src/utils.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 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 "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <ctype.h>
  30 #include <errno.h>
  31 #include <netdb.h>
  32
  33 #if (HAVE_WCTYPE_H && HAVE_WCHAR_H)
  34 #  include <wchar.h>
  35 #  include <wctype.h>
  36 #endif
  37 #include <stdlib.h>
  38 #include <sys/stat.h>
  39 #include <unistd.h>
  40 #include <stdarg.h>
  41 #include <sys/types.h>
  42 #include <sys/wait.h>
  43 #include <dirent.h>
  44 #include <time.h>
  45
  46 #include "intl.h"
  47 #include "utils.h"
  48 #include "statusbar.h"
  49 #include "logwindow.h"
  50
  51 #define BUFFSIZE        8192
  52
  53 extern gboolean debug_mode;
  54
  55 static void hash_free_strings_func(gpointer key, gpointer value, gpointer data);
  56
  57 void list_free_strings(GList *list)
  58 {
  59         list = g_list_first(list);
  60
  61         while (list != NULL) {
  62                 g_free(list->data);
  63                 list = list->next;
  64         }
  65 }
  66
  67 void slist_free_strings(GSList *list)
  68 {
  69         while (list != NULL) {
  70                 g_free(list->data);
  71                 list = list->next;
  72         }
  73 }
  74
  75 static void hash_free_strings_func(gpointer key, gpointer value, gpointer data)
  76 {
  77         g_free(key);
  78 }
  79
  80 void hash_free_strings(GHashTable *table)
  81 {
  82         g_hash_table_foreach(table, hash_free_strings_func, NULL);
  83 }
  84
  85 static void hash_free_value_mem_func(gpointer key, gpointer value,
  86                                      gpointer data)
  87 {
  88         g_free(value);
  89 }
  90
  91 void hash_free_value_mem(GHashTable *table)
  92 {
  93         g_hash_table_foreach(table, hash_free_value_mem_func, NULL);
  94 }
  95
  96 void ptr_array_free_strings(GPtrArray *array)
  97 {
  98         gint i;
  99         gchar *str;
 100
 101         g_return_if_fail(array != NULL);
 102
 103         for (i = 0; i < array->len; i++) {
 104                 str = g_ptr_array_index(array, i);
 105                 g_free(str);
 106         }
 107 }
 108
 109 gint to_number(const gchar *nstr)
 110 {
 111         register const gchar *p;
 112
 113         if (*nstr == '\0') return -1;
 114
 115         for (p = nstr; *p != '\0'; p++)
 116                 if (!isdigit(*p)) return -1;
 117
 118         return atoi(nstr);
 119 }
 120
 121 /* convert integer into string,
 122    nstr must be not lower than 11 characters length */
 123 gchar *itos_buf(gchar *nstr, gint n)
 124 {
 125         g_snprintf(nstr, 11, "%d", n);
 126         return nstr;
 127 }
 128
 129 /* convert integer into string */
 130 gchar *itos(gint n)
 131 {
 132         static gchar nstr[11];
 133
 134         return itos_buf(nstr, n);
 135 }
 136
 137 gchar *to_human_readable(off_t size)
 138 {
 139         static gchar str[10];
 140
 141         if (size < 1024)
 142                 g_snprintf(str, sizeof(str), "%dB", (gint)size);
 143         else if (size >> 10 < 1024)
 144                 g_snprintf(str, sizeof(str), "%.1fKB", (gfloat)size / (1 << 10));
 145         else if (size >> 20 < 1024)
 146                 g_snprintf(str, sizeof(str), "%.2fMB", (gfloat)size / (1 << 20));
 147         else
 148                 g_snprintf(str, sizeof(str), "%.2fGB", (gfloat)size / (1 << 30));
 149
 150         return str;
 151 }
 152
 153 /* strcmp with NULL-checking */
 154 gint strcmp2(const gchar *s1, const gchar *s2)
 155 {
 156         if (s1 == NULL || s2 == NULL)
 157                 return -1;
 158         else
 159                 return strcmp(s1, s2);
 160 }
 161 /* strstr with NULL-checking */
 162 gchar *strstr2(const gchar *s1, const gchar *s2)
 163 {
 164         if (s1 == NULL || s2 == NULL)
 165                 return NULL;
 166         else
 167                 return strstr(s1, s2);
 168 }
 169 /* compare paths */
 170 gint path_cmp(const gchar *s1, const gchar *s2)
 171 {
 172         gint len1, len2;
 173
 174         if (s1 == NULL || s2 == NULL) return -1;
 175         if (*s1 == '\0' || *s2 == '\0') return -1;
 176
 177         len1 = strlen(s1);
 178         len2 = strlen(s2);
 179
 180         if (s1[len1 - 1] == G_DIR_SEPARATOR) len1--;
 181         if (s2[len2 - 1] == G_DIR_SEPARATOR) len2--;
 182
 183         return strncmp(s1, s2, MAX(len1, len2));
 184 }
 185
 186 /* remove trailing return code */
 187 gchar *strretchomp(gchar *str)
 188 {
 189         register gchar *s;
 190
 191         if (!*str) return str;
 192
 193         for (s = str + strlen(str) - 1;
 194              s >= str && (*s == '\n' || *s == '\r');
 195              s--)
 196                 *s = '\0';
 197
 198         return str;
 199 }
 200
 201 /* remove trailing character */
 202 gchar *strtailchomp(gchar *str, gchar tail_char)
 203 {
 204         register gchar *s;
 205
 206         if (!*str) return str;
 207         if (tail_char == '\0') return str;
 208
 209         for (s = str + strlen(str) - 1; s >= str && *s == tail_char; s--)
 210                 *s = '\0';
 211
 212         return str;
 213 }
 214
 215 /* remove CR (carriage return) */
 216 gchar *strcrchomp(gchar *str)
 217 {
 218         register gchar *s;
 219
 220         if (!*str) return str;
 221
 222         s = str + strlen(str) - 1;
 223         if (*s == '\n' && s > str && *(s - 1) == '\r') {
 224                 *(s - 1) = '\n';
 225                 *s = '\0';
 226         }
 227
 228         return str;
 229 }
 230
 231 /* Similar to `strstr' but this function ignores the case of both strings.  */
 232 gchar *strcasestr(const gchar *haystack, const gchar *needle)
 233 {
 234         register size_t haystack_len, needle_len;
 235
 236         haystack_len = strlen(haystack);
 237         needle_len   = strlen(needle);
 238
 239         if (haystack_len < needle_len || needle_len == 0)
 240                 return NULL;
 241
 242         while (haystack_len >= needle_len) {
 243                 if (!strncasecmp(haystack, needle, needle_len))
 244                         return (gchar *)haystack;
 245                 else {
 246                         haystack++;
 247                         haystack_len--;
 248                 }
 249         }
 250
 251         return NULL;
 252 }
 253
 254 /* Copy no more than N characters of SRC to DEST, with NULL terminating.  */
 255 gchar *strncpy2(gchar *dest, const gchar *src, size_t n)
 256 {
 257         register gchar c;
 258         gchar *s = dest;
 259
 260         do {
 261                 if (--n == 0) {
 262                         *dest = '\0';
 263                         return s;
 264                 }
 265                 c = *src++;
 266                 *dest++ = c;
 267         } while (c != '\0');
 268
 269         /* don't do zero fill */
 270         return s;
 271 }
 272
 273 #if !HAVE_ISWALNUM
 274 int iswalnum(wint_t wc)
 275 {
 276         return isalnum((int)wc);
 277 }
 278 #endif
 279
 280 #if !HAVE_ISWSPACE
 281 int iswspace(wint_t wc)
 282 {
 283         return isspace((int)wc);
 284 }
 285 #endif
 286
 287 #if !HAVE_TOWLOWER
 288 wint_t towlower(wint_t wc)
 289 {
 290         if (wc >= L'A' && wc <= L'Z')
 291                 return wc + L'a' - L'A';
 292
 293         return wc;
 294 }
 295 #endif
 296
 297 #if !HAVE_WCSLEN
 298 size_t wcslen(const wchar_t *s)
 299 {
 300         size_t len = 0;
 301
 302         while (*s != L'\0')
 303                 ++len, ++s;
 304
 305         return len;
 306 }
 307 #endif
 308
 309 #if !HAVE_WCSCPY
 310 /* Copy SRC to DEST.  */
 311 wchar_t *wcscpy(wchar_t *dest, const wchar_t *src)
 312 {
 313         wint_t c;
 314         wchar_t *s = dest;
 315
 316         do {
 317                 c = *src++;
 318                 *dest++ = c;
 319         } while (c != L'\0');
 320
 321         return s;
 322 }
 323 #endif
 324
 325 #if !HAVE_WCSNCPY
 326 /* Copy no more than N wide-characters of SRC to DEST.  */
 327 wchar_t *wcsncpy (wchar_t *dest, const wchar_t *src, size_t n)
 328 {
 329         wint_t c;
 330         wchar_t *s = dest;
 331
 332         do {
 333                 c = *src++;
 334                 *dest++ = c;
 335                 if (--n == 0)
 336                         return s;
 337         } while (c != L'\0');
 338
 339         /* zero fill */
 340         do
 341                 *dest++ = L'\0';
 342         while (--n > 0);
 343
 344         return s;
 345 }
 346 #endif
 347
 348 /* Duplicate S, returning an identical malloc'd string. */
 349 wchar_t *wcsdup(const wchar_t *s)
 350 {
 351         wchar_t *new_str;
 352
 353         if (s) {
 354                 new_str = g_new(wchar_t, wcslen(s) + 1);
 355                 wcscpy(new_str, s);
 356         } else
 357                 new_str = NULL;
 358
 359         return new_str;
 360 }
 361
 362 /* Duplicate no more than N wide-characters of S,
 363    returning an identical malloc'd string. */
 364 wchar_t *wcsndup(const wchar_t *s, size_t n)
 365 {
 366         wchar_t *new_str;
 367
 368         if (s) {
 369                 new_str = g_new(wchar_t, n + 1);
 370                 wcsncpy(new_str, s, n);
 371                 new_str[n] = (wchar_t)0;
 372         } else
 373                 new_str = NULL;
 374
 375         return new_str;
 376 }
 377
 378 wchar_t *strdup_mbstowcs(const gchar *s)
 379 {
 380         wchar_t *new_str;
 381
 382         if (s) {
 383                 new_str = g_new(wchar_t, strlen(s) + 1);
 384                 if (mbstowcs(new_str, s, strlen(s) + 1) < 0) {
 385                         g_free(new_str);
 386                         new_str = NULL;
 387                 } else
 388                         new_str = g_realloc(new_str,
 389                                             sizeof(wchar_t) * (wcslen(new_str) + 1));
 390         } else
 391                 new_str = NULL;
 392
 393         return new_str;
 394 }
 395
 396 gchar *strdup_wcstombs(const wchar_t *s)
 397 {
 398         gchar *new_str;
 399         size_t len;
 400
 401         if (s) {
 402                 len = wcslen(s) * MB_CUR_MAX + 1;
 403                 new_str = g_new(gchar, len);
 404                 if (wcstombs(new_str, s, len) < 0) {
 405                         g_free(new_str);
 406                         new_str = NULL;
 407                 } else
 408                         new_str = g_realloc(new_str, strlen(new_str) + 1);
 409         } else
