src/msgcache.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "defs.h"
  21
  22 #include <glib.h>
  23
  24 #include <time.h>
  25
  26 #include "intl.h"
  27 #include "msgcache.h"
  28 #include "utils.h"
  29 #include "procmsg.h"
  30
  31 struct _MsgCache {
  32         GHashTable      *msgnum_table;
  33         GHashTable      *msgid_table;
  34         guint            memusage;
  35         time_t           last_access;
  36 };
  37
  38 MsgCache *msgcache_new()
  39 {
  40         MsgCache *cache;
  41
  42         cache = g_new0(MsgCache, 1),
  43         cache->msgnum_table = g_hash_table_new(g_int_hash, g_int_equal);
  44         cache->msgid_table = g_hash_table_new(g_str_hash, g_str_equal);
  45         cache->last_access = time(NULL);
  46
  47         return cache;
  48 }
  49
  50 static gboolean msgcache_msginfo_free_func(gpointer num, gpointer msginfo, gpointer user_data)
  51 {
  52         procmsg_msginfo_free((MsgInfo *)msginfo);
  53         return TRUE;
  54 }
  55
  56 void msgcache_destroy(MsgCache *cache)
  57 {
  58         g_return_if_fail(cache != NULL);
  59
  60         g_hash_table_foreach_remove(cache->msgnum_table, msgcache_msginfo_free_func, NULL);
  61         g_hash_table_destroy(cache->msgid_table);
  62         g_hash_table_destroy(cache->msgnum_table);
  63         g_free(cache);
  64 }
  65
  66 void msgcache_add_msg(MsgCache *cache, MsgInfo *msginfo)
  67 {
  68         MsgInfo *newmsginfo;
  69
  70         g_return_if_fail(cache != NULL);
  71         g_return_if_fail(msginfo != NULL);
  72
  73         newmsginfo = procmsg_msginfo_new_ref(msginfo);
  74         g_hash_table_insert(cache->msgnum_table, &newmsginfo->msgnum, newmsginfo);
  75         if(newmsginfo->msgid != NULL)
  76                 g_hash_table_insert(cache->msgid_table, newmsginfo->msgid, newmsginfo);
  77         cache->memusage += procmsg_msginfo_memusage(msginfo);
  78         cache->last_access = time(NULL);
  79
  80         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
  81 }
  82
  83 void msgcache_remove_msg(MsgCache *cache, guint msgnum)
  84 {
  85         MsgInfo *msginfo;
  86
  87         g_return_if_fail(cache != NULL);
  88         g_return_if_fail(msgnum > 0);
  89
  90         msginfo = (MsgInfo *) g_hash_table_lookup(cache->msgnum_table, &msgnum);
  91         if(!msginfo)
  92                 return;
  93
  94         cache->memusage -= procmsg_msginfo_memusage(msginfo);
  95         if(msginfo->msgid)
  96                 g_hash_table_remove(cache->msgid_table, msginfo->msgid);
  97         g_hash_table_remove(cache->msgnum_table, &msginfo->msgnum);
  98         procmsg_msginfo_free(msginfo);
  99         cache->last_access = time(NULL);
 100
 101         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 102 }
 103
 104 void msgcache_update_msg(MsgCache *cache, MsgInfo *msginfo)
 105 {
 106         MsgInfo *oldmsginfo, *newmsginfo;
 107
 108         g_return_if_fail(cache != NULL);
 109         g_return_if_fail(msginfo != NULL);
 110
 111         oldmsginfo = g_hash_table_lookup(cache->msgnum_table, &msginfo->msgnum);
 112         if(msginfo) {
 113                 g_hash_table_remove(cache->msgid_table, oldmsginfo->msgid);
 114                 g_hash_table_remove(cache->msgnum_table, &oldmsginfo->msgnum);
 115                 procmsg_msginfo_free(oldmsginfo);
 116         }
 117         cache->memusage -= procmsg_msginfo_memusage(oldmsginfo);
 118
 119         newmsginfo = procmsg_msginfo_new_ref(msginfo);
 120         g_hash_table_insert(cache->msgnum_table, &newmsginfo->msgnum, newmsginfo);
 121         if(newmsginfo->msgid)
 122                 g_hash_table_insert(cache->msgid_table, newmsginfo->msgid, newmsginfo);
 123         cache->memusage += procmsg_msginfo_memusage(newmsginfo);
 124         cache->last_access = time(NULL);
 125
 126         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 127
 128         return;
 129 }
 130
 131 static gint msgcache_read_cache_data_str(FILE *fp, gchar **str)
 132 {
 133         gchar buf[BUFFSIZE];
 134         gint ret = 0;
 135         size_t len;
