src/common/utils.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2020 The Claws Mail Team and Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 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 #ifdef G_OS_WIN32
  53 #  include <ws2tcpip.h>
  54 #else
  55 #  include <sys/socket.h>
  56 #endif
  57
  58 #if (HAVE_WCTYPE_H && HAVE_WCHAR_H)
  59 #  include <wchar.h>
  60 #  include <wctype.h>
  61 #endif
  62 #include <stdlib.h>
  63 #include <sys/stat.h>
  64 #include <unistd.h>
  65 #include <stdarg.h>
  66 #include <sys/types.h>
  67 #if HAVE_SYS_WAIT_H
  68 #  include <sys/wait.h>
  69 #endif
  70 #include <dirent.h>
  71 #include <time.h>
  72 #include <regex.h>
  73
  74 #ifdef G_OS_UNIX
  75 #include <sys/utsname.h>
  76 #endif
  77
  78 #include <fcntl.h>
  79
  80 #ifdef G_OS_WIN32
  81 #  include <direct.h>
  82 #  include <io.h>
  83 #  include <w32lib.h>
  84 #endif
  85
  86 #include "utils.h"
  87 #include "socket.h"
  88 #include "codeconv.h"
  89 #include "tlds.h"
  90 #include "timing.h"
  91 #include "file-utils.h"
  92
  93 #define BUFFSIZE        8192
  94
  95 static gboolean debug_mode = FALSE;
  96
  97 GSList *slist_copy_deep(GSList *list, GCopyFunc func)
  98 {
  99 #if GLIB_CHECK_VERSION(2, 34, 0)
 100         return g_slist_copy_deep(list, func, NULL);
 101 #else
 102         GSList *res = g_slist_copy(list);
 103         GSList *walk = res;
 104         while (walk) {
 105                 walk->data = func(walk->data, NULL);
 106                 walk = walk->next;
 107         }
 108         return res;
 109 #endif
 110 }
 111
 112 void list_free_strings_full(GList *list)
 113 {
 114         g_list_free_full(list, (GDestroyNotify)g_free);
 115 }
 116
 117 void slist_free_strings_full(GSList *list)
 118 {
 119         g_slist_free_full(list, (GDestroyNotify)g_free);
 120 }
 121
 122 static void hash_free_strings_func(gpointer key, gpointer value, gpointer data)
 123 {
 124         g_free(key);
 125 }
 126
 127 void hash_free_strings(GHashTable *table)
 128 {
 129         g_hash_table_foreach(table, hash_free_strings_func, NULL);
 130 }
 131
 132 gint str_case_equal(gconstpointer v, gconstpointer v2)
 133 {
 134         return g_ascii_strcasecmp((const gchar *)v, (const gchar *)v2) == 0;
 135 }
 136
 137 guint str_case_hash(gconstpointer key)
 138 {
 139         const gchar *p = key;
 140         guint h = *p;
 141
 142         if (h) {
 143                 h = g_ascii_tolower(h);
 144                 for (p += 1; *p != '\0'; p++)
 145                         h = (h << 5) - h + g_ascii_tolower(*p);
 146         }
 147
 148         return h;
 149 }
 150
 151 gint to_number(const gchar *nstr)
 152 {
 153         register const gchar *p;
 154
 155         if (*nstr == '\0') return -1;
 156
 157         for (p = nstr; *p != '\0'; p++)
 158                 if (!g_ascii_isdigit(*p)) return -1;
 159
 160         return atoi(nstr);
 161 }
 162
 163 /* convert integer into string,
 164    nstr must be not lower than 11 characters length */
 165 gchar *itos_buf(gchar *nstr, gint n)
 166 {
 167         g_snprintf(nstr, 11, "%d", n);
 168         return nstr;
 169 }
 170
 171 /* convert integer into string */
 172 gchar *itos(gint n)
 173 {
 174         static gchar nstr[11];
 175
 176         return itos_buf(nstr, n);
 177 }
 178
 179 #define divide(num,divisor,i,d)         \
 180 {                                       \
 181         i = num >> divisor;             \
 182         d = num & ((1<<divisor)-1);     \
 183         d = (d*100) >> divisor;         \
 184 }
 185
 186
 187 /*!
 188  * \brief Convert a given size in bytes in a human-readable string
 189  *
 190  * \param size  The size expressed in bytes to convert in string
 191  * \return      The string that respresents the size in an human-readable way
 192  */
 193 gchar *to_human_readable(goffset size)
 194 {
 195         static gchar str[14];
 196         static gchar *b_format = NULL, *kb_format = NULL,
 197                      *mb_format = NULL, *gb_format = NULL;
 198         register int t = 0, r = 0;
 199         if (b_format == NULL) {
 200                 b_format  = _("%dB");
 201                 kb_format = _("%d.%02dKB");
 202                 mb_format = _("%d.%02dMB");
 203                 gb_format = _("%.2fGB");
 204         }
 205
 206         if (size < (goffset)1024) {
 207                 g_snprintf(str, sizeof(str), b_format, (gint)size);
 208                 return str;
 209         } else if (size >> 10 < (goffset)1024) {
 210                 divide(size, 10, t, r);
 211                 g_snprintf(str, sizeof(str), kb_format, t, r);
 212                 return str;
 213         } else if (size >> 20 < (goffset)1024) {
 214                 divide(size, 20, t, r);
 215                 g_snprintf(str, sizeof(str), mb_format, t, r);
 216                 return str;
 217         } else {
 218                 g_snprintf(str, sizeof(str), gb_format, (gfloat)(size >> 30));
 219                 return str;
 220         }
 221 }
 222
 223 /* compare paths */
 224 gint path_cmp(const gchar *s1, const gchar *s2)
 225 {
 226         gint len1, len2;
 227         int rc;
 228 #ifdef G_OS_WIN32
 229         gchar *s1buf, *s2buf;
 230 #endif
 231
 232         if (s1 == NULL || s2 == NULL) return -1;
 233         if (*s1 == '\0' || *s2 == '\0') return -1;
 234
 235 #ifdef G_OS_WIN32
 236         s1buf = g_strdup (s1);
 237         s2buf = g_strdup (s2);
 238         subst_char (s1buf, '/', G_DIR_SEPARATOR);
 239         subst_char (s2buf, '/', G_DIR_SEPARATOR);
 240         s1 = s1buf;
 241         s2 = s2buf;
 242 #endif /* !G_OS_WIN32 */
 243
 244         len1 = strlen(s1);
 245         len2 = strlen(s2);
 246
 247         if (s1[len1 - 1] == G_DIR_SEPARATOR) len1--;
 248         if (s2[len2 - 1] == G_DIR_SEPARATOR) len2--;
 249
 250         rc = strncmp(s1, s2, MAX(len1, len2));
 251 #ifdef G_OS_WIN32
 252         g_free (s1buf);
 253         g_free (s2buf);
 254 #endif /* !G_OS_WIN32 */
 255         return rc;
 256 }
 257
 258 /* remove trailing return code */
 259 gchar *strretchomp(gchar *str)
 260 {
 261         register gchar *s;
 262
 263         if (!*str) return str;
 264
 265         for (s = str + strlen(str) - 1;
 266              s >= str && (*s == '\n' || *s == '\r');
 267              s--)
 268                 *s = '\0';
 269
 270         return str;
 271 }
 272
 273 /* remove trailing character */
 274 gchar *strtailchomp(gchar *str, gchar tail_char)
 275 {
 276         register gchar *s;
 277
 278         if (!*str) return str;
 279         if (tail_char == '\0') return str;
 280
 281         for (s = str + strlen(str) - 1; s >= str && *s == tail_char; s--)
 282                 *s = '\0';
 283
 284         return str;
 285 }
 286
 287 /* remove CR (carriage return) */
 288 gchar *strcrchomp(gchar *str)
 289 {
 290         register gchar *s;
 291
 292         if (!*str) return str;
 293
 294         s = str + strlen(str) - 1;
 295         if (*s == '\n' && s > str && *(s - 1) == '\r') {
 296                 *(s - 1) = '\n';
 297                 *s = '\0';
 298         }
 299
 300         return str;
 301 }
 302
 303 #ifndef HAVE_STRCASESTR
 304 /* Similar to `strstr' but this function ignores the case of both strings.  */
 305 gchar *strcasestr(const gchar *haystack, const gchar *needle)
 306 {
 307         size_t haystack_len = strlen(haystack);
 308
 309         return strncasestr(haystack, haystack_len, needle);
 310 }
 311 #endif /* HAVE_STRCASESTR */
 312
 313 gchar *strncasestr(const gchar *haystack, gint haystack_len, const gchar *needle)
 314 {
 315         register size_t needle_len;
 316
 317         needle_len   = strlen(needle);
 318
 319         if (haystack_len < needle_len || needle_len == 0)
 320                 return NULL;
 321
 322         while (haystack_len >= needle_len) {
 323                 if (!g_ascii_strncasecmp(haystack, needle, needle_len))
 324                         return (gchar *)haystack;
 325                 else {
 326                         haystack++;
 327                         haystack_len--;
 328                 }
 329         }
 330
 331         return NULL;
 332 }
 333
 334 gpointer my_memmem(gconstpointer haystack, size_t haystacklen,
 335                    gconstpointer needle, size_t needlelen)
 336 {
 337         const gchar *haystack_ = (const gchar *)haystack;
 338         const gchar *needle_ = (const gchar *)needle;
 339         const gchar *haystack_cur = (const gchar *)haystack;
 340         size_t haystack_left = haystacklen;
 341
 342         if (needlelen == 1)
 343                 return memchr(haystack_, *needle_, haystacklen);
 344
 345         while ((haystack_cur = memchr(haystack_cur, *needle_, haystack_left))
 346                != NULL) {
 347                 if (haystacklen - (haystack_cur - haystack_) < needlelen)
 348                         break;
 349                 if (memcmp(haystack_cur + 1, needle_ + 1, needlelen - 1) == 0)
 350                         return (gpointer)haystack_cur;
 351                 else{
 352                         haystack_cur++;
 353                         haystack_left = haystacklen - (haystack_cur - haystack_);
 354                 }
 355         }
 356
 357         return NULL;
 358 }
 359
 360 /* Copy no more than N characters of SRC to DEST, with NULL terminating.  */
 361 gchar *strncpy2(gchar *dest, const gchar *src, size_t n)
 362 {
 363         register const gchar *s = src;
 364         register gchar *d = dest;
 365
 366         while (--n && *s)
 367                 *d++ = *s++;
 368         *d = '\0';
 369
 370         return dest;
 371 }
 372
 373
 374 /* Examine if next block is non-ASCII string */
 375 gboolean is_next_nonascii(const gchar *s)
 376 {
 377         const gchar *p;
 378
 379         /* skip head space */
 380         for (p = s; *p != '\0' && g_ascii_isspace(*p); p++)
 381                 ;
 382         for (; *p != '\0' && !g_ascii_isspace(*p); p++) {
 383                 if (*(guchar *)p > 127 || *(guchar *)p < 32)
 384                         return TRUE;
 385         }
 386
 387         return FALSE;
 388 }
 389
 390 gint get_next_word_len(const gchar *s)
 391 {
 392         gint len = 0;
 393
 394         for (; *s != '\0' && !g_ascii_isspace(*s); s++, len++)
 395                 ;
 396
 397         return len;
 398 }
 399
 400 static void trim_subject_for_compare(gchar *str)
 401 {
 402         gchar *srcp;
 403
 404         eliminate_parenthesis(str, '[', ']');
 405         eliminate_parenthesis(str, '(', ')');
 406         g_strstrip(str);
 407
 408         srcp = str + subject_get_prefix_length(str);
 409         if (srcp != str)
 410                 memmove(str, srcp, strlen(srcp) + 1);
 411 }
 412
 413 static void trim_subject_for_sort(gchar *str)
 414 {
 415         gchar *srcp;
 416
 417         g_strstrip(str);
 418
 419         srcp = str + subject_get_prefix_length(str);
 420         if (srcp != str)
 421                 memmove(str, srcp, strlen(srcp) + 1);
 422 }
 423
 424 /* compare subjects */
 425 gint subject_compare(const gchar *s1, const gchar *s2)
 426 {
 427         gchar *str1, *str2;
 428
 429         if (!s1 || !s2) return -1;
 430         if (!*s1 || !*s2) return -1;
 431
 432         Xstrdup_a(str1, s1, return -1);
 433         Xstrdup_a(str2, s2, return -1);
 434
 435         trim_subject_for_compare(str1);
 436         trim_subject_for_compare(str2);
 437
 438         if (!*str1 || !*str2) return -1;
 439
 440         return strcmp(str1, str2);
 441 }
 442
 443 gint subject_compare_for_sort(const gchar *s1, const gchar *s2)
 444 {
 445         gchar *str1, *str2;
 446
 447         if (!s1 || !s2) return -1;
 448
 449         Xstrdup_a(str1, s1, return -1);
 450         Xstrdup_a(str2, s2, return -1);
 451
 452         trim_subject_for_sort(str1);
 453         trim_subject_for_sort(str2);
 454
 455         return g_utf8_collate(str1, str2);
 456 }
 457
 458 void trim_subject(gchar *str)
 459 {
 460         register gchar *srcp;
 461         gchar op, cl;
 462         gint in_brace;
 463
 464         g_strstrip(str);
 465
 466         srcp = str + subject_get_prefix_length(str);
 467
 468         if (*srcp == '[') {
 469                 op = '[';
 470                 cl = ']';
 471         } else if (*srcp == '(') {
 472                 op = '(';
 473                 cl = ')';
 474         } else
 475                 op = 0;
 476
 477         if (op) {
 478                 ++srcp;
 479                 in_brace = 1;
 480                 while (*srcp) {
 481                         if (*srcp == op)
 482                                 in_brace++;
 483                         else if (*srcp == cl)
 484                                 in_brace--;
 485                         srcp++;
 486                         if (in_brace == 0)
 487                                 break;
 488                 }
 489         }
 490         while (g_ascii_isspace(*srcp)) srcp++;
 491         memmove(str, srcp, strlen(srcp) + 1);
 492 }
 493
 494 void eliminate_parenthesis(gchar *str, gchar op, gchar cl)
 495 {
 496         register gchar *srcp, *destp;
 497         gint in_brace;
 498
 499         destp = str;
 500
 501         while ((destp = strchr(destp, op))) {
 502                 in_brace = 1;
 503                 srcp = destp + 1;
 504                 while (*srcp) {
 505                         if (*srcp == op)
 506                                 in_brace++;
 507                         else if (*srcp == cl)
 508                                 in_brace--;
 509                         srcp++;
 510                         if (in_brace == 0)
 511                                 break;
 512                 }
 513                 while (g_ascii_isspace(*srcp)) srcp++;
 514                 memmove(destp, srcp, strlen(srcp) + 1);
 515         }
 516 }
 517
 518 void extract_parenthesis(gchar *str, gchar op, gchar cl)
 519 {
 520         register gchar *srcp, *destp;
 521         gint in_brace;
 522
 523         destp = str;
 524
 525         while ((srcp = strchr(destp, op))) {
 526                 if (destp > str)
 527                         *destp++ = ' ';
 528                 memmove(destp, srcp + 1, strlen(srcp));
 529                 in_brace = 1;
 530                 while(*destp) {
 531                         if (*destp == op)
 532                                 in_brace++;
 533                         else if (*destp == cl)
 534                                 in_brace--;
 535
 536                         if (in_brace == 0)
 537                                 break;
 538
 539                         destp++;
 540                 }
 541         }
 542         *destp = '\0';
 543 }
 544
 545 static void extract_parenthesis_with_skip_quote(gchar *str, gchar quote_chr,
 546                                          gchar op, gchar cl)
 547 {
 548         register gchar *srcp, *destp;
 549         gint in_brace;
 550         gboolean in_quote = FALSE;
 551
 552         destp = str;
 553
 554         while ((srcp = strchr_with_skip_quote(destp, quote_chr, op))) {
 555                 if (destp > str)
 556                         *destp++ = ' ';
 557                 memmove(destp, srcp + 1, strlen(srcp));
 558                 in_brace = 1;
 559                 while(*destp) {
 560                         if (*destp == op && !in_quote)
 561                                 in_brace++;
 562                         else if (*destp == cl && !in_quote)
 563                                 in_brace--;
 564                         else if (*destp == quote_chr)
 565                                 in_quote ^= TRUE;
 566
 567                         if (in_brace == 0)
 568                                 break;
 569
 570                         destp++;
 571                 }
 572         }
 573         *destp = '\0';
 574 }
 575
 576 void extract_quote(gchar *str, gchar quote_chr)
 577 {
 578         register gchar *p;
 579
 580         if ((str = strchr(str, quote_chr))) {
 581                 p = str;
 582                 while ((p = strchr(p + 1, quote_chr)) && (p[-1] == '\\')) {
 583                         memmove(p - 1, p, strlen(p) + 1);
 584                         p--;
 585                 }
 586                 if(p) {
 587                         *p = '\0';
 588                         memmove(str, str + 1, p - str);
 589                 }
 590         }
 591 }
 592
 593 /* Returns a newly allocated string with all quote_chr not at the beginning
 594    or the end of str escaped with '\' or the given str if not required. */
 595 gchar *escape_internal_quotes(gchar *str, gchar quote_chr)
 596 {
 597         register gchar *p, *q;
 598         gchar *qstr;
 599         int k = 0, l = 0;
 600
 601         if (str == NULL || *str == '\0')
 602                 return str;
 603
 604         /* search for unescaped quote_chr */
 605         p = str;
 606         if (*p == quote_chr)
 607                 ++p, ++l;
 608         while (*p) {
 609                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 610                         ++k;
 611                 ++p, ++l;
 612         }
 613         if (!k) /* nothing to escape */
 614                 return str;
 615
 616         /* unescaped quote_chr found */
 617         qstr = g_malloc(l + k + 1);
 618         p = str;
 619         q = qstr;
 620         if (*p == quote_chr) {
 621                 *q = quote_chr;
 622                 ++p, ++q;
 623         }
 624         while (*p) {
 625                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 626                         *q++ = '\\';
 627                 *q++ = *p++;
 628         }
 629         *q = '\0';
 630
 631         return qstr;
 632 }
 633
 634 void eliminate_address_comment(gchar *str)
 635 {
 636         register gchar *srcp, *destp;
 637         gint in_brace;
 638
 639         destp = str;
 640
 641         while ((destp = strchr(destp, '"'))) {
 642                 if ((srcp = strchr(destp + 1, '"'))) {
 643                         srcp++;
 644                         if (*srcp == '@') {
 645                                 destp = srcp + 1;
 646                         } else {
 647                                 while (g_ascii_isspace(*srcp)) srcp++;
 648                                 memmove(destp, srcp, strlen(srcp) + 1);
 649                         }
 650                 } else {
 651                         *destp = '\0';
 652                         break;
 653                 }
 654         }
 655
 656         destp = str;
 657
 658         while ((destp = strchr_with_skip_quote(destp, '"', '('))) {
 659                 in_brace = 1;
 660                 srcp = destp + 1;
 661                 while (*srcp) {
 662                         if (*srcp == '(')
 663                                 in_brace++;
 664                         else if (*srcp == ')')
 665                                 in_brace--;
 666                         srcp++;
 667                         if (in_brace == 0)
 668                                 break;
 669                 }
 670                 while (g_ascii_isspace(*srcp)) srcp++;
 671                 memmove(destp, srcp, strlen(srcp) + 1);
 672         }
 673 }
 674
 675 gchar *strchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
 676 {
 677         gboolean in_quote = FALSE;
 678
 679         while (*str) {
 680                 if (*str == c && !in_quote)
 681                         return (gchar *)str;
 682                 if (*str == quote_chr)
 683                         in_quote ^= TRUE;
 684                 str++;
 685         }
 686
 687         return NULL;
 688 }
 689
 690 void extract_address(gchar *str)
 691 {
 692         cm_return_if_fail(str != NULL);
 693         eliminate_address_comment(str);
