src/common/utils.c

   1 /*
   2  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2021 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 #endif
  84
  85 #include "utils.h"
  86 #include "socket.h"
  87 #include "codeconv.h"
  88 #include "tlds.h"
  89 #include "timing.h"
  90 #include "file-utils.h"
  91
  92 #define BUFFSIZE        8192
  93
  94 static gboolean debug_mode = FALSE;
  95
  96 void list_free_strings_full(GList *list)
  97 {
  98         g_list_free_full(list, (GDestroyNotify)g_free);
  99 }
 100
 101 void slist_free_strings_full(GSList *list)
 102 {
 103         g_slist_free_full(list, (GDestroyNotify)g_free);
 104 }
 105
 106 static void hash_free_strings_func(gpointer key, gpointer value, gpointer data)
 107 {
 108         g_free(key);
 109 }
 110
 111 void hash_free_strings(GHashTable *table)
 112 {
 113         g_hash_table_foreach(table, hash_free_strings_func, NULL);
 114 }
 115
 116 gint str_case_equal(gconstpointer v, gconstpointer v2)
 117 {
 118         return g_ascii_strcasecmp((const gchar *)v, (const gchar *)v2) == 0;
 119 }
 120
 121 guint str_case_hash(gconstpointer key)
 122 {
 123         const gchar *p = key;
 124         guint h = *p;
 125
 126         if (h) {
 127                 h = g_ascii_tolower(h);
 128                 for (p += 1; *p != '\0'; p++)
 129                         h = (h << 5) - h + g_ascii_tolower(*p);
 130         }
 131
 132         return h;
 133 }
 134
 135 gint to_number(const gchar *nstr)
 136 {
 137         register const gchar *p;
 138
 139         if (*nstr == '\0') return -1;
 140
 141         for (p = nstr; *p != '\0'; p++)
 142                 if (!g_ascii_isdigit(*p)) return -1;
 143
 144         return atoi(nstr);
 145 }
 146
 147 /* convert integer into string,
 148    nstr must be not lower than 11 characters length */
 149 gchar *itos_buf(gchar *nstr, gint n)
 150 {
 151         g_snprintf(nstr, 11, "%d", n);
 152         return nstr;
 153 }
 154
 155 /* convert integer into string */
 156 gchar *itos(gint n)
 157 {
 158         static gchar nstr[11];
 159
 160         return itos_buf(nstr, n);
 161 }
 162
 163 #define divide(num,divisor,i,d)         \
 164 {                                       \
 165         i = num >> divisor;             \
 166         d = num & ((1<<divisor)-1);     \
 167         d = (d*100) >> divisor;         \
 168 }
 169
 170
 171 /*!
 172  * \brief Convert a given size in bytes in a human-readable string
 173  *
 174  * \param size  The size expressed in bytes to convert in string
 175  * \return      The string that respresents the size in an human-readable way
 176  */
 177 gchar *to_human_readable(goffset size)
 178 {
 179         static gchar str[14];
 180         static gchar *b_format = NULL, *kb_format = NULL,
 181                      *mb_format = NULL, *gb_format = NULL;
 182         register int t = 0, r = 0;
 183         if (b_format == NULL) {
 184                 b_format  = _("%dB");
 185                 kb_format = _("%d.%02dKiB");
 186                 mb_format = _("%d.%02dMiB");
 187                 gb_format = _("%.2fGiB");
 188         }
 189
 190         if (size < (goffset)1024) {
 191                 g_snprintf(str, sizeof(str), b_format, (gint)size);
 192                 return str;
 193         } else if (size >> 10 < (goffset)1024) {
 194                 divide(size, 10, t, r);
 195                 g_snprintf(str, sizeof(str), kb_format, t, r);
 196                 return str;
 197         } else if (size >> 20 < (goffset)1024) {
 198                 divide(size, 20, t, r);
 199                 g_snprintf(str, sizeof(str), mb_format, t, r);
 200                 return str;
 201         } else {
 202                 g_snprintf(str, sizeof(str), gb_format, (gfloat)(size >> 30));
 203                 return str;
 204         }
 205 }
 206
 207 /* compare paths */
 208 gint path_cmp(const gchar *s1, const gchar *s2)
 209 {
 210         gint len1, len2;
 211         int rc;
 212 #ifdef G_OS_WIN32
 213         gchar *s1buf, *s2buf;
 214 #endif
 215
 216         if (s1 == NULL || s2 == NULL) return -1;
 217         if (*s1 == '\0' || *s2 == '\0') return -1;
 218
 219 #ifdef G_OS_WIN32
 220         s1buf = g_strdup (s1);
 221         s2buf = g_strdup (s2);
 222         subst_char (s1buf, '/', G_DIR_SEPARATOR);
 223         subst_char (s2buf, '/', G_DIR_SEPARATOR);
 224         s1 = s1buf;
 225         s2 = s2buf;
 226 #endif /* !G_OS_WIN32 */
 227
 228         len1 = strlen(s1);
 229         len2 = strlen(s2);
 230
 231         if (s1[len1 - 1] == G_DIR_SEPARATOR) len1--;
 232         if (s2[len2 - 1] == G_DIR_SEPARATOR) len2--;
 233
 234         rc = strncmp(s1, s2, MAX(len1, len2));
 235 #ifdef G_OS_WIN32
 236         g_free (s1buf);
 237         g_free (s2buf);
 238 #endif /* !G_OS_WIN32 */
 239         return rc;
 240 }
 241
 242 /* remove trailing return code */
 243 gchar *strretchomp(gchar *str)
 244 {
 245         register gchar *s;
 246
 247         if (!*str) return str;
 248
 249         for (s = str + strlen(str) - 1;
 250              s >= str && (*s == '\n' || *s == '\r');
 251              s--)
 252                 *s = '\0';
 253
 254         return str;
 255 }
 256
 257 /* remove trailing character */
 258 gchar *strtailchomp(gchar *str, gchar tail_char)
 259 {
 260         register gchar *s;
 261
 262         if (!*str) return str;
 263         if (tail_char == '\0') return str;
 264
 265         for (s = str + strlen(str) - 1; s >= str && *s == tail_char; s--)
 266                 *s = '\0';
 267
 268         return str;
 269 }
 270
 271 /* remove CR (carriage return) */
 272 gchar *strcrchomp(gchar *str)
 273 {
 274         register gchar *s;
 275
 276         if (!*str) return str;
 277
 278         s = str + strlen(str) - 1;
 279         if (*s == '\n' && s > str && *(s - 1) == '\r') {
 280                 *(s - 1) = '\n';
 281                 *s = '\0';
 282         }
 283
 284         return str;
 285 }
 286
 287 /* truncates string at first CR (carriage return) or LF (line feed) */
 288 gchar *strcrlftrunc(gchar *str)
 289 {
 290         gchar *p = NULL;
 291
 292         if ((str == NULL) || (!*str)) return str;
 293
 294         if ((p = strstr(str, "\r")) != NULL)
 295                 *p = '\0';
 296         if ((p = strstr(str, "\n")) != NULL)
 297                 *p = '\0';
 298
 299         return str;
 300 }
 301
 302 #ifndef HAVE_STRCASESTR
 303 /* Similar to `strstr' but this function ignores the case of both strings.  */
 304 gchar *strcasestr(const gchar *haystack, const gchar *needle)
 305 {
 306         size_t haystack_len = strlen(haystack);
 307
 308         return strncasestr(haystack, haystack_len, needle);
 309 }
 310 #endif /* HAVE_STRCASESTR */
 311
 312 gchar *strncasestr(const gchar *haystack, gint haystack_len, const gchar *needle)
 313 {
 314         register size_t needle_len;
 315
 316         needle_len   = strlen(needle);
 317
 318         if (haystack_len < needle_len || needle_len == 0)
 319                 return NULL;
 320
 321         while (haystack_len >= needle_len) {
 322                 if (!g_ascii_strncasecmp(haystack, needle, needle_len))
 323                         return (gchar *)haystack;
 324                 else {
 325                         haystack++;
 326                         haystack_len--;
 327                 }
 328         }
 329
 330         return NULL;
 331 }
 332
 333 gpointer my_memmem(gconstpointer haystack, size_t haystacklen,
 334                    gconstpointer needle, size_t needlelen)
 335 {
 336         const gchar *haystack_ = (const gchar *)haystack;
 337         const gchar *needle_ = (const gchar *)needle;
 338         const gchar *haystack_cur = (const gchar *)haystack;
 339         size_t haystack_left = haystacklen;
 340
 341         if (needlelen == 1)
 342                 return memchr(haystack_, *needle_, haystacklen);
 343
 344         while ((haystack_cur = memchr(haystack_cur, *needle_, haystack_left))
 345                != NULL) {
 346                 if (haystacklen - (haystack_cur - haystack_) < needlelen)
 347                         break;
 348                 if (memcmp(haystack_cur + 1, needle_ + 1, needlelen - 1) == 0)
 349                         return (gpointer)haystack_cur;
 350                 else{
 351                         haystack_cur++;
 352                         haystack_left = haystacklen - (haystack_cur - haystack_);
 353                 }
 354         }
 355
 356         return NULL;
 357 }
 358
 359 /* Copy no more than N characters of SRC to DEST, with NULL terminating.  */
 360 gchar *strncpy2(gchar *dest, const gchar *src, size_t n)
 361 {
 362         register const gchar *s = src;
 363         register gchar *d = dest;
 364
 365         while (--n && *s)
 366                 *d++ = *s++;
 367         *d = '\0';
 368
 369         return dest;
 370 }
 371
 372
 373 /* Examine if next block is non-ASCII string */
 374 gboolean is_next_nonascii(const gchar *s)
 375 {
 376         const gchar *p;
 377
 378         /* skip head space */
 379         for (p = s; *p != '\0' && g_ascii_isspace(*p); p++)
 380                 ;
 381         for (; *p != '\0' && !g_ascii_isspace(*p); p++) {
 382                 if (*(guchar *)p > 127 || *(guchar *)p < 32)
 383                         return TRUE;
 384         }
 385
 386         return FALSE;
 387 }
 388
 389 gint get_next_word_len(const gchar *s)
 390 {
 391         gint len = 0;
 392
 393         for (; *s != '\0' && !g_ascii_isspace(*s); s++, len++)
 394                 ;
 395
 396         return len;
 397 }
 398
 399 static void trim_subject_for_compare(gchar *str)
 400 {
 401         gchar *srcp;
 402
 403         eliminate_parenthesis(str, '[', ']');
 404         eliminate_parenthesis(str, '(', ')');
 405         g_strstrip(str);
 406
 407         srcp = str + subject_get_prefix_length(str);
 408         if (srcp != str)
 409                 memmove(str, srcp, strlen(srcp) + 1);
 410 }
 411
 412 static void trim_subject_for_sort(gchar *str)
 413 {
 414         gchar *srcp;
 415
 416         g_strstrip(str);
 417
 418         srcp = str + subject_get_prefix_length(str);
 419         if (srcp != str)
 420                 memmove(str, srcp, strlen(srcp) + 1);
 421 }
 422
 423 /* compare subjects */
 424 gint subject_compare(const gchar *s1, const gchar *s2)
 425 {
 426         gchar *str1, *str2;
 427
 428         if (!s1 || !s2) return -1;
 429         if (!*s1 || !*s2) return -1;
 430
 431         Xstrdup_a(str1, s1, return -1);
 432         Xstrdup_a(str2, s2, return -1);
 433
 434         trim_subject_for_compare(str1);
 435         trim_subject_for_compare(str2);
 436
 437         if (!*str1 || !*str2) return -1;
 438
 439         return strcmp(str1, str2);
 440 }
 441
 442 gint subject_compare_for_sort(const gchar *s1, const gchar *s2)
 443 {
 444         gchar *str1, *str2;
 445
 446         if (!s1 || !s2) return -1;
 447
 448         Xstrdup_a(str1, s1, return -1);
 449         Xstrdup_a(str2, s2, return -1);
 450
 451         trim_subject_for_sort(str1);
 452         trim_subject_for_sort(str2);
 453
 454         if (!g_utf8_validate(str1, -1, NULL)) {
 455                 g_warning("message subject \"%s\" failed UTF-8 validation", str1);
 456                 return 0;
 457         } else if (!g_utf8_validate(str2, -1, NULL)) {
 458                 g_warning("message subject \"%s\" failed UTF-8 validation", str2);
 459                 return 0;
 460         }
 461
 462         return g_utf8_collate(str1, str2);
 463 }
 464
 465 void trim_subject(gchar *str)
 466 {
 467         register gchar *srcp;
 468         gchar op, cl;
 469         gint in_brace;
 470
 471         g_strstrip(str);
 472
 473         srcp = str + subject_get_prefix_length(str);
 474
 475         if (*srcp == '[') {
 476                 op = '[';
 477                 cl = ']';
 478         } else if (*srcp == '(') {
 479                 op = '(';
 480                 cl = ')';
 481         } else
 482                 op = 0;
 483
 484         if (op) {
 485                 ++srcp;
 486                 in_brace = 1;
 487                 while (*srcp) {
 488                         if (*srcp == op)
 489                                 in_brace++;
 490                         else if (*srcp == cl)
 491                                 in_brace--;
 492                         srcp++;
 493                         if (in_brace == 0)
 494                                 break;
 495                 }
 496         }
 497         while (g_ascii_isspace(*srcp)) srcp++;
 498         memmove(str, srcp, strlen(srcp) + 1);
 499 }
 500
 501 void eliminate_parenthesis(gchar *str, gchar op, gchar cl)
 502 {
 503         register gchar *srcp, *destp;
 504         gint in_brace;
 505
 506         destp = str;
 507
 508         while ((destp = strchr(destp, op))) {
 509                 in_brace = 1;
 510                 srcp = destp + 1;
 511                 while (*srcp) {
 512                         if (*srcp == op)
 513                                 in_brace++;
 514                         else if (*srcp == cl)
 515                                 in_brace--;
 516                         srcp++;
 517                         if (in_brace == 0)
 518                                 break;
 519                 }
 520                 while (g_ascii_isspace(*srcp)) srcp++;
 521                 memmove(destp, srcp, strlen(srcp) + 1);
 522         }
 523 }
 524
 525 void extract_parenthesis(gchar *str, gchar op, gchar cl)
 526 {
 527         register gchar *srcp, *destp;
 528         gint in_brace;
 529
 530         destp = str;
 531
 532         while ((srcp = strchr(destp, op))) {
 533                 if (destp > str)
 534                         *destp++ = ' ';
 535                 memmove(destp, srcp + 1, strlen(srcp));
 536                 in_brace = 1;
 537                 while(*destp) {
 538                         if (*destp == op)
 539                                 in_brace++;
 540                         else if (*destp == cl)
 541                                 in_brace--;
 542
 543                         if (in_brace == 0)
 544                                 break;
 545
 546                         destp++;
 547                 }
 548         }
 549         *destp = '\0';
 550 }
 551
 552 static void extract_parenthesis_with_skip_quote(gchar *str, gchar quote_chr,
 553                                          gchar op, gchar cl)
 554 {
 555         register gchar *srcp, *destp;
 556         gint in_brace;
 557         gboolean in_quote = FALSE;
 558
 559         destp = str;
 560
 561         while ((srcp = strchr_with_skip_quote(destp, quote_chr, op))) {
 562                 if (destp > str)
 563                         *destp++ = ' ';
 564                 memmove(destp, srcp + 1, strlen(srcp));
 565                 in_brace = 1;
 566                 while(*destp) {
 567                         if (*destp == op && !in_quote)
 568                                 in_brace++;
 569                         else if (*destp == cl && !in_quote)
 570                                 in_brace--;
 571                         else if (*destp == quote_chr)
 572                                 in_quote ^= TRUE;
 573
 574                         if (in_brace == 0)
 575                                 break;
 576
 577                         destp++;
 578                 }
 579         }
 580         *destp = '\0';
 581 }
 582
 583 void extract_quote(gchar *str, gchar quote_chr)
 584 {
 585         register gchar *p;
 586
 587         if ((str = strchr(str, quote_chr))) {
 588                 p = str;
 589                 while ((p = strchr(p + 1, quote_chr)) && (p[-1] == '\\')) {
 590                         memmove(p - 1, p, strlen(p) + 1);
 591                         p--;
 592                 }
 593                 if(p) {
 594                         *p = '\0';
 595                         memmove(str, str + 1, p - str);
 596                 }
 597         }
 598 }
 599
 600 /* Returns a newly allocated string with all quote_chr not at the beginning
 601    or the end of str escaped with '\' or the given str if not required. */
 602 gchar *escape_internal_quotes(gchar *str, gchar quote_chr)
 603 {
 604         register gchar *p, *q;
 605         gchar *qstr;
 606         int k = 0, l = 0;
 607
 608         if (str == NULL || *str == '\0')
 609                 return str;
 610
 611         /* search for unescaped quote_chr */
 612         p = str;
 613         if (*p == quote_chr)
 614                 ++p, ++l;
 615         while (*p) {
 616                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 617                         ++k;
 618                 ++p, ++l;
 619         }
 620         if (!k) /* nothing to escape */
 621                 return str;
 622
 623         /* unescaped quote_chr found */
 624         qstr = g_malloc(l + k + 1);
 625         p = str;
 626         q = qstr;
 627         if (*p == quote_chr) {
 628                 *q = quote_chr;
 629                 ++p, ++q;
 630         }
 631         while (*p) {
 632                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 633                         *q++ = '\\';
 634                 *q++ = *p++;
 635         }
 636         *q = '\0';
 637
 638         return qstr;
 639 }
 640
 641 void eliminate_address_comment(gchar *str)
 642 {
 643         register gchar *srcp, *destp;
 644         gint in_brace;
 645
 646         destp = str;
 647
 648         while ((destp = strchr(destp, '"'))) {
 649                 if ((srcp = strchr(destp + 1, '"'))) {
 650                         srcp++;
 651                         if (*srcp == '@') {
 652                                 destp = srcp + 1;
 653                         } else {
 654                                 while (g_ascii_isspace(*srcp)) srcp++;
 655                                 memmove(destp, srcp, strlen(srcp) + 1);
 656                         }
 657                 } else {
 658                         *destp = '\0';
 659                         break;
 660                 }
 661         }
 662
 663         destp = str;
 664
 665         while ((destp = strchr_with_skip_quote(destp, '"', '('))) {
 666                 in_brace = 1;
 667                 srcp = destp + 1;
 668                 while (*srcp) {
 669                         if (*srcp == '(')
 670                                 in_brace++;
 671                         else if (*srcp == ')')
 672                                 in_brace--;
 673                         srcp++;
 674                         if (in_brace == 0)
 675                                 break;
 676                 }
 677                 while (g_ascii_isspace(*srcp)) srcp++;
 678                 memmove(destp, srcp, strlen(srcp) + 1);
 679         }
 680 }
 681
 682 gchar *strchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
 683 {
 684         gboolean in_quote = FALSE;
 685
 686         while (*str) {
 687                 if (*str == c && !in_quote)
 688                         return (gchar *)str;
 689                 if (*str == quote_chr)
 690                         in_quote ^= TRUE;
 691                 str++;
 692         }
 693
 694         return NULL;
 695 }
 696
 697 void extract_address(gchar *str)
 698 {
 699         cm_return_if_fail(str != NULL);
 700         eliminate_address_comment(str);
 701         if (strchr_with_skip_quote(str, '"', '<'))
 702                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 703         g_strstrip(str);
 704 }
 705
 706 void extract_list_id_str(gchar *str)