 136
 137         if (fread(&len, sizeof(len), 1, fp) == 1) {
 138                 if (len < 0)
 139                         ret = -1;
 140                 else {
 141                         gchar *tmp = NULL;
 142
 143                         while (len > 0) {
 144                                 size_t size = MIN(len, BUFFSIZE - 1);
 145
 146                                 if (fread(buf, size, 1, fp) != 1) {
 147                                         ret = -1;
 148                                         if (tmp) g_free(tmp);
 149                                         *str = NULL;
 150                                         break;
 151                                 }
 152
 153                                 buf[size] = '\0';
 154                                 if (tmp) {
 155                                         *str = g_strconcat(tmp, buf, NULL);
 156                                         g_free(tmp);
 157                                         tmp = *str;
 158                                 } else
 159                                         tmp = *str = g_strdup(buf);
 160
 161                                 len -= size;
 162                         }
 163                 }
 164         } else
 165                 ret = -1;
 166
 167         if (ret < 0)
 168                 g_warning("Cache data is corrupted\n");
 169
 170         return ret;
 171 }
 172
 173
 174 #define READ_CACHE_DATA(data, fp) \
 175 { \
 176         if (msgcache_read_cache_data_str(fp, &data) < 0) { \
 177                 procmsg_msginfo_free(msginfo); \
 178                 error = TRUE; \
 179                 break; \
 180         } \
 181 }
 182
 183 #define READ_CACHE_DATA_INT(n, fp) \
 184 { \
 185         if (fread(&n, sizeof(n), 1, fp) != 1) { \
 186                 g_warning("Cache data is corrupted\n"); \
 187                 procmsg_msginfo_free(msginfo); \
 188                 error = TRUE; \
 189                 break; \
 190         } \
 191 }
 192
 193 MsgCache *msgcache_read_cache(FolderItem *item, const gchar *cache_file)
 194 {
 195         MsgCache *cache;
 196         FILE *fp;
 197         MsgInfo *msginfo;
 198         MsgTmpFlags tmp_flags = 0;
 199         gchar file_buf[BUFFSIZE];
 200         gint ver;
 201         guint num;
 202         gboolean error = FALSE;
 203
 204         g_return_val_if_fail(cache_file != NULL, NULL);
 205         g_return_val_if_fail(item != NULL, NULL);
 206
 207         if ((fp = fopen(cache_file, "rb")) == NULL) {
 208                 debug_print("\tNo cache file\n");
 209                 return NULL;
 210         }
 211         setvbuf(fp, file_buf, _IOFBF, sizeof(file_buf));
 212
 213         debug_print("\tReading message cache from %s...\n", cache_file);
 214
 215         /* compare cache version */
 216         if (fread(&ver, sizeof(ver), 1, fp) != 1 ||
 217             CACHE_VERSION != ver) {
 218                 debug_print("Cache version is different. Discarding it.\n");
 219                 fclose(fp);
 220                 return NULL;
 221         }
 222
 223         if (item->stype == F_QUEUE) {
 224                 tmp_flags |= MSG_QUEUED;
 225         } else if (item->stype == F_DRAFT) {
 226                 tmp_flags |= MSG_DRAFT;
 227         }
 228
 229         cache = msgcache_new();
 230
 231         g_hash_table_freeze(cache->msgnum_table);
 232
 233         while (fread(&num, sizeof(num), 1, fp) == 1) {
 234                 msginfo = procmsg_msginfo_new();
 235                 msginfo->msgnum = num;
 236                 READ_CACHE_DATA_INT(msginfo->size, fp);
 237                 READ_CACHE_DATA_INT(msginfo->mtime, fp);
 238                 READ_CACHE_DATA_INT(msginfo->date_t, fp);
 239                 READ_CACHE_DATA_INT(msginfo->flags.tmp_flags, fp);
 240
 241                 READ_CACHE_DATA(msginfo->fromname, fp);
 242
 243                 READ_CACHE_DATA(msginfo->date, fp);
 244                 READ_CACHE_DATA(msginfo->from, fp);
 245                 READ_CACHE_DATA(msginfo->to, fp);
 246                 READ_CACHE_DATA(msginfo->cc, fp);