 694         if (strchr_with_skip_quote(str, '"', '<'))
 695                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 696         g_strstrip(str);
 697 }
 698
 699 void extract_list_id_str(gchar *str)
 700 {
 701         if (strchr_with_skip_quote(str, '"', '<'))
 702                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 703         g_strstrip(str);
 704 }
 705
 706 static GSList *address_list_append_real(GSList *addr_list, const gchar *str, gboolean removecomments)
 707 {
 708         gchar *work;
 709         gchar *workp;
 710
 711         if (!str) return addr_list;
 712
 713         Xstrdup_a(work, str, return addr_list);
 714
 715         if (removecomments)
 716                 eliminate_address_comment(work);
 717         workp = work;
 718
 719         while (workp && *workp) {
 720                 gchar *p, *next;
 721
 722                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 723                         *p = '\0';
 724                         next = p + 1;
 725                 } else
 726                         next = NULL;
 727
 728                 if (removecomments && strchr_with_skip_quote(workp, '"', '<'))
 729                         extract_parenthesis_with_skip_quote
 730                                 (workp, '"', '<', '>');
 731
 732                 g_strstrip(workp);
 733                 if (*workp)
 734                         addr_list = g_slist_append(addr_list, g_strdup(workp));
 735
 736                 workp = next;
 737         }
 738
 739         return addr_list;
 740 }
 741
 742 GSList *address_list_append(GSList *addr_list, const gchar *str)
 743 {
 744         return address_list_append_real(addr_list, str, TRUE);
 745 }
 746
 747 GSList *address_list_append_with_comments(GSList *addr_list, const gchar *str)
 748 {
 749         return address_list_append_real(addr_list, str, FALSE);
 750 }
 751
 752 GSList *references_list_prepend(GSList *msgid_list, const gchar *str)
 753 {
 754         const gchar *strp;
 755
 756         if (!str) return msgid_list;
 757         strp = str;
 758
 759         while (strp && *strp) {
 760                 const gchar *start, *end;
 761                 gchar *msgid;
 762
 763                 if ((start = strchr(strp, '<')) != NULL) {
 764                         end = strchr(start + 1, '>');
 765                         if (!end) break;
 766                 } else
 767                         break;
 768
 769                 msgid = g_strndup(start + 1, end - start - 1);
 770                 g_strstrip(msgid);
 771                 if (*msgid)
 772                         msgid_list = g_slist_prepend(msgid_list, msgid);
 773                 else
 774                         g_free(msgid);
 775
 776                 strp = end + 1;
 777         }
 778
 779         return msgid_list;
 780 }
 781
 782 GSList *references_list_append(GSList *msgid_list, const gchar *str)
 783 {
 784         GSList *list;
 785
 786         list = references_list_prepend(NULL, str);
 787         list = g_slist_reverse(list);
 788         msgid_list = g_slist_concat(msgid_list, list);
 789
 790         return msgid_list;
 791 }
 792
 793 GSList *newsgroup_list_append(GSList *group_list, const gchar *str)
 794 {
 795         gchar *work;
 796         gchar *workp;
 797
 798         if (!str) return group_list;
 799
 800         Xstrdup_a(work, str, return group_list);
 801
 802         workp = work;
 803
 804         while (workp && *workp) {
 805                 gchar *p, *next;
 806
 807                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 808                         *p = '\0';
 809                         next = p + 1;
 810                 } else
 811                         next = NULL;
 812
 813                 g_strstrip(workp);
 814                 if (*workp)
 815                         group_list = g_slist_append(group_list,
 816                                                     g_strdup(workp));
 817
 818                 workp = next;
 819         }
 820
 821         return group_list;
 822 }
 823
 824 GList *add_history(GList *list, const gchar *str)
 825 {
 826         GList *old;
 827         gchar *oldstr;
 828
 829         cm_return_val_if_fail(str != NULL, list);
 830
 831         old = g_list_find_custom(list, (gpointer)str, (GCompareFunc)g_strcmp0);
 832         if (old) {
 833                 oldstr = old->data;
 834                 list = g_list_remove(list, old->data);
 835                 g_free(oldstr);
 836         } else if (g_list_length(list) >= MAX_HISTORY_SIZE) {
 837                 GList *last;
 838
 839                 last = g_list_last(list);
 840                 if (last) {
 841                         oldstr = last->data;
 842                         list = g_list_remove(list, last->data);
 843                         g_free(oldstr);
 844                 }
 845         }
 846
 847         list = g_list_prepend(list, g_strdup(str));
 848
 849         return list;
 850 }
 851
 852 void remove_return(gchar *str)
 853 {
 854         register gchar *p = str;
 855
 856         while (*p) {
 857                 if (*p == '\n' || *p == '\r')
 858                         memmove(p, p + 1, strlen(p));
 859                 else
 860                         p++;
 861         }
 862 }
 863
 864 void remove_space(gchar *str)
 865 {
 866         register gchar *p = str;
 867         register gint spc;
 868
 869         while (*p) {
 870                 spc = 0;
 871                 while (g_ascii_isspace(*(p + spc)))
 872                         spc++;
 873                 if (spc)
 874                         memmove(p, p + spc, strlen(p + spc) + 1);
 875                 else
 876                         p++;
 877         }
 878 }
 879
 880 void unfold_line(gchar *str)
 881 {
 882         register gchar *ch;
 883         register gunichar c;
 884         register gint len;
 885
 886         ch = str; /* iterator for source string */
 887
 888         while (*ch != 0) {
 889                 c = g_utf8_get_char_validated(ch, -1);
 890
 891                 if (c == (gunichar)-1 || c == (gunichar)-2) {
 892                         /* non-unicode byte, move past it */
 893                         ch++;
 894                         continue;
 895                 }
 896
 897                 len = g_unichar_to_utf8(c, NULL);
 898
 899                 if ((!g_unichar_isdefined(c) || !g_unichar_isprint(c) ||
 900                                 g_unichar_isspace(c)) && c != 173) {
 901                         /* replace anything bad or whitespacey with a single space */
 902                         *ch = ' ';
 903                         ch++;
 904                         if (len > 1) {
 905                                 /* move rest of the string forwards, since we just replaced
 906                                  * a multi-byte sequence with one byte */
 907                                 memmove(ch, ch + len-1, strlen(ch + len-1) + 1);
 908                         }
 909                 } else {
 910                         /* A valid unicode character, copy it. */
 911                         ch += len;
 912                 }
 913         }
 914 }
 915
 916 void subst_char(gchar *str, gchar orig, gchar subst)
 917 {
 918         register gchar *p = str;
 919
 920         while (*p) {
 921                 if (*p == orig)
 922                         *p = subst;
 923                 p++;
 924         }
 925 }
 926
 927 void subst_chars(gchar *str, gchar *orig, gchar subst)
 928 {
 929         register gchar *p = str;
 930
 931         while (*p) {
 932                 if (strchr(orig, *p) != NULL)
 933                         *p = subst;
 934                 p++;
 935         }
 936 }
 937
 938 void subst_for_filename(gchar *str)
 939 {
 940         if (!str)
 941                 return;
 942 #ifdef G_OS_WIN32
 943         subst_chars(str, "\t\r\n\\/*?:", '_');
 944 #else
 945         subst_chars(str, "\t\r\n\\/*", '_');
 946 #endif
 947 }
 948
 949 void subst_for_shellsafe_filename(gchar *str)
 950 {
 951         if (!str)
 952                 return;
 953         subst_for_filename(str);
 954         subst_chars(str, " \"'|&;()<>'!{}[]",'_');
 955 }
 956
 957 gboolean is_ascii_str(const gchar *str)
 958 {
 959         const guchar *p = (const guchar *)str;
 960
 961         while (*p != '\0') {
 962                 if (*p != '\t' && *p != ' ' &&
 963                     *p != '\r' && *p != '\n' &&
 964                     (*p < 32 || *p >= 127))
 965                         return FALSE;
 966                 p++;
 967         }
 968
 969         return TRUE;
 970 }
 971
 972 static const gchar * line_has_quote_char_last(const gchar * str, const gchar *quote_chars)
 973 {
 974         gchar * position = NULL;
 975         gchar * tmp_pos = NULL;
 976         int i;
 977
 978         if (str == NULL || quote_chars == NULL)
 979                 return NULL;
 980
 981         for (i = 0; i < strlen(quote_chars); i++) {
 982                 tmp_pos = strrchr (str, quote_chars[i]);
 983                 if(position == NULL
 984                                 || (tmp_pos != NULL && position <= tmp_pos) )
 985                         position = tmp_pos;
 986         }
 987         return position;
 988 }
 989
 990 gint get_quote_level(const gchar *str, const gchar *quote_chars)
 991 {
 992         const gchar *first_pos;
 993         const gchar *last_pos;
 994         const gchar *p = str;
 995         gint quote_level = -1;
 996
 997         /* speed up line processing by only searching to the last '>' */
 998         if ((first_pos = line_has_quote_char(str, quote_chars)) != NULL) {
 999                 /* skip a line if it contains a '<' before the initial '>' */
1000                 if (memchr(str, '<', first_pos - str) != NULL)
1001                         return -1;
1002                 last_pos = line_has_quote_char_last(first_pos, quote_chars);
1003         } else
1004                 return -1;
1005
1006         while (p <= last_pos) {
1007                 while (p < last_pos) {
1008                         if (g_ascii_isspace(*p))
1009                                 p++;
1010                         else
1011                                 break;
1012                 }
1013
1014                 if (strchr(quote_chars, *p))
1015                         quote_level++;
1016                 else if (*p != '-' && !g_ascii_isspace(*p) && p <= last_pos) {
1017                         /* any characters are allowed except '-','<' and space */
1018                         while (*p != '-' && *p != '<'
1019                                && !strchr(quote_chars, *p)
1020                                && !g_ascii_isspace(*p)
1021                                && p < last_pos)
1022                                 p++;
1023                         if (strchr(quote_chars, *p))
1024                                 quote_level++;
1025                         else
1026                                 break;
1027                 }
1028
1029                 p++;
1030         }
1031
1032         return quote_level;
1033 }
1034
1035 gint check_line_length(const gchar *str, gint max_chars, gint *line)
1036 {
1037         const gchar *p = str, *q;
1038         gint cur_line = 0, len;
1039
1040         while ((q = strchr(p, '\n')) != NULL) {
1041                 len = q - p + 1;
1042                 if (len > max_chars) {
1043                         if (line)
1044                                 *line = cur_line;
1045                         return -1;
1046                 }
1047                 p = q + 1;
1048                 ++cur_line;
1049         }
1050
1051         len = strlen(p);
1052         if (len > max_chars) {
1053                 if (line)
1054                         *line = cur_line;
1055                 return -1;
1056         }
1057
1058         return 0;
1059 }
1060
1061 const gchar * line_has_quote_char(const gchar * str, const gchar *quote_chars)
1062 {
1063         gchar * position = NULL;
1064         gchar * tmp_pos = NULL;
1065         int i;
1066
1067         if (str == NULL || quote_chars == NULL)
1068                 return NULL;
1069
1070         for (i = 0; i < strlen(quote_chars); i++) {
1071                 tmp_pos = strchr (str, quote_chars[i]);
1072                 if(position == NULL
1073                                 || (tmp_pos != NULL && position >= tmp_pos) )
1074                         position = tmp_pos;
1075         }
1076         return position;
1077 }
1078
1079 static gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
1080 {
1081         register guint haystack_len, needle_len;
1082         gboolean in_squote = FALSE, in_dquote = FALSE;
1083
1084         haystack_len = strlen(haystack);
1085         needle_len   = strlen(needle);
1086
1087         if (haystack_len < needle_len || needle_len == 0)
1088                 return NULL;
1089
1090         while (haystack_len >= needle_len) {
1091                 if (!in_squote && !in_dquote &&
1092                     !strncmp(haystack, needle, needle_len))
1093                         return (gchar *)haystack;
1094
1095                 /* 'foo"bar"' -> foo"bar"
1096                    "foo'bar'" -> foo'bar' */
1097                 if (*haystack == '\'') {
1098                         if (in_squote)
1099                                 in_squote = FALSE;
1100                         else if (!in_dquote)
1101                                 in_squote = TRUE;
1102                 } else if (*haystack == '\"') {
1103                         if (in_dquote)
1104                                 in_dquote = FALSE;
1105                         else if (!in_squote)
1106                                 in_dquote = TRUE;
1107                 } else if (*haystack == '\\') {
1108                         haystack++;
1109                         haystack_len--;
1110                 }
1111
1112                 haystack++;
1113                 haystack_len--;
1114         }
1115
1116         return NULL;
1117 }
1118
1119 gchar **strsplit_with_quote(const gchar *str, const gchar *delim,
1120                             gint max_tokens)
1121 {
1122         GSList *string_list = NULL, *slist;
1123         gchar **str_array, *s, *new_str;
1124         guint i, n = 1, len;
1125
1126         cm_return_val_if_fail(str != NULL, NULL);
1127         cm_return_val_if_fail(delim != NULL, NULL);
1128
1129         if (max_tokens < 1)
1130                 max_tokens = G_MAXINT;
1131
1132         s = strstr_with_skip_quote(str, delim);
1133         if (s) {
1134                 guint delimiter_len = strlen(delim);
1135
1136                 do {
1137                         len = s - str;
1138                         new_str = g_strndup(str, len);
1139
1140                         if (new_str[0] == '\'' || new_str[0] == '\"') {
1141                                 if (new_str[len - 1] == new_str[0]) {
1142                                         new_str[len - 1] = '\0';
1143                                         memmove(new_str, new_str + 1, len - 1);
1144                                 }
1145                         }
1146                         string_list = g_slist_prepend(string_list, new_str);
1147                         n++;
1148                         str = s + delimiter_len;
1149                         s = strstr_with_skip_quote(str, delim);
1150                 } while (--max_tokens && s);
1151         }
1152
1153         if (*str) {
1154                 new_str = g_strdup(str);
1155                 if (new_str[0] == '\'' || new_str[0] == '\"') {
1156                         len = strlen(str);
1157                         if (new_str[len - 1] == new_str[0]) {
1158                                 new_str[len - 1] = '\0';
1159                                 memmove(new_str, new_str + 1, len - 1);
1160                         }
1161                 }
1162                 string_list = g_slist_prepend(string_list, new_str);
1163                 n++;
1164         }
1165
1166         str_array = g_new(gchar*, n);
1167
1168         i = n - 1;
1169
1170         str_array[i--] = NULL;
1171         for (slist = string_list; slist; slist = slist->next)
1172                 str_array[i--] = slist->data;
1173
1174         g_slist_free(string_list);
1175
1176         return str_array;
1177 }
1178
1179 gchar *get_abbrev_newsgroup_name(const gchar *group, gint len)
1180 {
1181         gchar *abbrev_group;
1182         gchar *ap;
1183         const gchar *p = group;
1184         const gchar *last;
1185
1186         cm_return_val_if_fail(group != NULL, NULL);
1187
1188         last = group + strlen(group);
1189         abbrev_group = ap = g_malloc(strlen(group) + 1);
1190
1191         while (*p) {
1192                 while (*p == '.')
1193                         *ap++ = *p++;
1194                 if ((ap - abbrev_group) + (last - p) > len && strchr(p, '.')) {
1195                         *ap++ = *p++;
1196                         while (*p != '.') p++;
1197                 } else {
1198                         strcpy(ap, p);
1199                         return abbrev_group;
1200                 }
1201         }
1202
1203         *ap = '\0';
1204         return abbrev_group;
1205 }
1206
1207 gchar *trim_string(const gchar *str, gint len)
1208 {
1209         const gchar *p = str;
1210         gint mb_len;
1211         gchar *new_str;
1212         gint new_len = 0;
1213
1214         if (!str) return NULL;
1215         if (strlen(str) <= len)
1216                 return g_strdup(str);
1217         if (g_utf8_validate(str, -1, NULL) == FALSE)
1218                 return g_strdup(str);
1219
1220         while (*p != '\0') {
1221                 mb_len = g_utf8_skip[*(guchar *)p];
1222                 if (mb_len == 0)
1223                         break;
1224                 else if (new_len + mb_len > len)
1225                         break;
1226
1227                 new_len += mb_len;
1228                 p += mb_len;
1229         }
1230
1231         Xstrndup_a(new_str, str, new_len, return g_strdup(str));
1232         return g_strconcat(new_str, "...", NULL);
1233 }
1234
1235 GList *uri_list_extract_filenames(const gchar *uri_list)
1236 {
1237         GList *result = NULL;
1238         const gchar *p, *q;
1239         gchar *escaped_utf8uri;
1240
1241         p = uri_list;
1242
1243         while (p) {
1244                 if (*p != '#') {
1245                         while (g_ascii_isspace(*p)) p++;
1246                         if (!strncmp(p, "file:", 5)) {
1247                                 q = p;
1248                                 q += 5;
1249                                 while (*q && *q != '\n' && *q != '\r') q++;
1250
1251                                 if (q > p) {
1252                                         gchar *file, *locale_file = NULL;
1253                                         q--;
1254                                         while (q > p && g_ascii_isspace(*q))
1255                                                 q--;
1256                                         Xalloca(escaped_utf8uri, q - p + 2,
1257                                                 return result);
1258                                         Xalloca(file, q - p + 2,
1259                                                 return result);
1260                                         *file = '\0';
1261                                         strncpy(escaped_utf8uri, p, q - p + 1);
1262                                         escaped_utf8uri[q - p + 1] = '\0';
1263                                         decode_uri_with_plus(file, escaped_utf8uri, FALSE);
1264                     /*
1265                      * g_filename_from_uri() rejects escaped/locale encoded uri
1266                      * string which come from Nautilus.
