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         g_strstrip(str);
 612         if (*str == '\0')
 613                 return str;
 614         /* search for unescaped quote_chr */
 615         p = str;
 616         if (*p == quote_chr)
 617                 ++p, ++l;
 618         while (*p) {
 619                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 620                         ++k;
 621                 ++p, ++l;
 622         }
 623         if (!k) /* nothing to escape */
 624                 return str;
 625
 626         /* unescaped quote_chr found */
 627         qstr = g_malloc(l + k + 1);
 628         p = str;
 629         q = qstr;
 630         if (*p == quote_chr) {
 631                 *q = quote_chr;
 632                 ++p, ++q;
 633         }
 634         while (*p) {
 635                 if (*p == quote_chr && *(p - 1) != '\\' && *(p + 1) != '\0')
 636                         *q++ = '\\';
 637                 *q++ = *p++;
 638         }
 639         *q = '\0';
 640
 641         return qstr;
 642 }
 643
 644 void eliminate_address_comment(gchar *str)
 645 {
 646         register gchar *srcp, *destp;
 647         gint in_brace;
 648
 649         destp = str;
 650
 651         while ((destp = strchr(destp, '"'))) {
 652                 if ((srcp = strchr(destp + 1, '"'))) {
 653                         srcp++;
 654                         if (*srcp == '@') {
 655                                 destp = srcp + 1;
 656                         } else {
 657                                 while (g_ascii_isspace(*srcp)) srcp++;
 658                                 memmove(destp, srcp, strlen(srcp) + 1);
 659                         }
 660                 } else {
 661                         *destp = '\0';
 662                         break;
 663                 }
 664         }
 665
 666         destp = str;
 667
 668         while ((destp = strchr_with_skip_quote(destp, '"', '('))) {
 669                 in_brace = 1;
 670                 srcp = destp + 1;
 671                 while (*srcp) {
 672                         if (*srcp == '(')
 673                                 in_brace++;
 674                         else if (*srcp == ')')
 675                                 in_brace--;
 676                         srcp++;
 677                         if (in_brace == 0)
 678                                 break;
 679                 }
 680                 while (g_ascii_isspace(*srcp)) srcp++;
 681                 memmove(destp, srcp, strlen(srcp) + 1);
 682         }
 683 }
 684
 685 gchar *strchr_with_skip_quote(const gchar *str, gint quote_chr, gint c)
 686 {
 687         gboolean in_quote = FALSE;
 688
 689         while (*str) {
 690                 if (*str == c && !in_quote)
 691                         return (gchar *)str;
 692                 if (*str == quote_chr)
 693                         in_quote ^= TRUE;
 694                 str++;
 695         }
 696
 697         return NULL;
 698 }
 699
 700 void extract_address(gchar *str)
 701 {
 702         cm_return_if_fail(str != NULL);
 703         eliminate_address_comment(str);
 704         if (strchr_with_skip_quote(str, '"', '<'))
 705                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 706         g_strstrip(str);
 707 }
 708
 709 void extract_list_id_str(gchar *str)
 710 {
 711         if (strchr_with_skip_quote(str, '"', '<'))
 712                 extract_parenthesis_with_skip_quote(str, '"', '<', '>');
 713         g_strstrip(str);
 714 }
 715
 716 static GSList *address_list_append_real(GSList *addr_list, const gchar *str, gboolean removecomments)
 717 {
 718         gchar *work;
 719         gchar *workp;
 720
 721         if (!str) return addr_list;
 722
 723         Xstrdup_a(work, str, return addr_list);
 724
 725         if (removecomments)
 726                 eliminate_address_comment(work);
 727         workp = work;
 728
 729         while (workp && *workp) {
 730                 gchar *p, *next;
 731
 732                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 733                         *p = '\0';
 734                         next = p + 1;
 735                 } else
 736                         next = NULL;
 737
 738                 if (removecomments && strchr_with_skip_quote(workp, '"', '<'))
 739                         extract_parenthesis_with_skip_quote
 740                                 (workp, '"', '<', '>');
 741
 742                 g_strstrip(workp);
 743                 if (*workp)
 744                         addr_list = g_slist_append(addr_list, g_strdup(workp));
 745
 746                 workp = next;
 747         }
 748
 749         return addr_list;
 750 }
 751
 752 GSList *address_list_append(GSList *addr_list, const gchar *str)
 753 {
 754         return address_list_append_real(addr_list, str, TRUE);
 755 }
 756
 757 GSList *address_list_append_with_comments(GSList *addr_list, const gchar *str)
 758 {
 759         return address_list_append_real(addr_list, str, FALSE);
 760 }
 761
 762 GSList *references_list_prepend(GSList *msgid_list, const gchar *str)
 763 {
 764         const gchar *strp;
 765
 766         if (!str) return msgid_list;
 767         strp = str;
 768
 769         while (strp && *strp) {
 770                 const gchar *start, *end;
 771                 gchar *msgid;
 772
 773                 if ((start = strchr(strp, '<')) != NULL) {
 774                         end = strchr(start + 1, '>');
 775                         if (!end) break;
 776                 } else
 777                         break;
 778
 779                 msgid = g_strndup(start + 1, end - start - 1);
 780                 g_strstrip(msgid);
 781                 if (*msgid)
 782                         msgid_list = g_slist_prepend(msgid_list, msgid);
 783                 else
 784                         g_free(msgid);
 785
 786                 strp = end + 1;
 787         }
 788
 789         return msgid_list;
 790 }
 791
 792 GSList *references_list_append(GSList *msgid_list, const gchar *str)
 793 {
 794         GSList *list;
 795
 796         list = references_list_prepend(NULL, str);
 797         list = g_slist_reverse(list);
 798         msgid_list = g_slist_concat(msgid_list, list);
 799
 800         return msgid_list;
 801 }
 802
 803 GSList *newsgroup_list_append(GSList *group_list, const gchar *str)
 804 {
 805         gchar *work;
 806         gchar *workp;
 807
 808         if (!str) return group_list;
 809
 810         Xstrdup_a(work, str, return group_list);
 811
 812         workp = work;
 813
 814         while (workp && *workp) {
 815                 gchar *p, *next;
 816
 817                 if ((p = strchr_with_skip_quote(workp, '"', ','))) {
 818                         *p = '\0';
 819                         next = p + 1;
 820                 } else
 821                         next = NULL;
 822
 823                 g_strstrip(workp);
 824                 if (*workp)
 825                         group_list = g_slist_append(group_list,
 826                                                     g_strdup(workp));
 827
 828                 workp = next;
 829         }
 830
 831         return group_list;
 832 }
 833
 834 GList *add_history(GList *list, const gchar *str)
 835 {
 836         GList *old;
 837         gchar *oldstr;
 838
 839         cm_return_val_if_fail(str != NULL, list);
 840
 841         old = g_list_find_custom(list, (gpointer)str, (GCompareFunc)g_strcmp0);
 842         if (old) {
 843                 oldstr = old->data;
 844                 list = g_list_remove(list, old->data);
 845                 g_free(oldstr);
 846         } else if (g_list_length(list) >= MAX_HISTORY_SIZE) {
 847                 GList *last;
 848
 849                 last = g_list_last(list);
 850                 if (last) {
 851                         oldstr = last->data;
 852                         list = g_list_remove(list, last->data);
 853                         g_free(oldstr);
 854                 }
 855         }
 856
 857         list = g_list_prepend(list, g_strdup(str));
 858
 859         return list;
 860 }
 861
 862 void remove_return(gchar *str)
 863 {
 864         register gchar *p = str;
 865
 866         while (*p) {
 867                 if (*p == '\n' || *p == '\r')
 868                         memmove(p, p + 1, strlen(p));
 869                 else
 870                         p++;
 871         }
 872 }
 873
 874 void remove_space(gchar *str)
 875 {
 876         register gchar *p = str;
 877         register gint spc;
 878
 879         while (*p) {
 880                 spc = 0;
 881                 while (g_ascii_isspace(*(p + spc)))
 882                         spc++;
 883                 if (spc)
 884                         memmove(p, p + spc, strlen(p + spc) + 1);
 885                 else
 886                         p++;
 887         }
 888 }
 889
 890 void unfold_line(gchar *str)
 891 {
 892         register gchar *ch;
 893         register gunichar c;
 894         register gint len;
 895
 896         ch = str; /* iterator for source string */
 897
 898         while (*ch != 0) {
 899                 c = g_utf8_get_char_validated(ch, -1);
 900
 901                 if (c == (gunichar)-1 || c == (gunichar)-2) {
 902                         /* non-unicode byte, move past it */
 903                         ch++;
 904                         continue;
 905                 }
 906
 907                 len = g_unichar_to_utf8(c, NULL);
 908
 909                 if ((!g_unichar_isdefined(c) || !g_unichar_isprint(c) ||
 910                                 g_unichar_isspace(c)) && c != 173) {
 911                         /* replace anything bad or whitespacey with a single space */
 912                         *ch = ' ';
 913                         ch++;
 914                         if (len > 1) {
 915                                 /* move rest of the string forwards, since we just replaced
 916                                  * a multi-byte sequence with one byte */
 917                                 memmove(ch, ch + len-1, strlen(ch + len-1) + 1);
 918                         }
 919                 } else {
 920                         /* A valid unicode character, copy it. */
 921                         ch += len;
 922                 }
 923         }
 924 }
 925
 926 void subst_char(gchar *str, gchar orig, gchar subst)
 927 {
 928         register gchar *p = str;
 929
 930         while (*p) {
 931                 if (*p == orig)
 932                         *p = subst;
 933                 p++;
 934         }
 935 }
 936
 937 void subst_chars(gchar *str, gchar *orig, gchar subst)
 938 {
 939         register gchar *p = str;
 940
 941         while (*p) {
 942                 if (strchr(orig, *p) != NULL)
 943                         *p = subst;
 944                 p++;
 945         }
 946 }
 947
 948 void subst_for_filename(gchar *str)
 949 {
 950         if (!str)
 951                 return;
 952 #ifdef G_OS_WIN32
 953         subst_chars(str, "\t\r\n\\/*?:", '_');
 954 #else
 955         subst_chars(str, "\t\r\n\\/*", '_');
 956 #endif
 957 }
 958
 959 void subst_for_shellsafe_filename(gchar *str)
 960 {
 961         if (!str)
 962                 return;
 963         subst_for_filename(str);
 964         subst_chars(str, " \"'|&;()<>'!{}[]",'_');
 965 }
 966
 967 gboolean is_ascii_str(const gchar *str)
 968 {
 969         const guchar *p = (const guchar *)str;
 970
 971         while (*p != '\0') {
 972                 if (*p != '\t' && *p != ' ' &&
 973                     *p != '\r' && *p != '\n' &&
 974                     (*p < 32 || *p >= 127))
 975                         return FALSE;
 976                 p++;
 977         }
 978
 979         return TRUE;
 980 }
 981
 982 static const gchar * line_has_quote_char_last(const gchar * str, const gchar *quote_chars)
 983 {
 984         gchar * position = NULL;
 985         gchar * tmp_pos = NULL;
 986         int i;
 987
 988         if (str == NULL || quote_chars == NULL)
 989                 return NULL;
 990
 991         for (i = 0; i < strlen(quote_chars); i++) {
 992                 tmp_pos = strrchr (str, quote_chars[i]);
 993                 if(position == NULL
 994                                 || (tmp_pos != NULL && position <= tmp_pos) )
 995                         position = tmp_pos;
 996         }
 997         return position;
 998 }
 999
1000 gint get_quote_level(const gchar *str, const gchar *quote_chars)
1001 {
1002         const gchar *first_pos;
1003         const gchar *last_pos;
1004         const gchar *p = str;
1005         gint quote_level = -1;
1006
1007         /* speed up line processing by only searching to the last '>' */
1008         if ((first_pos = line_has_quote_char(str, quote_chars)) != NULL) {
1009                 /* skip a line if it contains a '<' before the initial '>' */
1010                 if (memchr(str, '<', first_pos - str) != NULL)
1011                         return -1;
1012                 last_pos = line_has_quote_char_last(first_pos, quote_chars);
1013         } else
1014                 return -1;
1015
1016         while (p <= last_pos) {
1017                 while (p < last_pos) {
1018                         if (g_ascii_isspace(*p))
1019                                 p++;
1020                         else
1021                                 break;
1022                 }
1023
1024                 if (strchr(quote_chars, *p))
1025                         quote_level++;
1026                 else if (*p != '-' && !g_ascii_isspace(*p) && p <= last_pos) {
1027                         /* any characters are allowed except '-','<' and space */
1028                         while (*p != '-' && *p != '<'
1029                                && !strchr(quote_chars, *p)
1030                                && !g_ascii_isspace(*p)
1031                                && p < last_pos)
1032                                 p++;
1033                         if (strchr(quote_chars, *p))
1034                                 quote_level++;
1035                         else
1036                                 break;
1037                 }
1038
1039                 p++;
1040         }
1041
1042         return quote_level;
1043 }
1044
1045 gint check_line_length(const gchar *str, gint max_chars, gint *line)
1046 {
1047         const gchar *p = str, *q;
1048         gint cur_line = 0, len;
1049
1050         while ((q = strchr(p, '\n')) != NULL) {
1051                 len = q - p + 1;
1052                 if (len > max_chars) {
1053                         if (line)
1054                                 *line = cur_line;
1055                         return -1;
1056                 }
1057                 p = q + 1;
1058                 ++cur_line;
1059         }
1060
1061         len = strlen(p);
1062         if (len > max_chars) {
1063                 if (line)
1064                         *line = cur_line;
1065                 return -1;
1066         }
1067
1068         return 0;
1069 }
1070
1071 const gchar * line_has_quote_char(const gchar * str, const gchar *quote_chars)
1072 {
1073         gchar * position = NULL;
1074         gchar * tmp_pos = NULL;
1075         int i;
1076
1077         if (str == NULL || quote_chars == NULL)
1078                 return NULL;
1079
1080         for (i = 0; i < strlen(quote_chars); i++) {
1081                 tmp_pos = strchr (str, quote_chars[i]);
1082                 if(position == NULL
1083                                 || (tmp_pos != NULL && position >= tmp_pos) )
1084                         position = tmp_pos;
1085         }
1086         return position;
1087 }
1088
1089 static gchar *strstr_with_skip_quote(const gchar *haystack, const gchar *needle)
1090 {
1091         register guint haystack_len, needle_len;
1092         gboolean in_squote = FALSE, in_dquote = FALSE;
1093
1094         haystack_len = strlen(haystack);
1095         needle_len   = strlen(needle);
1096
1097         if (haystack_len < needle_len || needle_len == 0)
1098                 return NULL;
1099
1100         while (haystack_len >= needle_len) {
1101                 if (!in_squote && !in_dquote &&
1102                     !strncmp(haystack, needle, needle_len))
1103                         return (gchar *)haystack;
1104
1105                 /* 'foo"bar"' -> foo"bar"
1106                    "foo'bar'" -> foo'bar' */
1107                 if (*haystack == '\'') {
1108                         if (in_squote)
1109                                 in_squote = FALSE;
1110                         else if (!in_dquote)
1111                                 in_squote = TRUE;
1112                 } else if (*haystack == '\"') {
1113                         if (in_dquote)
1114                                 in_dquote = FALSE;
1115                         else if (!in_squote)
1116                                 in_dquote = TRUE;
1117                 } else if (*haystack == '\\') {
1118                         haystack++;
1119                         haystack_len--;
1120                 }
1121
1122                 haystack++;
1123                 haystack_len--;
1124         }
1125
1126         return NULL;
1127 }
1128
1129 gchar **strsplit_with_quote(const gchar *str, const gchar *delim,
1130                             gint max_tokens)
1131 {
1132         GSList *string_list = NULL, *slist;
1133         gchar **str_array, *s, *new_str;
1134         guint i, n = 1, len;
1135
1136         cm_return_val_if_fail(str != NULL, NULL);
1137         cm_return_val_if_fail(delim != NULL, NULL);
1138
1139         if (max_tokens < 1)
1140                 max_tokens = G_MAXINT;
1141
1142         s = strstr_with_skip_quote(str, delim);
1143         if (s) {
1144                 guint delimiter_len = strlen(delim);
1145
1146                 do {
1147                         len = s - str;
1148                         new_str = g_strndup(str, len);
1149
1150                         if (new_str[0] == '\'' || new_str[0] == '\"') {
1151                                 if (new_str[len - 1] == new_str[0]) {
1152                                         new_str[len - 1] = '\0';
1153                                         memmove(new_str, new_str + 1, len - 1);
1154                                 }
1155                         }
1156                         string_list = g_slist_prepend(string_list, new_str);
1157                         n++;
1158                         str = s + delimiter_len;
1159                         s = strstr_with_skip_quote(str, delim);
1160                 } while (--max_tokens && s);
1161         }
1162
1163         if (*str) {
1164                 new_str = g_strdup(str);
1165                 if (new_str[0] == '\'' || new_str[0] == '\"') {
1166                         len = strlen(str);
1167                         if (new_str[len - 1] == new_str[0]) {
1168                                 new_str[len - 1] = '\0';
1169                                 memmove(new_str, new_str + 1, len - 1);
1170                         }
1171                 }
1172                 string_list = g_slist_prepend(string_list, new_str);
1173                 n++;
1174         }
1175
1176         str_array = g_new(gchar*, n);
1177
1178         i = n - 1;
1179
1180         str_array[i--] = NULL;
1181         for (slist = string_list; slist; slist = slist->next)
1182                 str_array[i--] = slist->data;
1183
1184         g_slist_free(string_list);
1185
1186         return str_array;
1187 }
1188
1189 gchar *get_abbrev_newsgroup_name(const gchar *group, gint len)
1190 {
1191         gchar *abbrev_group;
1192         gchar *ap;
1193         const gchar *p = group;
1194         const gchar *last;
1195
1196         cm_return_val_if_fail(group != NULL, NULL);
1197
1198         last = group + strlen(group);
1199         abbrev_group = ap = g_malloc(strlen(group) + 1);
1200
1201         while (*p) {
1202                 while (*p == '.')