 247                 READ_CACHE_DATA(msginfo->newsgroups, fp);
 248                 READ_CACHE_DATA(msginfo->subject, fp);
 249                 READ_CACHE_DATA(msginfo->msgid, fp);
 250                 READ_CACHE_DATA(msginfo->inreplyto, fp);
 251                 READ_CACHE_DATA(msginfo->references, fp);
 252                 READ_CACHE_DATA(msginfo->xref, fp);
 253
 254                 msginfo->folder = item;
 255                 msginfo->flags.tmp_flags |= tmp_flags;
 256
 257                 g_hash_table_insert(cache->msgnum_table, &msginfo->msgnum, msginfo);
 258                 if(msginfo->msgid)
 259                         g_hash_table_insert(cache->msgid_table, msginfo->msgid, msginfo);
 260                 cache->memusage += procmsg_msginfo_memusage(msginfo);
 261         }
 262         fclose(fp);
 263
 264         if(error) {
 265                 g_hash_table_thaw(cache->msgnum_table);
 266                 msgcache_destroy(cache);
 267                 return NULL;
 268         }
 269
 270         cache->last_access = time(NULL);
 271         g_hash_table_thaw(cache->msgnum_table);
 272
 273         debug_print("done. (%d items read)\n", g_hash_table_size(cache->msgnum_table));
 274         debug_print("Cache size: %d messages, %d byte\n", g_hash_table_size(cache->msgnum_table), cache->memusage);
 275
 276         return cache;
 277 }
 278
 279 void msgcache_read_mark(MsgCache *cache, const gchar *mark_file)
 280 {
 281         FILE *fp;
 282         MsgInfo *msginfo;
 283         MsgPermFlags perm_flags;
 284         gint ver;
 285         guint num;
 286
 287         if ((fp = fopen(mark_file, "rb")) == NULL) {
 288                 debug_print("Mark file not found.\n");
 289                 return;
 290         } else if (fread(&ver, sizeof(ver), 1, fp) != 1 || MARK_VERSION != ver) {
 291                 debug_print("Mark version is different (%d != %d). "
 292                               "Discarding it.\n", ver, MARK_VERSION);
 293         } else {
 294                 debug_print("\tReading message marks from %s...\n", mark_file);
 295
 296                 while (fread(&num, sizeof(num), 1, fp) == 1) {
 297                         if (fread(&perm_flags, sizeof(perm_flags), 1, fp) != 1) break;
 298
 299                         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 300                         if(msginfo) {
 301                                 msginfo->flags.perm_flags = perm_flags;
 302                         }
 303                 }
 304         }
 305         fclose(fp);
 306 }
 307
 308 #define WRITE_CACHE_DATA_INT(n, fp) \
 309         fwrite(&n, sizeof(n), 1, fp)
 310
 311 #define WRITE_CACHE_DATA(data, fp) \
 312 { \
 313         gint len; \
 314  \
 315         if (data == NULL || (len = strlen(data)) == 0) { \
 316                 len = 0; \
 317                 WRITE_CACHE_DATA_INT(len, fp); \
 318         } else { \
 319                 len = strlen(data); \
 320                 WRITE_CACHE_DATA_INT(len, fp); \
 321                 fwrite(data, len, 1, fp); \
 322         } \
 323 }
 324
 325 void msgcache_write_cache(MsgInfo *msginfo, FILE *fp)
 326 {
 327         MsgTmpFlags flags = msginfo->flags.tmp_flags & MSG_CACHED_FLAG_MASK;
 328
 329         WRITE_CACHE_DATA_INT(msginfo->msgnum, fp);
 330         WRITE_CACHE_DATA_INT(msginfo->size, fp);
 331         WRITE_CACHE_DATA_INT(msginfo->mtime, fp);
 332         WRITE_CACHE_DATA_INT(msginfo->date_t, fp);
 333         WRITE_CACHE_DATA_INT(flags, fp);
 334
 335         WRITE_CACHE_DATA(msginfo->fromname, fp);
 336
 337         WRITE_CACHE_DATA(msginfo->date, fp);
 338         WRITE_CACHE_DATA(msginfo->from, fp);
 339         WRITE_CACHE_DATA(msginfo->to, fp);
 340         WRITE_CACHE_DATA(msginfo->cc, fp);
 341         WRITE_CACHE_DATA(msginfo->newsgroups, fp);
 342         WRITE_CACHE_DATA(msginfo->subject, fp);
 343         WRITE_CACHE_DATA(msginfo->msgid, fp);
 344         WRITE_CACHE_DATA(msginfo->inreplyto, fp);
 345         WRITE_CACHE_DATA(msginfo->references, fp);
 346         WRITE_CACHE_DATA(msginfo->xref, fp);
 347 }
 348
 349 static void msgcache_write_flags(MsgInfo *msginfo, FILE *fp)