1267                      */
1268 #ifndef G_OS_WIN32
1269                                         if (g_utf8_validate(file, -1, NULL))
1270                                                 locale_file
1271                                                         = conv_codeset_strdup(
1272                                                                 file + 5,
1273                                                                 CS_UTF_8,
1274                                                                 conv_get_locale_charset_str());
1275                                         if (!locale_file)
1276                                                 locale_file = g_strdup(file + 5);
1277 #else
1278                                         locale_file = g_filename_from_uri(escaped_utf8uri, NULL, NULL);
1279 #endif
1280                                         result = g_list_append(result, locale_file);
1281                                 }
1282                         }
1283                 }
1284                 p = strchr(p, '\n');
1285                 if (p) p++;
1286         }
1287
1288         return result;
1289 }
1290
1291 /* Converts two-digit hexadecimal to decimal.  Used for unescaping escaped
1292  * characters
1293  */
1294 static gint axtoi(const gchar *hexstr)
1295 {
1296         gint hi, lo, result;
1297
1298         hi = hexstr[0];
1299         if ('0' <= hi && hi <= '9') {
1300                 hi -= '0';
1301         } else
1302                 if ('a' <= hi && hi <= 'f') {
1303                         hi -= ('a' - 10);
1304                 } else
1305                         if ('A' <= hi && hi <= 'F') {
1306                                 hi -= ('A' - 10);
1307                         }
1308
1309         lo = hexstr[1];
1310         if ('0' <= lo && lo <= '9') {
1311                 lo -= '0';
1312         } else
1313                 if ('a' <= lo && lo <= 'f') {
1314                         lo -= ('a'-10);
1315                 } else
1316                         if ('A' <= lo && lo <= 'F') {
1317                                 lo -= ('A' - 10);
1318                         }
1319         result = lo + (16 * hi);
1320         return result;
1321 }
1322
1323 gboolean is_uri_string(const gchar *str)
1324 {
1325         while (str && *str && g_ascii_isspace(*str))
1326                 str++;
1327         return (g_ascii_strncasecmp(str, "http://", 7) == 0 ||
1328                 g_ascii_strncasecmp(str, "https://", 8) == 0 ||
1329                 g_ascii_strncasecmp(str, "ftp://", 6) == 0 ||
1330                 g_ascii_strncasecmp(str, "www.", 4) == 0);
1331 }
1332
1333 gchar *get_uri_path(const gchar *uri)
1334 {
1335         while (uri && *uri && g_ascii_isspace(*uri))
1336                 uri++;
1337         if (g_ascii_strncasecmp(uri, "http://", 7) == 0)
1338                 return (gchar *)(uri + 7);
1339         else if (g_ascii_strncasecmp(uri, "https://", 8) == 0)
1340                 return (gchar *)(uri + 8);
1341         else if (g_ascii_strncasecmp(uri, "ftp://", 6) == 0)
1342                 return (gchar *)(uri + 6);
1343         else
1344                 return (gchar *)uri;
1345 }
1346
1347 gint get_uri_len(const gchar *str)
1348 {
1349         const gchar *p;
1350
1351         if (is_uri_string(str)) {
1352                 for (p = str; *p != '\0'; p++) {
1353                         if (!g_ascii_isgraph(*p) || strchr("()<>\"", *p))
1354                                 break;
1355                 }
1356                 return p - str;
1357         }
1358
1359         return 0;
1360 }
1361
1362 /* Decodes URL-Encoded strings (i.e. strings in which spaces are replaced by
1363  * plusses, and escape characters are used)
1364  */
1365 void decode_uri_with_plus(gchar *decoded_uri, const gchar *encoded_uri, gboolean with_plus)
1366 {
1367         gchar *dec = decoded_uri;
1368         const gchar *enc = encoded_uri;
1369
1370         while (*enc) {
1371                 if (*enc == '%') {
1372                         enc++;
1373                         if (isxdigit((guchar)enc[0]) &&
1374                             isxdigit((guchar)enc[1])) {
1375                                 *dec = axtoi(enc);
1376                                 dec++;
1377                                 enc += 2;
1378                         }
1379                 } else {
1380                         if (with_plus && *enc == '+')
1381                                 *dec = ' ';
1382                         else
1383                                 *dec = *enc;
1384                         dec++;
1385                         enc++;
1386                 }
1387         }
1388
1389         *dec = '\0';
1390 }
1391
1392 void decode_uri(gchar *decoded_uri, const gchar *encoded_uri)
1393 {
1394         decode_uri_with_plus(decoded_uri, encoded_uri, TRUE);
1395 }
1396
1397 static gchar *decode_uri_gdup(const gchar *encoded_uri)
1398 {
1399     gchar *buffer = g_malloc(strlen(encoded_uri)+1);
1400     decode_uri_with_plus(buffer, encoded_uri, FALSE);
1401     return buffer;
1402 }
1403
1404 gint scan_mailto_url(const gchar *mailto, gchar **from, gchar **to, gchar **cc, gchar **bcc,
1405                      gchar **subject, gchar **body, gchar ***attach, gchar **inreplyto)
1406 {
1407         gchar *tmp_mailto;
1408         gchar *p;
1409         const gchar *forbidden_uris[] = { ".gnupg/",
1410                                           "/etc/passwd",
1411                                           "/etc/shadow",
1412                                           ".ssh/",
1413                                           "../",
1414                                           NULL };
1415         gint num_attach = 0;
1416
1417         cm_return_val_if_fail(mailto != NULL, -1);
1418
1419         Xstrdup_a(tmp_mailto, mailto, return -1);
1420
1421         if (!strncmp(tmp_mailto, "mailto:", 7))
1422                 tmp_mailto += 7;
1423
1424         p = strchr(tmp_mailto, '?');
1425         if (p) {
1426                 *p = '\0';
1427                 p++;
1428         }
1429
1430         if (to && !*to)
1431                 *to = decode_uri_gdup(tmp_mailto);
1432
1433         while (p) {
1434                 gchar *field, *value;
1435
1436                 field = p;
1437
1438                 p = strchr(p, '=');
1439                 if (!p) break;
1440                 *p = '\0';
1441                 p++;
1442
1443                 value = p;
1444
1445                 p = strchr(p, '&');
1446                 if (p) {
1447                         *p = '\0';
1448                         p++;
1449                 }
1450
1451                 if (*value == '\0') continue;
1452
1453                 if (from && !g_ascii_strcasecmp(field, "from")) {
1454                         if (!*from) {
1455                                 *from = decode_uri_gdup(value);
1456                         } else {
1457                                 gchar *tmp = decode_uri_gdup(value);
1458                                 gchar *new_from = g_strdup_printf("%s, %s", *from, tmp);
1459                                 g_free(tmp);
1460                                 g_free(*from);
1461                                 *from = new_from;
1462                         }
1463                 } else if (cc && !g_ascii_strcasecmp(field, "cc")) {
1464                         if (!*cc) {
1465                                 *cc = decode_uri_gdup(value);
1466                         } else {
1467                                 gchar *tmp = decode_uri_gdup(value);
1468                                 gchar *new_cc = g_strdup_printf("%s, %s", *cc, tmp);
1469                                 g_free(tmp);
1470                                 g_free(*cc);
1471                                 *cc = new_cc;
1472                         }
1473                 } else if (bcc && !g_ascii_strcasecmp(field, "bcc")) {
1474                         if (!*bcc) {
1475                                 *bcc = decode_uri_gdup(value);
1476                         } else {
1477                                 gchar *tmp = decode_uri_gdup(value);
1478                                 gchar *new_bcc = g_strdup_printf("%s, %s", *bcc, tmp);
1479                                 g_free(tmp);
1480                                 g_free(*bcc);
1481                                 *bcc = new_bcc;
1482                         }
1483                 } else if (subject && !*subject &&
1484                            !g_ascii_strcasecmp(field, "subject")) {
1485                         *subject = decode_uri_gdup(value);
1486                 } else if (body && !*body && !g_ascii_strcasecmp(field, "body")) {
1487                         *body = decode_uri_gdup(value);
1488                 } else if (body && !*body && !g_ascii_strcasecmp(field, "insert")) {
1489                         int i = 0;
1490                         gchar *tmp = decode_uri_gdup(value);
1491
1492                         for (; forbidden_uris[i]; i++) {
1493                                 if (strstr(tmp, forbidden_uris[i])) {
1494                                         g_print("Refusing to insert '%s', potential private data leak\n",
1495                                                         tmp);
1496                                         g_free(tmp);
1497                                         tmp = NULL;
1498                                         break;
1499                                 }
1500                         }
1501
1502                         if (tmp) {
1503                                 if (!is_file_entry_regular(tmp)) {
1504                                         g_warning("Refusing to insert '%s', not a regular file\n", tmp);
1505                                 } else if (!g_file_get_contents(tmp, body, NULL, NULL)) {
1506                                         g_warning("couldn't set insert file '%s' in body", value);
1507                                 }
1508
1509                                 g_free(tmp);
1510                         }
1511                 } else if (attach && !g_ascii_strcasecmp(field, "attach")) {
1512                         int i = 0;
1513                         gchar *tmp = decode_uri_gdup(value);
1514                         gchar **my_att = g_malloc(sizeof(char *));
1515
1516                         my_att[0] = NULL;
1517
1518                         for (; forbidden_uris[i]; i++) {
1519                                 if (strstr(tmp, forbidden_uris[i])) {
1520                                         g_print("Refusing to attach '%s', potential private data leak\n",
1521                                                         tmp);
1522                                         g_free(tmp);
1523                                         g_free(my_att);
1524                                         tmp = NULL;
1525                                         break;
1526                                 }
1527                         }
1528                         if (tmp) {
1529                                 /* attach is correct */
1530                                 num_attach++;
1531                                 my_att = g_realloc(my_att, (sizeof(char *))*(num_attach+1));
1532                                 my_att[num_attach-1] = tmp;
1533                                 my_att[num_attach] = NULL;
1534                                 *attach = my_att;
1535                         }
1536                 } else if (inreplyto && !*inreplyto &&
1537                            !g_ascii_strcasecmp(field, "in-reply-to")) {
1538                         *inreplyto = decode_uri_gdup(value);
1539                 }
1540         }
1541
1542         return 0;
1543 }
1544
1545
1546 #ifdef G_OS_WIN32
1547 #include <windows.h>
1548 #ifndef CSIDL_APPDATA
1549 #define CSIDL_APPDATA 0x001a
1550 #endif
1551 #ifndef CSIDL_LOCAL_APPDATA
1552 #define CSIDL_LOCAL_APPDATA 0x001c
1553 #endif
1554 #ifndef CSIDL_FLAG_CREATE
1555 #define CSIDL_FLAG_CREATE 0x8000
1556 #endif
1557 #define DIM(v)               (sizeof(v)/sizeof((v)[0]))
1558
1559 #define RTLD_LAZY 0
1560 const char *
1561 w32_strerror (int w32_errno)
1562 {
1563   static char strerr[256];
1564   int ec = (int)GetLastError ();
1565
1566   if (w32_errno == 0)
1567     w32_errno = ec;
1568   FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, w32_errno,
1569                  MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
1570                  strerr, DIM (strerr)-1, NULL);
1571   return strerr;
1572 }
1573
1574 static __inline__ void *
1575 dlopen (const char * name, int flag)
1576 {
1577   void * hd = LoadLibrary (name);
1578   return hd;
1579 }
1580
1581 static __inline__ void *
1582 dlsym (void * hd, const char * sym)
1583 {
1584   if (hd && sym)
1585     {
1586       void * fnc = GetProcAddress (hd, sym);
1587       if (!fnc)
1588         return NULL;
1589       return fnc;
1590     }
1591   return NULL;
1592 }
1593
1594
1595 static __inline__ const char *
1596 dlerror (void)
1597 {
1598   return w32_strerror (0);
1599 }
1600
1601
1602 static __inline__ int
1603 dlclose (void * hd)
1604 {
1605   if (hd)
1606     {
1607       FreeLibrary (hd);
1608       return 0;
1609     }
1610   return -1;
1611 }
1612
1613 static HRESULT
1614 w32_shgetfolderpath (HWND a, int b, HANDLE c, DWORD d, LPSTR e)
1615 {
1616   static int initialized;
1617   static HRESULT (WINAPI * func)(HWND,int,HANDLE,DWORD,LPSTR);
1618
1619   if (!initialized)
1620     {
1621       static char *dllnames[] = { "shell32.dll", "shfolder.dll", NULL };
1622       void *handle;
1623       int i;
1624
1625       initialized = 1;
1626
1627       for (i=0, handle = NULL; !handle && dllnames[i]; i++)
1628         {
1629           handle = dlopen (dllnames[i], RTLD_LAZY);
1630           if (handle)
1631             {
1632               func = dlsym (handle, "SHGetFolderPathW");
1633               if (!func)
1634                 {
1635                   dlclose (handle);
1636                   handle = NULL;
1637                 }
1638             }
1639         }
1640     }
1641
1642   if (func)
1643     return func (a,b,c,d,e);
1644   else
1645     return -1;
1646 }
1647
1648 /* Returns a static string with the directroy from which the module
1649    has been loaded.  Returns an empty string on error. */
1650 static char *w32_get_module_dir(void)
1651 {
1652         static char *moddir;
1653
1654         if (!moddir) {
1655                 char name[MAX_PATH+10];
1656                 char *p;
1657
1658                 if ( !GetModuleFileNameA (0, name, sizeof (name)-10) )
1659                         *name = 0;
1660                 else {
1661                         p = strrchr (name, '\\');
1662                         if (p)
1663                                 *p = 0;
1664                         else
1665                                 *name = 0;
1666                 }
1667                 moddir = g_strdup (name);
1668         }
1669         return moddir;
1670 }
1671 #endif /* G_OS_WIN32 */
1672
1673 /* Return a static string with the locale dir. */
1674 const gchar *get_locale_dir(void)
1675 {
1676         static gchar *loc_dir;
1677
1678 #ifdef G_OS_WIN32
1679         if (!loc_dir)
1680                 loc_dir = g_strconcat(w32_get_module_dir(), G_DIR_SEPARATOR_S,
1681                                       "\\share\\locale", NULL);
1682 #endif
1683         if (!loc_dir)
1684                 loc_dir = LOCALEDIR;
1685
1686         return loc_dir;
1687 }
1688
1689
1690 const gchar *get_home_dir(void)
1691 {
1692 #ifdef G_OS_WIN32
1693         static char home_dir_utf16[MAX_PATH] = "";
1694         static gchar *home_dir_utf8 = NULL;
1695         if (home_dir_utf16[0] == '\0') {
1696                 if (w32_shgetfolderpath
1697                             (NULL, CSIDL_APPDATA|CSIDL_FLAG_CREATE,
1698                              NULL, 0, home_dir_utf16) < 0)
1699                                 strcpy (home_dir_utf16, "C:\\Claws Mail");
1700                 home_dir_utf8 = g_utf16_to_utf8 ((const gunichar2 *)home_dir_utf16, -1, NULL, NULL, NULL);
1701         }
1702         return home_dir_utf8;
1703 #else
1704         static const gchar *homeenv = NULL;
1705
1706         if (homeenv)
1707                 return homeenv;
1708
1709         if (!homeenv && g_getenv("HOME") != NULL)
1710                 homeenv = g_strdup(g_getenv("HOME"));
1711         if (!homeenv)
1712                 homeenv = g_get_home_dir();
1713
1714         return homeenv;
1715 #endif
1716 }
1717
1718 static gchar *claws_rc_dir = NULL;
1719 static gboolean rc_dir_alt = FALSE;
1720 const gchar *get_rc_dir(void)
1721 {
1722
1723         if (!claws_rc_dir) {
1724                 claws_rc_dir = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1725                                      RC_DIR, NULL);
1726                 debug_print("using default rc_dir %s\n", claws_rc_dir);
1727         }
1728         return claws_rc_dir;
1729 }
1730
1731 void set_rc_dir(const gchar *dir)
1732 {
1733         gchar *canonical_dir;
1734         if (claws_rc_dir != NULL) {
1735                 g_print("Error: rc_dir already set\n");
1736         } else {
1737                 int err = cm_canonicalize_filename(dir, &canonical_dir);
1738                 int len;
1739
1740                 if (err) {
1741                         g_print("Error looking for %s: %d(%s)\n",
1742                                 dir, -err, g_strerror(-err));
1743                         exit(0);
1744                 }
1745                 rc_dir_alt = TRUE;
1746
1747                 claws_rc_dir = canonical_dir;
1748
1749                 len = strlen(claws_rc_dir);
1750                 if (claws_rc_dir[len - 1] == G_DIR_SEPARATOR)
1751                         claws_rc_dir[len - 1] = '\0';
1752
1753                 debug_print("set rc_dir to %s\n", claws_rc_dir);
1754                 if (!is_dir_exist(claws_rc_dir)) {
1755                         if (make_dir_hier(claws_rc_dir) != 0) {
1756                                 g_print("Error: can't create %s\n",
1757                                 claws_rc_dir);
1758                                 exit(0);
1759                         }
1760                 }
1761         }
1762 }
1763
1764 gboolean rc_dir_is_alt(void) {
1765         return rc_dir_alt;
1766 }
1767
1768 const gchar *get_mail_base_dir(void)
1769 {
1770         return get_home_dir();
1771 }
1772
1773 const gchar *get_news_cache_dir(void)
1774 {
1775         static gchar *news_cache_dir = NULL;
1776         if (!news_cache_dir)
1777                 news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1778                                              NEWS_CACHE_DIR, NULL);
1779
1780         return news_cache_dir;
1781 }
1782
1783 const gchar *get_imap_cache_dir(void)
1784 {
1785         static gchar *imap_cache_dir = NULL;
1786
1787         if (!imap_cache_dir)
1788                 imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1789                                              IMAP_CACHE_DIR, NULL);
1790
1791         return imap_cache_dir;
1792 }
1793
1794 const gchar *get_mime_tmp_dir(void)
1795 {
1796         static gchar *mime_tmp_dir = NULL;
1797
1798         if (!mime_tmp_dir)
1799                 mime_tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1800                                            MIME_TMP_DIR, NULL);
1801
1802         return mime_tmp_dir;
1803 }
1804
1805 const gchar *get_template_dir(void)
1806 {
1807         static gchar *template_dir = NULL;
1808
1809         if (!template_dir)
1810                 template_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1811                                            TEMPLATE_DIR, NULL);
1812
1813         return template_dir;
1814 }
1815
1816 #ifdef G_OS_WIN32
1817 const gchar *w32_get_cert_file(void)
1818 {
1819         const gchar *cert_file = NULL;
1820         if (!cert_file)
1821                 cert_file = g_strconcat(w32_get_module_dir(),
1822                                  "\\share\\claws-mail\\",
1823                                 "ca-certificates.crt",
1824                                 NULL);
1825         return cert_file;
1826 }
1827 #endif
1828
1829 /* Return the filepath of the claws-mail.desktop file */
1830 const gchar *get_desktop_file(void)
1831 {
1832 #ifdef DESKTOPFILEPATH
1833   return DESKTOPFILEPATH;
1834 #else
1835   return NULL;
1836 #endif
1837 }
1838
1839 /* Return the default directory for Plugins. */
1840 const gchar *get_plugin_dir(void)
1841 {
1842 #ifdef G_OS_WIN32
1843         static gchar *plugin_dir = NULL;
1844
1845         if (!plugin_dir)
1846                 plugin_dir = g_strconcat(w32_get_module_dir(),
1847                                          "\\lib\\claws-mail\\plugins\\",
1848                                          NULL);
1849         return plugin_dir;
1850 #else
1851         if (is_dir_exist(PLUGINDIR))
1852                 return PLUGINDIR;
1853         else {
1854                 static gchar *plugin_dir = NULL;
1855                 if (!plugin_dir)
1856                         plugin_dir = g_strconcat(get_rc_dir(),
1857                                 G_DIR_SEPARATOR_S, "plugins",
1858                                 G_DIR_SEPARATOR_S, NULL);
1859                 return plugin_dir;
1860         }
1861 #endif
1862 }
1863
1864
1865 #ifdef G_OS_WIN32
1866 /* Return the default directory for Themes. */
1867 const gchar *w32_get_themes_dir(void)
1868 {
1869         static gchar *themes_dir = NULL;
1870
1871         if (!themes_dir)
1872                 themes_dir = g_strconcat(w32_get_module_dir(),
1873                                          "\\share\\claws-mail\\themes",
1874                                          NULL);
1875         return themes_dir;
1876 }
1877 #endif
1878
1879 const gchar *get_tmp_dir(void)
1880 {
1881         static gchar *tmp_dir = NULL;
1882
1883         if (!tmp_dir)
1884                 tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1885                                       TMP_DIR, NULL);
1886
1887         return tmp_dir;
1888 }
1889
1890 gchar *get_tmp_file(void)
1891 {
1892         gchar *tmp_file;
1893         static guint32 id = 0;
1894
1895         tmp_file = g_strdup_printf("%s%ctmpfile.%08x",
1896                                    get_tmp_dir(), G_DIR_SEPARATOR, id++);
1897
1898         return tmp_file;
1899 }
1900
1901 const gchar *get_domain_name(void)
1902 {
1903 #ifdef G_OS_UNIX
1904         static gchar *domain_name = NULL;
1905         struct addrinfo hints, *res;
1906         char hostname[256];
1907         int s;
1908
1909         if (!domain_name) {
1910                 if (gethostname(hostname, sizeof(hostname)) != 0) {
1911                         perror("gethostname");
1912                         domain_name = "localhost";
1913                 } else {
1914                         memset(&hints, 0, sizeof(struct addrinfo));
1915                         hints.ai_family = AF_UNSPEC;
1916                         hints.ai_socktype = 0;
1917                         hints.ai_flags = AI_CANONNAME;
1918                         hints.ai_protocol = 0;
1919
1920                         s = getaddrinfo(hostname, NULL, &hints, &res);
1921                         if (s != 0) {
1922                                 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
1923                                 domain_name = g_strdup(hostname);
1924                         } else {
1925                                 domain_name = g_strdup(res->ai_canonname);
1926                                 freeaddrinfo(res);
1927                         }
1928                 }
1929                 debug_print("domain name = %s\n", domain_name);
1930         }
1931
1932         return domain_name;
1933 #else
1934         return "localhost";
1935 #endif
1936 }
1937
1938 /* Tells whether the given host address string is a valid representation of a
1939  * numerical IP (v4 or, if supported, v6) address.