 410                 new_str = NULL;
 411
 412         return new_str;
 413 }
 414
 415 /* Compare S1 and S2, ignoring case.  */
 416 gint wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
 417 {
 418         wint_t c1;
 419         wint_t c2;
 420
 421         while (n--) {
 422                 c1 = towlower(*s1++);
 423                 c2 = towlower(*s2++);
 424                 if (c1 != c2)
 425                         return c1 - c2;
 426                 else if (c1 == 0 && c2 == 0)
 427                         break;
 428         }
 429
 430         return 0;
 431 }
 432
 433 /* Find the first occurrence of NEEDLE in HAYSTACK, ignoring case.  */
 434 wchar_t *wcscasestr(const wchar_t *haystack, const wchar_t *needle)
 435 {
 436         register size_t haystack_len, needle_len;
 437
 438         haystack_len = wcslen(haystack);
 439         needle_len   = wcslen(needle);
 440
 441         if (haystack_len < needle_len || needle_len == 0)
 442                 return NULL;
 443
 444         while (haystack_len >= needle_len) {
 445                 if (!wcsncasecmp(haystack, needle, needle_len))
 446                         return (wchar_t *)haystack;
 447                 else {
 448                         haystack++;
 449                         haystack_len--;
 450                 }
 451         }
 452
 453         return NULL;
 454 }
 455
 456 /* Examine if next block is non-ASCII string */
 457 gboolean is_next_nonascii(const wchar_t *s)
 458 {
 459         const wchar_t *wp;
 460
 461         /* skip head space */
 462         for (wp = s; *wp != (wchar_t)0 && iswspace(*wp); wp++)
 463                 ;
 464         for (; *wp != (wchar_t)0 && !iswspace(*wp); wp++) {
 465                 if (*wp > 127)
 466                         return TRUE;
 467         }
 468
 469         return FALSE;
 470 }
 471
 472 /* Examine if next block is multi-byte string */
 473 gboolean is_next_mbs(const wchar_t *s)
 474 {
 475         gint mbl;
 476         const wchar_t *wp;
 477         gchar tmp[MB_LEN_MAX];
 478
 479         /* skip head space */
 480         for (wp = s; *wp != (wchar_t)0 && iswspace(*wp); wp++)
 481                 ;
 482         for (; *wp != (wchar_t)0 && !iswspace(*wp); wp++) {
 483                 mbl = wctomb(tmp, *wp);
 484                 if (mbl > 1)
 485                         return TRUE;
 486         }
 487
 488         return FALSE;
 489 }
 490
 491 wchar_t *find_wspace(const wchar_t *s)
 492 {
 493         const wchar_t *wp;
 494
 495         for (wp = s; *wp != (wchar_t)0 && iswspace(*wp); wp++)
 496                 ;
 497         for (; *wp != (wchar_t)0; wp++) {
 498                 if (iswspace(*wp))
 499                         return (wchar_t *)wp;
 500         }
 501
 502         return NULL;
 503 }
 504
 505 /* compare subjects */
 506 gint subject_compare(const gchar *s1, const gchar *s2)
 507 {
 508         gchar *str1, *str2;
 509
 510         if (!s1 || !s2) return -1;
 511         if (!*s1 || !*s2) return -1;
 512
 513         Xstrdup_a(str1, s1, return -1);
 514         Xstrdup_a(str2, s2, return -1);
 515
 516         trim_subject(str1);
 517         trim_subject(str2);
 518
 519         if (!*str1 || !*str2) return -1;
 520
 521         return strcmp(str1, str2);
 522 }
 523
 524 void trim_subject(gchar *str)
 525 {
 526         gchar *srcp;
 527
 528         eliminate_parenthesis(str, '[', ']');
 529         eliminate_parenthesis(str, '(', ')');
 530         g_strstrip(str);
 531
 532         while (!strncasecmp(str, "Re:", 3)) {
 533                 srcp = str + 3;
 534                 while (isspace(*srcp)) srcp++;
 535                 memmove(str, srcp, strlen(srcp) + 1);
 536         }
 537 }
 538
 539 void eliminate_parenthesis(gchar *str, gchar op, gchar cl)
 540 {
 541         register gchar *srcp, *destp;
 542         gint in_brace;
 543
 544         srcp = destp = str;
 545
 546         while ((destp = strchr(destp, op))) {
 547                 in_brace = 1;
 548                 srcp = destp + 1;
 549                 while (*srcp) {
 550                         if (*srcp == op)
 551                                 in_brace++;
 552                         else if (*srcp == cl)
 553                                 in_brace--;
 554                         srcp++;
 555                         if (in_brace == 0)
 556                                 break;
 557                 }
 558                 while (isspace(*srcp)) srcp++;
 559                 memmove(destp, srcp, strlen(srcp) + 1);
 560         }
 561 }
 562
 563 void extract_parenthesis(gchar *str, gchar op, gchar cl)
 564 {
 565         register gchar *srcp, *destp;
 566         gint in_brace;
 567
 568         srcp = destp = str;
 569
 570         while ((srcp = strchr(destp, op))) {
 571                 if (destp > str)
 572                         *destp++ = ' ';
 573                 memmove(destp, srcp + 1, strlen(srcp));
 574                 in_brace = 1;
 575                 while(*destp) {
 576                         if (*destp == op)
 577                                 in_brace++;
 578                         else if (*destp == cl)
 579                                 in_brace--;
 580
 581                         if (in_brace == 0)
 582                                 break;
 583
 584                         destp++;
 585                 }
 586         }
 587         *destp = '\0';
 588 }
 589
 590 void extract_one_parenthesis_with_skip_quote(gchar *str, gchar quote_chr,
 591                                              gchar op, gchar cl)
 592 {
 593         register gchar *srcp, *destp;
 594         gint in_brace;
 595         gboolean in_quote = FALSE;
 596
 597         srcp = destp = str;
 598
 599         if ((srcp = strchr_with_skip_quote(destp, quote_chr, op))) {
 600                 memmove(destp, srcp + 1, strlen(srcp));
 601                 in_brace = 1;
 602                 while(*destp) {
 603                         if (*destp == op && !in_quote)
 604                                 in_brace++;
 605                         else if (*destp == cl && !in_quote)
 606                                 in_brace--;
 607                         else if (*destp == quote_chr)
 608                                 in_quote ^= TRUE;
 609
 610                         if (in_brace == 0)
 611                                 break;
 612
 613                         destp++;
 614                 }
 615         }
 616         *destp = '\0';
 617 }
 618
 619 void extract_parenthesis_with_skip_quote(gchar *str, gchar quote_chr,
 620                                          gchar op, gchar cl)
 621 {
 622         register gchar *srcp, *destp;
 623         gint in_brace;
 624         gboolean in_quote = FALSE;
 625
 626         srcp = destp = str;
 627
 628         while ((srcp = strchr_with_skip_quote(destp, quote_chr, op))) {
 629                 if (destp > str)
 630                         *destp++ = ' ';
 631                 memmove(destp, srcp + 1, strlen(srcp));
 632                 in_brace = 1;
 633                 while(*destp) {
 634                         if (*destp == op && !in_quote)
 635                                 in_brace++;
 636                         else if (*destp == cl && !in_quote)
 637                                 in_brace--;
 638                         else if (*destp == quote_chr)
 639                                 in_quote ^= TRUE;
 640
 641                         if (in_brace == 0)
 642                                 break;
 643
 644                         destp++;
 645                 }
 646         }
 647         *destp = '\0';
 648 }
 649
 650 void eliminate_quote(gchar *str, gchar quote_chr)
 651 {
 652         register gchar *srcp, *destp;
 653
 654         srcp = destp = str;
 655
 656         while ((destp = strchr(destp, quote_chr))) {
 657                 if ((srcp = strchr(destp + 1, quote_chr))) {
 658                         srcp++;
 659                         while (isspace(*srcp)) srcp++;
 660                         memmove(destp, srcp, strlen(srcp) + 1);
 661                 } else {
 662                         *destp = '\0';
 663                         break;
 664                 }
 665         }
 666 }
 667
 668 void extract_quote(gchar *str, gchar quote_chr)
 669 {
 670         register gchar *p;
 671
 672         if ((str = strchr(str, quote_chr))) {
 673                 p = str;
 674                 while ((p = strchr(p + 1, quote_chr)) && (p[-1] == '\\')) {
 675                         memmove(p - 1, p, strlen(p) + 1);
 676                         p--;
 677                 }
 678                 if(p) {
 679                         *p = '\0';
 680                         memmove(str, str + 1, p - str);
 681                 }
 682         }
 683 }
 684
 685 void eliminate_address_comment(gchar *str)
 686 {
 687         register gchar *srcp, *destp;
 688         gint in_brace;
 689
 690         srcp = destp = str;
 691
 692         while ((destp = strchr(destp, '"'))) {
 693                 if ((srcp = strchr(destp + 1, '"'))) {
 694                         srcp++;
 695                         if (*srcp == '@') {
 696                                 destp = srcp + 1;
 697                         } else {
 698                                 while (isspace(*srcp)) srcp++;
 699                                 memmove(destp, srcp, strlen(srcp) + 1);
 700                         }
 701                 } else {
 702                         *destp = '\0';
 703                         break;
 704                 }
 705         }
 706
 707         srcp = destp = str;
 708
 709         while ((destp = strchr_with_skip_quote(destp, '"', '('))) {
 710                 in_brace = 1;
 711                 srcp = destp + 1;
 712                 while (*srcp) {
 713                         if (*srcp == '(')
 714                                 in_brace++;
 715                         else if (*srcp == ')')
 716                                 in_brace--;
 717                         srcp++;
 718                         if (in_brace == 0)
 719                                 break;
 720                 }
 721                 while (isspace(*srcp)) srcp++;
 722                 memmove(destp, srcp, strlen(srcp) + 1);
 723         }
 724 }
 725
 726 gchar *strchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
 727 {
 728         gboolean in_quote = FALSE;
 729
 730         while (*str) {
 731                 if (*str == c && !in_quote)
