src/common/utils.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2016 Hiroyuki Yamamoto & The Claws Mail Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The code of the g_utf8_substring function below is owned by
  19  * Matthias Clasen <matthiasc@src.gnome.org>/<mclasen@redhat.com>
  20  * and is got from GLIB 2.30: https://git.gnome.org/browse/glib/commit/
  21  *  ?h=glib-2-30&id=9eb65dd3ed5e1a9638595cbe10699c7606376511
  22  *
  23  * GLib 2.30 is licensed under GPL v2 or later and:
  24  * Copyright (C) 1999 Tom Tromey
  25  * Copyright (C) 2000 Red Hat, Inc.
  26  *
  27  * https://git.gnome.org/browse/glib/tree/glib/gutf8.c
  28  *  ?h=glib-2-30&id=9eb65dd3ed5e1a9638595cbe10699c7606376511
  29  */
  30
  31 #ifdef HAVE_CONFIG_H
  32 #  include "config.h"
  33 #include "claws-features.h"
  34 #endif
  35
  36 #include "defs.h"
  37
  38 #include <glib.h>
  39 #include <gio/gio.h>
  40
  41 #include <glib/gi18n.h>
  42
  43 #ifdef USE_PTHREAD
  44 #include <pthread.h>
  45 #endif
  46
  47 #include <stdio.h>
  48 #include <string.h>
  49 #include <ctype.h>
  50 #include <errno.h>
  51 #include <sys/param.h>
  52 #ifndef G_OS_WIN32
  53 #include <sys/socket.h>
  54 #endif
  55
  56 #if (HAVE_WCTYPE_H && HAVE_WCHAR_H)
  57 #  include <wchar.h>
  58 #  include <wctype.h>
  59 #endif
  60 #include <stdlib.h>
  61 #include <sys/stat.h>
  62 #include <unistd.h>
  63 #include <stdarg.h>
  64 #include <sys/types.h>
  65 #if HAVE_SYS_WAIT_H
  66 #  include <sys/wait.h>
  67 #endif
  68 #include <dirent.h>
  69 #include <time.h>
  70 #include <regex.h>
  71
  72 #ifdef G_OS_UNIX
  73 #include <sys/utsname.h>
  74 #endif
  75
  76 #include <fcntl.h>
  77
  78 #ifdef G_OS_WIN32
  79 #  include <direct.h>
  80 #  include <io.h>
  81 #  include <w32lib.h>
  82 #endif
  83
  84 #include "utils.h"
  85 #include "socket.h"
  86 #include "../codeconv.h"
  87 #include "tlds.h"
  88
  89 #define BUFFSIZE        8192
  90
  91 static gboolean debug_mode = FALSE;
  92
  93 #if !GLIB_CHECK_VERSION(2, 26, 0)
  94 guchar *g_base64_decode_wa(const gchar *text, gsize *out_len)
  95 {
  96         guchar *ret;
  97         gsize input_length;
  98         gint state = 0;
  99         guint save = 0;
 100
 101         input_length = strlen(text);
 102
 103         ret = g_malloc0((input_length / 4) * 3 + 1);
 104
 105         *out_len = g_base64_decode_step(text, input_length, ret, &state, &save);
 106
 107         return ret;
 108 }
 109 #endif
 110
 111 /* Return true if we are running as root.  This function should beused
 112    instead of getuid () == 0.  */
 113 gboolean superuser_p (void)
 114 {
 115 #ifdef G_OS_WIN32
 116   return w32_is_administrator ();
 117 #else
 118   return !getuid();
 119 #endif
 120 }
 121
 122 GSList *slist_copy_deep(GSList *list, GCopyFunc func)
 123 {
 124 #if GLIB_CHECK_VERSION(2, 34, 0)
 125         return g_slist_copy_deep(list, func, NULL);
 126 #else
 127         GSList *res = g_slist_copy(list);
 128         GSList *walk = res;
 129         while (walk) {
 130                 walk->data = func(walk->data, NULL);
 131                 walk = walk->next;
 132         }
 133         return res;
 134 #endif
 135 }
 136
 137 void list_free_strings(GList *list)
 138 {
 139         list = g_list_first(list);
 140
 141         while (list != NULL) {
 142                 g_free(list->data);
 143                 list = list->next;
 144         }
 145 }
 146
 147 void slist_free_strings(GSList *list)
 148 {
 149         while (list != NULL) {
 150                 g_free(list->data);
 151                 list = list->next;
 152         }
 153 }
 154
 155 void slist_free_strings_full(GSList *list)
 156 {
 157 #if GLIB_CHECK_VERSION(2,28,0)
 158         g_slist_free_full(list, (GDestroyNotify)g_free);
 159 #else
 160         g_slist_foreach(list, (GFunc)g_free, NULL);
 161         g_slist_free(list);
 162 #endif
 163 }
 164
 165 static void hash_free_strings_func(gpointer key, gpointer value, gpointer data)
 166 {
 167         g_free(key);
 168 }
 169
 170 void hash_free_strings(GHashTable *table)
 171 {
 172         g_hash_table_foreach(table, hash_free_strings_func, NULL);
 173 }
 174
 175 gint str_case_equal(gconstpointer v, gconstpointer v2)
 176 {
 177         return g_ascii_strcasecmp((const gchar *)v, (const gchar *)v2) == 0;
 178 }
 179
 180 guint str_case_hash(gconstpointer key)
 181 {
 182         const gchar *p = key;
 183         guint h = *p;
 184
 185         if (h) {
 186                 h = g_ascii_tolower(h);
 187                 for (p += 1; *p != '\0'; p++)
 188                         h = (h << 5) - h + g_ascii_tolower(*p);
 189         }
 190
 191         return h;
 192 }
 193
 194 void ptr_array_free_strings(GPtrArray *array)
 195 {
 196         gint i;
 197         gchar *str;
 198
 199         cm_return_if_fail(array != NULL);
 200
 201         for (i = 0; i < array->len; i++) {
 202                 str = g_ptr_array_index(array, i);
 203                 g_free(str);
 204         }
 205 }
 206
 207 gint to_number(const gchar *nstr)
 208 {
 209         register const gchar *p;
 210
 211         if (*nstr == '\0') return -1;
 212
 213         for (p = nstr; *p != '\0'; p++)
 214                 if (!g_ascii_isdigit(*p)) return -1;
 215
 216         return atoi(nstr);
 217 }
 218
 219 /* convert integer into string,
 220    nstr must be not lower than 11 characters length */
 221 gchar *itos_buf(gchar *nstr, gint n)
 222 {
 223         g_snprintf(nstr, 11, "%d", n);
 224         return nstr;
 225 }
 226
 227 /* convert integer into string */
 228 gchar *itos(gint n)
 229 {
 230         static gchar nstr[11];
 231
 232         return itos_buf(nstr, n);
 233 }
 234
 235 #define divide(num,divisor,i,d)         \
 236 {                                       \
 237         i = num >> divisor;             \
 238         d = num & ((1<<divisor)-1);     \
 239         d = (d*100) >> divisor;         \
 240 }
 241
 242
 243 /*!
 244  * \brief Convert a given size in bytes in a human-readable string
 245  *
 246  * \param size  The size expressed in bytes to convert in string
 247  * \return      The string that respresents the size in an human-readable way
 248  */
 249 gchar *to_human_readable(goffset size)
 250 {
 251         static gchar str[14];
 252         static gchar *b_format = NULL, *kb_format = NULL,
 253                      *mb_format = NULL, *gb_format = NULL;
 254         register int t = 0, r = 0;
 255         if (b_format == NULL) {
 256                 b_format  = _("%dB");
 257                 kb_format = _("%d.%02dKB");
 258                 mb_format = _("%d.%02dMB");
 259                 gb_format = _("%.2fGB");
 260         }
 261
 262         if (size < (goffset)1024) {
 263                 g_snprintf(str, sizeof(str), b_format, (gint)size);
 264                 return str;
 265         } else if (size >> 10 < (goffset)1024) {
 266                 divide(size, 10, t, r);
 267                 g_snprintf(str, sizeof(str), kb_format, t, r);
 268                 return str;
 269         } else if (size >> 20 < (goffset)1024) {
 270                 divide(size, 20, t, r);
 271                 g_snprintf(str, sizeof(str), mb_format, t, r);
 272                 return str;
 273         } else {
 274                 g_snprintf(str, sizeof(str), gb_format, (gfloat)(size >> 30));
 275                 return str;
 276         }
 277 }
 278
 279 /* strcmp with NULL-checking */
 280 gint strcmp2(const gchar *s1, const gchar *s2)
 281 {
 282         if (s1 == NULL || s2 == NULL)
 283                 return -1;
 284         else
 285                 return strcmp(s1, s2);
 286 }
 287 /* strstr with NULL-checking */
 288 gchar *strstr2(const gchar *s1, const gchar *s2)
 289 {
 290         if (s1 == NULL || s2 == NULL)
 291                 return NULL;
 292         else
 293                 return strstr(s1, s2);
 294 }
 295 /* compare paths */
 296 gint path_cmp(const gchar *s1, const gchar *s2)
 297 {
 298         gint len1, len2;
 299         int rc;
 300 #ifdef G_OS_WIN32
 301         gchar *s1buf, *s2buf;
 302 #endif
 303
 304         if (s1 == NULL || s2 == NULL) return -1;
 305         if (*s1 == '\0' || *s2 == '\0') return -1;
 306
 307 #ifdef G_OS_WIN32
 308         s1buf = g_strdup (s1);
 309         s2buf = g_strdup (s2);
 310         subst_char (s1buf, '/', G_DIR_SEPARATOR);
 311         subst_char (s2buf, '/', G_DIR_SEPARATOR);
 312         s1 = s1buf;
 313         s2 = s2buf;
 314 #endif /* !G_OS_WIN32 */
 315
 316         len1 = strlen(s1);
 317         len2 = strlen(s2);
 318
 319         if (s1[len1 - 1] == G_DIR_SEPARATOR) len1--;
 320         if (s2[len2 - 1] == G_DIR_SEPARATOR) len2--;
 321
 322         rc = strncmp(s1, s2, MAX(len1, len2));
 323 #ifdef G_OS_WIN32
 324         g_free (s1buf);
 325         g_free (s2buf);
 326 #endif /* !G_OS_WIN32 */
 327         return rc;
 328 }
 329
 330 /* remove trailing return code */
 331 gchar *strretchomp(gchar *str)
 332 {
 333         register gchar *s;
 334
 335         if (!*str) return str;
 336
 337         for (s = str + strlen(str) - 1;
 338              s >= str && (*s == '\n' || *s == '\r');
 339              s--)
 340                 *s = '\0';
 341
 342         return str;
 343 }
 344
 345 /* remove trailing character */
 346 gchar *strtailchomp(gchar *str, gchar tail_char)
 347 {
 348         register gchar *s;
 349
 350         if (!*str) return str;
 351         if (tail_char == '\0') return str;
 352
 353         for (s = str + strlen(str) - 1; s >= str && *s == tail_char; s--)
 354                 *s = '\0';
 355
 356         return str;
 357 }
 358
 359 /* remove CR (carriage return) */
 360 gchar *strcrchomp(gchar *str)
 361 {
 362         register gchar *s;
 363
 364         if (!*str) return str;
 365
 366         s = str + strlen(str) - 1;
 367         if (*s == '\n' && s > str && *(s - 1) == '\r') {
 368                 *(s - 1) = '\n';
 369                 *s = '\0';
 370         }
 371
 372         return str;
 373 }
 374
 375 gint file_strip_crs(const gchar *file)
 376 {
 377         FILE *fp = NULL, *outfp = NULL;
 378         gchar buf[4096];
 379         gchar *out = get_tmp_file();
 380         if (file == NULL)
 381                 goto freeout;
 382
 383         fp = g_fopen(file, "rb");
 384         if (!fp)
 385                 goto freeout;
 386
 387         outfp = g_fopen(out, "wb");
 388         if (!outfp) {
 389                 fclose(fp);
 390                 goto freeout;
 391         }
 392
 393         while (fgets(buf, sizeof (buf), fp) != NULL) {
 394                 strcrchomp(buf);
 395                 if (fputs(buf, outfp) == EOF) {
 396                         fclose(fp);
 397                         fclose(outfp);
 398                         goto unlinkout;
 399                 }
 400         }
 401
 402         fclose(fp);
 403         if (fclose(outfp) == EOF) {
 404                 goto unlinkout;
 405         }
 406
 407         if (move_file(out, file, TRUE) < 0)
 408                 goto unlinkout;
 409
 410         g_free(out);
 411         return 0;
 412 unlinkout:
 413         claws_unlink(out);
 414 freeout:
 415         g_free(out);
 416         return -1;
 417 }
 418
 419 /* Similar to `strstr' but this function ignores the case of both strings.  */
 420 gchar *strcasestr(const gchar *haystack, const gchar *needle)
 421 {
 422         size_t haystack_len = strlen(haystack);
 423
 424         return strncasestr(haystack, haystack_len, needle);
 425 }
 426
 427 gchar *strncasestr(const gchar *haystack, gint haystack_len, const gchar *needle)
 428 {
 429         register size_t needle_len;
 430
 431         needle_len   = strlen(needle);
 432
 433         if (haystack_len < needle_len || needle_len == 0)
 434                 return NULL;
 435
 436         while (haystack_len >= needle_len) {
 437                 if (!g_ascii_strncasecmp(haystack, needle, needle_len))
 438                         return (gchar *)haystack;
 439                 else {
 440                         haystack++;
 441                         haystack_len--;
 442                 }
 443         }
 444
 445         return NULL;
 446 }
 447
 448 gpointer my_memmem(gconstpointer haystack, size_t haystacklen,
 449                    gconstpointer needle, size_t needlelen)
 450 {
 451         const gchar *haystack_ = (const gchar *)haystack;
 452         const gchar *needle_ = (const gchar *)needle;
 453         const gchar *haystack_cur = (const gchar *)haystack;
 454         size_t haystack_left = haystacklen;
 455
 456         if (needlelen == 1)
 457                 return memchr(haystack_, *needle_, haystacklen);
 458
 459         while ((haystack_cur = memchr(haystack_cur, *needle_, haystack_left))
 460                != NULL) {
 461                 if (haystacklen - (haystack_cur - haystack_) < needlelen)
 462                         break;
 463                 if (memcmp(haystack_cur + 1, needle_ + 1, needlelen - 1) == 0)
 464                         return (gpointer)haystack_cur;
 465                 else{
 466                         haystack_cur++;
 467                         haystack_left = haystacklen - (haystack_cur - haystack_);
 468                 }
 469         }
 470
 471         return NULL;
 472 }
 473
 474 /* Copy no more than N characters of SRC to DEST, with NULL terminating.  */
 475 gchar *strncpy2(gchar *dest, const gchar *src, size_t n)
 476 {
 477         register const gchar *s = src;
 478         register gchar *d = dest;
 479
 480         while (--n && *s)
 481                 *d++ = *s++;
 482         *d = '\0';
 483
 484         return dest;
 485 }
 486
 487
 488 /* Examine if next block is non-ASCII string */
 489 gboolean is_next_nonascii(const gchar *s)
 490 {
 491         const gchar *p;
 492
 493         /* skip head space */
 494         for (p = s; *p != '\0' && g_ascii_isspace(*p); p++)
 495                 ;
 496         for (; *p != '\0' && !g_ascii_isspace(*p); p++) {
 497                 if (*(guchar *)p > 127 || *(guchar *)p < 32)
 498                         return TRUE;
 499         }
 500
 501         return FALSE;
 502 }
 503
 504 gint get_next_word_len(const gchar *s)
 505 {
 506         gint len = 0;
 507
 508         for (; *s != '\0' && !g_ascii_isspace(*s); s++, len++)
 509                 ;
 510
 511         return len;
 512 }
 513
 514 static void trim_subject_for_compare(gchar *str)
 515 {
 516         gchar *srcp;
 517
 518         eliminate_parenthesis(str, '[', ']');
 519         eliminate_parenthesis(str, '(', ')');
 520         g_strstrip(str);
 521
 522         srcp = str + subject_get_prefix_length(str);
 523         if (srcp != str)
 524                 memmove(str, srcp, strlen(srcp) + 1);
 525 }
 526
 527 static void trim_subject_for_sort(gchar *str)
 528 {
 529         gchar *srcp;
 530
 531         g_strstrip(str);
 532
 533         srcp = str + subject_get_prefix_length(str);
 534         if (srcp != str)
 535                 memmove(str, srcp, strlen(srcp) + 1);
 536 }
 537
 538 /* compare subjects */
 539 gint subject_compare(const gchar *s1, const gchar *s2)
 540 {
 541         gchar *str1, *str2;
 542
 543         if (!s1 || !s2) return -1;
 544         if (!*s1 || !*s2) return -1;
 545
 546         Xstrdup_a(str1, s1, return -1);
 547         Xstrdup_a(str2, s2, return -1);
 548
 549         trim_subject_for_compare(str1);
 550         trim_subject_for_compare(str2);
 551
 552         if (!*str1 || !*str2) return -1;
 553
 554         return strcmp(str1, str2);
 555 }
 556
 557 gint subject_compare_for_sort(const gchar *s1, const gchar *s2)
 558 {
 559         gchar *str1, *str2;
 560
 561         if (!s1 || !s2) return -1;
 562
 563         Xstrdup_a(str1, s1, return -1);
 564         Xstrdup_a(str2, s2, return -1);
 565
 566         trim_subject_for_sort(str1);
 567         trim_subject_for_sort(str2);
 568
 569         return g_utf8_collate(str1, str2);
 570 }
 571
 572 void trim_subject(gchar *str)
 573 {
 574         register gchar *srcp;
 575         gchar op, cl;
 576         gint in_brace;
 577
 578         g_strstrip(str);
 579
 580         srcp = str + subject_get_prefix_length(str);
 581
 582         if (*srcp == '[') {
 583                 op = '[';
 584                 cl = ']';
 585         } else if (*srcp == '(') {
 586                 op = '(';
 587                 cl = ')';
 588         } else
 589                 op = 0;
 590
 591         if (op) {
 592                 ++srcp;
 593                 in_brace = 1;
 594                 while (*srcp) {
 595                         if (*srcp == op)
 596                                 in_brace++;
 597                         else if (*srcp == cl)
 598                                 in_brace--;
 599                         srcp++;
 600                         if (in_brace == 0)
 601                                 break;
 602                 }
 603         }
 604         while (g_ascii_isspace(*srcp)) srcp++;
 605         memmove(str, srcp, strlen(srcp) + 1);
 606 }
 607
 608 void eliminate_parenthesis(gchar *str, gchar op, gchar cl)
 609 {
 610         register gchar *srcp, *destp;
 611         gint in_brace;
 612
 613         destp = str;
 614
 615         while ((destp = strchr(destp, op))) {
 616                 in_brace = 1;
 617                 srcp = destp + 1;
 618                 while (*srcp) {
 619                         if (*srcp == op)
 620                                 in_brace++;
 621                         else if (*srcp == cl)
 622                                 in_brace--;
 623                         srcp++;
 624                         if (in_brace == 0)
 625                                 break;
 626                 }
 627                 while (g_ascii_isspace(*srcp)) srcp++;
 628                 memmove(destp, srcp, strlen(srcp) + 1);
 629         }
 630 }
 631
 632 void extract_parenthesis(gchar *str, gchar op, gchar cl)
 633 {
 634         register gchar *srcp, *destp;
 635         gint in_brace;
 636
 637         destp = str;
 638
 639         while ((srcp = strchr(destp, op))) {
 640                 if (destp > str)
 641                         *destp++ = ' ';
 642                 memmove(destp, srcp + 1, strlen(srcp));
 643                 in_brace = 1;
 644                 while(*destp) {
 645                         if (*destp == op)
 646                                 in_brace++;
 647                         else if (*destp == cl)
 648                                 in_brace--;
 649
 650                         if (in_brace == 0)
 651                                 break;
 652
 653                         destp++;
 654                 }
 655         }
 656         *destp = '\0';
 657 }
 658
 659 static void extract_parenthesis_with_skip_quote(gchar *str, gchar quote_chr,
 660                                          gchar op, gchar cl)
 661 {
 662         register gchar *srcp, *destp;
 663         gint in_brace;
 664         gboolean in_quote = FALSE;
 665
 666         destp = str;
 667
 668         while ((srcp = strchr_with_skip_quote(destp, quote_chr, op))) {
 669                 if (destp > str)
 670                         *destp++ = ' ';
 671                 memmove(destp, srcp + 1, strlen(srcp));
 672                 in_brace = 1;
 673                 while(*destp) {
 674                         if (*destp == op && !in_quote)
 675                                 in_brace++;
 676                         else if (*destp == cl && !in_quote)
 677                                 in_brace--;
 678                         else if (*destp == quote_chr)
 679                                 in_quote ^= TRUE;
 680
 681                         if (in_brace == 0)
 682                                 break;
 683
 684                         destp++;
 685                 }
 686         }
 687         *destp = '\0';
 688 }
 689
 690 void extract_quote(gchar *str, gchar quote_chr)
 691 {
 692         register gchar *p;
 693
 694         if ((str = strchr(str, quote_chr))) {
 695                 p = str;
 696                 while ((p = strchr(p + 1, quote_chr)) && (p[-1] == '\\')) {
 697                         memmove(p - 1, p, strlen(p) + 1);
 698                         p--;
 699                 }
 700                 if(p) {
 701                         *p = '\0';
 702                         memmove(str, str + 1, p - str);
 703                 }
 704         }
 705 }
 706
 707 /* Returns a newly allocated string with all quote_chr not at the beginning
 708    or the end of str escaped with '\' or the given str if not required. */
 709 gchar *escape_internal_quotes(gchar *str, gchar quote_chr)
 710 {
 711         register gchar *p, *q;
 712         gchar *qstr;
 713         int k = 0, l = 0;
 714
 715         if (str == NULL || *str == '\0')
 716                 return str;
 717
 718         /* search for unescaped quote_chr */
 719         p = str;
 720         if (*p == quote_chr)
 721                 ++p, ++l;
 722         while (*p) {
 723                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 724                         ++k;
 725                 ++p, ++l;
 726         }
 727         if (!k) /* nothing to escape */
 728                 return str;
 729
 730         /* unescaped quote_chr found */
 731         qstr = g_malloc(l + k + 1);
 732         p = str;
 733         q = qstr;
 734         if (*p == quote_chr) {
 735                 *q = quote_chr;
 736                 ++p, ++q;
 737         }
 738         while (*p) {
 739                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 740                         *q++ = '\\';
 741                 *q++ = *p++;
 742         }
 743         *q = '\0';
 744
 745         return qstr;
 746 }
 747
 748 void eliminate_address_comment(gchar *str)
 749 {