1940  */
1941 gboolean is_numeric_host_address(const gchar *hostaddress)
1942 {
1943         struct addrinfo hints, *res;
1944         int err;
1945
1946         /* See what getaddrinfo makes of the string when told that it is a
1947          * numeric IP address representation. */
1948         memset(&hints, 0, sizeof(struct addrinfo));
1949         hints.ai_family = AF_UNSPEC;
1950         hints.ai_socktype = 0;
1951         hints.ai_flags = AI_NUMERICHOST;
1952         hints.ai_protocol = 0;
1953
1954         err = getaddrinfo(hostaddress, NULL, &hints, &res);
1955         if (err == 0)
1956                 freeaddrinfo(res);
1957
1958         return (err == 0);
1959 }
1960
1961 off_t get_file_size(const gchar *file)
1962 {
1963 #ifdef G_OS_WIN32
1964         GFile *f;
1965         GFileInfo *fi;
1966         GError *error = NULL;
1967         goffset size;
1968
1969         f = g_file_new_for_path(file);
1970         fi = g_file_query_info(f, "standard::size",
1971                         G_FILE_QUERY_INFO_NONE, NULL, &error);
1972         if (error != NULL) {
1973                 debug_print("get_file_size error: %s\n", error->message);
1974                 g_error_free(error);
1975                 g_object_unref(f);
1976                 return -1;
1977         }
1978         size = g_file_info_get_size(fi);
1979         g_object_unref(fi);
1980         g_object_unref(f);
1981         return size;
1982
1983 #else
1984         GStatBuf s;
1985
1986         if (g_stat(file, &s) < 0) {
1987                 FILE_OP_ERROR(file, "stat");
1988                 return -1;
1989         }
1990
1991         return s.st_size;
1992 #endif
1993 }
1994
1995 time_t get_file_mtime(const gchar *file)
1996 {
1997         GStatBuf s;
1998
1999         if (g_stat(file, &s) < 0) {
2000                 FILE_OP_ERROR(file, "stat");
2001                 return -1;
2002         }
2003
2004         return s.st_mtime;
2005 }
2006
2007 gboolean file_exist(const gchar *file, gboolean allow_fifo)
2008 {
2009         GStatBuf s;
2010
2011         if (file == NULL)
2012                 return FALSE;
2013
2014         if (g_stat(file, &s) < 0) {
2015                 if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
2016                 return FALSE;
2017         }
2018
2019         if (S_ISREG(s.st_mode) || (allow_fifo && S_ISFIFO(s.st_mode)))
2020                 return TRUE;
2021
2022         return FALSE;
2023 }
2024
2025
2026 /* Test on whether FILE is a relative file name. This is
2027  * straightforward for Unix but more complex for Windows. */
2028 gboolean is_relative_filename(const gchar *file)
2029 {
2030         if (!file)
2031                 return TRUE;
2032 #ifdef G_OS_WIN32
2033         if ( *file == '\\' && file[1] == '\\' && strchr (file+2, '\\') )
2034                 return FALSE; /* Prefixed with a hostname - this can't
2035                                * be a relative name. */
2036
2037         if ( ((*file >= 'a' && *file <= 'z')
2038               || (*file >= 'A' && *file <= 'Z'))
2039              && file[1] == ':')
2040                 file += 2;  /* Skip drive letter. */
2041
2042         return !(*file == '\\' || *file == '/');
2043 #else
2044         return !(*file == G_DIR_SEPARATOR);
2045 #endif
2046 }
2047
2048
2049 gboolean is_dir_exist(const gchar *dir)
2050 {
2051         if (dir == NULL)
2052                 return FALSE;
2053
2054         return g_file_test(dir, G_FILE_TEST_IS_DIR);
2055 }
2056
2057 gboolean is_file_entry_exist(const gchar *file)
2058 {
2059         if (file == NULL)
2060                 return FALSE;
2061
2062         return g_file_test(file, G_FILE_TEST_EXISTS);
2063 }
2064
2065 gboolean is_file_entry_regular(const gchar *file)
2066 {
2067         if (file == NULL)
2068                 return FALSE;
2069
2070         return g_file_test(file, G_FILE_TEST_IS_REGULAR);
2071 }
2072
2073 gboolean dirent_is_regular_file(struct dirent *d)
2074 {
2075 #if !defined(G_OS_WIN32) && defined(HAVE_DIRENT_D_TYPE)
2076         if (d->d_type == DT_REG)
2077                 return TRUE;
2078         else if (d->d_type != DT_UNKNOWN)
2079                 return FALSE;
2080 #endif
2081
2082         return g_file_test(d->d_name, G_FILE_TEST_IS_REGULAR);
2083 }
2084
2085 gint change_dir(const gchar *dir)
2086 {
2087         gchar *prevdir = NULL;
2088
2089         if (debug_mode)
2090                 prevdir = g_get_current_dir();
2091
2092         if (g_chdir(dir) < 0) {
2093                 FILE_OP_ERROR(dir, "chdir");
2094                 if (debug_mode) g_free(prevdir);
2095                 return -1;
2096         } else if (debug_mode) {
2097                 gchar *cwd;
2098
2099                 cwd = g_get_current_dir();
2100                 if (strcmp(prevdir, cwd) != 0)
2101                         g_print("current dir: %s\n", cwd);
2102                 g_free(cwd);
2103                 g_free(prevdir);
2104         }
2105
2106         return 0;
2107 }
2108
2109 gint make_dir(const gchar *dir)
2110 {
2111         if (g_mkdir(dir, S_IRWXU) < 0) {
2112                 FILE_OP_ERROR(dir, "mkdir");
2113                 return -1;
2114         }
2115         if (g_chmod(dir, S_IRWXU) < 0)
2116                 FILE_OP_ERROR(dir, "chmod");
2117
2118         return 0;
2119 }
2120
2121 gint make_dir_hier(const gchar *dir)
2122 {
2123         gchar *parent_dir;
2124         const gchar *p;
2125
2126         for (p = dir; (p = strchr(p, G_DIR_SEPARATOR)) != NULL; p++) {
2127                 parent_dir = g_strndup(dir, p - dir);
2128                 if (*parent_dir != '\0') {
2129                         if (!is_dir_exist(parent_dir)) {
2130                                 if (make_dir(parent_dir) < 0) {
2131                                         g_free(parent_dir);
2132                                         return -1;
2133                                 }
2134                         }
2135                 }
2136                 g_free(parent_dir);
2137         }
2138
2139         if (!is_dir_exist(dir)) {
2140                 if (make_dir(dir) < 0)
2141                         return -1;
2142         }
2143
2144         return 0;
2145 }
2146
2147 gint remove_all_files(const gchar *dir)
2148 {
2149         GDir *dp;
2150         const gchar *file_name;
2151         gchar *tmp;
2152
2153         if ((dp = g_dir_open(dir, 0, NULL)) == NULL) {
2154                 g_warning("failed to open directory: %s", dir);
2155                 return -1;
2156         }
2157
2158         while ((file_name = g_dir_read_name(dp)) != NULL) {
2159                 tmp = g_strconcat(dir, G_DIR_SEPARATOR_S, file_name, NULL);
2160                 if (claws_unlink(tmp) < 0)
2161                         FILE_OP_ERROR(tmp, "unlink");
2162                 g_free(tmp);
2163         }
2164
2165         g_dir_close(dp);
2166
2167         return 0;
2168 }
2169
2170 gint remove_numbered_files(const gchar *dir, guint first, guint last)
2171 {
2172         GDir *dp;
2173         const gchar *dir_name;
2174         gchar *prev_dir;
2175         gint file_no;
2176
2177         if (first == last) {
2178                 /* Skip all the dir reading part. */
2179                 gchar *filename = g_strdup_printf("%s%s%u", dir, G_DIR_SEPARATOR_S, first);
2180                 if (is_dir_exist(filename)) {
2181                         /* a numbered directory with this name exists,
2182                          * remove the dot-file instead */
2183                         g_free(filename);
2184                         filename = g_strdup_printf("%s%s.%u", dir, G_DIR_SEPARATOR_S, first);
2185                 }
2186                 if (claws_unlink(filename) < 0) {
2187                         FILE_OP_ERROR(filename, "unlink");
2188                         g_free(filename);
2189                         return -1;
2190                 }
2191                 g_free(filename);
2192                 return 0;
2193         }
2194
2195         prev_dir = g_get_current_dir();
2196
2197         if (g_chdir(dir) < 0) {
2198                 FILE_OP_ERROR(dir, "chdir");
2199                 g_free(prev_dir);
2200                 return -1;
2201         }
2202
2203         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2204                 g_warning("failed to open directory: %s", dir);
2205                 g_free(prev_dir);
2206                 return -1;
2207         }
2208
2209         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2210                 file_no = to_number(dir_name);
2211                 if (file_no > 0 && first <= file_no && file_no <= last) {
2212                         if (is_dir_exist(dir_name)) {
2213                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2214                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2215                                         FILE_OP_ERROR(dot_file, "unlink");
2216                                 }
2217                                 g_free(dot_file);
2218                                 continue;
2219                         }
2220                         if (claws_unlink(dir_name) < 0)
2221                                 FILE_OP_ERROR(dir_name, "unlink");
2222                 }
2223         }
2224
2225         g_dir_close(dp);
2226
2227         if (g_chdir(prev_dir) < 0) {
2228                 FILE_OP_ERROR(prev_dir, "chdir");
2229                 g_free(prev_dir);
2230                 return -1;
2231         }
2232
2233         g_free(prev_dir);
2234
2235         return 0;
2236 }
2237
2238 gint remove_numbered_files_not_in_list(const gchar *dir, GSList *numberlist)
2239 {
2240         GDir *dp;
2241         const gchar *dir_name;
2242         gchar *prev_dir;
2243         gint file_no;
2244         GHashTable *wanted_files;
2245         GSList *cur;
2246         GError *error = NULL;
2247
2248         if (numberlist == NULL)
2249             return 0;
2250
2251         prev_dir = g_get_current_dir();
2252
2253         if (g_chdir(dir) < 0) {
2254                 FILE_OP_ERROR(dir, "chdir");
2255                 g_free(prev_dir);
2256                 return -1;
2257         }
2258
2259         if ((dp = g_dir_open(".", 0, &error)) == NULL) {
2260                 g_message("Couldn't open current directory: %s (%d).\n",
2261                                 error->message, error->code);
2262                 g_error_free(error);
2263                 g_free(prev_dir);
2264                 return -1;
2265         }
2266
2267         wanted_files = g_hash_table_new(g_direct_hash, g_direct_equal);
2268         for (cur = numberlist; cur != NULL; cur = cur->next) {
2269                 /* numberlist->data is expected to be GINT_TO_POINTER */
2270                 g_hash_table_insert(wanted_files, cur->data, GINT_TO_POINTER(1));
2271         }
2272
2273         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2274                 file_no = to_number(dir_name);
2275                 if (is_dir_exist(dir_name))
2276                         continue;
2277                 if (file_no > 0 && g_hash_table_lookup(wanted_files, GINT_TO_POINTER(file_no)) == NULL) {
2278                         debug_print("removing unwanted file %d from %s\n", file_no, dir);
2279                         if (is_dir_exist(dir_name)) {
2280                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2281                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2282                                         FILE_OP_ERROR(dot_file, "unlink");
2283                                 }
2284                                 g_free(dot_file);
2285                                 continue;
2286                         }
2287                         if (claws_unlink(dir_name) < 0)
2288                                 FILE_OP_ERROR(dir_name, "unlink");
2289                 }
2290         }
2291
2292         g_dir_close(dp);
2293         g_hash_table_destroy(wanted_files);
2294
2295         if (g_chdir(prev_dir) < 0) {
2296                 FILE_OP_ERROR(prev_dir, "chdir");
2297                 g_free(prev_dir);
2298                 return -1;
2299         }
2300
2301         g_free(prev_dir);
2302
2303         return 0;
2304 }
2305
2306 gint remove_all_numbered_files(const gchar *dir)
2307 {
2308         return remove_numbered_files(dir, 0, UINT_MAX);
2309 }
2310
2311 gint remove_dir_recursive(const gchar *dir)
2312 {
2313         GStatBuf s;
2314         GDir *dp;
2315         const gchar *dir_name;
2316         gchar *prev_dir;
2317
2318         if (g_stat(dir, &s) < 0) {
2319                 FILE_OP_ERROR(dir, "stat");
2320                 if (ENOENT == errno) return 0;
2321                 return -(errno);
2322         }
2323
2324         if (!S_ISDIR(s.st_mode)) {
2325                 if (claws_unlink(dir) < 0) {
2326                         FILE_OP_ERROR(dir, "unlink");
2327                         return -(errno);
2328                 }
2329
2330                 return 0;
2331         }
2332
2333         prev_dir = g_get_current_dir();
2334         /* g_print("prev_dir = %s\n", prev_dir); */
2335
2336         if (!path_cmp(prev_dir, dir)) {
2337                 g_free(prev_dir);
2338                 if (g_chdir("..") < 0) {
2339                         FILE_OP_ERROR(dir, "chdir");
2340                         return -(errno);
2341                 }
2342                 prev_dir = g_get_current_dir();
2343         }
2344
2345         if (g_chdir(dir) < 0) {
2346                 FILE_OP_ERROR(dir, "chdir");
2347                 g_free(prev_dir);
2348                 return -(errno);
2349         }
2350
2351         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2352                 g_warning("failed to open directory: %s", dir);
2353                 g_chdir(prev_dir);
2354                 g_free(prev_dir);
2355                 return -(errno);
2356         }
2357
2358         /* remove all files in the directory */
2359         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2360                 /* g_print("removing %s\n", dir_name); */
2361
2362                 if (is_dir_exist(dir_name)) {
2363                         gint ret;
2364
2365                         if ((ret = remove_dir_recursive(dir_name)) < 0) {
2366                                 g_warning("can't remove directory: %s", dir_name);
2367                                 return ret;
2368                         }
2369                 } else {
2370                         if (claws_unlink(dir_name) < 0)
2371                                 FILE_OP_ERROR(dir_name, "unlink");
2372                 }
2373         }
2374
2375         g_dir_close(dp);
2376
2377         if (g_chdir(prev_dir) < 0) {
2378                 FILE_OP_ERROR(prev_dir, "chdir");
2379                 g_free(prev_dir);
2380                 return -(errno);
2381         }
2382
2383         g_free(prev_dir);
2384
2385         if (g_rmdir(dir) < 0) {
2386                 FILE_OP_ERROR(dir, "rmdir");
2387                 return -(errno);
2388         }
2389
2390         return 0;
2391 }
2392
2393 /* convert line endings into CRLF. If the last line doesn't end with
2394  * linebreak, add it.
2395  */
2396 gchar *canonicalize_str(const gchar *str)
2397 {
2398         const gchar *p;
2399         guint new_len = 0;
2400         gchar *out, *outp;
2401
2402         for (p = str; *p != '\0'; ++p) {
2403                 if (*p != '\r') {
2404                         ++new_len;
2405                         if (*p == '\n')
2406                                 ++new_len;
2407                 }
2408         }
2409         if (p == str || *(p - 1) != '\n')
2410                 new_len += 2;
2411
2412         out = outp = g_malloc(new_len + 1);
2413         for (p = str; *p != '\0'; ++p) {
2414                 if (*p != '\r') {
2415                         if (*p == '\n')
2416                                 *outp++ = '\r';
2417                         *outp++ = *p;
2418                 }
2419         }
2420         if (p == str || *(p - 1) != '\n') {
2421                 *outp++ = '\r';
2422                 *outp++ = '\n';
2423         }
2424         *outp = '\0';
2425
2426         return out;
2427 }
2428
2429 gchar *normalize_newlines(const gchar *str)
2430 {
2431         const gchar *p;
2432         gchar *out, *outp;
2433
2434         out = outp = g_malloc(strlen(str) + 1);
2435         for (p = str; *p != '\0'; ++p) {
2436                 if (*p == '\r') {
2437                         if (*(p + 1) != '\n')
2438                                 *outp++ = '\n';
2439                 } else
2440                         *outp++ = *p;
2441         }
2442
2443         *outp = '\0';
2444
2445         return out;
2446 }
2447
2448 gchar *get_outgoing_rfc2822_str(FILE *fp)
2449 {
2450         gchar buf[BUFFSIZE];
2451         GString *str;
2452         gchar *ret;
2453
2454         str = g_string_new(NULL);
2455
2456         /* output header part */
2457         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2458                 strretchomp(buf);
2459                 if (!g_ascii_strncasecmp(buf, "Bcc:", 4)) {
2460                         gint next;
2461
2462                         for (;;) {
2463                                 next = fgetc(fp);
2464                                 if (next == EOF)
2465                                         break;
2466                                 else if (next != ' ' && next != '\t') {
2467                                         ungetc(next, fp);
2468                                         break;
2469                                 }
2470                                 if (claws_fgets(buf, sizeof(buf), fp) == NULL)
2471                                         break;
2472                         }
2473                 } else {
2474                         g_string_append(str, buf);
2475                         g_string_append(str, "\r\n");
2476                         if (buf[0] == '\0')
2477                                 break;
2478                 }
2479         }
2480
2481         /* output body part */
2482         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2483                 strretchomp(buf);
2484                 if (buf[0] == '.')
2485                         g_string_append_c(str, '.');
2486                 g_string_append(str, buf);
2487                 g_string_append(str, "\r\n");
2488         }
2489
2490         ret = str->str;
2491         g_string_free(str, FALSE);
2492
2493         return ret;
2494 }
2495
2496 /*
2497  * Create a new boundary in a way that it is very unlikely that this
2498  * will occur in the following text.  It would be easy to ensure
2499  * uniqueness if everything is either quoted-printable or base64
2500  * encoded (note that conversion is allowed), but because MIME bodies
2501  * may be nested, it may happen that the same boundary has already
2502  * been used.
2503  *
2504  *   boundary := 0*69<bchars> bcharsnospace
2505  *   bchars := bcharsnospace / " "
2506  *   bcharsnospace := DIGIT / ALPHA / "'" / "(" / ")" /
2507  *                  "+" / "_" / "," / "-" / "." /
2508  *                  "/" / ":" / "=" / "?"
