src/common/utils.h

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifndef __UTILS_H__
  21 #define __UTILS_H__
  22
  23 #ifdef HAVE_CONFIG_H
  24 #  include "config.h"
  25 #endif
  26
  27 #include <glib.h>
  28 #include <glib-object.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <sys/types.h>
  34 #include <dirent.h>
  35 #include <time.h>
  36 #if HAVE_ALLOCA_H
  37 #  include <alloca.h>
  38 #endif
  39 #if HAVE_WCHAR_H
  40 #  include <wchar.h>
  41 #endif
  42
  43 /* Wrappers for C library function that take pathname arguments. */
  44 #if GLIB_CHECK_VERSION(2, 6, 0)
  45 #  include <glib/gstdio.h>
  46 #else
  47
  48 #define g_open          open
  49 #define g_rename        rename
  50 #define g_mkdir         mkdir
  51 #define g_stat          stat
  52 #define g_lstat         lstat
  53 #define g_unlink        unlink
  54 #define g_remove        remove
  55 #define g_rmdir         rmdir
  56 #define g_fopen         fopen
  57 #define g_freopen       freopen
  58
  59 #endif /* GLIB_CHECK_VERSION */
  60
  61 #if !GLIB_CHECK_VERSION(2, 7, 0)
  62
  63 #ifdef G_OS_UNIX
  64 #define g_chdir         chdir
  65 #define g_chmod         chmod
  66 #else
  67 gint g_chdir    (const gchar    *path);
  68 gint g_chmod    (const gchar    *path,
  69                  gint            mode);
  70 #endif /* G_OS_UNIX */
  71
  72 #endif /* !GLIB_CHECK_VERSION */
  73
  74 /* The AC_CHECK_SIZEOF() in configure fails for some machines.
  75  * we provide some fallback values here */
  76 #if !SIZEOF_UNSIGNED_SHORT
  77   #undef SIZEOF_UNSIGNED_SHORT
  78   #define SIZEOF_UNSIGNED_SHORT 2
  79 #endif
  80 #if !SIZEOF_UNSIGNED_INT
  81   #undef SIZEOF_UNSIGNED_INT
  82   #define SIZEOF_UNSIGNED_INT 4
  83 #endif
  84 #if !SIZEOF_UNSIGNED_LONG
  85   #undef SIZEOF_UNSIGNED_LONG
  86   #define SIZEOF_UNSIGNED_LONG 4
  87 #endif
  88
  89 #ifndef HAVE_U32_TYPEDEF
  90   #undef u32        /* maybe there is a macro with this name */
  91   typedef guint32 u32;
  92   #define HAVE_U32_TYPEDEF
  93 #endif
  94
  95 #ifndef BIG_ENDIAN_HOST
  96   #if (G_BYTE_ORDER == G_BIG_ENDIAN)
  97     #define BIG_ENDIAN_HOST 1
  98   #endif
  99 #endif
 100
 101 #define CHDIR_RETURN_IF_FAIL(dir) \
 102 { \
 103         if (change_dir(dir) < 0) return; \
 104 }
 105
 106 #define CHDIR_RETURN_VAL_IF_FAIL(dir, val) \
 107 { \
 108         if (change_dir(dir) < 0) return val; \
 109 }
 110
 111 #define CHDIR_EXEC_CODE_RETURN_VAL_IF_FAIL(dir, val, code) \
 112 { \
 113         if (change_dir(dir) < 0) { \
 114                 code \
 115                 return val; \
 116         } \
 117 }
 118
 119 #define Xalloca(ptr, size, iffail) \
 120 { \
 121         if ((ptr = alloca(size)) == NULL) { \
 122                 g_warning("can't allocate memory\n"); \
 123                 iffail; \
 124         } \
 125 }
 126
 127 #define Xstrdup_a(ptr, str, iffail) \
 128 { \
 129         gchar *__tmp; \
 130  \
 131         if ((__tmp = alloca(strlen(str) + 1)) == NULL) { \
 132                 g_warning("can't allocate memory\n"); \
 133                 iffail; \
 134         } else \
 135                 strcpy(__tmp, str); \
 136  \
 137         ptr = __tmp; \
 138 }
 139
 140 #define Xstrndup_a(ptr, str, len, iffail) \
 141 { \
 142         gchar *__tmp; \
 143  \
 144         if ((__tmp = alloca(len + 1)) == NULL) { \
 145                 g_warning("can't allocate memory\n"); \
 146                 iffail; \
 147         } else { \
 148                 strncpy(__tmp, str, len); \
 149                 __tmp[len] = '\0'; \
 150         } \
 151  \
 152         ptr = __tmp; \
 153 }
 154
 155 #define Xstrcat_a(ptr, str1, str2, iffail) \
 156 { \
 157         gchar *__tmp; \
 158         gint len1, len2; \
 159  \
 160         len1 = strlen(str1); \
 161         len2 = strlen(str2); \
 162         if ((__tmp = alloca(len1 + len2 + 1)) == NULL) { \
 163                 g_warning("can't allocate memory\n"); \
 164                 iffail; \
 165         } else { \
 166                 memcpy(__tmp, str1, len1); \
 167                 memcpy(__tmp + len1, str2, len2 + 1); \
 168         } \
 169  \
 170         ptr = __tmp; \
 171 }
 172
 173 #define AUTORELEASE_STR(str, iffail) \
 174 { \
 175         gchar *__str; \
 176         Xstrdup_a(__str, str, iffail); \
 177         g_free(str); \
 178         str = __str; \