 732                         return (gchar *)str;
 733                 if (*str == quote_chr)
 734                         in_quote ^= TRUE;
 735                 str++;
 736         }
 737
 738         return NULL;
 739 }
 740
 741 gchar *strrchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
 742 {
 743         gboolean in_quote = FALSE;
 744         const gchar *p;
 745
 746         p = str + strlen(str) - 1;
 747         while (p >= str) {
 748                 if (*p == c && !in_quote)
 749                         return (gchar *)p;
 750                 if (*p == quote_chr)
 751                         in_quote ^= TRUE;
 752                 p--;
 753         }
 754
 755         return NULL;
 756 }
 757
 758 void extract_address(gchar *str)
 759 {
 760         eliminate_address_comment(str);
 761         if (strchr_with_skip_quote(str, '"', '<'))
 762                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 763         g_strstrip(str);
 764 }
 765
 766 GSList *address_list_append(GSList *addr_list, const gchar *str)
 767 {
 768         gchar *work;
 769         gchar *workp;
 770
 771         if (!str) return addr_list;
 772
 773         Xstrdup_a(work, str, return addr_list);
 774
 775         eliminate_address_comment(work);
 776         workp = work;
 777
 778         while (workp && *workp) {
 779                 gchar *p, *next;
 780
 781                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 782                         *p = '\0';
 783                         next = p + 1;
 784                 } else
 785                         next = NULL;
 786
 787                 if (strchr_with_skip_quote(workp, '"', '<'))
 788                         extract_parenthesis_with_skip_quote
 789                                 (workp, '"', '<', '>');
 790
 791                 g_strstrip(workp);
 792                 if (*workp)
 793                         addr_list = g_slist_append(addr_list, g_strdup(workp));
 794
 795                 workp = next;
 796         }
 797
 798         return addr_list;
 799 }
 800
 801 GSList *references_list_append(GSList *msgid_list, const gchar *str)
 802 {
 803         const gchar *strp;
 804
 805         if (!str) return msgid_list;
 806         strp = str;
 807
 808         while (strp && *strp) {
 809                 const gchar *start, *end;
 810                 gchar *msgid;
 811
 812                 if ((start = strchr(strp, '<')) != NULL) {
 813                         end = strchr(start + 1, '>');
 814                         if (!end) break;
 815                 } else
 816                         break;
 817
 818                 msgid = g_strndup(start + 1, end - start - 1);
 819                 g_strstrip(msgid);
 820                 if (*msgid)
 821                         msgid_list = g_slist_append(msgid_list, msgid);
 822                 else
 823                         g_free(msgid);
 824
 825                 strp = end + 1;
 826         }
 827
 828         return msgid_list;
 829 }
 830
 831 GSList *newsgroup_list_append(GSList *group_list, const gchar *str)
 832 {
 833         gchar *work;
 834         gchar *workp;
 835
 836         if (!str) return group_list;
 837
 838         Xstrdup_a(work, str, return group_list);
 839
 840         workp = work;
 841
 842         while (workp && *workp) {
 843                 gchar *p, *next;
 844
 845                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 846                         *p = '\0';
 847                         next = p + 1;
 848                 } else
 849                         next = NULL;
 850
 851                 g_strstrip(workp);
 852                 if (*workp)
 853                         group_list = g_slist_append(group_list,
 854                                                     g_strdup(workp));
 855
 856                 workp = next;
 857         }
 858
 859         return group_list;
 860 }
 861
 862 GList *add_history(GList *list, const gchar *str)
 863 {
 864         GList *old;
 865
 866         g_return_val_if_fail(str != NULL, list);
 867
 868         old = g_list_find_custom(list, (gpointer)str, (GCompareFunc)strcmp2);
 869         if (old) {
 870                 g_free(old->data);
 871                 list = g_list_remove(list, old->data);
 872         } else if (g_list_length(list) >= MAX_HISTORY_SIZE) {
 873                 GList *last;
 874
 875                 last = g_list_last(list);
 876                 if (last) {
 877                         g_free(last->data);
 878                         g_list_remove(list, last->data);
 879                 }
 880         }
 881
 882         list = g_list_prepend(list, g_strdup(str));
 883
 884         return list;
 885 }
 886
 887 void remove_return(gchar *str)
 888 {
 889         register gchar *p = str;
 890
 891         while (*p) {
 892                 if (*p == '\n' || *p == '\r')
 893                         memmove(p, p + 1, strlen(p));
 894                 else
 895                         p++;
 896         }
 897 }
 898
 899 void remove_space(gchar *str)
 900 {
 901         register gchar *p = str;
 902         register gint spc;
 903
 904         while (*p) {
 905                 spc = 0;
 906                 while (isspace(*(p + spc)))
 907                         spc++;
 908                 if (spc)
 909                         memmove(p, p + spc, strlen(p + spc) + 1);
 910                 else
 911                         p++;
 912         }
 913 }
 914
 915 void unfold_line(gchar *str)
 916 {
 917         register gchar *p = str;
 918         register gint spc;
 919
 920         while (*p) {
 921                 if (*p == '\n' || *p == '\r') {
 922                         *p++ = ' ';
 923                         spc = 0;
 924                         while (isspace(*(p + spc)))
 925                                 spc++;
 926                         if (spc)
 927                                 memmove(p, p + spc, strlen(p + spc) + 1);
 928                 } else
 929                         p++;
 930         }
 931 }
 932
 933 void subst_char(gchar *str, gchar orig, gchar subst)
 934 {
 935         register gchar *p = str;
 936
 937         while (*p) {
 938                 if (*p == orig)
 939                         *p = subst;
 940                 p++;
 941         }
 942 }
 943
 944 void subst_chars(gchar *str, gchar *orig, gchar subst)
 945 {
 946         register gchar *p = str;
 947
 948         while (*p) {
 949                 if (strchr(orig, *p) != NULL)
 950                         *p = subst;
 951                 p++;
 952         }
 953 }
 954
 955 void subst_for_filename(gchar *str)
 956 {
 957         subst_chars(str, " \t\r\n\"/\\", '_');
 958 }
 959
 960 gboolean is_header_line(const gchar *str)
 961 {
 962         if (str[0] == ':') return FALSE;
 963
 964         while (*str != '\0' && *str != ' ') {
 965                 if (*str == ':')
 966                         return TRUE;
 967                 str++;
 968         }
 969
 970         return FALSE;
 971 }
 972
 973 gboolean is_ascii_str(const guchar *str)
 974 {
 975         while (*str != '\0') {
 976                 if (*str != '\t' && *str != ' ' &&
 977                     *str != '\r' && *str != '\n' &&
 978                     (*str < 32 || *str >= 127))
 979                         return FALSE;
 980                 str++;
 981         }
 982
 983         return TRUE;
 984 }
 985
 986 gint get_quote_level(const gchar *str, const gchar *quote_chars)
 987 {
 988         const gchar *first_pos;
 989         const gchar *last_pos;
 990         const gchar *p = str;
 991         gint quote_level = -1;
 992
 993         /* speed up line processing by only searching to the last '>' */
 994         if ((first_pos = line_has_quote_char(str, quote_chars)) != NULL) {
 995                 /* skip a line if it contains a '<' before the initial '>' */
 996                 if (memchr(str, '<', first_pos - str) != NULL)
 997                         return -1;
 998                 last_pos = line_has_quote_char_last(first_pos, quote_chars);
 999         } else
1000                 return -1;
1001
1002         while (p <= last_pos) {
1003                 while (p < last_pos) {
1004                         if (isspace(*p))
1005                                 p++;
1006                         else
1007                                 break;
1008                 }
1009
1010                 if (strchr(quote_chars, *p))
1011                         quote_level++;
1012                 else if (*p != '-' && !isspace(*p) && p <= last_pos) {
1013                         /* any characters are allowed except '-' and space */
1014                         while (*p != '-'
1015                                && !strchr(quote_chars, *p)
1016                                && !isspace(*p)
1017                                && p < last_pos)
1018                                 p++;
1019                         if (strchr(quote_chars, *p))
1020                                 quote_level++;
1021                         else
1022                                 break;
1023                 }
1024
1025                 p++;
1026         }
1027
1028         return quote_level;
1029 }
1030
1031 const gchar * line_has_quote_char(const gchar * str, const gchar *quote_chars)
1032 {
1033         gchar * position = NULL;
1034         gchar * tmp_pos = NULL;
1035         int i;
1036
1037         if (quote_chars == NULL)
1038                 return FALSE;
1039
1040         for (i = 0; i < strlen(quote_chars); i++) {
1041                 tmp_pos = strchr (str,  quote_chars[i]);
1042                 if(position == NULL
1043                    || (tmp_pos != NULL && position >= tmp_pos) )
1044                         position = tmp_pos;
1045         }
1046         return position;
1047 }
1048
1049 const gchar * line_has_quote_char_last(const gchar * str, const gchar *quote_chars)
1050 {
1051         gchar * position = NULL;
1052         gchar * tmp_pos = NULL;
1053         int i;
1054
1055         if (quote_chars == NULL)
1056                 return FALSE;
1057
1058         for (i = 0; i < strlen(quote_chars); i++) {
1059                 tmp_pos = strrchr (str, quote_chars[i]);
1060                 if(position == NULL
1061                    || (tmp_pos != NULL && position <= tmp_pos) )
1062                         position = tmp_pos;
1063         }
1064         return position;
1065 }
1066