 750         register gchar *srcp, *destp;
 751         gint in_brace;
 752
 753         destp = str;
 754
 755         while ((destp = strchr(destp, '"'))) {
 756                 if ((srcp = strchr(destp + 1, '"'))) {
 757                         srcp++;
 758                         if (*srcp == '@') {
 759                                 destp = srcp + 1;
 760                         } else {
 761                                 while (g_ascii_isspace(*srcp)) srcp++;
 762                                 memmove(destp, srcp, strlen(srcp) + 1);
 763                         }
 764                 } else {
 765                         *destp = '\0';
 766                         break;
 767                 }
 768         }
 769
 770         destp = str;
 771
 772         while ((destp = strchr_with_skip_quote(destp, '"', '('))) {
 773                 in_brace = 1;
 774                 srcp = destp + 1;
 775                 while (*srcp) {
 776                         if (*srcp == '(')
 777                                 in_brace++;
 778                         else if (*srcp == ')')
 779                                 in_brace--;
 780                         srcp++;
 781                         if (in_brace == 0)
 782                                 break;
 783                 }
 784                 while (g_ascii_isspace(*srcp)) srcp++;
 785                 memmove(destp, srcp, strlen(srcp) + 1);
 786         }
 787 }
 788
 789 gchar *strchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
 790 {
 791         gboolean in_quote = FALSE;
 792
 793         while (*str) {
 794                 if (*str == c && !in_quote)
 795                         return (gchar *)str;
 796                 if (*str == quote_chr)
 797                         in_quote ^= TRUE;
 798                 str++;
 799         }
 800
 801         return NULL;
 802 }
 803
 804 void extract_address(gchar *str)
 805 {
 806         cm_return_if_fail(str != NULL);
 807         eliminate_address_comment(str);
 808         if (strchr_with_skip_quote(str, '"', '<'))
 809                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 810         g_strstrip(str);
 811 }
 812
 813 void extract_list_id_str(gchar *str)
 814 {
 815         if (strchr_with_skip_quote(str, '"', '<'))
 816                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 817         g_strstrip(str);
 818 }
 819
 820 static GSList *address_list_append_real(GSList *addr_list, const gchar *str, gboolean removecomments)
 821 {
 822         gchar *work;
 823         gchar *workp;
 824
 825         if (!str) return addr_list;
 826
 827         Xstrdup_a(work, str, return addr_list);
 828
 829         if (removecomments)
 830                 eliminate_address_comment(work);
 831         workp = work;
 832
 833         while (workp && *workp) {
 834                 gchar *p, *next;
 835
 836                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 837                         *p = '\0';
 838                         next = p + 1;
 839                 } else
 840                         next = NULL;
 841
 842                 if (removecomments && strchr_with_skip_quote(workp, '"', '<'))
 843                         extract_parenthesis_with_skip_quote
 844                                 (workp, '"', '<', '>');
 845
 846                 g_strstrip(workp);
 847                 if (*workp)
 848                         addr_list = g_slist_append(addr_list, g_strdup(workp));
 849
 850                 workp = next;
 851         }
 852
 853         return addr_list;
 854 }
 855
 856 GSList *address_list_append(GSList *addr_list, const gchar *str)
 857 {
 858         return address_list_append_real(addr_list, str, TRUE);
 859 }
 860
 861 GSList *address_list_append_with_comments(GSList *addr_list, const gchar *str)
 862 {
 863         return address_list_append_real(addr_list, str, FALSE);
 864 }
 865
 866 GSList *references_list_prepend(GSList *msgid_list, const gchar *str)
 867 {
 868         const gchar *strp;
 869
 870         if (!str) return msgid_list;
 871         strp = str;
 872
 873         while (strp && *strp) {
 874                 const gchar *start, *end;
 875                 gchar *msgid;
 876
 877                 if ((start = strchr(strp, '<')) != NULL) {
 878                         end = strchr(start + 1, '>');
 879                         if (!end) break;
 880                 } else
 881                         break;
 882
 883                 msgid = g_strndup(start + 1, end - start - 1);
 884                 g_strstrip(msgid);
 885                 if (*msgid)
 886                         msgid_list = g_slist_prepend(msgid_list, msgid);
 887                 else
 888                         g_free(msgid);
 889
 890                 strp = end + 1;
 891         }
 892
 893         return msgid_list;
 894 }
 895
 896 GSList *references_list_append(GSList *msgid_list, const gchar *str)
 897 {
 898         GSList *list;
 899
 900         list = references_list_prepend(NULL, str);
 901         list = g_slist_reverse(list);
 902         msgid_list = g_slist_concat(msgid_list, list);
 903
 904         return msgid_list;
 905 }
 906
 907 GSList *newsgroup_list_append(GSList *group_list, const gchar *str)
 908 {
 909         gchar *work;
 910         gchar *workp;
 911
 912         if (!str) return group_list;
 913
 914         Xstrdup_a(work, str, return group_list);
 915
 916         workp = work;
 917
 918         while (workp && *workp) {
 919                 gchar *p, *next;
 920
 921                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 922                         *p = '\0';
 923                         next = p + 1;
 924                 } else
 925                         next = NULL;
 926
 927                 g_strstrip(workp);
 928                 if (*workp)
 929                         group_list = g_slist_append(group_list,
 930                                                     g_strdup(workp));
 931
 932                 workp = next;
 933         }
 934
 935         return group_list;
 936 }
 937
 938 GList *add_history(GList *list, const gchar *str)
 939 {
 940         GList *old;
 941         gchar *oldstr;
 942
 943         cm_return_val_if_fail(str != NULL, list);
 944
 945         old = g_list_find_custom(list, (gpointer)str, (GCompareFunc)strcmp2);
 946         if (old) {
 947                 oldstr = old->data;
 948                 list = g_list_remove(list, old->data);
 949                 g_free(oldstr);
 950         } else if (g_list_length(list) >= MAX_HISTORY_SIZE) {
 951                 GList *last;
 952
 953                 last = g_list_last(list);
 954                 if (last) {
 955                         oldstr = last->data;
 956                         list = g_list_remove(list, last->data);
 957                         g_free(oldstr);
 958                 }
 959         }
 960
 961         list = g_list_prepend(list, g_strdup(str));
 962
 963         return list;
 964 }
 965
 966 void remove_return(gchar *str)
 967 {
 968         register gchar *p = str;
 969
 970         while (*p) {
 971                 if (*p == '\n' || *p == '\r')
 972                         memmove(p, p + 1, strlen(p));
 973                 else
 974                         p++;
 975         }
 976 }
 977
 978 void remove_space(gchar *str)
 979 {
 980         register gchar *p = str;
 981         register gint spc;
 982
 983         while (*p) {
 984                 spc = 0;
 985                 while (g_ascii_isspace(*(p + spc)))
 986                         spc++;
 987                 if (spc)
 988                         memmove(p, p + spc, strlen(p + spc) + 1);
 989                 else
 990                         p++;
 991         }
 992 }
 993
 994 void unfold_line(gchar *str)
 995 {
 996         register gchar *ch;
 997         register gunichar c;
 998         register gint len;
 999
1000         ch = str; /* iterator for source string */
1001
1002         while (*ch != 0) {
1003                 c = g_utf8_get_char_validated(ch, -1);
1004
1005                 if (c == (gunichar)-1 || c == (gunichar)-2) {
1006                         /* non-unicode byte, move past it */
1007                         ch++;
1008                         continue;
1009                 }
1010
1011                 len = g_unichar_to_utf8(c, NULL);
1012
1013                 if (!g_unichar_isdefined(c) || !g_unichar_isprint(c) ||
1014                                 g_unichar_isspace(c)) {
1015                         /* replace anything bad or whitespacey with a single space */
1016                         *ch = ' ';
1017                         ch++;
1018                         if (len > 1) {
1019                                 /* move rest of the string forwards, since we just replaced
1020                                  * a multi-byte sequence with one byte */
1021                                 memmove(ch, ch + len-1, strlen(ch + len-1) + 1);
1022                         }
1023                 } else {
1024                         /* A valid unicode character, copy it. */
1025                         ch += len;
1026                 }
1027         }
1028 }
1029
1030 void subst_char(gchar *str, gchar orig, gchar subst)
1031 {
1032         register gchar *p = str;
1033
1034         while (*p) {
1035                 if (*p == orig)
1036                         *p = subst;
1037                 p++;
1038         }
1039 }
1040
1041 void subst_chars(gchar *str, gchar *orig, gchar subst)
1042 {
1043         register gchar *p = str;
1044
1045         while (*p) {
1046                 if (strchr(orig, *p) != NULL)
1047                         *p = subst;
1048                 p++;
1049         }
1050 }
1051
1052 void subst_for_filename(gchar *str)
1053 {
1054         if (!str)
1055                 return;
1056 #ifdef G_OS_WIN32
1057         subst_chars(str, "\t\r\n\\/*:", '_');
1058 #else
1059         subst_chars(str, "\t\r\n\\/*", '_');
1060 #endif
1061 }
1062
1063 void subst_for_shellsafe_filename(gchar *str)
1064 {
1065         if (!str)
1066                 return;
1067         subst_for_filename(str);
1068         subst_chars(str, " \"'|&;()<>'!{}[]",'_');
1069 }
1070
1071 gboolean is_ascii_str(const gchar *str)
1072 {
1073         const guchar *p = (const guchar *)str;
1074
1075         while (*p != '\0') {
1076                 if (*p != '\t' && *p != ' ' &&
1077                     *p != '\r' && *p != '\n' &&
1078                     (*p < 32 || *p >= 127))
1079                         return FALSE;
1080                 p++;
1081         }
1082
1083         return TRUE;
1084 }
1085
1086 static const gchar * line_has_quote_char_last(const gchar * str, const gchar *quote_chars)
1087 {
1088         gchar * position = NULL;
1089         gchar * tmp_pos = NULL;
1090         int i;
1091
1092         if (str == NULL || quote_chars == NULL)
1093                 return NULL;
1094
1095         for (i = 0; i < strlen(quote_chars); i++) {
1096                 tmp_pos = strrchr (str, quote_chars[i]);
1097                 if(position == NULL
1098                                 || (tmp_pos != NULL && position <= tmp_pos) )
1099                         position = tmp_pos;
1100         }
1101         return position;
1102 }
1103
1104 gint get_quote_level(const gchar *str, const gchar *quote_chars)
1105 {
1106         const gchar *first_pos;
1107         const gchar *last_pos;
1108         const gchar *p = str;
1109         gint quote_level = -1;
1110
1111         /* speed up line processing by only searching to the last '>' */
1112         if ((first_pos = line_has_quote_char(str, quote_chars)) != NULL) {
1113                 /* skip a line if it contains a '<' before the initial '>' */
1114                 if (memchr(str, '<', first_pos - str) != NULL)
1115                         return -1;
1116                 last_pos = line_has_quote_char_last(first_pos, quote_chars);
1117         } else
1118                 return -1;
1119
1120         while (p <= last_pos) {
1121                 while (p < last_pos) {
1122                         if (g_ascii_isspace(*p))
1123                                 p++;
1124                         else
1125                                 break;
1126                 }
1127
1128                 if (strchr(quote_chars, *p))
1129                         quote_level++;
1130                 else if (*p != '-' && !g_ascii_isspace(*p) && p <= last_pos) {
1131                         /* any characters are allowed except '-','<' and space */
1132                         while (*p != '-' && *p != '<'
1133                                && !strchr(quote_chars, *p)
1134                                && !g_ascii_isspace(*p)
1135                                && p < last_pos)
1136                                 p++;
1137                         if (strchr(quote_chars, *p))
1138                                 quote_level++;
1139                         else
1140                                 break;
1141                 }
1142
1143                 p++;
1144         }
1145
1146         return quote_level;
1147 }
1148
1149 gint check_line_length(const gchar *str, gint max_chars, gint *line)
1150 {
1151         const gchar *p = str, *q;
1152         gint cur_line = 0, len;
1153
1154         while ((q = strchr(p, '\n')) != NULL) {
1155                 len = q - p + 1;
1156                 if (len > max_chars) {
1157                         if (line)
1158                                 *line = cur_line;
1159                         return -1;
1160                 }
1161                 p = q + 1;
1162                 ++cur_line;
1163         }
1164
1165         len = strlen(p);
1166         if (len > max_chars) {
1167                 if (line)
1168                         *line = cur_line;
1169                 return -1;
1170         }
1171
1172         return 0;
1173 }
1174
1175 const gchar * line_has_quote_char(const gchar * str, const gchar *quote_chars)
1176 {
1177         gchar * position = NULL;
1178         gchar * tmp_pos = NULL;
1179         int i;
1180
1181         if (str == NULL || quote_chars == NULL)
1182                 return NULL;
1183
1184         for (i = 0; i < strlen(quote_chars); i++) {
1185                 tmp_pos = strchr (str, quote_chars[i]);
1186                 if(position == NULL
1187                                 || (tmp_pos != NULL && position >= tmp_pos) )
1188                         position = tmp_pos;
1189         }
1190         return position;
1191 }
1192
1193 static gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
1194 {
1195         register guint haystack_len, needle_len;
1196         gboolean in_squote = FALSE, in_dquote = FALSE;
1197
1198         haystack_len = strlen(haystack);
1199         needle_len   = strlen(needle);
1200
1201         if (haystack_len < needle_len || needle_len == 0)
1202                 return NULL;
1203
1204         while (haystack_len >= needle_len) {
1205                 if (!in_squote && !in_dquote &&
1206                     !strncmp(haystack, needle, needle_len))
1207                         return (gchar *)haystack;
1208
1209                 /* 'foo"bar"' -> foo"bar"
1210                    "foo'bar'" -> foo'bar' */
1211                 if (*haystack == '\'') {
1212                         if (in_squote)
1213                                 in_squote = FALSE;
1214                         else if (!in_dquote)
1215                                 in_squote = TRUE;
1216                 } else if (*haystack == '\"') {
1217                         if (in_dquote)
1218                                 in_dquote = FALSE;
1219                         else if (!in_squote)
1220                                 in_dquote = TRUE;
1221                 } else if (*haystack == '\\') {
1222                         haystack++;
1223                         haystack_len--;
1224                 }
1225
1226                 haystack++;
1227                 haystack_len--;
1228         }
1229
1230         return NULL;
1231 }
1232
1233 gchar **strsplit_with_quote(const gchar *str, const gchar *delim,
1234                             gint max_tokens)
1235 {
1236         GSList *string_list = NULL, *slist;
1237         gchar **str_array, *s, *new_str;
1238         guint i, n = 1, len;
1239
1240         cm_return_val_if_fail(str != NULL, NULL);
1241         cm_return_val_if_fail(delim != NULL, NULL);
1242
1243         if (max_tokens < 1)
1244                 max_tokens = G_MAXINT;
1245
1246         s = strstr_with_skip_quote(str, delim);
1247         if (s) {
1248                 guint delimiter_len = strlen(delim);
1249
1250                 do {
1251                         len = s - str;
1252                         new_str = g_strndup(str, len);
1253
1254                         if (new_str[0] == '\'' || new_str[0] == '\"') {
1255                                 if (new_str[len - 1] == new_str[0]) {
1256                                         new_str[len - 1] = '\0';
1257                                         memmove(new_str, new_str + 1, len - 1);
1258                                 }
1259                         }
1260                         string_list = g_slist_prepend(string_list, new_str);
1261                         n++;
1262                         str = s + delimiter_len;
1263                         s = strstr_with_skip_quote(str, delim);
1264                 } while (--max_tokens && s);
1265         }
1266
1267         if (*str) {
1268                 new_str = g_strdup(str);
1269                 if (new_str[0] == '\'' || new_str[0] == '\"') {
1270                         len = strlen(str);
1271                         if (new_str[len - 1] == new_str[0]) {
1272                                 new_str[len - 1] = '\0';
1273                                 memmove(new_str, new_str + 1, len - 1);
1274                         }
1275                 }
1276                 string_list = g_slist_prepend(string_list, new_str);
1277                 n++;
1278         }
1279
1280         str_array = g_new(gchar*, n);
1281
1282         i = n - 1;
1283
1284         str_array[i--] = NULL;
1285         for (slist = string_list; slist; slist = slist->next)
1286                 str_array[i--] = slist->data;
1287
1288         g_slist_free(string_list);
1289
1290         return str_array;
1291 }
1292
1293 gchar *get_abbrev_newsgroup_name(const gchar *group, gint len)
1294 {
1295         gchar *abbrev_group;
1296         gchar *ap;
1297         const gchar *p = group;
1298         const gchar *last;
1299
1300         cm_return_val_if_fail(group != NULL, NULL);
1301
1302         last = group + strlen(group);
1303         abbrev_group = ap = g_malloc(strlen(group) + 1);
1304
1305         while (*p) {
1306                 while (*p == '.')
1307                         *ap++ = *p++;
1308                 if ((ap - abbrev_group) + (last - p) > len && strchr(p, '.')) {
1309                         *ap++ = *p++;
1310                         while (*p != '.') p++;
1311                 } else {
1312                         strcpy(ap, p);
1313                         return abbrev_group;
1314                 }
1315         }
1316
1317         *ap = '\0';
1318         return abbrev_group;
1319 }
1320
1321 gchar *trim_string(const gchar *str, gint len)
1322 {
1323         const gchar *p = str;
1324         gint mb_len;
1325         gchar *new_str;
1326         gint new_len = 0;
1327
1328         if (!str) return NULL;
1329         if (strlen(str) <= len)
1330                 return g_strdup(str);
1331         if (g_utf8_validate(str, -1, NULL) == FALSE)
1332                 return g_strdup(str);
1333
1334         while (*p != '\0') {
1335                 mb_len = g_utf8_skip[*(guchar *)p];
1336                 if (mb_len == 0)
1337                         break;
1338                 else if (new_len + mb_len > len)
1339                         break;
1340
1341                 new_len += mb_len;
1342                 p += mb_len;
1343         }
1344
1345         Xstrndup_a(new_str, str, new_len, return g_strdup(str));
1346         return g_strconcat(new_str, "...", NULL);
1347 }
1348
1349 GList *uri_list_extract_filenames(const gchar *uri_list)
1350 {
1351         GList *result = NULL;
1352         const gchar *p, *q;
1353         gchar *escaped_utf8uri;
1354
1355         p = uri_list;
1356
1357         while (p) {
1358                 if (*p != '#') {
1359                         while (g_ascii_isspace(*p)) p++;
1360                         if (!strncmp(p, "file:", 5)) {
1361                                 q = p;
1362                                 q += 5;
1363                                 while (*q && *q != '\n' && *q != '\r') q++;
1364
1365                                 if (q > p) {
1366                                         gchar *file, *locale_file = NULL;
1367                                         q--;
1368                                         while (q > p && g_ascii_isspace(*q))
1369                                                 q--;
1370                                         Xalloca(escaped_utf8uri, q - p + 2,
1371                                                 return result);
1372                                         Xalloca(file, q - p + 2,
1373                                                 return result);
1374                                         *file = '\0';
1375                                         strncpy(escaped_utf8uri, p, q - p + 1);
1376                                         escaped_utf8uri[q - p + 1] = '\0';
1377                                         decode_uri_with_plus(file, escaped_utf8uri, FALSE);
1378                     /*
1379                      * g_filename_from_uri() rejects escaped/locale encoded uri
1380                      * string which come from Nautilus.