 707 {
 708         if (strchr_with_skip_quote(str, '"', '<'))
 709                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 710         g_strstrip(str);
 711 }
 712
 713 static GSList *address_list_append_real(GSList *addr_list, const gchar *str, gboolean removecomments)
 714 {
 715         gchar *work;
 716         gchar *workp;
 717
 718         if (!str) return addr_list;
 719
 720         Xstrdup_a(work, str, return addr_list);
 721
 722         if (removecomments)
 723                 eliminate_address_comment(work);
 724         workp = work;
 725
 726         while (workp && *workp) {
 727                 gchar *p, *next;
 728
 729                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 730                         *p = '\0';
 731                         next = p + 1;
 732                 } else
 733                         next = NULL;
 734
 735                 if (removecomments && strchr_with_skip_quote(workp, '"', '<'))
 736                         extract_parenthesis_with_skip_quote
 737                                 (workp, '"', '<', '>');
 738
 739                 g_strstrip(workp);
 740                 if (*workp)
 741                         addr_list = g_slist_append(addr_list, g_strdup(workp));
 742
 743                 workp = next;
 744         }
 745
 746         return addr_list;
 747 }
 748
 749 GSList *address_list_append(GSList *addr_list, const gchar *str)
 750 {
 751         return address_list_append_real(addr_list, str, TRUE);
 752 }
 753
 754 GSList *address_list_append_with_comments(GSList *addr_list, const gchar *str)
 755 {
 756         return address_list_append_real(addr_list, str, FALSE);
 757 }
 758
 759 GSList *references_list_prepend(GSList *msgid_list, const gchar *str)
 760 {
 761         const gchar *strp;
 762
 763         if (!str) return msgid_list;
 764         strp = str;
 765
 766         while (strp && *strp) {
 767                 const gchar *start, *end;
 768                 gchar *msgid;
 769
 770                 if ((start = strchr(strp, '<')) != NULL) {
 771                         end = strchr(start + 1, '>');
 772                         if (!end) break;
 773                 } else
 774                         break;
 775
 776                 msgid = g_strndup(start + 1, end - start - 1);
 777                 g_strstrip(msgid);
 778                 if (*msgid)
 779                         msgid_list = g_slist_prepend(msgid_list, msgid);
 780                 else
 781                         g_free(msgid);
 782
 783                 strp = end + 1;
 784         }
 785
 786         return msgid_list;
 787 }
 788
 789 GSList *references_list_append(GSList *msgid_list, const gchar *str)
 790 {
 791         GSList *list;
 792
 793         list = references_list_prepend(NULL, str);
 794         list = g_slist_reverse(list);
 795         msgid_list = g_slist_concat(msgid_list, list);
 796
 797         return msgid_list;
 798 }
 799
 800 GSList *newsgroup_list_append(GSList *group_list, const gchar *str)
 801 {
 802         gchar *work;
 803         gchar *workp;
 804
 805         if (!str) return group_list;
 806
 807         Xstrdup_a(work, str, return group_list);
 808
 809         workp = work;
 810
 811         while (workp && *workp) {
 812                 gchar *p, *next;
 813
 814                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 815                         *p = '\0';
 816                         next = p + 1;
 817                 } else
 818                         next = NULL;
 819
 820                 g_strstrip(workp);
 821                 if (*workp)
 822                         group_list = g_slist_append(group_list,
 823                                                     g_strdup(workp));
 824
 825                 workp = next;
 826         }
 827
 828         return group_list;
 829 }
 830
 831 GList *add_history(GList *list, const gchar *str)
 832 {
 833         GList *old;
 834         gchar *oldstr;
 835
 836         cm_return_val_if_fail(str != NULL, list);
 837
 838         old = g_list_find_custom(list, (gpointer)str, (GCompareFunc)g_strcmp0);
 839         if (old) {
 840                 oldstr = old->data;
 841                 list = g_list_remove(list, old->data);
 842                 g_free(oldstr);
 843         } else if (g_list_length(list) >= MAX_HISTORY_SIZE) {
 844                 GList *last;
 845
 846                 last = g_list_last(list);
 847                 if (last) {
 848                         oldstr = last->data;
 849                         list = g_list_remove(list, last->data);
 850                         g_free(oldstr);
 851                 }
 852         }
 853
 854         list = g_list_prepend(list, g_strdup(str));
 855
 856         return list;
 857 }
 858
 859 void remove_return(gchar *str)
 860 {
 861         register gchar *p = str;
 862
 863         while (*p) {
 864                 if (*p == '\n' || *p == '\r')
 865                         memmove(p, p + 1, strlen(p));
 866                 else
 867                         p++;
 868         }
 869 }
 870
 871 void remove_space(gchar *str)
 872 {
 873         register gchar *p = str;
 874         register gint spc;
 875
 876         while (*p) {
 877                 spc = 0;
 878                 while (g_ascii_isspace(*(p + spc)))
 879                         spc++;
 880                 if (spc)
 881                         memmove(p, p + spc, strlen(p + spc) + 1);
 882                 else
 883                         p++;
 884         }
 885 }
 886
 887 void unfold_line(gchar *str)
 888 {
 889         register gchar *ch;
 890         register gunichar c;
 891         register gint len;
 892
 893         ch = str; /* iterator for source string */
 894
 895         while (*ch != 0) {
 896                 c = g_utf8_get_char_validated(ch, -1);
 897
 898                 if (c == (gunichar)-1 || c == (gunichar)-2) {
 899                         /* non-unicode byte, move past it */
 900                         ch++;
 901                         continue;
 902                 }
 903
 904                 len = g_unichar_to_utf8(c, NULL);
 905
 906                 if ((!g_unichar_isdefined(c) || !g_unichar_isprint(c) ||
 907                                 g_unichar_isspace(c)) && c != 173) {
 908                         /* replace anything bad or whitespacey with a single space */
 909                         *ch = ' ';
 910                         ch++;
 911                         if (len > 1) {
 912                                 /* move rest of the string forwards, since we just replaced
 913                                  * a multi-byte sequence with one byte */
 914                                 memmove(ch, ch + len-1, strlen(ch + len-1) + 1);
 915                         }
 916                 } else {
 917                         /* A valid unicode character, copy it. */
 918                         ch += len;
 919                 }
 920         }
 921 }
 922
 923 void subst_char(gchar *str, gchar orig, gchar subst)
 924 {
 925         register gchar *p = str;
 926
 927         while (*p) {
 928                 if (*p == orig)
 929                         *p = subst;
 930                 p++;
 931         }
 932 }
 933
 934 void subst_chars(gchar *str, gchar *orig, gchar subst)
 935 {
 936         register gchar *p = str;
 937
 938         while (*p) {
 939                 if (strchr(orig, *p) != NULL)
 940                         *p = subst;
 941                 p++;
 942         }
 943 }
 944
 945 void subst_for_filename(gchar *str)
 946 {
 947         if (!str)
 948                 return;
 949 #ifdef G_OS_WIN32
 950         subst_chars(str, "\t\r\n\\/*?:", '_');
 951 #else
 952         subst_chars(str, "\t\r\n\\/*", '_');
 953 #endif
 954 }
 955
 956 void subst_for_shellsafe_filename(gchar *str)
 957 {
 958         if (!str)
 959                 return;
 960         subst_for_filename(str);
 961         subst_chars(str, " \"'|&;()<>'!{}[]",'_');
 962 }
 963
 964 gboolean is_ascii_str(const gchar *str)
 965 {
 966         const guchar *p = (const guchar *)str;
 967
 968         while (*p != '\0') {
 969                 if (*p != '\t' && *p != ' ' &&
 970                     *p != '\r' && *p != '\n' &&
 971                     (*p < 32 || *p >= 127))
 972                         return FALSE;
 973                 p++;
 974         }
 975
 976         return TRUE;
 977 }
 978
 979 static const gchar * line_has_quote_char_last(const gchar * str, const gchar *quote_chars)
 980 {
 981         gchar * position = NULL;
 982         gchar * tmp_pos = NULL;
 983         int i;
 984
 985         if (str == NULL || quote_chars == NULL)
 986                 return NULL;
 987
 988         for (i = 0; i < strlen(quote_chars); i++) {
 989                 tmp_pos = strrchr (str, quote_chars[i]);
 990                 if(position == NULL
 991                                 || (tmp_pos != NULL && position <= tmp_pos) )
 992                         position = tmp_pos;
 993         }
 994         return position;
 995 }
 996
 997 gint get_quote_level(const gchar *str, const gchar *quote_chars)
 998 {
 999         const gchar *first_pos;
1000         const gchar *last_pos;
1001         const gchar *p = str;
1002         gint quote_level = -1;
1003
1004         /* speed up line processing by only searching to the last '>' */
1005         if ((first_pos = line_has_quote_char(str, quote_chars)) != NULL) {
1006                 /* skip a line if it contains a '<' before the initial '>' */
1007                 if (memchr(str, '<', first_pos - str) != NULL)
1008                         return -1;
1009                 last_pos = line_has_quote_char_last(first_pos, quote_chars);
1010         } else
1011                 return -1;
1012
1013         while (p <= last_pos) {
1014                 while (p < last_pos) {
1015                         if (g_ascii_isspace(*p))
1016                                 p++;
1017                         else
1018                                 break;
1019                 }
1020
1021                 if (strchr(quote_chars, *p))
1022                         quote_level++;
1023                 else if (*p != '-' && !g_ascii_isspace(*p) && p <= last_pos) {
1024                         /* any characters are allowed except '-','<' and space */
1025                         while (*p != '-' && *p != '<'
1026                                && !strchr(quote_chars, *p)
1027                                && !g_ascii_isspace(*p)
1028                                && p < last_pos)
1029                                 p++;
1030                         if (strchr(quote_chars, *p))
1031                                 quote_level++;
1032                         else
1033                                 break;
1034                 }
1035
1036                 p++;
1037         }
1038
1039         return quote_level;
1040 }
1041
1042 gint check_line_length(const gchar *str, gint max_chars, gint *line)
1043 {
1044         const gchar *p = str, *q;
1045         gint cur_line = 0, len;
1046
1047         while ((q = strchr(p, '\n')) != NULL) {
1048                 len = q - p + 1;
1049                 if (len > max_chars) {
1050                         if (line)
1051                                 *line = cur_line;
1052                         return -1;
1053                 }
1054                 p = q + 1;
1055                 ++cur_line;
1056         }
1057
1058         len = strlen(p);
1059         if (len > max_chars) {
1060                 if (line)
1061                         *line = cur_line;
1062                 return -1;
1063         }
1064
1065         return 0;
1066 }
1067
1068 const gchar * line_has_quote_char(const gchar * str, const gchar *quote_chars)
1069 {
1070         gchar * position = NULL;
1071         gchar * tmp_pos = NULL;
1072         int i;
1073
1074         if (str == NULL || quote_chars == NULL)
1075                 return NULL;
1076
1077         for (i = 0; i < strlen(quote_chars); i++) {
1078                 tmp_pos = strchr (str, quote_chars[i]);
1079                 if(position == NULL
1080                                 || (tmp_pos != NULL && position >= tmp_pos) )
1081                         position = tmp_pos;
1082         }
1083         return position;
1084 }
1085
1086 static gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
1087 {
1088         register guint haystack_len, needle_len;
1089         gboolean in_squote = FALSE, in_dquote = FALSE;
1090
1091         haystack_len = strlen(haystack);
1092         needle_len   = strlen(needle);
1093
1094         if (haystack_len < needle_len || needle_len == 0)
1095                 return NULL;
1096
1097         while (haystack_len >= needle_len) {
1098                 if (!in_squote && !in_dquote &&
1099                     !strncmp(haystack, needle, needle_len))
1100                         return (gchar *)haystack;
1101
1102                 /* 'foo"bar"' -> foo"bar"
1103                    "foo'bar'" -> foo'bar' */
1104                 if (*haystack == '\'') {
1105                         if (in_squote)
1106                                 in_squote = FALSE;
1107                         else if (!in_dquote)
1108                                 in_squote = TRUE;
1109                 } else if (*haystack == '\"') {
1110                         if (in_dquote)
1111                                 in_dquote = FALSE;
1112                         else if (!in_squote)
1113                                 in_dquote = TRUE;
1114                 } else if (*haystack == '\\') {
1115                         haystack++;
1116                         haystack_len--;
1117                 }
1118
1119                 haystack++;
1120                 haystack_len--;
1121         }
1122
1123         return NULL;
1124 }
1125
1126 gchar **strsplit_with_quote(const gchar *str, const gchar *delim,
1127                             gint max_tokens)
1128 {
1129         GSList *string_list = NULL, *slist;
1130         gchar **str_array, *s, *new_str;
1131         guint i, n = 1, len;
1132
1133         cm_return_val_if_fail(str != NULL, NULL);
1134         cm_return_val_if_fail(delim != NULL, NULL);
1135
1136         if (max_tokens < 1)
1137                 max_tokens = G_MAXINT;
1138
1139         s = strstr_with_skip_quote(str, delim);
1140         if (s) {
1141                 guint delimiter_len = strlen(delim);
1142
1143                 do {
1144                         len = s - str;
1145                         new_str = g_strndup(str, len);
1146
1147                         if (new_str[0] == '\'' || new_str[0] == '\"') {
1148                                 if (new_str[len - 1] == new_str[0]) {
1149                                         new_str[len - 1] = '\0';
1150                                         memmove(new_str, new_str + 1, len - 1);
1151                                 }
1152                         }
1153                         string_list = g_slist_prepend(string_list, new_str);
1154                         n++;
1155                         str = s + delimiter_len;
1156                         s = strstr_with_skip_quote(str, delim);
1157                 } while (--max_tokens && s);
1158         }
1159
1160         if (*str) {
1161                 new_str = g_strdup(str);
1162                 if (new_str[0] == '\'' || new_str[0] == '\"') {
1163                         len = strlen(str);
1164                         if (new_str[len - 1] == new_str[0]) {
1165                                 new_str[len - 1] = '\0';
1166                                 memmove(new_str, new_str + 1, len - 1);
1167                         }
1168                 }
1169                 string_list = g_slist_prepend(string_list, new_str);
1170                 n++;
1171         }
1172
1173         str_array = g_new(gchar*, n);
1174
1175         i = n - 1;
1176
1177         str_array[i--] = NULL;
1178         for (slist = string_list; slist; slist = slist->next)
1179                 str_array[i--] = slist->data;
1180
1181         g_slist_free(string_list);
1182
1183         return str_array;
1184 }
1185
1186 gchar *get_abbrev_newsgroup_name(const gchar *group, gint len)
1187 {
1188         gchar *abbrev_group;
1189         gchar *ap;
1190         const gchar *p = group;
1191         const gchar *last;
1192
1193         cm_return_val_if_fail(group != NULL, NULL);
1194
1195         last = group + strlen(group);
1196         abbrev_group = ap = g_malloc(strlen(group) + 1);
1197
1198         while (*p) {
1199                 while (*p == '.')
1200                         *ap++ = *p++;
1201                 if ((ap - abbrev_group) + (last - p) > len && strchr(p, '.')) {
1202                         *ap++ = *p++;
1203                         while (*p != '.') p++;
1204                 } else {
1205                         strcpy(ap, p);
1206                         return abbrev_group;
1207                 }
1208         }
1209
1210         *ap = '\0';
1211         return abbrev_group;
1212 }
1213
1214 gchar *trim_string(const gchar *str, gint len)
1215 {
1216         const gchar *p = str;
1217         gint mb_len;
1218         gchar *new_str;
1219         gint new_len = 0;
1220
1221         if (!str) return NULL;
1222         if (strlen(str) <= len)
1223                 return g_strdup(str);
1224         if (g_utf8_validate(str, -1, NULL) == FALSE)
1225                 return g_strdup(str);
1226
1227         while (*p != '\0') {
1228                 mb_len = g_utf8_skip[*(guchar *)p];
1229                 if (mb_len == 0)
1230                         break;
1231                 else if (new_len + mb_len > len)
1232                         break;
1233
1234                 new_len += mb_len;
1235                 p += mb_len;
1236         }
1237
1238         Xstrndup_a(new_str, str, new_len, return g_strdup(str));
1239         return g_strconcat(new_str, "...", NULL);
1240 }
1241
1242 GList *uri_list_extract_filenames(const gchar *uri_list)
1243 {
1244         GList *result = NULL;
1245         const gchar *p, *q;
1246         gchar *escaped_utf8uri;
1247
1248         p = uri_list;
1249
1250         while (p) {
1251                 if (*p != '#') {
1252                         while (g_ascii_isspace(*p)) p++;
1253                         if (!strncmp(p, "file:", 5)) {
1254                                 q = p;
1255                                 q += 5;
1256                                 while (*q && *q != '\n' && *q != '\r') q++;
1257
1258                                 if (q > p) {
1259                                         gchar *file, *locale_file = NULL;
1260                                         q--;
1261                                         while (q > p && g_ascii_isspace(*q))
1262                                                 q--;
1263                                         Xalloca(escaped_utf8uri, q - p + 2,
1264                                                 return result);
1265                                         Xalloca(file, q - p + 2,
1266                                                 return result);
1267                                         *file = '\0';
1268                                         strncpy(escaped_utf8uri, p, q - p + 1);
1269                                         escaped_utf8uri[q - p + 1] = '\0';
1270                                         decode_uri_with_plus(file, escaped_utf8uri, FALSE);
1271                     /*
1272                      * g_filename_from_uri() rejects escaped/locale encoded uri
1273                      * string which come from Nautilus.