1067 gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
1068 {
1069         register guint haystack_len, needle_len;
1070         gboolean in_squote = FALSE, in_dquote = FALSE;
1071
1072         haystack_len = strlen(haystack);
1073         needle_len   = strlen(needle);
1074
1075         if (haystack_len < needle_len || needle_len == 0)
1076                 return NULL;
1077
1078         while (haystack_len >= needle_len) {
1079                 if (!in_squote && !in_dquote &&
1080                     !strncmp(haystack, needle, needle_len))
1081                         return (gchar *)haystack;
1082
1083                 /* 'foo"bar"' -> foo"bar"
1084                    "foo'bar'" -> foo'bar' */
1085                 if (*haystack == '\'') {
1086                         if (in_squote)
1087                                 in_squote = FALSE;
1088                         else if (!in_dquote)
1089                                 in_squote = TRUE;
1090                 } else if (*haystack == '\"') {
1091                         if (in_dquote)
1092                                 in_dquote = FALSE;
1093                         else if (!in_squote)
1094                                 in_dquote = TRUE;
1095                 }
1096
1097                 haystack++;
1098                 haystack_len--;
1099         }
1100
1101         return NULL;
1102 }
1103
1104 gchar *strchr_parenthesis_close(const gchar *str, gchar op, gchar cl)
1105 {
1106         const gchar *p;
1107         gchar quote_chr = '"';
1108         gint in_brace;
1109         gboolean in_quote = FALSE;
1110
1111         p = str;
1112
1113         if ((p = strchr_with_skip_quote(p, quote_chr, op))) {
1114                 p++;
1115                 in_brace = 1;
1116                 while (*p) {
1117                         if (*p == op && !in_quote)
1118                                 in_brace++;
1119                         else if (*p == cl && !in_quote)
1120                                 in_brace--;
1121                         else if (*p == quote_chr)
1122                                 in_quote ^= TRUE;
1123
1124                         if (in_brace == 0)
1125                                 return (gchar *)p;
1126
1127                         p++;
1128                 }
1129         }
1130
1131         return NULL;
1132 }
1133
1134 gchar **strsplit_parenthesis(const gchar *str, gchar op, gchar cl,
1135                              gint max_tokens)
1136 {
1137         GSList *string_list = NULL, *slist;
1138         gchar **str_array;
1139         const gchar *s_op, *s_cl;
1140         guint i, n = 1;
1141
1142         g_return_val_if_fail(str != NULL, NULL);
1143
1144         if (max_tokens < 1)
1145                 max_tokens = G_MAXINT;
1146
1147         s_op = strchr_with_skip_quote(str, '"', op);
1148         if (!s_op) return NULL;
1149         str = s_op;
1150         s_cl = strchr_parenthesis_close(str, op, cl);
1151         if (s_cl) {
1152                 do {
1153                         guint len;
1154                         gchar *new_string;
1155
1156                         str++;
1157                         len = s_cl - str;
1158                         new_string = g_new(gchar, len + 1);
1159                         strncpy(new_string, str, len);
1160                         new_string[len] = 0;
1161                         string_list = g_slist_prepend(string_list, new_string);
1162                         n++;
1163                         str = s_cl + 1;
1164
1165                         while (*str && isspace(*str)) str++;
1166                         if (*str != op) {
1167                                 string_list = g_slist_prepend(string_list,
1168                                                               g_strdup(""));
1169                                 n++;
1170                                 s_op = strchr_with_skip_quote(str, '"', op);
1171                                 if (!--max_tokens || !s_op) break;
1172                                 str = s_op;
1173                         } else
1174                                 s_op = str;
1175                         s_cl = strchr_parenthesis_close(str, op, cl);
1176                 } while (--max_tokens && s_cl);
1177         }
1178
1179         str_array = g_new(gchar*, n);
1180
1181         i = n - 1;
1182
1183         str_array[i--] = NULL;
1184         for (slist = string_list; slist; slist = slist->next)
1185                 str_array[i--] = slist->data;
1186
1187         g_slist_free(string_list);
1188
1189         return str_array;
1190 }
1191
1192 gchar **strsplit_with_quote(const gchar *str, const gchar *delim,
1193                             gint max_tokens)
1194 {
1195         GSList *string_list = NULL, *slist;
1196         gchar **str_array, *s, *new_str;
1197         guint i, n = 1, len;
1198
1199         g_return_val_if_fail(str != NULL, NULL);
1200         g_return_val_if_fail(delim != NULL, NULL);
1201
1202         if (max_tokens < 1)
1203                 max_tokens = G_MAXINT;
1204
1205         s = strstr_with_skip_quote(str, delim);
1206         if (s) {
1207                 guint delimiter_len = strlen(delim);
1208
1209                 do {
1210                         len = s - str;
1211                         new_str = g_strndup(str, len);
1212
1213                         if (new_str[0] == '\'' || new_str[0] == '\"') {
1214                                 if (new_str[len - 1] == new_str[0]) {
1215                                         new_str[len - 1] = '\0';
1216                                         memmove(new_str, new_str + 1, len - 1);
1217                                 }
1218                         }
1219                         string_list = g_slist_prepend(string_list, new_str);
1220                         n++;
1221                         str = s + delimiter_len;
1222                         s = strstr_with_skip_quote(str, delim);
1223                 } while (--max_tokens && s);
1224         }
1225
1226         if (*str) {
1227                 new_str = g_strdup(str);
1228                 if (new_str[0] == '\'' || new_str[0] == '\"') {
1229                         len = strlen(str);
1230                         if (new_str[len - 1] == new_str[0]) {
1231                                 new_str[len - 1] = '\0';
1232                                 memmove(new_str, new_str + 1, len - 1);
1233                         }
1234                 }
1235                 string_list = g_slist_prepend(string_list, new_str);
1236                 n++;
1237         }
1238
1239         str_array = g_new(gchar*, n);
1240
1241         i = n - 1;
1242
1243         str_array[i--] = NULL;
1244         for (slist = string_list; slist; slist = slist->next)
1245                 str_array[i--] = slist->data;
1246
1247         g_slist_free(string_list);
1248
1249         return str_array;
1250 }
1251
1252 gchar *get_abbrev_newsgroup_name(const gchar *group)
1253 {
1254         gchar *abbrev_group;
1255         gchar *ap;
1256         const gchar *p = group;
1257
1258         abbrev_group = ap = g_malloc(strlen(group) + 1);
1259
1260         while (*p) {
1261                 while (*p == '.')
1262                         *ap++ = *p++;
1263                 if (strchr(p, '.')) {
1264                         *ap++ = *p++;
1265                         while (*p != '.') p++;
1266                 } else {
1267                         strcpy(ap, p);
1268                         return abbrev_group;
1269                 }
1270         }
1271
1272         *ap = '\0';
1273         return abbrev_group;
1274 }
1275
1276 gchar *trim_string(const gchar *str, gint len)
1277 {
1278         const gchar *p = str;
1279         gint mb_len;
1280         gchar *new_str;
1281         gint new_len = 0;
1282
1283         if (!str) return NULL;
1284         if (strlen(str) <= len)
1285                 return g_strdup(str);
1286
1287         while (*p != '\0') {
1288                 mb_len = mblen(p, MB_LEN_MAX);
1289                 if (mb_len == 0)
1290                         break;
1291                 else if (mb_len < 0)
1292                         return g_strdup(str);
1293                 else if (new_len + mb_len > len)
1294                         break;
1295                 else
1296                         new_len += mb_len;
1297                 p += mb_len;
1298         }
1299
1300         Xstrndup_a(new_str, str, new_len, return g_strdup(str));
1301         return g_strconcat(new_str, "...", NULL);
1302 }
1303
1304 GList *uri_list_extract_filenames(const gchar *uri_list)
1305 {
1306         GList *result = NULL;
1307         const gchar *p, *q;
1308         gchar *file;
1309
1310         p = uri_list;
1311
1312         while (p) {
1313                 if (*p != '#') {
1314                         while (isspace(*p)) p++;
1315                         if (!strncmp(p, "file:", 5)) {
1316                                 p += 5;
1317                                 q = p;
1318                                 while (*q && *q != '\n' && *q != '\r') q++;
1319
1320                                 if (q > p) {
1321                                         q--;
1322                                         while (q > p && isspace(*q)) q--;
1323                                         file = g_malloc(q - p + 2);
1324                                         strncpy(file, p, q - p + 1);
1325                                         file[q - p + 1] = '\0';
1326                                         result = g_list_append(result,file);
1327                                 }
1328                         }
1329                 }
1330                 p = strchr(p, '\n');
1331                 if (p) p++;
1332         }
1333
1334         return result;
1335 }
1336
1337 #define HEX_TO_INT(val, hex) \
1338 { \
1339         gchar c = hex; \
1340  \
1341         if ('0' <= c && c <= '9') { \
1342                 val = c - '0'; \
1343         } else if ('a' <= c && c <= 'f') { \
1344                 val = c - 'a' + 10; \
1345         } else if ('A' <= c && c <= 'F') { \
1346                 val = c - 'A' + 10; \
1347         } else { \
1348                 val = 0; \
1349         } \
1350 }
1351
1352 /*
1353  * We need this wrapper around g_get_home_dir(), so that
1354  * we can fix some Windoze things here.  Should be done in glibc of course
1355  * but as long as we are not able to do our own extensions to glibc, we do
1356  * it here.
