Mercurial > hg > dmlib
annotate dmres.c @ 4:e0fc7863d024
Mask out bits from resFlags that should not be there after initialization.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Fri, 28 Sep 2012 03:45:02 +0300 |
| parents | 32250b436bca |
| children | 2f463a59d732 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * dmlib | |
| 3 * -- Resource management | |
| 4 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 5 * (C) Copyright 2003-2012 Tecnic Software productions (TNSP) | |
| 6 */ | |
| 7 #include "dmres.h" | |
| 8 #include <time.h> | |
| 9 | |
| 10 #if !defined(DMRES_PACKFS) && !defined(DMRES_STDIO) | |
| 11 #error At least one of DMRES_PACKFS, DMRES_STDIO must be defined. | |
| 12 #endif | |
| 13 | |
| 14 #define DMRES_LOCK(x) dmMutexLock(dfResourcesMutex) | |
| 15 #define DMRES_UNLOCK(x) dmMutexUnlock(dfResourcesMutex) | |
| 16 | |
| 17 | |
| 18 /* Global variables | |
| 19 */ | |
| 20 static BOOL dfResInitialized = FALSE; | |
| 21 static int dfResFlags = 0; | |
| 22 static char * dfResPath = NULL; | |
| 23 DMResource * dfResources = NULL; | |
| 24 DMMutex * dfResourcesMutex = NULL; | |
| 25 | |
| 26 | |
| 27 #ifdef DMRES_PACKFS | |
| 28 static DMPackFile *dfResPackFile = NULL; | |
| 29 static char * dfResPackFilename = NULL; | |
| 30 #endif | |
| 31 | |
| 32 | |
| 33 DMResource *dmres_new(const char *filename, int flags, size_t size) | |
| 34 { | |
| 35 DMResource *res = dmMalloc0(sizeof(DMResource)); | |
| 36 if (res == NULL) | |
| 37 return NULL; | |
| 38 | |
| 39 res->filename = dm_strdup(filename); | |
| 40 res->flags = flags; | |
| 41 res->dataSize = size; | |
| 42 | |
| 43 return res; | |
| 44 } | |
| 45 | |
| 46 | |
| 47 void dmres_free(DMResource *res) | |
| 48 { | |
| 49 if (res != NULL) | |
| 50 { | |
| 51 dmFree(res->filename); | |
| 52 dmFree(res->data); | |
| 53 dmFree(res); | |
| 54 } | |
| 55 } | |
| 56 | |
| 57 | |
| 58 void dmres_insert(DMResource * node) | |
| 59 { | |
| 60 if (dfResources != NULL) | |
| 61 { | |
| 62 node->prev = dfResources->prev; | |
| 63 dfResources->prev->next = node; | |
| 64 dfResources->prev = node; | |
| 65 } | |
| 66 else | |
| 67 { | |
| 68 dfResources = node->prev = node; | |
| 69 } | |
| 70 | |
| 71 node->next = NULL; | |
| 72 } | |
| 73 | |
| 74 | |
| 75 void dmres_delete(DMResource * node) | |
| 76 { | |
| 77 if (node->prev) | |
| 78 node->prev->next = node->next; | |
| 79 | |
| 80 if (node->next) | |
| 81 node->next->prev = node->prev; | |
| 82 else | |
| 83 dfResources->prev = node->prev; | |
| 84 | |
| 85 node->prev = node->next = NULL; | |
| 86 } | |
| 87 | |
| 88 | |
| 89 DMResource * dmres_find(const char *filename) | |
| 90 { | |
| 91 DMResource *node, *found = NULL; | |
| 92 | |
| 93 DMRES_LOCK(); | |
| 94 | |
| 95 for (node = dfResources; node != NULL; node = node->next) | |
| 96 { | |
| 97 if (strcmp(node->filename, filename) == 0) | |
| 98 { | |
| 99 found = node; | |
| 100 break; | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 DMRES_UNLOCK(); | |
| 105 | |
| 106 return found; | |
| 107 } | |
| 108 | |
| 109 | |
| 110 #ifdef DMRES_STDIO | |
| 111 /* Basic stdio file routines | |
| 112 */ | |
| 113 static int dm_stdio_fopen(DMResource *handle) | |
| 114 { | |