 179 }
 180
 181 #define FILE_OP_ERROR(file, func) \
 182 { \
 183         g_printerr("%s: ", file); \
 184         fflush(stderr); \
 185         perror(func); \
 186 }
 187
 188 #define IS_ASCII(c) (((guchar) c) <= 0177 ? 1 : 0)
 189
 190 #ifdef __cplusplus
 191 extern "C" {
 192 #endif
 193
 194 typedef gpointer (*GNodeMapFunc)        (gpointer nodedata, gpointer data);
 195
 196 /* debug functions */
 197 void debug_set_mode             (gboolean mode);
 198 gboolean debug_get_mode         (void);
 199
 200 #ifndef __CYGWIN__
 201 #define debug_print \
 202         debug_print_real("%s:%d:", debug_srcname(__FILE__), __LINE__), \
 203         debug_print_real
 204 #else
 205   /* FIXME: cygwin: why debug_srcname couldn't be resolved in library? */
 206 #define debug_print \
 207         debug_print_real("%s:%d:", __FILE__, __LINE__), \
 208         debug_print_real
 209 #endif
 210
 211 /* for macro expansion */
 212 #define Str(x)  #x
 213 #define Xstr(x) Str(x)
 214
 215
 216 /* System related stuff.  */
 217
 218 gboolean superuser_p (void);
 219
 220
 221 /* String utilities.  */
 222
 223 void list_free_strings          (GList          *list);
 224 void slist_free_strings         (GSList         *list);
 225
 226 void hash_free_strings          (GHashTable     *table);
 227
 228 gint str_case_equal             (gconstpointer   v,
 229                                  gconstpointer   v2);
 230 guint str_case_hash             (gconstpointer   key);
 231
 232 void ptr_array_free_strings     (GPtrArray      *array);
 233
 234 typedef gboolean (*StrFindFunc) (const gchar    *haystack,
 235                                  const gchar    *needle);
 236
 237 gboolean str_find               (const gchar    *haystack,
 238                                  const gchar    *needle);
 239 gboolean str_case_find          (const gchar    *haystack,
 240                                  const gchar    *needle);
 241 /* number-string conversion */
 242 gint to_number                  (const gchar *nstr);
 243 gchar *itos_buf                 (gchar       *nstr,
 244                                  gint         n);
 245 gchar *itos                     (gint         n);
 246 gchar *to_human_readable        (size_t       size);
 247
 248 /* alternative string functions */
 249 gint strcmp2            (const gchar    *s1,
 250                          const gchar    *s2);
 251 gchar *strstr2          (const gchar    *s1,
 252                          const gchar    *s2);
 253 gint path_cmp           (const gchar    *s1,
 254                          const gchar    *s2);
 255 gchar *strretchomp      (gchar          *str);
 256 gchar *strtailchomp     (gchar          *str,
 257                          gchar           tail_char);
 258 gchar *strcrchomp       (gchar          *str);
 259 gint file_strip_crs     (const gchar    *file);
 260 gchar *strcasestr       (const gchar    *haystack,
 261                          const gchar    *needle);
 262 gpointer my_memmem      (gconstpointer   haystack,
 263                          size_t          haystacklen,
 264                          gconstpointer   needle,
 265                          size_t          needlelen);
 266 gchar *strncpy2         (gchar          *dest,
 267                          const gchar    *src,
 268                          size_t          n);
 269
 270 gboolean is_next_nonascii       (const gchar *s);
 271 gint get_next_word_len          (const gchar *s);
 272
 273 /* functions for string parsing */
 274 gint subject_compare                    (const gchar    *s1,
 275                                          const gchar    *s2);
 276 gint subject_compare_for_sort           (const gchar    *s1,
 277                                          const gchar    *s2);
 278 void trim_subject                       (gchar          *str);
 279 void eliminate_parenthesis              (gchar          *str,
 280                                          gchar           op,
 281                                          gchar           cl);
 282 void extract_parenthesis                (gchar          *str,
 283                                          gchar           op,
 284                                          gchar           cl);
 285
 286 void extract_quote                      (gchar          *str,