1381                      */
1382 #ifndef G_OS_WIN32
1383                                         if (g_utf8_validate(file, -1, NULL))
1384                                                 locale_file
1385                                                         = conv_codeset_strdup(
1386                                                                 file + 5,
1387                                                                 CS_UTF_8,
1388                                                                 conv_get_locale_charset_str());
1389                                         if (!locale_file)
1390                                                 locale_file = g_strdup(file + 5);
1391 #else
1392                                         locale_file = g_filename_from_uri(escaped_utf8uri, NULL, NULL);
1393 #endif
1394                                         result = g_list_append(result, locale_file);
1395                                 }
1396                         }
1397                 }
1398                 p = strchr(p, '\n');
1399                 if (p) p++;
1400         }
1401
1402         return result;
1403 }
1404
1405 /* Converts two-digit hexadecimal to decimal.  Used for unescaping escaped
1406  * characters
1407  */
1408 static gint axtoi(const gchar *hexstr)
1409 {
1410         gint hi, lo, result;
1411
1412         hi = hexstr[0];
1413         if ('0' <= hi && hi <= '9') {
1414                 hi -= '0';
1415         } else
1416                 if ('a' <= hi && hi <= 'f') {
1417                         hi -= ('a' - 10);
1418                 } else
1419                         if ('A' <= hi && hi <= 'F') {
1420                                 hi -= ('A' - 10);
1421                         }
1422
1423         lo = hexstr[1];
1424         if ('0' <= lo && lo <= '9') {
1425                 lo -= '0';
1426         } else
1427                 if ('a' <= lo && lo <= 'f') {
1428                         lo -= ('a'-10);
1429                 } else
1430                         if ('A' <= lo && lo <= 'F') {
1431                                 lo -= ('A' - 10);
1432                         }
1433         result = lo + (16 * hi);
1434         return result;
1435 }
1436
1437 gboolean is_uri_string(const gchar *str)
1438 {
1439         while (str && *str && g_ascii_isspace(*str))
1440                 str++;
1441         return (g_ascii_strncasecmp(str, "http://", 7) == 0 ||
1442                 g_ascii_strncasecmp(str, "https://", 8) == 0 ||
1443                 g_ascii_strncasecmp(str, "ftp://", 6) == 0 ||
1444                 g_ascii_strncasecmp(str, "www.", 4) == 0);
1445 }
1446
1447 gchar *get_uri_path(const gchar *uri)
1448 {
1449         while (uri && *uri && g_ascii_isspace(*uri))
1450                 uri++;
1451         if (g_ascii_strncasecmp(uri, "http://", 7) == 0)
1452                 return (gchar *)(uri + 7);
1453         else if (g_ascii_strncasecmp(uri, "https://", 8) == 0)
1454                 return (gchar *)(uri + 8);
1455         else if (g_ascii_strncasecmp(uri, "ftp://", 6) == 0)
1456                 return (gchar *)(uri + 6);
1457         else
1458                 return (gchar *)uri;
1459 }
1460
1461 gint get_uri_len(const gchar *str)
1462 {
1463         const gchar *p;
1464
1465         if (is_uri_string(str)) {
1466                 for (p = str; *p != '\0'; p++) {
1467                         if (!g_ascii_isgraph(*p) || strchr("()<>\"", *p))
1468                                 break;
1469                 }
1470                 return p - str;
1471         }
1472
1473         return 0;
1474 }
1475
1476 /* Decodes URL-Encoded strings (i.e. strings in which spaces are replaced by
1477  * plusses, and escape characters are used)
1478  */
1479 void decode_uri_with_plus(gchar *decoded_uri, const gchar *encoded_uri, gboolean with_plus)
1480 {
1481         gchar *dec = decoded_uri;
1482         const gchar *enc = encoded_uri;
1483
1484         while (*enc) {
1485                 if (*enc == '%') {
1486                         enc++;
1487                         if (isxdigit((guchar)enc[0]) &&
1488                             isxdigit((guchar)enc[1])) {
1489                                 *dec = axtoi(enc);
1490                                 dec++;
1491                                 enc += 2;
1492                         }
1493                 } else {
1494                         if (with_plus && *enc == '+')
1495                                 *dec = ' ';
1496                         else
1497                                 *dec = *enc;
1498                         dec++;
1499                         enc++;
1500                 }
1501         }
1502
1503         *dec = '\0';
1504 }
1505
1506 void decode_uri(gchar *decoded_uri, const gchar *encoded_uri)
1507 {
1508         decode_uri_with_plus(decoded_uri, encoded_uri, TRUE);
1509 }
1510
1511 static gchar *decode_uri_gdup(const gchar *encoded_uri)
1512 {
1513     gchar *buffer = g_malloc(strlen(encoded_uri)+1);
1514     decode_uri_with_plus(buffer, encoded_uri, FALSE);
1515     return buffer;
1516 }
1517
1518 gint scan_mailto_url(const gchar *mailto, gchar **from, gchar **to, gchar **cc, gchar **bcc,
1519                      gchar **subject, gchar **body, gchar ***attach, gchar **inreplyto)
1520 {
1521         gchar *tmp_mailto;
1522         gchar *p;
1523         const gchar *forbidden_uris[] = { ".gnupg/",
1524                                           "/etc/passwd",
1525                                           "/etc/shadow",
1526                                           ".ssh/",
1527                                           "../",
1528                                           NULL };
1529         gint num_attach = 0;
1530         gchar **my_att = NULL;
1531
1532         Xstrdup_a(tmp_mailto, mailto, return -1);
1533
1534         if (!strncmp(tmp_mailto, "mailto:", 7))
1535                 tmp_mailto += 7;
1536
1537         p = strchr(tmp_mailto, '?');
1538         if (p) {
1539                 *p = '\0';
1540                 p++;
1541         }
1542
1543         if (to && !*to)
1544                 *to = decode_uri_gdup(tmp_mailto);
1545
1546         my_att = g_malloc(sizeof(char *));
1547         my_att[0] = NULL;
1548
1549         while (p) {
1550                 gchar *field, *value;
1551
1552                 field = p;
1553
1554                 p = strchr(p, '=');
1555                 if (!p) break;
1556                 *p = '\0';
1557                 p++;
1558
1559                 value = p;
1560
1561                 p = strchr(p, '&');
1562                 if (p) {
1563                         *p = '\0';
1564                         p++;
1565                 }
1566
1567                 if (*value == '\0') continue;
1568
1569                 if (from && !g_ascii_strcasecmp(field, "from")) {
1570                         if (!*from) {
1571                                 *from = decode_uri_gdup(value);
1572                         } else {
1573                                 gchar *tmp = decode_uri_gdup(value);
1574                                 gchar *new_from = g_strdup_printf("%s, %s", *from, tmp);
1575                                 g_free(*from);
1576                                 *from = new_from;
1577                         }
1578                 } else if (cc && !g_ascii_strcasecmp(field, "cc")) {
1579                         if (!*cc) {
1580                                 *cc = decode_uri_gdup(value);
1581                         } else {
1582                                 gchar *tmp = decode_uri_gdup(value);
1583                                 gchar *new_cc = g_strdup_printf("%s, %s", *cc, tmp);
1584                                 g_free(*cc);
1585                                 *cc = new_cc;
1586                         }
1587                 } else if (bcc && !g_ascii_strcasecmp(field, "bcc")) {
1588                         if (!*bcc) {
1589                                 *bcc = decode_uri_gdup(value);
1590                         } else {
1591                                 gchar *tmp = decode_uri_gdup(value);
1592                                 gchar *new_bcc = g_strdup_printf("%s, %s", *bcc, tmp);
1593                                 g_free(*bcc);
1594                                 *bcc = new_bcc;
1595                         }
1596                 } else if (subject && !*subject &&
1597                            !g_ascii_strcasecmp(field, "subject")) {
1598                         *subject = decode_uri_gdup(value);
1599                 } else if (body && !*body && !g_ascii_strcasecmp(field, "body")) {
1600                         *body = decode_uri_gdup(value);
1601                 } else if (body && !*body && !g_ascii_strcasecmp(field, "insert")) {
1602                         gchar *tmp = decode_uri_gdup(value);
1603                         if (!g_file_get_contents(tmp, body, NULL, NULL)) {
1604                                 g_warning("couldn't set insert file '%s' in body", value);
1605                         }
1606                         g_free(tmp);
1607                 } else if (attach && !g_ascii_strcasecmp(field, "attach")) {
1608                         int i = 0;
1609                         gchar *tmp = decode_uri_gdup(value);
1610                         for (; forbidden_uris[i]; i++) {
1611                                 if (strstr(tmp, forbidden_uris[i])) {
1612                                         g_print("Refusing to attach '%s', potential private data leak\n",
1613                                                         tmp);
1614                                         g_free(tmp);
1615                                         break;
1616                                 }
1617                         }
1618                         if (tmp) {
1619                                 /* attach is correct */
1620                                 num_attach++;
1621                                 my_att = g_realloc(my_att, (sizeof(char *))*(num_attach+1));
1622                                 my_att[num_attach-1] = tmp;
1623                                 my_att[num_attach] = NULL;
1624                         }
1625                 } else if (inreplyto && !*inreplyto &&
1626                            !g_ascii_strcasecmp(field, "in-reply-to")) {
1627                         *inreplyto = decode_uri_gdup(value);
1628                 }
1629         }
1630
1631         if (attach)
1632                 *attach = my_att;
1633         return 0;
1634 }
1635
1636
1637 #ifdef G_OS_WIN32
1638 #include <windows.h>
1639 #ifndef CSIDL_APPDATA
1640 #define CSIDL_APPDATA 0x001a
1641 #endif
1642 #ifndef CSIDL_LOCAL_APPDATA
1643 #define CSIDL_LOCAL_APPDATA 0x001c
1644 #endif
1645 #ifndef CSIDL_FLAG_CREATE
1646 #define CSIDL_FLAG_CREATE 0x8000
1647 #endif
1648 #define DIM(v)               (sizeof(v)/sizeof((v)[0]))
1649
1650 #define RTLD_LAZY 0
1651 const char *
1652 w32_strerror (int w32_errno)
1653 {
1654   static char strerr[256];
1655   int ec = (int)GetLastError ();
1656
1657   if (w32_errno == 0)
1658     w32_errno = ec;
1659   FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, w32_errno,
1660                  MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
1661                  strerr, DIM (strerr)-1, NULL);
1662   return strerr;
1663 }
1664
1665 static __inline__ void *
1666 dlopen (const char * name, int flag)
1667 {
1668   void * hd = LoadLibrary (name);
1669   return hd;
1670 }
1671
1672 static __inline__ void *
1673 dlsym (void * hd, const char * sym)
1674 {
1675   if (hd && sym)
1676     {
1677       void * fnc = GetProcAddress (hd, sym);
1678       if (!fnc)
1679         return NULL;
1680       return fnc;
1681     }
1682   return NULL;
1683 }
1684
1685
1686 static __inline__ const char *
1687 dlerror (void)
1688 {
1689   return w32_strerror (0);
1690 }
1691
1692
1693 static __inline__ int
1694 dlclose (void * hd)
1695 {
1696   if (hd)
1697     {
1698       FreeLibrary (hd);
1699       return 0;
1700     }
1701   return -1;
1702 }
1703
1704 static HRESULT
1705 w32_shgetfolderpath (HWND a, int b, HANDLE c, DWORD d, LPSTR e)
1706 {
1707   static int initialized;
1708   static HRESULT (WINAPI * func)(HWND,int,HANDLE,DWORD,LPSTR);
1709
1710   if (!initialized)
1711     {
1712       static char *dllnames[] = { "shell32.dll", "shfolder.dll", NULL };
1713       void *handle;
1714       int i;
1715
1716       initialized = 1;
1717
1718       for (i=0, handle = NULL; !handle && dllnames[i]; i++)
1719         {
1720           handle = dlopen (dllnames[i], RTLD_LAZY);
1721           if (handle)
1722             {
1723               func = dlsym (handle, "SHGetFolderPathW");
1724               if (!func)
1725                 {
1726                   dlclose (handle);
1727                   handle = NULL;
1728                 }
1729             }
1730         }
1731     }
1732
1733   if (func)
1734     return func (a,b,c,d,e);
1735   else
1736     return -1;
1737 }
1738
1739 /* Returns a static string with the directroy from which the module
1740    has been loaded.  Returns an empty string on error. */
1741 static char *w32_get_module_dir(void)
1742 {
1743         static char *moddir;
1744
1745         if (!moddir) {
1746                 char name[MAX_PATH+10];
1747                 char *p;
1748
1749                 if ( !GetModuleFileNameA (0, name, sizeof (name)-10) )
1750                         *name = 0;
1751                 else {
1752                         p = strrchr (name, '\\');
1753                         if (p)
1754                                 *p = 0;
1755                         else
1756                                 *name = 0;
1757                 }
1758                 moddir = g_strdup (name);
1759         }
1760         return moddir;
1761 }
1762 #endif /* G_OS_WIN32 */
1763
1764 /* Return a static string with the locale dir. */
1765 const gchar *get_locale_dir(void)
1766 {
1767         static gchar *loc_dir;
1768
1769 #ifdef G_OS_WIN32
1770         if (!loc_dir)
1771                 loc_dir = g_strconcat(w32_get_module_dir(), G_DIR_SEPARATOR_S,
1772                                       "\\share\\locale", NULL);
1773 #endif
1774         if (!loc_dir)
1775                 loc_dir = LOCALEDIR;
1776
1777         return loc_dir;
1778 }
1779
1780
1781 const gchar *get_home_dir(void)
1782 {
1783 #ifdef G_OS_WIN32
1784         static char home_dir_utf16[MAX_PATH] = "";
1785         static gchar *home_dir_utf8 = NULL;
1786         if (home_dir_utf16[0] == '\0') {
1787                 if (w32_shgetfolderpath
1788                             (NULL, CSIDL_APPDATA|CSIDL_FLAG_CREATE,
1789                              NULL, 0, home_dir_utf16) < 0)
1790                                 strcpy (home_dir_utf16, "C:\\Claws Mail");
1791                 home_dir_utf8 = g_utf16_to_utf8 ((const gunichar2 *)home_dir_utf16, -1, NULL, NULL, NULL);
1792         }
1793         return home_dir_utf8;
1794 #else
1795         static const gchar *homeenv = NULL;
1796
1797         if (homeenv)
1798                 return homeenv;
1799
1800         if (!homeenv && g_getenv("HOME") != NULL)
1801                 homeenv = g_strdup(g_getenv("HOME"));
1802         if (!homeenv)
1803                 homeenv = g_get_home_dir();
1804
1805         return homeenv;
1806 #endif
1807 }
1808
1809 static gchar *claws_rc_dir = NULL;
1810 static gboolean rc_dir_alt = FALSE;
1811 const gchar *get_rc_dir(void)
1812 {
1813
1814         if (!claws_rc_dir) {
1815                 claws_rc_dir = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1816                                      RC_DIR, NULL);
1817                 debug_print("using default rc_dir %s\n", claws_rc_dir);
1818         }
1819         return claws_rc_dir;
1820 }
1821
1822 void set_rc_dir(const gchar *dir)
1823 {
1824         gchar *canonical_dir;
1825         if (claws_rc_dir != NULL) {
1826                 g_print("Error: rc_dir already set\n");
1827         } else {
1828                 int err = cm_canonicalize_filename(dir, &canonical_dir);
1829                 int len;
1830
1831                 if (err) {
1832                         g_print("Error looking for %s: %d(%s)\n",
1833                                 dir, -err, g_strerror(-err));
1834                         exit(0);
1835                 }
1836                 rc_dir_alt = TRUE;
1837
1838                 claws_rc_dir = canonical_dir;
1839
1840                 len = strlen(claws_rc_dir);
1841                 if (claws_rc_dir[len - 1] == G_DIR_SEPARATOR)
1842                         claws_rc_dir[len - 1] = '\0';
1843
1844                 debug_print("set rc_dir to %s\n", claws_rc_dir);
1845                 if (!is_dir_exist(claws_rc_dir)) {
1846                         if (make_dir_hier(claws_rc_dir) != 0) {
1847                                 g_print("Error: can't create %s\n",
1848                                 claws_rc_dir);
1849                                 exit(0);
1850                         }
1851                 }
1852         }
1853 }
1854
1855 gboolean rc_dir_is_alt(void) {
1856         return rc_dir_alt;
1857 }
1858
1859 const gchar *get_mail_base_dir(void)
1860 {
1861         return get_home_dir();
1862 }
1863
1864 const gchar *get_news_cache_dir(void)
1865 {
1866         static gchar *news_cache_dir = NULL;
1867         if (!news_cache_dir)
1868                 news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1869                                              NEWS_CACHE_DIR, NULL);
1870
1871         return news_cache_dir;
1872 }
1873
1874 const gchar *get_imap_cache_dir(void)
1875 {
1876         static gchar *imap_cache_dir = NULL;
1877
1878         if (!imap_cache_dir)
1879                 imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1880                                              IMAP_CACHE_DIR, NULL);
1881
1882         return imap_cache_dir;
1883 }
1884
1885 const gchar *get_mime_tmp_dir(void)
1886 {
1887         static gchar *mime_tmp_dir = NULL;
1888
1889         if (!mime_tmp_dir)
1890                 mime_tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1891                                            MIME_TMP_DIR, NULL);
1892
1893         return mime_tmp_dir;
1894 }
1895
1896 const gchar *get_template_dir(void)
1897 {
1898         static gchar *template_dir = NULL;
1899
1900         if (!template_dir)
1901                 template_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1902                                            TEMPLATE_DIR, NULL);
1903
1904         return template_dir;
1905 }
1906
1907 #ifdef G_OS_WIN32
1908 const gchar *w32_get_cert_file(void)
1909 {
1910         const gchar *cert_file = NULL;
1911         if (!cert_file)
1912                 cert_file = g_strconcat(w32_get_module_dir(),
1913                                  "\\share\\claws-mail\\",
1914                                 "ca-certificates.crt",
1915                                 NULL);
1916         return cert_file;
1917 }
1918 #endif
1919
1920 /* Return the filepath of the claws-mail.desktop file */
1921 const gchar *get_desktop_file(void)
1922 {
1923 #ifdef DESKTOPFILEPATH
1924   return DESKTOPFILEPATH;
1925 #else
1926   return NULL;
1927 #endif
1928 }
1929
1930 /* Return the default directory for Plugins. */
1931 const gchar *get_plugin_dir(void)
1932 {
1933 #ifdef G_OS_WIN32
1934         static gchar *plugin_dir = NULL;
1935
1936         if (!plugin_dir)
1937                 plugin_dir = g_strconcat(w32_get_module_dir(),
1938                                          "\\lib\\claws-mail\\plugins\\",
1939                                          NULL);
1940         return plugin_dir;
1941 #else
1942         if (is_dir_exist(PLUGINDIR))
1943                 return PLUGINDIR;
1944         else {
1945                 static gchar *plugin_dir = NULL;
1946                 if (!plugin_dir)
1947                         plugin_dir = g_strconcat(get_rc_dir(),
1948                                 G_DIR_SEPARATOR_S, "plugins",
1949                                 G_DIR_SEPARATOR_S, NULL);
1950                 return plugin_dir;
1951         }
1952 #endif
1953 }
1954
1955
1956 #ifdef G_OS_WIN32
1957 /* Return the default directory for Themes. */
1958 const gchar *w32_get_themes_dir(void)
1959 {
1960         static gchar *themes_dir = NULL;
1961
1962         if (!themes_dir)
1963                 themes_dir = g_strconcat(w32_get_module_dir(),
1964                                          "\\share\\claws-mail\\themes",
1965                                          NULL);
1966         return themes_dir;
1967 }
1968 #endif
1969
1970 const gchar *get_tmp_dir(void)
1971 {
1972         static gchar *tmp_dir = NULL;
1973
1974         if (!tmp_dir)
1975                 tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1976                                       TMP_DIR, NULL);
1977
1978         return tmp_dir;
1979 }
1980
1981 gchar *get_tmp_file(void)
1982 {
1983         gchar *tmp_file;
1984         static guint32 id = 0;
1985
1986         tmp_file = g_strdup_printf("%s%ctmpfile.%08x",
1987                                    get_tmp_dir(), G_DIR_SEPARATOR, id++);
1988
1989         return tmp_file;
1990 }
1991
1992 const gchar *get_domain_name(void)
1993 {
1994 #ifdef G_OS_UNIX
1995         static gchar *domain_name = NULL;
1996         struct addrinfo hints, *res;
1997         char hostname[256];
1998         int s;
1999
2000         if (!domain_name) {
2001                 if (gethostname(hostname, sizeof(hostname)) != 0) {
2002                         perror("gethostname");
2003                         domain_name = "localhost";
2004                 } else {
2005                         memset(&hints, 0, sizeof(struct addrinfo));
2006                         hints.ai_family = AF_UNSPEC;
2007                         hints.ai_socktype = 0;
2008                         hints.ai_flags = AI_CANONNAME;
2009                         hints.ai_protocol = 0;
2010
2011                         s = getaddrinfo(hostname, NULL, &hints, &res);
2012                         if (s != 0) {
2013                                 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
2014                                 domain_name = g_strdup(hostname);
2015                         } else {
2016                                 domain_name = g_strdup(res->ai_canonname);
2017                                 freeaddrinfo(res);
2018                         }
2019                 }
2020                 debug_print("domain name = %s\n", domain_name);
2021         }
2022
2023         return domain_name;
2024 #else
2025         return "localhost";
2026 #endif
2027 }
2028
2029 off_t get_file_size(const gchar *file)
2030 {
2031         GStatBuf s;
2032
2033         if (g_stat(file, &s) < 0) {
2034                 FILE_OP_ERROR(file, "stat");
2035                 return -1;
2036         }
2037
2038         return s.st_size;
2039 }
2040
2041 time_t get_file_mtime(const gchar *file)
2042 {
2043         GStatBuf s;
2044
2045         if (g_stat(file, &s) < 0) {
2046                 FILE_OP_ERROR(file, "stat");
2047                 return -1;
2048         }
2049
2050         return s.st_mtime;
2051 }
2052
2053 gboolean file_exist(const gchar *file, gboolean allow_fifo)
2054 {
2055         GStatBuf s;
2056
2057         if (file == NULL)
2058                 return FALSE;
2059
2060         if (g_stat(file, &s) < 0) {
2061                 if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
2062                 return FALSE;
2063         }
2064
2065         if (S_ISREG(s.st_mode) || (allow_fifo && S_ISFIFO(s.st_mode)))
2066                 return TRUE;
2067
2068         return FALSE;
2069 }
2070
2071
2072 /* Test on whether FILE is a relative file name. This is
2073  * straightforward for Unix but more complex for Windows. */
2074 gboolean is_relative_filename(const gchar *file)
2075 {
2076         if (!file)
2077                 return TRUE;
2078 #ifdef G_OS_WIN32
2079         if ( *file == '\\' && file[1] == '\\' && strchr (file+2, '\\') )
2080                 return FALSE; /* Prefixed with a hostname - this can't
2081                                * be a relative name. */
2082
2083         if ( ((*file >= 'a' && *file <= 'z')
2084               || (*file >= 'A' && *file <= 'Z'))
2085              && file[1] == ':')
2086                 file += 2;  /* Skip drive letter. */
2087
2088         return !(*file == '\\' || *file == '/');
2089 #else
2090         return !(*file == G_DIR_SEPARATOR);
2091 #endif
2092 }
2093
2094
2095 gboolean is_dir_exist(const gchar *dir)
2096 {
2097         if (dir == NULL)
2098                 return FALSE;
2099
2100         return g_file_test(dir, G_FILE_TEST_IS_DIR);
2101 }
2102
2103 gboolean is_file_entry_exist(const gchar *file)
2104 {
2105         if (file == NULL)
2106                 return FALSE;
2107
2108         return g_file_test(file, G_FILE_TEST_EXISTS);
2109 }
2110
2111 gboolean dirent_is_regular_file(struct dirent *d)
2112 {
2113 #if !defined(G_OS_WIN32) && defined(HAVE_DIRENT_D_TYPE)
2114         if (d->d_type == DT_REG)
2115                 return TRUE;
2116         else if (d->d_type != DT_UNKNOWN)
2117                 return FALSE;
2118 #endif
2119
2120         return g_file_test(d->d_name, G_FILE_TEST_IS_REGULAR);
2121 }
2122
2123 gint change_dir(const gchar *dir)
2124 {
2125         gchar *prevdir = NULL;
2126
2127         if (debug_mode)
2128                 prevdir = g_get_current_dir();
2129
2130         if (g_chdir(dir) < 0) {
2131                 FILE_OP_ERROR(dir, "chdir");
2132                 if (debug_mode) g_free(prevdir);
2133                 return -1;
2134         } else if (debug_mode) {
2135                 gchar *cwd;
2136
2137                 cwd = g_get_current_dir();
2138                 if (strcmp(prevdir, cwd) != 0)
2139                         g_print("current dir: %s\n", cwd);
2140                 g_free(cwd);