1274                      */
1275 #ifndef G_OS_WIN32
1276                                         if (g_utf8_validate(file, -1, NULL))
1277                                                 locale_file
1278                                                         = conv_codeset_strdup(
1279                                                                 file + 5,
1280                                                                 CS_UTF_8,
1281                                                                 conv_get_locale_charset_str());
1282                                         if (!locale_file)
1283                                                 locale_file = g_strdup(file + 5);
1284 #else
1285                                         locale_file = g_filename_from_uri(escaped_utf8uri, NULL, NULL);
1286 #endif
1287                                         result = g_list_append(result, locale_file);
1288                                 }
1289                         }
1290                 }
1291                 p = strchr(p, '\n');
1292                 if (p) p++;
1293         }
1294
1295         return result;
1296 }
1297
1298 /* Converts two-digit hexadecimal to decimal.  Used for unescaping escaped
1299  * characters
1300  */
1301 static gint axtoi(const gchar *hexstr)
1302 {
1303         gint hi, lo, result;
1304
1305         hi = hexstr[0];
1306         if ('0' <= hi && hi <= '9') {
1307                 hi -= '0';
1308         } else
1309                 if ('a' <= hi && hi <= 'f') {
1310                         hi -= ('a' - 10);
1311                 } else
1312                         if ('A' <= hi && hi <= 'F') {
1313                                 hi -= ('A' - 10);
1314                         }
1315
1316         lo = hexstr[1];
1317         if ('0' <= lo && lo <= '9') {
1318                 lo -= '0';
1319         } else
1320                 if ('a' <= lo && lo <= 'f') {
1321                         lo -= ('a'-10);
1322                 } else
1323                         if ('A' <= lo && lo <= 'F') {
1324                                 lo -= ('A' - 10);
1325                         }
1326         result = lo + (16 * hi);
1327         return result;
1328 }
1329
1330 gboolean is_uri_string(const gchar *str)
1331 {
1332         while (str && *str && g_ascii_isspace(*str))
1333                 str++;
1334         return (g_ascii_strncasecmp(str, "http://", 7) == 0 ||
1335                 g_ascii_strncasecmp(str, "https://", 8) == 0 ||
1336                 g_ascii_strncasecmp(str, "ftp://", 6) == 0 ||
1337                 g_ascii_strncasecmp(str, "ftps://", 7) == 0 ||
1338                 g_ascii_strncasecmp(str, "sftp://", 7) == 0 ||
1339                 g_ascii_strncasecmp(str, "ftp.", 4) == 0 ||
1340                 g_ascii_strncasecmp(str, "webcal://", 9) == 0 ||
1341                 g_ascii_strncasecmp(str, "webcals://", 10) == 0 ||
1342                 g_ascii_strncasecmp(str, "www.", 4) == 0);
1343 }
1344
1345 gchar *get_uri_path(const gchar *uri)
1346 {
1347         while (uri && *uri && g_ascii_isspace(*uri))
1348                 uri++;
1349         if (g_ascii_strncasecmp(uri, "http://", 7) == 0)
1350                 return (gchar *)(uri + 7);
1351         else if (g_ascii_strncasecmp(uri, "https://", 8) == 0)
1352                 return (gchar *)(uri + 8);
1353         else if (g_ascii_strncasecmp(uri, "ftp://", 6) == 0)
1354                 return (gchar *)(uri + 6);
1355         else if (g_ascii_strncasecmp(uri, "ftps://", 7) == 0)
1356                 return (gchar *)(uri + 7);
1357         else if (g_ascii_strncasecmp(uri, "sftp://", 7) == 0)
1358                 return (gchar *)(uri + 7);
1359         else if (g_ascii_strncasecmp(uri, "webcal://", 9) == 0)
1360                 return (gchar *)(uri + 7);
1361         else if (g_ascii_strncasecmp(uri, "webcals://", 10) == 0)
1362                 return (gchar *)(uri + 7);
1363         else
1364                 return (gchar *)uri;
1365 }
1366
1367 gint get_uri_len(const gchar *str)
1368 {
1369         const gchar *p;
1370
1371         if (is_uri_string(str)) {
1372                 for (p = str; *p != '\0'; p++) {
1373                         if (!g_ascii_isgraph(*p) || strchr("<>\"", *p))
1374                                 break;
1375                 }
1376                 return p - str;
1377         }
1378
1379         return 0;
1380 }
1381
1382 /* Decodes URL-Encoded strings (i.e. strings in which spaces are replaced by
1383  * plusses, and escape characters are used)
1384  */
1385 void decode_uri_with_plus(gchar *decoded_uri, const gchar *encoded_uri, gboolean with_plus)
1386 {
1387         gchar *dec = decoded_uri;
1388         const gchar *enc = encoded_uri;
1389
1390         while (*enc) {
1391                 if (*enc == '%') {
1392                         enc++;
1393                         if (isxdigit((guchar)enc[0]) &&
1394                             isxdigit((guchar)enc[1])) {
1395                                 *dec = axtoi(enc);
1396                                 dec++;
1397                                 enc += 2;
1398                         }
1399                 } else {
1400                         if (with_plus && *enc == '+')
1401                                 *dec = ' ';
1402                         else
1403                                 *dec = *enc;
1404                         dec++;
1405                         enc++;
1406                 }
1407         }
1408
1409         *dec = '\0';
1410 }
1411
1412 void decode_uri(gchar *decoded_uri, const gchar *encoded_uri)
1413 {
1414         decode_uri_with_plus(decoded_uri, encoded_uri, TRUE);
1415 }
1416
1417 static gchar *decode_uri_gdup(const gchar *encoded_uri)
1418 {
1419     gchar *buffer = g_malloc(strlen(encoded_uri)+1);
1420     decode_uri_with_plus(buffer, encoded_uri, FALSE);
1421     return buffer;
1422 }
1423
1424 gint scan_mailto_url(const gchar *mailto, gchar **from, gchar **to, gchar **cc, gchar **bcc,
1425                      gchar **subject, gchar **body, gchar ***attach, gchar **inreplyto)
1426 {
1427         gchar *tmp_mailto;
1428         gchar *p;
1429         const gchar *forbidden_uris[] = { ".gnupg/",
1430                                           "/etc/passwd",
1431                                           "/etc/shadow",
1432                                           ".ssh/",
1433                                           "../",
1434                                           NULL };
1435         gint num_attach = 0;
1436
1437         cm_return_val_if_fail(mailto != NULL, -1);
1438
1439         Xstrdup_a(tmp_mailto, mailto, return -1);
1440
1441         if (!strncmp(tmp_mailto, "mailto:", 7))
1442                 tmp_mailto += 7;
1443
1444         p = strchr(tmp_mailto, '?');
1445         if (p) {
1446                 *p = '\0';
1447                 p++;
1448         }
1449
1450         if (to && !*to)
1451                 *to = decode_uri_gdup(tmp_mailto);
1452
1453         while (p) {
1454                 gchar *field, *value;
1455
1456                 field = p;
1457
1458                 p = strchr(p, '=');
1459                 if (!p) break;
1460                 *p = '\0';
1461                 p++;
1462
1463                 value = p;
1464
1465                 p = strchr(p, '&');
1466                 if (p) {
1467                         *p = '\0';
1468                         p++;
1469                 }
1470
1471                 if (*value == '\0') continue;
1472
1473                 if (from && !g_ascii_strcasecmp(field, "from")) {
1474                         if (!*from) {
1475                                 *from = decode_uri_gdup(value);
1476                         } else {
1477                                 gchar *tmp = decode_uri_gdup(value);
1478                                 gchar *new_from = g_strdup_printf("%s, %s", *from, tmp);
1479                                 g_free(tmp);
1480                                 g_free(*from);
1481                                 *from = new_from;
1482                         }
1483                 } else if (cc && !g_ascii_strcasecmp(field, "cc")) {
1484                         if (!*cc) {
1485                                 *cc = decode_uri_gdup(value);
1486                         } else {
1487                                 gchar *tmp = decode_uri_gdup(value);
1488                                 gchar *new_cc = g_strdup_printf("%s, %s", *cc, tmp);
1489                                 g_free(tmp);
1490                                 g_free(*cc);
1491                                 *cc = new_cc;
1492                         }
1493                 } else if (bcc && !g_ascii_strcasecmp(field, "bcc")) {
1494                         if (!*bcc) {
1495                                 *bcc = decode_uri_gdup(value);
1496                         } else {
1497                                 gchar *tmp = decode_uri_gdup(value);
1498                                 gchar *new_bcc = g_strdup_printf("%s, %s", *bcc, tmp);
1499                                 g_free(tmp);
1500                                 g_free(*bcc);
1501                                 *bcc = new_bcc;
1502                         }
1503                 } else if (subject && !*subject &&
1504                            !g_ascii_strcasecmp(field, "subject")) {
1505                         *subject = decode_uri_gdup(value);
1506                 } else if (body && !*body && !g_ascii_strcasecmp(field, "body")) {
1507                         *body = decode_uri_gdup(value);
1508                 } else if (body && !*body && !g_ascii_strcasecmp(field, "insert")) {
1509                         int i = 0;
1510                         gchar *tmp = decode_uri_gdup(value);
1511
1512                         for (; forbidden_uris[i]; i++) {
1513                                 if (strstr(tmp, forbidden_uris[i])) {
1514                                         g_print("Refusing to insert '%s', potential private data leak\n",
1515                                                         tmp);
1516                                         g_free(tmp);
1517                                         tmp = NULL;
1518                                         break;
1519                                 }
1520                         }
1521
1522                         if (tmp) {
1523                                 if (!is_file_entry_regular(tmp)) {
1524                                         g_warning("refusing to insert '%s', not a regular file", tmp);
1525                                 } else if (!g_file_get_contents(tmp, body, NULL, NULL)) {
1526                                         g_warning("couldn't set insert file '%s' in body", value);
1527                                 }
1528
1529                                 g_free(tmp);
1530                         }
1531                 } else if (attach && !g_ascii_strcasecmp(field, "attach")) {
1532                         int i = 0;
1533                         gchar *tmp = decode_uri_gdup(value);
1534                         gchar **my_att = g_malloc(sizeof(char *));
1535
1536                         my_att[0] = NULL;
1537
1538                         for (; forbidden_uris[i]; i++) {
1539                                 if (strstr(tmp, forbidden_uris[i])) {
1540                                         g_print("Refusing to attach '%s', potential private data leak\n",
1541                                                         tmp);
1542                                         g_free(tmp);
1543                                         tmp = NULL;
1544                                         break;
1545                                 }
1546                         }
1547                         if (tmp) {
1548                                 /* attach is correct */
1549                                 num_attach++;
1550                                 my_att = g_realloc(my_att, (sizeof(char *))*(num_attach+1));
1551                                 my_att[num_attach-1] = tmp;
1552                                 my_att[num_attach] = NULL;
1553                                 *attach = my_att;
1554                         }
1555             else
1556                                 g_free(my_att);
1557                 } else if (inreplyto && !*inreplyto &&
1558                            !g_ascii_strcasecmp(field, "in-reply-to")) {
1559                         *inreplyto = decode_uri_gdup(value);
1560                 }
1561         }
1562
1563         return 0;
1564 }
1565
1566
1567 #ifdef G_OS_WIN32
1568 #include <windows.h>
1569 #ifndef CSIDL_APPDATA
1570 #define CSIDL_APPDATA 0x001a
1571 #endif
1572 #ifndef CSIDL_LOCAL_APPDATA
1573 #define CSIDL_LOCAL_APPDATA 0x001c
1574 #endif
1575 #ifndef CSIDL_FLAG_CREATE
1576 #define CSIDL_FLAG_CREATE 0x8000
1577 #endif
1578 #define DIM(v)               (sizeof(v)/sizeof((v)[0]))
1579
1580 #define RTLD_LAZY 0
1581 const char *
1582 w32_strerror (int w32_errno)
1583 {
1584   static char strerr[256];
1585   int ec = (int)GetLastError ();
1586
1587   if (w32_errno == 0)
1588     w32_errno = ec;
1589   FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, w32_errno,
1590                  MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
1591                  strerr, DIM (strerr)-1, NULL);
1592   return strerr;
1593 }
1594
1595 static __inline__ void *
1596 dlopen (const char * name, int flag)
1597 {
1598   void * hd = LoadLibrary (name);
1599   return hd;
1600 }
1601
1602 static __inline__ void *
1603 dlsym (void * hd, const char * sym)
1604 {
1605   if (hd && sym)
1606     {
1607       void * fnc = GetProcAddress (hd, sym);
1608       if (!fnc)
1609         return NULL;
1610       return fnc;
1611     }
1612   return NULL;
1613 }
1614
1615
1616 static __inline__ const char *
1617 dlerror (void)
1618 {
1619   return w32_strerror (0);
1620 }
1621
1622
1623 static __inline__ int
1624 dlclose (void * hd)
1625 {
1626   if (hd)
1627     {
1628       FreeLibrary (hd);
1629       return 0;
1630     }
1631   return -1;
1632 }
1633
1634 static HRESULT
1635 w32_shgetfolderpath (HWND a, int b, HANDLE c, DWORD d, LPSTR e)
1636 {
1637   static int initialized;
1638   static HRESULT (WINAPI * func)(HWND,int,HANDLE,DWORD,LPSTR);
1639
1640   if (!initialized)
1641     {
1642       static char *dllnames[] = { "shell32.dll", "shfolder.dll", NULL };
1643       void *handle;
1644       int i;
1645
1646       initialized = 1;
1647
1648       for (i=0, handle = NULL; !handle && dllnames[i]; i++)
1649         {
1650           handle = dlopen (dllnames[i], RTLD_LAZY);
1651           if (handle)
1652             {
1653               func = dlsym (handle, "SHGetFolderPathW");
1654               if (!func)
1655                 {
1656                   dlclose (handle);
1657                   handle = NULL;
1658                 }
1659             }
1660         }
1661     }
1662
1663   if (func)
1664     return func (a,b,c,d,e);
1665   else
1666     return -1;
1667 }
1668
1669 /* Returns a static string with the directroy from which the module
1670    has been loaded.  Returns an empty string on error. */
1671 static char *w32_get_module_dir(void)
1672 {
1673         static char *moddir;
1674
1675         if (!moddir) {
1676                 char name[MAX_PATH+10];
1677                 char *p;
1678
1679                 if ( !GetModuleFileNameA (0, name, sizeof (name)-10) )
1680                         *name = 0;
1681                 else {
1682                         p = strrchr (name, '\\');
1683                         if (p)
1684                                 *p = 0;
1685                         else
1686                                 *name = 0;
1687                 }
1688                 moddir = g_strdup (name);
1689         }
1690         return moddir;
1691 }
1692 #endif /* G_OS_WIN32 */
1693
1694 /* Return a static string with the locale dir. */
1695 const gchar *get_locale_dir(void)
1696 {
1697         static gchar *loc_dir;
1698
1699 #ifdef G_OS_WIN32
1700         if (!loc_dir)
1701                 loc_dir = g_strconcat(w32_get_module_dir(), G_DIR_SEPARATOR_S,
1702                                       "\\share\\locale", NULL);
1703 #endif
1704         if (!loc_dir)
1705                 loc_dir = LOCALEDIR;
1706
1707         return loc_dir;
1708 }
1709
1710
1711 const gchar *get_home_dir(void)
1712 {
1713 #ifdef G_OS_WIN32
1714         static char home_dir_utf16[MAX_PATH] = "";
1715         static gchar *home_dir_utf8 = NULL;
1716         if (home_dir_utf16[0] == '\0') {
1717                 if (w32_shgetfolderpath
1718                             (NULL, CSIDL_APPDATA|CSIDL_FLAG_CREATE,
1719                              NULL, 0, home_dir_utf16) < 0)
1720                                 strcpy (home_dir_utf16, "C:\\Claws Mail");
1721                 home_dir_utf8 = g_utf16_to_utf8 ((const gunichar2 *)home_dir_utf16, -1, NULL, NULL, NULL);
1722         }
1723         return home_dir_utf8;
1724 #else
1725         static const gchar *homeenv = NULL;
1726
1727         if (homeenv)
1728                 return homeenv;
1729
1730         if (!homeenv && g_getenv("HOME") != NULL)
1731                 homeenv = g_strdup(g_getenv("HOME"));
1732         if (!homeenv)
1733                 homeenv = g_get_home_dir();
1734
1735         return homeenv;
1736 #endif
1737 }
1738
1739 static gchar *claws_rc_dir = NULL;
1740 static gboolean rc_dir_alt = FALSE;
1741 const gchar *get_rc_dir(void)
1742 {
1743
1744         if (!claws_rc_dir) {
1745                 claws_rc_dir = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1746                                      RC_DIR, NULL);
1747                 debug_print("using default rc_dir %s\n", claws_rc_dir);
1748         }
1749         return claws_rc_dir;
1750 }
1751
1752 void set_rc_dir(const gchar *dir)
1753 {
1754         gchar *canonical_dir;
1755         if (claws_rc_dir != NULL) {
1756                 g_print("Error: rc_dir already set\n");
1757         } else {
1758                 int err = cm_canonicalize_filename(dir, &canonical_dir);
1759                 int len;
1760
1761                 if (err) {
1762                         g_print("Error looking for %s: %d(%s)\n",
1763                                 dir, -err, g_strerror(-err));
1764                         exit(0);
1765                 }
1766                 rc_dir_alt = TRUE;
1767
1768                 claws_rc_dir = canonical_dir;
1769
1770                 len = strlen(claws_rc_dir);
1771                 if (claws_rc_dir[len - 1] == G_DIR_SEPARATOR)
1772                         claws_rc_dir[len - 1] = '\0';
1773
1774                 debug_print("set rc_dir to %s\n", claws_rc_dir);
1775                 if (!is_dir_exist(claws_rc_dir)) {
1776                         if (make_dir_hier(claws_rc_dir) != 0) {
1777                                 g_print("Error: can't create %s\n",
1778                                 claws_rc_dir);
1779                                 exit(0);
1780                         }
1781                 }
1782         }
1783 }
1784
1785 gboolean rc_dir_is_alt(void) {
1786         return rc_dir_alt;
1787 }
1788
1789 const gchar *get_mail_base_dir(void)
1790 {
1791         return get_home_dir();
1792 }
1793
1794 const gchar *get_news_cache_dir(void)
1795 {
1796         static gchar *news_cache_dir = NULL;
1797         if (!news_cache_dir)
1798                 news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1799                                              NEWS_CACHE_DIR, NULL);
1800
1801         return news_cache_dir;
1802 }
1803
1804 const gchar *get_imap_cache_dir(void)
1805 {
1806         static gchar *imap_cache_dir = NULL;
1807
1808         if (!imap_cache_dir)
1809                 imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1810                                              IMAP_CACHE_DIR, NULL);
1811
1812         return imap_cache_dir;
1813 }
1814
1815 const gchar *get_mime_tmp_dir(void)
1816 {
1817         static gchar *mime_tmp_dir = NULL;
1818
1819         if (!mime_tmp_dir)
1820                 mime_tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1821                                            MIME_TMP_DIR, NULL);
1822
1823         return mime_tmp_dir;
1824 }
1825
1826 const gchar *get_template_dir(void)
1827 {
1828         static gchar *template_dir = NULL;
1829
1830         if (!template_dir)
1831                 template_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1832                                            TEMPLATE_DIR, NULL);
1833
1834         return template_dir;
1835 }
1836
1837 #ifdef G_OS_WIN32
1838 const gchar *w32_get_cert_file(void)
1839 {
1840         const gchar *cert_file = NULL;
1841         if (!cert_file)
1842                 cert_file = g_strconcat(w32_get_module_dir(),
1843                                  "\\share\\claws-mail\\",
1844                                 "ca-certificates.crt",
1845                                 NULL);
1846         return cert_file;
1847 }
1848 #endif
1849
1850 /* Return the filepath of the claws-mail.desktop file */
1851 const gchar *get_desktop_file(void)
1852 {
1853 #ifdef DESKTOPFILEPATH
1854   return DESKTOPFILEPATH;
1855 #else
1856   return NULL;
1857 #endif
1858 }
1859
1860 /* Return the default directory for Plugins. */
1861 const gchar *get_plugin_dir(void)
1862 {
1863 #ifdef G_OS_WIN32
1864         static gchar *plugin_dir = NULL;
1865
1866         if (!plugin_dir)
1867                 plugin_dir = g_strconcat(w32_get_module_dir(),
1868                                          "\\lib\\claws-mail\\plugins\\",
1869                                          NULL);
1870         return plugin_dir;
1871 #else
1872         if (is_dir_exist(PLUGINDIR))
1873                 return PLUGINDIR;
1874         else {
1875                 static gchar *plugin_dir = NULL;
1876                 if (!plugin_dir)
1877                         plugin_dir = g_strconcat(get_rc_dir(),
1878                                 G_DIR_SEPARATOR_S, "plugins",
1879                                 G_DIR_SEPARATOR_S, NULL);
1880                 return plugin_dir;
1881         }
1882 #endif
1883 }
1884
1885
1886 #ifdef G_OS_WIN32
1887 /* Return the default directory for Themes. */
1888 const gchar *w32_get_themes_dir(void)
1889 {
1890         static gchar *themes_dir = NULL;
1891
1892         if (!themes_dir)
1893                 themes_dir = g_strconcat(w32_get_module_dir(),
1894                                          "\\share\\claws-mail\\themes",
1895                                          NULL);
1896         return themes_dir;
1897 }
1898 #endif
1899
1900 const gchar *get_tmp_dir(void)
1901 {
1902         static gchar *tmp_dir = NULL;
1903
1904         if (!tmp_dir)
1905                 tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1906                                       TMP_DIR, NULL);
1907
1908         return tmp_dir;
1909 }
1910
1911 gchar *get_tmp_file(void)
1912 {
1913         gchar *tmp_file;
1914         static guint32 id = 0;
1915
1916         tmp_file = g_strdup_printf("%s%ctmpfile.%08x",
1917                                    get_tmp_dir(), G_DIR_SEPARATOR, id++);
1918
1919         return tmp_file;
1920 }
1921
1922 const gchar *get_domain_name(void)
1923 {
1924 #ifdef G_OS_UNIX
1925         static gchar *domain_name = NULL;
1926         struct addrinfo hints, *res;
1927         char hostname[256];
1928         int s;
1929
1930         if (!domain_name) {
1931                 if (gethostname(hostname, sizeof(hostname)) != 0) {
1932                         perror("gethostname");
1933                         domain_name = "localhost";
1934                 } else {
1935                         memset(&hints, 0, sizeof(struct addrinfo));
1936                         hints.ai_family = AF_UNSPEC;
1937                         hints.ai_socktype = 0;
1938                         hints.ai_flags = AI_CANONNAME;
1939                         hints.ai_protocol = 0;
1940
1941                         s = getaddrinfo(hostname, NULL, &hints, &res);
1942                         if (s != 0) {
1943                                 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
1944                                 domain_name = g_strdup(hostname);
1945                         } else {
1946                                 domain_name = g_strdup(res->ai_canonname);
1947                                 freeaddrinfo(res);
1948                         }
1949                 }
1950                 debug_print("domain name = %s\n", domain_name);
1951         }
1952
1953         return domain_name;
1954 #else
1955         return "localhost";
1956 #endif
1957 }
1958
1959 /* Tells whether the given host address string is a valid representation of a
1960  * numerical IP (v4 or, if supported, v6) address.