| 115 char *rfilename = dm_strdup_printf("%s%s", DMRES_DATA_PATH, handle->filename); | |
| 116 if (rfilename == NULL) | |
| 117 return DMERR_MALLOC; | |
| 118 | |
| 119 handle->fh = fopen(rfilename, "rb"); | |
| 120 dmFree(rfilename); | |
| 121 | |
| 122 handle->error = dmGetErrno(); | |
| 123 return (handle->fh != NULL) ? DMERR_OK : DMERR_FOPEN; | |
| 124 } | |
| 125 | |
| 126 | |
| 127 static void dm_stdio_fclose(DMResource * f) | |
| 128 { | |
| 129 if (f->fh != NULL) | |
| 130 { | |
| 131 fclose(f->fh); | |
| 132 f->fh = NULL; | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 | |
| 137 static int dm_stdio_ferror(DMResource * f) | |
| 138 { | |
| 139 return f->error; | |
| 140 } | |
| 141 | |
| 142 | |
| 143 static int dm_stdio_fseek(DMResource *f, const off_t pos, const int whence) | |
| 144 { | |
| 145 int ret = fseek(f->fh, pos, whence); | |
| 146 f->error = dmGetErrno(); | |
| 147 return ret; | |
| 148 } | |
| 149 | |
| 150 | |
| 151 static off_t dm_stdio_fsize(DMResource *f) | |
| 152 { | |
| 153 off_t savePos, fileSize; | |
| 154 | |
| 155 // Check if the size is cached | |
| 156 if (f->dataSize != 0) | |
| 157 return f->dataSize; | |
| 158 | |
| 159 // Get file size | |
| 160 savePos = ftell(f->fh); | |
| 161 if (fseek(f->fh, 0L, SEEK_END) != 0) | |
| 162 { | |
| 163 f->error = dmGetErrno(); | |
| 164 return -1; | |
| 165 } | |
| 166 | |
| 167 fileSize = ftell(f->fh); | |
| 168 if (fseek(f->fh, savePos, SEEK_SET) != 0) | |
| 169 { | |
| 170 f->error = dmGetErrno(); | |
| 171 return -1; | |
| 172 } | |
| 173 | |
| 174 f->dataSize = fileSize; | |
| 175 return fileSize; | |
| 176 } | |
| 177 | |
| 178 | |
| 179 static off_t dm_stdio_ftell(DMResource * f) | |
| 180 { | |
| 181 return ftell(f->fh); | |
| 182 } | |
| 183 | |
| 184 | |
| 185 static BOOL dm_stdio_feof(DMResource * f) | |
| 186 { | |
| 187 return feof(f->fh); | |
| 188 } | |
| 189 | |
| 190 | |
| 191 static int dm_stdio_fgetc(DMResource * f) | |
| 192 { | |
| 193 int ret = fgetc(f->fh); | |
| 194 f->error = dmGetErrno(); | |
| 195 return ret; | |
| 196 } | |
| 197 | |
| 198 | |
| 199 static size_t dm_stdio_fread(void *ptr, size_t size, size_t nmemb, DMResource * f) | |
| 200 { | |
| 201 size_t ret = fread(ptr, size, nmemb, f->fh); | |
| 202 f->error = dmGetErrno(); | |
| 203 return ret; | |
| 204 } | |
| 205 | |
| 206 | |
| 207 static int dm_stdio_preload(DMResource *handle) | |
| 208 { | |
| 209 int ret = dm_stdio_fopen(handle); | |
| 210 if (ret != DMERR_OK) | |
| 211 return ret; | |
| 212 | |
| 213 dm_stdio_fsize(handle); | |
| 214 | |
| 215 handle->data = dmMalloc(handle->dataSize); | |
| 216 if (handle->data == NULL) | |
| 217 return DMERR_MALLOC; | |
| 218 | |
| 219 if (dm_stdio_fread(handle->data, sizeof(Uint8), handle->dataSize, handle) != handle->dataSize) | |
| 220 return DMERR_FREAD; | |
| 221 | |
| 222 return DMERR_OK; | |
| 223 } | |
| 224 | |
| 225 | |
| 226 DMResourceOps dfStdioFileOps = | |
| 227 { | |
| 228 dm_stdio_ferror, | |
| 229 dm_stdio_fseek, | |
| 230 dm_stdio_fsize, | |
| 231 dm_stdio_ftell, | |
| 232 dm_stdio_feof, | |
| 233 dm_stdio_fgetc, | |
| 234 dm_stdio_fread, | |
| 235 | |
| 236 dm_stdio_fopen, | |
| 237 dm_stdio_fclose, | |
| 238 dm_stdio_preload | |