1203                         *ap++ = *p++;
1204                 if ((ap - abbrev_group) + (last - p) > len && strchr(p, '.')) {
1205                         *ap++ = *p++;
1206                         while (*p != '.') p++;
1207                 } else {
1208                         strcpy(ap, p);
1209                         return abbrev_group;
1210                 }
1211         }
1212
1213         *ap = '\0';
1214         return abbrev_group;
1215 }
1216
1217 gchar *trim_string(const gchar *str, gint len)
1218 {
1219         const gchar *p = str;
1220         gint mb_len;
1221         gchar *new_str;
1222         gint new_len = 0;
1223
1224         if (!str) return NULL;
1225         if (strlen(str) <= len)
1226                 return g_strdup(str);
1227         if (g_utf8_validate(str, -1, NULL) == FALSE)
1228                 return g_strdup(str);
1229
1230         while (*p != '\0') {
1231                 mb_len = g_utf8_skip[*(guchar *)p];
1232                 if (mb_len == 0)
1233                         break;
1234                 else if (new_len + mb_len > len)
1235                         break;
1236
1237                 new_len += mb_len;
1238                 p += mb_len;
1239         }
1240
1241         Xstrndup_a(new_str, str, new_len, return g_strdup(str));
1242         return g_strconcat(new_str, "...", NULL);
1243 }
1244
1245 GList *uri_list_extract_filenames(const gchar *uri_list)
1246 {
1247         GList *result = NULL;
1248         const gchar *p, *q;
1249         gchar *escaped_utf8uri;
1250
1251         p = uri_list;
1252
1253         while (p) {
1254                 if (*p != '#') {
1255                         while (g_ascii_isspace(*p)) p++;
1256                         if (!strncmp(p, "file:", 5)) {
1257                                 q = p;
1258                                 q += 5;
1259                                 while (*q && *q != '\n' && *q != '\r') q++;
1260
1261                                 if (q > p) {
1262                                         gchar *file, *locale_file = NULL;
1263                                         q--;
1264                                         while (q > p && g_ascii_isspace(*q))
1265                                                 q--;
1266                                         Xalloca(escaped_utf8uri, q - p + 2,
1267                                                 return result);
1268                                         Xalloca(file, q - p + 2,
1269                                                 return result);
1270                                         *file = '\0';
1271                                         strncpy(escaped_utf8uri, p, q - p + 1);
1272                                         escaped_utf8uri[q - p + 1] = '\0';
1273                                         decode_uri_with_plus(file, escaped_utf8uri, FALSE);
1274                     /*
1275                      * g_filename_from_uri() rejects escaped/locale encoded uri
1276                      * string which come from Nautilus.
1277                      */
1278 #ifndef G_OS_WIN32
1279                                         if (g_utf8_validate(file, -1, NULL))
1280                                                 locale_file
1281                                                         = conv_codeset_strdup(
1282                                                                 file + 5,
1283                                                                 CS_UTF_8,
1284                                                                 conv_get_locale_charset_str());
1285                                         if (!locale_file)
1286                                                 locale_file = g_strdup(file + 5);
1287 #else
1288                                         locale_file = g_filename_from_uri(escaped_utf8uri, NULL, NULL);
1289 #endif
1290                                         result = g_list_append(result, locale_file);
1291                                 }
1292                         }
1293                 }
1294                 p = strchr(p, '\n');
1295                 if (p) p++;
1296         }
1297
1298         return result;
1299 }
1300
1301 /* Converts two-digit hexadecimal to decimal.  Used for unescaping escaped
1302  * characters
1303  */
1304 static gint axtoi(const gchar *hexstr)
1305 {
1306         gint hi, lo, result;
1307
1308         hi = hexstr[0];
1309         if ('0' <= hi && hi <= '9') {
1310                 hi -= '0';
1311         } else
1312                 if ('a' <= hi && hi <= 'f') {
1313                         hi -= ('a' - 10);
1314                 } else
1315                         if ('A' <= hi && hi <= 'F') {
1316                                 hi -= ('A' - 10);
1317                         }
1318
1319         lo = hexstr[1];
1320         if ('0' <= lo && lo <= '9') {
1321                 lo -= '0';
1322         } else
1323                 if ('a' <= lo && lo <= 'f') {
1324                         lo -= ('a'-10);
1325                 } else
1326                         if ('A' <= lo && lo <= 'F') {
1327                                 lo -= ('A' - 10);
1328                         }
1329         result = lo + (16 * hi);
1330         return result;
1331 }
1332
1333 gboolean is_uri_string(const gchar *str)
1334 {
1335         while (str && *str && g_ascii_isspace(*str))
1336                 str++;
1337         return (g_ascii_strncasecmp(str, "http://", 7) == 0 ||
1338                 g_ascii_strncasecmp(str, "https://", 8) == 0 ||
1339                 g_ascii_strncasecmp(str, "ftp://", 6) == 0 ||
1340                 g_ascii_strncasecmp(str, "ftps://", 7) == 0 ||
1341                 g_ascii_strncasecmp(str, "sftp://", 7) == 0 ||
1342                 g_ascii_strncasecmp(str, "ftp.", 4) == 0 ||
1343                 g_ascii_strncasecmp(str, "webcal://", 9) == 0 ||
1344                 g_ascii_strncasecmp(str, "webcals://", 10) == 0 ||
1345                 g_ascii_strncasecmp(str, "www.", 4) == 0);
1346 }
1347
1348 gchar *get_uri_path(const gchar *uri)
1349 {
1350         while (uri && *uri && g_ascii_isspace(*uri))
1351                 uri++;
1352         if (g_ascii_strncasecmp(uri, "http://", 7) == 0)
1353                 return (gchar *)(uri + 7);
1354         else if (g_ascii_strncasecmp(uri, "https://", 8) == 0)
1355                 return (gchar *)(uri + 8);
1356         else if (g_ascii_strncasecmp(uri, "ftp://", 6) == 0)
1357                 return (gchar *)(uri + 6);
1358         else if (g_ascii_strncasecmp(uri, "ftps://", 7) == 0)
1359                 return (gchar *)(uri + 7);
1360         else if (g_ascii_strncasecmp(uri, "sftp://", 7) == 0)
1361                 return (gchar *)(uri + 7);
1362         else if (g_ascii_strncasecmp(uri, "webcal://", 9) == 0)
1363                 return (gchar *)(uri + 7);
1364         else if (g_ascii_strncasecmp(uri, "webcals://", 10) == 0)
1365                 return (gchar *)(uri + 7);
1366         else
1367                 return (gchar *)uri;
1368 }
1369
1370 gint get_uri_len(const gchar *str)
1371 {
1372         const gchar *p;
1373
1374         if (is_uri_string(str)) {
1375                 for (p = str; *p != '\0'; p++) {
1376                         if (!g_ascii_isgraph(*p) || strchr("<>\"", *p))
1377                                 break;
1378                 }
1379                 return p - str;
1380         }
1381
1382         return 0;
1383 }
1384
1385 /* Decodes URL-Encoded strings (i.e. strings in which spaces are replaced by
1386  * plusses, and escape characters are used)
1387  */
1388 void decode_uri_with_plus(gchar *decoded_uri, const gchar *encoded_uri, gboolean with_plus)
1389 {
1390         gchar *dec = decoded_uri;
1391         const gchar *enc = encoded_uri;
1392
1393         while (*enc) {
1394                 if (*enc == '%') {
1395                         enc++;
1396                         if (isxdigit((guchar)enc[0]) &&
1397                             isxdigit((guchar)enc[1])) {
1398                                 *dec = axtoi(enc);
1399                                 dec++;
1400                                 enc += 2;
1401                         }
1402                 } else {
1403                         if (with_plus && *enc == '+')
1404                                 *dec = ' ';
1405                         else
1406                                 *dec = *enc;
1407                         dec++;
1408                         enc++;
1409                 }
1410         }
1411
1412         *dec = '\0';
1413 }
1414
1415 void decode_uri(gchar *decoded_uri, const gchar *encoded_uri)
1416 {
1417         decode_uri_with_plus(decoded_uri, encoded_uri, TRUE);
1418 }
1419
1420 static gchar *decode_uri_gdup(const gchar *encoded_uri)
1421 {
1422     gchar *buffer = g_malloc(strlen(encoded_uri)+1);
1423     decode_uri_with_plus(buffer, encoded_uri, FALSE);
1424     return buffer;
1425 }
1426
1427 gint scan_mailto_url(const gchar *mailto, gchar **from, gchar **to, gchar **cc, gchar **bcc,
1428                      gchar **subject, gchar **body, gchar ***attach, gchar **inreplyto)
1429 {
1430         gchar *tmp_mailto;
1431         gchar *p;
1432         const gchar *forbidden_uris[] = { ".gnupg/",
1433                                           "/etc/passwd",
1434                                           "/etc/shadow",
1435                                           ".ssh/",
1436                                           "../",
1437                                           NULL };
1438         gint num_attach = 0;
1439
1440         cm_return_val_if_fail(mailto != NULL, -1);
1441
1442         Xstrdup_a(tmp_mailto, mailto, return -1);
1443
1444         if (!strncmp(tmp_mailto, "mailto:", 7))
1445                 tmp_mailto += 7;
1446
1447         p = strchr(tmp_mailto, '?');
1448         if (p) {
1449                 *p = '\0';
1450                 p++;
1451         }
1452
1453         if (to && !*to)
1454                 *to = decode_uri_gdup(tmp_mailto);
1455
1456         while (p) {
1457                 gchar *field, *value;
1458
1459                 field = p;
1460
1461                 p = strchr(p, '=');
1462                 if (!p) break;
1463                 *p = '\0';
1464                 p++;
1465
1466                 value = p;
1467
1468                 p = strchr(p, '&');
1469                 if (p) {
1470                         *p = '\0';
1471                         p++;
1472                 }
1473
1474                 if (*value == '\0') continue;
1475
1476                 if (from && !g_ascii_strcasecmp(field, "from")) {
1477                         if (!*from) {
1478                                 *from = decode_uri_gdup(value);
1479                         } else {
1480                                 gchar *tmp = decode_uri_gdup(value);
1481                                 gchar *new_from = g_strdup_printf("%s, %s", *from, tmp);
1482                                 g_free(tmp);
1483                                 g_free(*from);
1484                                 *from = new_from;
1485                         }
1486                 } else if (cc && !g_ascii_strcasecmp(field, "cc")) {
1487                         if (!*cc) {
1488                                 *cc = decode_uri_gdup(value);
1489                         } else {
1490                                 gchar *tmp = decode_uri_gdup(value);
1491                                 gchar *new_cc = g_strdup_printf("%s, %s", *cc, tmp);
1492                                 g_free(tmp);
1493                                 g_free(*cc);
1494                                 *cc = new_cc;
1495                         }
1496                 } else if (bcc && !g_ascii_strcasecmp(field, "bcc")) {
1497                         if (!*bcc) {
1498                                 *bcc = decode_uri_gdup(value);
1499                         } else {
1500                                 gchar *tmp = decode_uri_gdup(value);
1501                                 gchar *new_bcc = g_strdup_printf("%s, %s", *bcc, tmp);
1502                                 g_free(tmp);
1503                                 g_free(*bcc);
1504                                 *bcc = new_bcc;
1505                         }
1506                 } else if (subject && !*subject &&
1507                            !g_ascii_strcasecmp(field, "subject")) {
1508                         *subject = decode_uri_gdup(value);
1509                 } else if (body && !*body && !g_ascii_strcasecmp(field, "body")) {
1510                         *body = decode_uri_gdup(value);
1511                 } else if (body && !*body && !g_ascii_strcasecmp(field, "insert")) {
1512                         int i = 0;
1513                         gchar *tmp = decode_uri_gdup(value);
1514
1515                         for (; forbidden_uris[i]; i++) {
1516                                 if (strstr(tmp, forbidden_uris[i])) {
1517                                         g_print("Refusing to insert '%s', potential private data leak\n",
1518                                                         tmp);
1519                                         g_free(tmp);
1520                                         tmp = NULL;
1521                                         break;
1522                                 }
1523                         }
1524
1525                         if (tmp) {
1526                                 if (!is_file_entry_regular(tmp)) {
1527                                         g_warning("refusing to insert '%s', not a regular file", tmp);
1528                                 } else if (!g_file_get_contents(tmp, body, NULL, NULL)) {
1529                                         g_warning("couldn't set insert file '%s' in body", value);
1530                                 }
1531
1532                                 g_free(tmp);
1533                         }
1534                 } else if (attach && !g_ascii_strcasecmp(field, "attach")) {
1535                         int i = 0;
1536                         gchar *tmp = decode_uri_gdup(value);
1537                         gchar **my_att = g_malloc(sizeof(char *));
1538
1539                         my_att[0] = NULL;
1540
1541                         for (; forbidden_uris[i]; i++) {
1542                                 if (strstr(tmp, forbidden_uris[i])) {
1543                                         g_print("Refusing to attach '%s', potential private data leak\n",
1544                                                         tmp);
1545                                         g_free(tmp);
1546                                         tmp = NULL;
1547                                         break;
1548                                 }
1549                         }
1550                         if (tmp) {
1551                                 /* attach is correct */
1552                                 num_attach++;
1553                                 my_att = g_realloc(my_att, (sizeof(char *))*(num_attach+1));
1554                                 my_att[num_attach-1] = tmp;
1555                                 my_att[num_attach] = NULL;
1556                                 *attach = my_att;
1557                         }
1558             else
1559                                 g_free(my_att);
1560                 } else if (inreplyto && !*inreplyto &&
1561                            !g_ascii_strcasecmp(field, "in-reply-to")) {
1562                         *inreplyto = decode_uri_gdup(value);
1563                 }
1564         }
1565
1566         return 0;
1567 }
1568
1569
1570 #ifdef G_OS_WIN32
1571 #include <windows.h>
1572 #ifndef CSIDL_APPDATA
1573 #define CSIDL_APPDATA 0x001a
1574 #endif
1575 #ifndef CSIDL_LOCAL_APPDATA
1576 #define CSIDL_LOCAL_APPDATA 0x001c
1577 #endif
1578 #ifndef CSIDL_FLAG_CREATE
1579 #define CSIDL_FLAG_CREATE 0x8000
1580 #endif
1581 #define DIM(v)               (sizeof(v)/sizeof((v)[0]))
1582
1583 #define RTLD_LAZY 0
1584 const char *
1585 w32_strerror (int w32_errno)
1586 {
1587   static char strerr[256];
1588   int ec = (int)GetLastError ();
1589
1590   if (w32_errno == 0)
1591     w32_errno = ec;
1592   FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, w32_errno,
1593                  MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
1594                  strerr, DIM (strerr)-1, NULL);
1595   return strerr;
1596 }
1597
1598 static __inline__ void *
1599 dlopen (const char * name, int flag)
1600 {
1601   void * hd = LoadLibrary (name);
1602   return hd;
1603 }
1604
1605 static __inline__ void *
1606 dlsym (void * hd, const char * sym)
1607 {
1608   if (hd && sym)
1609     {
1610       void * fnc = GetProcAddress (hd, sym);
1611       if (!fnc)
1612         return NULL;
1613       return fnc;
1614     }
1615   return NULL;
1616 }
1617
1618
1619 static __inline__ const char *
1620 dlerror (void)
1621 {
1622   return w32_strerror (0);
1623 }
1624
1625
1626 static __inline__ int
1627 dlclose (void * hd)
1628 {
1629   if (hd)
1630     {
1631       FreeLibrary (hd);
1632       return 0;
1633     }
1634   return -1;
1635 }
1636
1637 static HRESULT
1638 w32_shgetfolderpath (HWND a, int b, HANDLE c, DWORD d, LPSTR e)
1639 {
1640   static int initialized;
1641   static HRESULT (WINAPI * func)(HWND,int,HANDLE,DWORD,LPSTR);
1642
1643   if (!initialized)
1644     {
1645       static char *dllnames[] = { "shell32.dll", "shfolder.dll", NULL };
1646       void *handle;
1647       int i;
1648
1649       initialized = 1;
1650
1651       for (i=0, handle = NULL; !handle && dllnames[i]; i++)
1652         {
1653           handle = dlopen (dllnames[i], RTLD_LAZY);
1654           if (handle)
1655             {
1656               func = dlsym (handle, "SHGetFolderPathW");
1657               if (!func)
1658                 {
1659                   dlclose (handle);
1660                   handle = NULL;
1661                 }
1662             }
1663         }
1664     }
1665
1666   if (func)
1667     return func (a,b,c,d,e);
1668   else
1669     return -1;
1670 }
1671
1672 /* Returns a static string with the directroy from which the module
1673    has been loaded.  Returns an empty string on error. */
1674 static char *w32_get_module_dir(void)
1675 {
1676         static char *moddir;
1677
1678         if (!moddir) {
1679                 char name[MAX_PATH+10];
1680                 char *p;
1681
1682                 if ( !GetModuleFileNameA (0, name, sizeof (name)-10) )
1683                         *name = 0;
1684                 else {
1685                         p = strrchr (name, '\\');
1686                         if (p)
1687                                 *p = 0;
1688                         else
1689                                 *name = 0;
1690                 }
1691                 moddir = g_strdup (name);
1692         }
1693         return moddir;
1694 }
1695 #endif /* G_OS_WIN32 */
1696
1697 /* Return a static string with the locale dir. */
1698 const gchar *get_locale_dir(void)
1699 {
1700         static gchar *loc_dir;
1701
1702 #ifdef G_OS_WIN32
1703         if (!loc_dir)
1704                 loc_dir = g_strconcat(w32_get_module_dir(), G_DIR_SEPARATOR_S,
1705                                       "\\share\\locale", NULL);
1706 #endif
1707         if (!loc_dir)
1708                 loc_dir = LOCALEDIR;
1709
1710         return loc_dir;
1711 }
1712
1713
1714 const gchar *get_home_dir(void)
1715 {
1716 #ifdef G_OS_WIN32
1717         static char home_dir_utf16[MAX_PATH] = "";
1718         static gchar *home_dir_utf8 = NULL;
1719         if (home_dir_utf16[0] == '\0') {
1720                 if (w32_shgetfolderpath
1721                             (NULL, CSIDL_APPDATA|CSIDL_FLAG_CREATE,
1722                              NULL, 0, home_dir_utf16) < 0)
1723                                 strcpy (home_dir_utf16, "C:\\Claws Mail");
1724                 home_dir_utf8 = g_utf16_to_utf8 ((const gunichar2 *)home_dir_utf16, -1, NULL, NULL, NULL);
1725         }
1726         return home_dir_utf8;
1727 #else
1728         static const gchar *homeenv = NULL;
1729
1730         if (homeenv)
1731                 return homeenv;
1732
1733         if (!homeenv && g_getenv("HOME") != NULL)
1734                 homeenv = g_strdup(g_getenv("HOME"));
1735         if (!homeenv)
1736                 homeenv = g_get_home_dir();
1737
1738         return homeenv;
1739 #endif
1740 }
1741
1742 static gchar *claws_rc_dir = NULL;
1743 static gboolean rc_dir_alt = FALSE;
1744 const gchar *get_rc_dir(void)
1745 {
1746
1747         if (!claws_rc_dir) {
1748                 claws_rc_dir = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1749                                      RC_DIR, NULL);
1750                 debug_print("using default rc_dir %s\n", claws_rc_dir);
1751         }
1752         return claws_rc_dir;
1753 }
1754
1755 void set_rc_dir(const gchar *dir)
1756 {
1757         gchar *canonical_dir;
1758         if (claws_rc_dir != NULL) {
1759                 g_print("Error: rc_dir already set\n");
1760         } else {
1761                 int err = cm_canonicalize_filename(dir, &canonical_dir);
1762                 int len;
1763
1764                 if (err) {
1765                         g_print("Error looking for %s: %d(%s)\n",
1766                                 dir, -err, g_strerror(-err));
1767                         exit(0);
1768                 }
1769                 rc_dir_alt = TRUE;
1770
1771                 claws_rc_dir = canonical_dir;
1772
1773                 len = strlen(claws_rc_dir);