1961  */
1962 gboolean is_numeric_host_address(const gchar *hostaddress)
1963 {
1964         struct addrinfo hints, *res;
1965         int err;
1966
1967         /* See what getaddrinfo makes of the string when told that it is a
1968          * numeric IP address representation. */
1969         memset(&hints, 0, sizeof(struct addrinfo));
1970         hints.ai_family = AF_UNSPEC;
1971         hints.ai_socktype = 0;
1972         hints.ai_flags = AI_NUMERICHOST;
1973         hints.ai_protocol = 0;
1974
1975         err = getaddrinfo(hostaddress, NULL, &hints, &res);
1976         if (err == 0)
1977                 freeaddrinfo(res);
1978
1979         return (err == 0);
1980 }
1981
1982 off_t get_file_size(const gchar *file)
1983 {
1984 #ifdef G_OS_WIN32
1985         GFile *f;
1986         GFileInfo *fi;
1987         GError *error = NULL;
1988         goffset size;
1989
1990         f = g_file_new_for_path(file);
1991         fi = g_file_query_info(f, "standard::size",
1992                         G_FILE_QUERY_INFO_NONE, NULL, &error);
1993         if (error != NULL) {
1994                 debug_print("get_file_size error: %s\n", error->message);
1995                 g_error_free(error);
1996                 g_object_unref(f);
1997                 return -1;
1998         }
1999         size = g_file_info_get_size(fi);
2000         g_object_unref(fi);
2001         g_object_unref(f);
2002         return size;
2003
2004 #else
2005         GStatBuf s;
2006
2007         if (g_stat(file, &s) < 0) {
2008                 FILE_OP_ERROR(file, "stat");
2009                 return -1;
2010         }
2011
2012         return s.st_size;
2013 #endif
2014 }
2015
2016 time_t get_file_mtime(const gchar *file)
2017 {
2018         GStatBuf s;
2019
2020         if (g_stat(file, &s) < 0) {
2021                 FILE_OP_ERROR(file, "stat");
2022                 return -1;
2023         }
2024
2025         return s.st_mtime;
2026 }
2027
2028 gboolean file_exist(const gchar *file, gboolean allow_fifo)
2029 {
2030         GStatBuf s;
2031
2032         if (file == NULL)
2033                 return FALSE;
2034
2035         if (g_stat(file, &s) < 0) {
2036                 if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
2037                 return FALSE;
2038         }
2039
2040         if (S_ISREG(s.st_mode) || (allow_fifo && S_ISFIFO(s.st_mode)))
2041                 return TRUE;
2042
2043         return FALSE;
2044 }
2045
2046
2047 /* Test on whether FILE is a relative file name. This is
2048  * straightforward for Unix but more complex for Windows. */
2049 gboolean is_relative_filename(const gchar *file)
2050 {
2051         if (!file)
2052                 return TRUE;
2053 #ifdef G_OS_WIN32
2054         if ( *file == '\\' && file[1] == '\\' && strchr (file+2, '\\') )
2055                 return FALSE; /* Prefixed with a hostname - this can't
2056                                * be a relative name. */
2057
2058         if ( ((*file >= 'a' && *file <= 'z')
2059               || (*file >= 'A' && *file <= 'Z'))
2060              && file[1] == ':')
2061                 file += 2;  /* Skip drive letter. */
2062
2063         return !(*file == '\\' || *file == '/');
2064 #else
2065         return !(*file == G_DIR_SEPARATOR);
2066 #endif
2067 }
2068
2069
2070 gboolean is_dir_exist(const gchar *dir)
2071 {
2072         if (dir == NULL)
2073                 return FALSE;
2074
2075         return g_file_test(dir, G_FILE_TEST_IS_DIR);
2076 }
2077
2078 gboolean is_file_entry_exist(const gchar *file)
2079 {
2080         if (file == NULL)
2081                 return FALSE;
2082
2083         return g_file_test(file, G_FILE_TEST_EXISTS);
2084 }
2085
2086 gboolean is_file_entry_regular(const gchar *file)
2087 {
2088         if (file == NULL)
2089                 return FALSE;
2090
2091         return g_file_test(file, G_FILE_TEST_IS_REGULAR);
2092 }
2093
2094 gboolean dirent_is_regular_file(struct dirent *d)
2095 {
2096 #if !defined(G_OS_WIN32) && defined(HAVE_DIRENT_D_TYPE)
2097         if (d->d_type == DT_REG)
2098                 return TRUE;
2099         else if (d->d_type != DT_UNKNOWN)
2100                 return FALSE;
2101 #endif
2102
2103         return g_file_test(d->d_name, G_FILE_TEST_IS_REGULAR);
2104 }
2105
2106 gint change_dir(const gchar *dir)
2107 {
2108         gchar *prevdir = NULL;
2109
2110         if (debug_mode)
2111                 prevdir = g_get_current_dir();
2112
2113         if (g_chdir(dir) < 0) {
2114                 FILE_OP_ERROR(dir, "chdir");
2115                 if (debug_mode) g_free(prevdir);
2116                 return -1;
2117         } else if (debug_mode) {
2118                 gchar *cwd;
2119
2120                 cwd = g_get_current_dir();
2121                 if (strcmp(prevdir, cwd) != 0)
2122                         g_print("current dir: %s\n", cwd);
2123                 g_free(cwd);
2124                 g_free(prevdir);
2125         }
2126
2127         return 0;
2128 }
2129
2130 gint make_dir(const gchar *dir)
2131 {
2132         if (g_mkdir(dir, S_IRWXU) < 0) {
2133                 FILE_OP_ERROR(dir, "mkdir");
2134                 return -1;
2135         }
2136         if (g_chmod(dir, S_IRWXU) < 0)
2137                 FILE_OP_ERROR(dir, "chmod");
2138
2139         return 0;
2140 }
2141
2142 gint make_dir_hier(const gchar *dir)
2143 {
2144         gchar *parent_dir;
2145         const gchar *p;
2146
2147         for (p = dir; (p = strchr(p, G_DIR_SEPARATOR)) != NULL; p++) {
2148                 parent_dir = g_strndup(dir, p - dir);
2149                 if (*parent_dir != '\0') {
2150                         if (!is_dir_exist(parent_dir)) {
2151                                 if (make_dir(parent_dir) < 0) {
2152                                         g_free(parent_dir);
2153                                         return -1;
2154                                 }
2155                         }
2156                 }
2157                 g_free(parent_dir);
2158         }
2159
2160         if (!is_dir_exist(dir)) {
2161                 if (make_dir(dir) < 0)
2162                         return -1;
2163         }
2164
2165         return 0;
2166 }
2167
2168 gint remove_all_files(const gchar *dir)
2169 {
2170         GDir *dp;
2171         const gchar *file_name;
2172         gchar *tmp;
2173
2174         if ((dp = g_dir_open(dir, 0, NULL)) == NULL) {
2175                 g_warning("failed to open directory: %s", dir);
2176                 return -1;
2177         }
2178
2179         while ((file_name = g_dir_read_name(dp)) != NULL) {
2180                 tmp = g_strconcat(dir, G_DIR_SEPARATOR_S, file_name, NULL);
2181                 if (claws_unlink(tmp) < 0)
2182                         FILE_OP_ERROR(tmp, "unlink");
2183                 g_free(tmp);
2184         }
2185
2186         g_dir_close(dp);
2187
2188         return 0;
2189 }
2190
2191 gint remove_numbered_files(const gchar *dir, guint first, guint last)
2192 {
2193         GDir *dp;
2194         const gchar *dir_name;
2195         gchar *prev_dir;
2196         gint file_no;
2197
2198         if (first == last) {
2199                 /* Skip all the dir reading part. */
2200                 gchar *filename = g_strdup_printf("%s%s%u", dir, G_DIR_SEPARATOR_S, first);
2201                 if (is_dir_exist(filename)) {
2202                         /* a numbered directory with this name exists,
2203                          * remove the dot-file instead */
2204                         g_free(filename);
2205                         filename = g_strdup_printf("%s%s.%u", dir, G_DIR_SEPARATOR_S, first);
2206                 }
2207                 if (claws_unlink(filename) < 0) {
2208                         FILE_OP_ERROR(filename, "unlink");
2209                         g_free(filename);
2210                         return -1;
2211                 }
2212                 g_free(filename);
2213                 return 0;
2214         }
2215
2216         prev_dir = g_get_current_dir();
2217
2218         if (g_chdir(dir) < 0) {
2219                 FILE_OP_ERROR(dir, "chdir");
2220                 g_free(prev_dir);
2221                 return -1;
2222         }
2223
2224         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2225                 g_warning("failed to open directory: %s", dir);
2226                 g_free(prev_dir);
2227                 return -1;
2228         }
2229
2230         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2231                 file_no = to_number(dir_name);
2232                 if (file_no > 0 && first <= file_no && file_no <= last) {
2233                         if (is_dir_exist(dir_name)) {
2234                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2235                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2236                                         FILE_OP_ERROR(dot_file, "unlink");
2237                                 }
2238                                 g_free(dot_file);
2239                                 continue;
2240                         }
2241                         if (claws_unlink(dir_name) < 0)
2242                                 FILE_OP_ERROR(dir_name, "unlink");
2243                 }
2244         }
2245
2246         g_dir_close(dp);
2247
2248         if (g_chdir(prev_dir) < 0) {
2249                 FILE_OP_ERROR(prev_dir, "chdir");
2250                 g_free(prev_dir);
2251                 return -1;
2252         }
2253
2254         g_free(prev_dir);
2255
2256         return 0;
2257 }
2258
2259 gint remove_numbered_files_not_in_list(const gchar *dir, GSList *numberlist)
2260 {
2261         GDir *dp;
2262         const gchar *dir_name;
2263         gchar *prev_dir;
2264         gint file_no;
2265         GHashTable *wanted_files;
2266         GSList *cur;
2267         GError *error = NULL;
2268
2269         if (numberlist == NULL)
2270             return 0;
2271
2272         prev_dir = g_get_current_dir();
2273
2274         if (g_chdir(dir) < 0) {
2275                 FILE_OP_ERROR(dir, "chdir");
2276                 g_free(prev_dir);
2277                 return -1;
2278         }
2279
2280         if ((dp = g_dir_open(".", 0, &error)) == NULL) {
2281                 g_message("Couldn't open current directory: %s (%d).\n",
2282                                 error->message, error->code);
2283                 g_error_free(error);
2284                 g_free(prev_dir);
2285                 return -1;
2286         }
2287
2288         wanted_files = g_hash_table_new(g_direct_hash, g_direct_equal);
2289         for (cur = numberlist; cur != NULL; cur = cur->next) {
2290                 /* numberlist->data is expected to be GINT_TO_POINTER */
2291                 g_hash_table_insert(wanted_files, cur->data, GINT_TO_POINTER(1));
2292         }
2293
2294         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2295                 file_no = to_number(dir_name);
2296                 if (is_dir_exist(dir_name))
2297                         continue;
2298                 if (file_no > 0 && g_hash_table_lookup(wanted_files, GINT_TO_POINTER(file_no)) == NULL) {
2299                         debug_print("removing unwanted file %d from %s\n", file_no, dir);
2300                         if (is_dir_exist(dir_name)) {
2301                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2302                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2303                                         FILE_OP_ERROR(dot_file, "unlink");
2304                                 }
2305                                 g_free(dot_file);
2306                                 continue;
2307                         }
2308                         if (claws_unlink(dir_name) < 0)
2309                                 FILE_OP_ERROR(dir_name, "unlink");
2310                 }
2311         }
2312
2313         g_dir_close(dp);
2314         g_hash_table_destroy(wanted_files);
2315
2316         if (g_chdir(prev_dir) < 0) {
2317                 FILE_OP_ERROR(prev_dir, "chdir");
2318                 g_free(prev_dir);
2319                 return -1;
2320         }
2321
2322         g_free(prev_dir);
2323
2324         return 0;
2325 }
2326
2327 gint remove_all_numbered_files(const gchar *dir)
2328 {
2329         return remove_numbered_files(dir, 0, UINT_MAX);
2330 }
2331
2332 gint remove_dir_recursive(const gchar *dir)
2333 {
2334         GStatBuf s;
2335         GDir *dp;
2336         const gchar *dir_name;
2337         gchar *prev_dir;
2338
2339         if (g_stat(dir, &s) < 0) {
2340                 FILE_OP_ERROR(dir, "stat");
2341                 if (ENOENT == errno) return 0;
2342                 return -(errno);
2343         }
2344
2345         if (!S_ISDIR(s.st_mode)) {
2346                 if (claws_unlink(dir) < 0) {
2347                         FILE_OP_ERROR(dir, "unlink");
2348                         return -(errno);
2349                 }
2350
2351                 return 0;
2352         }
2353
2354         prev_dir = g_get_current_dir();
2355         /* g_print("prev_dir = %s\n", prev_dir); */
2356
2357         if (!path_cmp(prev_dir, dir)) {
2358                 g_free(prev_dir);
2359                 if (g_chdir("..") < 0) {
2360                         FILE_OP_ERROR(dir, "chdir");
2361                         return -(errno);
2362                 }
2363                 prev_dir = g_get_current_dir();
2364         }
2365
2366         if (g_chdir(dir) < 0) {
2367                 FILE_OP_ERROR(dir, "chdir");
2368                 g_free(prev_dir);
2369                 return -(errno);
2370         }
2371
2372         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2373                 g_warning("failed to open directory: %s", dir);
2374                 g_chdir(prev_dir);
2375                 g_free(prev_dir);
2376                 return -(errno);
2377         }
2378
2379         /* remove all files in the directory */
2380         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2381                 /* g_print("removing %s\n", dir_name); */
2382
2383                 if (is_dir_exist(dir_name)) {
2384                         gint ret;
2385
2386                         if ((ret = remove_dir_recursive(dir_name)) < 0) {
2387                                 g_warning("can't remove directory: %s", dir_name);
2388                                 g_dir_close(dp);
2389                                 return ret;
2390                         }
2391                 } else {
2392                         if (claws_unlink(dir_name) < 0)
2393                                 FILE_OP_ERROR(dir_name, "unlink");
2394                 }
2395         }
2396
2397         g_dir_close(dp);
2398
2399         if (g_chdir(prev_dir) < 0) {
2400                 FILE_OP_ERROR(prev_dir, "chdir");
2401                 g_free(prev_dir);
2402                 return -(errno);
2403         }
2404
2405         g_free(prev_dir);
2406
2407         if (g_rmdir(dir) < 0) {
2408                 FILE_OP_ERROR(dir, "rmdir");
2409                 return -(errno);
2410         }
2411
2412         return 0;
2413 }
2414
2415 /* convert line endings into CRLF. If the last line doesn't end with
2416  * linebreak, add it.
2417  */
2418 gchar *canonicalize_str(const gchar *str)
2419 {
2420         const gchar *p;
2421         guint new_len = 0;
2422         gchar *out, *outp;
2423
2424         for (p = str; *p != '\0'; ++p) {
2425                 if (*p != '\r') {
2426                         ++new_len;
2427                         if (*p == '\n')
2428                                 ++new_len;
2429                 }
2430         }
2431         if (p == str || *(p - 1) != '\n')
2432                 new_len += 2;
2433
2434         out = outp = g_malloc(new_len + 1);
2435         for (p = str; *p != '\0'; ++p) {
2436                 if (*p != '\r') {
2437                         if (*p == '\n')
2438                                 *outp++ = '\r';
2439                         *outp++ = *p;
2440                 }
2441         }
2442         if (p == str || *(p - 1) != '\n') {
2443                 *outp++ = '\r';
2444                 *outp++ = '\n';
2445         }
2446         *outp = '\0';
2447
2448         return out;
2449 }
2450
2451 gchar *normalize_newlines(const gchar *str)
2452 {
2453         const gchar *p;
2454         gchar *out, *outp;
2455
2456         out = outp = g_malloc(strlen(str) + 1);
2457         for (p = str; *p != '\0'; ++p) {
2458                 if (*p == '\r') {
2459                         if (*(p + 1) != '\n')
2460                                 *outp++ = '\n';
2461                 } else
2462                         *outp++ = *p;
2463         }
2464
2465         *outp = '\0';
2466
2467         return out;
2468 }
2469
2470 gchar *get_outgoing_rfc2822_str(FILE *fp)
2471 {
2472         gchar buf[BUFFSIZE];
2473         GString *str;
2474         gchar *ret;
2475
2476         str = g_string_new(NULL);
2477
2478         /* output header part */
2479         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2480                 strretchomp(buf);
2481                 if (!g_ascii_strncasecmp(buf, "Bcc:", 4)) {
2482                         gint next;
2483
2484                         for (;;) {
2485                                 next = fgetc(fp);
2486                                 if (next == EOF)
2487                                         break;
2488                                 else if (next != ' ' && next != '\t') {
2489                                         ungetc(next, fp);
2490                                         break;
2491                                 }
2492                                 if (claws_fgets(buf, sizeof(buf), fp) == NULL)
2493                                         break;
2494                         }
2495                 } else {
2496                         g_string_append(str, buf);
2497                         g_string_append(str, "\r\n");
2498                         if (buf[0] == '\0')
2499                                 break;
2500                 }
2501         }
2502
2503         /* output body part */
2504         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2505                 strretchomp(buf);
2506                 if (buf[0] == '.')
2507                         g_string_append_c(str, '.');
2508                 g_string_append(str, buf);
2509                 g_string_append(str, "\r\n");
2510         }
2511
2512         ret = str->str;
2513         g_string_free(str, FALSE);
2514
2515         return ret;
2516 }
2517
2518 /*
2519  * Create a new boundary in a way that it is very unlikely that this
2520  * will occur in the following text.  It would be easy to ensure
2521  * uniqueness if everything is either quoted-printable or base64
2522  * encoded (note that conversion is allowed), but because MIME bodies
2523  * may be nested, it may happen that the same boundary has already
2524  * been used.
2525  *
2526  *   boundary := 0*69<bchars> bcharsnospace
2527  *   bchars := bcharsnospace / " "
2528  *   bcharsnospace := DIGIT / ALPHA / "'" / "(" / ")" /
2529  *                  "+" / "_" / "," / "-" / "." /
2530  *                  "/" / ":" / "=" / "?"