| 239 }; | |
| 240 | |
| 241 DMResourceOps dfStdioFHOps = | |
| 242 { | |
| 243 dm_stdio_ferror, | |
| 244 dm_stdio_fseek, | |
| 245 dm_stdio_fsize, | |
| 246 dm_stdio_ftell, | |
| 247 dm_stdio_feof, | |
| 248 dm_stdio_fgetc, | |
| 249 dm_stdio_fread, | |
| 250 | |
| 251 NULL, | |
| 252 NULL, | |
| 253 NULL | |
| 254 }; | |
| 255 #endif | |
| 256 | |
| 257 | |
| 258 // Some mingw/windows headers define these as macros, which is bad for us | |
| 259 #ifdef __WIN32 | |
| 260 #undef ferror | |
| 261 #undef feof | |
| 262 #endif | |
| 263 | |
| 264 | |
| 265 /* | |
| 266 * PACK file routines | |
| 267 */ | |
| 268 #ifdef DMRES_PACKFS | |
| 269 static int dm_pack_preload(DMResource *handle) | |
| 270 { | |
| 271 DMPackEntry *node; | |
| 272 int res = DMERR_OK, cres, cdataLeft; | |
| 273 z_stream cstream; | |
| 274 Uint8 * cbuffer = NULL; | |
| 275 | |
| 276 // Search PACK nodelist for file | |
| 277 if ((node = dm_pack_find(dfResPackFile->entries, handle->filename)) == NULL) | |
| 278 { | |
| 279 dmError("Entry '%s' not found in PACK file.\n", handle->filename); | |
| 280 res = DMERR_NOT_FOUND; | |
| 281 goto error; | |
| 282 } | |
| 283 | |
| 284 // Seek to entry | |
| 285 if (fseek(dfResPackFile->file, node->offset, SEEK_SET) == -1) | |
| 286 { | |
| 287 dmError("Could not seek node position in PACK file.\n"); | |
| 288 res = DMERR_FSEEK; | |
| 289 goto error; | |
| 290 } | |
| 291 | |
| 292 // Allocate a structures and buffers | |
| 293 cbuffer = (Uint8 *) dmMalloc(DPACK_TMPSIZE); | |
| 294 if (cbuffer == NULL) | |
| 295 { | |
| 296 res = DMERR_MALLOC; | |
| 297 goto error; | |
| 298 } | |
| 299 | |
| 300 // Initialize fields | |
| 301 handle->dataOffset = 0; | |
| 302 handle->dataSize = node->size; | |
| 303 handle->data = (Uint8 *) dmMalloc(node->size); | |
| 304 if (handle->data == NULL) | |
| 305 { | |
| 306 res = DMERR_MALLOC; | |
| 307 goto error; | |
| 308 } | |
| 309 | |
| 310 // Initialize decompression | |
| 311 cstream.zalloc = (alloc_func) Z_NULL; | |
| 312 cstream.zfree = (free_func) Z_NULL; | |
| 313 cstream.opaque = (voidpf) Z_NULL; | |
| 314 cstream.next_out = handle->data; | |
| 315 cstream.avail_out = handle->dataSize; | |
| 316 cdataLeft = node->length; | |
| 317 cres = inflateInit(&(cstream)); | |
| 318 if (cres != Z_OK) | |
| 319 { | |
| 320 dmError("Could not initialize zlib stream inflation.\n"); | |
| 321 res = DMERR_INIT_FAIL; | |
| 322 goto error; | |
| 323 } | |
| 324 | |
| 325 // Uncompress the data | |
| 326 while (cdataLeft > 0 && | |
| 327 cstream.avail_out > 0 && cres == Z_OK) | |
| 328 { | |
| 329 cstream.avail_in = fread( | |
| 330 cbuffer, sizeof(Uint8), | |
| 331 (cdataLeft >= DPACK_TMPSIZE) ? DPACK_TMPSIZE : cdataLeft, | |
| 332 dfResPackFile->file); | |
| 333 | |
| 334 cdataLeft -= cstream.avail_in; | |
| 335 cstream.next_in = cbuffer; | |
| 336 cres = inflate(&cstream, Z_FULL_FLUSH); | |
| 337 } | |
| 338 | |
| 339 // Cleanup | |
| 340 inflateEnd(&(cstream)); | |
| 341 | |
| 342 error: | |
| 343 dmFree(cbuffer); | |
| 344 return res; | |
| 345 } | |
| 346 #endif | |
| 347 | |
| 348 | |
| 349 static void dm_mem_fclose(DMResource * f) | |
| 350 { | |
| 351 f->dataSize = 0; | |
| 352 f->dataOffset = 0; | |