 350 {
 351         MsgPermFlags flags = msginfo->flags.perm_flags;
 352
 353         WRITE_CACHE_DATA_INT(msginfo->msgnum, fp);
 354         WRITE_CACHE_DATA_INT(flags, fp);
 355 }
 356
 357 struct write_fps
 358 {
 359         FILE *cache_fp;
 360         FILE *mark_fp;
 361 };
 362
 363 static void msgcache_write_func(gpointer key, gpointer value, gpointer user_data)
 364 {
 365         MsgInfo *msginfo;
 366         struct write_fps *write_fps;
 367
 368         msginfo = (MsgInfo *)value;
 369         write_fps = user_data;
 370
 371         msgcache_write_cache(msginfo, write_fps->cache_fp);
 372         msgcache_write_flags(msginfo, write_fps->mark_fp);
 373 }
 374
 375 gint msgcache_write(const gchar *cache_file, const gchar *mark_file, MsgCache *cache)
 376 {
 377         FILE *fp;
 378         struct write_fps write_fps;
 379         gint ver;
 380
 381         g_return_val_if_fail(cache_file != NULL, -1);
 382         g_return_val_if_fail(mark_file != NULL, -1);
 383         g_return_val_if_fail(cache != NULL, -1);
 384
 385         debug_print("\tWriting message cache to %s and %s...\n", cache_file, mark_file);
 386
 387         if ((fp = fopen(cache_file, "wb")) == NULL) {
 388                 FILE_OP_ERROR(cache_file, "fopen");
 389                 return -1;
 390         }
 391         if (change_file_mode_rw(fp, cache_file) < 0)
 392                 FILE_OP_ERROR(cache_file, "chmod");
 393
 394         ver = CACHE_VERSION;
 395         WRITE_CACHE_DATA_INT(ver, fp);
 396         write_fps.cache_fp = fp;
 397
 398         if ((fp = fopen(mark_file, "wb")) == NULL) {
 399                 FILE_OP_ERROR(mark_file, "fopen");
 400                 fclose(write_fps.cache_fp);
 401                 return -1;
 402         }
 403
 404         ver = MARK_VERSION;
 405         WRITE_CACHE_DATA_INT(ver, fp);
 406         write_fps.mark_fp = fp;
 407
 408         g_hash_table_foreach(cache->msgnum_table, msgcache_write_func, (gpointer)&write_fps);
 409
 410         fclose(write_fps.cache_fp);
 411         fclose(write_fps.mark_fp);
 412
 413         cache->last_access = time(NULL);
 414
 415         debug_print("done.\n");
 416         return 0;
 417 }
 418
 419 MsgInfo *msgcache_get_msg(MsgCache *cache, guint num)
 420 {
 421         MsgInfo *msginfo;
 422
 423         g_return_val_if_fail(cache != NULL, NULL);
 424
 425         msginfo = g_hash_table_lookup(cache->msgnum_table, &num);
 426         if(!msginfo)
 427                 return NULL;
 428         cache->last_access = time(NULL);
 429
 430         return procmsg_msginfo_new_ref(msginfo);
 431 }
 432
 433 MsgInfo *msgcache_get_msg_by_id(MsgCache *cache, const gchar *msgid)
 434 {
 435         MsgInfo *msginfo;
 436
 437         g_return_val_if_fail(cache != NULL, NULL);
 438
 439         msginfo = g_hash_table_lookup(cache->msgid_table, msgid);
 440         if(!msginfo)
 441                 return NULL;
 442         cache->last_access = time(NULL);
 443
 444         return procmsg_msginfo_new_ref(msginfo);
 445 }
 446
 447 static void msgcache_get_msg_list_func(gpointer key, gpointer value, gpointer user_data)
 448 {
 449         GSList **listptr = user_data;
 450         MsgInfo *msginfo = value;
 451
 452         *listptr = g_slist_prepend(*listptr, procmsg_msginfo_new_ref(msginfo));
 453 }
 454
 455 GSList *msgcache_get_msg_list(MsgCache *cache)
 456 {
 457         GSList *msg_list = NULL;
 458
 459         g_return_val_if_fail(cache != NULL, NULL);
 460
 461         g_hash_table_foreach((GHashTable *)cache->msgnum_table, msgcache_get_msg_list_func, (gpointer)&msg_list);
 462         cache->last_access = time(NULL);
 463
 464         msg_list = g_slist_reverse(msg_list);
 465
 466         return msg_list;
 467 }
 468
 469 time_t msgcache_get_last_access_time(MsgCache *cache)
 470 {
 471         g_return_val_if_fail(cache != NULL, 0);
 472
 473         return cache->last_access;
 474 }
 475
 476 gint msgcache_get_memory_usage(MsgCache *cache)
 477 {
 478         g_return_val_if_fail(cache != NULL, 0);
 479
 480         return cache->memusage;
 481 }