2531  *
2532  * some special characters removed because of buggy MTAs
2533  */
2534
2535 gchar *generate_mime_boundary(const gchar *prefix)
2536 {
2537         static gchar tbl[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
2538                              "abcdefghijklmnopqrstuvwxyz"
2539                              "1234567890+_./=";
2540         gchar buf_uniq[24];
2541         gint i;
2542
2543         for (i = 0; i < sizeof(buf_uniq) - 1; i++)
2544                 buf_uniq[i] = tbl[g_random_int_range(0, sizeof(tbl) - 1)];
2545         buf_uniq[i] = '\0';
2546
2547         return g_strdup_printf("%s_/%s", prefix ? prefix : "MP",
2548                                buf_uniq);
2549 }
2550
2551 char *fgets_crlf(char *buf, int size, FILE *stream)
2552 {
2553         gboolean is_cr = FALSE;
2554         gboolean last_was_cr = FALSE;
2555         int c = 0;
2556         char *cs;
2557
2558         cs = buf;
2559         while (--size > 0 && (c = getc(stream)) != EOF)
2560         {
2561                 *cs++ = c;
2562                 is_cr = (c == '\r');
2563                 if (c == '\n') {
2564                         break;
2565                 }
2566                 if (last_was_cr) {
2567                         *(--cs) = '\n';
2568                         cs++;
2569                         ungetc(c, stream);
2570                         break;
2571                 }
2572                 last_was_cr = is_cr;
2573         }
2574         if (c == EOF && cs == buf)
2575                 return NULL;
2576
2577         *cs = '\0';
2578
2579         return buf;
2580 }
2581
2582 static gint execute_async(gchar *const argv[], const gchar *working_directory)
2583 {
2584         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
2585
2586         if (g_spawn_async(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
2587                           NULL, NULL, NULL, FALSE) == FALSE) {
2588                 g_warning("couldn't execute command: %s", argv[0]);
2589                 return -1;
2590         }
2591
2592         return 0;
2593 }
2594
2595 static gint execute_sync(gchar *const argv[], const gchar *working_directory)
2596 {
2597         gint status;
2598
2599         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
2600
2601 #ifdef G_OS_UNIX
2602         if (g_spawn_sync(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
2603                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
2604                 g_warning("couldn't execute command: %s", argv[0]);
2605                 return -1;
2606         }
2607
2608         if (WIFEXITED(status))
2609                 return WEXITSTATUS(status);
2610         else
2611                 return -1;
2612 #else
2613         if (g_spawn_sync(working_directory, (gchar **)argv, NULL,
2614                                 G_SPAWN_SEARCH_PATH|
2615                                 G_SPAWN_CHILD_INHERITS_STDIN|
2616                                 G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
2617                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
2618                 g_warning("couldn't execute command: %s", argv[0]);
2619                 return -1;
2620         }
2621
2622         return status;
2623 #endif
2624 }
2625
2626 gint execute_command_line(const gchar *cmdline, gboolean async,
2627                 const gchar *working_directory)
2628 {
2629         gchar **argv;
2630         gint ret;
2631
2632         cm_return_val_if_fail(cmdline != NULL, -1);
2633
2634         debug_print("execute_command_line(): executing: %s\n", cmdline);
2635
2636         argv = strsplit_with_quote(cmdline, " ", 0);
2637
2638         if (async)
2639                 ret = execute_async(argv, working_directory);
2640         else
2641                 ret = execute_sync(argv, working_directory);
2642
2643         g_strfreev(argv);
2644
2645         return ret;
2646 }
2647
2648 gchar *get_command_output(const gchar *cmdline)
2649 {
2650         gchar *child_stdout;
2651         gint status;
2652
2653         cm_return_val_if_fail(cmdline != NULL, NULL);
2654
2655         debug_print("get_command_output(): executing: %s\n", cmdline);
2656
2657         if (g_spawn_command_line_sync(cmdline, &child_stdout, NULL, &status,
2658                                       NULL) == FALSE) {
2659                 g_warning("couldn't execute command: %s", cmdline);
2660                 return NULL;
2661         }
2662
2663         return child_stdout;
2664 }
2665
2666 FILE *get_command_output_stream(const char* cmdline)
2667 {
2668     GPid pid;
2669         GError *err = NULL;
2670         gchar **argv = NULL;
2671     int fd;
2672
2673         cm_return_val_if_fail(cmdline != NULL, NULL);
2674
2675         debug_print("get_command_output_stream(): executing: %s\n", cmdline);
2676
2677         /* turn the command-line string into an array */
2678         if (!g_shell_parse_argv(cmdline, NULL, &argv, &err)) {
2679                 g_warning("could not parse command line from '%s': %s", cmdline, err->message);
2680         g_error_free(err);
2681                 return NULL;
2682         }
2683
2684     if (!g_spawn_async_with_pipes(NULL, argv, NULL, G_SPAWN_SEARCH_PATH,
2685                                   NULL, NULL, &pid, NULL, &fd, NULL, &err)
2686         && err)
2687     {
2688         g_warning("could not spawn '%s': %s", cmdline, err->message);
2689         g_error_free(err);
2690                 g_strfreev(argv);
2691         return NULL;
2692     }
2693
2694         g_strfreev(argv);
2695         return fdopen(fd, "r");
2696 }
2697
2698 #ifndef G_OS_WIN32
2699 static gint is_unchanged_uri_char(char c)
2700 {
2701         switch (c) {
2702                 case '(':
2703                 case ')':
2704                         return 0;
2705                 default:
2706                         return 1;
2707         }
2708 }
2709
2710 static void encode_uri(gchar *encoded_uri, gint bufsize, const gchar *uri)
2711 {
2712         int i;
2713         int k;
2714
2715         k = 0;
2716         for(i = 0; i < strlen(uri) ; i++) {
2717                 if (is_unchanged_uri_char(uri[i])) {
2718                         if (k + 2 >= bufsize)
2719                                 break;
2720                         encoded_uri[k++] = uri[i];
2721                 }
2722                 else {
2723                         char * hexa = "0123456789ABCDEF";
2724
2725                         if (k + 4 >= bufsize)
2726                                 break;
2727                         encoded_uri[k++] = '%';
2728                         encoded_uri[k++] = hexa[uri[i] / 16];
2729                         encoded_uri[k++] = hexa[uri[i] % 16];
2730                 }
2731         }
2732         encoded_uri[k] = 0;
2733 }
2734 #endif
2735
2736 gint open_uri(const gchar *uri, const gchar *cmdline)
2737 {
2738
2739 #ifndef G_OS_WIN32
2740         gchar buf[BUFFSIZE];
2741         gchar *p;
2742         gchar encoded_uri[BUFFSIZE];
2743         cm_return_val_if_fail(uri != NULL, -1);
2744
2745         /* an option to choose whether to use encode_uri or not ? */
2746         encode_uri(encoded_uri, BUFFSIZE, uri);
2747
2748         if (cmdline &&
2749             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2750             !strchr(p + 2, '%'))
2751                 g_snprintf(buf, sizeof(buf), cmdline, encoded_uri);
2752         else {
2753                 if (cmdline)
2754                         g_warning("Open URI command-line is invalid "
2755                                   "(there must be only one '%%s'): %s",
2756                                   cmdline);
2757                 g_snprintf(buf, sizeof(buf), DEFAULT_BROWSER_CMD, encoded_uri);
2758         }
2759
2760         execute_command_line(buf, TRUE, NULL);
2761 #else
2762         ShellExecute(NULL, "open", uri, NULL, NULL, SW_SHOW);
2763 #endif
2764         return 0;
2765 }
2766
2767 gint open_txt_editor(const gchar *filepath, const gchar *cmdline)
2768 {
2769         gchar buf[BUFFSIZE];
2770         gchar *p;
2771
2772         cm_return_val_if_fail(filepath != NULL, -1);
2773
2774         if (cmdline &&
2775             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2776             !strchr(p + 2, '%'))
2777                 g_snprintf(buf, sizeof(buf), cmdline, filepath);
2778         else {
2779                 if (cmdline)
2780                         g_warning("Open Text Editor command-line is invalid "
2781                                   "(there must be only one '%%s'): %s",
2782                                   cmdline);
2783                 g_snprintf(buf, sizeof(buf), DEFAULT_EDITOR_CMD, filepath);
2784         }
2785
2786         execute_command_line(buf, TRUE, NULL);
2787
2788         return 0;
2789 }
2790
2791 time_t remote_tzoffset_sec(const gchar *zone)
2792 {
2793         static gchar ustzstr[] = "PSTPDTMSTMDTCSTCDTESTEDT";
2794         gchar zone3[4];
2795         gchar *p;
2796         gchar c;
2797         gint iustz;
2798         gint offset;
2799         time_t remoteoffset;
2800
2801         strncpy(zone3, zone, 3);
2802         zone3[3] = '\0';
2803         remoteoffset = 0;
2804
2805         if (sscanf(zone, "%c%d", &c, &offset) == 2 &&
2806             (c == '+' || c == '-')) {
2807                 remoteoffset = ((offset / 100) * 60 + (offset % 100)) * 60;
2808                 if (c == '-')
2809                         remoteoffset = -remoteoffset;
2810         } else if (!strncmp(zone, "UT" , 2) ||
2811                    !strncmp(zone, "GMT", 3)) {
2812                 remoteoffset = 0;
2813         } else if (strlen(zone3) == 3) {
2814                 for (p = ustzstr; *p != '\0'; p += 3) {
2815                         if (!g_ascii_strncasecmp(p, zone3, 3)) {
2816                                 iustz = ((gint)(p - ustzstr) / 3 + 1) / 2 - 8;
2817                                 remoteoffset = iustz * 3600;
2818                                 break;
2819                         }
2820                 }
2821                 if (*p == '\0')
2822                         return -1;
2823         } else if (strlen(zone3) == 1) {
2824                 switch (zone[0]) {
2825                 case 'Z': remoteoffset =   0; break;
2826                 case 'A': remoteoffset =  -1; break;
2827                 case 'B': remoteoffset =  -2; break;
2828                 case 'C': remoteoffset =  -3; break;
2829                 case 'D': remoteoffset =  -4; break;
2830                 case 'E': remoteoffset =  -5; break;
2831                 case 'F': remoteoffset =  -6; break;
2832                 case 'G': remoteoffset =  -7; break;
2833                 case 'H': remoteoffset =  -8; break;
2834                 case 'I': remoteoffset =  -9; break;
2835                 case 'K': remoteoffset = -10; break; /* J is not used */
2836                 case 'L': remoteoffset = -11; break;
2837                 case 'M': remoteoffset = -12; break;
2838                 case 'N': remoteoffset =   1; break;
2839                 case 'O': remoteoffset =   2; break;
2840                 case 'P': remoteoffset =   3; break;
2841                 case 'Q': remoteoffset =   4; break;
2842                 case 'R': remoteoffset =   5; break;
2843                 case 'S': remoteoffset =   6; break;
2844                 case 'T': remoteoffset =   7; break;
2845                 case 'U': remoteoffset =   8; break;
2846                 case 'V': remoteoffset =   9; break;
2847                 case 'W': remoteoffset =  10; break;
2848                 case 'X': remoteoffset =  11; break;
2849                 case 'Y': remoteoffset =  12; break;
2850                 default:  remoteoffset =   0; break;
2851                 }
2852                 remoteoffset = remoteoffset * 3600;
2853         } else
2854                 return -1;
2855
2856         return remoteoffset;
2857 }
2858
2859 time_t tzoffset_sec(time_t *now)
2860 {
2861         struct tm gmt, *lt;
2862         gint off;
2863         struct tm buf1, buf2;
2864 #ifdef G_OS_WIN32
2865         if (now && *now < 0)
2866                 return 0;
2867 #endif
2868         gmt = *gmtime_r(now, &buf1);
2869         lt = localtime_r(now, &buf2);
2870
2871         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2872
2873         if (lt->tm_year < gmt.tm_year)
2874                 off -= 24 * 60;
2875         else if (lt->tm_year > gmt.tm_year)
2876                 off += 24 * 60;
2877         else if (lt->tm_yday < gmt.tm_yday)
2878                 off -= 24 * 60;
2879         else if (lt->tm_yday > gmt.tm_yday)
2880                 off += 24 * 60;
2881
2882         if (off >= 24 * 60)             /* should be impossible */
2883                 off = 23 * 60 + 59;     /* if not, insert silly value */
2884         if (off <= -24 * 60)
2885                 off = -(23 * 60 + 59);
2886
2887         return off * 60;
2888 }
2889
2890 /* calculate timezone offset */
2891 gchar *tzoffset(time_t *now)
2892 {
2893         static gchar offset_string[6];
2894         struct tm gmt, *lt;
2895         gint off;
2896         gchar sign = '+';
2897         struct tm buf1, buf2;
2898 #ifdef G_OS_WIN32
2899         if (now && *now < 0)
2900                 return 0;
2901 #endif
2902         gmt = *gmtime_r(now, &buf1);
2903         lt = localtime_r(now, &buf2);
2904
2905         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2906
2907         if (lt->tm_year < gmt.tm_year)
2908                 off -= 24 * 60;
2909         else if (lt->tm_year > gmt.tm_year)
2910                 off += 24 * 60;
2911         else if (lt->tm_yday < gmt.tm_yday)
2912                 off -= 24 * 60;
2913         else if (lt->tm_yday > gmt.tm_yday)
2914                 off += 24 * 60;
2915
2916         if (off < 0) {
2917                 sign = '-';
2918                 off = -off;
2919         }
2920
2921         if (off >= 24 * 60)             /* should be impossible */
2922                 off = 23 * 60 + 59;     /* if not, insert silly value */
2923
2924         sprintf(offset_string, "%c%02d%02d", sign, off / 60, off % 60);
2925
2926         return offset_string;
2927 }
2928
2929 static void _get_rfc822_date(gchar *buf, gint len, gboolean hidetz)
2930 {
2931         struct tm *lt;
2932         time_t t;
2933         gchar day[4], mon[4];
2934         gint dd, hh, mm, ss, yyyy;
2935         struct tm buf1;
2936         gchar buf2[RFC822_DATE_BUFFSIZE];
2937
2938         t = time(NULL);
2939         if (hidetz)
2940                 lt = gmtime_r(&t, &buf1);
2941         else
2942                 lt = localtime_r(&t, &buf1);
2943
2944         if (sscanf(asctime_r(lt, buf2), "%3s %3s %d %d:%d:%d %d\n",
2945                day, mon, &dd, &hh, &mm, &ss, &yyyy) != 7)
2946                 g_warning("failed reading date/time");
2947
2948         g_snprintf(buf, len, "%s, %d %s %d %02d:%02d:%02d %s",
2949                    day, dd, mon, yyyy, hh, mm, ss, (hidetz? "-0000": tzoffset(&t)));
2950 }
2951
2952 void get_rfc822_date(gchar *buf, gint len)
2953 {
2954         _get_rfc822_date(buf, len, FALSE);
2955 }
2956
2957 void get_rfc822_date_hide_tz(gchar *buf, gint len)
2958 {
2959         _get_rfc822_date(buf, len, TRUE);
2960 }
2961
2962 void debug_set_mode(gboolean mode)
2963 {
2964         debug_mode = mode;
2965 }
2966
2967 gboolean debug_get_mode(void)
2968 {
2969         return debug_mode;
2970 }
2971
2972 #ifdef HAVE_VA_OPT
2973 void debug_print_real(const char *file, int line, const gchar *format, ...)
2974 {
2975         va_list args;
2976         gchar buf[BUFFSIZE];
2977         gint prefix_len;
2978
2979         if (!debug_mode) return;
2980
2981         prefix_len = g_snprintf(buf, sizeof(buf), "%s:%d:", debug_srcname(file), line);
2982
2983         va_start(args, format);
2984         g_vsnprintf(buf + prefix_len, sizeof(buf) - prefix_len, format, args);
2985         va_end(args);
2986
2987         g_print("%s", buf);
2988 }
2989 #else
2990 void debug_print_real(const gchar *format, ...)
2991 {
2992         va_list args;
2993         gchar buf[BUFFSIZE];
2994
2995         if (!debug_mode) return;
2996
2997         va_start(args, format);
2998         g_vsnprintf(buf, sizeof(buf), format, args);
2999         va_end(args);
3000
3001         g_print("%s", buf);
3002 }
3003 #endif
3004
3005
3006 const char * debug_srcname(const char *file)
3007 {
3008         const char *s = strrchr (file, '/');
3009         return s? s+1:file;
3010 }
3011
3012
3013 void * subject_table_lookup(GHashTable *subject_table, gchar * subject)
3014 {
3015         if (subject == NULL)
3016                 subject = "";
3017         else
3018                 subject += subject_get_prefix_length(subject);
3019
3020         return g_hash_table_lookup(subject_table, subject);
3021 }
3022
3023 void subject_table_insert(GHashTable *subject_table, gchar * subject,
3024                           void * data)
3025 {
3026         if (subject == NULL || *subject == 0)
3027                 return;
3028         subject += subject_get_prefix_length(subject);
3029         g_hash_table_insert(subject_table, subject, data);
3030 }
3031
3032 void subject_table_remove(GHashTable *subject_table, gchar * subject)
3033 {
3034         if (subject == NULL)
3035                 return;
3036
3037         subject += subject_get_prefix_length(subject);
3038         g_hash_table_remove(subject_table, subject);
3039 }
3040
3041 static regex_t u_regex;
3042 static gboolean u_init_;
3043
3044 void utils_free_regex(void)
3045 {
3046         if (u_init_) {
3047                 regfree(&u_regex);
3048                 u_init_ = FALSE;
3049         }
3050 }
3051
3052 /*!
3053  *\brief        Check if a string is prefixed with known (combinations)
3054  *              of prefixes. The function assumes that each prefix
3055  *              is terminated by zero or exactly _one_ space.
3056  *
3057  *\param        str String to check for a prefixes
3058  *
3059  *\return       int Number of chars in the prefix that should be skipped
3060  *              for a "clean" subject line. If no prefix was found, 0
3061  *              is returned.
3062  */
3063 int subject_get_prefix_length(const gchar *subject)
3064 {
3065         /*!< Array with allowable reply prefixes regexps. */
3066         static const gchar * const prefixes[] = {
3067                 "Re\\:",                        /* "Re:" */
3068                 "Re\\[[1-9][0-9]*\\]\\:",       /* "Re[XXX]:" (non-conforming news mail clients) */
3069                 "Antw\\:",                      /* "Antw:" (Dutch / German Outlook) */
3070                 "Aw\\:",                        /* "Aw:"   (German) */
3071                 "Antwort\\:",                   /* "Antwort:" (German Lotus Notes) */
3072                 "Res\\:",                       /* "Res:" (Spanish/Brazilian Outlook) */
3073                 "Fw\\:",                        /* "Fw:" Forward */
3074                 "Fwd\\:",                       /* "Fwd:" Forward */
3075                 "Enc\\:",                       /* "Enc:" Forward (Brazilian Outlook) */
3076                 "Odp\\:",                       /* "Odp:" Re (Polish Outlook) */
3077                 "Rif\\:",                       /* "Rif:" (Italian Outlook) */
3078                 "Sv\\:",                        /* "Sv" (Norwegian) */
3079                 "Vs\\:",                        /* "Vs" (Norwegian) */
3080                 "Ad\\:",                        /* "Ad" (Norwegian) */
3081                 "\347\255\224\345\244\215\\:",  /* "Re" (Chinese, UTF-8) */
3082                 "R\303\251f\\. \\:",            /* "R�f. :" (French Lotus Notes) */
3083                 "Re \\:",                       /* "Re :" (French Yahoo Mail) */
3084                 /* add more */
3085         };
3086         const int PREFIXES = sizeof prefixes / sizeof prefixes[0];
3087         int n;
3088         regmatch_t pos;
3089
3090         if (!subject) return 0;
3091         if (!*subject) return 0;
3092
3093         if (!u_init_) {
3094                 GString *s = g_string_new("");
3095
3096                 for (n = 0; n < PREFIXES; n++)
3097                         /* Terminate each prefix regexpression by a
3098                          * "\ ?" (zero or ONE space), and OR them */
3099                         g_string_append_printf(s, "(%s\\ ?)%s",
3100                                           prefixes[n],
3101                                           n < PREFIXES - 1 ?
3102                                           "|" : "");
3103
3104                 g_string_prepend(s, "(");
3105                 g_string_append(s, ")+");       /* match at least once */
3106                 g_string_prepend(s, "^\\ *");   /* from beginning of line */
3107
3108
3109                 /* We now have something like "^\ *((PREFIX1\ ?)|(PREFIX2\ ?))+"
3110                  * TODO: Should this be       "^\ *(((PREFIX1)|(PREFIX2))\ ?)+" ??? */
3111                 if (regcomp(&u_regex, s->str, REG_EXTENDED | REG_ICASE)) {
3112                         debug_print("Error compiling regexp %s\n", s->str);
3113                         g_string_free(s, TRUE);
3114                         return 0;
3115                 } else {
3116                         u_init_ = TRUE;
3117                         g_string_free(s, TRUE);
3118                 }
3119         }
3120
3121         if (!regexec(&u_regex, subject, 1, &pos, 0) && pos.rm_so != -1)
3122                 return pos.rm_eo;
3123         else
3124                 return 0;
3125 }
3126
3127 static guint g_stricase_hash(gconstpointer gptr)
3128 {
3129         guint hash_result = 0;
3130         const char *str;
3131
3132         for (str = gptr; str && *str; str++) {
3133                 hash_result += toupper(*str);
3134         }
3135
3136         return hash_result;
3137 }
3138
3139 static gint g_stricase_equal(gconstpointer gptr1, gconstpointer gptr2)
3140 {
3141         const char *str1 = gptr1;
3142         const char *str2 = gptr2;
3143
3144         return !strcasecmp(str1, str2);
3145 }
3146
3147 gint g_int_compare(gconstpointer a, gconstpointer b)
3148 {
3149         return GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b);
3150 }
3151
3152 /*
3153    quote_cmd_argument()
3154
3155    return a quoted string safely usable in argument of a command.