| 353 dmFree(f->data); | |
| 354 f->data = NULL; | |
| 355 } | |
| 356 | |
| 357 | |
| 358 static int dm_mem_ferror(DMResource * f) | |
| 359 { | |
| 360 return f->error; | |
| 361 } | |
| 362 | |
| 363 | |
| 364 static int dm_mem_fseek(DMResource * f, const off_t offset, const int whence) | |
| 365 { | |
| 366 off_t newPos; | |
| 367 | |
| 368 // Calculate the new position | |
| 369 switch (whence) | |
| 370 { | |
| 371 case SEEK_SET: | |
| 372 newPos = offset; | |
| 373 break; | |
| 374 | |
| 375 case SEEK_CUR: | |
| 376 newPos = f->dataOffset + offset; | |
| 377 break; | |
| 378 | |
| 379 case SEEK_END: | |
| 380 newPos = f->dataSize + offset; | |
| 381 break; | |
| 382 | |
| 383 default: | |
| 384 return -1; | |
| 385 } | |
| 386 | |
| 387 // Set the new position | |
| 388 f->dataOffset = newPos; | |
| 389 | |
| 390 // Check the new position | |
| 391 if (newPos < 0 && (size_t) newPos >= f->dataSize) | |
| 392 return -1; | |
| 393 | |
| 394 return 0; | |
| 395 } | |
| 396 | |
| 397 | |
| 398 static off_t dm_mem_fsize(DMResource * f) | |
| 399 { | |
| 400 return f->dataSize; | |
| 401 } | |
| 402 | |
| 403 | |
| 404 static off_t dm_mem_ftell(DMResource * f) | |
| 405 { | |
| 406 return f->dataOffset; | |
| 407 } | |
| 408 | |
| 409 | |
| 410 static BOOL dm_mem_feof(DMResource * f) | |
| 411 { | |
| 412 // Check for EOF | |
| 413 if ((size_t) f->dataOffset <= f->dataSize) | |
| 414 return FALSE; | |
| 415 else | |
| 416 return TRUE; | |
| 417 } | |
| 418 | |
| 419 | |
| 420 static int dm_mem_fgetc(DMResource * f) | |
| 421 { | |
| 422 // Check for EOF | |
| 423 if ((size_t) f->dataOffset < f->dataSize) | |
| 424 return (int) f->data[f->dataOffset++]; | |
| 425 else | |
| 426 return EOF; | |
| 427 } | |
| 428 | |
| 429 | |
| 430 static size_t dm_mem_fread(void *buf, size_t size, size_t nmemb, DMResource * f) | |
| 431 { | |
| 432 size_t length = (size * nmemb); | |
| 433 | |
| 434 // Check if we can read the whole chunk | |
| 435 if (((size_t) f->dataOffset + length) >= f->dataSize) | |
| 436 { | |
| 437 nmemb = (f->dataSize - f->dataOffset) / size; | |
| 438 length = size * nmemb; | |
| 439 } | |
| 440 | |
| 441 memcpy(buf, f->data + f->dataOffset, length); | |
| 442 f->dataOffset += length; | |
| 443 return nmemb; | |
| 444 } | |
| 445 | |
| 446 | |
| 447 DMResourceOps dfPackFileOps = | |
| 448 { | |
| 449 dm_mem_ferror, | |
| 450 dm_mem_fseek, | |
| 451 dm_mem_fsize, | |
| 452 dm_mem_ftell, | |
| 453 dm_mem_feof, | |
| 454 dm_mem_fgetc, | |
| 455 dm_mem_fread, | |
| 456 | |
| 457 NULL, | |
| 458 dm_mem_fclose, | |
| 459 dm_pack_preload | |
| 460 }; | |
| 461 | |
| 462 | |
| 463 DMResourceOps dfMemIOFileOps = | |
| 464 { | |
| 465 dm_mem_ferror, | |
| 466 dm_mem_fseek, | |
| 467 dm_mem_fsize, | |
| 468 dm_mem_ftell, | |
| 469 dm_mem_feof, | |
| 470 dm_mem_fgetc, | |
| 471 dm_mem_fread, | |
| 472 | |
| 473 NULL, | |
| 474 NULL, | |
| 475 NULL | |
| 476 }; | |
| 477 | |
| 478 | |
| 479 /* FS file handling functions. These functions call the actual | |
| 480 * functions depending on where the file is located. | |
| 481 */ | |
| 482 DMResource *dmf_open(const char *filename) | |
| 483 { | |
| 484 int ret; | |
| 485 DMResource *handle; | |