2509  *
2510  * some special characters removed because of buggy MTAs
2511  */
2512
2513 gchar *generate_mime_boundary(const gchar *prefix)
2514 {
2515         static gchar tbl[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
2516                              "abcdefghijklmnopqrstuvwxyz"
2517                              "1234567890+_./=";
2518         gchar buf_uniq[24];
2519         gint i;
2520
2521         for (i = 0; i < sizeof(buf_uniq) - 1; i++)
2522                 buf_uniq[i] = tbl[g_random_int_range(0, sizeof(tbl) - 1)];
2523         buf_uniq[i] = '\0';
2524
2525         return g_strdup_printf("%s_/%s", prefix ? prefix : "MP",
2526                                buf_uniq);
2527 }
2528
2529 char *fgets_crlf(char *buf, int size, FILE *stream)
2530 {
2531         gboolean is_cr = FALSE;
2532         gboolean last_was_cr = FALSE;
2533         int c = 0;
2534         char *cs;
2535
2536         cs = buf;
2537         while (--size > 0 && (c = getc(stream)) != EOF)
2538         {
2539                 *cs++ = c;
2540                 is_cr = (c == '\r');
2541                 if (c == '\n') {
2542                         break;
2543                 }
2544                 if (last_was_cr) {
2545                         *(--cs) = '\n';
2546                         cs++;
2547                         ungetc(c, stream);
2548                         break;
2549                 }
2550                 last_was_cr = is_cr;
2551         }
2552         if (c == EOF && cs == buf)
2553                 return NULL;
2554
2555         *cs = '\0';
2556
2557         return buf;
2558 }
2559
2560 static gint execute_async(gchar *const argv[], const gchar *working_directory)
2561 {
2562         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
2563
2564         if (g_spawn_async(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
2565                           NULL, NULL, NULL, FALSE) == FALSE) {
2566                 g_warning("couldn't execute command: %s", argv[0]);
2567                 return -1;
2568         }
2569
2570         return 0;
2571 }
2572
2573 static gint execute_sync(gchar *const argv[], const gchar *working_directory)
2574 {
2575         gint status;
2576
2577         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
2578
2579 #ifdef G_OS_UNIX
2580         if (g_spawn_sync(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
2581                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
2582                 g_warning("couldn't execute command: %s", argv[0]);
2583                 return -1;
2584         }
2585
2586         if (WIFEXITED(status))
2587                 return WEXITSTATUS(status);
2588         else
2589                 return -1;
2590 #else
2591         if (g_spawn_sync(working_directory, (gchar **)argv, NULL,
2592                                 G_SPAWN_SEARCH_PATH|
2593                                 G_SPAWN_CHILD_INHERITS_STDIN|
2594                                 G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
2595                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
2596                 g_warning("couldn't execute command: %s", argv[0]);
2597                 return -1;
2598         }
2599
2600         return status;
2601 #endif
2602 }
2603
2604 gint execute_command_line(const gchar *cmdline, gboolean async,
2605                 const gchar *working_directory)
2606 {
2607         gchar **argv;
2608         gint ret;
2609
2610         debug_print("execute_command_line(): executing: %s\n", cmdline?cmdline:"(null)");
2611
2612         argv = strsplit_with_quote(cmdline, " ", 0);
2613
2614         if (async)
2615                 ret = execute_async(argv, working_directory);
2616         else
2617                 ret = execute_sync(argv, working_directory);
2618
2619         g_strfreev(argv);
2620
2621         return ret;
2622 }
2623
2624 gchar *get_command_output(const gchar *cmdline)
2625 {
2626         gchar *child_stdout;
2627         gint status;
2628
2629         cm_return_val_if_fail(cmdline != NULL, NULL);
2630
2631         debug_print("get_command_output(): executing: %s\n", cmdline);
2632
2633         if (g_spawn_command_line_sync(cmdline, &child_stdout, NULL, &status,
2634                                       NULL) == FALSE) {
2635                 g_warning("couldn't execute command: %s", cmdline);
2636                 return NULL;
2637         }
2638
2639         return child_stdout;
2640 }
2641
2642 static gint is_unchanged_uri_char(char c)
2643 {
2644         switch (c) {
2645                 case '(':
2646                 case ')':
2647                         return 0;
2648                 default:
2649                         return 1;
2650         }
2651 }
2652
2653 static void encode_uri(gchar *encoded_uri, gint bufsize, const gchar *uri)
2654 {
2655         int i;
2656         int k;
2657
2658         k = 0;
2659         for(i = 0; i < strlen(uri) ; i++) {
2660                 if (is_unchanged_uri_char(uri[i])) {
2661                         if (k + 2 >= bufsize)
2662                                 break;
2663                         encoded_uri[k++] = uri[i];
2664                 }
2665                 else {
2666                         char * hexa = "0123456789ABCDEF";
2667
2668                         if (k + 4 >= bufsize)
2669                                 break;
2670                         encoded_uri[k++] = '%';
2671                         encoded_uri[k++] = hexa[uri[i] / 16];
2672                         encoded_uri[k++] = hexa[uri[i] % 16];
2673                 }
2674         }
2675         encoded_uri[k] = 0;
2676 }
2677
2678 gint open_uri(const gchar *uri, const gchar *cmdline)
2679 {
2680
2681 #ifndef G_OS_WIN32
2682         gchar buf[BUFFSIZE];
2683         gchar *p;
2684         gchar encoded_uri[BUFFSIZE];
2685         cm_return_val_if_fail(uri != NULL, -1);
2686
2687         /* an option to choose whether to use encode_uri or not ? */
2688         encode_uri(encoded_uri, BUFFSIZE, uri);
2689
2690         if (cmdline &&
2691             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2692             !strchr(p + 2, '%'))
2693                 g_snprintf(buf, sizeof(buf), cmdline, encoded_uri);
2694         else {
2695                 if (cmdline)
2696                         g_warning("Open URI command-line is invalid "
2697                                   "(there must be only one '%%s'): %s",
2698                                   cmdline);
2699                 g_snprintf(buf, sizeof(buf), DEFAULT_BROWSER_CMD, encoded_uri);
2700         }
2701
2702         execute_command_line(buf, TRUE, NULL);
2703 #else
2704         ShellExecute(NULL, "open", uri, NULL, NULL, SW_SHOW);
2705 #endif
2706         return 0;
2707 }
2708
2709 gint open_txt_editor(const gchar *filepath, const gchar *cmdline)
2710 {
2711         gchar buf[BUFFSIZE];
2712         gchar *p;
2713
2714         cm_return_val_if_fail(filepath != NULL, -1);
2715
2716         if (cmdline &&
2717             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2718             !strchr(p + 2, '%'))
2719                 g_snprintf(buf, sizeof(buf), cmdline, filepath);
2720         else {
2721                 if (cmdline)
2722                         g_warning("Open Text Editor command-line is invalid "
2723                                   "(there must be only one '%%s'): %s",
2724                                   cmdline);
2725                 g_snprintf(buf, sizeof(buf), DEFAULT_EDITOR_CMD, filepath);
2726         }
2727
2728         execute_command_line(buf, TRUE, NULL);
2729
2730         return 0;
2731 }
2732
2733 time_t remote_tzoffset_sec(const gchar *zone)
2734 {
2735         static gchar ustzstr[] = "PSTPDTMSTMDTCSTCDTESTEDT";
2736         gchar zone3[4];
2737         gchar *p;
2738         gchar c;
2739         gint iustz;
2740         gint offset;
2741         time_t remoteoffset;
2742
2743         strncpy(zone3, zone, 3);
2744         zone3[3] = '\0';
2745         remoteoffset = 0;
2746
2747         if (sscanf(zone, "%c%d", &c, &offset) == 2 &&
2748             (c == '+' || c == '-')) {
2749                 remoteoffset = ((offset / 100) * 60 + (offset % 100)) * 60;
2750                 if (c == '-')
2751                         remoteoffset = -remoteoffset;
2752         } else if (!strncmp(zone, "UT" , 2) ||
2753                    !strncmp(zone, "GMT", 3)) {
2754                 remoteoffset = 0;
2755         } else if (strlen(zone3) == 3) {
2756                 for (p = ustzstr; *p != '\0'; p += 3) {
2757                         if (!g_ascii_strncasecmp(p, zone3, 3)) {
2758                                 iustz = ((gint)(p - ustzstr) / 3 + 1) / 2 - 8;
2759                                 remoteoffset = iustz * 3600;
2760                                 break;
2761                         }
2762                 }
2763                 if (*p == '\0')
2764                         return -1;
2765         } else if (strlen(zone3) == 1) {
2766                 switch (zone[0]) {
2767                 case 'Z': remoteoffset =   0; break;
2768                 case 'A': remoteoffset =  -1; break;
2769                 case 'B': remoteoffset =  -2; break;
2770                 case 'C': remoteoffset =  -3; break;
2771                 case 'D': remoteoffset =  -4; break;
2772                 case 'E': remoteoffset =  -5; break;
2773                 case 'F': remoteoffset =  -6; break;
2774                 case 'G': remoteoffset =  -7; break;
2775                 case 'H': remoteoffset =  -8; break;
2776                 case 'I': remoteoffset =  -9; break;
2777                 case 'K': remoteoffset = -10; break; /* J is not used */
2778                 case 'L': remoteoffset = -11; break;
2779                 case 'M': remoteoffset = -12; break;
2780                 case 'N': remoteoffset =   1; break;
2781                 case 'O': remoteoffset =   2; break;
2782                 case 'P': remoteoffset =   3; break;
2783                 case 'Q': remoteoffset =   4; break;
2784                 case 'R': remoteoffset =   5; break;
2785                 case 'S': remoteoffset =   6; break;
2786                 case 'T': remoteoffset =   7; break;
2787                 case 'U': remoteoffset =   8; break;
2788                 case 'V': remoteoffset =   9; break;
2789                 case 'W': remoteoffset =  10; break;
2790                 case 'X': remoteoffset =  11; break;
2791                 case 'Y': remoteoffset =  12; break;
2792                 default:  remoteoffset =   0; break;
2793                 }
2794                 remoteoffset = remoteoffset * 3600;
2795         } else
2796                 return -1;
2797
2798         return remoteoffset;
2799 }
2800
2801 time_t tzoffset_sec(time_t *now)
2802 {
2803         struct tm gmt, *lt;
2804         gint off;
2805         struct tm buf1, buf2;
2806 #ifdef G_OS_WIN32
2807         if (now && *now < 0)
2808                 return 0;
2809 #endif
2810         gmt = *gmtime_r(now, &buf1);
2811         lt = localtime_r(now, &buf2);
2812
2813         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2814
2815         if (lt->tm_year < gmt.tm_year)
2816                 off -= 24 * 60;
2817         else if (lt->tm_year > gmt.tm_year)
2818                 off += 24 * 60;
2819         else if (lt->tm_yday < gmt.tm_yday)
2820                 off -= 24 * 60;
2821         else if (lt->tm_yday > gmt.tm_yday)
2822                 off += 24 * 60;
2823
2824         if (off >= 24 * 60)             /* should be impossible */
2825                 off = 23 * 60 + 59;     /* if not, insert silly value */
2826         if (off <= -24 * 60)
2827                 off = -(23 * 60 + 59);
2828
2829         return off * 60;
2830 }
2831
2832 /* calculate timezone offset */
2833 gchar *tzoffset(time_t *now)
2834 {
2835         static gchar offset_string[6];
2836         struct tm gmt, *lt;
2837         gint off;
2838         gchar sign = '+';
2839         struct tm buf1, buf2;
2840 #ifdef G_OS_WIN32
2841         if (now && *now < 0)
2842                 return 0;
2843 #endif
2844         gmt = *gmtime_r(now, &buf1);
2845         lt = localtime_r(now, &buf2);
2846
2847         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2848
2849         if (lt->tm_year < gmt.tm_year)
2850                 off -= 24 * 60;
2851         else if (lt->tm_year > gmt.tm_year)
2852                 off += 24 * 60;
2853         else if (lt->tm_yday < gmt.tm_yday)
2854                 off -= 24 * 60;
2855         else if (lt->tm_yday > gmt.tm_yday)
2856                 off += 24 * 60;
2857
2858         if (off < 0) {
2859                 sign = '-';
2860                 off = -off;
2861         }
2862
2863         if (off >= 24 * 60)             /* should be impossible */
2864                 off = 23 * 60 + 59;     /* if not, insert silly value */
2865
2866         sprintf(offset_string, "%c%02d%02d", sign, off / 60, off % 60);
2867
2868         return offset_string;
2869 }
2870
2871 static void _get_rfc822_date(gchar *buf, gint len, gboolean hidetz)
2872 {
2873         struct tm *lt;
2874         time_t t;
2875         gchar day[4], mon[4];
2876         gint dd, hh, mm, ss, yyyy;
2877         struct tm buf1;
2878         gchar buf2[RFC822_DATE_BUFFSIZE];
2879
2880         t = time(NULL);
2881         if (hidetz)
2882                 lt = gmtime_r(&t, &buf1);
2883         else
2884                 lt = localtime_r(&t, &buf1);
2885
2886         if (sscanf(asctime_r(lt, buf2), "%3s %3s %d %d:%d:%d %d\n",
2887                day, mon, &dd, &hh, &mm, &ss, &yyyy) != 7)
2888                 g_warning("failed reading date/time");
2889
2890         g_snprintf(buf, len, "%s, %d %s %d %02d:%02d:%02d %s",
2891                    day, dd, mon, yyyy, hh, mm, ss, (hidetz? "-0000": tzoffset(&t)));
2892 }
2893
2894 void get_rfc822_date(gchar *buf, gint len)
2895 {
2896         _get_rfc822_date(buf, len, FALSE);
2897 }
2898
2899 void get_rfc822_date_hide_tz(gchar *buf, gint len)
2900 {
2901         _get_rfc822_date(buf, len, TRUE);
2902 }
2903
2904 void debug_set_mode(gboolean mode)
2905 {
2906         debug_mode = mode;
2907 }
2908
2909 gboolean debug_get_mode(void)
2910 {
2911         return debug_mode;
2912 }
2913
2914 void debug_print_real(const gchar *format, ...)
2915 {
2916         va_list args;
2917         gchar buf[BUFFSIZE];
2918
2919         if (!debug_mode) return;
2920
2921         va_start(args, format);
2922         g_vsnprintf(buf, sizeof(buf), format, args);
2923         va_end(args);
2924
2925         g_print("%s", buf);
2926 }
2927
2928
2929 const char * debug_srcname(const char *file)
2930 {
2931         const char *s = strrchr (file, '/');
2932         return s? s+1:file;
2933 }
2934
2935
2936 void * subject_table_lookup(GHashTable *subject_table, gchar * subject)
2937 {
2938         if (subject == NULL)
2939                 subject = "";
2940         else
2941                 subject += subject_get_prefix_length(subject);
2942
2943         return g_hash_table_lookup(subject_table, subject);
2944 }
2945
2946 void subject_table_insert(GHashTable *subject_table, gchar * subject,
2947                           void * data)
2948 {
2949         if (subject == NULL || *subject == 0)
2950                 return;
2951         subject += subject_get_prefix_length(subject);
2952         g_hash_table_insert(subject_table, subject, data);
2953 }
2954
2955 void subject_table_remove(GHashTable *subject_table, gchar * subject)
2956 {
2957         if (subject == NULL)
2958                 return;
2959
2960         subject += subject_get_prefix_length(subject);
2961         g_hash_table_remove(subject_table, subject);
2962 }
2963
2964 static regex_t u_regex;
2965 static gboolean u_init_;
2966
2967 void utils_free_regex(void)
2968 {
2969         if (u_init_) {
2970                 regfree(&u_regex);
2971                 u_init_ = FALSE;
2972         }
2973 }
2974
2975 /*!
2976  *\brief        Check if a string is prefixed with known (combinations)
2977  *              of prefixes. The function assumes that each prefix
2978  *              is terminated by zero or exactly _one_ space.
2979  *
2980  *\param        str String to check for a prefixes
2981  *
2982  *\return       int Number of chars in the prefix that should be skipped
2983  *              for a "clean" subject line. If no prefix was found, 0
2984  *              is returned.
2985  */
2986 int subject_get_prefix_length(const gchar *subject)
2987 {
2988         /*!< Array with allowable reply prefixes regexps. */
2989         static const gchar * const prefixes[] = {
2990                 "Re\\:",                        /* "Re:" */
2991                 "Re\\[[1-9][0-9]*\\]\\:",       /* "Re[XXX]:" (non-conforming news mail clients) */
2992                 "Antw\\:",                      /* "Antw:" (Dutch / German Outlook) */
2993                 "Aw\\:",                        /* "Aw:"   (German) */
2994                 "Antwort\\:",                   /* "Antwort:" (German Lotus Notes) */
2995                 "Res\\:",                       /* "Res:" (Spanish/Brazilian Outlook) */
2996                 "Fw\\:",                        /* "Fw:" Forward */
2997                 "Fwd\\:",                       /* "Fwd:" Forward */
2998                 "Enc\\:",                       /* "Enc:" Forward (Brazilian Outlook) */
2999                 "Odp\\:",                       /* "Odp:" Re (Polish Outlook) */
3000                 "Rif\\:",                       /* "Rif:" (Italian Outlook) */
3001                 "Sv\\:",                        /* "Sv" (Norwegian) */
3002                 "Vs\\:",                        /* "Vs" (Norwegian) */
3003                 "Ad\\:",                        /* "Ad" (Norwegian) */
3004                 "\347\255\224\345\244\215\\:",  /* "Re" (Chinese, UTF-8) */
3005                 "R\303\251f\\. \\:",            /* "R�f. :" (French Lotus Notes) */
3006                 "Re \\:",                       /* "Re :" (French Yahoo Mail) */
3007                 /* add more */
3008         };
3009         const int PREFIXES = sizeof prefixes / sizeof prefixes[0];
3010         int n;
3011         regmatch_t pos;
3012
3013         if (!subject) return 0;
3014         if (!*subject) return 0;
3015
3016         if (!u_init_) {
3017                 GString *s = g_string_new("");
3018
3019                 for (n = 0; n < PREFIXES; n++)
3020                         /* Terminate each prefix regexpression by a
3021                          * "\ ?" (zero or ONE space), and OR them */
3022                         g_string_append_printf(s, "(%s\\ ?)%s",
3023                                           prefixes[n],
3024                                           n < PREFIXES - 1 ?
3025                                           "|" : "");
3026
3027                 g_string_prepend(s, "(");
3028                 g_string_append(s, ")+");       /* match at least once */
3029                 g_string_prepend(s, "^\\ *");   /* from beginning of line */
3030
3031
3032                 /* We now have something like "^\ *((PREFIX1\ ?)|(PREFIX2\ ?))+"
3033                  * TODO: Should this be       "^\ *(((PREFIX1)|(PREFIX2))\ ?)+" ??? */
3034                 if (regcomp(&u_regex, s->str, REG_EXTENDED | REG_ICASE)) {
3035                         debug_print("Error compiling regexp %s\n", s->str);
3036                         g_string_free(s, TRUE);
3037                         return 0;
3038                 } else {
3039                         u_init_ = TRUE;
3040                         g_string_free(s, TRUE);
3041                 }
3042         }
3043
3044         if (!regexec(&u_regex, subject, 1, &pos, 0) && pos.rm_so != -1)
3045                 return pos.rm_eo;
3046         else
3047                 return 0;
3048 }
3049
3050 static guint g_stricase_hash(gconstpointer gptr)
3051 {
3052         guint hash_result = 0;
3053         const char *str;
3054
3055         for (str = gptr; str && *str; str++) {
3056                 hash_result += toupper(*str);
3057         }
3058
3059         return hash_result;
3060 }
3061
3062 static gint g_stricase_equal(gconstpointer gptr1, gconstpointer gptr2)
3063 {
3064         const char *str1 = gptr1;
3065         const char *str2 = gptr2;
3066
3067         return !strcasecmp(str1, str2);
3068 }
3069
3070 gint g_int_compare(gconstpointer a, gconstpointer b)
3071 {
3072         return GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b);
3073 }
3074
3075 /*
3076    quote_cmd_argument()
3077
3078    return a quoted string safely usable in argument of a command.
3079
3080    code is extracted and adapted from etPan! project -- DINH V. Ho�.