 287                                          gchar           quote_chr);
 288 void eliminate_address_comment          (gchar          *str);
 289 gchar *strchr_with_skip_quote           (const gchar    *str,
 290                                          gint            quote_chr,
 291                                          gint            c);
 292 void extract_address                    (gchar          *str);
 293 void extract_list_id_str                (gchar          *str);
 294
 295 GSList *address_list_append             (GSList         *addr_list,
 296                                          const gchar    *str);
 297 GSList *address_list_append_with_comments(GSList        *addr_list,
 298                                          const gchar    *str);
 299 GSList *references_list_prepend         (GSList         *msgid_list,
 300                                          const gchar    *str);
 301 GSList *references_list_append          (GSList         *msgid_list,
 302                                          const gchar    *str);
 303 GSList *newsgroup_list_append           (GSList         *group_list,
 304                                          const gchar    *str);
 305
 306 GList *add_history                      (GList          *list,
 307                                          const gchar    *str);
 308
 309 void remove_return                      (gchar          *str);
 310 void remove_space                       (gchar          *str);
 311 void unfold_line                        (gchar          *str);
 312 void subst_char                         (gchar          *str,
 313                                          gchar           orig,
 314                                          gchar           subst);
 315 void subst_chars                        (gchar          *str,
 316                                          gchar          *orig,
 317                                          gchar          subst);
 318 void subst_for_filename                 (gchar          *str);
 319 void subst_for_shellsafe_filename       (gchar          *str);
 320 gboolean is_ascii_str                   (const gchar    *str);
 321 gint get_quote_level                    (const gchar    *str,
 322                                          const gchar    *quote_chars);
 323 gint check_line_length                  (const gchar    *str,
 324                                          gint            max_chars,
 325                                          gint           *line);
 326
 327 gchar **strsplit_with_quote             (const gchar    *str,
 328                                          const gchar    *delim,
 329                                          gint            max_tokens);
 330
 331 gchar *get_abbrev_newsgroup_name        (const gchar    *group,
 332                                          gint            len);
 333 gchar *trim_string                      (const gchar    *str,
 334                                          gint            len);
 335
 336 GList *uri_list_extract_filenames       (const gchar    *uri_list);
 337 gboolean is_uri_string                  (const gchar    *str);
 338 gchar *get_uri_path                     (const gchar    *uri);
 339 gint get_uri_len                        (const gchar    *str);
 340 void decode_uri                         (gchar          *decoded_uri,
 341                                          const gchar    *encoded_uri);
 342 void decode_uri_with_plus               (gchar          *decoded_uri,
 343                                          const gchar    *encoded_uri,
 344                                          gboolean        with_plus);
 345 gint scan_mailto_url                    (const gchar    *mailto,
 346                                          gchar         **from,
 347                                          gchar         **to,
 348                                          gchar         **cc,
 349                                          gchar         **bcc,
 350                                          gchar         **subject,
 351                                          gchar         **body,
 352                                          gchar         ***attach);
 353
 354 /* return static strings */
 355 const gchar *get_home_dir               (void);
 356 const gchar *get_rc_dir                 (void);
 357 void  set_rc_dir                        (const gchar *dir);