3156
3157    code is extracted and adapted from etPan! project -- DINH V. Ho�.
3158 */
3159
3160 gint quote_cmd_argument(gchar * result, guint size,
3161                         const gchar * path)
3162 {
3163         const gchar * p;
3164         gchar * result_p;
3165         guint remaining;
3166
3167         result_p = result;
3168         remaining = size;
3169
3170         for(p = path ; * p != '\0' ; p ++) {
3171
3172                 if (isalnum((guchar)*p) || (* p == '/')) {
3173                         if (remaining > 0) {
3174                                 * result_p = * p;
3175                                 result_p ++;
3176                                 remaining --;
3177                         }
3178                         else {
3179                                 result[size - 1] = '\0';
3180                                 return -1;
3181                         }
3182                 }
3183                 else {
3184                         if (remaining >= 2) {
3185                                 * result_p = '\\';
3186                                 result_p ++;
3187                                 * result_p = * p;
3188                                 result_p ++;
3189                                 remaining -= 2;
3190                         }
3191                         else {
3192                                 result[size - 1] = '\0';
3193                                 return -1;
3194                         }
3195                 }
3196         }
3197         if (remaining > 0) {
3198                 * result_p = '\0';
3199         }
3200         else {
3201                 result[size - 1] = '\0';
3202                 return -1;
3203         }
3204
3205         return 0;
3206 }
3207
3208 typedef struct
3209 {
3210         GNode           *parent;
3211         GNodeMapFunc     func;
3212         gpointer         data;
3213 } GNodeMapData;
3214
3215 static void g_node_map_recursive(GNode *node, gpointer data)
3216 {
3217         GNodeMapData *mapdata = (GNodeMapData *) data;
3218         GNode *newnode;
3219         GNodeMapData newmapdata;
3220         gpointer newdata;
3221
3222         newdata = mapdata->func(node->data, mapdata->data);
3223         if (newdata != NULL) {
3224                 newnode = g_node_new(newdata);
3225                 g_node_append(mapdata->parent, newnode);
3226
3227                 newmapdata.parent = newnode;
3228                 newmapdata.func = mapdata->func;
3229                 newmapdata.data = mapdata->data;
3230
3231                 g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &newmapdata);
3232         }
3233 }
3234
3235 GNode *g_node_map(GNode *node, GNodeMapFunc func, gpointer data)
3236 {
3237         GNode *root;
3238         GNodeMapData mapdata;
3239
3240         cm_return_val_if_fail(node != NULL, NULL);
3241         cm_return_val_if_fail(func != NULL, NULL);
3242
3243         root = g_node_new(func(node->data, data));
3244
3245         mapdata.parent = root;
3246         mapdata.func = func;
3247         mapdata.data = data;
3248
3249         g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &mapdata);
3250
3251         return root;
3252 }
3253
3254 #define HEX_TO_INT(val, hex)                    \
3255 {                                               \
3256         gchar c = hex;                          \
3257                                                 \
3258         if ('0' <= c && c <= '9') {             \
3259                 val = c - '0';                  \
3260         } else if ('a' <= c && c <= 'f') {      \
3261                 val = c - 'a' + 10;             \
3262         } else if ('A' <= c && c <= 'F') {      \
3263                 val = c - 'A' + 10;             \
3264         } else {                                \
3265                 val = -1;                       \
3266         }                                       \
3267 }
3268
3269 gboolean get_hex_value(guchar *out, gchar c1, gchar c2)
3270 {
3271         gint hi, lo;
3272
3273         HEX_TO_INT(hi, c1);
3274         HEX_TO_INT(lo, c2);
3275
3276         if (hi == -1 || lo == -1)
3277                 return FALSE;
3278
3279         *out = (hi << 4) + lo;
3280         return TRUE;
3281 }
3282
3283 #define INT_TO_HEX(hex, val)            \
3284 {                                       \
3285         if ((val) < 10)                 \
3286                 hex = '0' + (val);      \
3287         else                            \
3288                 hex = 'A' + (val) - 10; \
3289 }
3290
3291 void get_hex_str(gchar *out, guchar ch)
3292 {
3293         gchar hex;
3294
3295         INT_TO_HEX(hex, ch >> 4);
3296         *out++ = hex;
3297         INT_TO_HEX(hex, ch & 0x0f);
3298         *out   = hex;
3299 }
3300
3301 #undef REF_DEBUG
3302 #ifndef REF_DEBUG
3303 #define G_PRINT_REF 1 == 1 ? (void) 0 : (void)
3304 #else
3305 #define G_PRINT_REF g_print
3306 #endif
3307
3308 /*!
3309  *\brief        Register ref counted pointer. It is based on GBoxed, so should
3310  *              work with anything that uses the GType system. The semantics
3311  *              are similar to a C++ auto pointer, with the exception that
3312  *              C doesn't have automatic closure (calling destructors) when
3313  *              exiting a block scope.
3314  *              Use the \ref G_TYPE_AUTO_POINTER macro instead of calling this
3315  *              function directly.
3316  *
3317  *\return       GType A GType type.
3318  */
3319 GType g_auto_pointer_register(void)
3320 {
3321         static GType auto_pointer_type;
3322         if (!auto_pointer_type)
3323                 auto_pointer_type =
3324                         g_boxed_type_register_static
3325                                 ("G_TYPE_AUTO_POINTER",
3326                                  (GBoxedCopyFunc) g_auto_pointer_copy,
3327                                  (GBoxedFreeFunc) g_auto_pointer_free);
3328         return auto_pointer_type;
3329 }
3330
3331 /*!
3332  *\brief        Structure with g_new() allocated pointer guarded by the
3333  *              auto pointer
3334  */
3335 typedef struct AutoPointerRef {
3336         void          (*free) (gpointer);
3337         gpointer        pointer;
3338         glong           cnt;
3339 } AutoPointerRef;
3340
3341 /*!
3342  *\brief        The auto pointer opaque structure that references the
3343  *              pointer guard block.
3344  */
3345 typedef struct AutoPointer {
3346         AutoPointerRef *ref;
3347         gpointer        ptr; /*!< access to protected pointer */
3348 } AutoPointer;
3349
3350 /*!
3351  *\brief        Creates an auto pointer for a g_new()ed pointer. Example:
3352  *
3353  *\code
3354  *
3355  *              ... tell gtk_list_store it should use a G_TYPE_AUTO_POINTER
3356  *              ... when assigning, copying and freeing storage elements
3357  *
3358  *              gtk_list_store_new(N_S_COLUMNS,
3359  *                                 G_TYPE_AUTO_POINTER,
3360  *                                 -1);
3361  *
3362  *
3363  *              Template *precious_data = g_new0(Template, 1);
3364  *              g_pointer protect = g_auto_pointer_new(precious_data);
3365  *
3366  *              gtk_list_store_set(container, &iter,
3367  *                                 S_DATA, protect,
3368  *                                 -1);
3369  *
3370  *              ... the gtk_list_store has copied the pointer and
3371  *              ... incremented its reference count, we should free
3372  *              ... the auto pointer (in C++ a destructor would do
3373  *              ... this for us when leaving block scope)
3374  *
3375  *              g_auto_pointer_free(protect);
3376  *
3377  *              ... gtk_list_store_set() now manages the data. When
3378  *              ... *explicitly* requesting a pointer from the list
3379  *              ... store, don't forget you get a copy that should be
3380  *              ... freed with g_auto_pointer_free() eventually.
3381  *
3382  *\endcode
3383  *
3384  *\param        pointer Pointer to be guarded.
3385  *
3386  *\return       GAuto * Pointer that should be used in containers with
3387  *              GType support.
3388  */
3389 GAuto *g_auto_pointer_new(gpointer p)
3390 {
3391         AutoPointerRef *ref;
3392         AutoPointer    *ptr;
3393
3394         if (p == NULL)
3395                 return NULL;
3396
3397         ref = g_new0(AutoPointerRef, 1);
3398         ptr = g_new0(AutoPointer, 1);
3399
3400         ref->pointer = p;
3401         ref->free = g_free;
3402         ref->cnt = 1;
3403
3404         ptr->ref = ref;
3405         ptr->ptr = p;
3406
3407 #ifdef REF_DEBUG
3408         G_PRINT_REF ("XXXX ALLOC(%lx)\n", p);
3409 #endif
3410         return ptr;
3411 }
3412
3413 /*!
3414  *\brief        Allocate an autopointer using the passed \a free function to
3415  *              free the guarded pointer
3416  */
3417 GAuto *g_auto_pointer_new_with_free(gpointer p, GFreeFunc free_)
3418 {
3419         AutoPointer *aptr;
3420
3421         if (p == NULL)
3422                 return NULL;
3423
3424         aptr = g_auto_pointer_new(p);
3425         aptr->ref->free = free_;
3426         return aptr;
3427 }
3428
3429 gpointer g_auto_pointer_get_ptr(GAuto *auto_ptr)
3430 {
3431         if (auto_ptr == NULL)
3432                 return NULL;
3433         return ((AutoPointer *) auto_ptr)->ptr;
3434 }
3435
3436 /*!
3437  *\brief        Copies an auto pointer by. It's mostly not necessary
3438  *              to call this function directly, unless you copy/assign
3439  *              the guarded pointer.
3440  *
3441  *\param        auto_ptr Auto pointer returned by previous call to
3442  *              g_auto_pointer_new_XXX()
3443  *
3444  *\return       gpointer An auto pointer
3445  */
3446 GAuto *g_auto_pointer_copy(GAuto *auto_ptr)
3447 {
3448         AutoPointer     *ptr;
3449         AutoPointerRef  *ref;
3450         AutoPointer     *newp;
3451
3452         if (auto_ptr == NULL)
3453                 return NULL;
3454
3455         ptr = auto_ptr;
3456         ref = ptr->ref;
3457         newp = g_new0(AutoPointer, 1);
3458
3459         newp->ref = ref;
3460         newp->ptr = ref->pointer;
3461         ++(ref->cnt);
3462
3463 #ifdef REF_DEBUG
3464         G_PRINT_REF ("XXXX COPY(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3465 #endif
3466         return newp;
3467 }
3468
3469 /*!
3470  *\brief        Free an auto pointer
3471  */
3472 void g_auto_pointer_free(GAuto *auto_ptr)
3473 {
3474         AutoPointer     *ptr;
3475         AutoPointerRef  *ref;
3476
3477         if (auto_ptr == NULL)
3478                 return;
3479
3480         ptr = auto_ptr;
3481         ref = ptr->ref;
3482
3483         if (--(ref->cnt) == 0) {
3484 #ifdef REF_DEBUG
3485                 G_PRINT_REF ("XXXX FREE(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3486 #endif
3487                 ref->free(ref->pointer);
3488                 g_free(ref);
3489         }
3490 #ifdef REF_DEBUG
3491         else
3492                 G_PRINT_REF ("XXXX DEREF(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3493 #endif
3494         g_free(ptr);
3495 }
3496
3497 /* get_uri_part() - retrieves a URI starting from scanpos.
3498                     Returns TRUE if successful */
3499 gboolean get_uri_part(const gchar *start, const gchar *scanpos,
3500                              const gchar **bp, const gchar **ep, gboolean hdr)
3501 {
3502         const gchar *ep_;
3503         gint parenthese_cnt = 0;
3504
3505         cm_return_val_if_fail(start != NULL, FALSE);
3506         cm_return_val_if_fail(scanpos != NULL, FALSE);
3507         cm_return_val_if_fail(bp != NULL, FALSE);
3508         cm_return_val_if_fail(ep != NULL, FALSE);
3509
3510         *bp = scanpos;
3511
3512         /* find end point of URI */
3513         for (ep_ = scanpos; *ep_ != '\0'; ep_ = g_utf8_next_char(ep_)) {
3514                 gunichar u = g_utf8_get_char_validated(ep_, -1);
3515                 if (!g_unichar_isgraph(u) ||
3516                     u == (gunichar)-1 ||
3517                     strchr("[]{}<>\"", *ep_)) {
3518                         break;
3519                 } else if (strchr("(", *ep_)) {
3520                         parenthese_cnt++;
3521                 } else if (strchr(")", *ep_)) {
3522                         if (parenthese_cnt > 0)
3523                                 parenthese_cnt--;
3524                         else
3525                                 break;
3526                 }
3527         }
3528
3529         /* no punctuation at end of string */
3530
3531         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
3532          * should pass some URI type to this function and decide on that whether
3533          * to perform punctuation stripping */
3534
3535 #define IS_REAL_PUNCT(ch)       (g_ascii_ispunct(ch) && !strchr("/?=-_~)", ch))
3536
3537         for (; ep_ - 1 > scanpos + 1 &&
3538                IS_REAL_PUNCT(*(ep_ - 1));
3539              ep_--)
3540                 ;
3541
3542 #undef IS_REAL_PUNCT
3543
3544         *ep = ep_;
3545
3546         return TRUE;
3547 }
3548
3549 gchar *make_uri_string(const gchar *bp, const gchar *ep)
3550 {
3551         while (bp && *bp && g_ascii_isspace(*bp))
3552                 bp++;
3553         return g_strndup(bp, ep - bp);
3554 }
3555
3556 /* valid mail address characters */
3557 #define IS_RFC822_CHAR(ch) \
3558         (IS_ASCII(ch) && \
3559          (ch) > 32   && \
3560          (ch) != 127 && \
3561          !g_ascii_isspace(ch) && \
3562          !strchr("(),;<>\"", (ch)))
3563
3564 /* alphabet and number within 7bit ASCII */
3565 #define IS_ASCII_ALNUM(ch)      (IS_ASCII(ch) && g_ascii_isalnum(ch))
3566 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
3567
3568 static GHashTable *create_domain_tab(void)
3569 {
3570         gint n;
3571         GHashTable *htab = g_hash_table_new(g_stricase_hash, g_stricase_equal);
3572
3573         cm_return_val_if_fail(htab, NULL);
3574         for (n = 0; n < sizeof toplvl_domains / sizeof toplvl_domains[0]; n++)
3575                 g_hash_table_insert(htab, (gpointer) toplvl_domains[n], (gpointer) toplvl_domains[n]);
3576         return htab;
3577 }
3578
3579 static gboolean is_toplvl_domain(GHashTable *tab, const gchar *first, const gchar *last)
3580 {
3581         gchar buf[BUFFSIZE + 1];
3582         const gchar *m = buf + BUFFSIZE + 1;
3583         register gchar *p;
3584
3585         if (last - first > BUFFSIZE || first > last)
3586                 return FALSE;
3587
3588         for (p = buf; p < m &&  first < last; *p++ = *first++)
3589                 ;
3590         *p = 0;
3591
3592         return g_hash_table_lookup(tab, buf) != NULL;
3593 }
3594
3595 /* get_email_part() - retrieves an email address. Returns TRUE if successful */
3596 gboolean get_email_part(const gchar *start, const gchar *scanpos,
3597                                const gchar **bp, const gchar **ep, gboolean hdr)
3598 {
3599         /* more complex than the uri part because we need to scan back and forward starting from
3600          * the scan position. */
3601         gboolean result = FALSE;
3602         const gchar *bp_ = NULL;
3603         const gchar *ep_ = NULL;
3604         static GHashTable *dom_tab;
3605         const gchar *last_dot = NULL;
3606         const gchar *prelast_dot = NULL;
3607         const gchar *last_tld_char = NULL;
3608
3609         /* the informative part of the email address (describing the name
3610          * of the email address owner) may contain quoted parts. the
3611          * closure stack stores the last encountered quotes. */
3612         gchar closure_stack[128];
3613         gchar *ptr = closure_stack;
3614
3615         cm_return_val_if_fail(start != NULL, FALSE);
3616         cm_return_val_if_fail(scanpos != NULL, FALSE);
3617         cm_return_val_if_fail(bp != NULL, FALSE);
3618         cm_return_val_if_fail(ep != NULL, FALSE);
3619
3620         if (hdr) {
3621                 const gchar *start_quote = NULL;
3622                 const gchar *end_quote = NULL;
3623 search_again:
3624                 /* go to the real start */
3625                 if (start[0] == ',')
3626                         start++;
3627                 if (start[0] == ';')
3628                         start++;
3629                 while (start[0] == '\n' || start[0] == '\r')
3630                         start++;
3631                 while (start[0] == ' ' || start[0] == '\t')
3632                         start++;
3633
3634                 *bp = start;
3635
3636                 /* check if there are quotes (to skip , in them) */
3637                 if (*start == '"') {
3638                         start_quote = start;
3639                         start++;
3640                         end_quote = strstr(start, "\"");
3641                 } else {
3642                         start_quote = NULL;
3643                         end_quote = NULL;
3644                 }
3645
3646                 /* skip anything between quotes */
3647                 if (start_quote && end_quote) {
3648                         start = end_quote;
3649
3650                 }
3651
3652                 /* find end (either , or ; or end of line) */
3653                 if (strstr(start, ",") && strstr(start, ";"))
3654                         *ep = strstr(start,",") < strstr(start, ";")
3655                                 ? strstr(start, ",") : strstr(start, ";");
3656                 else if (strstr(start, ","))
3657                         *ep = strstr(start, ",");
3658                 else if (strstr(start, ";"))
3659                         *ep = strstr(start, ";");
3660                 else
3661                         *ep = start+strlen(start);
3662
3663                 /* go back to real start */
3664                 if (start_quote && end_quote) {
3665                         start = start_quote;
3666                 }
3667
3668                 /* check there's still an @ in that, or search
3669                  * further if possible */
3670                 if (strstr(start, "@") && strstr(start, "@") < *ep)
3671                         return TRUE;
3672                 else if (*ep < start+strlen(start)) {
3673                         start = *ep;
3674                         goto search_again;
3675                 } else if (start_quote && strstr(start, "\"") && strstr(start, "\"") < *ep) {
3676                         *bp = start_quote;
3677                         return TRUE;
3678                 } else
3679                         return FALSE;
3680         }
3681
3682         if (!dom_tab)
3683                 dom_tab = create_domain_tab();
3684         cm_return_val_if_fail(dom_tab, FALSE);
3685
3686         /* scan start of address */
3687         for (bp_ = scanpos - 1;
3688              bp_ >= start && IS_RFC822_CHAR(*(const guchar *)bp_); bp_--)
3689                 ;
3690
3691         /* TODO: should start with an alnum? */
3692         bp_++;
3693         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*(const guchar *)bp_); bp_++)
3694                 ;
3695
3696         if (bp_ != scanpos) {
3697                 /* scan end of address */
3698                 for (ep_ = scanpos + 1;
3699                      *ep_ && IS_RFC822_CHAR(*(const guchar *)ep_); ep_++)
3700                         if (*ep_ == '.') {
3701                                 prelast_dot = last_dot;
3702                                 last_dot = ep_;
3703                                 if (*(last_dot + 1) == '.') {
3704                                         if (prelast_dot == NULL)
3705                                                 return FALSE;
3706                                         last_dot = prelast_dot;
3707                                         break;
3708                                 }
3709                         }
3710
3711                 /* TODO: really should terminate with an alnum? */
3712                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*(const guchar *)ep_);
3713                      --ep_)
3714                         ;
3715                 ep_++;
3716
3717                 if (last_dot == NULL)
3718                         return FALSE;
3719                 if (last_dot >= ep_)
3720                         last_dot = prelast_dot;
3721                 if (last_dot == NULL || (scanpos + 1 >= last_dot))
3722                         return FALSE;
3723                 last_dot++;
3724
3725                 for (last_tld_char = last_dot; last_tld_char < ep_; last_tld_char++)
3726                         if (*last_tld_char == '?')