| 486 | |
| 487 // Check master directory for resource | |
| 488 if ((handle = dmres_find(filename)) == NULL) | |
| 489 { | |
| 490 #ifdef DMRES_STDIO | |
| 491 // Hmm.. does not exist? Fall back to a stdio file | |
| 492 handle = dmres_new(filename, 0, 0); | |
| 493 if (handle == NULL) | |
| 494 return NULL; | |
| 495 | |
| 496 handle->fops = &dfStdioFileOps; | |
| 497 dmres_insert(handle); | |
| 498 #else | |
| 499 // Stdio not enabled, fail | |
| 500 return NULL; | |
| 501 #endif | |
| 502 } | |
| 503 | |
| 504 // Check fops | |
| 505 if (handle->fops == NULL) | |
| 506 { | |
| 507 #ifdef DMRES_PACKFS | |
| 508 if (dfResFlags & DRF_USE_PACK) | |
| 509 handle->fops = &dfPackFileOps; | |
| 510 #ifdef DMRES_STDIO | |
| 511 else | |
| 512 handle->fops = &dfStdioFileOps; | |
| 513 #else | |
| 514 handle->fops = &dfPackFileOps; | |
| 515 #endif | |
| 516 | |
| 517 #else | |
| 518 handle->fops = &dfStdioFileOps; | |
| 519 #endif | |
| 520 } | |
| 521 | |
| 522 // Check if the data is preloaded | |
| 523 if (handle->flags & DMF_LOADED) | |
| 524 { | |
| 525 dmres_ref(handle); | |
| 526 return handle; | |
| 527 } | |
| 528 | |
| 529 // Check if we want to preload .. | |
| 530 ret = DMERR_INIT_FAIL; | |
| 531 if ((handle->flags & DMF_PRELOAD) && | |
| 532 handle->fops->preload != NULL) | |
| 533 ret = handle->fops->preload(handle); | |
| 534 else | |
| 535 { | |
| 536 if (handle->fops->fopen != NULL) | |
| 537 ret = handle->fops->fopen(handle); | |
| 538 else | |
| 539 if (handle->fops->preload != NULL) | |
| 540 ret = handle->fops->preload(handle); | |
| 541 } | |
| 542 | |
| 543 if (ret == DMERR_OK) | |
| 544 return handle; | |
| 545 | |
| 546 dmres_ref(handle); | |
| 547 return NULL; | |
| 548 } | |
| 549 | |
| 550 | |
| 551 DMResource * dmf_open_memio(const char *filename, Uint8 *buf, size_t len) | |
| 552 { | |
| 553 DMResource *handle; | |
| 554 | |
| 555 // Check master directory for resource | |
| 556 if ((handle = dmres_find(filename)) == NULL) | |
| 557 { | |
| 558 // Hmm.. does not exist? Fall back to a stdio file | |
| 559 handle = dmres_new(filename, DMF_LOADED, len); | |
| 560 if (handle == NULL) | |
| 561 return NULL; | |
| 562 | |
| 563 handle->fops = &dfMemIOFileOps; | |
| 564 handle->data = buf; | |
| 565 dmres_insert(handle); | |
| 566 } | |
| 567 | |
| 568 // Increase refcount | |
| 569 dmres_ref(handle); | |
| 570 | |
| 571 return handle; | |
| 572 } | |
| 573 | |
| 574 | |
| 575 #ifdef DMRES_STDIO | |
| 576 DMResource * dmf_create_stdio(const char *filename) | |
| 577 { | |
| 578 DMResource *handle = dmres_new(filename, 0, 0); | |
| 579 if (handle == NULL) | |
| 580 return NULL; | |
| 581 | |
| 582 handle->fops = &dfStdioFileOps; | |
| 583 | |
| 584 handle->fh = fopen(filename, "rb"); | |
| 585 handle->error = dmGetErrno(); | |
| 586 | |
| 587 if (handle->fh != NULL) | |
| 588 { | |
| 589 dmres_ref(handle); | |
| 590 return handle; | |
| 591 } | |
| 592 else | |
| 593 { | |
| 594 dmres_free(handle); | |
| 595 return NULL; | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 | |
| 600 DMResource * dmf_create_stdio_stream(FILE *fh) | |
| 601 { | |
| 602 DMResource *handle = dmres_new("", 0, 0); | |
| 603 if (handle == NULL) | |