1774                 if (claws_rc_dir[len - 1] == G_DIR_SEPARATOR)
1775                         claws_rc_dir[len - 1] = '\0';
1776
1777                 debug_print("set rc_dir to %s\n", claws_rc_dir);
1778                 if (!is_dir_exist(claws_rc_dir)) {
1779                         if (make_dir_hier(claws_rc_dir) != 0) {
1780                                 g_print("Error: can't create %s\n",
1781                                 claws_rc_dir);
1782                                 exit(0);
1783                         }
1784                 }
1785         }
1786 }
1787
1788 gboolean rc_dir_is_alt(void) {
1789         return rc_dir_alt;
1790 }
1791
1792 const gchar *get_mail_base_dir(void)
1793 {
1794         return get_home_dir();
1795 }
1796
1797 const gchar *get_news_cache_dir(void)
1798 {
1799         static gchar *news_cache_dir = NULL;
1800         if (!news_cache_dir)
1801                 news_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1802                                              NEWS_CACHE_DIR, NULL);
1803
1804         return news_cache_dir;
1805 }
1806
1807 const gchar *get_imap_cache_dir(void)
1808 {
1809         static gchar *imap_cache_dir = NULL;
1810
1811         if (!imap_cache_dir)
1812                 imap_cache_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1813                                              IMAP_CACHE_DIR, NULL);
1814
1815         return imap_cache_dir;
1816 }
1817
1818 const gchar *get_mime_tmp_dir(void)
1819 {
1820         static gchar *mime_tmp_dir = NULL;
1821
1822         if (!mime_tmp_dir)
1823                 mime_tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1824                                            MIME_TMP_DIR, NULL);
1825
1826         return mime_tmp_dir;
1827 }
1828
1829 const gchar *get_template_dir(void)
1830 {
1831         static gchar *template_dir = NULL;
1832
1833         if (!template_dir)
1834                 template_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1835                                            TEMPLATE_DIR, NULL);
1836
1837         return template_dir;
1838 }
1839
1840 #ifdef G_OS_WIN32
1841 const gchar *w32_get_cert_file(void)
1842 {
1843         const gchar *cert_file = NULL;
1844         if (!cert_file)
1845                 cert_file = g_strconcat(w32_get_module_dir(),
1846                                  "\\share\\claws-mail\\",
1847                                 "ca-certificates.crt",
1848                                 NULL);
1849         return cert_file;
1850 }
1851 #endif
1852
1853 /* Return the filepath of the claws-mail.desktop file */
1854 const gchar *get_desktop_file(void)
1855 {
1856 #ifdef DESKTOPFILEPATH
1857   return DESKTOPFILEPATH;
1858 #else
1859   return NULL;
1860 #endif
1861 }
1862
1863 /* Return the default directory for Plugins. */
1864 const gchar *get_plugin_dir(void)
1865 {
1866 #ifdef G_OS_WIN32
1867         static gchar *plugin_dir = NULL;
1868
1869         if (!plugin_dir)
1870                 plugin_dir = g_strconcat(w32_get_module_dir(),
1871                                          "\\lib\\claws-mail\\plugins\\",
1872                                          NULL);
1873         return plugin_dir;
1874 #else
1875         if (is_dir_exist(PLUGINDIR))
1876                 return PLUGINDIR;
1877         else {
1878                 static gchar *plugin_dir = NULL;
1879                 if (!plugin_dir)
1880                         plugin_dir = g_strconcat(get_rc_dir(),
1881                                 G_DIR_SEPARATOR_S, "plugins",
1882                                 G_DIR_SEPARATOR_S, NULL);
1883                 return plugin_dir;
1884         }
1885 #endif
1886 }
1887
1888
1889 #ifdef G_OS_WIN32
1890 /* Return the default directory for Themes. */
1891 const gchar *w32_get_themes_dir(void)
1892 {
1893         static gchar *themes_dir = NULL;
1894
1895         if (!themes_dir)
1896                 themes_dir = g_strconcat(w32_get_module_dir(),
1897                                          "\\share\\claws-mail\\themes",
1898                                          NULL);
1899         return themes_dir;
1900 }
1901 #endif
1902
1903 const gchar *get_tmp_dir(void)
1904 {
1905         static gchar *tmp_dir = NULL;
1906
1907         if (!tmp_dir)
1908                 tmp_dir = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
1909                                       TMP_DIR, NULL);
1910
1911         return tmp_dir;
1912 }
1913
1914 gchar *get_tmp_file(void)
1915 {
1916         gchar *tmp_file;
1917         static guint32 id = 0;
1918
1919         tmp_file = g_strdup_printf("%s%ctmpfile.%08x",
1920                                    get_tmp_dir(), G_DIR_SEPARATOR, id++);
1921
1922         return tmp_file;
1923 }
1924
1925 const gchar *get_domain_name(void)
1926 {
1927 #ifdef G_OS_UNIX
1928         static gchar *domain_name = NULL;
1929         struct addrinfo hints, *res;
1930         char hostname[256];
1931         int s;
1932
1933         if (!domain_name) {
1934                 if (gethostname(hostname, sizeof(hostname)) != 0) {
1935                         perror("gethostname");
1936                         domain_name = "localhost";
1937                 } else {
1938                         memset(&hints, 0, sizeof(struct addrinfo));
1939                         hints.ai_family = AF_UNSPEC;
1940                         hints.ai_socktype = 0;
1941                         hints.ai_flags = AI_CANONNAME;
1942                         hints.ai_protocol = 0;
1943
1944                         s = getaddrinfo(hostname, NULL, &hints, &res);
1945                         if (s != 0) {
1946                                 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
1947                                 domain_name = g_strdup(hostname);
1948                         } else {
1949                                 domain_name = g_strdup(res->ai_canonname);
1950                                 freeaddrinfo(res);
1951                         }
1952                 }
1953                 debug_print("domain name = %s\n", domain_name);
1954         }
1955
1956         return domain_name;
1957 #else
1958         return "localhost";
1959 #endif
1960 }
1961
1962 /* Tells whether the given host address string is a valid representation of a
1963  * numerical IP (v4 or, if supported, v6) address.
1964  */
1965 gboolean is_numeric_host_address(const gchar *hostaddress)
1966 {
1967         struct addrinfo hints, *res;
1968         int err;
1969
1970         /* See what getaddrinfo makes of the string when told that it is a
1971          * numeric IP address representation. */
1972         memset(&hints, 0, sizeof(struct addrinfo));
1973         hints.ai_family = AF_UNSPEC;
1974         hints.ai_socktype = 0;
1975         hints.ai_flags = AI_NUMERICHOST;
1976         hints.ai_protocol = 0;
1977
1978         err = getaddrinfo(hostaddress, NULL, &hints, &res);
1979         if (err == 0)
1980                 freeaddrinfo(res);
1981
1982         return (err == 0);
1983 }
1984
1985 off_t get_file_size(const gchar *file)
1986 {
1987 #ifdef G_OS_WIN32
1988         GFile *f;
1989         GFileInfo *fi;
1990         GError *error = NULL;
1991         goffset size;
1992
1993         f = g_file_new_for_path(file);
1994         fi = g_file_query_info(f, "standard::size",
1995                         G_FILE_QUERY_INFO_NONE, NULL, &error);
1996         if (error != NULL) {
1997                 debug_print("get_file_size error: %s\n", error->message);
1998                 g_error_free(error);
1999                 g_object_unref(f);
2000                 return -1;
2001         }
2002         size = g_file_info_get_size(fi);
2003         g_object_unref(fi);
2004         g_object_unref(f);
2005         return size;
2006
2007 #else
2008         GStatBuf s;
2009
2010         if (g_stat(file, &s) < 0) {
2011                 FILE_OP_ERROR(file, "stat");
2012                 return -1;
2013         }
2014
2015         return s.st_size;
2016 #endif
2017 }
2018
2019 time_t get_file_mtime(const gchar *file)
2020 {
2021         GStatBuf s;
2022
2023         if (g_stat(file, &s) < 0) {
2024                 FILE_OP_ERROR(file, "stat");
2025                 return -1;
2026         }
2027
2028         return s.st_mtime;
2029 }
2030
2031 gboolean file_exist(const gchar *file, gboolean allow_fifo)
2032 {
2033         GStatBuf s;
2034
2035         if (file == NULL)
2036                 return FALSE;
2037
2038         if (g_stat(file, &s) < 0) {
2039                 if (ENOENT != errno) FILE_OP_ERROR(file, "stat");
2040                 return FALSE;
2041         }
2042
2043         if (S_ISREG(s.st_mode) || (allow_fifo && S_ISFIFO(s.st_mode)))
2044                 return TRUE;
2045
2046         return FALSE;
2047 }
2048
2049
2050 /* Test on whether FILE is a relative file name. This is
2051  * straightforward for Unix but more complex for Windows. */
2052 gboolean is_relative_filename(const gchar *file)
2053 {
2054         if (!file)
2055                 return TRUE;
2056 #ifdef G_OS_WIN32
2057         if ( *file == '\\' && file[1] == '\\' && strchr (file+2, '\\') )
2058                 return FALSE; /* Prefixed with a hostname - this can't
2059                                * be a relative name. */
2060
2061         if ( ((*file >= 'a' && *file <= 'z')
2062               || (*file >= 'A' && *file <= 'Z'))
2063              && file[1] == ':')
2064                 file += 2;  /* Skip drive letter. */
2065
2066         return !(*file == '\\' || *file == '/');
2067 #else
2068         return !(*file == G_DIR_SEPARATOR);
2069 #endif
2070 }
2071
2072
2073 gboolean is_dir_exist(const gchar *dir)
2074 {
2075         if (dir == NULL)
2076                 return FALSE;
2077
2078         return g_file_test(dir, G_FILE_TEST_IS_DIR);
2079 }
2080
2081 gboolean is_file_entry_exist(const gchar *file)
2082 {
2083         if (file == NULL)
2084                 return FALSE;
2085
2086         return g_file_test(file, G_FILE_TEST_EXISTS);
2087 }
2088
2089 gboolean is_file_entry_regular(const gchar *file)
2090 {
2091         if (file == NULL)
2092                 return FALSE;
2093
2094         return g_file_test(file, G_FILE_TEST_IS_REGULAR);
2095 }
2096
2097 gboolean dirent_is_regular_file(struct dirent *d)
2098 {
2099 #if !defined(G_OS_WIN32) && defined(HAVE_DIRENT_D_TYPE)
2100         if (d->d_type == DT_REG)
2101                 return TRUE;
2102         else if (d->d_type != DT_UNKNOWN)
2103                 return FALSE;
2104 #endif
2105
2106         return g_file_test(d->d_name, G_FILE_TEST_IS_REGULAR);
2107 }
2108
2109 gint change_dir(const gchar *dir)
2110 {
2111         gchar *prevdir = NULL;
2112
2113         if (debug_mode)
2114                 prevdir = g_get_current_dir();
2115
2116         if (g_chdir(dir) < 0) {
2117                 FILE_OP_ERROR(dir, "chdir");
2118                 if (debug_mode) g_free(prevdir);
2119                 return -1;
2120         } else if (debug_mode) {
2121                 gchar *cwd;
2122
2123                 cwd = g_get_current_dir();
2124                 if (strcmp(prevdir, cwd) != 0)
2125                         g_print("current dir: %s\n", cwd);
2126                 g_free(cwd);
2127                 g_free(prevdir);
2128         }
2129
2130         return 0;
2131 }
2132
2133 gint make_dir(const gchar *dir)
2134 {
2135         if (g_mkdir(dir, S_IRWXU) < 0) {
2136                 FILE_OP_ERROR(dir, "mkdir");
2137                 return -1;
2138         }
2139         if (g_chmod(dir, S_IRWXU) < 0)
2140                 FILE_OP_ERROR(dir, "chmod");
2141
2142         return 0;
2143 }
2144
2145 gint make_dir_hier(const gchar *dir)
2146 {
2147         gchar *parent_dir;
2148         const gchar *p;
2149
2150         for (p = dir; (p = strchr(p, G_DIR_SEPARATOR)) != NULL; p++) {
2151                 parent_dir = g_strndup(dir, p - dir);
2152                 if (*parent_dir != '\0') {
2153                         if (!is_dir_exist(parent_dir)) {
2154                                 if (make_dir(parent_dir) < 0) {
2155                                         g_free(parent_dir);
2156                                         return -1;
2157                                 }
2158                         }
2159                 }
2160                 g_free(parent_dir);
2161         }
2162
2163         if (!is_dir_exist(dir)) {
2164                 if (make_dir(dir) < 0)
2165                         return -1;
2166         }
2167
2168         return 0;
2169 }
2170
2171 gint remove_all_files(const gchar *dir)
2172 {
2173         GDir *dp;
2174         const gchar *file_name;
2175         gchar *tmp;
2176
2177         if ((dp = g_dir_open(dir, 0, NULL)) == NULL) {
2178                 g_warning("failed to open directory: %s", dir);
2179                 return -1;
2180         }
2181
2182         while ((file_name = g_dir_read_name(dp)) != NULL) {
2183                 tmp = g_strconcat(dir, G_DIR_SEPARATOR_S, file_name, NULL);
2184                 if (claws_unlink(tmp) < 0)
2185                         FILE_OP_ERROR(tmp, "unlink");
2186                 g_free(tmp);
2187         }
2188
2189         g_dir_close(dp);
2190
2191         return 0;
2192 }
2193
2194 gint remove_numbered_files(const gchar *dir, guint first, guint last)
2195 {
2196         GDir *dp;
2197         const gchar *dir_name;
2198         gchar *prev_dir;
2199         gint file_no;
2200
2201         if (first == last) {
2202                 /* Skip all the dir reading part. */
2203                 gchar *filename = g_strdup_printf("%s%s%u", dir, G_DIR_SEPARATOR_S, first);
2204                 if (is_dir_exist(filename)) {
2205                         /* a numbered directory with this name exists,
2206                          * remove the dot-file instead */
2207                         g_free(filename);
2208                         filename = g_strdup_printf("%s%s.%u", dir, G_DIR_SEPARATOR_S, first);
2209                 }
2210                 if (claws_unlink(filename) < 0) {
2211                         FILE_OP_ERROR(filename, "unlink");
2212                         g_free(filename);
2213                         return -1;
2214                 }
2215                 g_free(filename);
2216                 return 0;
2217         }
2218
2219         prev_dir = g_get_current_dir();
2220
2221         if (g_chdir(dir) < 0) {
2222                 FILE_OP_ERROR(dir, "chdir");
2223                 g_free(prev_dir);
2224                 return -1;
2225         }
2226
2227         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2228                 g_warning("failed to open directory: %s", dir);
2229                 g_free(prev_dir);
2230                 return -1;
2231         }
2232
2233         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2234                 file_no = to_number(dir_name);
2235                 if (file_no > 0 && first <= file_no && file_no <= last) {
2236                         if (is_dir_exist(dir_name)) {
2237                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2238                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2239                                         FILE_OP_ERROR(dot_file, "unlink");
2240                                 }
2241                                 g_free(dot_file);
2242                                 continue;
2243                         }
2244                         if (claws_unlink(dir_name) < 0)
2245                                 FILE_OP_ERROR(dir_name, "unlink");
2246                 }
2247         }
2248
2249         g_dir_close(dp);
2250
2251         if (g_chdir(prev_dir) < 0) {
2252                 FILE_OP_ERROR(prev_dir, "chdir");
2253                 g_free(prev_dir);
2254                 return -1;
2255         }
2256
2257         g_free(prev_dir);
2258
2259         return 0;
2260 }
2261
2262 gint remove_numbered_files_not_in_list(const gchar *dir, GSList *numberlist)
2263 {
2264         GDir *dp;
2265         const gchar *dir_name;
2266         gchar *prev_dir;
2267         gint file_no;
2268         GHashTable *wanted_files;
2269         GSList *cur;
2270         GError *error = NULL;
2271
2272         if (numberlist == NULL)
2273             return 0;
2274
2275         prev_dir = g_get_current_dir();
2276
2277         if (g_chdir(dir) < 0) {
2278                 FILE_OP_ERROR(dir, "chdir");
2279                 g_free(prev_dir);
2280                 return -1;
2281         }
2282
2283         if ((dp = g_dir_open(".", 0, &error)) == NULL) {
2284                 g_message("Couldn't open current directory: %s (%d).\n",
2285                                 error->message, error->code);
2286                 g_error_free(error);
2287                 g_free(prev_dir);
2288                 return -1;
2289         }
2290
2291         wanted_files = g_hash_table_new(g_direct_hash, g_direct_equal);
2292         for (cur = numberlist; cur != NULL; cur = cur->next) {
2293                 /* numberlist->data is expected to be GINT_TO_POINTER */
2294                 g_hash_table_insert(wanted_files, cur->data, GINT_TO_POINTER(1));
2295         }
2296
2297         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2298                 file_no = to_number(dir_name);
2299                 if (is_dir_exist(dir_name))
2300                         continue;
2301                 if (file_no > 0 && g_hash_table_lookup(wanted_files, GINT_TO_POINTER(file_no)) == NULL) {
2302                         debug_print("removing unwanted file %d from %s\n", file_no, dir);
2303                         if (is_dir_exist(dir_name)) {
2304                                 gchar *dot_file = g_strdup_printf(".%s", dir_name);
2305                                 if (is_file_exist(dot_file) && claws_unlink(dot_file) < 0) {
2306                                         FILE_OP_ERROR(dot_file, "unlink");
2307                                 }
2308                                 g_free(dot_file);
2309                                 continue;
2310                         }
2311                         if (claws_unlink(dir_name) < 0)
2312                                 FILE_OP_ERROR(dir_name, "unlink");
2313                 }
2314         }
2315
2316         g_dir_close(dp);
2317         g_hash_table_destroy(wanted_files);
2318
2319         if (g_chdir(prev_dir) < 0) {
2320                 FILE_OP_ERROR(prev_dir, "chdir");
2321                 g_free(prev_dir);
2322                 return -1;
2323         }
2324
2325         g_free(prev_dir);
2326
2327         return 0;
2328 }
2329
2330 gint remove_all_numbered_files(const gchar *dir)
2331 {
2332         return remove_numbered_files(dir, 0, UINT_MAX);
2333 }
2334
2335 gint remove_dir_recursive(const gchar *dir)
2336 {
2337         GStatBuf s;
2338         GDir *dp;
2339         const gchar *dir_name;
2340         gchar *prev_dir;
2341
2342         if (g_stat(dir, &s) < 0) {
2343                 FILE_OP_ERROR(dir, "stat");
2344                 if (ENOENT == errno) return 0;
2345                 return -(errno);
2346         }
2347
2348         if (!S_ISDIR(s.st_mode)) {
2349                 if (claws_unlink(dir) < 0) {
2350                         FILE_OP_ERROR(dir, "unlink");
2351                         return -(errno);
2352                 }
2353
2354                 return 0;
2355         }
2356
2357         prev_dir = g_get_current_dir();
2358         /* g_print("prev_dir = %s\n", prev_dir); */
2359
2360         if (!path_cmp(prev_dir, dir)) {
2361                 g_free(prev_dir);
2362                 if (g_chdir("..") < 0) {
2363                         FILE_OP_ERROR(dir, "chdir");
2364                         return -(errno);
2365                 }
2366                 prev_dir = g_get_current_dir();
2367         }
2368
2369         if (g_chdir(dir) < 0) {
2370                 FILE_OP_ERROR(dir, "chdir");
2371                 g_free(prev_dir);
2372                 return -(errno);
2373         }
2374
2375         if ((dp = g_dir_open(".", 0, NULL)) == NULL) {
2376                 g_warning("failed to open directory: %s", dir);
2377                 g_chdir(prev_dir);
2378                 g_free(prev_dir);
2379                 return -(errno);
2380         }
2381
2382         /* remove all files in the directory */
2383         while ((dir_name = g_dir_read_name(dp)) != NULL) {
2384                 /* g_print("removing %s\n", dir_name); */
2385
2386                 if (is_dir_exist(dir_name)) {
2387                         gint ret;
2388
2389                         if ((ret = remove_dir_recursive(dir_name)) < 0) {
2390                                 g_warning("can't remove directory: %s", dir_name);
2391                                 g_dir_close(dp);
2392                                 return ret;
2393                         }
2394                 } else {
2395                         if (claws_unlink(dir_name) < 0)
2396                                 FILE_OP_ERROR(dir_name, "unlink");
2397                 }
2398         }
2399
2400         g_dir_close(dp);
2401
2402         if (g_chdir(prev_dir) < 0) {
2403                 FILE_OP_ERROR(prev_dir, "chdir");
2404                 g_free(prev_dir);
2405                 return -(errno);
2406         }
2407
2408         g_free(prev_dir);
2409
2410         if (g_rmdir(dir) < 0) {
2411                 FILE_OP_ERROR(dir, "rmdir");
2412                 return -(errno);
2413         }
2414
2415         return 0;
2416 }
2417
2418 /* convert line endings into CRLF. If the last line doesn't end with
2419  * linebreak, add it.