3081 */
3082
3083 gint quote_cmd_argument(gchar * result, guint size,
3084                         const gchar * path)
3085 {
3086         const gchar * p;
3087         gchar * result_p;
3088         guint remaining;
3089
3090         result_p = result;
3091         remaining = size;
3092
3093         for(p = path ; * p != '\0' ; p ++) {
3094
3095                 if (isalnum((guchar)*p) || (* p == '/')) {
3096                         if (remaining > 0) {
3097                                 * result_p = * p;
3098                                 result_p ++;
3099                                 remaining --;
3100                         }
3101                         else {
3102                                 result[size - 1] = '\0';
3103                                 return -1;
3104                         }
3105                 }
3106                 else {
3107                         if (remaining >= 2) {
3108                                 * result_p = '\\';
3109                                 result_p ++;
3110                                 * result_p = * p;
3111                                 result_p ++;
3112                                 remaining -= 2;
3113                         }
3114                         else {
3115                                 result[size - 1] = '\0';
3116                                 return -1;
3117                         }
3118                 }
3119         }
3120         if (remaining > 0) {
3121                 * result_p = '\0';
3122         }
3123         else {
3124                 result[size - 1] = '\0';
3125                 return -1;
3126         }
3127
3128         return 0;
3129 }
3130
3131 typedef struct
3132 {
3133         GNode           *parent;
3134         GNodeMapFunc     func;
3135         gpointer         data;
3136 } GNodeMapData;
3137
3138 static void g_node_map_recursive(GNode *node, gpointer data)
3139 {
3140         GNodeMapData *mapdata = (GNodeMapData *) data;
3141         GNode *newnode;
3142         GNodeMapData newmapdata;
3143         gpointer newdata;
3144
3145         newdata = mapdata->func(node->data, mapdata->data);
3146         if (newdata != NULL) {
3147                 newnode = g_node_new(newdata);
3148                 g_node_append(mapdata->parent, newnode);
3149
3150                 newmapdata.parent = newnode;
3151                 newmapdata.func = mapdata->func;
3152                 newmapdata.data = mapdata->data;
3153
3154                 g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &newmapdata);
3155         }
3156 }
3157
3158 GNode *g_node_map(GNode *node, GNodeMapFunc func, gpointer data)
3159 {
3160         GNode *root;
3161         GNodeMapData mapdata;
3162
3163         cm_return_val_if_fail(node != NULL, NULL);
3164         cm_return_val_if_fail(func != NULL, NULL);
3165
3166         root = g_node_new(func(node->data, data));
3167
3168         mapdata.parent = root;
3169         mapdata.func = func;
3170         mapdata.data = data;
3171
3172         g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &mapdata);
3173
3174         return root;
3175 }
3176
3177 #define HEX_TO_INT(val, hex)                    \
3178 {                                               \
3179         gchar c = hex;                          \
3180                                                 \
3181         if ('0' <= c && c <= '9') {             \
3182                 val = c - '0';                  \
3183         } else if ('a' <= c && c <= 'f') {      \
3184                 val = c - 'a' + 10;             \
3185         } else if ('A' <= c && c <= 'F') {      \
3186                 val = c - 'A' + 10;             \
3187         } else {                                \
3188                 val = -1;                       \
3189         }                                       \
3190 }
3191
3192 gboolean get_hex_value(guchar *out, gchar c1, gchar c2)
3193 {
3194         gint hi, lo;
3195
3196         HEX_TO_INT(hi, c1);
3197         HEX_TO_INT(lo, c2);
3198
3199         if (hi == -1 || lo == -1)
3200                 return FALSE;
3201
3202         *out = (hi << 4) + lo;
3203         return TRUE;
3204 }
3205
3206 #define INT_TO_HEX(hex, val)            \
3207 {                                       \
3208         if ((val) < 10)                 \
3209                 hex = '0' + (val);      \
3210         else                            \
3211                 hex = 'A' + (val) - 10; \
3212 }
3213
3214 void get_hex_str(gchar *out, guchar ch)
3215 {
3216         gchar hex;
3217
3218         INT_TO_HEX(hex, ch >> 4);
3219         *out++ = hex;
3220         INT_TO_HEX(hex, ch & 0x0f);
3221         *out   = hex;
3222 }
3223
3224 #undef REF_DEBUG
3225 #ifndef REF_DEBUG
3226 #define G_PRINT_REF 1 == 1 ? (void) 0 : (void)
3227 #else
3228 #define G_PRINT_REF g_print
3229 #endif
3230
3231 /*!
3232  *\brief        Register ref counted pointer. It is based on GBoxed, so should
3233  *              work with anything that uses the GType system. The semantics
3234  *              are similar to a C++ auto pointer, with the exception that
3235  *              C doesn't have automatic closure (calling destructors) when
3236  *              exiting a block scope.
3237  *              Use the \ref G_TYPE_AUTO_POINTER macro instead of calling this
3238  *              function directly.
3239  *
3240  *\return       GType A GType type.
3241  */
3242 GType g_auto_pointer_register(void)
3243 {
3244         static GType auto_pointer_type;
3245         if (!auto_pointer_type)
3246                 auto_pointer_type =
3247                         g_boxed_type_register_static
3248                                 ("G_TYPE_AUTO_POINTER",
3249                                  (GBoxedCopyFunc) g_auto_pointer_copy,
3250                                  (GBoxedFreeFunc) g_auto_pointer_free);
3251         return auto_pointer_type;
3252 }
3253
3254 /*!
3255  *\brief        Structure with g_new() allocated pointer guarded by the
3256  *              auto pointer
3257  */
3258 typedef struct AutoPointerRef {
3259         void          (*free) (gpointer);
3260         gpointer        pointer;
3261         glong           cnt;
3262 } AutoPointerRef;
3263
3264 /*!
3265  *\brief        The auto pointer opaque structure that references the
3266  *              pointer guard block.
3267  */
3268 typedef struct AutoPointer {
3269         AutoPointerRef *ref;
3270         gpointer        ptr; /*!< access to protected pointer */
3271 } AutoPointer;
3272
3273 /*!
3274  *\brief        Creates an auto pointer for a g_new()ed pointer. Example:
3275  *
3276  *\code
3277  *
3278  *              ... tell gtk_list_store it should use a G_TYPE_AUTO_POINTER
3279  *              ... when assigning, copying and freeing storage elements
3280  *
3281  *              gtk_list_store_new(N_S_COLUMNS,
3282  *                                 G_TYPE_AUTO_POINTER,
3283  *                                 -1);
3284  *
3285  *
3286  *              Template *precious_data = g_new0(Template, 1);
3287  *              g_pointer protect = g_auto_pointer_new(precious_data);
3288  *
3289  *              gtk_list_store_set(container, &iter,
3290  *                                 S_DATA, protect,
3291  *                                 -1);
3292  *
3293  *              ... the gtk_list_store has copied the pointer and
3294  *              ... incremented its reference count, we should free
3295  *              ... the auto pointer (in C++ a destructor would do
3296  *              ... this for us when leaving block scope)
3297  *
3298  *              g_auto_pointer_free(protect);
3299  *
3300  *              ... gtk_list_store_set() now manages the data. When
3301  *              ... *explicitly* requesting a pointer from the list
3302  *              ... store, don't forget you get a copy that should be
3303  *              ... freed with g_auto_pointer_free() eventually.
3304  *
3305  *\endcode
3306  *
3307  *\param        pointer Pointer to be guarded.
3308  *
3309  *\return       GAuto * Pointer that should be used in containers with
3310  *              GType support.
3311  */
3312 GAuto *g_auto_pointer_new(gpointer p)
3313 {
3314         AutoPointerRef *ref;
3315         AutoPointer    *ptr;
3316
3317         if (p == NULL)
3318                 return NULL;
3319
3320         ref = g_new0(AutoPointerRef, 1);
3321         ptr = g_new0(AutoPointer, 1);
3322
3323         ref->pointer = p;
3324         ref->free = g_free;
3325         ref->cnt = 1;
3326
3327         ptr->ref = ref;
3328         ptr->ptr = p;
3329
3330 #ifdef REF_DEBUG
3331         G_PRINT_REF ("XXXX ALLOC(%lx)\n", p);
3332 #endif
3333         return ptr;
3334 }
3335
3336 /*!
3337  *\brief        Allocate an autopointer using the passed \a free function to
3338  *              free the guarded pointer
3339  */
3340 GAuto *g_auto_pointer_new_with_free(gpointer p, GFreeFunc free_)
3341 {
3342         AutoPointer *aptr;
3343
3344         if (p == NULL)
3345                 return NULL;
3346
3347         aptr = g_auto_pointer_new(p);
3348         aptr->ref->free = free_;
3349         return aptr;
3350 }
3351
3352 gpointer g_auto_pointer_get_ptr(GAuto *auto_ptr)
3353 {
3354         if (auto_ptr == NULL)
3355                 return NULL;
3356         return ((AutoPointer *) auto_ptr)->ptr;
3357 }
3358
3359 /*!
3360  *\brief        Copies an auto pointer by. It's mostly not necessary
3361  *              to call this function directly, unless you copy/assign
3362  *              the guarded pointer.
3363  *
3364  *\param        auto_ptr Auto pointer returned by previous call to
3365  *              g_auto_pointer_new_XXX()
3366  *
3367  *\return       gpointer An auto pointer
3368  */
3369 GAuto *g_auto_pointer_copy(GAuto *auto_ptr)
3370 {
3371         AutoPointer     *ptr;
3372         AutoPointerRef  *ref;
3373         AutoPointer     *newp;
3374
3375         if (auto_ptr == NULL)
3376                 return NULL;
3377
3378         ptr = auto_ptr;
3379         ref = ptr->ref;
3380         newp = g_new0(AutoPointer, 1);
3381
3382         newp->ref = ref;
3383         newp->ptr = ref->pointer;
3384         ++(ref->cnt);
3385
3386 #ifdef REF_DEBUG
3387         G_PRINT_REF ("XXXX COPY(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3388 #endif
3389         return newp;
3390 }
3391
3392 /*!
3393  *\brief        Free an auto pointer
3394  */
3395 void g_auto_pointer_free(GAuto *auto_ptr)
3396 {
3397         AutoPointer     *ptr;
3398         AutoPointerRef  *ref;
3399
3400         if (auto_ptr == NULL)
3401                 return;
3402
3403         ptr = auto_ptr;
3404         ref = ptr->ref;
3405
3406         if (--(ref->cnt) == 0) {
3407 #ifdef REF_DEBUG
3408                 G_PRINT_REF ("XXXX FREE(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3409 #endif
3410                 ref->free(ref->pointer);
3411                 g_free(ref);
3412         }
3413 #ifdef REF_DEBUG
3414         else
3415                 G_PRINT_REF ("XXXX DEREF(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3416 #endif
3417         g_free(ptr);
3418 }
3419
3420 void replace_returns(gchar *str)
3421 {
3422         if (!str)
3423                 return;
3424
3425         while (strstr(str, "\n")) {
3426                 *strstr(str, "\n") = ' ';
3427         }
3428         while (strstr(str, "\r")) {
3429                 *strstr(str, "\r") = ' ';
3430         }
3431 }
3432
3433 /* get_uri_part() - retrieves a URI starting from scanpos.
3434                     Returns TRUE if successful */
3435 gboolean get_uri_part(const gchar *start, const gchar *scanpos,
3436                              const gchar **bp, const gchar **ep, gboolean hdr)
3437 {
3438         const gchar *ep_;
3439         gint parenthese_cnt = 0;
3440
3441         cm_return_val_if_fail(start != NULL, FALSE);
3442         cm_return_val_if_fail(scanpos != NULL, FALSE);
3443         cm_return_val_if_fail(bp != NULL, FALSE);
3444         cm_return_val_if_fail(ep != NULL, FALSE);
3445
3446         *bp = scanpos;
3447
3448         /* find end point of URI */
3449         for (ep_ = scanpos; *ep_ != '\0'; ep_ = g_utf8_next_char(ep_)) {
3450                 gunichar u = g_utf8_get_char_validated(ep_, -1);
3451                 if (!g_unichar_isgraph(u) ||
3452                     u == (gunichar)-1 ||
3453                     strchr("[]{}<>\"", *ep_)) {
3454                         break;
3455                 } else if (strchr("(", *ep_)) {
3456                         parenthese_cnt++;
3457                 } else if (strchr(")", *ep_)) {
3458                         if (parenthese_cnt > 0)
3459                                 parenthese_cnt--;
3460                         else
3461                                 break;
3462                 }
3463         }
3464
3465         /* no punctuation at end of string */
3466
3467         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
3468          * should pass some URI type to this function and decide on that whether
3469          * to perform punctuation stripping */
3470
3471 #define IS_REAL_PUNCT(ch)       (g_ascii_ispunct(ch) && !strchr("/?=-_~)", ch))
3472
3473         for (; ep_ - 1 > scanpos + 1 &&
3474                IS_REAL_PUNCT(*(ep_ - 1));
3475              ep_--)
3476                 ;
3477
3478 #undef IS_REAL_PUNCT
3479
3480         *ep = ep_;
3481
3482         return TRUE;
3483 }
3484
3485 gchar *make_uri_string(const gchar *bp, const gchar *ep)
3486 {
3487         while (bp && *bp && g_ascii_isspace(*bp))
3488                 bp++;
3489         return g_strndup(bp, ep - bp);
3490 }
3491
3492 /* valid mail address characters */
3493 #define IS_RFC822_CHAR(ch) \
3494         (IS_ASCII(ch) && \
3495          (ch) > 32   && \
3496          (ch) != 127 && \
3497          !g_ascii_isspace(ch) && \
3498          !strchr("(),;<>\"", (ch)))
3499
3500 /* alphabet and number within 7bit ASCII */
3501 #define IS_ASCII_ALNUM(ch)      (IS_ASCII(ch) && g_ascii_isalnum(ch))
3502 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
3503
3504 static GHashTable *create_domain_tab(void)
3505 {
3506         gint n;
3507         GHashTable *htab = g_hash_table_new(g_stricase_hash, g_stricase_equal);
3508
3509         cm_return_val_if_fail(htab, NULL);
3510         for (n = 0; n < sizeof toplvl_domains / sizeof toplvl_domains[0]; n++)
3511                 g_hash_table_insert(htab, (gpointer) toplvl_domains[n], (gpointer) toplvl_domains[n]);
3512         return htab;
3513 }
3514
3515 static gboolean is_toplvl_domain(GHashTable *tab, const gchar *first, const gchar *last)
3516 {
3517         gchar buf[BUFFSIZE + 1];
3518         const gchar *m = buf + BUFFSIZE + 1;
3519         register gchar *p;
3520
3521         if (last - first > BUFFSIZE || first > last)
3522                 return FALSE;
3523
3524         for (p = buf; p < m &&  first < last; *p++ = *first++)
3525                 ;
3526         *p = 0;
3527
3528         return g_hash_table_lookup(tab, buf) != NULL;
3529 }
3530
3531 /* get_email_part() - retrieves an email address. Returns TRUE if successful */
3532 gboolean get_email_part(const gchar *start, const gchar *scanpos,
3533                                const gchar **bp, const gchar **ep, gboolean hdr)
3534 {
3535         /* more complex than the uri part because we need to scan back and forward starting from
3536          * the scan position. */
3537         gboolean result = FALSE;
3538         const gchar *bp_ = NULL;
3539         const gchar *ep_ = NULL;
3540         static GHashTable *dom_tab;
3541         const gchar *last_dot = NULL;
3542         const gchar *prelast_dot = NULL;
3543         const gchar *last_tld_char = NULL;
3544
3545         /* the informative part of the email address (describing the name
3546          * of the email address owner) may contain quoted parts. the
3547          * closure stack stores the last encountered quotes. */
3548         gchar closure_stack[128];
3549         gchar *ptr = closure_stack;
3550
3551         cm_return_val_if_fail(start != NULL, FALSE);
3552         cm_return_val_if_fail(scanpos != NULL, FALSE);
3553         cm_return_val_if_fail(bp != NULL, FALSE);
3554         cm_return_val_if_fail(ep != NULL, FALSE);
3555
3556         if (hdr) {
3557                 const gchar *start_quote = NULL;
3558                 const gchar *end_quote = NULL;
3559 search_again:
3560                 /* go to the real start */
3561                 if (start[0] == ',')
3562                         start++;
3563                 if (start[0] == ';')
3564                         start++;
3565                 while (start[0] == '\n' || start[0] == '\r')
3566                         start++;
3567                 while (start[0] == ' ' || start[0] == '\t')
3568                         start++;
3569
3570                 *bp = start;
3571
3572                 /* check if there are quotes (to skip , in them) */
3573                 if (*start == '"') {
3574                         start_quote = start;
3575                         start++;
3576                         end_quote = strstr(start, "\"");
3577                 } else {
3578                         start_quote = NULL;
3579                         end_quote = NULL;
3580                 }
3581
3582                 /* skip anything between quotes */
3583                 if (start_quote && end_quote) {
3584                         start = end_quote;
3585
3586                 }
3587
3588                 /* find end (either , or ; or end of line) */
3589                 if (strstr(start, ",") && strstr(start, ";"))
3590                         *ep = strstr(start,",") < strstr(start, ";")
3591                                 ? strstr(start, ",") : strstr(start, ";");
3592                 else if (strstr(start, ","))
3593                         *ep = strstr(start, ",");
3594                 else if (strstr(start, ";"))
3595                         *ep = strstr(start, ";");
3596                 else
3597                         *ep = start+strlen(start);
3598
3599                 /* go back to real start */
3600                 if (start_quote && end_quote) {
3601                         start = start_quote;
3602                 }
3603
3604                 /* check there's still an @ in that, or search
3605                  * further if possible */
3606                 if (strstr(start, "@") && strstr(start, "@") < *ep)
3607                         return TRUE;
3608                 else if (*ep < start+strlen(start)) {
3609                         start = *ep;
3610                         goto search_again;
3611                 } else if (start_quote && strstr(start, "\"") && strstr(start, "\"") < *ep) {
3612                         *bp = start_quote;
3613                         return TRUE;
3614                 } else
3615                         return FALSE;
3616         }
3617
3618         if (!dom_tab)
3619                 dom_tab = create_domain_tab();
3620         cm_return_val_if_fail(dom_tab, FALSE);
3621
3622         /* scan start of address */
3623         for (bp_ = scanpos - 1;
3624              bp_ >= start && IS_RFC822_CHAR(*(const guchar *)bp_); bp_--)
3625                 ;
3626
3627         /* TODO: should start with an alnum? */
3628         bp_++;
3629         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*(const guchar *)bp_); bp_++)
3630                 ;
3631
3632         if (bp_ != scanpos) {
3633                 /* scan end of address */
3634                 for (ep_ = scanpos + 1;
3635                      *ep_ && IS_RFC822_CHAR(*(const guchar *)ep_); ep_++)
3636                         if (*ep_ == '.') {
3637                                 prelast_dot = last_dot;
3638                                 last_dot = ep_;
3639                                 if (*(last_dot + 1) == '.') {
3640                                         if (prelast_dot == NULL)
3641                                                 return FALSE;
3642                                         last_dot = prelast_dot;
3643                                         break;
3644                                 }
3645                         }
3646
3647                 /* TODO: really should terminate with an alnum? */
3648                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*(const guchar *)ep_);
3649                      --ep_)
3650                         ;
3651                 ep_++;
3652
3653                 if (last_dot == NULL)
3654                         return FALSE;
3655                 if (last_dot >= ep_)
3656                         last_dot = prelast_dot;
3657                 if (last_dot == NULL || (scanpos + 1 >= last_dot))
3658                         return FALSE;
3659                 last_dot++;
3660
3661                 for (last_tld_char = last_dot; last_tld_char < ep_; last_tld_char++)
3662                         if (*last_tld_char == '?')