| 604 return NULL; | |
| 605 | |
| 606 handle->fops = &dfStdioFHOps; | |
| 607 handle->fh = fh; | |
| 608 dmres_ref(handle); | |
| 609 return handle; | |
| 610 } | |
| 611 #endif | |
| 612 | |
| 613 | |
| 614 void dmf_close(DMResource * f) | |
| 615 { | |
| 616 if (f == NULL) | |
| 617 return; | |
| 618 | |
| 619 if (f->fops->fclose != NULL) | |
| 620 f->fops->fclose(f); | |
| 621 | |
| 622 dmres_unref(f); | |
| 623 } | |
| 624 | |
| 625 | |
| 626 int dmferror(DMResource * f) | |
| 627 { | |
| 628 f->atime = time(NULL); | |
| 629 return f->fops->ferror(f); | |
| 630 } | |
| 631 | |
| 632 int dmfseek(DMResource * f, off_t offset, int whence) | |
| 633 { | |
| 634 f->atime = time(NULL); | |
| 635 return f->fops->fseek(f, offset, whence); | |
| 636 } | |
| 637 | |
| 638 off_t dmfsize(DMResource * f) | |
| 639 { | |
| 640 f->atime = time(NULL); | |
| 641 return f->fops->fsize(f); | |
| 642 } | |
| 643 | |
| 644 off_t dmftell(DMResource * f) | |
| 645 { | |
| 646 f->atime = time(NULL); | |
| 647 return f->fops->ftell(f); | |
| 648 } | |
| 649 | |
| 650 BOOL dmfeof(DMResource * f) | |
| 651 { | |
| 652 f->atime = time(NULL); | |
| 653 return f->fops->feof(f); | |
| 654 } | |
| 655 | |
| 656 int dmfgetc(DMResource * f) | |
| 657 { | |
| 658 f->atime = time(NULL); | |
| 659 return f->fops->fgetc(f); | |
| 660 } | |
| 661 | |
| 662 size_t dmfread(void *ptr, size_t size, size_t nmemb, DMResource * f) | |
| 663 { | |
| 664 f->atime = time(NULL); | |
| 665 return f->fops->fread(ptr, size, nmemb, f); | |
| 666 } | |
| 667 | |
| 668 | |
| 669 int dmres_ref(DMResource *res) | |
| 670 { | |
| 671 DMRES_LOCK(); | |
| 672 res->atime = time(NULL); | |
| 673 res->refcount++; | |
| 674 DMRES_UNLOCK(); | |
| 675 | |
| 676 return res->refcount; | |
| 677 } | |
| 678 | |
| 679 | |
| 680 int dmres_unref(DMResource *res) | |
| 681 { | |
| 682 DMRES_LOCK(); | |
| 683 res->refcount--; | |
| 684 DMRES_UNLOCK(); | |
| 685 | |
| 686 return res->refcount; | |
| 687 } | |
| 688 | |
| 689 | |
| 690 int dmres_load_resfile(const char *filename) | |
| 691 { | |
| 692 int ret; | |
| 693 char line[256]; | |
| 694 FILE *f = fopen(filename, "r"); | |
| 695 if (f == NULL) | |
| 696 return DMERR_FOPEN; | |
| 697 | |
| 698 DMRES_LOCK(); | |
| 699 | |
| 700 while (fgets(line, sizeof(line) - 1, f) != NULL) | |
| 701 { | |
| 702 int fnstart, fsep; | |
| 703 for (fnstart = 0; isspace(line[fnstart]); fnstart++); | |
| 704 for (fsep = fnstart; line[fsep] && line[fsep] != '|'; fsep++); | |
| 705 if (line[fsep] == '|') | |
| 706 { | |
| 707 int flags, i; | |
| 708 for (i = fsep - 1; i > 0 && isspace(line[i]); i--) | |
| 709 line[i] = 0; | |
| 710 | |
| 711 for (i = fsep; isspace(line[i]); i++); | |
| 712 | |
| 713 if (sscanf(&line[i], "%x", &flags) == 1 && | |
| 714 strlen(&line[fnstart]) > 0) | |
| 715 { | |
| 716 | |
| 717 } | |
| 718 } | |
| 719 } | |
| 720 | |
| 721 DMRES_UNLOCK(); | |
| 722 fclose(f); | |
| 723 return ret; | |
| 724 } | |
| 725 | |
| 726 | |
| 727 int dmres_write_resfile(const char *filename) | |
| 728 { | |
| 729 int ret; | |
| 730 DMResource *node; | |
| 731 FILE *f = fopen(filename, "w"); | |
| 732 if (f == NULL) | |
| 733 return DMERR_FOPEN; | |
| 734 | |
| 735 DMRES_LOCK(); | |