2420  */
2421 gchar *canonicalize_str(const gchar *str)
2422 {
2423         const gchar *p;
2424         guint new_len = 0;
2425         gchar *out, *outp;
2426
2427         for (p = str; *p != '\0'; ++p) {
2428                 if (*p != '\r') {
2429                         ++new_len;
2430                         if (*p == '\n')
2431                                 ++new_len;
2432                 }
2433         }
2434         if (p == str || *(p - 1) != '\n')
2435                 new_len += 2;
2436
2437         out = outp = g_malloc(new_len + 1);
2438         for (p = str; *p != '\0'; ++p) {
2439                 if (*p != '\r') {
2440                         if (*p == '\n')
2441                                 *outp++ = '\r';
2442                         *outp++ = *p;
2443                 }
2444         }
2445         if (p == str || *(p - 1) != '\n') {
2446                 *outp++ = '\r';
2447                 *outp++ = '\n';
2448         }
2449         *outp = '\0';
2450
2451         return out;
2452 }
2453
2454 gchar *normalize_newlines(const gchar *str)
2455 {
2456         const gchar *p;
2457         gchar *out, *outp;
2458
2459         out = outp = g_malloc(strlen(str) + 1);
2460         for (p = str; *p != '\0'; ++p) {
2461                 if (*p == '\r') {
2462                         if (*(p + 1) != '\n')
2463                                 *outp++ = '\n';
2464                 } else
2465                         *outp++ = *p;
2466         }
2467
2468         *outp = '\0';
2469
2470         return out;
2471 }
2472
2473 gchar *get_outgoing_rfc2822_str(FILE *fp)
2474 {
2475         gchar buf[BUFFSIZE];
2476         GString *str;
2477         gchar *ret;
2478
2479         str = g_string_new(NULL);
2480
2481         /* output header part */
2482         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2483                 strretchomp(buf);
2484                 if (!g_ascii_strncasecmp(buf, "Bcc:", 4)) {
2485                         gint next;
2486
2487                         for (;;) {
2488                                 next = fgetc(fp);
2489                                 if (next == EOF)
2490                                         break;
2491                                 else if (next != ' ' && next != '\t') {
2492                                         ungetc(next, fp);
2493                                         break;
2494                                 }
2495                                 if (claws_fgets(buf, sizeof(buf), fp) == NULL)
2496                                         break;
2497                         }
2498                 } else {
2499                         g_string_append(str, buf);
2500                         g_string_append(str, "\r\n");
2501                         if (buf[0] == '\0')
2502                                 break;
2503                 }
2504         }
2505
2506         /* output body part */
2507         while (claws_fgets(buf, sizeof(buf), fp) != NULL) {
2508                 strretchomp(buf);
2509                 if (buf[0] == '.')
2510                         g_string_append_c(str, '.');
2511                 g_string_append(str, buf);
2512                 g_string_append(str, "\r\n");
2513         }
2514
2515         ret = str->str;
2516         g_string_free(str, FALSE);
2517
2518         return ret;
2519 }
2520
2521 /*
2522  * Create a new boundary in a way that it is very unlikely that this
2523  * will occur in the following text.  It would be easy to ensure
2524  * uniqueness if everything is either quoted-printable or base64
2525  * encoded (note that conversion is allowed), but because MIME bodies
2526  * may be nested, it may happen that the same boundary has already
2527  * been used.
2528  *
2529  *   boundary := 0*69<bchars> bcharsnospace
2530  *   bchars := bcharsnospace / " "
2531  *   bcharsnospace := DIGIT / ALPHA / "'" / "(" / ")" /
2532  *                  "+" / "_" / "," / "-" / "." /
2533  *                  "/" / ":" / "=" / "?"
2534  *
2535  * some special characters removed because of buggy MTAs
2536  */
2537
2538 gchar *generate_mime_boundary(const gchar *prefix)
2539 {
2540         static gchar tbl[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
2541                              "abcdefghijklmnopqrstuvwxyz"
2542                              "1234567890+_./=";
2543         gchar buf_uniq[24];
2544         gint i;
2545
2546         for (i = 0; i < sizeof(buf_uniq) - 1; i++)
2547                 buf_uniq[i] = tbl[g_random_int_range(0, sizeof(tbl) - 1)];
2548         buf_uniq[i] = '\0';
2549
2550         return g_strdup_printf("%s_/%s", prefix ? prefix : "MP",
2551                                buf_uniq);
2552 }
2553
2554 char *fgets_crlf(char *buf, int size, FILE *stream)
2555 {
2556         gboolean is_cr = FALSE;
2557         gboolean last_was_cr = FALSE;
2558         int c = 0;
2559         char *cs;
2560
2561         cs = buf;
2562         while (--size > 0 && (c = getc(stream)) != EOF)
2563         {
2564                 *cs++ = c;
2565                 is_cr = (c == '\r');
2566                 if (c == '\n') {
2567                         break;
2568                 }
2569                 if (last_was_cr) {
2570                         *(--cs) = '\n';
2571                         cs++;
2572                         ungetc(c, stream);
2573                         break;
2574                 }
2575                 last_was_cr = is_cr;
2576         }
2577         if (c == EOF && cs == buf)
2578                 return NULL;
2579
2580         *cs = '\0';
2581
2582         return buf;
2583 }
2584
2585 static gint execute_async(gchar *const argv[], const gchar *working_directory)
2586 {
2587         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
2588
2589         if (g_spawn_async(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
2590                           NULL, NULL, NULL, FALSE) == FALSE) {
2591                 g_warning("couldn't execute command: %s", argv[0]);
2592                 return -1;
2593         }
2594
2595         return 0;
2596 }
2597
2598 static gint execute_sync(gchar *const argv[], const gchar *working_directory)
2599 {
2600         gint status;
2601
2602         cm_return_val_if_fail(argv != NULL && argv[0] != NULL, -1);
2603
2604 #ifdef G_OS_UNIX
2605         if (g_spawn_sync(working_directory, (gchar **)argv, NULL, G_SPAWN_SEARCH_PATH,
2606                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
2607                 g_warning("couldn't execute command: %s", argv[0]);
2608                 return -1;
2609         }
2610
2611         if (WIFEXITED(status))
2612                 return WEXITSTATUS(status);
2613         else
2614                 return -1;
2615 #else
2616         if (g_spawn_sync(working_directory, (gchar **)argv, NULL,
2617                                 G_SPAWN_SEARCH_PATH|
2618                                 G_SPAWN_CHILD_INHERITS_STDIN|
2619                                 G_SPAWN_LEAVE_DESCRIPTORS_OPEN,
2620                          NULL, NULL, NULL, NULL, &status, NULL) == FALSE) {
2621                 g_warning("couldn't execute command: %s", argv[0]);
2622                 return -1;
2623         }
2624
2625         return status;
2626 #endif
2627 }
2628
2629 gint execute_command_line(const gchar *cmdline, gboolean async,
2630                 const gchar *working_directory)
2631 {
2632         gchar **argv;
2633         gint ret;
2634
2635         cm_return_val_if_fail(cmdline != NULL, -1);
2636
2637         debug_print("execute_command_line(): executing: %s\n", cmdline);
2638
2639         argv = strsplit_with_quote(cmdline, " ", 0);
2640
2641         if (async)
2642                 ret = execute_async(argv, working_directory);
2643         else
2644                 ret = execute_sync(argv, working_directory);
2645
2646         g_strfreev(argv);
2647
2648         return ret;
2649 }
2650
2651 gchar *get_command_output(const gchar *cmdline)
2652 {
2653         gchar *child_stdout;
2654         gint status;
2655
2656         cm_return_val_if_fail(cmdline != NULL, NULL);
2657
2658         debug_print("get_command_output(): executing: %s\n", cmdline);
2659
2660         if (g_spawn_command_line_sync(cmdline, &child_stdout, NULL, &status,
2661                                       NULL) == FALSE) {
2662                 g_warning("couldn't execute command: %s", cmdline);
2663                 return NULL;
2664         }
2665
2666         return child_stdout;
2667 }
2668
2669 FILE *get_command_output_stream(const char* cmdline)
2670 {
2671     GPid pid;
2672         GError *err = NULL;
2673         gchar **argv = NULL;
2674     int fd;
2675
2676         cm_return_val_if_fail(cmdline != NULL, NULL);
2677
2678         debug_print("get_command_output_stream(): executing: %s\n", cmdline);
2679
2680         /* turn the command-line string into an array */
2681         if (!g_shell_parse_argv(cmdline, NULL, &argv, &err)) {
2682                 g_warning("could not parse command line from '%s': %s", cmdline, err->message);
2683         g_error_free(err);
2684                 return NULL;
2685         }
2686
2687     if (!g_spawn_async_with_pipes(NULL, argv, NULL, G_SPAWN_SEARCH_PATH,
2688                                   NULL, NULL, &pid, NULL, &fd, NULL, &err)
2689         && err)
2690     {
2691         g_warning("could not spawn '%s': %s", cmdline, err->message);
2692         g_error_free(err);
2693                 g_strfreev(argv);
2694         return NULL;
2695     }
2696
2697         g_strfreev(argv);
2698         return fdopen(fd, "r");
2699 }
2700
2701 #ifndef G_OS_WIN32
2702 static gint is_unchanged_uri_char(char c)
2703 {
2704         switch (c) {
2705                 case '(':
2706                 case ')':
2707                         return 0;
2708                 default:
2709                         return 1;
2710         }
2711 }
2712
2713 static void encode_uri(gchar *encoded_uri, gint bufsize, const gchar *uri)
2714 {
2715         int i;
2716         int k;
2717
2718         k = 0;
2719         for(i = 0; i < strlen(uri) ; i++) {
2720                 if (is_unchanged_uri_char(uri[i])) {
2721                         if (k + 2 >= bufsize)
2722                                 break;
2723                         encoded_uri[k++] = uri[i];
2724                 }
2725                 else {
2726                         char * hexa = "0123456789ABCDEF";
2727
2728                         if (k + 4 >= bufsize)
2729                                 break;
2730                         encoded_uri[k++] = '%';
2731                         encoded_uri[k++] = hexa[uri[i] / 16];
2732                         encoded_uri[k++] = hexa[uri[i] % 16];
2733                 }
2734         }
2735         encoded_uri[k] = 0;
2736 }
2737 #endif
2738
2739 gint open_uri(const gchar *uri, const gchar *cmdline)
2740 {
2741
2742 #ifndef G_OS_WIN32
2743         gchar buf[BUFFSIZE];
2744         gchar *p;
2745         gchar encoded_uri[BUFFSIZE];
2746         cm_return_val_if_fail(uri != NULL, -1);
2747
2748         /* an option to choose whether to use encode_uri or not ? */
2749         encode_uri(encoded_uri, BUFFSIZE, uri);
2750
2751         if (cmdline &&
2752             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2753             !strchr(p + 2, '%'))
2754                 g_snprintf(buf, sizeof(buf), cmdline, encoded_uri);
2755         else {
2756                 if (cmdline)
2757                         g_warning("Open URI command-line is invalid "
2758                                   "(there must be only one '%%s'): %s",
2759                                   cmdline);
2760                 g_snprintf(buf, sizeof(buf), DEFAULT_BROWSER_CMD, encoded_uri);
2761         }
2762
2763         execute_command_line(buf, TRUE, NULL);
2764 #else
2765         ShellExecute(NULL, "open", uri, NULL, NULL, SW_SHOW);
2766 #endif
2767         return 0;
2768 }
2769
2770 gint open_txt_editor(const gchar *filepath, const gchar *cmdline)
2771 {
2772         gchar buf[BUFFSIZE];
2773         gchar *p;
2774
2775         cm_return_val_if_fail(filepath != NULL, -1);
2776
2777         if (cmdline &&
2778             (p = strchr(cmdline, '%')) && *(p + 1) == 's' &&
2779             !strchr(p + 2, '%'))
2780                 g_snprintf(buf, sizeof(buf), cmdline, filepath);
2781         else {
2782                 if (cmdline)
2783                         g_warning("Open Text Editor command-line is invalid "
2784                                   "(there must be only one '%%s'): %s",
2785                                   cmdline);
2786                 g_snprintf(buf, sizeof(buf), DEFAULT_EDITOR_CMD, filepath);
2787         }
2788
2789         execute_command_line(buf, TRUE, NULL);
2790
2791         return 0;
2792 }
2793
2794 time_t remote_tzoffset_sec(const gchar *zone)
2795 {
2796         static gchar ustzstr[] = "PSTPDTMSTMDTCSTCDTESTEDT";
2797         gchar zone3[4];
2798         gchar *p;
2799         gchar c;
2800         gint iustz;
2801         gint offset;
2802         time_t remoteoffset;
2803
2804         strncpy(zone3, zone, 3);
2805         zone3[3] = '\0';
2806         remoteoffset = 0;
2807
2808         if (sscanf(zone, "%c%d", &c, &offset) == 2 &&
2809             (c == '+' || c == '-')) {
2810                 remoteoffset = ((offset / 100) * 60 + (offset % 100)) * 60;
2811                 if (c == '-')
2812                         remoteoffset = -remoteoffset;
2813         } else if (!strncmp(zone, "UT" , 2) ||
2814                    !strncmp(zone, "GMT", 3)) {
2815                 remoteoffset = 0;
2816         } else if (strlen(zone3) == 3) {
2817                 for (p = ustzstr; *p != '\0'; p += 3) {
2818                         if (!g_ascii_strncasecmp(p, zone3, 3)) {
2819                                 iustz = ((gint)(p - ustzstr) / 3 + 1) / 2 - 8;
2820                                 remoteoffset = iustz * 3600;
2821                                 break;
2822                         }
2823                 }
2824                 if (*p == '\0')
2825                         return -1;
2826         } else if (strlen(zone3) == 1) {
2827                 switch (zone[0]) {
2828                 case 'Z': remoteoffset =   0; break;
2829                 case 'A': remoteoffset =  -1; break;
2830                 case 'B': remoteoffset =  -2; break;
2831                 case 'C': remoteoffset =  -3; break;
2832                 case 'D': remoteoffset =  -4; break;
2833                 case 'E': remoteoffset =  -5; break;
2834                 case 'F': remoteoffset =  -6; break;
2835                 case 'G': remoteoffset =  -7; break;
2836                 case 'H': remoteoffset =  -8; break;
2837                 case 'I': remoteoffset =  -9; break;
2838                 case 'K': remoteoffset = -10; break; /* J is not used */
2839                 case 'L': remoteoffset = -11; break;
2840                 case 'M': remoteoffset = -12; break;
2841                 case 'N': remoteoffset =   1; break;
2842                 case 'O': remoteoffset =   2; break;
2843                 case 'P': remoteoffset =   3; break;
2844                 case 'Q': remoteoffset =   4; break;
2845                 case 'R': remoteoffset =   5; break;
2846                 case 'S': remoteoffset =   6; break;
2847                 case 'T': remoteoffset =   7; break;
2848                 case 'U': remoteoffset =   8; break;
2849                 case 'V': remoteoffset =   9; break;
2850                 case 'W': remoteoffset =  10; break;
2851                 case 'X': remoteoffset =  11; break;
2852                 case 'Y': remoteoffset =  12; break;
2853                 default:  remoteoffset =   0; break;
2854                 }
2855                 remoteoffset = remoteoffset * 3600;
2856         } else
2857                 return -1;
2858
2859         return remoteoffset;
2860 }
2861
2862 time_t tzoffset_sec(time_t *now)
2863 {
2864         struct tm gmt, *lt;
2865         gint off;
2866         struct tm buf1, buf2;
2867 #ifdef G_OS_WIN32
2868         if (now && *now < 0)
2869                 return 0;
2870 #endif
2871         gmt = *gmtime_r(now, &buf1);
2872         lt = localtime_r(now, &buf2);
2873
2874         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2875
2876         if (lt->tm_year < gmt.tm_year)
2877                 off -= 24 * 60;
2878         else if (lt->tm_year > gmt.tm_year)
2879                 off += 24 * 60;
2880         else if (lt->tm_yday < gmt.tm_yday)
2881                 off -= 24 * 60;
2882         else if (lt->tm_yday > gmt.tm_yday)
2883                 off += 24 * 60;
2884
2885         if (off >= 24 * 60)             /* should be impossible */
2886                 off = 23 * 60 + 59;     /* if not, insert silly value */
2887         if (off <= -24 * 60)
2888                 off = -(23 * 60 + 59);
2889
2890         return off * 60;
2891 }
2892
2893 /* calculate timezone offset */
2894 gchar *tzoffset(time_t *now)
2895 {
2896         static gchar offset_string[6];
2897         struct tm gmt, *lt;
2898         gint off;
2899         gchar sign = '+';
2900         struct tm buf1, buf2;
2901 #ifdef G_OS_WIN32
2902         if (now && *now < 0)
2903                 return 0;
2904 #endif
2905         gmt = *gmtime_r(now, &buf1);
2906         lt = localtime_r(now, &buf2);
2907
2908         off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
2909
2910         if (lt->tm_year < gmt.tm_year)
2911                 off -= 24 * 60;
2912         else if (lt->tm_year > gmt.tm_year)
2913                 off += 24 * 60;
2914         else if (lt->tm_yday < gmt.tm_yday)
2915                 off -= 24 * 60;
2916         else if (lt->tm_yday > gmt.tm_yday)
2917                 off += 24 * 60;
2918
2919         if (off < 0) {
2920                 sign = '-';
2921                 off = -off;
2922         }
2923
2924         if (off >= 24 * 60)             /* should be impossible */
2925                 off = 23 * 60 + 59;     /* if not, insert silly value */
2926
2927         sprintf(offset_string, "%c%02d%02d", sign, off / 60, off % 60);
2928
2929         return offset_string;
2930 }
2931
2932 static void _get_rfc822_date(gchar *buf, gint len, gboolean hidetz)
2933 {
2934         struct tm *lt;
2935         time_t t;
2936         gchar day[4], mon[4];
2937         gint dd, hh, mm, ss, yyyy;
2938         struct tm buf1;
2939         gchar buf2[RFC822_DATE_BUFFSIZE];
2940
2941         t = time(NULL);
2942         if (hidetz)
2943                 lt = gmtime_r(&t, &buf1);
2944         else
2945                 lt = localtime_r(&t, &buf1);
2946
2947         if (sscanf(asctime_r(lt, buf2), "%3s %3s %d %d:%d:%d %d\n",
2948                day, mon, &dd, &hh, &mm, &ss, &yyyy) != 7)
2949                 g_warning("failed reading date/time");
2950
2951         g_snprintf(buf, len, "%s, %d %s %d %02d:%02d:%02d %s",
2952                    day, dd, mon, yyyy, hh, mm, ss, (hidetz? "-0000": tzoffset(&t)));
2953 }
2954
2955 void get_rfc822_date(gchar *buf, gint len)
2956 {
2957         _get_rfc822_date(buf, len, FALSE);
2958 }
2959
2960 void get_rfc822_date_hide_tz(gchar *buf, gint len)
2961 {
2962         _get_rfc822_date(buf, len, TRUE);
2963 }
2964
2965 void debug_set_mode(gboolean mode)
2966 {
2967         debug_mode = mode;
2968 }
2969
2970 gboolean debug_get_mode(void)
2971 {
2972         return debug_mode;
2973 }
2974
2975 #ifdef HAVE_VA_OPT
2976 void debug_print_real(const char *file, int line, const gchar *format, ...)