3727                                 break;
3728
3729                 if (is_toplvl_domain(dom_tab, last_dot, last_tld_char))
3730                         result = TRUE;
3731
3732                 *ep = ep_;
3733                 *bp = bp_;
3734         }
3735
3736         if (!result) return FALSE;
3737
3738         if (*ep_ && bp_ != start && *(bp_ - 1) == '"' && *(ep_) == '"'
3739         && *(ep_ + 1) == ' ' && *(ep_ + 2) == '<'
3740         && IS_RFC822_CHAR(*(ep_ + 3))) {
3741                 /* this informative part with an @ in it is
3742                  * followed by the email address */
3743                 ep_ += 3;
3744
3745                 /* go to matching '>' (or next non-rfc822 char, like \n) */
3746                 for (; *ep_ != '>' && *ep_ != '\0' && IS_RFC822_CHAR(*ep_); ep_++)
3747                         ;
3748
3749                 /* include the bracket */
3750                 if (*ep_ == '>') ep_++;
3751
3752                 /* include the leading quote */
3753                 bp_--;
3754
3755                 *ep = ep_;
3756                 *bp = bp_;
3757                 return TRUE;
3758         }
3759
3760         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
3761         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
3762                 return FALSE;
3763
3764         /* see if this is <bracketed>; in this case we also scan for the informative part. */
3765         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
3766                 return TRUE;
3767
3768 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
3769 #define IN_STACK()      (ptr > closure_stack)
3770 /* has underrun check */
3771 #define POP_STACK()     if(IN_STACK()) --ptr
3772 /* has overrun check */
3773 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
3774 /* has underrun check */
3775 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
3776
3777         ep_++;
3778
3779         /* scan for the informative part. */
3780         for (bp_ -= 2; bp_ >= start; bp_--) {
3781                 /* if closure on the stack keep scanning */
3782                 if (PEEK_STACK() == *bp_) {
3783                         POP_STACK();
3784                         continue;
3785                 }
3786                 if (!IN_STACK() && (*bp_ == '\'' || *bp_ == '"')) {
3787                         PUSH_STACK(*bp_);
3788                         continue;
3789                 }
3790
3791                 /* if nothing in the closure stack, do the special conditions
3792                  * the following if..else expression simply checks whether
3793                  * a token is acceptable. if not acceptable, the clause
3794                  * should terminate the loop with a 'break' */
3795                 if (!PEEK_STACK()) {
3796                         if (*bp_ == '-'
3797                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
3798                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
3799                                 /* hyphens are allowed, but only in
3800                                    between alnums */
3801                         } else if (strchr(" \"'", *bp_)) {
3802                                 /* but anything not being a punctiation
3803                                    is ok */
3804                         } else {
3805                                 break; /* anything else is rejected */
3806                         }
3807                 }
3808         }
3809
3810         bp_++;
3811
3812         /* scan forward (should start with an alnum) */
3813         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
3814                 ;
3815 #undef PEEK_STACK
3816 #undef PUSH_STACK
3817 #undef POP_STACK
3818 #undef IN_STACK
3819 #undef FULL_STACK
3820
3821
3822         *bp = bp_;
3823         *ep = ep_;
3824
3825         return result;
3826 }
3827
3828 #undef IS_QUOTE
3829 #undef IS_ASCII_ALNUM
3830 #undef IS_RFC822_CHAR
3831
3832 gchar *make_email_string(const gchar *bp, const gchar *ep)
3833 {
3834         /* returns a mailto: URI; mailto: is also used to detect the
3835          * uri type later on in the button_pressed signal handler */
3836         gchar *tmp;
3837         gchar *result;
3838         gchar *colon, *at;
3839
3840         tmp = g_strndup(bp, ep - bp);
3841
3842         /* If there is a colon in the username part of the address,
3843          * we're dealing with an URI for some other protocol - do
3844          * not prefix with mailto: in such case. */
3845         colon = strchr(tmp, ':');
3846         at = strchr(tmp, '@');
3847         if (colon != NULL && at != NULL && colon < at) {
3848                 result = tmp;
3849         } else {
3850                 result = g_strconcat("mailto:", tmp, NULL);
3851                 g_free(tmp);
3852         }
3853
3854         return result;
3855 }
3856
3857 gchar *make_http_string(const gchar *bp, const gchar *ep)
3858 {
3859         /* returns an http: URI; */
3860         gchar *tmp;
3861         gchar *result;
3862
3863         while (bp && *bp && g_ascii_isspace(*bp))
3864                 bp++;
3865         tmp = g_strndup(bp, ep - bp);
3866         result = g_strconcat("http://", tmp, NULL);
3867         g_free(tmp);
3868
3869         return result;
3870 }
3871
3872 static gchar *mailcap_get_command_in_file(const gchar *path, const gchar *type, const gchar *file_to_open)
3873 {
3874         FILE *fp = claws_fopen(path, "rb");
3875         gchar buf[BUFFSIZE];
3876         gchar *result = NULL;
3877         if (!fp)
3878                 return NULL;
3879         while (claws_fgets(buf, sizeof (buf), fp) != NULL) {
3880                 gchar **parts = g_strsplit(buf, ";", 3);
3881                 gchar *trimmed = parts[0];
3882                 while (trimmed[0] == ' ' || trimmed[0] == '\t')
3883                         trimmed++;
3884                 while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
3885                         trimmed[strlen(trimmed)-1] = '\0';
3886
3887                 if (!strcmp(trimmed, type)) {
3888                         gboolean needsterminal = FALSE;
3889                         if (parts[2] && strstr(parts[2], "needsterminal")) {
3890                                 needsterminal = TRUE;
3891                         }
3892                         if (parts[2] && strstr(parts[2], "test=")) {
3893                                 gchar *orig_testcmd = g_strdup(strstr(parts[2], "test=")+5);
3894                                 gchar *testcmd = orig_testcmd;
3895                                 if (strstr(testcmd,";"))
3896                                         *(strstr(testcmd,";")) = '\0';
3897                                 while (testcmd[0] == ' ' || testcmd[0] == '\t')
3898                                         testcmd++;
3899                                 while (testcmd[strlen(testcmd)-1] == '\n')
3900                                         testcmd[strlen(testcmd)-1] = '\0';
3901                                 while (testcmd[strlen(testcmd)-1] == '\r')
3902                                         testcmd[strlen(testcmd)-1] = '\0';
3903                                 while (testcmd[strlen(testcmd)-1] == ' ' || testcmd[strlen(testcmd)-1] == '\t')
3904                                         testcmd[strlen(testcmd)-1] = '\0';
3905
3906                                 if (strstr(testcmd, "%s")) {
3907                                         gchar *tmp = g_strdup_printf(testcmd, file_to_open);
3908                                         gint res = system(tmp);
3909                                         g_free(tmp);
3910                                         g_free(orig_testcmd);
3911
3912                                         if (res != 0) {
3913                                                 g_strfreev(parts);
3914                                                 continue;
3915                                         }
3916                                 } else {
3917                                         gint res = system(testcmd);
3918                                         g_free(orig_testcmd);
3919
3920                                         if (res != 0) {
3921                                                 g_strfreev(parts);
3922                                                 continue;
3923                                         }
3924                                 }
3925                         }
3926
3927                         trimmed = parts[1];
3928                         while (trimmed[0] == ' ' || trimmed[0] == '\t')
3929                                 trimmed++;
3930                         while (trimmed[strlen(trimmed)-1] == '\n')
3931                                 trimmed[strlen(trimmed)-1] = '\0';
3932                         while (trimmed[strlen(trimmed)-1] == '\r')
3933                                 trimmed[strlen(trimmed)-1] = '\0';
3934                         while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
3935                                 trimmed[strlen(trimmed)-1] = '\0';
3936                         result = g_strdup(trimmed);
3937                         g_strfreev(parts);
3938                         claws_fclose(fp);
3939                         if (needsterminal) {
3940                                 gchar *tmp = g_strdup_printf("xterm -e %s", result);
3941                                 g_free(result);
3942                                 result = tmp;
3943                         }
3944                         return result;
3945                 }
3946                 g_strfreev(parts);
3947         }
3948         claws_fclose(fp);
3949         return NULL;
3950 }
3951 gchar *mailcap_get_command_for_type(const gchar *type, const gchar *file_to_open)
3952 {
3953         gchar *result = NULL;
3954         gchar *path = NULL;
3955         if (type == NULL)
3956                 return NULL;
3957         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
3958         result = mailcap_get_command_in_file(path, type, file_to_open);
3959         g_free(path);
3960         if (result)
3961                 return result;
3962         result = mailcap_get_command_in_file("/etc/mailcap", type, file_to_open);
3963         return result;
3964 }
3965
3966 void mailcap_update_default(const gchar *type, const gchar *command)
3967 {
3968         gchar *path = NULL, *outpath = NULL;
3969         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
3970         outpath = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap.new", NULL);
3971         FILE *fp = claws_fopen(path, "rb");
3972         FILE *outfp = NULL;
3973         gchar buf[BUFFSIZE];
3974         gboolean err = FALSE;
3975
3976         if (!fp) {
3977                 fp = claws_fopen(path, "a");
3978                 if (!fp) {
3979                         g_warning("failed to create file %s", path);
3980                         g_free(path);
3981                         g_free(outpath);
3982                         return;
3983                 }
3984                 fp = g_freopen(path, "rb", fp);
3985                 if (!fp) {
3986                         g_warning("failed to reopen file %s", path);
3987                         g_free(path);
3988                         g_free(outpath);
3989                         return;
3990                 }
3991         }
3992
3993         outfp = claws_fopen(outpath, "wb");
3994         if (!outfp) {
3995                 g_warning("failed to create file %s", outpath);
3996                 g_free(path);
3997                 g_free(outpath);
3998                 claws_fclose(fp);
3999                 return;
4000         }
4001         while (fp && claws_fgets(buf, sizeof (buf), fp) != NULL) {
4002                 gchar **parts = g_strsplit(buf, ";", 3);
4003                 gchar *trimmed = parts[0];
4004                 while (trimmed[0] == ' ')
4005                         trimmed++;
4006                 while (trimmed[strlen(trimmed)-1] == ' ')
4007                         trimmed[strlen(trimmed)-1] = '\0';
4008
4009                 if (!strcmp(trimmed, type)) {
4010                         g_strfreev(parts);
4011                         continue;
4012                 }
4013                 else {
4014                         if(claws_fputs(buf, outfp) == EOF) {
4015                                 err = TRUE;
4016                                 g_strfreev(parts);
4017                                 break;
4018                         }
4019                 }
4020                 g_strfreev(parts);
4021         }
4022         if (fprintf(outfp, "%s; %s\n", type, command) < 0)
4023                 err = TRUE;
4024
4025         if (fp)
4026                 claws_fclose(fp);
4027
4028         if (claws_safe_fclose(outfp) == EOF)
4029                 err = TRUE;
4030
4031         if (!err)
4032                 g_rename(outpath, path);
4033
4034         g_free(path);
4035         g_free(outpath);
4036 }
4037
4038 /* crude test to see if a file is an email. */
4039 gboolean file_is_email (const gchar *filename)
4040 {
4041         FILE *fp = NULL;
4042         gchar buffer[2048];
4043         gint score = 0;
4044         if (filename == NULL)
4045                 return FALSE;
4046         if ((fp = claws_fopen(filename, "rb")) == NULL)
4047                 return FALSE;
4048         while (score < 3
4049                && claws_fgets(buffer, sizeof (buffer), fp) != NULL) {
4050                 if (!strncmp(buffer, "From:", strlen("From:")))
4051                         score++;
4052                 else if (!strncmp(buffer, "Date:", strlen("Date:")))
4053                         score++;
4054                 else if (!strncmp(buffer, "Message-ID:", strlen("Message-ID:")))
4055                         score++;
4056                 else if (!strncmp(buffer, "Subject:", strlen("Subject:")))
4057                         score++;
4058                 else if (!strcmp(buffer, "\r\n")) {
4059                         debug_print("End of headers\n");
4060                         break;
4061                 }
4062         }
4063         claws_fclose(fp);
4064         return (score >= 3);
4065 }
4066
4067 gboolean sc_g_list_bigger(GList *list, gint max)
4068 {
4069         GList *cur = list;
4070         int i = 0;
4071         while (cur && i <= max+1) {
4072                 i++;
4073                 cur = cur->next;
4074         }
4075         return (i > max);
4076 }
4077
4078 gboolean sc_g_slist_bigger(GSList *list, gint max)
4079 {
4080         GSList *cur = list;
4081         int i = 0;
4082         while (cur && i <= max+1) {
4083                 i++;
4084                 cur = cur->next;
4085         }
4086         return (i > max);
4087 }
4088
4089 const gchar *daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4090 const gchar *monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4091                              NULL, NULL, NULL, NULL, NULL, NULL};
4092 const gchar *s_daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4093 const gchar *s_monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4094                              NULL, NULL, NULL, NULL, NULL, NULL};
4095
4096 gint daynames_len[] =     {0,0,0,0,0,0,0};
4097 gint monthnames_len[] =   {0,0,0,0,0,0,
4098                                  0,0,0,0,0,0};
4099 gint s_daynames_len[] =   {0,0,0,0,0,0,0};
4100 gint s_monthnames_len[] = {0,0,0,0,0,0,
4101                                  0,0,0,0,0,0};
4102 const gchar *s_am_up = NULL;
4103 const gchar *s_pm_up = NULL;
4104 const gchar *s_am_low = NULL;
4105 const gchar *s_pm_low = NULL;
4106
4107 gint s_am_up_len = 0;
4108 gint s_pm_up_len = 0;
4109 gint s_am_low_len = 0;
4110 gint s_pm_low_len = 0;
4111
4112 static gboolean time_names_init_done = FALSE;
4113
4114 static void init_time_names(void)
4115 {
4116         int i = 0;
4117
4118         daynames[0] = C_("Complete day name for use by strftime", "Sunday");
4119         daynames[1] = C_("Complete day name for use by strftime", "Monday");
4120         daynames[2] = C_("Complete day name for use by strftime", "Tuesday");
4121         daynames[3] = C_("Complete day name for use by strftime", "Wednesday");
4122         daynames[4] = C_("Complete day name for use by strftime", "Thursday");
4123         daynames[5] = C_("Complete day name for use by strftime", "Friday");
4124         daynames[6] = C_("Complete day name for use by strftime", "Saturday");
4125
4126         monthnames[0] = C_("Complete month name for use by strftime", "January");
4127         monthnames[1] = C_("Complete month name for use by strftime", "February");
4128         monthnames[2] = C_("Complete month name for use by strftime", "March");
4129         monthnames[3] = C_("Complete month name for use by strftime", "April");
4130         monthnames[4] = C_("Complete month name for use by strftime", "May");
4131         monthnames[5] = C_("Complete month name for use by strftime", "June");
4132         monthnames[6] = C_("Complete month name for use by strftime", "July");
4133         monthnames[7] = C_("Complete month name for use by strftime", "August");
4134         monthnames[8] = C_("Complete month name for use by strftime", "September");
4135         monthnames[9] = C_("Complete month name for use by strftime", "October");
4136         monthnames[10] = C_("Complete month name for use by strftime", "November");
4137         monthnames[11] = C_("Complete month name for use by strftime", "December");
4138
4139         s_daynames[0] = C_("Abbr. day name for use by strftime", "Sun");
4140         s_daynames[1] = C_("Abbr. day name for use by strftime", "Mon");
4141         s_daynames[2] = C_("Abbr. day name for use by strftime", "Tue");
4142         s_daynames[3] = C_("Abbr. day name for use by strftime", "Wed");
4143         s_daynames[4] = C_("Abbr. day name for use by strftime", "Thu");
4144         s_daynames[5] = C_("Abbr. day name for use by strftime", "Fri");
4145         s_daynames[6] = C_("Abbr. day name for use by strftime", "Sat");
4146
4147         s_monthnames[0] = C_("Abbr. month name for use by strftime", "Jan");
4148         s_monthnames[1] = C_("Abbr. month name for use by strftime", "Feb");
4149         s_monthnames[2] = C_("Abbr. month name for use by strftime", "Mar");
4150         s_monthnames[3] = C_("Abbr. month name for use by strftime", "Apr");
4151         s_monthnames[4] = C_("Abbr. month name for use by strftime", "May");
4152         s_monthnames[5] = C_("Abbr. month name for use by strftime", "Jun");
4153         s_monthnames[6] = C_("Abbr. month name for use by strftime", "Jul");
4154         s_monthnames[7] = C_("Abbr. month name for use by strftime", "Aug");
4155         s_monthnames[8] = C_("Abbr. month name for use by strftime", "Sep");
4156         s_monthnames[9] = C_("Abbr. month name for use by strftime", "Oct");
4157         s_monthnames[10] = C_("Abbr. month name for use by strftime", "Nov");
4158         s_monthnames[11] = C_("Abbr. month name for use by strftime", "Dec");
4159
4160         for (i = 0; i < 7; i++) {
4161                 daynames_len[i] = strlen(daynames[i]);
4162                 s_daynames_len[i] = strlen(s_daynames[i]);
4163         }
4164         for (i = 0; i < 12; i++) {
4165                 monthnames_len[i] = strlen(monthnames[i]);
4166                 s_monthnames_len[i] = strlen(s_monthnames[i]);
4167         }
4168
4169         s_am_up = C_("For use by strftime (morning)", "AM");
4170         s_pm_up = C_("For use by strftime (afternoon)", "PM");
4171         s_am_low = C_("For use by strftime (morning, lowercase)", "am");
4172         s_pm_low = C_("For use by strftime (afternoon, lowercase)", "pm");
4173
4174         s_am_up_len = strlen(s_am_up);
4175         s_pm_up_len = strlen(s_pm_up);
4176         s_am_low_len = strlen(s_am_low);
4177         s_pm_low_len = strlen(s_pm_low);
4178
4179         time_names_init_done = TRUE;
4180 }
4181
4182 #define CHECK_SIZE() {                  \
4183         total_done += len;              \
4184         if (total_done >= buflen) {     \
4185                 buf[buflen-1] = '\0';   \
4186                 return 0;               \
4187         }                               \
4188 }
4189
4190 size_t fast_strftime(gchar *buf, gint buflen, const gchar *format, struct tm *lt)
4191 {
4192         gchar *curpos = buf;
4193         gint total_done = 0;
4194         gchar subbuf[64], subfmt[64];
4195         static time_t last_tzset = (time_t)0;
4196
4197         if (!time_names_init_done)
4198                 init_time_names();
4199
4200         if (format == NULL || lt == NULL)
4201                 return 0;
4202
4203         if (last_tzset != time(NULL)) {
4204                 tzset();
4205                 last_tzset = time(NULL);
4206         }
4207         while(*format) {
4208                 if (*format == '%') {
4209                         gint len = 0, tmp = 0;
4210                         format++;
4211                         switch(*format) {
4212                         case '%':
4213                                 len = 1; CHECK_SIZE();
4214                                 *curpos = '%';
4215                                 break;
4216                         case 'a':
4217                                 len = s_daynames_len[lt->tm_wday]; CHECK_SIZE();
4218                                 strncpy2(curpos, s_daynames[lt->tm_wday], buflen - total_done);
4219                                 break;
4220                         case 'A':
4221                                 len = daynames_len[lt->tm_wday]; CHECK_SIZE();
4222                                 strncpy2(curpos, daynames[lt->tm_wday], buflen - total_done);
4223                                 break;
4224                         case 'b':
4225                         case 'h':
4226                                 len = s_monthnames_len[lt->tm_mon]; CHECK_SIZE();
4227                                 strncpy2(curpos, s_monthnames[lt->tm_mon], buflen - total_done);
4228                                 break;
4229                         case 'B':
4230                                 len = monthnames_len[lt->tm_mon]; CHECK_SIZE();
4231                                 strncpy2(curpos, monthnames[lt->tm_mon], buflen - total_done);
4232                                 break;
4233                         case 'c':
4234                                 strftime(subbuf, 64, "%c", lt);
4235                                 len = strlen(subbuf); CHECK_SIZE();
4236                                 strncpy2(curpos, subbuf, buflen - total_done);
4237                                 break;
4238                         case 'C':
4239                                 total_done += 2; CHECK_SIZE();
4240                                 tmp = (lt->tm_year + 1900)/100;
4241                                 *curpos++ = '0'+(tmp / 10);
4242                                 *curpos++ = '0'+(tmp % 10);
4243                                 break;
4244                         case 'd':
4245                                 total_done += 2; CHECK_SIZE();
4246                                 *curpos++ = '0'+(lt->tm_mday / 10);
4247                                 *curpos++ = '0'+(lt->tm_mday % 10);
4248                                 break;
4249                         case 'D':
4250                                 total_done += 8; CHECK_SIZE();
4251                                 *curpos++ = '0'+((lt->tm_mon+1) / 10);
4252                                 *curpos++ = '0'+((lt->tm_mon+1) % 10);
4253                                 *curpos++ = '/';
4254                                 *curpos++ = '0'+(lt->tm_mday / 10);
4255                                 *curpos++ = '0'+(lt->tm_mday % 10);
4256                                 *curpos++ = '/';
4257                                 tmp = lt->tm_year%100;