2141                 g_free(prevdir);
2142         }
2143
2144         return 0;
2145 }
2146
2147 gint make_dir(const gchar *dir)
2148 {
2149         if (g_mkdir(dir, S_IRWXU) < 0) {
2150                 FILE_OP_ERROR(dir, "mkdir");
2151                 return -1;
2152         }
2153         if (g_chmod(dir, S_IRWXU) < 0)
2154                 FILE_OP_ERROR(dir, "chmod");
2155
2156         return 0;
2157 }
2158
2159 gint make_dir_hier(const gchar *dir)
2160 {
2161         gchar *parent_dir;
2162         const gchar *p;
2163
2164         for (p = dir; (p = strchr(p, G_DIR_SEPARATOR)) != NULL; p++) {
2165                 parent_dir = g_strndup(dir, p - dir);
2166                 if (*parent_dir != '\0') {
2167                         if (!is_dir_exist(parent_dir)) {
2168                                 if (make_dir(parent_dir) < 0) {
2169                                         g_free(parent_dir);
2170                                         return -1;
2171                                 }
2172                         }
2173                 }
2174                 g_free(parent_dir);
2175         }
2176
2177         if (!is_dir_exist(dir)) {
2178                 if (make_dir(dir) < 0)
2179                         return -1;
2180         }
2181
2182         return 0;
2183 }
2184
2185 gint remove_all_files(const gchar *dir)
2186 {
2187         GDir *dp;
2188         const gchar *file_name;
2189         gchar *tmp;
2190
2191         if ((dp = g_dir_open(dir, 0, NULL)) == NULL) {
2192                 g_warning("failed to open directory: %s", dir);
2193                 return -1;
2194         }
2195
2196         while ((file_name = g_dir_read_name(dp)) != NULL) {
2197                 tmp = g_strconcat(dir, G_DIR_SEPARATOR_S, file_name, NULL);
2198                 if (claws_unlink(tmp) < 0)
2199                         FILE_OP_ERROR(tmp, "unlink");
2200                 g_free(tmp);
2201         }
2202
2203         g_dir_close(dp);
2204
2205         return 0;
2206 }
2207
2208 gint remove_numbered_files(const gchar *dir, guint first, guint last)
2209 {
2210         GDir *dp;
2211         const gchar *dir_name;
2212         gchar *prev_dir;
2213         gint file_no;
2214
2215         if (first == last) {
2216                 /* Skip all the dir reading part. */
2217                 gchar *filename = g_strdup_printf("%s%s%u", dir, G_DIR_SEPARATOR_S, first);
2218                 if (is_dir_exist(filename)) {
2219                         /* a numbered directory with this name exists,
2220                          * remove the dot-file instead */
2221                         g_free(filename);
2222                         filename = g_strdup_printf("%s%s.%u", dir, G_DIR_SEPARATOR_S, first);
2223                 }
2224                 if (claws_unlink(filename) < 0) {
2225                         FILE_OP_ERROR(filename, "unlink");
2226                         g_free(filename);
2227                         return -1;
2228                 }
2229                 g_free(filename);
2230                 return 0;
2231         }
2232
2233         prev_dir = g_get_current_dir();
2234
2235         if (g_chdir(dir) < 0) {
2236                 FILE_OP_ERROR(dir, "chdir");
2237                 g_free(prev_dir);
2238                 return -1;
2239         }
2240
2241         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2242                 g_warning("failed to open directory: %s", dir);
2243                 g_free(prev_dir);
2244                 return -1;
2245         }
2246
2247         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2248                 file_no = to_number(dir_name);
2249                 if (file_no > 0 && first <= file_no && file_no <= last) {
2250                         if (is_dir_exist(dir_name)) {
2251                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2252                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2253                                         FILE_OP_ERROR(dot_file, "unlink");
2254                                 }
2255                                 g_free(dot_file);
2256                                 continue;
2257                         }
2258                         if (claws_unlink(dir_name) < 0)
2259                                 FILE_OP_ERROR(dir_name, "unlink");
2260                 }
2261         }
2262
2263         g_dir_close(dp);
2264
2265         if (g_chdir(prev_dir) < 0) {
2266                 FILE_OP_ERROR(prev_dir, "chdir");
2267                 g_free(prev_dir);
2268                 return -1;
2269         }
2270
2271         g_free(prev_dir);
2272
2273         return 0;
2274 }
2275
2276 gint remove_numbered_files_not_in_list(const gchar *dir, GSList *numberlist)
2277 {
2278         GDir *dp;
2279         const gchar *dir_name;
2280         gchar *prev_dir;
2281         gint file_no;
2282         GHashTable *wanted_files;
2283         GSList *cur;
2284         GError *error = NULL;
2285
2286         if (numberlist == NULL)
2287             return 0;
2288
2289         prev_dir = g_get_current_dir();
2290
2291         if (g_chdir(dir) < 0) {
2292                 FILE_OP_ERROR(dir, "chdir");
2293                 g_free(prev_dir);
2294                 return -1;
2295         }
2296
2297         if ((dp = g_dir_open(".", 0, &error)) == NULL) {
2298                 g_message("Couldn't open current directory: %s (%d).\n",
2299                                 error->message, error->code);
2300                 g_error_free(error);
2301                 g_free(prev_dir);
2302                 return -1;
2303         }
2304
2305         wanted_files = g_hash_table_new(g_direct_hash, g_direct_equal);
2306         for (cur = numberlist; cur != NULL; cur = cur->next) {
2307                 /* numberlist->data is expected to be GINT_TO_POINTER */
2308                 g_hash_table_insert(wanted_files, cur->data, GINT_TO_POINTER(1));
2309         }
2310
2311         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2312                 file_no = to_number(dir_name);
2313                 if (is_dir_exist(dir_name))
2314                         continue;
2315                 if (file_no > 0 && g_hash_table_lookup(wanted_files, GINT_TO_POINTER(file_no)) == NULL) {
2316                         debug_print("removing unwanted file %d from %s\n", file_no, dir);
2317                         if (is_dir_exist(dir_name)) {
2318                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2319                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2320                                         FILE_OP_ERROR(dot_file, "unlink");
2321                                 }
2322                                 g_free(dot_file);
2323                                 continue;
2324                         }
2325                         if (claws_unlink(dir_name) < 0)
2326                                 FILE_OP_ERROR(dir_name, "unlink");
2327                 }
2328         }
2329
2330         g_dir_close(dp);
2331         g_hash_table_destroy(wanted_files);
2332
2333         if (g_chdir(prev_dir) < 0) {
2334                 FILE_OP_ERROR(prev_dir, "chdir");
2335                 g_free(prev_dir);
2336                 return -1;
2337         }
2338
2339         g_free(prev_dir);
2340
2341         return 0;
2342 }
2343
2344 gint remove_all_numbered_files(const gchar *dir)
2345 {
2346         return remove_numbered_files(dir, 0, UINT_MAX);
2347 }
2348
2349 gint remove_dir_recursive(const gchar *dir)
2350 {
2351         GStatBuf s;
2352         GDir *dp;
2353         const gchar *dir_name;
2354         gchar *prev_dir;
2355
2356         if (g_stat(dir, &s) < 0) {
2357                 FILE_OP_ERROR(dir, "stat");
2358                 if (ENOENT == errno) return 0;
2359                 return -(errno);
2360         }
2361
2362         if (!S_ISDIR(s.st_mode)) {
2363                 if (claws_unlink(dir) < 0) {
2364                         FILE_OP_ERROR(dir, "unlink");
2365                         return -(errno);
2366                 }
2367
2368                 return 0;
2369         }
2370
2371         prev_dir = g_get_current_dir();
2372         /* g_print("prev_dir = %s\n", prev_dir); */
2373
2374         if (!path_cmp(prev_dir, dir)) {
2375                 g_free(prev_dir);
2376                 if (g_chdir("..") < 0) {
2377                         FILE_OP_ERROR(dir, "chdir");
2378                         return -(errno);
2379                 }
2380                 prev_dir = g_get_current_dir();
2381         }
2382
2383         if (g_chdir(dir) < 0) {
2384                 FILE_OP_ERROR(dir, "chdir");
2385                 g_free(prev_dir);
2386                 return -(errno);
2387         }
2388
2389         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2390                 g_warning("failed to open directory: %s", dir);
2391                 g_chdir(prev_dir);
2392                 g_free(prev_dir);
2393                 return -(errno);
2394         }
2395
2396         /* remove all files in the directory */
2397         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2398                 /* g_print("removing %s\n", dir_name); */
2399
2400                 if (is_dir_exist(dir_name)) {
2401                         gint ret;
2402
2403                         if ((ret = remove_dir_recursive(dir_name)) < 0) {
2404                                 g_warning("can't remove directory: %s", dir_name);
2405                                 return ret;
2406                         }
2407                 } else {
2408                         if (claws_unlink(dir_name) < 0)
2409                                 FILE_OP_ERROR(dir_name, "unlink");
2410                 }
2411         }
2412
2413         g_dir_close(dp);
2414
2415         if (g_chdir(prev_dir) < 0) {
2416                 FILE_OP_ERROR(prev_dir, "chdir");
2417                 g_free(prev_dir);
2418                 return -(errno);
2419         }
2420
2421         g_free(prev_dir);
2422
2423         if (g_rmdir(dir) < 0) {
2424                 FILE_OP_ERROR(dir, "rmdir");
2425                 return -(errno);
2426         }
2427
2428         return 0;
2429 }
2430
2431 gint rename_force(const gchar *oldpath, const gchar *newpath)
2432 {
2433 #ifndef G_OS_UNIX
2434         if (!is_file_entry_exist(oldpath)) {
2435                 errno = ENOENT;
2436                 return -1;
2437         }
2438         if (is_file_exist(newpath)) {
2439                 if (claws_unlink(newpath) < 0)
2440                         FILE_OP_ERROR(newpath, "unlink");
2441         }
2442 #endif
2443         return g_rename(oldpath, newpath);
2444 }
2445
2446 /*
2447  * Append src file body to the tail of dest file.
2448  * Now keep_backup has no effects.
2449  */
2450 gint append_file(const gchar *src, const gchar *dest, gboolean keep_backup)
2451 {
2452         FILE *src_fp, *dest_fp;
2453         gint n_read;
2454         gchar buf[BUFSIZ];
2455
2456         gboolean err = FALSE;
2457
2458         if ((src_fp = g_fopen(src, "rb")) == NULL) {
2459                 FILE_OP_ERROR(src, "g_fopen");
2460                 return -1;
2461         }
2462
2463         if ((dest_fp = g_fopen(dest, "ab")) == NULL) {
2464                 FILE_OP_ERROR(dest, "g_fopen");
2465                 fclose(src_fp);
2466                 return -1;
2467         }
2468
2469         if (change_file_mode_rw(dest_fp, dest) < 0) {
2470                 FILE_OP_ERROR(dest, "chmod");
2471                 g_warning("can't change file mode: %s", dest);
2472         }
2473
2474         while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), src_fp)) > 0) {
2475                 if (n_read < sizeof(buf) && ferror(src_fp))
2476                         break;
2477                 if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
2478                         g_warning("writing to %s failed.", dest);
2479                         fclose(dest_fp);
2480                         fclose(src_fp);
2481                         claws_unlink(dest);
2482                         return -1;
2483                 }
2484         }
2485
2486         if (ferror(src_fp)) {
2487                 FILE_OP_ERROR(src, "fread");
2488                 err = TRUE;
2489         }
2490         fclose(src_fp);
2491         if (fclose(dest_fp) == EOF) {
2492                 FILE_OP_ERROR(dest, "fclose");
2493                 err = TRUE;
2494         }
2495
2496         if (err) {
2497                 claws_unlink(dest);
2498                 return -1;
2499         }
2500
2501         return 0;
2502 }
2503
2504 gint copy_file(const gchar *src, const gchar *dest, gboolean keep_backup)
2505 {
2506         FILE *src_fp, *dest_fp;
2507         gint n_read;
2508         gchar buf[BUFSIZ];
2509         gchar *dest_bak = NULL;
2510         gboolean err = FALSE;
2511
2512         if ((src_fp = g_fopen(src, "rb")) == NULL) {
2513                 FILE_OP_ERROR(src, "g_fopen");
2514                 return -1;
2515         }
2516         if (is_file_exist(dest)) {
2517                 dest_bak = g_strconcat(dest, ".bak", NULL);
2518                 if (rename_force(dest, dest_bak) < 0) {
2519                         FILE_OP_ERROR(dest, "rename");
2520                         fclose(src_fp);
2521                         g_free(dest_bak);
2522                         return -1;
2523                 }
2524         }
2525
2526         if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
2527                 FILE_OP_ERROR(dest, "g_fopen");
2528                 fclose(src_fp);
2529                 if (dest_bak) {
2530                         if (rename_force(dest_bak, dest) < 0)
2531                                 FILE_OP_ERROR(dest_bak, "rename");
2532                         g_free(dest_bak);
2533                 }
2534                 return -1;
2535         }
2536
2537         if (change_file_mode_rw(dest_fp, dest) < 0) {
2538                 FILE_OP_ERROR(dest, "chmod");
2539                 g_warning("can't change file mode: %s", dest);
2540         }
2541
2542         while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), src_fp)) > 0) {
2543                 if (n_read < sizeof(buf) && ferror(src_fp))
2544                         break;
2545                 if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
2546                         g_warning("writing to %s failed.", dest);
2547                         fclose(dest_fp);
2548                         fclose(src_fp);
2549                         claws_unlink(dest);
2550                         if (dest_bak) {
2551                                 if (rename_force(dest_bak, dest) < 0)
2552                                         FILE_OP_ERROR(dest_bak, "rename");
2553                                 g_free(dest_bak);
2554                         }
2555                         return -1;
2556                 }
2557         }
2558
2559         if (ferror(src_fp)) {
2560                 FILE_OP_ERROR(src, "fread");
2561                 err = TRUE;
2562         }
2563         fclose(src_fp);
2564         if (fclose(dest_fp) == EOF) {
2565                 FILE_OP_ERROR(dest, "fclose");
2566                 err = TRUE;
2567         }
2568
2569         if (err) {
2570                 claws_unlink(dest);
2571                 if (dest_bak) {
2572                         if (rename_force(dest_bak, dest) < 0)
2573                                 FILE_OP_ERROR(dest_bak, "rename");
2574                         g_free(dest_bak);
2575                 }
2576                 return -1;
2577         }
2578
2579         if (keep_backup == FALSE && dest_bak)
2580                 claws_unlink(dest_bak);
2581
2582         g_free(dest_bak);
2583
2584         return 0;
2585 }
2586
2587 gint move_file(const gchar *src, const gchar *dest, gboolean overwrite)
2588 {
2589         if (overwrite == FALSE && is_file_exist(dest)) {
2590                 g_warning("move_file(): file %s already exists.", dest);
2591                 return -1;
2592         }
2593
2594         if (rename_force(src, dest) == 0) return 0;
2595
2596         if (EXDEV != errno) {
2597                 FILE_OP_ERROR(src, "rename");
2598                 return -1;
2599         }
2600
2601         if (copy_file(src, dest, FALSE) < 0) return -1;
2602
2603         claws_unlink(src);
2604
2605         return 0;
2606 }
2607
2608 gint copy_file_part_to_fp(FILE *fp, off_t offset, size_t length, FILE *dest_fp)
2609 {
2610         gint n_read;
2611         gint bytes_left, to_read;
2612         gchar buf[BUFSIZ];
2613
2614         if (fseek(fp, offset, SEEK_SET) < 0) {
2615                 perror("fseek");
2616                 return -1;
2617         }
2618
2619         bytes_left = length;
2620         to_read = MIN(bytes_left, sizeof(buf));
2621
2622         while ((n_read = fread(buf, sizeof(gchar), to_read, fp)) > 0) {
2623                 if (n_read < to_read && ferror(fp))
2624                         break;
2625                 if (fwrite(buf, 1, n_read, dest_fp) < n_read) {
2626                         return -1;
2627                 }
2628                 bytes_left -= n_read;
2629                 if (bytes_left == 0)
2630                         break;
2631                 to_read = MIN(bytes_left, sizeof(buf));
2632         }
2633
2634         if (ferror(fp)) {
2635                 perror("fread");
2636                 return -1;
2637         }
2638
2639         return 0;
2640 }
2641
2642 gint copy_file_part(FILE *fp, off_t offset, size_t length, const gchar *dest)
2643 {
2644         FILE *dest_fp;
2645         gboolean err = FALSE;
2646
2647         if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
2648                 FILE_OP_ERROR(dest, "g_fopen");
2649                 return -1;
2650         }
2651
2652         if (change_file_mode_rw(dest_fp, dest) < 0) {
2653                 FILE_OP_ERROR(dest, "chmod");
2654                 g_warning("can't change file mode: %s", dest);
2655         }
2656
2657         if (copy_file_part_to_fp(fp, offset, length, dest_fp) < 0)
2658                 err = TRUE;
2659
2660         if (!err && fclose(dest_fp) == EOF) {
2661                 FILE_OP_ERROR(dest, "fclose");
2662                 err = TRUE;
2663         }
2664
2665         if (err) {
2666                 g_warning("writing to %s failed.", dest);
2667                 claws_unlink(dest);
2668                 return -1;
2669         }
2670
2671         return 0;
2672 }
2673
2674 /* convert line endings into CRLF. If the last line doesn't end with
2675  * linebreak, add it.
2676  */
2677 gchar *canonicalize_str(const gchar *str)
2678 {
2679         const gchar *p;
2680         guint new_len = 0;
2681         gchar *out, *outp;
2682
2683         for (p = str; *p != '\0'; ++p) {
2684                 if (*p != '\r') {
2685                         ++new_len;
2686                         if (*p == '\n')
2687                                 ++new_len;
2688                 }
2689         }
2690         if (p == str || *(p - 1) != '\n')
2691                 new_len += 2;
2692
2693         out = outp = g_malloc(new_len + 1);
2694         for (p = str; *p != '\0'; ++p) {
2695                 if (*p != '\r') {
2696                         if (*p == '\n')
2697                                 *outp++ = '\r';
2698                         *outp++ = *p;
2699                 }
2700         }
2701         if (p == str || *(p - 1) != '\n') {
2702                 *outp++ = '\r';
2703                 *outp++ = '\n';
2704         }
2705         *outp = '\0';
2706
2707         return out;
2708 }
2709
2710 gint canonicalize_file(const gchar *src, const gchar *dest)
2711 {
2712         FILE *src_fp, *dest_fp;
2713         gchar buf[BUFFSIZE];
2714         gint len;
2715         gboolean err = FALSE;
2716         gboolean last_linebreak = FALSE;
2717
2718         if (src == NULL || dest == NULL)
2719                 return -1;
2720
2721         if ((src_fp = g_fopen(src, "rb")) == NULL) {
2722                 FILE_OP_ERROR(src, "g_fopen");
2723                 return -1;
2724         }
2725
2726         if ((dest_fp = g_fopen(dest, "wb")) == NULL) {
2727                 FILE_OP_ERROR(dest, "g_fopen");
2728                 fclose(src_fp);
2729                 return -1;
2730         }
2731
2732         if (change_file_mode_rw(dest_fp, dest) < 0) {
2733                 FILE_OP_ERROR(dest, "chmod");
2734                 g_warning("can't change file mode: %s", dest);
2735         }
2736
2737         while (fgets(buf, sizeof(buf), src_fp) != NULL) {
2738                 gint r = 0;
2739
2740                 len = strlen(buf);
2741                 if (len == 0) break;
2742                 last_linebreak = FALSE;
2743
2744                 if (buf[len - 1] != '\n') {
2745                         last_linebreak = TRUE;
2746                         r = fputs(buf, dest_fp);
2747                 } else if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
2748                         r = fputs(buf, dest_fp);
2749                 } else {
2750                         if (len > 1) {
2751                                 r = fwrite(buf, 1, len - 1, dest_fp);
2752                                 if (r != (len -1))
2753                                         r = EOF;
2754                         }
2755                         if (r != EOF)
2756                                 r = fputs("\r\n", dest_fp);
2757                 }
2758
2759                 if (r == EOF) {
2760                         g_warning("writing to %s failed.", dest);
2761                         fclose(dest_fp);
2762                         fclose(src_fp);
2763                         claws_unlink(dest);
2764                         return -1;
2765                 }
2766         }
2767
2768         if (last_linebreak == TRUE) {
2769                 if (fputs("\r\n", dest_fp) == EOF)
2770                         err = TRUE;
2771         }
2772
2773         if (ferror(src_fp)) {
2774                 FILE_OP_ERROR(src, "fgets");
2775                 err = TRUE;
2776         }
2777         fclose(src_fp);
2778         if (fclose(dest_fp) == EOF) {
2779                 FILE_OP_ERROR(dest, "fclose");
2780                 err = TRUE;
2781         }
2782
2783         if (err) {
2784                 claws_unlink(dest);
2785                 return -1;
2786         }
2787
2788         return 0;
2789 }
2790
2791 gint canonicalize_file_replace(const gchar *file)
2792 {
2793         gchar *tmp_file;
2794
2795         tmp_file = get_tmp_file();
2796
2797         if (canonicalize_file(file, tmp_file) < 0) {
2798                 g_free(tmp_file);
2799                 return -1;
2800         }
2801
2802         if (move_file(tmp_file, file, TRUE) < 0) {
2803                 g_warning("can't replace file: %s", file);
2804                 claws_unlink(tmp_file);
2805                 g_free(tmp_file);
2806                 return -1;
2807         }
2808
2809         g_free(tmp_file);
2810         return 0;
2811 }
2812
2813 gchar *normalize_newlines(const gchar *str)
2814 {
2815         const gchar *p;
2816         gchar *out, *outp;
2817
2818         out = outp = g_malloc(strlen(str) + 1);
2819         for (p = str; *p != '\0'; ++p) {
2820                 if (*p == '\r') {
2821                         if (*(p + 1) != '\n')
2822                                 *outp++ = '\n';
2823                 } else
2824                         *outp++ = *p;
2825         }
2826
2827         *outp = '\0';
2828
2829         return out;
2830 }
2831
2832 gchar *get_outgoing_rfc2822_str(FILE *fp)
2833 {
2834         gchar buf[BUFFSIZE];
2835         GString *str;
2836         gchar *ret;
2837
2838         str = g_string_new(NULL);
2839
2840         /* output header part */
2841         while (fgets(buf, sizeof(buf), fp) != NULL) {
2842                 strretchomp(buf);
2843                 if (!g_ascii_strncasecmp(buf, "Bcc:", 4)) {
2844                         gint next;
2845
2846                         for (;;) {
2847                                 next = fgetc(fp);
2848                                 if (next == EOF)
2849                                         break;
2850                                 else if (next != ' ' && next != '\t') {
2851                                         ungetc(next, fp);
2852                                         break;
2853                                 }
2854                                 if (fgets(buf, sizeof(buf), fp) == NULL)
2855                                         break;
2856                         }
2857                 } else {
2858                         g_string_append(str, buf);
2859                         g_string_append(str, "\r\n");
2860                         if (buf[0] == '\0')
2861                                 break;
2862                 }
2863         }
2864
2865         /* output body part */
2866         while (fgets(buf, sizeof(buf), fp) != NULL) {
2867                 strretchomp(buf);
2868                 if (buf[0] == '.')
2869                         g_string_append_c(str, '.');
2870                 g_string_append(str, buf);
2871                 g_string_append(str, "\r\n");
2872         }
2873
2874         ret = str->str;
2875         g_string_free(str, FALSE);
2876
2877         return ret;
2878 }
2879
2880 /*
2881  * Create a new boundary in a way that it is very unlikely that this
2882  * will occur in the following text.  It would be easy to ensure
2883  * uniqueness if everything is either quoted-printable or base64
2884  * encoded (note that conversion is allowed), but because MIME bodies
2885  * may be nested, it may happen that the same boundary has already
2886  * been used.
2887  *
2888  *   boundary := 0*69<bchars> bcharsnospace
2889  *   bchars := bcharsnospace / " "
2890  *   bcharsnospace := DIGIT / ALPHA / "'" / "(" / ")" /
2891  *                  "+" / "_" / "," / "-" / "." /
2892  *                  "/" / ":" / "=" / "?"