2977 {
2978         va_list args;
2979         gchar buf[BUFFSIZE];
2980         gint prefix_len;
2981
2982         if (!debug_mode) return;
2983
2984         prefix_len = g_snprintf(buf, sizeof(buf), "%s:%d:", debug_srcname(file), line);
2985
2986         va_start(args, format);
2987         g_vsnprintf(buf + prefix_len, sizeof(buf) - prefix_len, format, args);
2988         va_end(args);
2989
2990         g_print("%s", buf);
2991 }
2992 #else
2993 void debug_print_real(const gchar *format, ...)
2994 {
2995         va_list args;
2996         gchar buf[BUFFSIZE];
2997
2998         if (!debug_mode) return;
2999
3000         va_start(args, format);
3001         g_vsnprintf(buf, sizeof(buf), format, args);
3002         va_end(args);
3003
3004         g_print("%s", buf);
3005 }
3006 #endif
3007
3008
3009 const char * debug_srcname(const char *file)
3010 {
3011         const char *s = strrchr (file, '/');
3012         return s? s+1:file;
3013 }
3014
3015
3016 void * subject_table_lookup(GHashTable *subject_table, gchar * subject)
3017 {
3018         if (subject == NULL)
3019                 subject = "";
3020         else
3021                 subject += subject_get_prefix_length(subject);
3022
3023         return g_hash_table_lookup(subject_table, subject);
3024 }
3025
3026 void subject_table_insert(GHashTable *subject_table, gchar * subject,
3027                           void * data)
3028 {
3029         if (subject == NULL || *subject == 0)
3030                 return;
3031         subject += subject_get_prefix_length(subject);
3032         g_hash_table_insert(subject_table, subject, data);
3033 }
3034
3035 void subject_table_remove(GHashTable *subject_table, gchar * subject)
3036 {
3037         if (subject == NULL)
3038                 return;
3039
3040         subject += subject_get_prefix_length(subject);
3041         g_hash_table_remove(subject_table, subject);
3042 }
3043
3044 static regex_t u_regex;
3045 static gboolean u_init_;
3046
3047 void utils_free_regex(void)
3048 {
3049         if (u_init_) {
3050                 regfree(&u_regex);
3051                 u_init_ = FALSE;
3052         }
3053 }
3054
3055 /*!
3056  *\brief        Check if a string is prefixed with known (combinations)
3057  *              of prefixes. The function assumes that each prefix
3058  *              is terminated by zero or exactly _one_ space.
3059  *
3060  *\param        str String to check for a prefixes
3061  *
3062  *\return       int Number of chars in the prefix that should be skipped
3063  *              for a "clean" subject line. If no prefix was found, 0
3064  *              is returned.
3065  */
3066 int subject_get_prefix_length(const gchar *subject)
3067 {
3068         /*!< Array with allowable reply prefixes regexps. */
3069         static const gchar * const prefixes[] = {
3070                 "Re\\:",                        /* "Re:" */
3071                 "Re\\[[1-9][0-9]*\\]\\:",       /* "Re[XXX]:" (non-conforming news mail clients) */
3072                 "Antw\\:",                      /* "Antw:" (Dutch / German Outlook) */
3073                 "Aw\\:",                        /* "Aw:"   (German) */
3074                 "Antwort\\:",                   /* "Antwort:" (German Lotus Notes) */
3075                 "Res\\:",                       /* "Res:" (Spanish/Brazilian Outlook) */
3076                 "Fw\\:",                        /* "Fw:" Forward */
3077                 "Fwd\\:",                       /* "Fwd:" Forward */
3078                 "Enc\\:",                       /* "Enc:" Forward (Brazilian Outlook) */
3079                 "Odp\\:",                       /* "Odp:" Re (Polish Outlook) */
3080                 "Rif\\:",                       /* "Rif:" (Italian Outlook) */
3081                 "Sv\\:",                        /* "Sv" (Norwegian) */
3082                 "Vs\\:",                        /* "Vs" (Norwegian) */
3083                 "Ad\\:",                        /* "Ad" (Norwegian) */
3084                 "\347\255\224\345\244\215\\:",  /* "Re" (Chinese, UTF-8) */
3085                 "R\303\251f\\. \\:",            /* "R�f. :" (French Lotus Notes) */
3086                 "Re \\:",                       /* "Re :" (French Yahoo Mail) */
3087                 /* add more */
3088         };
3089         const int PREFIXES = sizeof prefixes / sizeof prefixes[0];
3090         int n;
3091         regmatch_t pos;
3092
3093         if (!subject) return 0;
3094         if (!*subject) return 0;
3095
3096         if (!u_init_) {
3097                 GString *s = g_string_new("");
3098
3099                 for (n = 0; n < PREFIXES; n++)
3100                         /* Terminate each prefix regexpression by a
3101                          * "\ ?" (zero or ONE space), and OR them */
3102                         g_string_append_printf(s, "(%s\\ ?)%s",
3103                                           prefixes[n],
3104                                           n < PREFIXES - 1 ?
3105                                           "|" : "");
3106
3107                 g_string_prepend(s, "(");
3108                 g_string_append(s, ")+");       /* match at least once */
3109                 g_string_prepend(s, "^\\ *");   /* from beginning of line */
3110
3111
3112                 /* We now have something like "^\ *((PREFIX1\ ?)|(PREFIX2\ ?))+"
3113                  * TODO: Should this be       "^\ *(((PREFIX1)|(PREFIX2))\ ?)+" ??? */
3114                 if (regcomp(&u_regex, s->str, REG_EXTENDED | REG_ICASE)) {
3115                         debug_print("Error compiling regexp %s\n", s->str);
3116                         g_string_free(s, TRUE);
3117                         return 0;
3118                 } else {
3119                         u_init_ = TRUE;
3120                         g_string_free(s, TRUE);
3121                 }
3122         }
3123
3124         if (!regexec(&u_regex, subject, 1, &pos, 0) && pos.rm_so != -1)
3125                 return pos.rm_eo;
3126         else
3127                 return 0;
3128 }
3129
3130 static guint g_stricase_hash(gconstpointer gptr)
3131 {
3132         guint hash_result = 0;
3133         const char *str;
3134
3135         for (str = gptr; str && *str; str++) {
3136                 hash_result += toupper(*str);
3137         }
3138
3139         return hash_result;
3140 }
3141
3142 static gint g_stricase_equal(gconstpointer gptr1, gconstpointer gptr2)
3143 {
3144         const char *str1 = gptr1;
3145         const char *str2 = gptr2;
3146
3147         return !strcasecmp(str1, str2);
3148 }
3149
3150 gint g_int_compare(gconstpointer a, gconstpointer b)
3151 {
3152         return GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b);
3153 }
3154
3155 /*
3156    quote_cmd_argument()
3157
3158    return a quoted string safely usable in argument of a command.
3159
3160    code is extracted and adapted from etPan! project -- DINH V. Ho�.
3161 */
3162
3163 gint quote_cmd_argument(gchar * result, guint size,
3164                         const gchar * path)
3165 {
3166         const gchar * p;
3167         gchar * result_p;
3168         guint remaining;
3169
3170         result_p = result;
3171         remaining = size;
3172
3173         for(p = path ; * p != '\0' ; p ++) {
3174
3175                 if (isalnum((guchar)*p) || (* p == '/')) {
3176                         if (remaining > 0) {
3177                                 * result_p = * p;
3178                                 result_p ++;
3179                                 remaining --;
3180                         }
3181                         else {
3182                                 result[size - 1] = '\0';
3183                                 return -1;
3184                         }
3185                 }
3186                 else {
3187                         if (remaining >= 2) {
3188                                 * result_p = '\\';
3189                                 result_p ++;
3190                                 * result_p = * p;
3191                                 result_p ++;
3192                                 remaining -= 2;
3193                         }
3194                         else {
3195                                 result[size - 1] = '\0';
3196                                 return -1;
3197                         }
3198                 }
3199         }
3200         if (remaining > 0) {
3201                 * result_p = '\0';
3202         }
3203         else {
3204                 result[size - 1] = '\0';
3205                 return -1;
3206         }
3207
3208         return 0;
3209 }
3210
3211 typedef struct
3212 {
3213         GNode           *parent;
3214         GNodeMapFunc     func;
3215         gpointer         data;
3216 } GNodeMapData;
3217
3218 static void g_node_map_recursive(GNode *node, gpointer data)
3219 {
3220         GNodeMapData *mapdata = (GNodeMapData *) data;
3221         GNode *newnode;
3222         GNodeMapData newmapdata;
3223         gpointer newdata;
3224
3225         newdata = mapdata->func(node->data, mapdata->data);
3226         if (newdata != NULL) {
3227                 newnode = g_node_new(newdata);
3228                 g_node_append(mapdata->parent, newnode);
3229
3230                 newmapdata.parent = newnode;
3231                 newmapdata.func = mapdata->func;
3232                 newmapdata.data = mapdata->data;
3233
3234                 g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &newmapdata);
3235         }
3236 }
3237
3238 GNode *g_node_map(GNode *node, GNodeMapFunc func, gpointer data)
3239 {
3240         GNode *root;
3241         GNodeMapData mapdata;
3242
3243         cm_return_val_if_fail(node != NULL, NULL);
3244         cm_return_val_if_fail(func != NULL, NULL);
3245
3246         root = g_node_new(func(node->data, data));
3247
3248         mapdata.parent = root;
3249         mapdata.func = func;
3250         mapdata.data = data;
3251
3252         g_node_children_foreach(node, G_TRAVERSE_ALL, g_node_map_recursive, &mapdata);
3253
3254         return root;
3255 }
3256
3257 #define HEX_TO_INT(val, hex)                    \
3258 {                                               \
3259         gchar c = hex;                          \
3260                                                 \
3261         if ('0' <= c && c <= '9') {             \
3262                 val = c - '0';                  \
3263         } else if ('a' <= c && c <= 'f') {      \
3264                 val = c - 'a' + 10;             \
3265         } else if ('A' <= c && c <= 'F') {      \
3266                 val = c - 'A' + 10;             \
3267         } else {                                \
3268                 val = -1;                       \
3269         }                                       \
3270 }
3271
3272 gboolean get_hex_value(guchar *out, gchar c1, gchar c2)
3273 {
3274         gint hi, lo;
3275
3276         HEX_TO_INT(hi, c1);
3277         HEX_TO_INT(lo, c2);
3278
3279         if (hi == -1 || lo == -1)
3280                 return FALSE;
3281
3282         *out = (hi << 4) + lo;
3283         return TRUE;
3284 }
3285
3286 #define INT_TO_HEX(hex, val)            \
3287 {                                       \
3288         if ((val) < 10)                 \
3289                 hex = '0' + (val);      \
3290         else                            \
3291                 hex = 'A' + (val) - 10; \
3292 }
3293
3294 void get_hex_str(gchar *out, guchar ch)
3295 {
3296         gchar hex;
3297
3298         INT_TO_HEX(hex, ch >> 4);
3299         *out++ = hex;
3300         INT_TO_HEX(hex, ch & 0x0f);
3301         *out   = hex;
3302 }
3303
3304 #undef REF_DEBUG
3305 #ifndef REF_DEBUG
3306 #define G_PRINT_REF 1 == 1 ? (void) 0 : (void)
3307 #else
3308 #define G_PRINT_REF g_print
3309 #endif
3310
3311 /*!
3312  *\brief        Register ref counted pointer. It is based on GBoxed, so should
3313  *              work with anything that uses the GType system. The semantics
3314  *              are similar to a C++ auto pointer, with the exception that
3315  *              C doesn't have automatic closure (calling destructors) when
3316  *              exiting a block scope.
3317  *              Use the \ref G_TYPE_AUTO_POINTER macro instead of calling this
3318  *              function directly.
3319  *
3320  *\return       GType A GType type.
3321  */
3322 GType g_auto_pointer_register(void)
3323 {
3324         static GType auto_pointer_type;
3325         if (!auto_pointer_type)
3326                 auto_pointer_type =
3327                         g_boxed_type_register_static
3328                                 ("G_TYPE_AUTO_POINTER",
3329                                  (GBoxedCopyFunc) g_auto_pointer_copy,
3330                                  (GBoxedFreeFunc) g_auto_pointer_free);
3331         return auto_pointer_type;
3332 }
3333
3334 /*!
3335  *\brief        Structure with g_new() allocated pointer guarded by the
3336  *              auto pointer
3337  */
3338 typedef struct AutoPointerRef {
3339         void          (*free) (gpointer);
3340         gpointer        pointer;
3341         glong           cnt;
3342 } AutoPointerRef;
3343
3344 /*!
3345  *\brief        The auto pointer opaque structure that references the
3346  *              pointer guard block.
3347  */
3348 typedef struct AutoPointer {
3349         AutoPointerRef *ref;
3350         gpointer        ptr; /*!< access to protected pointer */
3351 } AutoPointer;
3352
3353 /*!
3354  *\brief        Creates an auto pointer for a g_new()ed pointer. Example:
3355  *
3356  *\code
3357  *
3358  *              ... tell gtk_list_store it should use a G_TYPE_AUTO_POINTER
3359  *              ... when assigning, copying and freeing storage elements
3360  *
3361  *              gtk_list_store_new(N_S_COLUMNS,
3362  *                                 G_TYPE_AUTO_POINTER,
3363  *                                 -1);
3364  *
3365  *
3366  *              Template *precious_data = g_new0(Template, 1);
3367  *              g_pointer protect = g_auto_pointer_new(precious_data);
3368  *
3369  *              gtk_list_store_set(container, &iter,
3370  *                                 S_DATA, protect,
3371  *                                 -1);
3372  *
3373  *              ... the gtk_list_store has copied the pointer and
3374  *              ... incremented its reference count, we should free
3375  *              ... the auto pointer (in C++ a destructor would do
3376  *              ... this for us when leaving block scope)
3377  *
3378  *              g_auto_pointer_free(protect);
3379  *
3380  *              ... gtk_list_store_set() now manages the data. When
3381  *              ... *explicitly* requesting a pointer from the list
3382  *              ... store, don't forget you get a copy that should be
3383  *              ... freed with g_auto_pointer_free() eventually.