 358 gboolean rc_dir_is_alt                  (void);
 359 const gchar *get_mail_base_dir          (void);
 360 const gchar *get_news_cache_dir         (void);
 361 const gchar *get_imap_cache_dir         (void);
 362 const gchar *get_mime_tmp_dir           (void);
 363 const gchar *get_template_dir           (void);
 364 const gchar *get_plugin_dir             (void);
 365 const gchar *get_tmp_dir                (void);
 366 const gchar *get_locale_dir             (void);
 367 gchar *get_tmp_file                     (void);
 368 const gchar *get_domain_name            (void);
 369
 370 /* file / directory handling */
 371 off_t get_file_size             (const gchar    *file);
 372 off_t get_file_size_as_crlf     (const gchar    *file);
 373
 374 time_t get_file_mtime           (const gchar *file);
 375
 376 gboolean file_exist             (const gchar    *file,
 377                                  gboolean        allow_fifo);
 378 gboolean is_relative_filename   (const gchar *file);
 379 gboolean is_dir_exist           (const gchar    *dir);
 380 gboolean is_file_entry_exist    (const gchar    *file);
 381 gboolean dirent_is_regular_file (struct dirent  *d);
 382
 383 #define is_file_exist(file)             file_exist(file, FALSE)
 384 #define is_file_or_fifo_exist(file)     file_exist(file, TRUE)
 385
 386 gint change_dir                 (const gchar    *dir);
 387 gint make_dir                   (const gchar    *dir);
 388 gint make_dir_hier              (const gchar    *dir);
 389 gint remove_all_files           (const gchar    *dir);
 390 gint remove_numbered_files      (const gchar    *dir,
 391                                  guint           first,
 392                                  guint           last);
 393 gint remove_numbered_files_not_in_list(const gchar *dir,
 394                                        GSList *numberlist);
 395 gint remove_all_numbered_files  (const gchar    *dir);
 396 gint remove_dir_recursive       (const gchar    *dir);
 397 gint append_file                (const gchar    *src,
 398                                  const gchar    *dest,
 399                                  gboolean        keep_backup);
 400 gint rename_force               (const gchar    *oldpath,
 401                                  const gchar    *newpath);
 402 gint copy_file                  (const gchar    *src,
 403                                  const gchar    *dest,
 404                                  gboolean        keep_backup);
 405 gint move_file                  (const gchar    *src,
 406                                  const gchar    *dest,
 407                                  gboolean        overwrite);
 408 gint copy_dir                   (const gchar    *src,
 409                                  const gchar    *dest);
 410 gint copy_file_part_to_fp       (FILE           *fp,
 411                                  off_t           offset,
 412                                  size_t          length,
 413                                  FILE           *dest_fp);
 414 gint copy_file_part             (FILE           *fp,
 415                                  off_t           offset,
 416                                  size_t          length,
 417                                  const gchar    *dest);
 418
 419 gchar *canonicalize_str         (const gchar    *str);
 420 gint canonicalize_file          (const gchar    *src,
 421                                  const gchar    *dest);
 422 gint canonicalize_file_replace  (const gchar    *file);
 423
 424 gchar *normalize_newlines       (const gchar    *str);
 425
 426 gchar *get_outgoing_rfc2822_str (FILE           *fp);
 427
 428 gint change_file_mode_rw        (FILE           *fp,
 429                                  const gchar    *file);
 430 FILE *my_tmpfile                (void);
 431 FILE *get_tmpfile_in_dir        (const gchar    *dir,
 432                                  gchar         **filename);
 433 FILE *str_open_as_stream        (const gchar    *str);
 434 gint str_write_to_file          (const gchar    *str,
 435                                  const gchar    *file);
 436 gchar *file_read_to_str         (const gchar    *file);
 437 gchar *file_read_stream_to_str  (FILE           *fp);
 438 gchar *file_read_to_str_no_recode(const gchar *file);