| 736 | |
| 737 for (node = dfResources; node != NULL; node = node->next) | |
| 738 { | |
| 739 if (fprintf(f, "%s|%08x\n", node->filename, node->flags) < 0) | |
| 740 { | |
| 741 ret = DMERR_FWRITE; | |
| 742 goto error; | |
| 743 } | |
| 744 } | |
| 745 | |
| 746 error: | |
| 747 DMRES_UNLOCK(); | |
| 748 fclose(f); | |
| 749 return ret; | |
| 750 } | |
| 751 | |
| 752 | |
| 753 /* Resources subsystem initialization and shutdown routines | |
| 754 */ | |
| 755 int dmres_init(const char *filename, const char *path, int flags) | |
| 756 { | |
| 757 // Check if we are already initialized | |
| 758 if (dfResInitialized) | |
| 759 return DMERR_ALREADY_INIT; | |
| 760 | |
| 761 dfResFlags = flags; | |
| 762 dfResPath = dm_strdup((path != NULL) ? path : DMRES_DATA_PATH); | |
| 763 dfResourcesMutex = dmCreateMutex(); | |
| 764 | |
| 765 if (flags & DRF_USE_PACK) | |
| 766 { | |
| 767 #ifdef DMRES_PACKFS | |
| 768 int ret; | |
| 769 DMPackEntry *node; | |
| 770 | |
| 771 dfResPackFilename = dm_strdup((filename != NULL) ? filename : DMRES_DATA_PACK); | |
| 772 | |
| 773 // Initialize PACK, open as read-only | |
| 774 ret = dm_pack_open(dfResPackFilename, &dfResPackFile, TRUE); | |
| 775 if (ret != DMERR_OK) | |
| 776 { | |
| 777 dmError("Error opening PACK file '%s', #%i: %s\n", | |
| 778 dfResPackFilename, ret, dmErrorStr(ret)); | |
| 779 | |
| 780 return DMERR_INIT_FAIL; | |
| 781 } | |
| 782 | |
| 783 // Initialize resources from a PACK file | |
| 784 for (node = dfResPackFile->entries; node != NULL; node = node->next) | |
| 785 { | |
|
4
e0fc7863d024
Mask out bits from resFlags that should not be there after initialization.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
786 DMResource *res = dmres_new(node->filename, node->resFlags & DMF_MASK, node->size); |
| 0 | 787 if (res == NULL) |
| 788 { | |
| 789 dmError("Could not allocate memory for resource node '%s' [0x%08x], %d.\n", | |
| 790 node->filename, node->resFlags, node->size); | |
| 791 return DMERR_INIT_FAIL; | |
| 792 } | |
| 793 | |
| 794 dmres_insert(res); | |
| 795 } | |
| 796 | |
| 797 #else | |
| 798 // PACK not compiled in, FAIL! | |
| 799 return DMERR_INIT_FAIL; | |
| 800 #endif | |
| 801 } | |
| 802 else | |
| 803 { | |
| 804 // Initialize resources from a resource directory | |
| 805 char *resFilename = dm_strdup_printf("%s%s", dfResPath, DMRES_RES_FILE); | |
| 806 int ret = dmres_load_resfile(resFilename); | |
| 807 dmFree(resFilename); | |
| 808 | |
| 809 if (ret != DMERR_OK) | |
| 810 return DMERR_INIT_FAIL; | |
| 811 } | |
| 812 | |
| 813 | |
| 814 // Initialization complete | |
| 815 dfResInitialized = TRUE; | |
| 816 return DMERR_OK; | |
| 817 } | |
| 818 | |
| 819 | |
| 820 void dmres_close(void) | |
| 821 { | |
| 822 DMResource *node; | |
| 823 DMRES_LOCK(); | |
| 824 | |
| 825 if (!dfResInitialized) | |
| 826 return; | |
| 827 | |
| 828 // Shutdown possible subsystems | |
| 829 #ifdef DMRES_PACKFS | |
| 830 if (dfResFlags & DRF_USE_PACK) | |
| 831 { | |
| 832 int res = dm_pack_close(dfResPackFile); | |
| 833 if (res != DMERR_OK) | |
| 834 { | |
| 835 dmError("Error closing PACK, #%i: %s\n", | |
| 836 res, dmErrorStr(res)); | |
| 837 } | |
| 838 | |