3384  *
3385  *\endcode
3386  *
3387  *\param        pointer Pointer to be guarded.
3388  *
3389  *\return       GAuto * Pointer that should be used in containers with
3390  *              GType support.
3391  */
3392 GAuto *g_auto_pointer_new(gpointer p)
3393 {
3394         AutoPointerRef *ref;
3395         AutoPointer    *ptr;
3396
3397         if (p == NULL)
3398                 return NULL;
3399
3400         ref = g_new0(AutoPointerRef, 1);
3401         ptr = g_new0(AutoPointer, 1);
3402
3403         ref->pointer = p;
3404         ref->free = g_free;
3405         ref->cnt = 1;
3406
3407         ptr->ref = ref;
3408         ptr->ptr = p;
3409
3410 #ifdef REF_DEBUG
3411         G_PRINT_REF ("XXXX ALLOC(%lx)\n", p);
3412 #endif
3413         return ptr;
3414 }
3415
3416 /*!
3417  *\brief        Allocate an autopointer using the passed \a free function to
3418  *              free the guarded pointer
3419  */
3420 GAuto *g_auto_pointer_new_with_free(gpointer p, GFreeFunc free_)
3421 {
3422         AutoPointer *aptr;
3423
3424         if (p == NULL)
3425                 return NULL;
3426
3427         aptr = g_auto_pointer_new(p);
3428         aptr->ref->free = free_;
3429         return aptr;
3430 }
3431
3432 gpointer g_auto_pointer_get_ptr(GAuto *auto_ptr)
3433 {
3434         if (auto_ptr == NULL)
3435                 return NULL;
3436         return ((AutoPointer *) auto_ptr)->ptr;
3437 }
3438
3439 /*!
3440  *\brief        Copies an auto pointer by. It's mostly not necessary
3441  *              to call this function directly, unless you copy/assign
3442  *              the guarded pointer.
3443  *
3444  *\param        auto_ptr Auto pointer returned by previous call to
3445  *              g_auto_pointer_new_XXX()
3446  *
3447  *\return       gpointer An auto pointer
3448  */
3449 GAuto *g_auto_pointer_copy(GAuto *auto_ptr)
3450 {
3451         AutoPointer     *ptr;
3452         AutoPointerRef  *ref;
3453         AutoPointer     *newp;
3454
3455         if (auto_ptr == NULL)
3456                 return NULL;
3457
3458         ptr = auto_ptr;
3459         ref = ptr->ref;
3460         newp = g_new0(AutoPointer, 1);
3461
3462         newp->ref = ref;
3463         newp->ptr = ref->pointer;
3464         ++(ref->cnt);
3465
3466 #ifdef REF_DEBUG
3467         G_PRINT_REF ("XXXX COPY(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3468 #endif
3469         return newp;
3470 }
3471
3472 /*!
3473  *\brief        Free an auto pointer
3474  */
3475 void g_auto_pointer_free(GAuto *auto_ptr)
3476 {
3477         AutoPointer     *ptr;
3478         AutoPointerRef  *ref;
3479
3480         if (auto_ptr == NULL)
3481                 return;
3482
3483         ptr = auto_ptr;
3484         ref = ptr->ref;
3485
3486         if (--(ref->cnt) == 0) {
3487 #ifdef REF_DEBUG
3488                 G_PRINT_REF ("XXXX FREE(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3489 #endif
3490                 ref->free(ref->pointer);
3491                 g_free(ref);
3492         }
3493 #ifdef REF_DEBUG
3494         else
3495                 G_PRINT_REF ("XXXX DEREF(%lx) -- REF (%d)\n", ref->pointer, ref->cnt);
3496 #endif
3497         g_free(ptr);
3498 }
3499
3500 /* get_uri_part() - retrieves a URI starting from scanpos.
3501                     Returns TRUE if successful */
3502 gboolean get_uri_part(const gchar *start, const gchar *scanpos,
3503                              const gchar **bp, const gchar **ep, gboolean hdr)
3504 {
3505         const gchar *ep_;
3506         gint parenthese_cnt = 0;
3507
3508         cm_return_val_if_fail(start != NULL, FALSE);
3509         cm_return_val_if_fail(scanpos != NULL, FALSE);
3510         cm_return_val_if_fail(bp != NULL, FALSE);
3511         cm_return_val_if_fail(ep != NULL, FALSE);
3512
3513         *bp = scanpos;
3514
3515         /* find end point of URI */
3516         for (ep_ = scanpos; *ep_ != '\0'; ep_ = g_utf8_next_char(ep_)) {
3517                 gunichar u = g_utf8_get_char_validated(ep_, -1);
3518                 if (!g_unichar_isgraph(u) ||
3519                     u == (gunichar)-1 ||
3520                     strchr("[]{}<>\"", *ep_)) {
3521                         break;
3522                 } else if (strchr("(", *ep_)) {
3523                         parenthese_cnt++;
3524                 } else if (strchr(")", *ep_)) {
3525                         if (parenthese_cnt > 0)
3526                                 parenthese_cnt--;
3527                         else
3528                                 break;
3529                 }
3530         }
3531
3532         /* no punctuation at end of string */
3533
3534         /* FIXME: this stripping of trailing punctuations may bite with other URIs.
3535          * should pass some URI type to this function and decide on that whether
3536          * to perform punctuation stripping */
3537
3538 #define IS_REAL_PUNCT(ch)       (g_ascii_ispunct(ch) && !strchr("/?=-_~)", ch))
3539
3540         for (; ep_ - 1 > scanpos + 1 &&
3541                IS_REAL_PUNCT(*(ep_ - 1));
3542              ep_--)
3543                 ;
3544
3545 #undef IS_REAL_PUNCT
3546
3547         *ep = ep_;
3548
3549         return TRUE;
3550 }
3551
3552 gchar *make_uri_string(const gchar *bp, const gchar *ep)
3553 {
3554         while (bp && *bp && g_ascii_isspace(*bp))
3555                 bp++;
3556         return g_strndup(bp, ep - bp);
3557 }
3558
3559 /* valid mail address characters */
3560 #define IS_RFC822_CHAR(ch) \
3561         (IS_ASCII(ch) && \
3562          (ch) > 32   && \
3563          (ch) != 127 && \
3564          !g_ascii_isspace(ch) && \
3565          !strchr("(),;<>\"", (ch)))
3566
3567 /* alphabet and number within 7bit ASCII */
3568 #define IS_ASCII_ALNUM(ch)      (IS_ASCII(ch) && g_ascii_isalnum(ch))
3569 #define IS_QUOTE(ch) ((ch) == '\'' || (ch) == '"')
3570
3571 static GHashTable *create_domain_tab(void)
3572 {
3573         gint n;
3574         GHashTable *htab = g_hash_table_new(g_stricase_hash, g_stricase_equal);
3575
3576         cm_return_val_if_fail(htab, NULL);
3577         for (n = 0; n < sizeof toplvl_domains / sizeof toplvl_domains[0]; n++)
3578                 g_hash_table_insert(htab, (gpointer) toplvl_domains[n], (gpointer) toplvl_domains[n]);
3579         return htab;
3580 }
3581
3582 static gboolean is_toplvl_domain(GHashTable *tab, const gchar *first, const gchar *last)
3583 {
3584         gchar buf[BUFFSIZE + 1];
3585         const gchar *m = buf + BUFFSIZE + 1;
3586         register gchar *p;
3587
3588         if (last - first > BUFFSIZE || first > last)
3589                 return FALSE;
3590
3591         for (p = buf; p < m &&  first < last; *p++ = *first++)
3592                 ;
3593         *p = 0;
3594
3595         return g_hash_table_lookup(tab, buf) != NULL;
3596 }
3597
3598 /* get_email_part() - retrieves an email address. Returns TRUE if successful */
3599 gboolean get_email_part(const gchar *start, const gchar *scanpos,
3600                                const gchar **bp, const gchar **ep, gboolean hdr)
3601 {
3602         /* more complex than the uri part because we need to scan back and forward starting from
3603          * the scan position. */
3604         gboolean result = FALSE;
3605         const gchar *bp_ = NULL;
3606         const gchar *ep_ = NULL;
3607         static GHashTable *dom_tab;
3608         const gchar *last_dot = NULL;
3609         const gchar *prelast_dot = NULL;
3610         const gchar *last_tld_char = NULL;
3611
3612         /* the informative part of the email address (describing the name
3613          * of the email address owner) may contain quoted parts. the
3614          * closure stack stores the last encountered quotes. */
3615         gchar closure_stack[128];
3616         gchar *ptr = closure_stack;
3617
3618         cm_return_val_if_fail(start != NULL, FALSE);
3619         cm_return_val_if_fail(scanpos != NULL, FALSE);
3620         cm_return_val_if_fail(bp != NULL, FALSE);
3621         cm_return_val_if_fail(ep != NULL, FALSE);
3622
3623         if (hdr) {
3624                 const gchar *start_quote = NULL;
3625                 const gchar *end_quote = NULL;
3626 search_again:
3627                 /* go to the real start */
3628                 if (start[0] == ',')
3629                         start++;
3630                 if (start[0] == ';')
3631                         start++;
3632                 while (start[0] == '\n' || start[0] == '\r')
3633                         start++;
3634                 while (start[0] == ' ' || start[0] == '\t')
3635                         start++;
3636
3637                 *bp = start;
3638
3639                 /* check if there are quotes (to skip , in them) */
3640                 if (*start == '"') {
3641                         start_quote = start;
3642                         start++;
3643                         end_quote = strstr(start, "\"");
3644                 } else {
3645                         start_quote = NULL;
3646                         end_quote = NULL;
3647                 }
3648
3649                 /* skip anything between quotes */
3650                 if (start_quote && end_quote) {
3651                         start = end_quote;
3652
3653                 }
3654
3655                 /* find end (either , or ; or end of line) */
3656                 if (strstr(start, ",") && strstr(start, ";"))
3657                         *ep = strstr(start,",") < strstr(start, ";")
3658                                 ? strstr(start, ",") : strstr(start, ";");
3659                 else if (strstr(start, ","))
3660                         *ep = strstr(start, ",");
3661                 else if (strstr(start, ";"))
3662                         *ep = strstr(start, ";");
3663                 else
3664                         *ep = start+strlen(start);
3665
3666                 /* go back to real start */
3667                 if (start_quote && end_quote) {
3668                         start = start_quote;
3669                 }
3670
3671                 /* check there's still an @ in that, or search
3672                  * further if possible */
3673                 if (strstr(start, "@") && strstr(start, "@") < *ep)
3674                         return TRUE;
3675                 else if (*ep < start+strlen(start)) {
3676                         start = *ep;
3677                         goto search_again;
3678                 } else if (start_quote && strstr(start, "\"") && strstr(start, "\"") < *ep) {
3679                         *bp = start_quote;
3680                         return TRUE;
3681                 } else
3682                         return FALSE;
3683         }
3684
3685         if (!dom_tab)
3686                 dom_tab = create_domain_tab();
3687         cm_return_val_if_fail(dom_tab, FALSE);
3688
3689         /* scan start of address */
3690         for (bp_ = scanpos - 1;
3691              bp_ >= start && IS_RFC822_CHAR(*(const guchar *)bp_); bp_--)
3692                 ;
3693
3694         /* TODO: should start with an alnum? */
3695         bp_++;
3696         for (; bp_ < scanpos && !IS_ASCII_ALNUM(*(const guchar *)bp_); bp_++)
3697                 ;
3698
3699         if (bp_ != scanpos) {
3700                 /* scan end of address */
3701                 for (ep_ = scanpos + 1;
3702                      *ep_ && IS_RFC822_CHAR(*(const guchar *)ep_); ep_++)
3703                         if (*ep_ == '.') {
3704                                 prelast_dot = last_dot;
3705                                 last_dot = ep_;
3706                                 if (*(last_dot + 1) == '.') {
3707                                         if (prelast_dot == NULL)
3708                                                 return FALSE;
3709                                         last_dot = prelast_dot;
3710                                         break;
3711                                 }
3712                         }
3713
3714                 /* TODO: really should terminate with an alnum? */
3715                 for (; ep_ > scanpos && !IS_ASCII_ALNUM(*(const guchar *)ep_);
3716                      --ep_)
3717                         ;
3718                 ep_++;
3719
3720                 if (last_dot == NULL)
3721                         return FALSE;
3722                 if (last_dot >= ep_)
3723                         last_dot = prelast_dot;
3724                 if (last_dot == NULL || (scanpos + 1 >= last_dot))
3725                         return FALSE;
3726                 last_dot++;
3727
3728                 for (last_tld_char = last_dot; last_tld_char < ep_; last_tld_char++)
3729                         if (*last_tld_char == '?')