 439 gchar *file_read_stream_to_str_no_recode(FILE *fp);
 440
 441 char *fgets_crlf(char *buf, int size, FILE *stream);
 442
 443 /* process execution */
 444 gint execute_command_line       (const gchar    *cmdline,
 445                                  gboolean        async);
 446 gchar *get_command_output       (const gchar    *cmdline);
 447
 448 /* open URI with external browser */
 449 gint open_uri(const gchar *uri, const gchar *cmdline);
 450 /* open file with text editor */
 451 gint open_txt_editor(const gchar *filepath, const gchar *cmdline);
 452
 453 /* time functions */
 454 time_t remote_tzoffset_sec      (const gchar    *zone);
 455 time_t tzoffset_sec             (time_t         *now);
 456 gchar *tzoffset                 (time_t         *now);
 457 void get_rfc822_date            (gchar          *buf,
 458                                  gint            len);
 459
 460 size_t fast_strftime            (gchar                  *buf,
 461                                  gint                    buflen,
 462                                  const gchar            *format,
 463                                  struct tm              *lt);
 464
 465 /* debugging */
 466 void debug_print_real   (const gchar *format, ...) G_GNUC_PRINTF(1, 2);
 467 const char * debug_srcname (const char *file);
 468
 469 /* subject threading */
 470 void * subject_table_lookup(GHashTable *subject_table, gchar * subject);
 471 void subject_table_insert(GHashTable *subject_table, gchar * subject,
 472                           void * data);
 473 void subject_table_remove(GHashTable *subject_table, gchar * subject);
 474 void utils_free_regex(void);
 475 gint subject_get_prefix_length (const gchar *subject);
 476
 477 /* quoting recognition */
 478 const gchar * line_has_quote_char       (const gchar *str,
 479                                          const gchar *quote_chars);
 480
 481 gint g_int_compare      (gconstpointer a, gconstpointer b);
 482
 483 gchar *generate_msgid           (gchar *buf, gint len);
 484 gchar *generate_mime_boundary   (const gchar *prefix);
 485
 486 gint quote_cmd_argument(gchar * result, guint size,
 487                         const gchar * path);
 488 GNode *g_node_map(GNode *node, GNodeMapFunc func, gpointer data);
 489
 490 gboolean get_hex_value(guchar *out, gchar c1, gchar c2);
 491 void get_hex_str(gchar *out, guchar ch);
 492
 493 /* auto pointer for containers that support GType system */
 494
 495 #define G_TYPE_AUTO_POINTER     g_auto_pointer_register()
 496 typedef struct AutoPointer      GAuto;
 497 GType g_auto_pointer_register           (void);
 498 GAuto *g_auto_pointer_new               (gpointer pointer);
 499 GAuto *g_auto_pointer_new_with_free     (gpointer p,
 500                                          GFreeFunc free);
 501 gpointer g_auto_pointer_get_ptr         (GAuto *auto_ptr);
 502 GAuto *g_auto_pointer_copy              (GAuto *auto_ptr);
 503 void g_auto_pointer_free                (GAuto *auto_ptr);
 504 void replace_returns                    (gchar *str);
 505 gboolean get_uri_part   (const gchar *start,
 506                          const gchar *scanpos,
 507                          const gchar **bp,
 508                          const gchar **ep,
 509                          gboolean hdr);
 510 gchar *make_uri_string  (const gchar *bp,
 511                          const gchar *ep);
 512 gboolean get_email_part (const gchar *start,
 513                          const gchar *scanpos,
 514                          const gchar **bp,
 515                          const gchar **ep,
 516                          gboolean hdr);
 517 gchar *make_email_string(const gchar *bp,
 518                          const gchar *ep);
 519 gchar *make_http_string (const gchar *bp,
 520                          const gchar *ep);
 521
 522 gchar *mailcap_get_command_for_type(const gchar *type,
 523                                     const gchar *file_to_open);
 524 void mailcap_update_default        (const gchar *type,
 525                                     const gchar *command);
 526
 527 gboolean file_is_email(const gchar *filename);
 528 gboolean sc_g_list_bigger(GList *list, gint max);
 529 gboolean sc_g_slist_bigger(GSList *list, gint max);
 530
 531 int claws_unlink(const gchar *filename);
 532 #ifdef __cplusplus
 533 }
 534 #endif
 535
 536 #endif /* __UTILS_H__ */