| 839 dmFree(dfResPackFilename); | |
| 840 } | |
| 841 #endif | |
| 842 | |
| 843 // Free resource entries | |
| 844 node = dfResources; | |
| 845 while (node != NULL) | |
| 846 { | |
| 847 DMResource *next = node->next; | |
| 848 dmres_free(node); | |
| 849 node = next; | |
| 850 } | |
| 851 | |
| 852 // Etc. | |
| 853 dmFree(dfResPath); | |
| 854 DMRES_UNLOCK(); | |
| 855 dmDestroyMutex(dfResourcesMutex); | |
| 856 dfResInitialized = FALSE; | |
| 857 } | |
| 858 | |
| 859 | |
| 860 BOOL dmres_preload(int *loaded, int *total) | |
| 861 { | |
| 862 static DMResource *dfPreload = NULL; | |
| 863 | |
| 864 DMRES_LOCK(); | |
| 865 | |
| 866 if (dfPreload == NULL) | |
| 867 { | |
| 868 DMResource *node; | |
| 869 dfPreload = dfResources; | |
| 870 *loaded = 0; | |
| 871 *total = 0; | |
| 872 for (node = dfResources; node != NULL; node = node->next) | |
| 873 { | |
| 874 if (node->flags & DMF_PRELOAD) | |
| 875 (*total)++; | |
| 876 } | |
| 877 } | |
| 878 | |
| 879 if (dfPreload != NULL) | |
| 880 { | |
|
4
e0fc7863d024
Mask out bits from resFlags that should not be there after initialization.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
881 if ((dfPreload->flags & DMF_PRELOAD) && (dfPreload->flags & DMF_LOADED) == 0) |
| 0 | 882 { |
| 883 (*loaded)++; | |
| 884 } | |
| 885 | |
| 886 dfPreload = dfPreload->next; | |
| 887 } | |
| 888 | |
| 889 DMRES_UNLOCK(); | |
| 890 | |
| 891 return (*total) == (*loaded); | |
| 892 } | |
| 893 | |
| 894 | |
| 895 void dmres_prune(int agems, int flags) | |
| 896 { | |
| 897 DMResource *node, *next; | |
| 898 int currtime = time(NULL); | |
| 899 DMRES_LOCK(); | |
| 900 | |
| 901 node = dfResources; | |
| 902 while (node != NULL) | |
| 903 { | |
| 904 next = node->next; | |
| 905 // Check if node has refcount of 0 and is | |
| 906 // not marked as persistent resource | |
| 907 if (node->refcount == 0 && (node->flags & DMF_PERSIST) == 0) | |
| 908 { | |
| 909 // Check if we match either one of atime or mtime | |
| 910 if (((flags & DMPRUNE_ATIME) && | |
| 911 currtime - node->atime >= agems) || | |
| 912 ((flags & DMPRUNE_MTIME) && | |
| 913 currtime - node->mtime >= agems)) | |
| 914 { | |
| 915 dmres_delete(node); | |
| 916 } | |
| 917 } | |
| 918 node = next; | |
| 919 } | |
| 920 | |
| 921 DMRES_UNLOCK(); | |
| 922 } | |
| 923 | |
| 924 | |
| 925 /* Helper resource access routines | |
| 926 */ | |
| 927 int dmf_read_str(DMResource *f, Uint8 *s, size_t l) | |
| 928 { | |
| 929 return dmfread(s, sizeof(Uint8), l, f) == l; | |
| 930 } | |
| 931 | |
| 932 | |
| 933 #define DM_DEFINE_FUNC(xname, xtype, xmacro) \ | |
| 934 BOOL dmf_read_ ## xname (DMResource *f, xtype *v) { \ | |
| 935 xtype result; \ | |
| 936 if (dmfread(&result, sizeof( xtype ), 1, f) != 1) \ | |
| 937 return FALSE; \ | |
| 938 *v = DM_ ## xmacro ## _TO_NATIVE (result); \ | |
| 939 return TRUE; \ | |
| 940 } | |
| 941 | |
| 942 DM_DEFINE_FUNC(le16, Uint16, LE16) | |
| 943 DM_DEFINE_FUNC(le32, Uint32, LE32) | |
| 944 | |
| 945 DM_DEFINE_FUNC(be16, Uint16, BE16) | |
| 946 DM_DEFINE_FUNC(be32, Uint32, BE32) | |
| 947 | |
| 948 #ifdef DM_HAVE_64BIT | |
| 949 DM_DEFINE_FUNC(le64, Uint64, LE64) | |
| 950 DM_DEFINE_FUNC(be64, Uint64, BE64) | |
| 951 #endif |