3730                                 break;
3731
3732                 if (is_toplvl_domain(dom_tab, last_dot, last_tld_char))
3733                         result = TRUE;
3734
3735                 *ep = ep_;
3736                 *bp = bp_;
3737         }
3738
3739         if (!result) return FALSE;
3740
3741         if (*ep_ && bp_ != start && *(bp_ - 1) == '"' && *(ep_) == '"'
3742         && *(ep_ + 1) == ' ' && *(ep_ + 2) == '<'
3743         && IS_RFC822_CHAR(*(ep_ + 3))) {
3744                 /* this informative part with an @ in it is
3745                  * followed by the email address */
3746                 ep_ += 3;
3747
3748                 /* go to matching '>' (or next non-rfc822 char, like \n) */
3749                 for (; *ep_ != '>' && *ep_ != '\0' && IS_RFC822_CHAR(*ep_); ep_++)
3750                         ;
3751
3752                 /* include the bracket */
3753                 if (*ep_ == '>') ep_++;
3754
3755                 /* include the leading quote */
3756                 bp_--;
3757
3758                 *ep = ep_;
3759                 *bp = bp_;
3760                 return TRUE;
3761         }
3762
3763         /* skip if it's between quotes "'alfons@proteus.demon.nl'" <alfons@proteus.demon.nl> */
3764         if (bp_ - 1 > start && IS_QUOTE(*(bp_ - 1)) && IS_QUOTE(*ep_))
3765                 return FALSE;
3766
3767         /* see if this is <bracketed>; in this case we also scan for the informative part. */
3768         if (bp_ - 1 <= start || *(bp_ - 1) != '<' || *ep_ != '>')
3769                 return TRUE;
3770
3771 #define FULL_STACK()    ((size_t) (ptr - closure_stack) >= sizeof closure_stack)
3772 #define IN_STACK()      (ptr > closure_stack)
3773 /* has underrun check */
3774 #define POP_STACK()     if(IN_STACK()) --ptr
3775 /* has overrun check */
3776 #define PUSH_STACK(c)   if(!FULL_STACK()) *ptr++ = (c); else return TRUE
3777 /* has underrun check */
3778 #define PEEK_STACK()    (IN_STACK() ? *(ptr - 1) : 0)
3779
3780         ep_++;
3781
3782         /* scan for the informative part. */
3783         for (bp_ -= 2; bp_ >= start; bp_--) {
3784                 /* if closure on the stack keep scanning */
3785                 if (PEEK_STACK() == *bp_) {
3786                         POP_STACK();
3787                         continue;
3788                 }
3789                 if (!IN_STACK() && (*bp_ == '\'' || *bp_ == '"')) {
3790                         PUSH_STACK(*bp_);
3791                         continue;
3792                 }
3793
3794                 /* if nothing in the closure stack, do the special conditions
3795                  * the following if..else expression simply checks whether
3796                  * a token is acceptable. if not acceptable, the clause
3797                  * should terminate the loop with a 'break' */
3798                 if (!PEEK_STACK()) {
3799                         if (*bp_ == '-'
3800                         && (((bp_ - 1) >= start) && isalnum(*(bp_ - 1)))
3801                         && (((bp_ + 1) < ep_)    && isalnum(*(bp_ + 1)))) {
3802                                 /* hyphens are allowed, but only in
3803                                    between alnums */
3804                         } else if (strchr(" \"'", *bp_)) {
3805                                 /* but anything not being a punctiation
3806                                    is ok */
3807                         } else {
3808                                 break; /* anything else is rejected */
3809                         }
3810                 }
3811         }
3812
3813         bp_++;
3814
3815         /* scan forward (should start with an alnum) */
3816         for (; *bp_ != '<' && isspace(*bp_) && *bp_ != '"'; bp_++)
3817                 ;
3818 #undef PEEK_STACK
3819 #undef PUSH_STACK
3820 #undef POP_STACK
3821 #undef IN_STACK
3822 #undef FULL_STACK
3823
3824
3825         *bp = bp_;
3826         *ep = ep_;
3827
3828         return result;
3829 }
3830
3831 #undef IS_QUOTE
3832 #undef IS_ASCII_ALNUM
3833 #undef IS_RFC822_CHAR
3834
3835 gchar *make_email_string(const gchar *bp, const gchar *ep)
3836 {
3837         /* returns a mailto: URI; mailto: is also used to detect the
3838          * uri type later on in the button_pressed signal handler */
3839         gchar *tmp;
3840         gchar *result;
3841         gchar *colon, *at;
3842
3843         tmp = g_strndup(bp, ep - bp);
3844
3845         /* If there is a colon in the username part of the address,
3846          * we're dealing with an URI for some other protocol - do
3847          * not prefix with mailto: in such case. */
3848         colon = strchr(tmp, ':');
3849         at = strchr(tmp, '@');
3850         if (colon != NULL && at != NULL && colon < at) {
3851                 result = tmp;
3852         } else {
3853                 result = g_strconcat("mailto:", tmp, NULL);
3854                 g_free(tmp);
3855         }
3856
3857         return result;
3858 }
3859
3860 gchar *make_http_string(const gchar *bp, const gchar *ep)
3861 {
3862         /* returns an http: URI; */
3863         gchar *tmp;
3864         gchar *result;
3865
3866         while (bp && *bp && g_ascii_isspace(*bp))
3867                 bp++;
3868         tmp = g_strndup(bp, ep - bp);
3869         result = g_strconcat("http://", tmp, NULL);
3870         g_free(tmp);
3871
3872         return result;
3873 }
3874
3875 static gchar *mailcap_get_command_in_file(const gchar *path, const gchar *type, const gchar *file_to_open)
3876 {
3877         FILE *fp = claws_fopen(path, "rb");
3878         gchar buf[BUFFSIZE];
3879         gchar *result = NULL;
3880         if (!fp)
3881                 return NULL;
3882         while (claws_fgets(buf, sizeof (buf), fp) != NULL) {
3883                 gchar **parts = g_strsplit(buf, ";", 3);
3884                 gchar *trimmed = parts[0];
3885                 while (trimmed[0] == ' ' || trimmed[0] == '\t')
3886                         trimmed++;
3887                 while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
3888                         trimmed[strlen(trimmed)-1] = '\0';
3889
3890                 if (!strcmp(trimmed, type)) {
3891                         gboolean needsterminal = FALSE;
3892                         if (parts[2] && strstr(parts[2], "needsterminal")) {
3893                                 needsterminal = TRUE;
3894                         }
3895                         if (parts[2] && strstr(parts[2], "test=")) {
3896                                 gchar *orig_testcmd = g_strdup(strstr(parts[2], "test=")+5);
3897                                 gchar *testcmd = orig_testcmd;
3898                                 if (strstr(testcmd,";"))
3899                                         *(strstr(testcmd,";")) = '\0';
3900                                 while (testcmd[0] == ' ' || testcmd[0] == '\t')
3901                                         testcmd++;
3902                                 while (testcmd[strlen(testcmd)-1] == '\n')
3903                                         testcmd[strlen(testcmd)-1] = '\0';
3904                                 while (testcmd[strlen(testcmd)-1] == '\r')
3905                                         testcmd[strlen(testcmd)-1] = '\0';
3906                                 while (testcmd[strlen(testcmd)-1] == ' ' || testcmd[strlen(testcmd)-1] == '\t')
3907                                         testcmd[strlen(testcmd)-1] = '\0';
3908
3909                                 if (strstr(testcmd, "%s")) {
3910                                         gchar *tmp = g_strdup_printf(testcmd, file_to_open);
3911                                         gint res = system(tmp);
3912                                         g_free(tmp);
3913                                         g_free(orig_testcmd);
3914
3915                                         if (res != 0) {
3916                                                 g_strfreev(parts);
3917                                                 continue;
3918                                         }
3919                                 } else {
3920                                         gint res = system(testcmd);
3921                                         g_free(orig_testcmd);
3922
3923                                         if (res != 0) {
3924                                                 g_strfreev(parts);
3925                                                 continue;
3926                                         }
3927                                 }
3928                         }
3929
3930                         trimmed = parts[1];
3931                         while (trimmed[0] == ' ' || trimmed[0] == '\t')
3932                                 trimmed++;
3933                         while (trimmed[strlen(trimmed)-1] == '\n')
3934                                 trimmed[strlen(trimmed)-1] = '\0';
3935                         while (trimmed[strlen(trimmed)-1] == '\r')
3936                                 trimmed[strlen(trimmed)-1] = '\0';
3937                         while (trimmed[strlen(trimmed)-1] == ' ' || trimmed[strlen(trimmed)-1] == '\t')
3938                                 trimmed[strlen(trimmed)-1] = '\0';
3939                         result = g_strdup(trimmed);
3940                         g_strfreev(parts);
3941                         claws_fclose(fp);
3942                         if (needsterminal) {
3943                                 gchar *tmp = g_strdup_printf("xterm -e %s", result);
3944                                 g_free(result);
3945                                 result = tmp;
3946                         }
3947                         return result;
3948                 }
3949                 g_strfreev(parts);
3950         }
3951         claws_fclose(fp);
3952         return NULL;
3953 }
3954 gchar *mailcap_get_command_for_type(const gchar *type, const gchar *file_to_open)
3955 {
3956         gchar *result = NULL;
3957         gchar *path = NULL;
3958         if (type == NULL)
3959                 return NULL;
3960         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
3961         result = mailcap_get_command_in_file(path, type, file_to_open);
3962         g_free(path);
3963         if (result)
3964                 return result;
3965         result = mailcap_get_command_in_file("/etc/mailcap", type, file_to_open);
3966         return result;
3967 }
3968
3969 void mailcap_update_default(const gchar *type, const gchar *command)
3970 {
3971         gchar *path = NULL, *outpath = NULL;
3972         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap", NULL);
3973         outpath = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S, ".mailcap.new", NULL);
3974         FILE *fp = claws_fopen(path, "rb");
3975         FILE *outfp = NULL;
3976         gchar buf[BUFFSIZE];
3977         gboolean err = FALSE;
3978
3979         if (!fp) {
3980                 fp = claws_fopen(path, "a");
3981                 if (!fp) {
3982                         g_warning("failed to create file %s", path);
3983                         g_free(path);
3984                         g_free(outpath);
3985                         return;
3986                 }
3987                 fp = g_freopen(path, "rb", fp);
3988                 if (!fp) {
3989                         g_warning("failed to reopen file %s", path);
3990                         g_free(path);
3991                         g_free(outpath);
3992                         return;
3993                 }
3994         }
3995
3996         outfp = claws_fopen(outpath, "wb");
3997         if (!outfp) {
3998                 g_warning("failed to create file %s", outpath);
3999                 g_free(path);
4000                 g_free(outpath);
4001                 claws_fclose(fp);
4002                 return;
4003         }
4004         while (fp && claws_fgets(buf, sizeof (buf), fp) != NULL) {
4005                 gchar **parts = g_strsplit(buf, ";", 3);
4006                 gchar *trimmed = parts[0];
4007                 while (trimmed[0] == ' ')
4008                         trimmed++;
4009                 while (trimmed[strlen(trimmed)-1] == ' ')
4010                         trimmed[strlen(trimmed)-1] = '\0';
4011
4012                 if (!strcmp(trimmed, type)) {
4013                         g_strfreev(parts);
4014                         continue;
4015                 }
4016                 else {
4017                         if(claws_fputs(buf, outfp) == EOF) {
4018                                 err = TRUE;
4019                                 g_strfreev(parts);
4020                                 break;
4021                         }
4022                 }
4023                 g_strfreev(parts);
4024         }
4025         if (fprintf(outfp, "%s; %s\n", type, command) < 0)
4026                 err = TRUE;
4027
4028         if (fp)
4029                 claws_fclose(fp);
4030
4031         if (claws_safe_fclose(outfp) == EOF)
4032                 err = TRUE;
4033
4034         if (!err)
4035                 g_rename(outpath, path);
4036
4037         g_free(path);
4038         g_free(outpath);
4039 }
4040
4041 /* crude test to see if a file is an email. */
4042 gboolean file_is_email (const gchar *filename)
4043 {
4044         FILE *fp = NULL;
4045         gchar buffer[2048];
4046         gint score = 0;
4047         if (filename == NULL)
4048                 return FALSE;
4049         if ((fp = claws_fopen(filename, "rb")) == NULL)
4050                 return FALSE;
4051         while (score < 3
4052                && claws_fgets(buffer, sizeof (buffer), fp) != NULL) {
4053                 if (!strncmp(buffer, "From:", strlen("From:")))
4054                         score++;
4055                 else if (!strncmp(buffer, "Date:", strlen("Date:")))
4056                         score++;
4057                 else if (!strncmp(buffer, "Message-ID:", strlen("Message-ID:")))
4058                         score++;
4059                 else if (!strncmp(buffer, "Subject:", strlen("Subject:")))
4060                         score++;
4061                 else if (!strcmp(buffer, "\r\n")) {
4062                         debug_print("End of headers\n");
4063                         break;
4064                 }
4065         }
4066         claws_fclose(fp);
4067         return (score >= 3);
4068 }
4069
4070 gboolean sc_g_list_bigger(GList *list, gint max)
4071 {
4072         GList *cur = list;
4073         int i = 0;
4074         while (cur && i <= max+1) {
4075                 i++;
4076                 cur = cur->next;
4077         }
4078         return (i > max);
4079 }
4080
4081 gboolean sc_g_slist_bigger(GSList *list, gint max)
4082 {
4083         GSList *cur = list;
4084         int i = 0;
4085         while (cur && i <= max+1) {
4086                 i++;
4087                 cur = cur->next;
4088         }
4089         return (i > max);
4090 }
4091
4092 const gchar *daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4093 const gchar *monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4094                              NULL, NULL, NULL, NULL, NULL, NULL};
4095 const gchar *s_daynames[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL};
4096 const gchar *s_monthnames[] = {NULL, NULL, NULL, NULL, NULL, NULL,
4097                              NULL, NULL, NULL, NULL, NULL, NULL};
4098
4099 gint daynames_len[] =     {0,0,0,0,0,0,0};
4100 gint monthnames_len[] =   {0,0,0,0,0,0,
4101                                  0,0,0,0,0,0};
4102 gint s_daynames_len[] =   {0,0,0,0,0,0,0};
4103 gint s_monthnames_len[] = {0,0,0,0,0,0,
4104                                  0,0,0,0,0,0};
4105 const gchar *s_am_up = NULL;
4106 const gchar *s_pm_up = NULL;
4107 const gchar *s_am_low = NULL;
4108 const gchar *s_pm_low = NULL;
4109
4110 gint s_am_up_len = 0;
4111 gint s_pm_up_len = 0;
4112 gint s_am_low_len = 0;
4113 gint s_pm_low_len = 0;
4114
4115 static gboolean time_names_init_done = FALSE;
4116
4117 static void init_time_names(void)
4118 {
4119         int i = 0;
4120
4121         daynames[0] = C_("Complete day name for use by strftime", "Sunday");
4122         daynames[1] = C_("Complete day name for use by strftime", "Monday");
4123         daynames[2] = C_("Complete day name for use by strftime", "Tuesday");
4124         daynames[3] = C_("Complete day name for use by strftime", "Wednesday");
4125         daynames[4] = C_("Complete day name for use by strftime", "Thursday");
4126         daynames[5] = C_("Complete day name for use by strftime", "Friday");
4127         daynames[6] = C_("Complete day name for use by strftime", "Saturday");
4128
4129         monthnames[0] = C_("Complete month name for use by strftime", "January");
4130         monthnames[1] = C_("Complete month name for use by strftime", "February");
4131         monthnames[2] = C_("Complete month name for use by strftime", "March");
4132         monthnames[3] = C_("Complete month name for use by strftime", "April");
4133         monthnames[4] = C_("Complete month name for use by strftime", "May");
4134         monthnames[5] = C_("Complete month name for use by strftime", "June");
4135         monthnames[6] = C_("Complete month name for use by strftime", "July");
4136         monthnames[7] = C_("Complete month name for use by strftime", "August");
4137         monthnames[8] = C_("Complete month name for use by strftime", "September");
4138         monthnames[9] = C_("Complete month name for use by strftime", "October");
4139         monthnames[10] = C_("Complete month name for use by strftime", "November");
4140         monthnames[11] = C_("Complete month name for use by strftime", "December");
4141
4142         s_daynames[0] = C_("Abbr. day name for use by strftime", "Sun");
4143         s_daynames[1] = C_("Abbr. day name for use by strftime", "Mon");
4144         s_daynames[2] = C_("Abbr. day name for use by strftime", "Tue");
4145         s_daynames[3] = C_("Abbr. day name for use by strftime", "Wed");
4146         s_daynames[4] = C_("Abbr. day name for use by strftime", "Thu");
4147         s_daynames[5] = C_("Abbr. day name for use by strftime", "Fri");
4148         s_daynames[6] = C_("Abbr. day name for use by strftime", "Sat");
4149
4150         s_monthnames[0] = C_("Abbr. month name for use by strftime", "Jan");
4151         s_monthnames[1] = C_("Abbr. month name for use by strftime", "Feb");
4152         s_monthnames[2] = C_("Abbr. month name for use by strftime", "Mar");
4153         s_monthnames[3] = C_("Abbr. month name for use by strftime", "Apr");
4154         s_monthnames[4] = C_("Abbr. month name for use by strftime", "May");
4155         s_monthnames[5] = C_("Abbr. month name for use by strftime", "Jun");
4156         s_monthnames[6] = C_("Abbr. month name for use by strftime", "Jul");
4157         s_monthnames[7] = C_("Abbr. month name for use by strftime", "Aug");
4158         s_monthnames[8] = C_("Abbr. month name for use by strftime", "Sep");
4159         s_monthnames[9] = C_("Abbr. month name for use by strftime", "Oct");
4160         s_monthnames[10] = C_("Abbr. month name for use by strftime", "Nov");
4161         s_monthnames[11] = C_("Abbr. month name for use by strftime", "Dec");
4162
4163         for (i = 0; i < 7; i++) {
4164                 daynames_len[i] = strlen(daynames[i]);
4165                 s_daynames_len[i] = strlen(s_daynames[i]);
4166         }
4167         for (i = 0; i < 12; i++) {
4168                 monthnames_len[i] = strlen(monthnames[i]);
4169                 s_monthnames_len[i] = strlen(s_monthnames[i]);
4170         }
4171
4172         s_am_up = C_("For use by strftime (morning)", "AM");
4173         s_pm_up = C_("For use by strftime (afternoon)", "PM");
4174         s_am_low = C_("For use by strftime (morning, lowercase)", "am");
4175         s_pm_low = C_("For use by strftime (afternoon, lowercase)", "pm");
4176
4177         s_am_up_len = strlen(s_am_up);
4178         s_pm_up_len = strlen(s_pm_up);
4179         s_am_low_len = strlen(s_am_low);
4180         s_pm_low_len = strlen(s_pm_low);
4181
4182         time_names_init_done = TRUE;
4183 }
4184
4185 #define CHECK_SIZE() {                  \
4186         total_done += len;              \
4187         if (total_done >= buflen) {     \
4188                 buf[buflen-1] = '\0';   \
4189                 return 0;               \
4190         }                               \
4191 }
4192
4193 size_t fast_strftime(gchar *buf, gint buflen, const gchar *format, struct tm *lt)
4194 {
4195         gchar *curpos = buf;
4196         gint total_done = 0;
4197         gchar subbuf[64], subfmt[64];
4198         static time_t last_tzset = (time_t)0;
4199
4200         if (!time_names_init_done)
4201                 init_time_names();
4202
4203         if (format == NULL || lt == NULL)
4204                 return 0;
4205
4206         if (last_tzset != time(NULL)) {
4207                 tzset();
4208                 last_tzset = time(NULL);
4209         }
4210         while(*format) {
4211                 if (*format == '%') {
4212                         gint len = 0, tmp = 0;
4213                         format++;
4214                         switch(*format) {
4215                         case '%':
4216                                 len = 1; CHECK_SIZE();
4217                                 *curpos = '%';
4218                                 break;
4219                         case 'a':
4220                                 len = s_daynames_len[lt->tm_wday]; CHECK_SIZE();
4221                                 strncpy2(curpos, s_daynames[lt->tm_wday], buflen - total_done);
4222                                 break;
4223                         case 'A':
4224                                 len = daynames_len[lt->tm_wday]; CHECK_SIZE();
4225                                 strncpy2(curpos, daynames[lt->tm_wday], buflen - total_done);
4226                                 break;
4227                         case 'b':
4228                         case 'h':
4229                                 len = s_monthnames_len[lt->tm_mon]; CHECK_SIZE();
4230                                 strncpy2(curpos, s_monthnames[lt->tm_mon], buflen - total_done);
4231                                 break;
4232                         case 'B':
4233                                 len = monthnames_len[lt->tm_mon]; CHECK_SIZE();
4234                                 strncpy2(curpos, monthnames[lt->tm_mon], buflen - total_done);
4235                                 break;
4236                         case 'c':
4237                                 strftime(subbuf, 64, "%c", lt);
4238                                 len = strlen(subbuf); CHECK_SIZE();
4239                                 strncpy2(curpos, subbuf, buflen - total_done);
4240                                 break;
4241                         case 'C':
4242                                 total_done += 2; CHECK_SIZE();
4243                                 tmp = (lt->tm_year + 1900)/100;
4244                                 *curpos++ = '0'+(tmp / 10);
4245                                 *curpos++ = '0'+(tmp % 10);
4246                                 break;
4247                         case 'd':
4248                                 total_done += 2; CHECK_SIZE();
4249                                 *curpos++ = '0'+(lt->tm_mday / 10);
4250                                 *curpos++ = '0'+(lt->tm_mday % 10);
4251                                 break;
4252                         case 'D':
4253                                 total_done += 8; CHECK_SIZE();
4254                                 *curpos++ = '0'+((lt->tm_mon+1) / 10);
4255                                 *curpos++ = '0'+((lt->tm_mon+1) % 10);
4256                                 *curpos++ = '/';
4257                                 *curpos++ = '0'+(lt->tm_mday / 10);
4258                                 *curpos++ = '0'+(lt->tm_mday % 10);
4259                                 *curpos++ = '/';
