 687         t.tm_isdst = -1;
 688
 689         timer = mktime(&t);
 690         timer += tzoffset_sec(&timer) - remote_tzoffset_sec(zone);
 691
 692         if (dest)
 693                 procheader_date_get_localtime(dest, len, timer);
 694
 695         return timer;
 696 }
 697
 698 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 699 {
 700         struct tm *lt;
 701         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 702
 703         lt = localtime(&timer);
 704
 705         if (prefs_common.date_format)
 706                 strftime(dest, len, prefs_common.date_format, lt);
 707         else
 708                 strftime(dest, len, default_format, lt);
 709 }