2893  *
2894  * some special characters removed because of buggy MTAs
2895  */
2896
2897 gchar *generate_mime_boundary(const gchar *prefix)
2898 {
2899         static gchar tbl[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
2900                              "abcdefghijklmnopqrstuvwxyz"
2901                              "1234567890+_./=";
2902         gchar buf_uniq[24];
2903         gint i;
2904
2905         for (i = 0; i < sizeof(buf_uniq) - 1; i++)
2906                 buf_uniq[i] = tbl[g_random_int_range(0, sizeof(tbl) - 1)];
2907         buf_uniq[i] = '\0';
2908
2909         return g_strdup_printf("%s_/%s", prefix ? prefix : "MP",
2910                                buf_uniq);
2911 }
2912
2913 gint change_file_mode_rw(FILE *fp, const gchar *file)
2914 {
2915 #if HAVE_FCHMOD
2916         return fchmod(fileno(fp), S_IRUSR|S_IWUSR);
2917 #else
2918         return g_chmod(file, S_IRUSR|S_IWUSR);
2919 #endif
2920 }
2921
2922 FILE *my_tmpfile(void)
2923 {
2924         const gchar suffix[] = ".XXXXXX";
2925         const gchar *tmpdir;
2926         guint tmplen;
2927         const gchar *progname;
2928         guint proglen;
2929         gchar *fname;
2930         gint fd;
2931         FILE *fp;
2932 #ifndef G_OS_WIN32
2933         gchar buf[2]="\0";
2934 #endif
2935
2936         tmpdir = get_tmp_dir();
2937         tmplen = strlen(tmpdir);
2938         progname = g_get_prgname();
2939         if (progname == NULL)
2940                 progname = "claws-mail";
2941         proglen = strlen(progname);
2942         Xalloca(fname, tmplen + 1 + proglen + sizeof(suffix),
2943                 return tmpfile());
2944
2945         memcpy(fname, tmpdir, tmplen);
2946         fname[tmplen] = G_DIR_SEPARATOR;
2947         memcpy(fname + tmplen + 1, progname, proglen);
2948         memcpy(fname + tmplen + 1 + proglen, suffix, sizeof(suffix));
2949
2950         fd = g_mkstemp(fname);
2951         if (fd < 0)
2952                 return tmpfile();
2953
2954 #ifndef G_OS_WIN32
2955         claws_unlink(fname);
2956
2957         /* verify that we can write in the file after unlinking */
2958         if (write(fd, buf, 1) < 0) {
2959                 close(fd);
2960                 return tmpfile();
2961         }
2962
2963 #endif
2964
2965         fp = fdopen(fd, "w+b");
2966         if (!fp)
2967                 close(fd);
2968         else {
2969                 rewind(fp);
2970                 return fp;
2971         }
2972
2973         return tmpfile();
2974 }
2975
2976 FILE *get_tmpfile_in_dir(const gchar *dir, gchar **filename)
2977 {
2978         int fd;
2979         *filename = g_strdup_printf("%s%cclaws.XXXXXX", dir, G_DIR_SEPARATOR);
2980         fd = g_mkstemp(*filename);
2981         if (fd < 0)
2982                 return NULL;
2983         return fdopen(fd, "w+");
2984 }
2985
2986 FILE *str_open_as_stream(const gchar *str)
2987 {
2988         FILE *fp;
2989         size_t len;
2990
2991         cm_return_val_if_fail(str != NULL, NULL);
2992
2993         fp = my_tmpfile();
2994         if (!fp) {
2995                 FILE_OP_ERROR("str_open_as_stream", "my_tmpfile");
2996                 return NULL;
2997         }
2998
2999         len = strlen(str);
3000         if (len == 0) return fp;
3001
3002         if (fwrite(str, 1, len, fp) != len) {
3003                 FILE_OP_ERROR("str_open_as_stream", "fwrite");
3004                 fclose(fp);
3005                 return NULL;
3006         }
3007
3008         rewind(fp);
3009         return fp;
3010 }
3011
3012 gint str_write_to_file(const gchar *str, const gchar *file)
3013 {
3014         FILE *fp;
3015         size_t len;
3016
3017         cm_return_val_if_fail(str != NULL, -1);
3018         cm_return_val_if_fail(file != NULL, -1);
3019
3020         if ((fp = g_fopen(file, "wb")) == NULL) {
3021                 FILE_OP_ERROR(file, "g_fopen");
3022                 return -1;
3023         }
3024
3025         len = strlen(str);
3026         if (len == 0) {
3027                 fclose(fp);
3028                 return 0;
3029         }
3030
3031         if (fwrite(str, 1, len, fp) != len) {
3032                 FILE_OP_ERROR(file, "fwrite");
3033                 fclose(fp);
3034                 claws_unlink(file);
3035                 return -1;
3036         }
3037
3038         if (fclose(fp) == EOF) {
3039                 FILE_OP_ERROR(file, "fclose");
3040                 claws_unlink(file);
3041                 return -1;
3042         }
3043
3044         return 0;
3045 }
3046
3047 static gchar *file_read_stream_to_str_full(FILE *fp, gboolean recode)
3048 {
3049         GByteArray *array;
3050         guchar buf[BUFSIZ];
3051         gint n_read;
3052         gchar *str;
3053
3054         cm_return_val_if_fail(fp != NULL, NULL);
3055
3056         array = g_byte_array_new();
3057
3058         while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
3059                 if (n_read < sizeof(buf) && ferror(fp))
3060                         break;
3061                 g_byte_array_append(array, buf, n_read);
3062         }
3063
3064         if (ferror(fp)) {
3065                 FILE_OP_ERROR("file stream", "fread");
3066                 g_byte_array_free(array, TRUE);
3067                 return NULL;
3068         }
3069
3070         buf[0] = '\0';
3071         g_byte_array_append(array, buf, 1);
3072         str = (gchar *)array->data;
3073         g_byte_array_free(array, FALSE);
3074
3075         if (recode && !g_utf8_validate(str, -1, NULL)) {
3076                 const gchar *src_codeset, *dest_codeset;
3077                 gchar *tmp = NULL;
3078                 src_codeset = conv_get_locale_charset_str();
3079                 dest_codeset = CS_UTF_8;
3080                 tmp = conv_codeset_strdup(str, src_codeset, dest_codeset);
3081                 g_free(str);
3082                 str = tmp;
3083         }
3084
3085         return str;
3086 }
3087
3088 static gchar *file_read_to_str_full(const gchar *file, gboolean recode)
3089 {
3090         FILE *fp;
3091         gchar *str;
3092         GStatBuf s;
3093 #ifndef G_OS_WIN32
3094         gint fd, err;
3095         struct timeval timeout = {1, 0};
3096         fd_set fds;
3097         int fflags = 0;
3098 #endif
3099
3100         cm_return_val_if_fail(file != NULL, NULL);
3101
3102         if (g_stat(file, &s) != 0) {
3103                 FILE_OP_ERROR(file, "stat");
3104                 return NULL;
3105         }
3106         if (S_ISDIR(s.st_mode)) {
3107                 g_warning("%s: is a directory", file);
3108                 return NULL;
3109         }
3110
3111 #ifdef G_OS_WIN32
3112         fp = g_fopen (file, "rb");
3113         if (fp == NULL) {
3114                 FILE_OP_ERROR(file, "open");
3115                 return NULL;
3116         }
3117 #else
3118         /* test whether the file is readable without blocking */
3119         fd = g_open(file, O_RDONLY | O_NONBLOCK, 0);
3120         if (fd == -1) {
3121                 FILE_OP_ERROR(file, "open");
3122                 return NULL;
3123         }
3124
3125         FD_ZERO(&fds);
3126         FD_SET(fd, &fds);
3127
3128         /* allow for one second */
3129         err = select(fd+1, &fds, NULL, NULL, &timeout);
3130         if (err <= 0 || !FD_ISSET(fd, &fds)) {
3131                 if (err < 0) {
3132                         FILE_OP_ERROR(file, "select");
3133                 } else {
3134                         g_warning("%s: doesn't seem readable", file);
3135                 }
3136                 close(fd);
3137                 return NULL;
3138         }
3139
3140         /* Now clear O_NONBLOCK */
3141         if ((fflags = fcntl(fd, F_GETFL)) < 0) {
3142                 FILE_OP_ERROR(file, "fcntl (F_GETFL)");
3143                 close(fd);
3144                 return NULL;
3145         }
3146         if (fcntl(fd, F_SETFL, (fflags & ~O_NONBLOCK)) < 0) {
3147                 FILE_OP_ERROR(file, "fcntl (F_SETFL)");
3148                 close(fd);
3149                 return NULL;
3150         }
3151
3152         /* get the FILE pointer */
3153         fp = fdopen(fd, "rb");
3154
3155         if (fp == NULL) {
3156                 FILE_OP_ERROR(file, "fdopen");
3157                 close(fd); /* if fp isn't NULL, we'll use fclose instead! */
3158                 return NULL;
3159         }
3160 #endif
3161
3162         str = file_read_stream_to_str_full(fp, recode);
3163
3164         fclose(fp);
3165
3166         return str;
3167 }
3168
3169 gchar *file_read_to_str(const gchar *file)
3170 {
3171         return file_read_to_str_full(file, TRUE);
3172 }
3173 gchar *file_read_stream_to_str(FILE *fp)
3174 {
3175         return file_read_stream_to_str_full(fp, TRUE);
3176 }
3177
3178 gchar *file_read_to_str_no_recode(const gchar *file)
3179 {
3180         return file_read_to_str_full(file, FALSE);
3181 }
3182 gchar *file_read_stream_to_str_no_recode(FILE *fp)
3183 {
3184         return file_read_stream_to_str_full(fp, FALSE);
3185 }
3186
3187 char *fgets_crlf(char *buf, int size, FILE *stream)
3188 {
3189         gboolean is_cr = FALSE;
3190         gboolean last_was_cr = FALSE;
3191         int c = 0;
3192         char *cs;
3193
3194         cs = buf;
3195         while (--size > 0 && (c = getc(stream)) != EOF)
3196         {
3197                 *cs++ = c;
3198                 is_cr = (c == '\r');
3199                 if (c == '\n') {
3200                         break;
3201                 }
3202                 if (last_was_cr) {
3203                         *(--cs) = '\n';
3204                         cs++;
3205                         ungetc(c, stream);
3206                         break;
3207                 }
3208                 last_was_cr = is_cr;
3209         }
3210         if (c == EOF && cs == buf)
3211                 return NULL;
3212
3213         *cs = '\0';
3214
3215         return buf;
3216 }
3217
3218 static gint execute_async(gchar *const argv[], const gchar *working_directory)
3219 {
3220         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
3221
3222         if (g_spawn_async(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
3223                           NULL, NULL, NULL, FALSE) == FALSE) {
3224                 g_warning("couldn't execute command: %s", argv[0]);
3225                 return -1;
3226         }
3227
3228         return 0;
3229 }
3230
3231 static gint execute_sync(gchar *const argv[], const gchar *working_directory)
3232 {
3233         gint status;
3234
3235         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
3236
3237 #ifdef G_OS_UNIX
3238         if (g_spawn_sync(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
3239                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
3240                 g_warning("couldn't execute command: %s", argv[0]);
3241                 return -1;
3242         }
3243
3244         if (WIFEXITED(status))
3245                 return WEXITSTATUS(status);
3246         else
3247                 return -1;
3248 #else
3249         if (g_spawn_sync(working_directory, (gchar **)argv, NULL,
3250                                 G_SPAWN_SEARCH_PATH|
3251                                 G_SPAWN_CHILD_INHERITS_STDIN|
3252                                 G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
3253                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
3254                 g_warning("couldn't execute command: %s", argv[0]);
3255                 return -1;
3256         }
3257
3258         return status;
3259 #endif
3260 }
3261
3262 gint execute_command_line(const gchar *cmdline, gboolean async,
3263                 const gchar *working_directory)
3264 {
3265         gchar **argv;
3266         gint ret;
3267
3268         debug_print("execute_command_line(): executing: %s\n", cmdline?cmdline:"(null)");
3269
3270         argv = strsplit_with_quote(cmdline, " ", 0);
3271
3272         if (async)
3273                 ret = execute_async(argv, working_directory);
3274         else
3275                 ret = execute_sync(argv, working_directory);
3276
3277         g_strfreev(argv);
3278
3279         return ret;
3280 }
3281
3282 gchar *get_command_output(const gchar *cmdline)
3283 {
3284         gchar *child_stdout;
3285         gint status;
3286
3287         cm_return_val_if_fail(cmdline != NULL, NULL);
3288
3289         debug_print("get_command_output(): executing: %s\n", cmdline);
3290
3291         if (g_spawn_command_line_sync(cmdline, &child_stdout, NULL, &status,
3292                                       NULL) == FALSE) {
3293                 g_warning("couldn't execute command: %s", cmdline);
3294                 return NULL;
3295         }
3296
3297         return child_stdout;
3298 }
3299
3300 static gint is_unchanged_uri_char(char c)
3301 {
3302         switch (c) {
3303                 case '(':
3304                 case ')':
3305                         return 0;
3306                 default:
3307                         return 1;
3308         }
3309 }
3310
3311 static void encode_uri(gchar *encoded_uri, gint bufsize, const gchar *uri)
3312 {
3313         int i;
3314         int k;
3315
3316         k = 0;
3317         for(i = 0; i < strlen(uri) ; i++) {
3318                 if (is_unchanged_uri_char(uri[i])) {
3319                         if (k + 2 >= bufsize)
3320                                 break;
3321                         encoded_uri[k++] = uri[i];
3322                 }
3323                 else {
3324                         char * hexa = "0123456789ABCDEF";
3325
3326                         if (k + 4 >= bufsize)
3327                                 break;
3328                         encoded_uri[k++] = '%';
3329                         encoded_uri[k++] = hexa[uri[i] / 16];
3330                         encoded_uri[k++] = hexa[uri[i] % 16];
3331                 }
3332         }
3333         encoded_uri[k] = 0;
3334 }
3335
3336 gint open_uri(const gchar *uri, const gchar *cmdline)
3337 {
3338
3339 #ifndef G_OS_WIN32
3340         gchar buf[BUFFSIZE];
3341         gchar *p;
3342         gchar encoded_uri[BUFFSIZE];
3343         cm_return_val_if_fail(uri != NULL, -1);
3344
3345         /* an option to choose whether to use encode_uri or not ? */
3346         encode_uri(encoded_uri, BUFFSIZE, uri);
3347
3348         if (cmdline &&
3349             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
3350             !strchr(p + 2, '%'))
3351                 g_snprintf(buf, sizeof(buf), cmdline, encoded_uri);
3352         else {
3353                 if (cmdline)
3354                         g_warning("Open URI command-line is invalid "
3355                                   "(there must be only one '%%s'): %s",
3356                                   cmdline);
3357                 g_snprintf(buf, sizeof(buf), DEFAULT_BROWSER_CMD, encoded_uri);
3358         }
3359
3360         execute_command_line(buf, TRUE, NULL);
3361 #else
3362         ShellExecute(NULL, "open", uri, NULL, NULL, SW_SHOW);
3363 #endif
3364         return 0;
3365 }
3366
3367 gint open_txt_editor(const gchar *filepath, const gchar *cmdline)
3368 {
3369         gchar buf[BUFFSIZE];
3370         gchar *p;
3371
3372         cm_return_val_if_fail(filepath != NULL, -1);
3373
3374         if (cmdline &&
3375             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
3376             !strchr(p + 2, '%'))
3377                 g_snprintf(buf, sizeof(buf), cmdline, filepath);
3378         else {
3379                 if (cmdline)
3380                         g_warning("Open Text Editor command-line is invalid "
3381                                   "(there must be only one '%%s'): %s",
3382                                   cmdline);
3383                 g_snprintf(buf, sizeof(buf), DEFAULT_EDITOR_CMD, filepath);
3384         }
3385
3386         execute_command_line(buf, TRUE, NULL);
3387
3388         return 0;
3389 }
3390
3391 time_t remote_tzoffset_sec(const gchar *zone)
3392 {
3393         static gchar ustzstr[] = "PSTPDTMSTMDTCSTCDTESTEDT";
3394         gchar zone3[4];
3395         gchar *p;
3396         gchar c;
3397         gint iustz;
3398         gint offset;
3399         time_t remoteoffset;
3400
3401         strncpy(zone3, zone, 3);
3402         zone3[3] = '\0';
3403         remoteoffset = 0;
3404
3405         if (sscanf(zone, "%c%d", &c, &offset) == 2 &&
3406             (c == '+' || c == '-')) {
3407                 remoteoffset = ((offset / 100) * 60 + (offset % 100)) * 60;
3408                 if (c == '-')
3409                         remoteoffset = -remoteoffset;
3410         } else if (!strncmp(zone, "UT" , 2) ||
3411                    !strncmp(zone, "GMT", 3)) {
3412                 remoteoffset = 0;
3413         } else if (strlen(zone3) == 3) {
3414                 for (p = ustzstr; *p != '\0'; p += 3) {
3415                         if (!g_ascii_strncasecmp(p, zone3, 3)) {
3416                                 iustz = ((gint)(p - ustzstr) / 3 + 1) / 2 - 8;
3417                                 remoteoffset = iustz * 3600;
3418                                 break;
3419                         }
3420                 }
3421                 if (*p == '\0')
3422                         return -1;
3423         } else if (strlen(zone3) == 1) {
3424                 switch (zone[0]) {
3425                 case 'Z': remoteoffset =   0; break;
3426                 case 'A': remoteoffset =  -1; break;
3427                 case 'B': remoteoffset =  -2; break;
3428                 case 'C': remoteoffset =  -3; break;
3429                 case 'D': remoteoffset =  -4; break;
3430                 case 'E': remoteoffset =  -5; break;
3431                 case 'F': remoteoffset =  -6; break;
3432                 case 'G': remoteoffset =  -7; break;
3433                 case 'H': remoteoffset =  -8; break;
3434                 case 'I': remoteoffset =  -9; break;
3435                 case 'K': remoteoffset = -10; break; /* J is not used */
3436                 case 'L': remoteoffset = -11; break;
3437                 case 'M': remoteoffset = -12; break;
3438                 case 'N': remoteoffset =   1; break;
3439                 case 'O': remoteoffset =   2; break;
3440                 case 'P': remoteoffset =   3; break;
3441                 case 'Q': remoteoffset =   4; break;
3442                 case 'R': remoteoffset =   5; break;
3443                 case 'S': remoteoffset =   6; break;
3444                 case 'T': remoteoffset =   7; break;
3445                 case 'U': remoteoffset =   8; break;
3446                 case 'V': remoteoffset =   9; break;
3447                 case 'W': remoteoffset =  10; break;
3448                 case 'X': remoteoffset =  11; break;
3449                 case 'Y': remoteoffset =  12; break;
3450                 default:  remoteoffset =   0; break;
3451                 }
3452                 remoteoffset = remoteoffset * 3600;
3453         } else
3454                 return -1;
3455
3456         return remoteoffset;
3457 }
3458
3459 time_t tzoffset_sec(time_t *now)
3460 {
3461         struct tm gmt, *lt;
3462         gint off;
3463         struct tm buf1, buf2;
3464 #ifdef G_OS_WIN32
3465         if (now && *now < 0)
3466                 return 0;
3467 #endif
3468         gmt = *gmtime_r(now, &buf1);
3469         lt = localtime_r(now, &buf2);
3470
3471         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
3472
3473         if (lt->tm_year < gmt.tm_year)
3474                 off -= 24 * 60;
3475         else if (lt->tm_year > gmt.tm_year)
3476                 off += 24 * 60;
3477         else if (lt->tm_yday < gmt.tm_yday)
3478                 off -= 24 * 60;
3479         else if (lt->tm_yday > gmt.tm_yday)
3480                 off += 24 * 60;
3481
3482         if (off >= 24 * 60)             /* should be impossible */
3483                 off = 23 * 60 + 59;     /* if not, insert silly value */
3484         if (off <= -24 * 60)
3485                 off = -(23 * 60 + 59);
3486
3487         return off * 60;
3488 }
3489
3490 /* calculate timezone offset */
3491 gchar *tzoffset(time_t *now)
3492 {
3493         static gchar offset_string[6];
3494         struct tm gmt, *lt;
3495         gint off;
3496         gchar sign = '+';
3497         struct tm buf1, buf2;
3498 #ifdef G_OS_WIN32
3499         if (now && *now < 0)
3500                 return 0;
3501 #endif
3502         gmt = *gmtime_r(now, &buf1);
3503         lt = localtime_r(now, &buf2);
3504
3505         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
3506
3507         if (lt->tm_year < gmt.tm_year)
3508                 off -= 24 * 60;
3509         else if (lt->tm_year > gmt.tm_year)
3510                 off += 24 * 60;
3511         else if (lt->tm_yday < gmt.tm_yday)
3512                 off -= 24 * 60;
3513         else if (lt->tm_yday > gmt.tm_yday)
3514                 off += 24 * 60;
3515
3516         if (off < 0) {
3517                 sign = '-';
3518                 off = -off;
3519         }
3520
3521         if (off >= 24 * 60)             /* should be impossible */
3522                 off = 23 * 60 + 59;     /* if not, insert silly value */
3523
3524         sprintf(offset_string, "%c%02d%02d", sign, off / 60, off % 60);
3525
3526         return offset_string;
3527 }
3528
3529 static void _get_rfc822_date(gchar *buf, gint len, gboolean hidetz)
3530 {
3531         struct tm *lt;
3532         time_t t;
3533         gchar day[4], mon[4];
3534         gint dd, hh, mm, ss, yyyy;
3535         struct tm buf1;
3536         gchar buf2[RFC822_DATE_BUFFSIZE];
3537
3538         t = time(NULL);
3539         lt = localtime_r(&t, &buf1);
3540
3541         sscanf(asctime_r(lt, buf2), "%3s %3s %d %d:%d:%d %d\n",
3542                day, mon, &dd, &hh, &mm, &ss, &yyyy);
3543
3544         g_snprintf(buf, len, "%s, %d %s %d %02d:%02d:%02d %s",
3545                    day, dd, mon, yyyy, hh, mm, ss, (hidetz? "-0000": tzoffset(&t)));
3546 }
3547
3548 void get_rfc822_date(gchar *buf, gint len)
3549 {
3550         _get_rfc822_date(buf, len, FALSE);
3551 }
3552
3553 void get_rfc822_date_hide_tz(gchar *buf, gint len)
3554 {
3555         _get_rfc822_date(buf, len, TRUE);
3556 }
3557
3558 void debug_set_mode(gboolean mode)
3559 {
3560         debug_mode = mode;
3561 }
3562
3563 gboolean debug_get_mode(void)
3564 {
3565         return debug_mode;
3566 }
3567
3568 void debug_print_real(const gchar *format, ...)