1357  */
1358 gchar *get_home_dir(void)
1359 {
1360 #if HAVE_DOSISH_SYSTEM
1361     static gchar *home_dir;
1362
1363     if (!home_dir) {
1364         home_dir = read_w32_registry_string(NULL,
1365                                             "Software\\Sylpheed", "HomeDir" );
1366         if (!home_dir || !*home_dir) {
1367             if (getenv ("HOMEDRIVE") && getenv("HOMEPATH")) {
1368                 const char *s = g_get_home_dir();
1369                 if (s && *s)
1370                     home_dir = g_strdup (s);
1371             }
1372             if (!home_dir || !*home_dir)
1373                 home_dir = g_strdup ("c:\\sylpheed");
1374         }
1375         debug_print("initialized home_dir to `%s'\n", home_dir);
1376     }
1377     return home_dir;
1378 #else /* standard glib */
1379     return g_get_home_dir();
1380 #endif
1381 }
1382
1383 gchar *get_rc_dir(void)
1384 {
1385         static gchar *rc_dir = NULL;
1386
1387         if (!rc_dir)
1388                 rc_dir = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1389                                      RC_DIR, NULL);
1390
1391         return rc_dir;
1392 }
1393
1394 gchar *get_news_cache_dir(void)
1395 {
1396         static gchar *news_cache_dir = NULL;
1397
1398         if (!news_cache_dir)
1399                 news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1400                                              NEWS_CACHE_DIR, NULL);
1401
1402         return news_cache_dir;
1403 }
1404
1405 gchar *get_imap_cache_dir(void)
1406 {
1407         static gchar *imap_cache_dir = NULL;
1408
1409         if (!imap_cache_dir)
1410                 imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1411                                              IMAP_CACHE_DIR, NULL);
1412
1413         return imap_cache_dir;
1414 }
1415
1416 gchar *get_mbox_cache_dir(void)
1417 {
1418         static gchar *mbox_cache_dir = NULL;
1419
1420         if (!mbox_cache_dir)
1421                 mbox_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1422                                              MBOX_CACHE_DIR, NULL);
1423
1424         return mbox_cache_dir;
1425 }
1426
1427 gchar *get_mime_tmp_dir(void)
1428 {
1429         static gchar *mime_tmp_dir = NULL;
1430
1431         if (!mime_tmp_dir)
1432                 mime_tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1433                                            MIME_TMP_DIR, NULL);
1434
1435         return mime_tmp_dir;
1436 }
1437
1438 gchar *get_template_dir(void)
1439 {
1440         static gchar *template_dir = NULL;
1441
1442         if (!template_dir)
1443                 template_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1444                                            TEMPLATE_DIR, NULL);
1445
1446         return template_dir;
1447 }
1448
1449 gchar *get_header_cache_dir(void)
1450 {
1451         static gchar *header_dir = NULL;
1452
1453         if (!header_dir)
1454                 header_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1455                                          HEADER_CACHE_DIR, NULL);
1456
1457         return header_dir;
1458 }
1459
1460 gchar *get_tmp_file(void)
1461 {
1462         static gchar *tmp_file = NULL;
1463
1464         if (!tmp_file)
1465                 tmp_file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1466                                        "tmpfile", NULL);
1467
1468         return tmp_file;
1469 }
1470
1471 gchar *get_domain_name(void)
1472 {
1473         static gchar *domain_name = NULL;
1474         struct hostent *myfqdn = NULL;
1475
1476         if (!domain_name) {
1477                 gchar buf[BUFFSIZE] = "";
1478
1479                 if (gethostname(buf, sizeof(buf)) < 0) {
1480                         perror("gethostname");
1481                         strcpy(buf, "unknown");
1482                 }  else  {
1483                 myfqdn = gethostbyname(buf);
1484                 if (myfqdn != NULL)  {
1485                   memset(buf, '\0', strlen(buf));
1486                   strcpy(buf, myfqdn->h_name);
1487                   }  else  {
1488                   perror("gethostbyname");
1489                   strcpy(buf, "unknown");
1490                   }
1491                 }
1492
1493                 domain_name = g_strdup(buf);
1494         }
1495
1496         return domain_name;
1497 }
1498
1499 off_t get_file_size(const gchar *file)
1500 {
1501         struct stat s;
1502
1503         if (stat(file, &s) < 0) {
1504                 FILE_OP_ERROR(file, "stat");
1505                 return -1;
1506         }
1507
1508         return s.st_size;
1509 }
1510
1511 off_t get_file_size_as_crlf(const gchar *file)
1512 {
1513         FILE *fp;
1514         off_t size = 0;
1515         gchar buf[BUFFSIZE];
1516
1517         if ((fp = fopen(file, "rb")) == NULL) {
1518                 FILE_OP_ERROR(file, "fopen");
1519                 return -1;
1520         }
1521
1522         while (fgets(buf, sizeof(buf), fp) != NULL) {
1523                 strretchomp(buf);
1524                 size += strlen(buf) + 2;
1525         }
1526
1527         if (ferror(fp)) {
1528                 FILE_OP_ERROR(file, "fgets");
1529                 size = -1;
1530         }
1531
1532         fclose(fp);
1533
1534         return size;
1535 }
1536
1537 off_t get_left_file_size(FILE *fp)
1538 {
1539         glong pos;
1540         glong end;
1541         off_t size;
1542
1543         if ((pos = ftell(fp)) < 0) {
1544                 perror("ftell");
1545                 return -1;
1546         }
1547         if (fseek(fp, 0L, SEEK_END) < 0) {
1548                 perror("fseek");
1549                 return -1;
1550         }
1551         if ((end = ftell(fp)) < 0) {
1552                 perror("fseek");
1553                 return -1;
1554         }
1555         size = end - pos;
1556         if (fseek(fp, pos, SEEK_SET) < 0) {
1557                 perror("fseek");
1558                 return -1;
1559         }
1560
1561         return size;
1562 }
1563
1564 gboolean file_exist(const gchar *file, gboolean allow_fifo)
1565 {
1566         struct stat s;
1567
1568         if (stat(file, &s) < 0) {
1569                 if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
1570                 return FALSE;
1571         }
1572
1573         if (S_ISREG(s.st_mode) || (allow_fifo && S_ISFIFO(s.st_mode)))
1574                 return TRUE;
1575
1576         return FALSE;
1577 }
1578
1579 gboolean is_dir_exist(const gchar *dir)
1580 {
1581         struct stat s;
1582
1583         if (stat(dir, &s) < 0) {
1584                 if (ENOENT != errno) FILE_OP_ERROR(dir, "stat");
1585                 return FALSE;
1586         }
1587
1588         if (S_ISDIR(s.st_mode))
1589                 return TRUE;
1590
1591         return FALSE;
1592 }
1593
1594 gboolean is_file_entry_exist(const gchar *file)
1595 {
1596         struct stat s;
1597
1598         if (stat(file, &s) < 0) {
1599                 if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
1600                 return FALSE;
1601         }
1602
1603         return TRUE;
1604 }
1605
1606 gint change_dir(const gchar *dir)
1607 {
1608         gchar *prevdir = NULL;
1609
1610         if (debug_mode)
1611                 prevdir = g_get_current_dir();
1612
1613         if (chdir(dir) < 0) {
1614                 FILE_OP_ERROR(dir, "chdir");
1615                 if (debug_mode) g_free(prevdir);
1616                 return -1;
1617         } else if (debug_mode) {
1618                 gchar *cwd;
1619
1620                 cwd = g_get_current_dir();
1621                 if (strcmp(prevdir, cwd) != 0)
1622                         g_print("current dir: %s\n", cwd);
1623                 g_free(cwd);
1624                 g_free(prevdir);
1625         }
1626
1627         return 0;
1628 }
1629
1630 gint make_dir(const gchar *dir)
1631 {
1632         if (mkdir(dir, S_IRWXU) < 0) {
1633                 FILE_OP_ERROR(dir, "mkdir");
1634                 return -1;
1635         }
1636         if (chmod(dir, S_IRWXU) < 0)
1637                 FILE_OP_ERROR(dir, "chmod");
1638
1639         return 0;
1640 }
1641
1642 gint make_dir_hier(const gchar *dir)
1643 {
1644         gchar *parent_dir;
1645         const gchar *p;
1646
1647         for (p = dir; (p = strchr(p, G_DIR_SEPARATOR)) != NULL; p++) {
1648                 parent_dir = g_strndup(dir, p - dir);
1649                 if (*parent_dir != '\0') {
1650                         if (!is_dir_exist(parent_dir)) {
1651                                 if (make_dir(parent_dir) < 0) {
1652                                         g_free(parent_dir);
1653                                         return -1;
1654                                 }
1655                         }
1656                 }
1657                 g_free(parent_dir);
1658         }
1659
1660         if (!is_dir_exist(dir)) {
1661                 if (make_dir(dir) < 0)
1662                         return -1;
1663         }
1664
1665         return 0;
1666 }
1667
1668 gint remove_all_files(const gchar *dir)
1669 {
1670         DIR *dp;
1671         struct dirent *d;
1672         gchar *prev_dir;
1673
1674         prev_dir = g_get_current_dir();
1675
1676         if (chdir(dir) < 0) {
1677                 FILE_OP_ERROR(dir, "chdir");
1678                 return -1;
1679         }
1680
1681         if ((dp = opendir(".")) == NULL) {
1682                 FILE_OP_ERROR(dir, "opendir");
1683                 return -1;
1684         }
1685
1686         while ((d = readdir(dp)) != NULL) {
1687                 if (!strcmp(d->d_name, ".") ||
1688                     !strcmp(d->d_name, ".."))