4258                                 *curpos++ = '0'+(tmp / 10);
4259                                 *curpos++ = '0'+(tmp % 10);
4260                                 break;
4261                         case 'e':
4262                                 len = 2; CHECK_SIZE();
4263                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_mday);
4264                                 break;
4265                         case 'F':
4266                                 len = 10; CHECK_SIZE();
4267                                 snprintf(curpos, buflen - total_done, "%4d-%02d-%02d",
4268                                         lt->tm_year + 1900, lt->tm_mon +1, lt->tm_mday);
4269                                 break;
4270                         case 'H':
4271                                 total_done += 2; CHECK_SIZE();
4272                                 *curpos++ = '0'+(lt->tm_hour / 10);
4273                                 *curpos++ = '0'+(lt->tm_hour % 10);
4274                                 break;
4275                         case 'I':
4276                                 total_done += 2; CHECK_SIZE();
4277                                 tmp = lt->tm_hour;
4278                                 if (tmp > 12)
4279                                         tmp -= 12;
4280                                 else if (tmp == 0)
4281                                         tmp = 12;
4282                                 *curpos++ = '0'+(tmp / 10);
4283                                 *curpos++ = '0'+(tmp % 10);
4284                                 break;
4285                         case 'j':
4286                                 len = 3; CHECK_SIZE();
4287                                 snprintf(curpos, buflen - total_done, "%03d", lt->tm_yday+1);
4288                                 break;
4289                         case 'k':
4290                                 len = 2; CHECK_SIZE();
4291                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_hour);
4292                                 break;
4293                         case 'l':
4294                                 len = 2; CHECK_SIZE();
4295                                 tmp = lt->tm_hour;
4296                                 if (tmp > 12)
4297                                         tmp -= 12;
4298                                 else if (tmp == 0)
4299                                         tmp = 12;
4300                                 snprintf(curpos, buflen - total_done, "%2d", tmp);
4301                                 break;
4302                         case 'm':
4303                                 total_done += 2; CHECK_SIZE();
4304                                 tmp = lt->tm_mon + 1;
4305                                 *curpos++ = '0'+(tmp / 10);
4306                                 *curpos++ = '0'+(tmp % 10);
4307                                 break;
4308                         case 'M':
4309                                 total_done += 2; CHECK_SIZE();
4310                                 *curpos++ = '0'+(lt->tm_min / 10);
4311                                 *curpos++ = '0'+(lt->tm_min % 10);
4312                                 break;
4313                         case 'n':
4314                                 len = 1; CHECK_SIZE();
4315                                 *curpos = '\n';
4316                                 break;
4317                         case 'p':
4318                                 if (lt->tm_hour >= 12) {
4319                                         len = s_pm_up_len; CHECK_SIZE();
4320                                         snprintf(curpos, buflen-total_done, "%s", s_pm_up);
4321                                 } else {
4322                                         len = s_am_up_len; CHECK_SIZE();
4323                                         snprintf(curpos, buflen-total_done, "%s", s_am_up);
4324                                 }
4325                                 break;
4326                         case 'P':
4327                                 if (lt->tm_hour >= 12) {
4328                                         len = s_pm_low_len; CHECK_SIZE();
4329                                         snprintf(curpos, buflen-total_done, "%s", s_pm_low);
4330                                 } else {
4331                                         len = s_am_low_len; CHECK_SIZE();
4332                                         snprintf(curpos, buflen-total_done, "%s", s_am_low);
4333                                 }
4334                                 break;
4335                         case 'r':
4336 #ifdef G_OS_WIN32
4337                                 strftime(subbuf, 64, "%I:%M:%S %p", lt);
4338 #else
4339                                 strftime(subbuf, 64, "%r", lt);
4340 #endif
4341                                 len = strlen(subbuf); CHECK_SIZE();
4342                                 strncpy2(curpos, subbuf, buflen - total_done);
4343                                 break;
4344                         case 'R':
4345                                 total_done += 5; CHECK_SIZE();
4346                                 *curpos++ = '0'+(lt->tm_hour / 10);
4347                                 *curpos++ = '0'+(lt->tm_hour % 10);
4348                                 *curpos++ = ':';
4349                                 *curpos++ = '0'+(lt->tm_min / 10);
4350                                 *curpos++ = '0'+(lt->tm_min % 10);
4351                                 break;
4352                         case 's':
4353                                 snprintf(subbuf, 64, "%" CM_TIME_FORMAT, mktime(lt));
4354                                 len = strlen(subbuf); CHECK_SIZE();
4355                                 strncpy2(curpos, subbuf, buflen - total_done);
4356                                 break;
4357                         case 'S':
4358                                 total_done += 2; CHECK_SIZE();
4359                                 *curpos++ = '0'+(lt->tm_sec / 10);
4360                                 *curpos++ = '0'+(lt->tm_sec % 10);
4361                                 break;
4362                         case 't':
4363                                 len = 1; CHECK_SIZE();
4364                                 *curpos = '\t';
4365                                 break;
4366                         case 'T':
4367                                 total_done += 8; CHECK_SIZE();
4368                                 *curpos++ = '0'+(lt->tm_hour / 10);
4369                                 *curpos++ = '0'+(lt->tm_hour % 10);
4370                                 *curpos++ = ':';
4371                                 *curpos++ = '0'+(lt->tm_min / 10);
4372                                 *curpos++ = '0'+(lt->tm_min % 10);
4373                                 *curpos++ = ':';
4374                                 *curpos++ = '0'+(lt->tm_sec / 10);
4375                                 *curpos++ = '0'+(lt->tm_sec % 10);
4376                                 break;
4377                         case 'u':
4378                                 len = 1; CHECK_SIZE();
4379                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday == 0 ? 7: lt->tm_wday);
4380                                 break;
4381                         case 'w':
4382                                 len = 1; CHECK_SIZE();
4383                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday);
4384                                 break;
4385                         case 'x':
4386                                 strftime(subbuf, 64, "%x", lt);
4387                                 len = strlen(subbuf); CHECK_SIZE();
4388                                 strncpy2(curpos, subbuf, buflen - total_done);
4389                                 break;
4390                         case 'X':
4391                                 strftime(subbuf, 64, "%X", lt);
4392                                 len = strlen(subbuf); CHECK_SIZE();
4393                                 strncpy2(curpos, subbuf, buflen - total_done);
4394                                 break;
4395                         case 'y':
4396                                 total_done += 2; CHECK_SIZE();
4397                                 tmp = lt->tm_year%100;
4398                                 *curpos++ = '0'+(tmp / 10);
4399                                 *curpos++ = '0'+(tmp % 10);
4400                                 break;
4401                         case 'Y':
4402                                 len = 4; CHECK_SIZE();
4403                                 snprintf(curpos, buflen - total_done, "%4d", lt->tm_year + 1900);
4404                                 break;
4405                         case 'G':
4406                         case 'g':
4407                         case 'U':
4408                         case 'V':
4409                         case 'W':
4410                         case 'z':
4411                         case 'Z':
4412                         case '+':
4413                                 /* let these complicated ones be done with the libc */
4414                                 snprintf(subfmt, 64, "%%%c", *format);
4415                                 strftime(subbuf, 64, subfmt, lt);
4416                                 len = strlen(subbuf); CHECK_SIZE();
4417                                 strncpy2(curpos, subbuf, buflen - total_done);
4418                                 break;
4419                         case 'E':
4420                         case 'O':
4421                                 /* let these complicated modifiers be done with the libc */
4422                                 snprintf(subfmt, 64, "%%%c%c", *format, *(format+1));
4423                                 strftime(subbuf, 64, subfmt, lt);
4424                                 len = strlen(subbuf); CHECK_SIZE();
4425                                 strncpy2(curpos, subbuf, buflen - total_done);
4426                                 format++;
4427                                 break;
4428                         default:
4429                                 g_warning("format error (%c)", *format);
4430                                 *curpos = '\0';
4431                                 return total_done;
4432                         }
4433                         curpos += len;
4434                         format++;
4435                 } else {
4436                         int len = 1; CHECK_SIZE();
4437                         *curpos++ = *format++;
4438                 }
4439         }
4440         *curpos = '\0';
4441         return total_done;
4442 }
4443
4444 #ifdef G_OS_WIN32
4445 #define WEXITSTATUS(x) (x)
4446 #endif
4447
4448 static gchar *canonical_list_to_file(GSList *list)
4449 {
4450         GString *result = g_string_new(NULL);
4451         GSList *pathlist = g_slist_reverse(g_slist_copy(list));
4452         GSList *cur;
4453         gchar *str;
4454
4455 #ifndef G_OS_WIN32
4456         result = g_string_append(result, G_DIR_SEPARATOR_S);
4457 #else
4458         if (pathlist->data) {
4459                 const gchar *root = (gchar *)pathlist->data;
4460                 if (root[0] != '\0' && g_ascii_isalpha(root[0]) &&
4461                     root[1] == ':') {
4462                         /* drive - don't prepend dir separator */
4463                 } else {
4464                         result = g_string_append(result, G_DIR_SEPARATOR_S);
4465                 }
4466         }
4467 #endif
4468
4469         for (cur = pathlist; cur; cur = cur->next) {
4470                 result = g_string_append(result, (gchar *)cur->data);
4471                 if (cur->next)
4472                         result = g_string_append(result, G_DIR_SEPARATOR_S);
4473         }
4474         g_slist_free(pathlist);
4475
4476         str = result->str;
4477         g_string_free(result, FALSE);
4478
4479         return str;
4480 }
4481
4482 static GSList *cm_split_path(const gchar *filename, int depth)
4483 {
4484         gchar **path_parts;
4485         GSList *canonical_parts = NULL;
4486         GStatBuf st;
4487         int i;
4488 #ifndef G_OS_WIN32
4489         gboolean follow_symlinks = TRUE;
4490 #endif
4491
4492         if (depth > 32) {
4493 #ifndef G_OS_WIN32
4494                 errno = ELOOP;
4495 #else
4496                 errno = EINVAL; /* can't happen, no symlink handling */
4497 #endif
4498                 return NULL;
4499         }
4500
4501         if (!g_path_is_absolute(filename)) {
4502                 errno =EINVAL;
4503                 return NULL;
4504         }
4505
4506         path_parts = g_strsplit(filename, G_DIR_SEPARATOR_S, -1);
4507
4508         for (i = 0; path_parts[i] != NULL; i++) {
4509                 if (!strcmp(path_parts[i], ""))
4510                         continue;
4511                 if (!strcmp(path_parts[i], "."))
4512                         continue;
4513                 else if (!strcmp(path_parts[i], "..")) {
4514                         if (i == 0) {
4515                                 errno =ENOTDIR;
4516                                 g_strfreev(path_parts);
4517                                 return NULL;
4518                         }
4519                         else /* Remove the last inserted element */
4520                                 canonical_parts =
4521                                         g_slist_delete_link(canonical_parts,
4522                                                             canonical_parts);
4523                 } else {
4524                         gchar *tmp_path;
4525
4526                         canonical_parts = g_slist_prepend(canonical_parts,
4527                                                 g_strdup(path_parts[i]));
4528
4529                         tmp_path = canonical_list_to_file(canonical_parts);
4530
4531                         if(g_stat(tmp_path, &st) < 0) {
4532                                 if (errno == ENOENT) {
4533                                         errno = 0;
4534 #ifndef G_OS_WIN32
4535                                         follow_symlinks = FALSE;
4536 #endif
4537                                 }
4538                                 if (errno != 0) {
4539                                         g_free(tmp_path);
4540                                         slist_free_strings_full(canonical_parts);
4541                                         g_strfreev(path_parts);
4542
4543                                         return NULL;
4544                                 }
4545                         }
4546 #ifndef G_OS_WIN32
4547                         if (follow_symlinks && g_file_test(tmp_path, G_FILE_TEST_IS_SYMLINK)) {
4548                                 GError *error = NULL;
4549                                 gchar *target = g_file_read_link(tmp_path, &error);
4550
4551                                 if (!g_path_is_absolute(target)) {
4552                                         /* remove the last inserted element */
4553                                         canonical_parts =
4554                                                 g_slist_delete_link(canonical_parts,
4555                                                             canonical_parts);
4556                                         /* add the target */
4557                                         canonical_parts = g_slist_prepend(canonical_parts,
4558                                                 g_strdup(target));
4559                                         g_free(target);
4560
4561                                         /* and get the new target */
4562                                         target = canonical_list_to_file(canonical_parts);
4563                                 }
4564
4565                                 /* restart from absolute target */
4566                                 slist_free_strings_full(canonical_parts);
4567                                 canonical_parts = NULL;
4568                                 if (!error)
4569                                         canonical_parts = cm_split_path(target, depth + 1);
4570                                 else
4571                                         g_error_free(error);
4572                                 if (canonical_parts == NULL) {
4573                                         g_free(tmp_path);
4574                                         g_strfreev(path_parts);
4575                                         return NULL;
4576                                 }
4577                                 g_free(target);
4578                         }
4579 #endif
4580                         g_free(tmp_path);
4581                 }
4582         }
4583         g_strfreev(path_parts);
4584         return canonical_parts;
4585 }
4586
4587 /*
4588  * Canonicalize a filename, resolving symlinks along the way.
4589  * Returns a negative errno in case of error.
4590  */
4591 int cm_canonicalize_filename(const gchar *filename, gchar **canonical_name) {
4592         GSList *canonical_parts;
4593         gboolean is_absolute;
4594
4595         if (filename == NULL)
4596                 return -EINVAL;
4597         if (canonical_name == NULL)
4598                 return -EINVAL;
4599         *canonical_name = NULL;
4600
4601         is_absolute = g_path_is_absolute(filename);
4602         if (!is_absolute) {
4603                 /* Always work on absolute filenames. */
4604                 gchar *cur = g_get_current_dir();
4605                 gchar *absolute_filename = g_strconcat(cur, G_DIR_SEPARATOR_S,
4606                                                        filename, NULL);
4607
4608                 canonical_parts = cm_split_path(absolute_filename, 0);
4609                 g_free(absolute_filename);
4610                 g_free(cur);
4611         } else
4612                 canonical_parts = cm_split_path(filename, 0);
4613
4614         if (canonical_parts == NULL)
4615                 return -errno;
4616
4617         *canonical_name = canonical_list_to_file(canonical_parts);
4618         slist_free_strings_full(canonical_parts);
4619         return 0;
4620 }
4621
4622 /* Returns a decoded base64 string, guaranteed to be null-terminated. */
4623 guchar *g_base64_decode_zero(const gchar *text, gsize *out_len)
4624 {
4625         gchar *tmp = g_base64_decode(text, out_len);
4626         gchar *out = g_strndup(tmp, *out_len);
4627
4628         g_free(tmp);
4629
4630         if (strlen(out) != *out_len) {
4631                 g_warning("strlen(out) %"G_GSIZE_FORMAT" != *out_len %"G_GSIZE_FORMAT, strlen(out), *out_len);
4632         }
4633
4634         return out;
4635 }
4636
4637 /* Attempts to read count bytes from a PRNG into memory area starting at buf.
4638  * It is up to the caller to make sure there is at least count bytes
4639  * available at buf. */
4640 gboolean
4641 get_random_bytes(void *buf, size_t count)
4642 {
4643         /* Open our prng source. */
4644 #if defined G_OS_WIN32
4645         HCRYPTPROV rnd;
4646
4647         if (!CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, 0) &&
4648                         !CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
4649                 debug_print("Could not acquire a CSP handle.\n");
4650                 return FALSE;
4651         }
4652 #else
4653         int rnd;
4654         ssize_t ret;
4655
4656         rnd = open("/dev/urandom", O_RDONLY);
4657         if (rnd == -1) {
4658                 FILE_OP_ERROR("/dev/urandom", "open");
4659                 debug_print("Could not open /dev/urandom.\n");
4660                 return FALSE;
4661         }
4662 #endif
4663
4664         /* Read data from the source into buf. */
4665 #if defined G_OS_WIN32
4666         if (!CryptGenRandom(rnd, count, buf)) {
4667                 debug_print("Could not read %"G_GSIZE_FORMAT" random bytes.\n", count);
4668                 CryptReleaseContext(rnd, 0);
4669                 return FALSE;
4670         }
4671 #else
4672         ret = read(rnd, buf, count);
4673         if (ret != count) {
4674                 FILE_OP_ERROR("/dev/urandom", "read");
4675                 debug_print("Could not read enough data from /dev/urandom, read only %ld of %lu bytes.\n", ret, count);
4676                 close(rnd);
4677                 return FALSE;
4678         }
4679 #endif
4680
4681         /* Close the prng source. */
4682 #if defined G_OS_WIN32
4683         CryptReleaseContext(rnd, 0);
4684 #else
4685         close(rnd);
4686 #endif
4687
4688         return TRUE;
4689 }
4690
4691 /* returns FALSE if parsing failed, otherwise returns TRUE and sets *server, *port
4692    and eventually *fp from filename (if not NULL, they must be free'd by caller after
4693    user.
4694    filenames we expect: 'host.name.port.cert' or 'host.name.port.f:i:n:g:e:r:p:r:i:n:t.cert' */
4695 gboolean get_serverportfp_from_filename(const gchar *str, gchar **server, gchar **port, gchar **fp)
4696 {
4697         const gchar *pos, *dotport_pos = NULL, *dotcert_pos = NULL, *dotfp_pos = NULL;
4698
4699         g_return_val_if_fail(str != NULL, FALSE);
4700
4701         pos = str + strlen(str) - 1;
4702         while ((pos > str) && !dotport_pos) {
4703                 if (*pos == '.') {
4704                         if (!dotcert_pos) {
4705                                 /* match the .cert suffix */
4706                                 if (strcmp(pos, ".cert") == 0) {
4707                                         dotcert_pos = pos;
4708                                 }
4709                         } else {
4710                                 if (!dotfp_pos) {
4711                                         /* match an eventual fingerprint */
4712                                         /* or the port number */
4713                                         if (strncmp(pos + 3, ":", 1) == 0) {
4714                                                 dotfp_pos = pos;
4715                                         } else {
4716                                                 dotport_pos = pos;
4717                                         }
4718                                 } else {
4719                                         /* match the port number */
4720                                         dotport_pos = pos;
4721                                 }
4722                         }
4723                 }
4724                 pos--;
4725         }
4726         if (!dotport_pos || !dotcert_pos) {
4727                 g_warning("could not parse filename %s", str);
4728                 return FALSE;
4729         }
4730
4731         if (server != NULL)
4732                 *server = g_strndup(str, dotport_pos - str);
4733         if (dotfp_pos) {
4734                 if (port != NULL)
4735                         *port = g_strndup(dotport_pos + 1, dotfp_pos - dotport_pos - 1);
4736                 if (fp != NULL)
4737                         *fp = g_strndup(dotfp_pos + 1, dotcert_pos - dotfp_pos - 1);
4738         } else {
4739                 if (port != NULL)
4740                         *port = g_strndup(dotport_pos + 1, dotcert_pos - dotport_pos - 1);
4741                 if (fp != NULL)
4742                         *fp = NULL;
4743         }
4744
4745         debug_print("filename='%s' => server='%s' port='%s' fp='%s'\n",
4746                         str,
4747                         (server ? *server : "(n/a)"),
4748                         (port ? *port : "(n/a)"),
4749                         (fp ? *fp : "(n/a)"));
4750
4751         if (!(server && *server) || !(port && *port))
4752                 return FALSE;
4753         else
4754                 return TRUE;
4755 }
4756
4757 #ifdef G_OS_WIN32
4758 gchar *win32_debug_log_path(void)
4759 {
4760         return g_strconcat(g_get_tmp_dir(), G_DIR_SEPARATOR_S,
4761                         "claws-win32.log", NULL);
4762 }
4763 #endif