3569 {
3570         va_list args;
3571         gchar buf[BUFFSIZE];
3572
3573         if (!debug_mode) return;
3574
3575         va_start(args, format);
3576         g_vsnprintf(buf, sizeof(buf), format, args);
3577         va_end(args);
3578
3579         g_print("%s", buf);
3580 }
3581
3582
3583 const char * debug_srcname(const char *file)
3584 {
3585         const char *s = strrchr (file, '/');
3586         return s? s+1:file;
3587 }
3588
3589
3590 void * subject_table_lookup(GHashTable *subject_table, gchar * subject)
3591 {
3592         if (subject == NULL)
3593                 subject = "";
3594         else
3595                 subject += subject_get_prefix_length(subject);
3596
3597         return g_hash_table_lookup(subject_table, subject);
3598 }
3599
3600 void subject_table_insert(GHashTable *subject_table, gchar * subject,
3601                           void * data)
3602 {
3603         if (subject == NULL || *subject == 0)
3604                 return;
3605         subject += subject_get_prefix_length(subject);
3606         g_hash_table_insert(subject_table, subject, data);
3607 }
3608
3609 void subject_table_remove(GHashTable *subject_table, gchar * subject)
3610 {
3611         if (subject == NULL)
3612                 return;
3613
3614         subject += subject_get_prefix_length(subject);
3615         g_hash_table_remove(subject_table, subject);
3616 }
3617
3618 static regex_t u_regex;
3619 static gboolean u_init_;
3620
3621 void utils_free_regex(void)
3622 {
3623         if (u_init_) {
3624                 regfree(&u_regex);
3625                 u_init_ = FALSE;
3626         }
3627 }
3628
3629 /*!
3630  *\brief        Check if a string is prefixed with known (combinations)
3631  *              of prefixes. The function assumes that each prefix
3632  *              is terminated by zero or exactly _one_ space.
3633  *
3634  *\param        str String to check for a prefixes
3635  *
3636  *\return       int Number of chars in the prefix that should be skipped
3637  *              for a "clean" subject line. If no prefix was found, 0
3638  *              is returned.
3639  */
3640 int subject_get_prefix_length(const gchar *subject)
3641 {
3642         /*!< Array with allowable reply prefixes regexps. */
3643         static const gchar * const prefixes[] = {
3644                 "Re\\:",                        /* "Re:" */
3645                 "Re\\[[1-9][0-9]*\\]\\:",       /* "Re[XXX]:" (non-conforming news mail clients) */
3646                 "Antw\\:",                      /* "Antw:" (Dutch / German Outlook) */
3647                 "Aw\\:",                        /* "Aw:"   (German) */
3648                 "Antwort\\:",                   /* "Antwort:" (German Lotus Notes) */
3649                 "Res\\:",                       /* "Res:" (Spanish/Brazilian Outlook) */
3650                 "Fw\\:",                        /* "Fw:" Forward */
3651                 "Fwd\\:",                       /* "Fwd:" Forward */
3652                 "Enc\\:",                       /* "Enc:" Forward (Brazilian Outlook) */
3653                 "Odp\\:",                       /* "Odp:" Re (Polish Outlook) */
3654                 "Rif\\:",                       /* "Rif:" (Italian Outlook) */
3655                 "Sv\\:",                        /* "Sv" (Norwegian) */
3656                 "Vs\\:",                        /* "Vs" (Norwegian) */
3657                 "Ad\\:",                        /* "Ad" (Norwegian) */
3658                 "\347\255\224\345\244\215\\:",  /* "Re" (Chinese, UTF-8) */
3659                 "R\303\251f\\. \\:",            /* "R�f. :" (French Lotus Notes) */
3660                 "Re \\:",                       /* "Re :" (French Yahoo Mail) */
3661                 /* add more */
3662         };
3663         const int PREFIXES = sizeof prefixes / sizeof prefixes[0];
3664         int n;
3665         regmatch_t pos;
3666
3667         if (!subject) return 0;
3668         if (!*subject) return 0;
3669
3670         if (!u_init_) {
3671                 GString *s = g_string_new("");
3672
3673                 for (n = 0; n < PREFIXES; n++)
3674                         /* Terminate each prefix regexpression by a
3675                          * "\ ?" (zero or ONE space), and OR them */
3676                         g_string_append_printf(s, "(%s\\ ?)%s",
3677                                           prefixes[n],
3678                                           n < PREFIXES - 1 ?
3679                                           "|" : "");
3680
3681                 g_string_prepend(s, "(");
3682                 g_string_append(s, ")+");       /* match at least once */
3683                 g_string_prepend(s, "^\\ *");   /* from beginning of line */
3684
3685
3686                 /* We now have something like "^\ *((PREFIX1\ ?)|(PREFIX2\ ?))+"
3687                  * TODO: Should this be       "^\ *(((PREFIX1)|(PREFIX2))\ ?)+" ??? */
3688                 if (regcomp(&u_regex, s->str, REG_EXTENDED | REG_ICASE)) {
3689                         debug_print("Error compiling regexp %s\n", s->str);
3690                         g_string_free(s, TRUE);
3691                         return 0;
3692                 } else {
3693                         u_init_ = TRUE;
3694                         g_string_free(s, TRUE);
3695                 }
3696         }
3697
3698         if (!regexec(&u_regex, subject, 1, &pos, 0) && pos.rm_so != -1)
3699                 return pos.rm_eo;
3700         else
3701                 return 0;
3702 }
3703
3704 static guint g_stricase_hash(gconstpointer gptr)
3705 {
3706         guint hash_result = 0;
3707         const char *str;
3708
3709         for (str = gptr; str && *str; str++) {
3710                 hash_result += toupper(*str);
3711         }
3712
3713         return hash_result;
3714 }
3715
3716 static gint g_stricase_equal(gconstpointer gptr1, gconstpointer gptr2)
3717 {
3718         const char *str1 = gptr1;
3719         const char *str2 = gptr2;
3720
3721         return !strcasecmp(str1, str2);
3722 }
3723
3724 gint g_int_compare(gconstpointer a, gconstpointer b)
3725 {
3726         return GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b);
3727 }
3728
3729 /*
3730    quote_cmd_argument()
3731
3732    return a quoted string safely usable in argument of a command.
3733
3734    code is extracted and adapted from etPan! project -- DINH V. Ho�.
3735 */
3736
3737 gint quote_cmd_argument(gchar * result, guint size,
3738                         const gchar * path)
3739 {
3740         const gchar * p;
3741         gchar * result_p;
3742         guint remaining;
3743
3744         result_p = result;
3745         remaining = size;
3746
3747         for(p = path ; * p != '\0' ; p ++) {
3748
3749                 if (isalnum((guchar)*p) || (* p == '/')) {
3750                         if (remaining > 0) {
3751                                 * result_p = * p;
3752                                 result_p ++;
3753                                 remaining --;
3754                         }
3755                         else {
3756                                 result[size - 1] = '\0';
3757                                 return -1;
3758                         }
3759                 }
3760                 else {
3761                         if (remaining >= 2) {
3762                                 * result_p = '\\';
3763                                 result_p ++;
3764                                 * result_p = * p;
3765                                 result_p ++;
3766                                 remaining -= 2;
3767                         }
3768                         else {
3769                                 result[size - 1] = '\0';
3770                                 return -1;
3771                         }
3772                 }
3773         }
3774         if (remaining > 0) {
3775                 * result_p = '\0';
3776         }
3777         else {
3778                 result[size - 1] = '\0';
3779                 return -1;
3780         }
3781
3782         return 0;
3783 }
3784
3785 typedef struct
3786 {
3787         GNode           *parent;
3788         GNodeMapFunc     func;
3789         gpointer         data;
3790 } GNodeMapData;
3791
3792 static void g_node_map_recursive(GNode *node, gpointer data)
3793 {
3794         GNodeMapData *mapdata = (GNodeMapData *) data;
3795         GNode *newnode;
3796         GNodeMapData newmapdata;
3797         gpointer newdata;
3798
3799         newdata = mapdata->func(node->data, mapdata->data);
3800         if (newdata != NULL) {
3801                 newnode = g_node_new(newdata);
3802                 g_node_append(mapdata->parent, newnode);
3803
3804                 newmapdata.parent = newnode;
3805                 newmapdata.func = mapdata->func;
3806                 newmapdata.data = mapdata->data;
3807
3808                 g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &newmapdata);
3809         }
3810 }
3811
3812 GNode *g_node_map(GNode *node, GNodeMapFunc func, gpointer data)
3813 {
3814         GNode *root;
3815         GNodeMapData mapdata;
3816
3817         cm_return_val_if_fail(node != NULL, NULL);
3818         cm_return_val_if_fail(func != NULL, NULL);
3819
3820         root = g_node_new(func(node->data, data));
3821
3822         mapdata.parent = root;
3823         mapdata.func = func;
3824         mapdata.data = data;
3825
3826         g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &mapdata);
3827
3828         return root;
3829 }
3830
3831 #define HEX_TO_INT(val, hex)                    \
3832 {                                               \
3833         gchar c = hex;                          \
3834                                                 \
3835         if ('0' <= c && c <= '9') {             \
3836                 val = c - '0';                  \
3837         } else if ('a' <= c && c <= 'f') {      \
3838                 val = c - 'a' + 10;             \
3839         } else if ('A' <= c && c <= 'F') {      \
3840                 val = c - 'A' + 10;             \
3841         } else {                                \
3842                 val = -1;                       \
3843         }                                       \
3844 }
3845
3846 gboolean get_hex_value(guchar *out, gchar c1, gchar c2)
3847 {
3848         gint hi, lo;
3849
3850         HEX_TO_INT(hi, c1);
3851         HEX_TO_INT(lo, c2);
3852
3853         if (hi == -1 || lo == -1)
3854                 return FALSE;
3855
3856         *out = (hi << 4) + lo;
3857         return TRUE;
3858 }
3859
3860 #define INT_TO_HEX(hex, val)            \
3861 {                                       \
3862         if ((val) < 10)                 \
3863                 hex = '0' + (val);      \
3864         else                            \
3865                 hex = 'A' + (val) - 10; \
3866 }
3867
3868 void get_hex_str(gchar *out, guchar ch)
3869 {
3870         gchar hex;
3871
3872         INT_TO_HEX(hex, ch >> 4);
3873         *out++ = hex;
3874         INT_TO_HEX(hex, ch & 0x0f);
3875         *out   = hex;
3876 }
3877
3878 #undef REF_DEBUG
3879 #ifndef REF_DEBUG
3880 #define G_PRINT_REF 1 == 1 ? (void) 0 : (void)
3881 #else
3882 #define G_PRINT_REF g_print
3883 #endif
3884
3885 /*!
3886  *\brief        Register ref counted pointer. It is based on GBoxed, so should
3887  *              work with anything that uses the GType system. The semantics
3888  *              are similar to a C++ auto pointer, with the exception that
3889  *              C doesn't have automatic closure (calling destructors) when
3890  *              exiting a block scope.
3891  *              Use the \ref G_TYPE_AUTO_POINTER macro instead of calling this
3892  *              function directly.
3893  *
3894  *\return       GType A GType type.
3895  */
3896 GType g_auto_pointer_register(void)
3897 {
3898         static GType auto_pointer_type;
3899         if (!auto_pointer_type)
3900                 auto_pointer_type =
3901                         g_boxed_type_register_static
3902                                 ("G_TYPE_AUTO_POINTER",
3903                                  (GBoxedCopyFunc) g_auto_pointer_copy,
3904                                  (GBoxedFreeFunc) g_auto_pointer_free);
3905         return auto_pointer_type;
3906 }
3907
3908 /*!
3909  *\brief        Structure with g_new() allocated pointer guarded by the
3910  *              auto pointer
3911  */
3912 typedef struct AutoPointerRef {
3913         void          (*free) (gpointer);
3914         gpointer        pointer;
3915         glong           cnt;
3916 } AutoPointerRef;
3917
3918 /*!
3919  *\brief        The auto pointer opaque structure that references the
3920  *              pointer guard block.
3921  */
3922 typedef struct AutoPointer {
3923         AutoPointerRef *ref;
3924         gpointer        ptr; /*!< access to protected pointer */
3925 } AutoPointer;
3926
3927 /*!
3928  *\brief        Creates an auto pointer for a g_new()ed pointer. Example:
3929  *
3930  *\code
3931  *
3932  *              ... tell gtk_list_store it should use a G_TYPE_AUTO_POINTER
3933  *              ... when assigning, copying and freeing storage elements
3934  *
3935  *              gtk_list_store_new(N_S_COLUMNS,
3936  *                                 G_TYPE_AUTO_POINTER,
3937  *                                 -1);
3938  *
3939  *
3940  *              Template *precious_data = g_new0(Template, 1);
3941  *              g_pointer protect = g_auto_pointer_new(precious_data);
3942  *
3943  *              gtk_list_store_set(container, &iter,
3944  *                                 S_DATA, protect,
3945  *                                 -1);
3946  *
3947  *              ... the gtk_list_store has copied the pointer and
3948  *              ... incremented its reference count, we should free
3949  *              ... the auto pointer (in C++ a destructor would do
3950  *              ... this for us when leaving block scope)
3951  *
3952  *              g_auto_pointer_free(protect);
3953  *
3954  *              ... gtk_list_store_set() now manages the data. When
3955  *              ... *explicitly* requesting a pointer from the list
3956  *              ... store, don't forget you get a copy that should be
3957  *              ... freed with g_auto_pointer_free() eventually.
3958  *
3959  *\endcode
3960  *
3961  *\param        pointer Pointer to be guarded.
3962  *
3963  *\return       GAuto * Pointer that should be used in containers with
3964  *              GType support.
3965  */
3966 GAuto *g_auto_pointer_new(gpointer p)
3967 {
3968         AutoPointerRef *ref;
3969         AutoPointer    *ptr;
3970
3971         if (p == NULL)
3972                 return NULL;
3973
3974         ref = g_new0(AutoPointerRef, 1);
3975         ptr = g_new0(AutoPointer, 1);
3976
3977         ref->pointer = p;
3978         ref->free = g_free;
3979         ref->cnt = 1;
3980
3981         ptr->ref = ref;
3982         ptr->ptr = p;
3983
3984 #ifdef REF_DEBUG
3985         G_PRINT_REF ("XXXX ALLOC(%lx)\n", p);
3986 #endif
3987         return ptr;
3988 }
3989
3990 /*!
3991  *\brief        Allocate an autopointer using the passed \a free function to
3992  *              free the guarded pointer
3993  */
3994 GAuto *g_auto_pointer_new_with_free(gpointer p, GFreeFunc free_)
3995 {
3996         AutoPointer *aptr;
3997
3998         if (p == NULL)
3999                 return NULL;
4000
4001         aptr = g_auto_pointer_new(p);
4002         aptr->ref->free = free_;
4003         return aptr;
4004 }
4005
4006 gpointer g_auto_pointer_get_ptr(GAuto *auto_ptr)
4007 {
4008         if (auto_ptr == NULL)
4009                 return NULL;
4010         return ((AutoPointer *) auto_ptr)->ptr;
4011 }
4012
4013 /*!
4014  *\brief        Copies an auto pointer by. It's mostly not necessary
4015  *              to call this function directly, unless you copy/assign
4016  *              the guarded pointer.
4017  *
4018  *\param        auto_ptr Auto pointer returned by previous call to
4019  *              g_auto_pointer_new_XXX()
4020  *
4021  *\return       gpointer An auto pointer
4022  */
4023 GAuto *g_auto_pointer_copy(GAuto *auto_ptr)
4024 {
4025         AutoPointer     *ptr;
4026         AutoPointerRef  *ref;
4027         AutoPointer     *newp;
4028
4029         if (auto_ptr == NULL)
4030                 return NULL;
4031
4032         ptr = auto_ptr;
4033         ref = ptr->ref;
4034         newp = g_new0(AutoPointer, 1);
4035
4036         newp->ref = ref;
4037         newp->ptr = ref->pointer;
4038         ++(ref->cnt);
4039
4040 #ifdef REF_DEBUG
4041         G_PRINT_REF ("XXXX COPY(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
4042 #endif
4043         return newp;
4044 }
4045
4046 /*!
4047  *\brief        Free an auto pointer
4048  */
4049 void g_auto_pointer_free(GAuto *auto_ptr)
4050 {
4051         AutoPointer     *ptr;
4052         AutoPointerRef  *ref;
4053
4054         if (auto_ptr == NULL)
4055                 return;
4056
4057         ptr = auto_ptr;
4058         ref = ptr->ref;
4059
4060         if (--(ref->cnt) == 0) {
4061 #ifdef REF_DEBUG
4062                 G_PRINT_REF ("XXXX FREE(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
4063 #endif
4064                 ref->free(ref->pointer);
4065                 g_free(ref);
4066         }
4067 #ifdef REF_DEBUG
4068         else
4069                 G_PRINT_REF ("XXXX DEREF(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
4070 #endif
4071         g_free(ptr);
4072 }
4073
4074 void replace_returns(gchar *str)
4075 {
4076         if (!str)
4077                 return;
4078
4079         while (strstr(str, "\n")) {
4080                 *strstr(str, "\n") = ' ';
4081         }
4082         while (strstr(str, "\r")) {
4083                 *strstr(str, "\r") = ' ';
4084         }
4085 }
4086
4087 /* get_uri_part() - retrieves a URI starting from scanpos.
4088                     Returns TRUE if successful */
4089 gboolean get_uri_part(const gchar *start, const gchar *scanpos,
4090                              const gchar **bp, const gchar **ep, gboolean hdr)
4091 {
4092         const gchar *ep_;
4093         gint parenthese_cnt = 0;
4094
4095         cm_return_val_if_fail(start != NULL, FALSE);
4096         cm_return_val_if_fail(scanpos != NULL, FALSE);
4097         cm_return_val_if_fail(bp != NULL, FALSE);
4098         cm_return_val_if_fail(ep != NULL, FALSE);
4099
4100         *bp = scanpos;
4101
4102         /* find end point of URI */
4103         for (ep_ = scanpos; *ep_ != '\0'; ep_++) {
4104                 if (!g_ascii_isgraph(*(const guchar *)ep_) ||
4105                     !IS_ASCII(*(const guchar *)ep_) ||
4106                     strchr("[]{}<>\"", *ep_)) {
4107                         break;
4108                 } else if (strchr("(", *ep_)) {
4109                         parenthese_cnt++;
4110                 } else if (strchr(")", *ep_)) {
4111                         if (parenthese_cnt > 0)
4112                                 parenthese_cnt--;
4113                         else
4114                                 break;
4115                 }
4116         }
4117
4118         /* no punctuation at end of string */
4119
4120         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
4121          * should pass some URI type to this function and decide on that whether
4122          * to perform punctuation stripping */
4123
4124 #define IS_REAL_PUNCT(ch)       (g_ascii_ispunct(ch) && !strchr("/?=-_~)", ch))
4125
4126         for (; ep_ - 1 > scanpos + 1 &&
4127                IS_REAL_PUNCT(*(ep_ - 1));
4128              ep_--)
4129                 ;
4130
4131 #undef IS_REAL_PUNCT
4132
4133         *ep = ep_;
4134
4135         return TRUE;
4136 }
4137
4138 gchar *make_uri_string(const gchar *bp, const gchar *ep)
4139 {
4140         while (bp && *bp && g_ascii_isspace(*bp))
4141                 bp++;
4142         return g_strndup(bp, ep - bp);
4143 }
4144
4145 /* valid mail address characters */
4146 #define IS_RFC822_CHAR(ch) \
4147         (IS_ASCII(ch) && \
4148          (ch) > 32   && \
4149          (ch) != 127 && \
4150          !g_ascii_isspace(ch) && \
4151          !strchr("(),;<>\"", (ch)))
4152
4153 /* alphabet and number within 7bit ASCII */
4154 #define IS_ASCII_ALNUM(ch)      (IS_ASCII(ch) && g_ascii_isalnum(ch))
4155 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
4156
4157 static GHashTable *create_domain_tab(void)
4158 {
4159         gint n;
4160         GHashTable *htab = g_hash_table_new(g_stricase_hash, g_stricase_equal);
4161
4162         cm_return_val_if_fail(htab, NULL);
4163         for (n = 0; n < sizeof toplvl_domains / sizeof toplvl_domains[0]; n++)
4164                 g_hash_table_insert(htab, (gpointer) toplvl_domains[n], (gpointer) toplvl_domains[n]);
4165         return htab;
4166 }
4167
4168 static gboolean is_toplvl_domain(GHashTable *tab, const gchar *first, const gchar *last)
4169 {
4170         const gint MAX_LVL_DOM_NAME_LEN = 6;
4171         gchar buf[MAX_LVL_DOM_NAME_LEN + 1];
4172         const gchar *m = buf + MAX_LVL_DOM_NAME_LEN + 1;
4173         register gchar *p;
4174
4175         if (last - first > MAX_LVL_DOM_NAME_LEN || first > last)
4176                 return FALSE;
4177
4178         for (p = buf; p < m &&  first < last; *p++ = *first++)
4179                 ;
4180         *p = 0;
4181
4182         return g_hash_table_lookup(tab, buf) != NULL;
4183 }
4184
4185 /* get_email_part() - retrieves an email address. Returns TRUE if successful */
4186 gboolean get_email_part(const gchar *start, const gchar *scanpos,
4187                                const gchar **bp, const gchar **ep, gboolean hdr)
4188 {
4189         /* more complex than the uri part because we need to scan back and forward starting from
4190          * the scan position. */
4191         gboolean result = FALSE;
4192         const gchar *bp_ = NULL;
4193         const gchar *ep_ = NULL;
4194         static GHashTable *dom_tab;
4195         const gchar *last_dot = NULL;
4196         const gchar *prelast_dot = NULL;
4197         const gchar *last_tld_char = NULL;
4198
4199         /* the informative part of the email address (describing the name
4200          * of the email address owner) may contain quoted parts. the
4201          * closure stack stores the last encountered quotes. */
4202         gchar closure_stack[128];
4203         gchar *ptr = closure_stack;
4204
4205         cm_return_val_if_fail(start != NULL, FALSE);
4206         cm_return_val_if_fail(scanpos != NULL, FALSE);
4207         cm_return_val_if_fail(bp != NULL, FALSE);
4208         cm_return_val_if_fail(ep != NULL, FALSE);
4209
4210         if (hdr) {
4211                 const gchar *start_quote = NULL;
4212                 const gchar *end_quote = NULL;
4213 search_again:
4214                 /* go to the real start */
4215                 if (start[0] == ',')
4216                         start++;
4217                 if (start[0] == ';')
4218                         start++;
4219                 while (start[0] == '\n' || start[0] == '\r')
4220                         start++;
4221                 while (start[0] == ' ' || start[0] == '\t')
4222                         start++;
4223
4224                 *bp = start;
4225
4226                 /* check if there are quotes (to skip , in them) */
4227                 if (*start == '"') {
4228                         start_quote = start;
4229                         start++;
4230                         end_quote = strstr(start, "\"");
4231                 } else {
4232                         start_quote = NULL;
4233                         end_quote = NULL;
4234                 }
4235
4236                 /* skip anything between quotes */
4237                 if (start_quote && end_quote) {
4238                         start = end_quote;
4239
4240                 }
4241
4242                 /* find end (either , or ; or end of line) */
4243                 if (strstr(start, ",") && strstr(start, ";"))
4244                         *ep = strstr(start,",") < strstr(start, ";")
4245                                 ? strstr(start, ",") : strstr(start, ";");
4246                 else if (strstr(start, ","))
4247                         *ep = strstr(start, ",");
4248                 else if (strstr(start, ";"))
4249                         *ep = strstr(start, ";");
4250                 else
4251                         *ep = start+strlen(start);
4252
4253                 /* go back to real start */
4254                 if (start_quote && end_quote) {
4255                         start = start_quote;
4256                 }
4257
4258                 /* check there's still an @ in that, or search
4259                  * further if possible */
4260                 if (strstr(start, "@") && strstr(start, "@") < *ep)
4261                         return TRUE;
4262                 else if (*ep < start+strlen(start)) {
4263                         start = *ep;
4264                         goto search_again;
4265                 } else if (start_quote && strstr(start, "\"") && strstr(start, "\"") < *ep) {
4266                         *bp = start_quote;
4267                         return TRUE;
4268                 } else
4269                         return FALSE;
4270         }
4271
4272         if (!dom_tab)
4273                 dom_tab = create_domain_tab();
4274         cm_return_val_if_fail(dom_tab, FALSE);
4275
4276         /* scan start of address */
4277         for (bp_ = scanpos - 1;
4278              bp_ >= start && IS_RFC822_CHAR(*(const guchar *)bp_); bp_--)
4279                 ;
4280
4281         /* TODO: should start with an alnum? */
4282         bp_++;
4283         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*(const guchar *)bp_); bp_++)
4284                 ;
4285
4286         if (bp_ != scanpos) {
4287                 /* scan end of address */
4288                 for (ep_ = scanpos + 1;
4289                      *ep_ && IS_RFC822_CHAR(*(const guchar *)ep_); ep_++)
4290                         if (*ep_ == '.') {
4291                                 prelast_dot = last_dot;
4292                                 last_dot = ep_;
4293                                 if (*(last_dot + 1) == '.') {
4294                                         if (prelast_dot == NULL)
4295                                                 return FALSE;
4296                                         last_dot = prelast_dot;
4297                                         break;
4298                                 }
4299                         }
4300
4301                 /* TODO: really should terminate with an alnum? */
4302                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*(const guchar *)ep_);
4303                      --ep_)
4304                         ;
4305                 ep_++;
4306
4307                 if (last_dot == NULL)
4308                         return FALSE;
4309                 if (last_dot >= ep_)
4310                         last_dot = prelast_dot;
4311                 if (last_dot == NULL || (scanpos + 1 >= last_dot))
4312                         return FALSE;
4313                 last_dot++;
4314
4315                 for (last_tld_char = last_dot; last_tld_char < ep_; last_tld_char++)
4316                         if (*last_tld_char == '?')