1689                         continue;
1690
1691                 if (unlink(d->d_name) < 0)
1692                         FILE_OP_ERROR(d->d_name, "unlink");
1693         }
1694
1695         closedir(dp);
1696
1697         if (chdir(prev_dir) < 0) {
1698                 FILE_OP_ERROR(prev_dir, "chdir");
1699                 g_free(prev_dir);
1700                 return -1;
1701         }
1702
1703         g_free(prev_dir);
1704
1705         return 0;
1706 }
1707
1708 gint remove_numbered_files(const gchar *dir, guint first, guint last)
1709 {
1710         DIR *dp;
1711         struct dirent *d;
1712         gchar *prev_dir;
1713         gint fileno;
1714
1715         prev_dir = g_get_current_dir();
1716
1717         if (chdir(dir) < 0) {
1718                 FILE_OP_ERROR(dir, "chdir");
1719                 return -1;
1720         }
1721
1722         if ((dp = opendir(".")) == NULL) {
1723                 FILE_OP_ERROR(dir, "opendir");
1724                 return -1;
1725         }
1726
1727         while ((d = readdir(dp)) != NULL) {
1728                 fileno = to_number(d->d_name);
1729                 if (fileno >= 0 && first <= fileno && fileno <= last) {
1730                         if (unlink(d->d_name) < 0)
1731                                 FILE_OP_ERROR(d->d_name, "unlink");
1732                 }
1733         }
1734
1735         closedir(dp);
1736
1737         if (chdir(prev_dir) < 0) {
1738                 FILE_OP_ERROR(prev_dir, "chdir");
1739                 g_free(prev_dir);
1740                 return -1;
1741         }
1742
1743         g_free(prev_dir);
1744
1745         return 0;
1746 }
1747
1748 gint remove_all_numbered_files(const gchar *dir)
1749 {
1750         return remove_numbered_files(dir, 0, UINT_MAX);
1751 }
1752
1753 gint remove_dir_recursive(const gchar *dir)
1754 {
1755         struct stat s;
1756         DIR *dp;
1757         struct dirent *d;
1758         gchar *prev_dir;
1759
1760         /* g_print("dir = %s\n", dir); */
1761
1762         if (stat(dir, &s) < 0) {
1763                 FILE_OP_ERROR(dir, "stat");
1764                 if (ENOENT == errno) return 0;
1765                 return -1;
1766         }
1767
1768         if (!S_ISDIR(s.st_mode)) {
1769                 if (unlink(dir) < 0) {
1770                         FILE_OP_ERROR(dir, "unlink");
1771                         return -1;
1772                 }
1773
1774                 return 0;
1775         }
1776
1777         prev_dir = g_get_current_dir();
1778         /* g_print("prev_dir = %s\n", prev_dir); */
1779
1780         if (!path_cmp(prev_dir, dir)) {
1781                 g_free(prev_dir);
1782                 if (chdir("..") < 0) {
1783                         FILE_OP_ERROR(dir, "chdir");
1784                         return -1;
1785                 }
1786                 prev_dir = g_get_current_dir();
1787         }
1788
1789         if (chdir(dir) < 0) {
1790                 FILE_OP_ERROR(dir, "chdir");
1791                 g_free(prev_dir);
1792                 return -1;
1793         }
1794
1795         if ((dp = opendir(".")) == NULL) {
1796                 FILE_OP_ERROR(dir, "opendir");
1797                 chdir(prev_dir);
1798                 g_free(prev_dir);
1799                 return -1;
1800         }
1801
1802         /* remove all files in the directory */
1803         while ((d = readdir(dp)) != NULL) {
1804                 if (!strcmp(d->d_name, ".") ||
1805                     !strcmp(d->d_name, ".."))
1806                         continue;
1807
1808                 if (stat(d->d_name, &s) < 0) {
1809                         FILE_OP_ERROR(d->d_name, "stat");
1810                         continue;
1811                 }
1812
1813                 /* g_print("removing %s\n", d->d_name); */
1814
1815                 if (S_ISDIR(s.st_mode)) {
1816                         if (remove_dir_recursive(d->d_name) < 0) {
1817                                 g_warning("can't remove directory\n");
1818                                 return -1;
1819                         }
1820                 } else {
1821                         if (unlink(d->d_name) < 0)
1822                                 FILE_OP_ERROR(d->d_name, "unlink");
1823                 }
1824         }
1825
1826         closedir(dp);
1827
1828         if (chdir(prev_dir) < 0) {
1829                 FILE_OP_ERROR(prev_dir, "chdir");
1830                 g_free(prev_dir);
1831                 return -1;
1832         }
1833
1834         g_free(prev_dir);
1835
1836         if (rmdir(dir) < 0) {
1837                 FILE_OP_ERROR(dir, "rmdir");
1838                 return -1;
1839         }
1840
1841         return 0;
1842 }
1843
1844 #if 0
1845 /* this seems to be slower than the stdio version... */
1846 gint copy_file(const gchar *src, const gchar *dest)
1847 {
1848         gint src_fd, dest_fd;
1849         gint n_read;
1850         gint n_write;
1851         gchar buf[BUFSIZ];
1852         gchar *dest_bak = NULL;
1853
1854         if ((src_fd = open(src, O_RDONLY)) < 0) {
1855                 FILE_OP_ERROR(src, "open");
1856                 return -1;
1857         }
1858
1859         if (is_file_exist(dest)) {
1860                 dest_bak = g_strconcat(dest, ".bak", NULL);
1861                 if (rename(dest, dest_bak) < 0) {
1862                         FILE_OP_ERROR(dest, "rename");
1863                         close(src_fd);
1864                         g_free(dest_bak);
1865                         return -1;
1866                 }
1867         }
1868
1869         if ((dest_fd = open(dest, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) < 0) {
1870                 FILE_OP_ERROR(dest, "open");
1871                 close(src_fd);
1872                 if (dest_bak) {
1873                         if (rename(dest_bak, dest) < 0)
1874                                 FILE_OP_ERROR(dest_bak, "rename");
1875                         g_free(dest_bak);
1876                 }
1877                 return -1;
1878         }
1879
1880         while ((n_read = read(src_fd, buf, sizeof(buf))) > 0) {
1881                 gint len = n_read;
1882                 gchar *bufp = buf;
1883
1884                 while (len > 0) {
1885                         n_write = write(dest_fd, bufp, len);
1886                         if (n_write <= 0) {
1887                                 g_warning(_("writing to %s failed.\n"), dest);
1888                                 close(dest_fd);
1889                                 close(src_fd);
1890                                 unlink(dest);
1891                                 if (dest_bak) {
1892                                         if (rename(dest_bak, dest) < 0)
1893                                                 FILE_OP_ERROR(dest_bak, "rename");
1894                                         g_free(dest_bak);
1895                                 }
1896                                 return -1;
1897                         }
1898                         len -= n_write;
1899                         bufp += n_write;
1900                 }
1901         }
1902
1903         close(src_fd);
1904         close(dest_fd);
1905
1906         if (n_read < 0 || get_file_size(src) != get_file_size(dest)) {
1907                 g_warning(_("File copy from %s to %s failed.\n"), src, dest);
1908                 unlink(dest);
1909                 if (dest_bak) {
1910                         if (rename(dest_bak, dest) < 0)
1911                                 FILE_OP_ERROR(dest_bak, "rename");
1912                         g_free(dest_bak);
1913                 }
1914                 return -1;
1915         }
1916         g_free(dest_bak);
1917
1918         return 0;
1919 }
1920 #endif
1921
1922 gint copy_file(const gchar *src, const gchar *dest)
1923 {
1924         FILE *src_fp, *dest_fp;
1925         gint n_read;
1926         gchar buf[BUFSIZ];
1927         gchar *dest_bak = NULL;
1928         gboolean err = FALSE;
1929
1930         if ((src_fp = fopen(src, "rb")) == NULL) {
1931                 FILE_OP_ERROR(src, "fopen");
1932                 return -1;
1933         }
1934         if (is_file_exist(dest)) {
1935                 dest_bak = g_strconcat(dest, ".bak", NULL);
1936                 if (rename(dest, dest_bak) < 0) {
1937                         FILE_OP_ERROR(dest, "rename");
1938                         fclose(src_fp);
1939                         g_free(dest_bak);
1940                         return -1;
1941                 }
1942         }
1943
1944         if ((dest_fp = fopen(dest, "wb")) == NULL) {
1945                 FILE_OP_ERROR(dest, "fopen");
1946                 fclose(src_fp);
1947                 if (dest_bak) {
1948                         if (rename(dest_bak, dest) < 0)
1949                                 FILE_OP_ERROR(dest_bak, "rename");
1950                         g_free(dest_bak);
1951                 }
1952                 return -1;
1953         }
1954
1955         if (change_file_mode_rw(dest_fp, dest) < 0) {
1956                 FILE_OP_ERROR(dest, "chmod");
1957                 g_warning(_("can't change file mode\n"));
1958         }
1959
1960         while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), src_fp)) > 0) {
1961                 if (n_read < sizeof(buf) && ferror(src_fp))
1962                         break;
1963                 if (fwrite(buf, n_read, 1, dest_fp) < 1) {
1964                         g_warning(_("writing to %s failed.\n"), dest);
1965                         fclose(dest_fp);
1966                         fclose(src_fp);
1967                         unlink(dest);
1968                         if (dest_bak) {
1969                                 if (rename(dest_bak, dest) < 0)
1970                                         FILE_OP_ERROR(dest_bak, "rename");
1971                                 g_free(dest_bak);
1972                         }
1973                         return -1;
1974                 }
1975         }
1976
1977         if (ferror(src_fp)) {
1978                 FILE_OP_ERROR(src, "fread");
1979                 err = TRUE;
1980         }
1981         fclose(src_fp);