3663                                 break;
3664
3665                 if (is_toplvl_domain(dom_tab, last_dot, last_tld_char))
3666                         result = TRUE;
3667
3668                 *ep = ep_;
3669                 *bp = bp_;
3670         }
3671
3672         if (!result) return FALSE;
3673
3674         if (*ep_ && bp_ != start && *(bp_ - 1) == '"' && *(ep_) == '"'
3675         && *(ep_ + 1) == ' ' && *(ep_ + 2) == '<'
3676         && IS_RFC822_CHAR(*(ep_ + 3))) {
3677                 /* this informative part with an @ in it is
3678                  * followed by the email address */
3679                 ep_ += 3;
3680
3681                 /* go to matching '>' (or next non-rfc822 char, like \n) */
3682                 for (; *ep_ != '>' && *ep_ != '\0' && IS_RFC822_CHAR(*ep_); ep_++)
3683                         ;
3684
3685                 /* include the bracket */
3686                 if (*ep_ == '>') ep_++;
3687
3688                 /* include the leading quote */
3689                 bp_--;
3690
3691                 *ep = ep_;
3692                 *bp = bp_;
3693                 return TRUE;
3694         }
3695
3696         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
3697         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
3698                 return FALSE;
3699
3700         /* see if this is <bracketed>; in this case we also scan for the informative part. */
3701         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
3702                 return TRUE;
3703
3704 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
3705 #define IN_STACK()      (ptr > closure_stack)
3706 /* has underrun check */
3707 #define POP_STACK()     if(IN_STACK()) --ptr
3708 /* has overrun check */
3709 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
3710 /* has underrun check */
3711 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
3712
3713         ep_++;
3714
3715         /* scan for the informative part. */
3716         for (bp_ -= 2; bp_ >= start; bp_--) {
3717                 /* if closure on the stack keep scanning */
3718                 if (PEEK_STACK() == *bp_) {
3719                         POP_STACK();
3720                         continue;
3721                 }
3722                 if (!IN_STACK() && (*bp_ == '\'' || *bp_ == '"')) {
3723                         PUSH_STACK(*bp_);
3724                         continue;
3725                 }
3726
3727                 /* if nothing in the closure stack, do the special conditions
3728                  * the following if..else expression simply checks whether
3729                  * a token is acceptable. if not acceptable, the clause
3730                  * should terminate the loop with a 'break' */
3731                 if (!PEEK_STACK()) {
3732                         if (*bp_ == '-'
3733                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
3734                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
3735                                 /* hyphens are allowed, but only in
3736                                    between alnums */
3737                         } else if (strchr(" \"'", *bp_)) {
3738                                 /* but anything not being a punctiation
3739                                    is ok */
3740                         } else {
3741                                 break; /* anything else is rejected */
3742                         }
3743                 }
3744         }
3745
3746         bp_++;
3747
3748         /* scan forward (should start with an alnum) */
3749         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
3750                 ;
3751 #undef PEEK_STACK
3752 #undef PUSH_STACK
3753 #undef POP_STACK
3754 #undef IN_STACK
3755 #undef FULL_STACK
3756
3757
3758         *bp = bp_;
3759         *ep = ep_;
3760
3761         return result;
3762 }
3763
3764 #undef IS_QUOTE
3765 #undef IS_ASCII_ALNUM
3766 #undef IS_RFC822_CHAR
3767
3768 gchar *make_email_string(const gchar *bp, const gchar *ep)
3769 {
3770         /* returns a mailto: URI; mailto: is also used to detect the
3771          * uri type later on in the button_pressed signal handler */
3772         gchar *tmp;
3773         gchar *result;
3774         gchar *colon, *at;
3775
3776         tmp = g_strndup(bp, ep - bp);
3777
3778         /* If there is a colon in the username part of the address,
3779          * we're dealing with an URI for some other protocol - do
3780          * not prefix with mailto: in such case. */
3781         colon = strchr(tmp, ':');
3782         at = strchr(tmp, '@');
3783         if (colon != NULL && at != NULL && colon < at) {
3784                 result = tmp;
3785         } else {
3786                 result = g_strconcat("mailto:", tmp, NULL);
3787                 g_free(tmp);
3788         }
3789
3790         return result;
3791 }
3792
3793 gchar *make_http_string(const gchar *bp, const gchar *ep)
3794 {
3795         /* returns an http: URI; */
3796         gchar *tmp;
3797         gchar *result;
3798
3799         while (bp && *bp && g_ascii_isspace(*bp))
3800                 bp++;
3801         tmp = g_strndup(bp, ep - bp);
3802         result = g_strconcat("http://", tmp, NULL);
3803         g_free(tmp);
3804
3805         return result;
3806 }
3807
3808 static gchar *mailcap_get_command_in_file(const gchar *path, const gchar *type, const gchar *file_to_open)
3809 {
3810         FILE *fp = claws_fopen(path, "rb");
3811         gchar buf[BUFFSIZE];
3812         gchar *result = NULL;
3813         if (!fp)
3814                 return NULL;
3815         while (claws_fgets(buf, sizeof (buf), fp) != NULL) {
3816                 gchar **parts = g_strsplit(buf, ";", 3);
3817                 gchar *trimmed = parts[0];
3818                 while (trimmed[0] == ' ' || trimmed[0] == '\t')
3819                         trimmed++;
3820                 while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
3821                         trimmed[strlen(trimmed)-1] = '\0';
3822
3823                 if (!strcmp(trimmed, type)) {
3824                         gboolean needsterminal = FALSE;
3825                         if (parts[2] && strstr(parts[2], "needsterminal")) {
3826                                 needsterminal = TRUE;
3827                         }
3828                         if (parts[2] && strstr(parts[2], "test=")) {
3829                                 gchar *orig_testcmd = g_strdup(strstr(parts[2], "test=")+5);
3830                                 gchar *testcmd = orig_testcmd;
3831                                 if (strstr(testcmd,";"))
3832                                         *(strstr(testcmd,";")) = '\0';
3833                                 while (testcmd[0] == ' ' || testcmd[0] == '\t')
3834                                         testcmd++;
3835                                 while (testcmd[strlen(testcmd)-1] == '\n')
3836                                         testcmd[strlen(testcmd)-1] = '\0';
3837                                 while (testcmd[strlen(testcmd)-1] == '\r')
3838                                         testcmd[strlen(testcmd)-1] = '\0';
3839                                 while (testcmd[strlen(testcmd)-1] == ' ' || testcmd[strlen(testcmd)-1] == '\t')
3840                                         testcmd[strlen(testcmd)-1] = '\0';
3841
3842                                 if (strstr(testcmd, "%s")) {
3843                                         gchar *tmp = g_strdup_printf(testcmd, file_to_open);
3844                                         gint res = system(tmp);
3845                                         g_free(tmp);
3846                                         g_free(orig_testcmd);
3847
3848                                         if (res != 0) {
3849                                                 g_strfreev(parts);
3850                                                 continue;
3851                                         }
3852                                 } else {
3853                                         gint res = system(testcmd);
3854                                         g_free(orig_testcmd);
3855
3856                                         if (res != 0) {
3857                                                 g_strfreev(parts);
3858                                                 continue;
3859                                         }
3860                                 }
3861                         }
3862
3863                         trimmed = parts[1];
3864                         while (trimmed[0] == ' ' || trimmed[0] == '\t')
3865                                 trimmed++;
3866                         while (trimmed[strlen(trimmed)-1] == '\n')
3867                                 trimmed[strlen(trimmed)-1] = '\0';
3868                         while (trimmed[strlen(trimmed)-1] == '\r')
3869                                 trimmed[strlen(trimmed)-1] = '\0';
3870                         while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
3871                                 trimmed[strlen(trimmed)-1] = '\0';
3872                         result = g_strdup(trimmed);
3873                         g_strfreev(parts);
3874                         claws_fclose(fp);
3875                         if (needsterminal) {
3876                                 gchar *tmp = g_strdup_printf("xterm -e %s", result);
3877                                 g_free(result);
3878                                 result = tmp;
3879                         }
3880                         return result;
3881                 }
3882                 g_strfreev(parts);
3883         }
3884         claws_fclose(fp);
3885         return NULL;
3886 }
3887 gchar *mailcap_get_command_for_type(const gchar *type, const gchar *file_to_open)
3888 {
3889         gchar *result = NULL;
3890         gchar *path = NULL;
3891         if (type == NULL)
3892                 return NULL;
3893         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
3894         result = mailcap_get_command_in_file(path, type, file_to_open);
3895         g_free(path);
3896         if (result)
3897                 return result;
3898         result = mailcap_get_command_in_file("/etc/mailcap", type, file_to_open);
3899         return result;
3900 }
3901
3902 void mailcap_update_default(const gchar *type, const gchar *command)
3903 {
3904         gchar *path = NULL, *outpath = NULL;
3905         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
3906         outpath = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap.new", NULL);
3907         FILE *fp = claws_fopen(path, "rb");
3908         FILE *outfp = NULL;
3909         gchar buf[BUFFSIZE];
3910         gboolean err = FALSE;
3911
3912         if (!fp) {
3913                 fp = claws_fopen(path, "a");
3914                 if (!fp) {
3915                         g_warning("failed to create file %s", path);
3916                         g_free(path);
3917                         g_free(outpath);
3918                         return;
3919                 }
3920                 fp = g_freopen(path, "rb", fp);
3921                 if (!fp) {
3922                         g_warning("failed to reopen file %s", path);
3923                         g_free(path);
3924                         g_free(outpath);
3925                         return;
3926                 }
3927         }
3928
3929         outfp = claws_fopen(outpath, "wb");
3930         if (!outfp) {
3931                 g_warning("failed to create file %s", outpath);
3932                 g_free(path);
3933                 g_free(outpath);
3934                 claws_fclose(fp);
3935                 return;
3936         }
3937         while (fp && claws_fgets(buf, sizeof (buf), fp) != NULL) {
3938                 gchar **parts = g_strsplit(buf, ";", 3);
3939                 gchar *trimmed = parts[0];
3940                 while (trimmed[0] == ' ')
3941                         trimmed++;
3942                 while (trimmed[strlen(trimmed)-1] == ' ')
3943                         trimmed[strlen(trimmed)-1] = '\0';
3944
3945                 if (!strcmp(trimmed, type)) {
3946                         g_strfreev(parts);
3947                         continue;
3948                 }
3949                 else {
3950                         if(claws_fputs(buf, outfp) == EOF) {
3951                                 err = TRUE;
3952                                 break;
3953                         }
3954                 }
3955                 g_strfreev(parts);
3956         }
3957         if (fprintf(outfp, "%s; %s\n", type, command) < 0)
3958                 err = TRUE;
3959
3960         if (fp)
3961                 claws_fclose(fp);
3962
3963         if (claws_safe_fclose(outfp) == EOF)
3964                 err = TRUE;
3965
3966         if (!err)
3967                 g_rename(outpath, path);
3968
3969         g_free(path);
3970         g_free(outpath);
3971 }
3972
3973 /* crude test to see if a file is an email. */
3974 gboolean file_is_email (const gchar *filename)
3975 {
3976         FILE *fp = NULL;
3977         gchar buffer[2048];
3978         gint i = 0;
3979         gint score = 0;
3980         if (filename == NULL)
3981                 return FALSE;
3982         if ((fp = claws_fopen(filename, "rb")) == NULL)
3983                 return FALSE;
3984         while (i < 60 && score < 3
3985                && claws_fgets(buffer, sizeof (buffer), fp) != NULL) {
3986                 if (!strncmp(buffer, "From:", strlen("From:")))
3987                         score++;
3988                 else if (!strncmp(buffer, "Date:", strlen("Date:")))
3989                         score++;
3990                 else if (!strncmp(buffer, "Message-ID:", strlen("Message-ID:")))
3991                         score++;
3992                 else if (!strncmp(buffer, "Subject:", strlen("Subject:")))
3993                         score++;
3994                 i++;
3995         }
3996         claws_fclose(fp);
3997         return (score >= 3);
3998 }
3999
4000 gboolean sc_g_list_bigger(GList *list, gint max)
4001 {
4002         GList *cur = list;
4003         int i = 0;
4004         while (cur && i <= max+1) {
4005                 i++;
4006                 cur = cur->next;
4007         }
4008         return (i > max);
4009 }
4010
4011 gboolean sc_g_slist_bigger(GSList *list, gint max)
4012 {
4013         GSList *cur = list;
4014         int i = 0;
4015         while (cur && i <= max+1) {
4016                 i++;
4017                 cur = cur->next;
4018         }
4019         return (i > max);
4020 }
4021
4022 const gchar *daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4023 const gchar *monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4024                              NULL, NULL, NULL, NULL, NULL, NULL};
4025 const gchar *s_daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4026 const gchar *s_monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4027                              NULL, NULL, NULL, NULL, NULL, NULL};
4028
4029 gint daynames_len[] =     {0,0,0,0,0,0,0};
4030 gint monthnames_len[] =   {0,0,0,0,0,0,
4031                                  0,0,0,0,0,0};
4032 gint s_daynames_len[] =   {0,0,0,0,0,0,0};
4033 gint s_monthnames_len[] = {0,0,0,0,0,0,
4034                                  0,0,0,0,0,0};
4035 const gchar *s_am_up = NULL;
4036 const gchar *s_pm_up = NULL;
4037 const gchar *s_am_low = NULL;
4038 const gchar *s_pm_low = NULL;
4039
4040 gint s_am_up_len = 0;
4041 gint s_pm_up_len = 0;
4042 gint s_am_low_len = 0;
4043 gint s_pm_low_len = 0;
4044
4045 static gboolean time_names_init_done = FALSE;
4046
4047 static void init_time_names(void)
4048 {
4049         int i = 0;
4050
4051         daynames[0] = C_("Complete day name for use by strftime", "Sunday");
4052         daynames[1] = C_("Complete day name for use by strftime", "Monday");
4053         daynames[2] = C_("Complete day name for use by strftime", "Tuesday");
4054         daynames[3] = C_("Complete day name for use by strftime", "Wednesday");
4055         daynames[4] = C_("Complete day name for use by strftime", "Thursday");
4056         daynames[5] = C_("Complete day name for use by strftime", "Friday");
4057         daynames[6] = C_("Complete day name for use by strftime", "Saturday");
4058
4059         monthnames[0] = C_("Complete month name for use by strftime", "January");
4060         monthnames[1] = C_("Complete month name for use by strftime", "February");
4061         monthnames[2] = C_("Complete month name for use by strftime", "March");
4062         monthnames[3] = C_("Complete month name for use by strftime", "April");
4063         monthnames[4] = C_("Complete month name for use by strftime", "May");
4064         monthnames[5] = C_("Complete month name for use by strftime", "June");
4065         monthnames[6] = C_("Complete month name for use by strftime", "July");
4066         monthnames[7] = C_("Complete month name for use by strftime", "August");
4067         monthnames[8] = C_("Complete month name for use by strftime", "September");
4068         monthnames[9] = C_("Complete month name for use by strftime", "October");
4069         monthnames[10] = C_("Complete month name for use by strftime", "November");
4070         monthnames[11] = C_("Complete month name for use by strftime", "December");
4071
4072         s_daynames[0] = C_("Abbr. day name for use by strftime", "Sun");
4073         s_daynames[1] = C_("Abbr. day name for use by strftime", "Mon");
4074         s_daynames[2] = C_("Abbr. day name for use by strftime", "Tue");
4075         s_daynames[3] = C_("Abbr. day name for use by strftime", "Wed");
4076         s_daynames[4] = C_("Abbr. day name for use by strftime", "Thu");
4077         s_daynames[5] = C_("Abbr. day name for use by strftime", "Fri");
4078         s_daynames[6] = C_("Abbr. day name for use by strftime", "Sat");
4079
4080         s_monthnames[0] = C_("Abbr. month name for use by strftime", "Jan");
4081         s_monthnames[1] = C_("Abbr. month name for use by strftime", "Feb");
4082         s_monthnames[2] = C_("Abbr. month name for use by strftime", "Mar");
4083         s_monthnames[3] = C_("Abbr. month name for use by strftime", "Apr");
4084         s_monthnames[4] = C_("Abbr. month name for use by strftime", "May");
4085         s_monthnames[5] = C_("Abbr. month name for use by strftime", "Jun");
4086         s_monthnames[6] = C_("Abbr. month name for use by strftime", "Jul");
4087         s_monthnames[7] = C_("Abbr. month name for use by strftime", "Aug");
4088         s_monthnames[8] = C_("Abbr. month name for use by strftime", "Sep");
4089         s_monthnames[9] = C_("Abbr. month name for use by strftime", "Oct");
4090         s_monthnames[10] = C_("Abbr. month name for use by strftime", "Nov");
4091         s_monthnames[11] = C_("Abbr. month name for use by strftime", "Dec");
4092
4093         for (i = 0; i < 7; i++) {
4094                 daynames_len[i] = strlen(daynames[i]);
4095                 s_daynames_len[i] = strlen(s_daynames[i]);
4096         }
4097         for (i = 0; i < 12; i++) {
4098                 monthnames_len[i] = strlen(monthnames[i]);
4099                 s_monthnames_len[i] = strlen(s_monthnames[i]);
4100         }
4101
4102         s_am_up = C_("For use by strftime (morning)", "AM");
4103         s_pm_up = C_("For use by strftime (afternoon)", "PM");
4104         s_am_low = C_("For use by strftime (morning, lowercase)", "am");
4105         s_pm_low = C_("For use by strftime (afternoon, lowercase)", "pm");
4106
4107         s_am_up_len = strlen(s_am_up);
4108         s_pm_up_len = strlen(s_pm_up);
4109         s_am_low_len = strlen(s_am_low);
4110         s_pm_low_len = strlen(s_pm_low);
4111
4112         time_names_init_done = TRUE;
4113 }
4114
4115 #define CHECK_SIZE() {                  \
4116         total_done += len;              \
4117         if (total_done >= buflen) {     \
4118                 buf[buflen-1] = '\0';   \
4119                 return 0;               \
4120         }                               \
4121 }
4122
4123 size_t fast_strftime(gchar *buf, gint buflen, const gchar *format, struct tm *lt)
4124 {
4125         gchar *curpos = buf;
4126         gint total_done = 0;
4127         gchar subbuf[64], subfmt[64];
4128         static time_t last_tzset = (time_t)0;
4129
4130         if (!time_names_init_done)
4131                 init_time_names();
4132
4133         if (format == NULL || lt == NULL)
4134                 return 0;
4135
4136         if (last_tzset != time(NULL)) {
4137                 tzset();
4138                 last_tzset = time(NULL);
4139         }
4140         while(*format) {
4141                 if (*format == '%') {
4142                         gint len = 0, tmp = 0;
4143                         format++;
4144                         switch(*format) {
4145                         case '%':
4146                                 len = 1; CHECK_SIZE();
4147                                 *curpos = '%';
4148                                 break;
4149                         case 'a':
4150                                 len = s_daynames_len[lt->tm_wday]; CHECK_SIZE();
4151                                 strncpy2(curpos, s_daynames[lt->tm_wday], buflen - total_done);
4152                                 break;
4153                         case 'A':
4154                                 len = daynames_len[lt->tm_wday]; CHECK_SIZE();
4155                                 strncpy2(curpos, daynames[lt->tm_wday], buflen - total_done);
4156                                 break;
4157                         case 'b':
4158                         case 'h':
4159                                 len = s_monthnames_len[lt->tm_mon]; CHECK_SIZE();
4160                                 strncpy2(curpos, s_monthnames[lt->tm_mon], buflen - total_done);
4161                                 break;
4162                         case 'B':
4163                                 len = monthnames_len[lt->tm_mon]; CHECK_SIZE();
4164                                 strncpy2(curpos, monthnames[lt->tm_mon], buflen - total_done);
4165                                 break;
4166                         case 'c':
4167                                 strftime(subbuf, 64, "%c", lt);
4168                                 len = strlen(subbuf); CHECK_SIZE();
4169                                 strncpy2(curpos, subbuf, buflen - total_done);
4170                                 break;
4171                         case 'C':
4172                                 total_done += 2; CHECK_SIZE();
4173                                 tmp = (lt->tm_year + 1900)/100;
4174                                 *curpos++ = '0'+(tmp / 10);
4175                                 *curpos++ = '0'+(tmp % 10);
4176                                 break;
4177                         case 'd':
4178                                 total_done += 2; CHECK_SIZE();
4179                                 *curpos++ = '0'+(lt->tm_mday / 10);
4180                                 *curpos++ = '0'+(lt->tm_mday % 10);
4181                                 break;
4182                         case 'D':
4183                                 total_done += 8; CHECK_SIZE();
4184                                 *curpos++ = '0'+((lt->tm_mon+1) / 10);
4185                                 *curpos++ = '0'+((lt->tm_mon+1) % 10);
4186                                 *curpos++ = '/';
4187                                 *curpos++ = '0'+(lt->tm_mday / 10);
4188                                 *curpos++ = '0'+(lt->tm_mday % 10);
4189                                 *curpos++ = '/';
4190                                 tmp = lt->tm_year%100;
4191                                 *curpos++ = '0'+(tmp / 10);
4192                                 *curpos++ = '0'+(tmp % 10);
4193                                 break;
4194                         case 'e':
4195                                 len = 2; CHECK_SIZE();
4196                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_mday);
4197                                 break;
4198                         case 'F':
4199                                 len = 10; CHECK_SIZE();
4200                                 snprintf(curpos, buflen - total_done, "%4d-%02d-%02d",
4201                                         lt->tm_year + 1900, lt->tm_mon +1, lt->tm_mday);
4202                                 break;
4203                         case 'H':