4317                                 break;
4318
4319                 if (is_toplvl_domain(dom_tab, last_dot, last_tld_char))
4320                         result = TRUE;
4321
4322                 *ep = ep_;
4323                 *bp = bp_;
4324         }
4325
4326         if (!result) return FALSE;
4327
4328         if (*ep_ && bp_ != start && *(bp_ - 1) == '"' && *(ep_) == '"'
4329         && *(ep_ + 1) == ' ' && *(ep_ + 2) == '<'
4330         && IS_RFC822_CHAR(*(ep_ + 3))) {
4331                 /* this informative part with an @ in it is
4332                  * followed by the email address */
4333                 ep_ += 3;
4334
4335                 /* go to matching '>' (or next non-rfc822 char, like \n) */
4336                 for (; *ep_ != '>' && *ep_ != '\0' && IS_RFC822_CHAR(*ep_); ep_++)
4337                         ;
4338
4339                 /* include the bracket */
4340                 if (*ep_ == '>') ep_++;
4341
4342                 /* include the leading quote */
4343                 bp_--;
4344
4345                 *ep = ep_;
4346                 *bp = bp_;
4347                 return TRUE;
4348         }
4349
4350         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
4351         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
4352                 return FALSE;
4353
4354         /* see if this is <bracketed>; in this case we also scan for the informative part. */
4355         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
4356                 return TRUE;
4357
4358 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
4359 #define IN_STACK()      (ptr > closure_stack)
4360 /* has underrun check */
4361 #define POP_STACK()     if(IN_STACK()) --ptr
4362 /* has overrun check */
4363 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
4364 /* has underrun check */
4365 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
4366
4367         ep_++;
4368
4369         /* scan for the informative part. */
4370         for (bp_ -= 2; bp_ >= start; bp_--) {
4371                 /* if closure on the stack keep scanning */
4372                 if (PEEK_STACK() == *bp_) {
4373                         POP_STACK();
4374                         continue;
4375                 }
4376                 if (!IN_STACK() && (*bp_ == '\'' || *bp_ == '"')) {
4377                         PUSH_STACK(*bp_);
4378                         continue;
4379                 }
4380
4381                 /* if nothing in the closure stack, do the special conditions
4382                  * the following if..else expression simply checks whether
4383                  * a token is acceptable. if not acceptable, the clause
4384                  * should terminate the loop with a 'break' */
4385                 if (!PEEK_STACK()) {
4386                         if (*bp_ == '-'
4387                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
4388                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
4389                                 /* hyphens are allowed, but only in
4390                                    between alnums */
4391                         } else if (strchr(" \"'", *bp_)) {
4392                                 /* but anything not being a punctiation
4393                                    is ok */
4394                         } else {
4395                                 break; /* anything else is rejected */
4396                         }
4397                 }
4398         }
4399
4400         bp_++;
4401
4402         /* scan forward (should start with an alnum) */
4403         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
4404                 ;
4405 #undef PEEK_STACK
4406 #undef PUSH_STACK
4407 #undef POP_STACK
4408 #undef IN_STACK
4409 #undef FULL_STACK
4410
4411
4412         *bp = bp_;
4413         *ep = ep_;
4414
4415         return result;
4416 }
4417
4418 #undef IS_QUOTE
4419 #undef IS_ASCII_ALNUM
4420 #undef IS_RFC822_CHAR
4421
4422 gchar *make_email_string(const gchar *bp, const gchar *ep)
4423 {
4424         /* returns a mailto: URI; mailto: is also used to detect the
4425          * uri type later on in the button_pressed signal handler */
4426         gchar *tmp;
4427         gchar *result;
4428         gchar *colon, *at;
4429
4430         tmp = g_strndup(bp, ep - bp);
4431
4432         /* If there is a colon in the username part of the address,
4433          * we're dealing with an URI for some other protocol - do
4434          * not prefix with mailto: in such case. */
4435         colon = strchr(tmp, ':');
4436         at = strchr(tmp, '@');
4437         if (colon != NULL && at != NULL && colon < at) {
4438                 result = tmp;
4439         } else {
4440                 result = g_strconcat("mailto:", tmp, NULL);
4441                 g_free(tmp);
4442         }
4443
4444         return result;
4445 }
4446
4447 gchar *make_http_string(const gchar *bp, const gchar *ep)
4448 {
4449         /* returns an http: URI; */
4450         gchar *tmp;
4451         gchar *result;
4452
4453         while (bp && *bp && g_ascii_isspace(*bp))
4454                 bp++;
4455         tmp = g_strndup(bp, ep - bp);
4456         result = g_strconcat("http://", tmp, NULL);
4457         g_free(tmp);
4458
4459         return result;
4460 }
4461
4462 static gchar *mailcap_get_command_in_file(const gchar *path, const gchar *type, const gchar *file_to_open)
4463 {
4464         FILE *fp = g_fopen(path, "rb");
4465         gchar buf[BUFFSIZE];
4466         gchar *result = NULL;
4467         if (!fp)
4468                 return NULL;
4469         while (fgets(buf, sizeof (buf), fp) != NULL) {
4470                 gchar **parts = g_strsplit(buf, ";", 3);
4471                 gchar *trimmed = parts[0];
4472                 while (trimmed[0] == ' ' || trimmed[0] == '\t')
4473                         trimmed++;
4474                 while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
4475                         trimmed[strlen(trimmed)-1] = '\0';
4476
4477                 if (!strcmp(trimmed, type)) {
4478                         gboolean needsterminal = FALSE;
4479                         if (parts[2] && strstr(parts[2], "needsterminal")) {
4480                                 needsterminal = TRUE;
4481                         }
4482                         if (parts[2] && strstr(parts[2], "test=")) {
4483                                 gchar *orig_testcmd = g_strdup(strstr(parts[2], "test=")+5);
4484                                 gchar *testcmd = orig_testcmd;
4485                                 if (strstr(testcmd,";"))
4486                                         *(strstr(testcmd,";")) = '\0';
4487                                 while (testcmd[0] == ' ' || testcmd[0] == '\t')
4488                                         testcmd++;
4489                                 while (testcmd[strlen(testcmd)-1] == '\n')
4490                                         testcmd[strlen(testcmd)-1] = '\0';
4491                                 while (testcmd[strlen(testcmd)-1] == '\r')
4492                                         testcmd[strlen(testcmd)-1] = '\0';
4493                                 while (testcmd[strlen(testcmd)-1] == ' ' || testcmd[strlen(testcmd)-1] == '\t')
4494                                         testcmd[strlen(testcmd)-1] = '\0';
4495
4496                                 if (strstr(testcmd, "%s")) {
4497                                         gchar *tmp = g_strdup_printf(testcmd, file_to_open);
4498                                         gint res = system(tmp);
4499                                         g_free(tmp);
4500                                         g_free(orig_testcmd);
4501
4502                                         if (res != 0) {
4503                                                 g_strfreev(parts);
4504                                                 continue;
4505                                         }
4506                                 } else {
4507                                         gint res = system(testcmd);
4508                                         g_free(orig_testcmd);
4509
4510                                         if (res != 0) {
4511                                                 g_strfreev(parts);
4512                                                 continue;
4513                                         }
4514                                 }
4515                         }
4516
4517                         trimmed = parts[1];
4518                         while (trimmed[0] == ' ' || trimmed[0] == '\t')
4519                                 trimmed++;
4520                         while (trimmed[strlen(trimmed)-1] == '\n')
4521                                 trimmed[strlen(trimmed)-1] = '\0';
4522                         while (trimmed[strlen(trimmed)-1] == '\r')
4523                                 trimmed[strlen(trimmed)-1] = '\0';
4524                         while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
4525                                 trimmed[strlen(trimmed)-1] = '\0';
4526                         result = g_strdup(trimmed);
4527                         g_strfreev(parts);
4528                         fclose(fp);
4529                         if (needsterminal) {
4530                                 gchar *tmp = g_strdup_printf("xterm -e %s", result);
4531                                 g_free(result);
4532                                 result = tmp;
4533                         }
4534                         return result;
4535                 }
4536                 g_strfreev(parts);
4537         }
4538         fclose(fp);
4539         return NULL;
4540 }
4541 gchar *mailcap_get_command_for_type(const gchar *type, const gchar *file_to_open)
4542 {
4543         gchar *result = NULL;
4544         gchar *path = NULL;
4545         if (type == NULL)
4546                 return NULL;
4547         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
4548         result = mailcap_get_command_in_file(path, type, file_to_open);
4549         g_free(path);
4550         if (result)
4551                 return result;
4552         result = mailcap_get_command_in_file("/etc/mailcap", type, file_to_open);
4553         return result;
4554 }
4555
4556 void mailcap_update_default(const gchar *type, const gchar *command)
4557 {
4558         gchar *path = NULL, *outpath = NULL;
4559         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
4560         outpath = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap.new", NULL);
4561         FILE *fp = g_fopen(path, "rb");
4562         FILE *outfp = NULL;
4563         gchar buf[BUFFSIZE];
4564         gboolean err = FALSE;
4565
4566         if (!fp) {
4567                 fp = g_fopen(path, "a");
4568                 if (!fp) {
4569                         g_warning("failed to create file %s", path);
4570                         g_free(path);
4571                         g_free(outpath);
4572                         return;
4573                 }
4574                 fp = g_freopen(path, "rb", fp);
4575                 if (!fp) {
4576                         g_warning("failed to reopen file %s", path);
4577                         g_free(path);
4578                         g_free(outpath);
4579                         return;
4580                 }
4581         }
4582
4583         outfp = g_fopen(outpath, "wb");
4584         if (!outfp) {
4585                 g_warning("failed to create file %s", outpath);
4586                 g_free(path);
4587                 g_free(outpath);
4588                 fclose(fp);
4589                 return;
4590         }
4591         while (fp && fgets(buf, sizeof (buf), fp) != NULL) {
4592                 gchar **parts = g_strsplit(buf, ";", 3);
4593                 gchar *trimmed = parts[0];
4594                 while (trimmed[0] == ' ')
4595                         trimmed++;
4596                 while (trimmed[strlen(trimmed)-1] == ' ')
4597                         trimmed[strlen(trimmed)-1] = '\0';
4598
4599                 if (!strcmp(trimmed, type)) {
4600                         g_strfreev(parts);
4601                         continue;
4602                 }
4603                 else {
4604                         if(fputs(buf, outfp) == EOF) {
4605                                 err = TRUE;
4606                                 break;
4607                         }
4608                 }
4609                 g_strfreev(parts);
4610         }
4611         if (fprintf(outfp, "%s; %s\n", type, command) < 0)
4612                 err = TRUE;
4613
4614         if (fp)
4615                 fclose(fp);
4616
4617         if (fclose(outfp) == EOF)
4618                 err = TRUE;
4619
4620         if (!err)
4621                 g_rename(outpath, path);
4622
4623         g_free(path);
4624         g_free(outpath);
4625 }
4626
4627 gint copy_dir(const gchar *src, const gchar *dst)
4628 {
4629         GDir *dir;
4630         const gchar *name;
4631
4632         if ((dir = g_dir_open(src, 0, NULL)) == NULL) {
4633                 g_warning("failed to open directory: %s", src);
4634                 return -1;
4635         }
4636
4637         if (make_dir(dst) < 0)
4638                 return -1;
4639
4640         while ((name = g_dir_read_name(dir)) != NULL) {
4641                 gchar *old_file, *new_file;
4642                 old_file = g_strconcat(src, G_DIR_SEPARATOR_S, name, NULL);
4643                 new_file = g_strconcat(dst, G_DIR_SEPARATOR_S, name, NULL);
4644                 debug_print("copying: %s -> %s\n", old_file, new_file);
4645                 if (g_file_test(old_file, G_FILE_TEST_IS_REGULAR)) {
4646                         gint r = copy_file(old_file, new_file, TRUE);
4647                         if (r < 0) {
4648                                 g_dir_close(dir);
4649                                 return r;
4650                         }
4651                 }
4652 #ifndef G_OS_WIN32
4653                 /* Windows has no symlinks.  Or well, Vista seems to
4654                    have something like this but the semantics might be
4655                    different.  Thus we don't use it under Windows. */
4656                  else if (g_file_test(old_file, G_FILE_TEST_IS_SYMLINK)) {
4657                         GError *error = NULL;
4658                         gint r = 0;
4659                         gchar *target = g_file_read_link(old_file, &error);
4660                         if (target)
4661                                 r = symlink(target, new_file);
4662                         g_free(target);
4663                         if (r < 0) {
4664                                 g_dir_close(dir);
4665                                 return r;
4666                         }
4667                  }
4668 #endif /*G_OS_WIN32*/
4669                 else if (g_file_test(old_file, G_FILE_TEST_IS_DIR)) {
4670                         gint r = copy_dir(old_file, new_file);
4671                         if (r < 0) {
4672                                 g_dir_close(dir);
4673                                 return r;
4674                         }
4675                 }
4676         }
4677         g_dir_close(dir);
4678         return 0;
4679 }
4680
4681 /* crude test to see if a file is an email. */
4682 gboolean file_is_email (const gchar *filename)
4683 {
4684         FILE *fp = NULL;
4685         gchar buffer[2048];
4686         gint i = 0;
4687         gint score = 0;
4688         if (filename == NULL)
4689                 return FALSE;
4690         if ((fp = g_fopen(filename, "rb")) == NULL)
4691                 return FALSE;
4692         while (i < 60 && score < 3
4693                && fgets(buffer, sizeof (buffer), fp) != NULL) {
4694                 if (!strncmp(buffer, "From:", strlen("From:")))
4695                         score++;
4696                 else if (!strncmp(buffer, "Date:", strlen("Date:")))
4697                         score++;
4698                 else if (!strncmp(buffer, "Message-ID:", strlen("Message-ID:")))
4699                         score++;
4700                 else if (!strncmp(buffer, "Subject:", strlen("Subject:")))
4701                         score++;
4702                 i++;
4703         }
4704         fclose(fp);
4705         return (score >= 3);
4706 }
4707
4708 gboolean sc_g_list_bigger(GList *list, gint max)
4709 {
4710         GList *cur = list;
4711         int i = 0;
4712         while (cur && i <= max+1) {
4713                 i++;
4714                 cur = cur->next;
4715         }
4716         return (i > max);
4717 }
4718
4719 gboolean sc_g_slist_bigger(GSList *list, gint max)
4720 {
4721         GSList *cur = list;
4722         int i = 0;
4723         while (cur && i <= max+1) {
4724                 i++;
4725                 cur = cur->next;
4726         }
4727         return (i > max);
4728 }
4729
4730 const gchar *daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4731 const gchar *monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4732                              NULL, NULL, NULL, NULL, NULL, NULL};
4733 const gchar *s_daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4734 const gchar *s_monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4735                              NULL, NULL, NULL, NULL, NULL, NULL};
4736
4737 gint daynames_len[] =     {0,0,0,0,0,0,0};
4738 gint monthnames_len[] =   {0,0,0,0,0,0,
4739                                  0,0,0,0,0,0};
4740 gint s_daynames_len[] =   {0,0,0,0,0,0,0};
4741 gint s_monthnames_len[] = {0,0,0,0,0,0,
4742                                  0,0,0,0,0,0};
4743 const gchar *s_am_up = NULL;
4744 const gchar *s_pm_up = NULL;
4745 const gchar *s_am_low = NULL;
4746 const gchar *s_pm_low = NULL;
4747
4748 gint s_am_up_len = 0;
4749 gint s_pm_up_len = 0;
4750 gint s_am_low_len = 0;
4751 gint s_pm_low_len = 0;
4752
4753 static gboolean time_names_init_done = FALSE;
4754
4755 static void init_time_names(void)
4756 {
4757         int i = 0;
4758
4759         daynames[0] = C_("Complete day name for use by strftime", "Sunday");
4760         daynames[1] = C_("Complete day name for use by strftime", "Monday");
4761         daynames[2] = C_("Complete day name for use by strftime", "Tuesday");
4762         daynames[3] = C_("Complete day name for use by strftime", "Wednesday");
4763         daynames[4] = C_("Complete day name for use by strftime", "Thursday");
4764         daynames[5] = C_("Complete day name for use by strftime", "Friday");
4765         daynames[6] = C_("Complete day name for use by strftime", "Saturday");
4766
4767         monthnames[0] = C_("Complete month name for use by strftime", "January");
4768         monthnames[1] = C_("Complete month name for use by strftime", "February");
4769         monthnames[2] = C_("Complete month name for use by strftime", "March");
4770         monthnames[3] = C_("Complete month name for use by strftime", "April");
4771         monthnames[4] = C_("Complete month name for use by strftime", "May");
4772         monthnames[5] = C_("Complete month name for use by strftime", "June");
4773         monthnames[6] = C_("Complete month name for use by strftime", "July");
4774         monthnames[7] = C_("Complete month name for use by strftime", "August");
4775         monthnames[8] = C_("Complete month name for use by strftime", "September");
4776         monthnames[9] = C_("Complete month name for use by strftime", "October");
4777         monthnames[10] = C_("Complete month name for use by strftime", "November");
4778         monthnames[11] = C_("Complete month name for use by strftime", "December");
4779
4780         s_daynames[0] = C_("Abbr. day name for use by strftime", "Sun");
4781         s_daynames[1] = C_("Abbr. day name for use by strftime", "Mon");
4782         s_daynames[2] = C_("Abbr. day name for use by strftime", "Tue");
4783         s_daynames[3] = C_("Abbr. day name for use by strftime", "Wed");
4784         s_daynames[4] = C_("Abbr. day name for use by strftime", "Thu");
4785         s_daynames[5] = C_("Abbr. day name for use by strftime", "Fri");
4786         s_daynames[6] = C_("Abbr. day name for use by strftime", "Sat");
4787
4788         s_monthnames[0] = C_("Abbr. month name for use by strftime", "Jan");
4789         s_monthnames[1] = C_("Abbr. month name for use by strftime", "Feb");
4790         s_monthnames[2] = C_("Abbr. month name for use by strftime", "Mar");
4791         s_monthnames[3] = C_("Abbr. month name for use by strftime", "Apr");
4792         s_monthnames[4] = C_("Abbr. month name for use by strftime", "May");
4793         s_monthnames[5] = C_("Abbr. month name for use by strftime", "Jun");
4794         s_monthnames[6] = C_("Abbr. month name for use by strftime", "Jul");
4795         s_monthnames[7] = C_("Abbr. month name for use by strftime", "Aug");
4796         s_monthnames[8] = C_("Abbr. month name for use by strftime", "Sep");
4797         s_monthnames[9] = C_("Abbr. month name for use by strftime", "Oct");
4798         s_monthnames[10] = C_("Abbr. month name for use by strftime", "Nov");
4799         s_monthnames[11] = C_("Abbr. month name for use by strftime", "Dec");
4800
4801         for (i = 0; i < 7; i++) {
4802                 daynames_len[i] = strlen(daynames[i]);
4803                 s_daynames_len[i] = strlen(s_daynames[i]);
4804         }
4805         for (i = 0; i < 12; i++) {
4806                 monthnames_len[i] = strlen(monthnames[i]);
4807                 s_monthnames_len[i] = strlen(s_monthnames[i]);
4808         }
4809
4810         s_am_up = C_("For use by strftime (morning)", "AM");
4811         s_pm_up = C_("For use by strftime (afternoon)", "PM");
4812         s_am_low = C_("For use by strftime (morning, lowercase)", "am");
4813         s_pm_low = C_("For use by strftime (afternoon, lowercase)", "pm");
4814
4815         s_am_up_len = strlen(s_am_up);
4816         s_pm_up_len = strlen(s_pm_up);
4817         s_am_low_len = strlen(s_am_low);
4818         s_pm_low_len = strlen(s_pm_low);
4819
4820         time_names_init_done = TRUE;
4821 }
4822
4823 #define CHECK_SIZE() {                  \
4824         total_done += len;              \
4825         if (total_done >= buflen) {     \
4826                 buf[buflen-1] = '\0';   \
4827                 return 0;               \
4828         }                               \
4829 }
4830
4831 size_t fast_strftime(gchar *buf, gint buflen, const gchar *format, struct tm *lt)
4832 {
4833         gchar *curpos = buf;
4834         gint total_done = 0;
4835         gchar subbuf[64], subfmt[64];
4836         static time_t last_tzset = (time_t)0;
4837
4838         if (!time_names_init_done)
4839                 init_time_names();
4840
4841         if (format == NULL || lt == NULL)
4842                 return 0;
4843
4844         if (last_tzset != time(NULL)) {
4845                 tzset();
4846                 last_tzset = time(NULL);
4847         }
4848         while(*format) {
4849                 if (*format == '%') {
4850                         gint len = 0, tmp = 0;
4851                         format++;
4852                         switch(*format) {
4853                         case '%':
4854                                 len = 1; CHECK_SIZE();
4855                                 *curpos = '%';
4856                                 break;
4857                         case 'a':
4858                                 len = s_daynames_len[lt->tm_wday]; CHECK_SIZE();
4859                                 strncpy2(curpos, s_daynames[lt->tm_wday], buflen - total_done);
4860                                 break;
4861                         case 'A':
4862                                 len = daynames_len[lt->tm_wday]; CHECK_SIZE();
4863                                 strncpy2(curpos, daynames[lt->tm_wday], buflen - total_done);
4864                                 break;
4865                         case 'b':
4866                         case 'h':
4867                                 len = s_monthnames_len[lt->tm_mon]; CHECK_SIZE();
4868                                 strncpy2(curpos, s_monthnames[lt->tm_mon], buflen - total_done);
4869                                 break;
4870                         case 'B':
4871                                 len = monthnames_len[lt->tm_mon]; CHECK_SIZE();
4872                                 strncpy2(curpos, monthnames[lt->tm_mon], buflen - total_done);
4873                                 break;
4874                         case 'c':
4875                                 strftime(subbuf, 64, "%c", lt);
4876                                 len = strlen(subbuf); CHECK_SIZE();
4877                                 strncpy2(curpos, subbuf, buflen - total_done);
4878                                 break;