1982         if (fclose(dest_fp) == EOF) {
1983                 FILE_OP_ERROR(dest, "fclose");
1984                 err = TRUE;
1985         }
1986
1987         if (err) {
1988                 unlink(dest);
1989                 if (dest_bak) {
1990                         if (rename(dest_bak, dest) < 0)
1991                                 FILE_OP_ERROR(dest_bak, "rename");
1992                         g_free(dest_bak);
1993                 }
1994                 return -1;
1995         }
1996
1997         g_free(dest_bak);
1998
1999         return 0;
2000 }
2001
2002 gint move_file(const gchar *src, const gchar *dest)
2003 {
2004         if (is_file_exist(dest)) {
2005                 g_warning(_("move_file(): file %s already exists."), dest);
2006                 return -1;
2007         }
2008
2009         if (rename(src, dest) == 0) return 0;
2010
2011         if (EXDEV != errno) {
2012                 FILE_OP_ERROR(src, "rename");
2013                 return -1;
2014         }
2015
2016         if (copy_file(src, dest) < 0) return -1;
2017
2018         unlink(src);
2019
2020         return 0;
2021 }
2022
2023 gint change_file_mode_rw(FILE *fp, const gchar *file)
2024 {
2025 #if HAVE_FCHMOD
2026         return fchmod(fileno(fp), S_IRUSR|S_IWUSR);
2027 #else
2028         return chmod(file, S_IRUSR|S_IWUSR);
2029 #endif
2030 }
2031
2032 FILE *my_tmpfile(void)
2033 {
2034 #if HAVE_MKSTEMP
2035         const gchar suffix[] = ".XXXXXX";
2036         const gchar *tmpdir;
2037         guint tmplen;
2038         const gchar *progname;
2039         guint proglen;
2040         gchar *fname;
2041         gint fd;
2042         FILE *fp;
2043
2044         tmpdir = g_get_tmp_dir();
2045         tmplen = strlen(tmpdir);
2046         progname = g_get_prgname();
2047         proglen = strlen(progname);
2048         Xalloca(fname, tmplen + 1 + proglen + sizeof(suffix),
2049                 return tmpfile());
2050
2051         memcpy(fname, tmpdir, tmplen);
2052         fname[tmplen] = G_DIR_SEPARATOR;
2053         memcpy(fname + tmplen + 1, progname, proglen);
2054         memcpy(fname + tmplen + 1 + proglen, suffix, sizeof(suffix));
2055
2056         fd = mkstemp(fname);
2057         if (fd < 0)
2058                 return tmpfile();
2059
2060         unlink(fname);
2061
2062         fp = fdopen(fd, "w+b");
2063         if (!fp)
2064                 close(fd);
2065         else
2066                 return fp;
2067 #endif /* HAVE_MKSTEMP */
2068
2069         return tmpfile();
2070 }
2071
2072 FILE *str_open_as_stream(const gchar *str)
2073 {
2074         FILE *fp;
2075         size_t len;
2076
2077         g_return_val_if_fail(str != NULL, NULL);
2078
2079         fp = my_tmpfile();
2080         if (!fp) {
2081                 FILE_OP_ERROR("str_open_as_stream", "my_tmpfile");
2082                 return NULL;
2083         }
2084
2085         len = strlen(str);
2086         if (len == 0) return fp;
2087
2088         if (fwrite(str, len, 1, fp) != 1) {
2089                 FILE_OP_ERROR("str_open_as_stream", "fwrite");
2090                 fclose(fp);
2091                 return NULL;
2092         }
2093
2094         rewind(fp);
2095         return fp;
2096 }
2097
2098 gint execute_async(gchar *const argv[])
2099 {
2100         pid_t pid;
2101
2102         if ((pid = fork()) < 0) {
2103                 perror("fork");
2104                 return -1;
2105         }
2106
2107         if (pid == 0) {                 /* child process */
2108                 pid_t gch_pid;
2109
2110                 if ((gch_pid = fork()) < 0) {
2111                         perror("fork");
2112                         _exit(1);
2113                 }
2114
2115                 if (gch_pid == 0) {     /* grandchild process */
2116                         execvp(argv[0], argv);
2117
2118                         perror("execvp");
2119                         _exit(1);
2120                 }
2121
2122                 _exit(0);
2123         }
2124
2125         waitpid(pid, NULL, 0);
2126
2127         return 0;
2128 }
2129
2130 gint execute_sync(gchar *const argv[])
2131 {
2132         pid_t pid;
2133
2134         if ((pid = fork()) < 0) {
2135                 perror("fork");
2136                 return -1;
2137         }
2138
2139         if (pid == 0) {         /* child process */
2140                 execvp(argv[0], argv);
2141
2142                 perror("execvp");
2143                 _exit(1);
2144         }
2145
2146         waitpid(pid, NULL, 0);
2147
2148         return 0;
2149 }
2150
2151 gint execute_command_line(const gchar *cmdline, gboolean async)
2152 {
2153         gchar **argv;
2154         gint ret;
2155
2156         argv = strsplit_with_quote(cmdline, " ", 0);
2157
2158         if (async)
2159                 ret = execute_async(argv);
2160         else
2161                 ret = execute_sync(argv);
2162         g_strfreev(argv);
2163
2164         return ret;
2165 }
2166
2167 static gint is_unchanged_uri_char(char c)
2168 {
2169         switch (c) {
2170                 case '(':
2171                 case ')':
2172                 case ',':
2173                         return 0;
2174                 default:
2175                         return 1;
2176         }
2177 }
2178
2179 void encode_uri(gchar *encoded_uri, gint bufsize, const gchar *uri)
2180 {
2181         int i;
2182         int k;
2183
2184         k = 0;
2185         for(i = 0; i < strlen(uri) ; i++) {
2186                 if (is_unchanged_uri_char(uri[i])) {
2187                         if (k + 2 >= bufsize)
2188                                 break;
2189                         encoded_uri[k++] = uri[i];
2190                 }
2191                 else {
2192                         char * hexa = "0123456789ABCDEF";
2193
2194                         if (k + 4 >= bufsize)
2195                                 break;
2196                         encoded_uri[k++] = '%';
2197                         encoded_uri[k++] = hexa[uri[i] / 16];
2198                         encoded_uri[k++] = hexa[uri[i] % 16];
2199                 }
2200         }
2201         encoded_uri[k] = 0;
2202 }
2203
2204 /* Converts two-digit hexadecimal to decimal.  Used for unescaping escaped
2205  * characters
2206  */
2207 static gint axtoi(const gchar *hexstr)
2208 {
2209         gint hi, lo, result;
2210
2211         hi = hexstr[0];
2212         if ('0' <= hi && hi <= '9') {
2213                 hi -= '0';
2214         } else
2215                 if ('a' <= hi && hi <= 'f') {
2216                         hi -= ('a' - 10);
2217                 } else
2218                         if ('A' <= hi && hi <= 'F') {
2219                                 hi -= ('A' - 10);
2220                         }
2221
2222         lo = hexstr[1];
2223         if ('0' <= lo && lo <= '9') {
2224                 lo -= '0';
2225         } else
2226                 if ('a' <= lo && lo <= 'f') {
2227                         lo -= ('a'-10);
2228                 } else
2229                         if ('A' <= lo && lo <= 'F') {
2230                                 lo -= ('A' - 10);
2231                         }
2232         result = lo + (16 * hi);
2233         return result;
2234 }
2235
2236
2237 /* Decodes URL-Encoded strings (i.e. strings in which spaces are replaced by
2238  * plusses, and escape characters are used)
2239  */
2240
2241 void decode_uri(gchar *decoded_uri, const gchar *encoded_uri)
2242 {
2243         const gchar *encoded;
2244         gchar *decoded;
2245
2246         encoded = encoded_uri;
2247         decoded = decoded_uri;
2248
2249         while (*encoded) {
2250                 if (*encoded == '%') {
2251                         encoded++;
2252                         if (isxdigit(encoded[0])
2253                             && isxdigit(encoded[1])) {
2254                                 *decoded = (gchar) axtoi(encoded);
2255                                 decoded++;
2256                                 encoded += 2;
2257                         }
2258                 }
2259                 else if (*encoded == '+') {
2260                         *decoded = ' ';
2261                         decoded++;
2262                         encoded++;
2263                 }
2264                 else {
2265                         *decoded = *encoded;
2266                         decoded++;
2267                         encoded++;
2268                 }
2269         }
2270
2271         *decoded = '\0';
2272 }
2273
2274
2275 gint open_uri(const gchar *uri, const gchar *cmdline)
2276 {
2277         static gchar *default_cmdline = "netscape -remote openURL(%s,raise)";
2278         gchar buf[BUFFSIZE];
2279         gchar *p;
2280         gchar encoded_uri[BUFFSIZE];
2281
2282         g_return_val_if_fail(uri != NULL, -1);
2283
2284         /* an option to choose whether to use encode_uri or not ? */
2285         encode_uri(encoded_uri, BUFFSIZE, uri);
2286
2287         if (cmdline &&
2288             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2289             !strchr(p + 2, '%'))
2290                 g_snprintf(buf, sizeof(buf), cmdline, encoded_uri);
2291         else {
2292                 if (cmdline)
2293                         g_warning(_("Open URI command line is invalid: `%s'"),
2294                                   cmdline);
2295                 g_snprintf(buf, sizeof(buf), default_cmdline, encoded_uri);
2296         }
2297
2298         execute_command_line(buf, TRUE);
2299
2300         return 0;
2301 }
2302
2303 time_t remote_tzoffset_sec(const gchar *zone)
2304 {
2305         static gchar ustzstr[] = "PSTPDTMSTMDTCSTCDTESTEDT";
2306         gchar zone3[4];
2307         gchar *p;
2308         gchar c;
2309         gint iustz;
2310         gint offset;
2311         time_t remoteoffset;
2312
2313         strncpy(zone3, zone, 3);
2314         zone3[3] = '\0';
2315         remoteoffset = 0;
2316
2317         if (sscanf(zone, "%c%d", &c, &offset) == 2 &&
2318             (c == '+' || c == '-')) {
2319                 remoteoffset = ((offset / 100) * 60 + (offset % 100)) * 60;
2320                 if (c == '-')