4204                                 total_done += 2; CHECK_SIZE();
4205                                 *curpos++ = '0'+(lt->tm_hour / 10);
4206                                 *curpos++ = '0'+(lt->tm_hour % 10);
4207                                 break;
4208                         case 'I':
4209                                 total_done += 2; CHECK_SIZE();
4210                                 tmp = lt->tm_hour;
4211                                 if (tmp > 12)
4212                                         tmp -= 12;
4213                                 else if (tmp == 0)
4214                                         tmp = 12;
4215                                 *curpos++ = '0'+(tmp / 10);
4216                                 *curpos++ = '0'+(tmp % 10);
4217                                 break;
4218                         case 'j':
4219                                 len = 3; CHECK_SIZE();
4220                                 snprintf(curpos, buflen - total_done, "%03d", lt->tm_yday+1);
4221                                 break;
4222                         case 'k':
4223                                 len = 2; CHECK_SIZE();
4224                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_hour);
4225                                 break;
4226                         case 'l':
4227                                 len = 2; CHECK_SIZE();
4228                                 tmp = lt->tm_hour;
4229                                 if (tmp > 12)
4230                                         tmp -= 12;
4231                                 else if (tmp == 0)
4232                                         tmp = 12;
4233                                 snprintf(curpos, buflen - total_done, "%2d", tmp);
4234                                 break;
4235                         case 'm':
4236                                 total_done += 2; CHECK_SIZE();
4237                                 tmp = lt->tm_mon + 1;
4238                                 *curpos++ = '0'+(tmp / 10);
4239                                 *curpos++ = '0'+(tmp % 10);
4240                                 break;
4241                         case 'M':
4242                                 total_done += 2; CHECK_SIZE();
4243                                 *curpos++ = '0'+(lt->tm_min / 10);
4244                                 *curpos++ = '0'+(lt->tm_min % 10);
4245                                 break;
4246                         case 'n':
4247                                 len = 1; CHECK_SIZE();
4248                                 *curpos = '\n';
4249                                 break;
4250                         case 'p':
4251                                 if (lt->tm_hour >= 12) {
4252                                         len = s_pm_up_len; CHECK_SIZE();
4253                                         snprintf(curpos, buflen-total_done, "%s", s_pm_up);
4254                                 } else {
4255                                         len = s_am_up_len; CHECK_SIZE();
4256                                         snprintf(curpos, buflen-total_done, "%s", s_am_up);
4257                                 }
4258                                 break;
4259                         case 'P':
4260                                 if (lt->tm_hour >= 12) {
4261                                         len = s_pm_low_len; CHECK_SIZE();
4262                                         snprintf(curpos, buflen-total_done, "%s", s_pm_low);
4263                                 } else {
4264                                         len = s_am_low_len; CHECK_SIZE();
4265                                         snprintf(curpos, buflen-total_done, "%s", s_am_low);
4266                                 }
4267                                 break;
4268                         case 'r':
4269 #ifdef G_OS_WIN32
4270                                 strftime(subbuf, 64, "%I:%M:%S %p", lt);
4271 #else
4272                                 strftime(subbuf, 64, "%r", lt);
4273 #endif
4274                                 len = strlen(subbuf); CHECK_SIZE();
4275                                 strncpy2(curpos, subbuf, buflen - total_done);
4276                                 break;
4277                         case 'R':
4278                                 total_done += 5; CHECK_SIZE();
4279                                 *curpos++ = '0'+(lt->tm_hour / 10);
4280                                 *curpos++ = '0'+(lt->tm_hour % 10);
4281                                 *curpos++ = ':';
4282                                 *curpos++ = '0'+(lt->tm_min / 10);
4283                                 *curpos++ = '0'+(lt->tm_min % 10);
4284                                 break;
4285                         case 's':
4286                                 snprintf(subbuf, 64, "%lld", (long long)mktime(lt));
4287                                 len = strlen(subbuf); CHECK_SIZE();
4288                                 strncpy2(curpos, subbuf, buflen - total_done);
4289                                 break;
4290                         case 'S':
4291                                 total_done += 2; CHECK_SIZE();
4292                                 *curpos++ = '0'+(lt->tm_sec / 10);
4293                                 *curpos++ = '0'+(lt->tm_sec % 10);
4294                                 break;
4295                         case 't':
4296                                 len = 1; CHECK_SIZE();
4297                                 *curpos = '\t';
4298                                 break;
4299                         case 'T':
4300                                 total_done += 8; CHECK_SIZE();
4301                                 *curpos++ = '0'+(lt->tm_hour / 10);
4302                                 *curpos++ = '0'+(lt->tm_hour % 10);
4303                                 *curpos++ = ':';
4304                                 *curpos++ = '0'+(lt->tm_min / 10);
4305                                 *curpos++ = '0'+(lt->tm_min % 10);
4306                                 *curpos++ = ':';
4307                                 *curpos++ = '0'+(lt->tm_sec / 10);
4308                                 *curpos++ = '0'+(lt->tm_sec % 10);
4309                                 break;
4310                         case 'u':
4311                                 len = 1; CHECK_SIZE();
4312                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday == 0 ? 7: lt->tm_wday);
4313                                 break;
4314                         case 'w':
4315                                 len = 1; CHECK_SIZE();
4316                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday);
4317                                 break;
4318                         case 'x':
4319                                 strftime(subbuf, 64, "%x", lt);
4320                                 len = strlen(subbuf); CHECK_SIZE();
4321                                 strncpy2(curpos, subbuf, buflen - total_done);
4322                                 break;
4323                         case 'X':
4324                                 strftime(subbuf, 64, "%X", lt);
4325                                 len = strlen(subbuf); CHECK_SIZE();
4326                                 strncpy2(curpos, subbuf, buflen - total_done);
4327                                 break;
4328                         case 'y':
4329                                 total_done += 2; CHECK_SIZE();
4330                                 tmp = lt->tm_year%100;
4331                                 *curpos++ = '0'+(tmp / 10);
4332                                 *curpos++ = '0'+(tmp % 10);
4333                                 break;
4334                         case 'Y':
4335                                 len = 4; CHECK_SIZE();
4336                                 snprintf(curpos, buflen - total_done, "%4d", lt->tm_year + 1900);
4337                                 break;
4338                         case 'G':
4339                         case 'g':
4340                         case 'U':
4341                         case 'V':
4342                         case 'W':
4343                         case 'z':
4344                         case 'Z':
4345                         case '+':
4346                                 /* let these complicated ones be done with the libc */
4347                                 snprintf(subfmt, 64, "%%%c", *format);
4348                                 strftime(subbuf, 64, subfmt, lt);
4349                                 len = strlen(subbuf); CHECK_SIZE();
4350                                 strncpy2(curpos, subbuf, buflen - total_done);
4351                                 break;
4352                         case 'E':
4353                         case 'O':
4354                                 /* let these complicated modifiers be done with the libc */
4355                                 snprintf(subfmt, 64, "%%%c%c", *format, *(format+1));
4356                                 strftime(subbuf, 64, subfmt, lt);
4357                                 len = strlen(subbuf); CHECK_SIZE();
4358                                 strncpy2(curpos, subbuf, buflen - total_done);
4359                                 format++;
4360                                 break;
4361                         default:
4362                                 g_warning("format error (%c)", *format);
4363                                 *curpos = '\0';
4364                                 return total_done;
4365                         }
4366                         curpos += len;
4367                         format++;
4368                 } else {
4369                         int len = 1; CHECK_SIZE();
4370                         *curpos++ = *format++;
4371                 }
4372         }
4373         *curpos = '\0';
4374         return total_done;
4375 }
4376
4377 #ifdef G_OS_WIN32
4378 #define WEXITSTATUS(x) (x)
4379 #endif
4380
4381 GMutex *cm_mutex_new(void) {
4382 #if GLIB_CHECK_VERSION(2,32,0)
4383         GMutex *m = g_new0(GMutex, 1);
4384         g_mutex_init(m);
4385         return m;
4386 #else
4387         return g_mutex_new();
4388 #endif
4389 }
4390
4391 void cm_mutex_free(GMutex *mutex) {
4392 #if GLIB_CHECK_VERSION(2,32,0)
4393         g_mutex_clear(mutex);
4394         g_free(mutex);
4395 #else
4396         g_mutex_free(mutex);
4397 #endif
4398 }
4399
4400 static gchar *canonical_list_to_file(GSList *list)
4401 {
4402         GString *result = g_string_new(NULL);
4403         GSList *pathlist = g_slist_reverse(g_slist_copy(list));
4404         GSList *cur;
4405         gchar *str;
4406
4407 #ifndef G_OS_WIN32
4408         result = g_string_append(result, G_DIR_SEPARATOR_S);
4409 #else
4410         if (pathlist->data) {
4411                 const gchar *root = (gchar *)pathlist->data;
4412                 if (root[0] != '\0' && g_ascii_isalpha(root[0]) &&
4413                     root[1] == ':') {
4414                         /* drive - don't prepend dir separator */
4415                 } else {
4416                         result = g_string_append(result, G_DIR_SEPARATOR_S);
4417                 }
4418         }
4419 #endif
4420
4421         for (cur = pathlist; cur; cur = cur->next) {
4422                 result = g_string_append(result, (gchar *)cur->data);
4423                 if (cur->next)
4424                         result = g_string_append(result, G_DIR_SEPARATOR_S);
4425         }
4426         g_slist_free(pathlist);
4427
4428         str = result->str;
4429         g_string_free(result, FALSE);
4430
4431         return str;
4432 }
4433
4434 static GSList *cm_split_path(const gchar *filename, int depth)
4435 {
4436         gchar **path_parts;
4437         GSList *canonical_parts = NULL;
4438         GStatBuf st;
4439         int i;
4440 #ifndef G_OS_WIN32
4441         gboolean follow_symlinks = TRUE;
4442 #endif
4443
4444         if (depth > 32) {
4445 #ifndef G_OS_WIN32
4446                 errno = ELOOP;
4447 #else
4448                 errno = EINVAL; /* can't happen, no symlink handling */
4449 #endif
4450                 return NULL;
4451         }
4452
4453         if (!g_path_is_absolute(filename)) {
4454                 errno =EINVAL;
4455                 return NULL;
4456         }
4457
4458         path_parts = g_strsplit(filename, G_DIR_SEPARATOR_S, -1);
4459
4460         for (i = 0; path_parts[i] != NULL; i++) {
4461                 if (!strcmp(path_parts[i], ""))
4462                         continue;
4463                 if (!strcmp(path_parts[i], "."))
4464                         continue;
4465                 else if (!strcmp(path_parts[i], "..")) {
4466                         if (i == 0) {
4467                                 errno =ENOTDIR;
4468                                 return NULL;
4469                         }
4470                         else /* Remove the last inserted element */
4471                                 canonical_parts =
4472                                         g_slist_delete_link(canonical_parts,
4473                                                             canonical_parts);
4474                 } else {
4475                         gchar *tmp_path;
4476
4477                         canonical_parts = g_slist_prepend(canonical_parts,
4478                                                 g_strdup(path_parts[i]));
4479
4480                         tmp_path = canonical_list_to_file(canonical_parts);
4481
4482                         if(g_stat(tmp_path, &st) < 0) {
4483                                 if (errno == ENOENT) {
4484                                         errno = 0;
4485 #ifndef G_OS_WIN32
4486                                         follow_symlinks = FALSE;
4487 #endif
4488                                 }
4489                                 if (errno != 0) {
4490                                         g_free(tmp_path);
4491                                         slist_free_strings_full(canonical_parts);
4492                                         g_strfreev(path_parts);
4493
4494                                         return NULL;
4495                                 }
4496                         }
4497 #ifndef G_OS_WIN32
4498                         if (follow_symlinks && g_file_test(tmp_path, G_FILE_TEST_IS_SYMLINK)) {
4499                                 GError *error = NULL;
4500                                 gchar *target = g_file_read_link(tmp_path, &error);
4501
4502                                 if (!g_path_is_absolute(target)) {
4503                                         /* remove the last inserted element */
4504                                         canonical_parts =
4505                                                 g_slist_delete_link(canonical_parts,
4506                                                             canonical_parts);
4507                                         /* add the target */
4508                                         canonical_parts = g_slist_prepend(canonical_parts,
4509                                                 g_strdup(target));
4510                                         g_free(target);
4511
4512                                         /* and get the new target */
4513                                         target = canonical_list_to_file(canonical_parts);
4514                                 }
4515
4516                                 /* restart from absolute target */
4517                                 slist_free_strings_full(canonical_parts);
4518                                 canonical_parts = NULL;
4519                                 if (!error)
4520                                         canonical_parts = cm_split_path(target, depth + 1);
4521                                 else
4522                                         g_error_free(error);
4523                                 if (canonical_parts == NULL) {
4524                                         g_free(tmp_path);
4525                                         g_strfreev(path_parts);
4526                                         return NULL;
4527                                 }
4528                                 g_free(target);
4529                         }
4530 #endif
4531                         g_free(tmp_path);
4532                 }
4533         }
4534         g_strfreev(path_parts);
4535         return canonical_parts;
4536 }
4537
4538 /*
4539  * Canonicalize a filename, resolving symlinks along the way.
4540  * Returns a negative errno in case of error.
4541  */
4542 int cm_canonicalize_filename(const gchar *filename, gchar **canonical_name) {
4543         GSList *canonical_parts;
4544         gboolean is_absolute;
4545
4546         if (filename == NULL)
4547                 return -EINVAL;
4548         if (canonical_name == NULL)
4549                 return -EINVAL;
4550         *canonical_name = NULL;
4551
4552         is_absolute = g_path_is_absolute(filename);
4553         if (!is_absolute) {
4554                 /* Always work on absolute filenames. */
4555                 gchar *cur = g_get_current_dir();
4556                 gchar *absolute_filename = g_strconcat(cur, G_DIR_SEPARATOR_S,
4557                                                        filename, NULL);
4558
4559                 canonical_parts = cm_split_path(absolute_filename, 0);
4560                 g_free(absolute_filename);
4561                 g_free(cur);
4562         } else
4563                 canonical_parts = cm_split_path(filename, 0);
4564
4565         if (canonical_parts == NULL)
4566                 return -errno;
4567
4568         *canonical_name = canonical_list_to_file(canonical_parts);
4569         slist_free_strings_full(canonical_parts);
4570         return 0;
4571 }
4572
4573 /* Returns a decoded base64 string, guaranteed to be null-terminated. */
4574 guchar *g_base64_decode_zero(const gchar *text, gsize *out_len)
4575 {
4576         gchar *tmp = g_base64_decode(text, out_len);
4577         gchar *out = g_strndup(tmp, *out_len);
4578
4579         g_free(tmp);
4580
4581         if (strlen(out) != *out_len) {
4582                 g_warning ("strlen(out) %"G_GSIZE_FORMAT" != *out_len %"G_GSIZE_FORMAT, strlen(out), *out_len);
4583         }
4584
4585         return out;
4586 }
4587
4588 #if !GLIB_CHECK_VERSION(2, 30, 0)
4589 /**
4590  * g_utf8_substring:
4591  * @str: a UTF-8 encoded string
4592  * @start_pos: a character offset within @str
4593  * @end_pos: another character offset within @str
4594  *
4595  * Copies a substring out of a UTF-8 encoded string.
4596  * The substring will contain @end_pos - @start_pos
4597  * characters.
4598  *
4599  * Returns: a newly allocated copy of the requested
4600  *     substring. Free with g_free() when no longer needed.
4601  *
4602  * Since: GLIB 2.30
4603  */
4604 gchar *
4605 g_utf8_substring (const gchar *str,
4606                                   glong            start_pos,
4607                                   glong            end_pos)
4608 {
4609   gchar *start, *end, *out;
4610
4611   start = g_utf8_offset_to_pointer (str, start_pos);
4612   end = g_utf8_offset_to_pointer (start, end_pos - start_pos);
4613
4614   out = g_malloc (end - start + 1);
4615   memcpy (out, start, end - start);
4616   out[end - start] = 0;
4617
4618   return out;
4619 }
4620 #endif
4621
4622 /* Attempts to read count bytes from a PRNG into memory area starting at buf.
4623  * It is up to the caller to make sure there is at least count bytes
4624  * available at buf. */
4625 gboolean
4626 get_random_bytes(void *buf, size_t count)
4627 {
4628         /* Open our prng source. */
4629 #if defined G_OS_WIN32
4630         HCRYPTPROV rnd;
4631
4632         if (!CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, 0) &&
4633                         !CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
4634                 debug_print("Could not acquire a CSP handle.\n");
4635                 return FALSE;
4636         }
4637 #else
4638         int rnd;
4639         ssize_t ret;
4640
4641         rnd = open("/dev/urandom", O_RDONLY);
4642         if (rnd == -1) {
4643                 FILE_OP_ERROR("/dev/urandom", "open");
4644                 debug_print("Could not open /dev/urandom.\n");
4645                 return FALSE;
4646         }
4647 #endif
4648
4649         /* Read data from the source into buf. */
4650 #if defined G_OS_WIN32
4651         if (!CryptGenRandom(rnd, count, buf)) {
4652                 debug_print("Could not read %"G_GSIZE_FORMAT" random bytes.\n", count);
4653                 CryptReleaseContext(rnd, 0);
4654                 return FALSE;
4655         }
4656 #else
4657         ret = read(rnd, buf, count);
4658         if (ret != count) {
4659                 FILE_OP_ERROR("/dev/urandom", "read");
4660                 debug_print("Could not read enough data from /dev/urandom, read only %ld of %lu bytes.\n", ret, count);
4661                 close(rnd);
4662                 return FALSE;
4663         }
4664 #endif
4665
4666         /* Close the prng source. */
4667 #if defined G_OS_WIN32
4668         CryptReleaseContext(rnd, 0);
4669 #else
4670         close(rnd);
4671 #endif
4672
4673         return TRUE;
4674 }
4675
4676 /* returns FALSE if parsing failed, otherwise returns TRUE and sets *server, *port
4677    and eventually *fp from filename (if not NULL, they must be free'd by caller after
4678    user.
4679    filenames we expect: 'host.name.port.cert' or 'host.name.port.f:i:n:g:e:r:p:r:i:n:t.cert' */
4680 gboolean get_serverportfp_from_filename(const gchar *str, gchar **server, gchar **port, gchar **fp)
4681 {
4682         const gchar *pos, *dotport_pos = NULL, *dotcert_pos = NULL, *dotfp_pos = NULL;
4683
4684         g_return_val_if_fail(str != NULL, FALSE);
4685
4686         pos = str + strlen(str) - 1;
4687         while ((pos > str) && !dotport_pos) {
4688                 if (*pos == '.') {
4689                         if (!dotcert_pos) {
4690                                 /* match the .cert suffix */
4691                                 if (strcmp(pos, ".cert") == 0) {
4692                                         dotcert_pos = pos;
4693                                 }
4694                         } else {
4695                                 if (!dotfp_pos) {
4696                                         /* match an eventual fingerprint */
4697                                         /* or the port number */
4698                                         if (strncmp(pos + 3, ":", 1) == 0) {
4699                                                 dotfp_pos = pos;
4700                                         } else {
4701                                                 dotport_pos = pos;
4702                                         }
4703                                 } else {
4704                                         /* match the port number */
4705                                         dotport_pos = pos;
4706                                 }
4707                         }
4708                 }
4709                 pos--;
4710         }
4711         if (!dotport_pos || !dotcert_pos) {
4712                 g_warning("could not parse filename %s", str);
4713                 return FALSE;
4714         }
4715
4716         if (server != NULL)
4717                 *server = g_strndup(str, dotport_pos - str);
4718         if (dotfp_pos) {
4719                 if (port != NULL)
4720                         *port = g_strndup(dotport_pos + 1, dotfp_pos - dotport_pos - 1);
4721                 if (fp != NULL)
4722                         *fp = g_strndup(dotfp_pos + 1, dotcert_pos - dotfp_pos - 1);
4723         } else {
4724                 if (port != NULL)
4725                         *port = g_strndup(dotport_pos + 1, dotcert_pos - dotport_pos - 1);
4726                 if (fp != NULL)
4727                         *fp = NULL;
4728         }
4729
4730         debug_print("filename='%s' => server='%s' port='%s' fp='%s'\n",
4731                         str,
4732                         (server ? *server : "(n/a)"),
4733                         (port ? *port : "(n/a)"),
4734                         (fp ? *fp : "(n/a)"));
4735
4736         if (!(server && *server) || !(port && *port))
4737                 return FALSE;
4738         else
4739                 return TRUE;
4740 }
4741
4742 #ifdef G_OS_WIN32
4743 gchar *win32_debug_log_path(void)
4744 {
4745         return g_strconcat(g_get_tmp_dir(), G_DIR_SEPARATOR_S,
4746                         "claws-win32.log", NULL);
4747 }
4748 #endif