4879                         case 'C':
4880                                 total_done += 2; CHECK_SIZE();
4881                                 tmp = (lt->tm_year + 1900)/100;
4882                                 *curpos++ = '0'+(tmp / 10);
4883                                 *curpos++ = '0'+(tmp % 10);
4884                                 break;
4885                         case 'd':
4886                                 total_done += 2; CHECK_SIZE();
4887                                 *curpos++ = '0'+(lt->tm_mday / 10);
4888                                 *curpos++ = '0'+(lt->tm_mday % 10);
4889                                 break;
4890                         case 'D':
4891                                 total_done += 8; CHECK_SIZE();
4892                                 *curpos++ = '0'+((lt->tm_mon+1) / 10);
4893                                 *curpos++ = '0'+((lt->tm_mon+1) % 10);
4894                                 *curpos++ = '/';
4895                                 *curpos++ = '0'+(lt->tm_mday / 10);
4896                                 *curpos++ = '0'+(lt->tm_mday % 10);
4897                                 *curpos++ = '/';
4898                                 tmp = lt->tm_year%100;
4899                                 *curpos++ = '0'+(tmp / 10);
4900                                 *curpos++ = '0'+(tmp % 10);
4901                                 break;
4902                         case 'e':
4903                                 len = 2; CHECK_SIZE();
4904                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_mday);
4905                                 break;
4906                         case 'F':
4907                                 len = 10; CHECK_SIZE();
4908                                 snprintf(curpos, buflen - total_done, "%4d-%02d-%02d",
4909                                         lt->tm_year + 1900, lt->tm_mon +1, lt->tm_mday);
4910                                 break;
4911                         case 'H':
4912                                 total_done += 2; CHECK_SIZE();
4913                                 *curpos++ = '0'+(lt->tm_hour / 10);
4914                                 *curpos++ = '0'+(lt->tm_hour % 10);
4915                                 break;
4916                         case 'I':
4917                                 total_done += 2; CHECK_SIZE();
4918                                 tmp = lt->tm_hour;
4919                                 if (tmp > 12)
4920                                         tmp -= 12;
4921                                 else if (tmp == 0)
4922                                         tmp = 12;
4923                                 *curpos++ = '0'+(tmp / 10);
4924                                 *curpos++ = '0'+(tmp % 10);
4925                                 break;
4926                         case 'j':
4927                                 len = 3; CHECK_SIZE();
4928                                 snprintf(curpos, buflen - total_done, "%03d", lt->tm_yday+1);
4929                                 break;
4930                         case 'k':
4931                                 len = 2; CHECK_SIZE();
4932                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_hour);
4933                                 break;
4934                         case 'l':
4935                                 len = 2; CHECK_SIZE();
4936                                 tmp = lt->tm_hour;
4937                                 if (tmp > 12)
4938                                         tmp -= 12;
4939                                 else if (tmp == 0)
4940                                         tmp = 12;
4941                                 snprintf(curpos, buflen - total_done, "%2d", tmp);
4942                                 break;
4943                         case 'm':
4944                                 total_done += 2; CHECK_SIZE();
4945                                 tmp = lt->tm_mon + 1;
4946                                 *curpos++ = '0'+(tmp / 10);
4947                                 *curpos++ = '0'+(tmp % 10);
4948                                 break;
4949                         case 'M':
4950                                 total_done += 2; CHECK_SIZE();
4951                                 *curpos++ = '0'+(lt->tm_min / 10);
4952                                 *curpos++ = '0'+(lt->tm_min % 10);
4953                                 break;
4954                         case 'n':
4955                                 len = 1; CHECK_SIZE();
4956                                 *curpos = '\n';
4957                                 break;
4958                         case 'p':
4959                                 if (lt->tm_hour >= 12) {
4960                                         len = s_pm_up_len; CHECK_SIZE();
4961                                         snprintf(curpos, buflen-total_done, "%s", s_pm_up);
4962                                 } else {
4963                                         len = s_am_up_len; CHECK_SIZE();
4964                                         snprintf(curpos, buflen-total_done, "%s", s_am_up);
4965                                 }
4966                                 break;
4967                         case 'P':
4968                                 if (lt->tm_hour >= 12) {
4969                                         len = s_pm_low_len; CHECK_SIZE();
4970                                         snprintf(curpos, buflen-total_done, "%s", s_pm_low);
4971                                 } else {
4972                                         len = s_am_low_len; CHECK_SIZE();
4973                                         snprintf(curpos, buflen-total_done, "%s", s_am_low);
4974                                 }
4975                                 break;
4976                         case 'r':
4977                                 strftime(subbuf, 64, "%r", lt);
4978                                 len = strlen(subbuf); CHECK_SIZE();
4979                                 strncpy2(curpos, subbuf, buflen - total_done);
4980                                 break;
4981                         case 'R':
4982                                 total_done += 5; CHECK_SIZE();
4983                                 *curpos++ = '0'+(lt->tm_hour / 10);
4984                                 *curpos++ = '0'+(lt->tm_hour % 10);
4985                                 *curpos++ = ':';
4986                                 *curpos++ = '0'+(lt->tm_min / 10);
4987                                 *curpos++ = '0'+(lt->tm_min % 10);
4988                                 break;
4989                         case 's':
4990                                 snprintf(subbuf, 64, "%lld", (long long)mktime(lt));
4991                                 len = strlen(subbuf); CHECK_SIZE();
4992                                 strncpy2(curpos, subbuf, buflen - total_done);
4993                                 break;
4994                         case 'S':
4995                                 total_done += 2; CHECK_SIZE();
4996                                 *curpos++ = '0'+(lt->tm_sec / 10);
4997                                 *curpos++ = '0'+(lt->tm_sec % 10);
4998                                 break;
4999                         case 't':
5000                                 len = 1; CHECK_SIZE();
5001                                 *curpos = '\t';
5002                                 break;
5003                         case 'T':
5004                                 total_done += 8; CHECK_SIZE();
5005                                 *curpos++ = '0'+(lt->tm_hour / 10);
5006                                 *curpos++ = '0'+(lt->tm_hour % 10);
5007                                 *curpos++ = ':';
5008                                 *curpos++ = '0'+(lt->tm_min / 10);
5009                                 *curpos++ = '0'+(lt->tm_min % 10);
5010                                 *curpos++ = ':';
5011                                 *curpos++ = '0'+(lt->tm_sec / 10);
5012                                 *curpos++ = '0'+(lt->tm_sec % 10);
5013                                 break;
5014                         case 'u':
5015                                 len = 1; CHECK_SIZE();
5016                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday == 0 ? 7: lt->tm_wday);
5017                                 break;
5018                         case 'w':
5019                                 len = 1; CHECK_SIZE();
5020                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday);
5021                                 break;
5022                         case 'x':
5023                                 strftime(subbuf, 64, "%x", lt);
5024                                 len = strlen(subbuf); CHECK_SIZE();
5025                                 strncpy2(curpos, subbuf, buflen - total_done);
5026                                 break;
5027                         case 'X':
5028                                 strftime(subbuf, 64, "%X", lt);
5029                                 len = strlen(subbuf); CHECK_SIZE();
5030                                 strncpy2(curpos, subbuf, buflen - total_done);
5031                                 break;
5032                         case 'y':
5033                                 total_done += 2; CHECK_SIZE();
5034                                 tmp = lt->tm_year%100;
5035                                 *curpos++ = '0'+(tmp / 10);
5036                                 *curpos++ = '0'+(tmp % 10);
5037                                 break;
5038                         case 'Y':
5039                                 len = 4; CHECK_SIZE();
5040                                 snprintf(curpos, buflen - total_done, "%4d", lt->tm_year + 1900);
5041                                 break;
5042                         case 'G':
5043                         case 'g':
5044                         case 'U':
5045                         case 'V':
5046                         case 'W':
5047                         case 'z':
5048                         case 'Z':
5049                         case '+':
5050                                 /* let these complicated ones be done with the libc */
5051                                 snprintf(subfmt, 64, "%%%c", *format);
5052                                 strftime(subbuf, 64, subfmt, lt);
5053                                 len = strlen(subbuf); CHECK_SIZE();
5054                                 strncpy2(curpos, subbuf, buflen - total_done);
5055                                 break;
5056                         case 'E':
5057                         case 'O':
5058                                 /* let these complicated modifiers be done with the libc */
5059                                 snprintf(subfmt, 64, "%%%c%c", *format, *(format+1));
5060                                 strftime(subbuf, 64, subfmt, lt);
5061                                 len = strlen(subbuf); CHECK_SIZE();
5062                                 strncpy2(curpos, subbuf, buflen - total_done);
5063                                 format++;
5064                                 break;
5065                         default:
5066                                 g_warning("format error (%c)", *format);
5067                                 *curpos = '\0';
5068                                 return total_done;
5069                         }
5070                         curpos += len;
5071                         format++;
5072                 } else {
5073                         int len = 1; CHECK_SIZE();
5074                         *curpos++ = *format++;
5075                 }
5076         }
5077         *curpos = '\0';
5078         return total_done;
5079 }
5080
5081 gboolean prefs_common_get_use_shred(void);
5082
5083
5084 #ifdef G_OS_WIN32
5085 #define WEXITSTATUS(x) (x)
5086 #endif
5087
5088 int claws_unlink(const gchar *filename)
5089 {
5090         GStatBuf s;
5091         static int found_shred = -1;
5092         static const gchar *args[4];
5093
5094         if (filename == NULL)
5095                 return 0;
5096
5097         if (prefs_common_get_use_shred()) {
5098                 if (found_shred == -1) {
5099                         /* init */
5100                         args[0] = g_find_program_in_path("shred");
5101                         debug_print("found shred: %s\n", args[0]);
5102                         found_shred = (args[0] != NULL) ? 1:0;
5103                         args[1] = "-f";
5104                         args[3] = NULL;
5105                 }
5106                 if (found_shred == 1) {
5107                         if (g_stat(filename, &s) == 0 && S_ISREG(s.st_mode)) {
5108                                 if (s.st_nlink == 1) {
5109                                         gint status=0;
5110                                         args[2] = filename;
5111                                         g_spawn_sync(NULL, (gchar **)args, NULL, 0,
5112                                          NULL, NULL, NULL, NULL, &status, NULL);
5113                                         debug_print("%s %s exited with status %d\n",
5114                                                 args[0], filename, WEXITSTATUS(status));
5115                                         if (truncate(filename, 0) < 0)
5116                                                 g_warning("couln't truncate: %s", filename);
5117                                 }
5118                         }
5119                 }
5120         }
5121         return g_unlink(filename);
5122 }
5123
5124 GMutex *cm_mutex_new(void) {
5125 #if GLIB_CHECK_VERSION(2,32,0)
5126         GMutex *m = g_new0(GMutex, 1);
5127         g_mutex_init(m);
5128         return m;
5129 #else
5130         return g_mutex_new();
5131 #endif
5132 }
5133
5134 void cm_mutex_free(GMutex *mutex) {
5135 #if GLIB_CHECK_VERSION(2,32,0)
5136         g_mutex_clear(mutex);
5137         g_free(mutex);
5138 #else
5139         g_mutex_free(mutex);
5140 #endif
5141 }
5142
5143 static gchar *canonical_list_to_file(GSList *list)
5144 {
5145         GString *result = g_string_new(NULL);
5146         GSList *pathlist = g_slist_reverse(g_slist_copy(list));
5147         GSList *cur;
5148         gchar *str;
5149
5150 #ifndef G_OS_WIN32
5151         result = g_string_append(result, G_DIR_SEPARATOR_S);
5152 #else
5153         if (pathlist->data) {
5154                 const gchar *root = (gchar *)pathlist->data;
5155                 if (root[0] != '\0' && g_ascii_isalpha(root[0]) &&
5156                     root[1] == ':') {
5157                         /* drive - don't prepend dir separator */
5158                 } else {
5159                         result = g_string_append(result, G_DIR_SEPARATOR_S);
5160                 }
5161         }
5162 #endif
5163
5164         for (cur = pathlist; cur; cur = cur->next) {
5165                 result = g_string_append(result, (gchar *)cur->data);
5166                 if (cur->next)
5167                         result = g_string_append(result, G_DIR_SEPARATOR_S);
5168         }
5169         g_slist_free(pathlist);
5170
5171         str = result->str;
5172         g_string_free(result, FALSE);
5173
5174         return str;
5175 }
5176
5177 static GSList *cm_split_path(const gchar *filename, int depth)
5178 {
5179         gchar **path_parts;
5180         GSList *canonical_parts = NULL;
5181         GStatBuf st;
5182         int i;
5183 #ifndef G_OS_WIN32
5184         gboolean follow_symlinks = TRUE;
5185 #endif
5186
5187         if (depth > 32) {
5188 #ifndef G_OS_WIN32
5189                 errno = ELOOP;
5190 #else
5191                 errno = EINVAL; /* can't happen, no symlink handling */
5192 #endif
5193                 return NULL;
5194         }
5195
5196         if (!g_path_is_absolute(filename)) {
5197                 errno =EINVAL;
5198                 return NULL;
5199         }
5200
5201         path_parts = g_strsplit(filename, G_DIR_SEPARATOR_S, -1);
5202
5203         for (i = 0; path_parts[i] != NULL; i++) {
5204                 if (!strcmp(path_parts[i], ""))
5205                         continue;
5206                 if (!strcmp(path_parts[i], "."))
5207                         continue;
5208                 else if (!strcmp(path_parts[i], "..")) {
5209                         if (i == 0) {
5210                                 errno =ENOTDIR;
5211                                 return NULL;
5212                         }
5213                         else /* Remove the last inserted element */
5214                                 canonical_parts =
5215                                         g_slist_delete_link(canonical_parts,
5216                                                             canonical_parts);
5217                 } else {
5218                         gchar *tmp_path;
5219
5220                         canonical_parts = g_slist_prepend(canonical_parts,
5221                                                 g_strdup(path_parts[i]));
5222
5223                         tmp_path = canonical_list_to_file(canonical_parts);
5224
5225                         if(g_stat(tmp_path, &st) < 0) {
5226                                 if (errno == ENOENT) {
5227                                         errno = 0;
5228 #ifndef G_OS_WIN32
5229                                         follow_symlinks = FALSE;
5230 #endif
5231                                 }
5232                                 if (errno != 0) {
5233                                         g_free(tmp_path);
5234                                         slist_free_strings_full(canonical_parts);
5235                                         g_strfreev(path_parts);
5236
5237                                         return NULL;
5238                                 }
5239                         }
5240 #ifndef G_OS_WIN32
5241                         if (follow_symlinks && g_file_test(tmp_path, G_FILE_TEST_IS_SYMLINK)) {
5242                                 GError *error = NULL;
5243                                 gchar *target = g_file_read_link(tmp_path, &error);
5244
5245                                 if (!g_path_is_absolute(target)) {
5246                                         /* remove the last inserted element */
5247                                         canonical_parts =
5248                                                 g_slist_delete_link(canonical_parts,
5249                                                             canonical_parts);
5250                                         /* add the target */
5251                                         canonical_parts = g_slist_prepend(canonical_parts,
5252                                                 g_strdup(target));
5253                                         g_free(target);
5254
5255                                         /* and get the new target */
5256                                         target = canonical_list_to_file(canonical_parts);
5257                                 }
5258
5259                                 /* restart from absolute target */
5260                                 slist_free_strings_full(canonical_parts);
5261                                 canonical_parts = NULL;
5262                                 if (!error)
5263                                         canonical_parts = cm_split_path(target, depth + 1);
5264                                 else
5265                                         g_error_free(error);
5266                                 if (canonical_parts == NULL) {
5267                                         g_free(tmp_path);
5268                                         g_strfreev(path_parts);
5269                                         return NULL;
5270                                 }
5271                                 g_free(target);
5272                         }
5273 #endif
5274                         g_free(tmp_path);
5275                 }
5276         }
5277         g_strfreev(path_parts);
5278         return canonical_parts;
5279 }
5280
5281 /*
5282  * Canonicalize a filename, resolving symlinks along the way.
5283  * Returns a negative errno in case of error.
5284  */
5285 int cm_canonicalize_filename(const gchar *filename, gchar **canonical_name) {
5286         GSList *canonical_parts;
5287         gboolean is_absolute;
5288
5289         if (filename == NULL)
5290                 return -EINVAL;
5291         if (canonical_name == NULL)
5292                 return -EINVAL;
5293         *canonical_name = NULL;
5294
5295         is_absolute = g_path_is_absolute(filename);
5296         if (!is_absolute) {
5297                 /* Always work on absolute filenames. */
5298                 gchar *cur = g_get_current_dir();
5299                 gchar *absolute_filename = g_strconcat(cur, G_DIR_SEPARATOR_S,
5300                                                        filename, NULL);
5301
5302                 canonical_parts = cm_split_path(absolute_filename, 0);
5303                 g_free(absolute_filename);
5304                 g_free(cur);
5305         } else
5306                 canonical_parts = cm_split_path(filename, 0);
5307
5308         if (canonical_parts == NULL)
5309                 return -errno;
5310
5311         *canonical_name = canonical_list_to_file(canonical_parts);
5312         slist_free_strings_full(canonical_parts);
5313         return 0;
5314 }
5315
5316 /* Returns a decoded base64 string, guaranteed to be null-terminated. */
5317 guchar *g_base64_decode_zero(const gchar *text, gsize *out_len)
5318 {
5319         gchar *tmp = g_base64_decode(text, out_len);
5320         gchar *out = g_strndup(tmp, *out_len);
5321
5322         g_free(tmp);
5323
5324         if (strlen(out) != *out_len) {
5325                 g_warning ("strlen(out) %zd != *out_len %" G_GSIZE_FORMAT, strlen(out), *out_len);
5326         }
5327
5328         return out;
5329 }
5330
5331 #if !GLIB_CHECK_VERSION(2, 30, 0)
5332 /**
5333  * g_utf8_substring:
5334  * @str: a UTF-8 encoded string
5335  * @start_pos: a character offset within @str
5336  * @end_pos: another character offset within @str
5337  *
5338  * Copies a substring out of a UTF-8 encoded string.
5339  * The substring will contain @end_pos - @start_pos
5340  * characters.
5341  *
5342  * Returns: a newly allocated copy of the requested
5343  *     substring. Free with g_free() when no longer needed.
5344  *
5345  * Since: GLIB 2.30
5346  */
5347 gchar *
5348 g_utf8_substring (const gchar *str,
5349                                   glong            start_pos,
5350                                   glong            end_pos)
5351 {
5352   gchar *start, *end, *out;
5353
5354   start = g_utf8_offset_to_pointer (str, start_pos);
5355   end = g_utf8_offset_to_pointer (start, end_pos - start_pos);
5356
5357   out = g_malloc (end - start + 1);
5358   memcpy (out, start, end - start);
5359   out[end - start] = 0;
5360
5361   return out;
5362 }
5363 #endif
5364
5365 /* Attempts to read count bytes from a PRNG into memory area starting at buf.
5366  * It is up to the caller to make sure there is at least count bytes
5367  * available at buf. */
5368 gboolean
5369 get_random_bytes(void *buf, size_t count)
5370 {
5371         /* Open our prng source. */
5372 #if defined G_OS_WIN32
5373         HCRYPTPROV rnd;
5374
5375         if (!CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, 0) &&
5376                         !CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
5377                 debug_print("Could not acquire a CSP handle.\n");
5378                 return FALSE;
5379         }
5380 #else
5381         int rnd;
5382         ssize_t ret;
5383
5384         rnd = open("/dev/urandom", O_RDONLY);
5385         if (rnd == -1) {
5386                 FILE_OP_ERROR("/dev/urandom", "open");
5387                 debug_print("Could not open /dev/urandom.\n");
5388                 return FALSE;
5389         }
5390 #endif
5391
5392         /* Read data from the source into buf. */
5393 #if defined G_OS_WIN32
5394         if (!CryptGenRandom(rnd, count, buf)) {
5395                 debug_print("Could not read %zd random bytes.\n", count);
5396                 CryptReleaseContext(rnd, 0);
5397                 return FALSE;
5398         }
5399 #else
5400         ret = read(rnd, buf, count);
5401         if (ret != count) {
5402                 FILE_OP_ERROR("/dev/urandom", "read");
5403                 debug_print("Could not read enough data from /dev/urandom, read only %ld of %lu bytes.\n", ret, count);
5404                 close(rnd);
5405                 return FALSE;
5406         }
5407 #endif
5408
5409         /* Close the prng source. */
5410 #if defined G_OS_WIN32
5411         CryptReleaseContext(rnd, 0);
5412 #else
5413         close(rnd);
5414 #endif
5415
5416         return TRUE;
5417 }