4260                                 tmp = lt->tm_year%100;
4261                                 *curpos++ = '0'+(tmp / 10);
4262                                 *curpos++ = '0'+(tmp % 10);
4263                                 break;
4264                         case 'e':
4265                                 len = 2; CHECK_SIZE();
4266                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_mday);
4267                                 break;
4268                         case 'F':
4269                                 len = 10; CHECK_SIZE();
4270                                 snprintf(curpos, buflen - total_done, "%4d-%02d-%02d",
4271                                         lt->tm_year + 1900, lt->tm_mon +1, lt->tm_mday);
4272                                 break;
4273                         case 'H':
4274                                 total_done += 2; CHECK_SIZE();
4275                                 *curpos++ = '0'+(lt->tm_hour / 10);
4276                                 *curpos++ = '0'+(lt->tm_hour % 10);
4277                                 break;
4278                         case 'I':
4279                                 total_done += 2; CHECK_SIZE();
4280                                 tmp = lt->tm_hour;
4281                                 if (tmp > 12)
4282                                         tmp -= 12;
4283                                 else if (tmp == 0)
4284                                         tmp = 12;
4285                                 *curpos++ = '0'+(tmp / 10);
4286                                 *curpos++ = '0'+(tmp % 10);
4287                                 break;
4288                         case 'j':
4289                                 len = 3; CHECK_SIZE();
4290                                 snprintf(curpos, buflen - total_done, "%03d", lt->tm_yday+1);
4291                                 break;
4292                         case 'k':
4293                                 len = 2; CHECK_SIZE();
4294                                 snprintf(curpos, buflen - total_done, "%2d", lt->tm_hour);
4295                                 break;
4296                         case 'l':
4297                                 len = 2; CHECK_SIZE();
4298                                 tmp = lt->tm_hour;
4299                                 if (tmp > 12)
4300                                         tmp -= 12;
4301                                 else if (tmp == 0)
4302                                         tmp = 12;
4303                                 snprintf(curpos, buflen - total_done, "%2d", tmp);
4304                                 break;
4305                         case 'm':
4306                                 total_done += 2; CHECK_SIZE();
4307                                 tmp = lt->tm_mon + 1;
4308                                 *curpos++ = '0'+(tmp / 10);
4309                                 *curpos++ = '0'+(tmp % 10);
4310                                 break;
4311                         case 'M':
4312                                 total_done += 2; CHECK_SIZE();
4313                                 *curpos++ = '0'+(lt->tm_min / 10);
4314                                 *curpos++ = '0'+(lt->tm_min % 10);
4315                                 break;
4316                         case 'n':
4317                                 len = 1; CHECK_SIZE();
4318                                 *curpos = '\n';
4319                                 break;
4320                         case 'p':
4321                                 if (lt->tm_hour >= 12) {
4322                                         len = s_pm_up_len; CHECK_SIZE();
4323                                         snprintf(curpos, buflen-total_done, "%s", s_pm_up);
4324                                 } else {
4325                                         len = s_am_up_len; CHECK_SIZE();
4326                                         snprintf(curpos, buflen-total_done, "%s", s_am_up);
4327                                 }
4328                                 break;
4329                         case 'P':
4330                                 if (lt->tm_hour >= 12) {
4331                                         len = s_pm_low_len; CHECK_SIZE();
4332                                         snprintf(curpos, buflen-total_done, "%s", s_pm_low);
4333                                 } else {
4334                                         len = s_am_low_len; CHECK_SIZE();
4335                                         snprintf(curpos, buflen-total_done, "%s", s_am_low);
4336                                 }
4337                                 break;
4338                         case 'r':
4339 #ifdef G_OS_WIN32
4340                                 strftime(subbuf, 64, "%I:%M:%S %p", lt);
4341 #else
4342                                 strftime(subbuf, 64, "%r", lt);
4343 #endif
4344                                 len = strlen(subbuf); CHECK_SIZE();
4345                                 strncpy2(curpos, subbuf, buflen - total_done);
4346                                 break;
4347                         case 'R':
4348                                 total_done += 5; CHECK_SIZE();
4349                                 *curpos++ = '0'+(lt->tm_hour / 10);
4350                                 *curpos++ = '0'+(lt->tm_hour % 10);
4351                                 *curpos++ = ':';
4352                                 *curpos++ = '0'+(lt->tm_min / 10);
4353                                 *curpos++ = '0'+(lt->tm_min % 10);
4354                                 break;
4355                         case 's':
4356                                 snprintf(subbuf, 64, "%" CM_TIME_FORMAT, mktime(lt));
4357                                 len = strlen(subbuf); CHECK_SIZE();
4358                                 strncpy2(curpos, subbuf, buflen - total_done);
4359                                 break;
4360                         case 'S':
4361                                 total_done += 2; CHECK_SIZE();
4362                                 *curpos++ = '0'+(lt->tm_sec / 10);
4363                                 *curpos++ = '0'+(lt->tm_sec % 10);
4364                                 break;
4365                         case 't':
4366                                 len = 1; CHECK_SIZE();
4367                                 *curpos = '\t';
4368                                 break;
4369                         case 'T':
4370                                 total_done += 8; CHECK_SIZE();
4371                                 *curpos++ = '0'+(lt->tm_hour / 10);
4372                                 *curpos++ = '0'+(lt->tm_hour % 10);
4373                                 *curpos++ = ':';
4374                                 *curpos++ = '0'+(lt->tm_min / 10);
4375                                 *curpos++ = '0'+(lt->tm_min % 10);
4376                                 *curpos++ = ':';
4377                                 *curpos++ = '0'+(lt->tm_sec / 10);
4378                                 *curpos++ = '0'+(lt->tm_sec % 10);
4379                                 break;
4380                         case 'u':
4381                                 len = 1; CHECK_SIZE();
4382                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday == 0 ? 7: lt->tm_wday);
4383                                 break;
4384                         case 'w':
4385                                 len = 1; CHECK_SIZE();
4386                                 snprintf(curpos, buflen - total_done, "%d", lt->tm_wday);
4387                                 break;
4388                         case 'x':
4389                                 strftime(subbuf, 64, "%x", lt);
4390                                 len = strlen(subbuf); CHECK_SIZE();
4391                                 strncpy2(curpos, subbuf, buflen - total_done);
4392                                 break;
4393                         case 'X':
4394                                 strftime(subbuf, 64, "%X", lt);
4395                                 len = strlen(subbuf); CHECK_SIZE();
4396                                 strncpy2(curpos, subbuf, buflen - total_done);
4397                                 break;
4398                         case 'y':
4399                                 total_done += 2; CHECK_SIZE();
4400                                 tmp = lt->tm_year%100;
4401                                 *curpos++ = '0'+(tmp / 10);
4402                                 *curpos++ = '0'+(tmp % 10);
4403                                 break;
4404                         case 'Y':
4405                                 len = 4; CHECK_SIZE();
4406                                 snprintf(curpos, buflen - total_done, "%4d", lt->tm_year + 1900);
4407                                 break;
4408                         case 'G':
4409                         case 'g':
4410                         case 'U':
4411                         case 'V':
4412                         case 'W':
4413                         case 'z':
4414                         case 'Z':
4415                         case '+':
4416                                 /* let these complicated ones be done with the libc */
4417                                 snprintf(subfmt, 64, "%%%c", *format);
4418                                 strftime(subbuf, 64, subfmt, lt);
4419                                 len = strlen(subbuf); CHECK_SIZE();
4420                                 strncpy2(curpos, subbuf, buflen - total_done);
4421                                 break;
4422                         case 'E':
4423                         case 'O':
4424                                 /* let these complicated modifiers be done with the libc */
4425                                 snprintf(subfmt, 64, "%%%c%c", *format, *(format+1));
4426                                 strftime(subbuf, 64, subfmt, lt);
4427                                 len = strlen(subbuf); CHECK_SIZE();
4428                                 strncpy2(curpos, subbuf, buflen - total_done);
4429                                 format++;
4430                                 break;
4431                         default:
4432                                 g_warning("format error (%c)", *format);
4433                                 *curpos = '\0';
4434                                 return total_done;
4435                         }
4436                         curpos += len;
4437                         format++;
4438                 } else {
4439                         int len = 1; CHECK_SIZE();
4440                         *curpos++ = *format++;
4441                 }
4442         }
4443         *curpos = '\0';
4444         return total_done;
4445 }
4446
4447 #ifdef G_OS_WIN32
4448 #define WEXITSTATUS(x) (x)
4449 #endif
4450
4451 static gchar *canonical_list_to_file(GSList *list)
4452 {
4453         GString *result = g_string_new(NULL);
4454         GSList *pathlist = g_slist_reverse(g_slist_copy(list));
4455         GSList *cur;
4456         gchar *str;
4457
4458 #ifndef G_OS_WIN32
4459         result = g_string_append(result, G_DIR_SEPARATOR_S);
4460 #else
4461         if (pathlist->data) {
4462                 const gchar *root = (gchar *)pathlist->data;
4463                 if (root[0] != '\0' && g_ascii_isalpha(root[0]) &&
4464                     root[1] == ':') {
4465                         /* drive - don't prepend dir separator */
4466                 } else {
4467                         result = g_string_append(result, G_DIR_SEPARATOR_S);
4468                 }
4469         }
4470 #endif
4471
4472         for (cur = pathlist; cur; cur = cur->next) {
4473                 result = g_string_append(result, (gchar *)cur->data);
4474                 if (cur->next)
4475                         result = g_string_append(result, G_DIR_SEPARATOR_S);
4476         }
4477         g_slist_free(pathlist);
4478
4479         str = result->str;
4480         g_string_free(result, FALSE);
4481
4482         return str;
4483 }
4484
4485 static GSList *cm_split_path(const gchar *filename, int depth)
4486 {
4487         gchar **path_parts;
4488         GSList *canonical_parts = NULL;
4489         GStatBuf st;
4490         int i;
4491 #ifndef G_OS_WIN32
4492         gboolean follow_symlinks = TRUE;
4493 #endif
4494
4495         if (depth > 32) {
4496 #ifndef G_OS_WIN32
4497                 errno = ELOOP;
4498 #else
4499                 errno = EINVAL; /* can't happen, no symlink handling */
4500 #endif
4501                 return NULL;
4502         }
4503
4504         if (!g_path_is_absolute(filename)) {
4505                 errno =EINVAL;
4506                 return NULL;
4507         }
4508
4509         path_parts = g_strsplit(filename, G_DIR_SEPARATOR_S, -1);
4510
4511         for (i = 0; path_parts[i] != NULL; i++) {
4512                 if (!strcmp(path_parts[i], ""))
4513                         continue;
4514                 if (!strcmp(path_parts[i], "."))
4515                         continue;
4516                 else if (!strcmp(path_parts[i], "..")) {
4517                         if (i == 0) {
4518                                 errno =ENOTDIR;
4519                                 g_strfreev(path_parts);
4520                                 return NULL;
4521                         }
4522                         else /* Remove the last inserted element */
4523                                 canonical_parts =
4524                                         g_slist_delete_link(canonical_parts,
4525                                                             canonical_parts);
4526                 } else {
4527                         gchar *tmp_path;
4528
4529                         canonical_parts = g_slist_prepend(canonical_parts,
4530                                                 g_strdup(path_parts[i]));
4531
4532                         tmp_path = canonical_list_to_file(canonical_parts);
4533
4534                         if(g_stat(tmp_path, &st) < 0) {
4535                                 if (errno == ENOENT) {
4536                                         errno = 0;
4537 #ifndef G_OS_WIN32
4538                                         follow_symlinks = FALSE;
4539 #endif
4540                                 }
4541                                 if (errno != 0) {
4542                                         g_free(tmp_path);
4543                                         slist_free_strings_full(canonical_parts);
4544                                         g_strfreev(path_parts);
4545
4546                                         return NULL;
4547                                 }
4548                         }
4549 #ifndef G_OS_WIN32
4550                         if (follow_symlinks && g_file_test(tmp_path, G_FILE_TEST_IS_SYMLINK)) {
4551                                 GError *error = NULL;
4552                                 gchar *target = g_file_read_link(tmp_path, &error);
4553
4554                                 if (!g_path_is_absolute(target)) {
4555                                         /* remove the last inserted element */
4556                                         canonical_parts =
4557                                                 g_slist_delete_link(canonical_parts,
4558                                                             canonical_parts);
4559                                         /* add the target */
4560                                         canonical_parts = g_slist_prepend(canonical_parts,
4561                                                 g_strdup(target));
4562                                         g_free(target);
4563
4564                                         /* and get the new target */
4565                                         target = canonical_list_to_file(canonical_parts);
4566                                 }
4567
4568                                 /* restart from absolute target */
4569                                 slist_free_strings_full(canonical_parts);
4570                                 canonical_parts = NULL;
4571                                 if (!error)
4572                                         canonical_parts = cm_split_path(target, depth + 1);
4573                                 else
4574                                         g_error_free(error);
4575                                 if (canonical_parts == NULL) {
4576                                         g_free(tmp_path);
4577                                         g_strfreev(path_parts);
4578                                         return NULL;
4579                                 }
4580                                 g_free(target);
4581                         }
4582 #endif
4583                         g_free(tmp_path);
4584                 }
4585         }
4586         g_strfreev(path_parts);
4587         return canonical_parts;
4588 }
4589
4590 /*
4591  * Canonicalize a filename, resolving symlinks along the way.
4592  * Returns a negative errno in case of error.
4593  */
4594 int cm_canonicalize_filename(const gchar *filename, gchar **canonical_name) {
4595         GSList *canonical_parts;
4596         gboolean is_absolute;
4597
4598         if (filename == NULL)
4599                 return -EINVAL;
4600         if (canonical_name == NULL)
4601                 return -EINVAL;
4602         *canonical_name = NULL;
4603
4604         is_absolute = g_path_is_absolute(filename);
4605         if (!is_absolute) {
4606                 /* Always work on absolute filenames. */
4607                 gchar *cur = g_get_current_dir();
4608                 gchar *absolute_filename = g_strconcat(cur, G_DIR_SEPARATOR_S,
4609                                                        filename, NULL);
4610
4611                 canonical_parts = cm_split_path(absolute_filename, 0);
4612                 g_free(absolute_filename);
4613                 g_free(cur);
4614         } else
4615                 canonical_parts = cm_split_path(filename, 0);
4616
4617         if (canonical_parts == NULL)
4618                 return -errno;
4619
4620         *canonical_name = canonical_list_to_file(canonical_parts);
4621         slist_free_strings_full(canonical_parts);
4622         return 0;
4623 }
4624
4625 /* Returns a decoded base64 string, guaranteed to be null-terminated. */
4626 guchar *g_base64_decode_zero(const gchar *text, gsize *out_len)
4627 {
4628         gchar *tmp = g_base64_decode(text, out_len);
4629         gchar *out = g_strndup(tmp, *out_len);
4630
4631         g_free(tmp);
4632
4633         if (strlen(out) != *out_len) {
4634                 g_warning("strlen(out) %"G_GSIZE_FORMAT" != *out_len %"G_GSIZE_FORMAT, strlen(out), *out_len);
4635         }
4636
4637         return out;
4638 }
4639
4640 /* Attempts to read count bytes from a PRNG into memory area starting at buf.
4641  * It is up to the caller to make sure there is at least count bytes
4642  * available at buf. */
4643 gboolean
4644 get_random_bytes(void *buf, size_t count)
4645 {
4646         /* Open our prng source. */
4647 #if defined G_OS_WIN32
4648         HCRYPTPROV rnd;
4649
4650         if (!CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, 0) &&
4651                         !CryptAcquireContext(&rnd, NULL, NULL, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
4652                 debug_print("Could not acquire a CSP handle.\n");
4653                 return FALSE;
4654         }
4655 #else
4656         int rnd;
4657         ssize_t ret;
4658
4659         rnd = open("/dev/urandom", O_RDONLY);
4660         if (rnd == -1) {
4661                 FILE_OP_ERROR("/dev/urandom", "open");
4662                 debug_print("Could not open /dev/urandom.\n");
4663                 return FALSE;
4664         }
4665 #endif
4666
4667         /* Read data from the source into buf. */
4668 #if defined G_OS_WIN32
4669         if (!CryptGenRandom(rnd, count, buf)) {
4670                 debug_print("Could not read %"G_GSIZE_FORMAT" random bytes.\n", count);
4671                 CryptReleaseContext(rnd, 0);
4672                 return FALSE;
4673         }
4674 #else
4675         ret = read(rnd, buf, count);
4676         if (ret != count) {
4677                 FILE_OP_ERROR("/dev/urandom", "read");
4678                 debug_print("Could not read enough data from /dev/urandom, read only %ld of %lu bytes.\n", ret, count);
4679                 close(rnd);
4680                 return FALSE;
4681         }
4682 #endif
4683
4684         /* Close the prng source. */
4685 #if defined G_OS_WIN32
4686         CryptReleaseContext(rnd, 0);
4687 #else
4688         close(rnd);
4689 #endif
4690
4691         return TRUE;
4692 }
4693
4694 /* returns FALSE if parsing failed, otherwise returns TRUE and sets *server, *port
4695    and eventually *fp from filename (if not NULL, they must be free'd by caller after
4696    user.
4697    filenames we expect: 'host.name.port.cert' or 'host.name.port.f:i:n:g:e:r:p:r:i:n:t.cert' */
4698 gboolean get_serverportfp_from_filename(const gchar *str, gchar **server, gchar **port, gchar **fp)
4699 {
4700         const gchar *pos, *dotport_pos = NULL, *dotcert_pos = NULL, *dotfp_pos = NULL;
4701
4702         g_return_val_if_fail(str != NULL, FALSE);
4703
4704         pos = str + strlen(str) - 1;
4705         while ((pos > str) && !dotport_pos) {
4706                 if (*pos == '.') {
4707                         if (!dotcert_pos) {
4708                                 /* match the .cert suffix */
4709                                 if (strcmp(pos, ".cert") == 0) {
4710                                         dotcert_pos = pos;
4711                                 }
4712                         } else {
4713                                 if (!dotfp_pos) {
4714                                         /* match an eventual fingerprint */
4715                                         /* or the port number */
4716                                         if (strncmp(pos + 3, ":", 1) == 0) {
4717                                                 dotfp_pos = pos;
4718                                         } else {
4719                                                 dotport_pos = pos;
4720                                         }
4721                                 } else {
4722                                         /* match the port number */
4723                                         dotport_pos = pos;
4724                                 }
4725                         }
4726                 }
4727                 pos--;
4728         }
4729         if (!dotport_pos || !dotcert_pos) {
4730                 g_warning("could not parse filename %s", str);
4731                 return FALSE;
4732         }
4733
4734         if (server != NULL)
4735                 *server = g_strndup(str, dotport_pos - str);
4736         if (dotfp_pos) {
4737                 if (port != NULL)
4738                         *port = g_strndup(dotport_pos + 1, dotfp_pos - dotport_pos - 1);
4739                 if (fp != NULL)
4740                         *fp = g_strndup(dotfp_pos + 1, dotcert_pos - dotfp_pos - 1);
4741         } else {
4742                 if (port != NULL)
4743                         *port = g_strndup(dotport_pos + 1, dotcert_pos - dotport_pos - 1);
4744                 if (fp != NULL)
4745                         *fp = NULL;
4746         }
4747
4748         debug_print("filename='%s' => server='%s' port='%s' fp='%s'\n",
4749                         str,
4750                         (server ? *server : "(n/a)"),
4751                         (port ? *port : "(n/a)"),
4752                         (fp ? *fp : "(n/a)"));
4753
4754         if (!(server && *server) || !(port && *port))
4755                 return FALSE;
4756         else
4757                 return TRUE;
4758 }
4759
4760 #ifdef G_OS_WIN32
4761 gchar *win32_debug_log_path(void)
4762 {
4763         return g_strconcat(g_get_tmp_dir(), G_DIR_SEPARATOR_S,
4764                         "claws-win32.log", NULL);
4765 }
4766 #endif