2321                         remoteoffset = -remoteoffset;
2322         } else if (!strncmp(zone, "UT" , 2) ||
2323                    !strncmp(zone, "GMT", 2)) {
2324                 remoteoffset = 0;
2325         } else if (strlen(zone3) == 3 &&
2326                    (p = strstr(ustzstr, zone3)) != NULL &&
2327                    (p - ustzstr) % 3 == 0) {
2328                 iustz = ((gint)(p - ustzstr) / 3 + 1) / 2 - 8;
2329                 remoteoffset = iustz * 3600;
2330         } else if (strlen(zone3) == 1) {
2331                 switch (zone[0]) {
2332                 case 'Z': remoteoffset =   0; break;
2333                 case 'A': remoteoffset =  -1; break;
2334                 case 'B': remoteoffset =  -2; break;
2335                 case 'C': remoteoffset =  -3; break;
2336                 case 'D': remoteoffset =  -4; break;
2337                 case 'E': remoteoffset =  -5; break;
2338                 case 'F': remoteoffset =  -6; break;
2339                 case 'G': remoteoffset =  -7; break;
2340                 case 'H': remoteoffset =  -8; break;
2341                 case 'I': remoteoffset =  -9; break;
2342                 case 'K': remoteoffset = -10; break; /* J is not used */
2343                 case 'L': remoteoffset = -11; break;
2344                 case 'M': remoteoffset = -12; break;
2345                 case 'N': remoteoffset =   1; break;
2346                 case 'O': remoteoffset =   2; break;
2347                 case 'P': remoteoffset =   3; break;
2348                 case 'Q': remoteoffset =   4; break;
2349                 case 'R': remoteoffset =   5; break;
2350                 case 'S': remoteoffset =   6; break;
2351                 case 'T': remoteoffset =   7; break;
2352                 case 'U': remoteoffset =   8; break;
2353                 case 'V': remoteoffset =   9; break;
2354                 case 'W': remoteoffset =  10; break;
2355                 case 'X': remoteoffset =  11; break;
2356                 case 'Y': remoteoffset =  12; break;
2357                 default:  remoteoffset =   0; break;
2358                 }
2359                 remoteoffset = remoteoffset * 3600;
2360         }
2361
2362         return remoteoffset;
2363 }
2364
2365 time_t tzoffset_sec(time_t *now)
2366 {
2367         struct tm gmt, *lt;
2368         gint off;
2369
2370         gmt = *gmtime(now);
2371         lt = localtime(now);
2372
2373         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2374
2375         if (lt->tm_year < gmt.tm_year)
2376                 off -= 24 * 60;
2377         else if (lt->tm_year > gmt.tm_year)
2378                 off += 24 * 60;
2379         else if (lt->tm_yday < gmt.tm_yday)
2380                 off -= 24 * 60;
2381         else if (lt->tm_yday > gmt.tm_yday)
2382                 off += 24 * 60;
2383
2384         if (off >= 24 * 60)             /* should be impossible */
2385                 off = 23 * 60 + 59;     /* if not, insert silly value */
2386         if (off <= -24 * 60)
2387                 off = -(23 * 60 + 59);
2388         if (off > 12 * 60)
2389                 off -= 24 * 60;
2390         if (off < -12 * 60)
2391                 off += 24 * 60;
2392
2393         return off * 60;
2394 }
2395
2396 /* calculate timezone offset */
2397 gchar *tzoffset(time_t *now)
2398 {
2399         static gchar offset_string[6];
2400         struct tm gmt, *lt;
2401         gint off;
2402         gchar sign = '+';
2403
2404         gmt = *gmtime(now);
2405         lt = localtime(now);
2406
2407         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2408
2409         if (lt->tm_year < gmt.tm_year)
2410                 off -= 24 * 60;
2411         else if (lt->tm_year > gmt.tm_year)
2412                 off += 24 * 60;
2413         else if (lt->tm_yday < gmt.tm_yday)
2414                 off -= 24 * 60;
2415         else if (lt->tm_yday > gmt.tm_yday)
2416                 off += 24 * 60;
2417
2418         if (off < 0) {
2419                 sign = '-';
2420                 off = -off;
2421         }
2422
2423         if (off >= 24 * 60)             /* should be impossible */
2424                 off = 23 * 60 + 59;     /* if not, insert silly value */
2425
2426         sprintf(offset_string, "%c%02d%02d", sign, off / 60, off % 60);
2427
2428         return offset_string;
2429 }
2430
2431 void get_rfc822_date(gchar *buf, gint len)
2432 {
2433         struct tm *lt;
2434         time_t t;
2435         gchar day[4], mon[4];
2436         gint dd, hh, mm, ss, yyyy;
2437
2438         t = time(NULL);
2439         lt = localtime(&t);
2440
2441         sscanf(asctime(lt), "%3s %3s %d %d:%d:%d %d\n",
2442                day, mon, &dd, &hh, &mm, &ss, &yyyy);
2443         g_snprintf(buf, len, "%s, %d %s %d %02d:%02d:%02d %s",
2444                    day, dd, mon, yyyy, hh, mm, ss, tzoffset(&t));
2445 }
2446
2447 static FILE *log_fp = NULL;
2448
2449 void set_log_file(const gchar *filename)
2450 {
2451         if (log_fp) return;
2452         log_fp = fopen(filename, "wb");
2453         if (!log_fp)
2454                 FILE_OP_ERROR(filename, "fopen");
2455 }
2456
2457 void close_log_file(void)
2458 {
2459         if (log_fp) {
2460                 fclose(log_fp);
2461                 log_fp = NULL;
2462         }
2463 }
2464
2465 static guint log_verbosity_count = 0;
2466
2467 void log_verbosity_set(gboolean verbose)
2468 {
2469         if (verbose)
2470                 log_verbosity_count++;
2471         else if (log_verbosity_count > 0)
2472                 log_verbosity_count--;
2473 }
2474
2475 void debug_print_real(const gchar *format, ...)
2476 {
2477         va_list args;
2478         gchar buf[BUFFSIZE];
2479
2480         if (!debug_mode) return;
2481
2482         va_start(args, format);
2483         g_vsnprintf(buf, sizeof(buf), format, args);
2484         va_end(args);
2485
2486         fputs(buf, stdout);
2487 }
2488
2489 void log_print(const gchar *format, ...)
2490 {
2491         va_list args;
2492         gchar buf[BUFFSIZE];
2493         gchar *logbuf;
2494         gchar timestr[6];
2495         time_t t;
2496
2497         va_start(args, format);
2498         g_vsnprintf(buf, sizeof(buf), format, args);
2499         va_end(args);
2500
2501         time(&t);
2502         strftime(timestr, 6, "%H:%M", localtime(&t));
2503         logbuf = g_strdup_printf("[%s] %s", timestr, buf);
2504
2505         if (debug_mode) fputs(logbuf, stdout);
2506         log_window_append(logbuf, LOG_NORMAL);
2507         if (log_fp) {
2508                 fputs(logbuf, log_fp);
2509                 fflush(log_fp);
2510         }
2511         if (log_verbosity_count)
2512                 statusbar_puts_all(buf);
2513         g_free(logbuf);
2514 }
2515
2516 void log_message(const gchar *format, ...)
2517 {
2518         va_list args;
2519         gchar buf[BUFFSIZE];
2520
2521         va_start(args, format);
2522         g_vsnprintf(buf, sizeof(buf), format, args);
2523         va_end(args);
2524
2525         if (debug_mode) g_message("%s", buf);
2526         log_window_append(buf, LOG_MSG);
2527         if (log_fp) {
2528                 fputs("message: ", log_fp);
2529                 fputs(buf, log_fp);
2530                 fflush(log_fp);
2531         }
2532         statusbar_puts_all(buf);
2533 }
2534
2535 void log_warning(const gchar *format, ...)
2536 {
2537         va_list args;
2538         gchar buf[BUFFSIZE];
2539
2540         va_start(args, format);
2541         g_vsnprintf(buf, sizeof(buf), format, args);
2542         va_end(args);
2543
2544         g_warning("%s", buf);
2545         log_window_append(buf, LOG_WARN);
2546         if (log_fp) {
2547                 fputs("*** warning: ", log_fp);
2548                 fputs(buf, log_fp);
2549                 fflush(log_fp);
2550         }
2551 }
2552
2553 void log_error(const gchar *format, ...)
2554 {
2555         va_list args;
2556         gchar buf[BUFFSIZE];
2557
2558         va_start(args, format);
2559         g_vsnprintf(buf, sizeof(buf), format, args);
2560         va_end(args);
2561
2562         g_warning("%s", buf);
2563         log_window_append(buf, LOG_ERROR);
2564         if (log_fp) {
2565                 fputs("*** error: ", log_fp);
2566                 fputs(buf, log_fp);
2567                 fflush(log_fp);
2568         }
2569 }
2570
2571
2572 void * subject_table_lookup(GHashTable *subject_table, gchar * subject)
2573 {
2574         if (subject == NULL)
2575                 subject = "";
2576
2577         if (g_strncasecmp(subject, "Re: ", 4) == 0)
2578                 return g_hash_table_lookup(subject_table, subject + 4);
2579         else
2580                 return g_hash_table_lookup(subject_table, subject);
2581 }
2582
2583 void subject_table_insert(GHashTable *subject_table, gchar * subject,
2584                           void * data)
2585 {
2586         if (subject == NULL)
2587                 return;
2588         if (* subject == 0)
2589                 return;
2590         if (g_strcasecmp(subject, "Re:") == 0)
2591                 return;
2592         if (g_strcasecmp(subject, "Re: ") == 0)
2593                 return;
2594
2595         if (g_strncasecmp(subject, "Re: ", 4) == 0)
2596                 g_hash_table_insert(subject_table, subject + 4, data);
2597         else
2598                 g_hash_table_insert(subject_table, subject, data);
2599 }
2600
2601 void subject_table_remove(GHashTable *subject_table, gchar * subject)
2602 {
2603         if (subject == NULL)
2604                 return;
2605
2606         if (g_strncasecmp(subject, "Re: ", 4) == 0)
2607                 g_hash_table_remove(subject_table, subject + 4);
2608         else
2609                 g_hash_table_remove(subject_table, subject);
2610 }
2611
2612 gboolean subject_is_reply(const gchar *subject)
2613 {
2614         /* XXX: just simply here so someone can handle really
2615          * advanced Re: detection like "Re[4]", "ANTW:" or
2616          * Re: Re: Re: Re: Re: Re: Re: Re:" stuff. */
2617         if (subject == NULL) return FALSE;
2618         else return 0 == g_strncasecmp(subject, "Re: ", 4);
2619 }