Mercurial > hg > dmlib
annotate dmres.c @ 26:2f463a59d732
Implement rudimentary resource system.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sat, 29 Sep 2012 05:29:38 +0300 |
| parents | e0fc7863d024 |
| children | 21c14afbf63d |
| 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 { | |
|
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51 if (res->rdata != NULL && |
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52 res->rops != NULL && |
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53 res->rops->free != NULL) |
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54 { |
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55 res->rops->free(res); |
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56 res->rdata = NULL; |
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57 } |
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58 |
| 0 | 59 dmFree(res->filename); |
| 60 dmFree(res->data); | |
| 61 dmFree(res); | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 | |
| 66 void dmres_insert(DMResource * node) | |
| 67 { | |
| 68 if (dfResources != NULL) | |
| 69 { | |
| 70 node->prev = dfResources->prev; | |
| 71 dfResources->prev->next = node; | |
| 72 dfResources->prev = node; | |
| 73 } | |
| 74 else | |
| 75 { | |
| 76 dfResources = node->prev = node; | |
| 77 } | |
| 78 | |
| 79 node->next = NULL; | |
| 80 } | |
| 81 | |
| 82 | |
| 83 void dmres_delete(DMResource * node) | |
| 84 { | |
| 85 if (node->prev) | |
| 86 node->prev->next = node->next; | |
| 87 | |
| 88 if (node->next) | |
| 89 node->next->prev = node->prev; | |
| 90 else | |
| 91 dfResources->prev = node->prev; | |
| 92 | |
| 93 node->prev = node->next = NULL; | |
| 94 } | |
| 95 | |
| 96 | |
| 97 DMResource * dmres_find(const char *filename) | |
| 98 { | |
| 99 DMResource *node, *found = NULL; | |
| 100 | |
| 101 DMRES_LOCK(); | |
| 102 | |
| 103 for (node = dfResources; node != NULL; node = node->next) | |
| 104 { | |
| 105 if (strcmp(node->filename, filename) == 0) | |
| 106 { | |
| 107 found = node; | |
| 108 break; | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 DMRES_UNLOCK(); | |
| 113 | |
| 114 return found; | |
| 115 } | |
| 116 | |
| 117 | |
| 118 #ifdef DMRES_STDIO | |
| 119 /* Basic stdio file routines | |
| 120 */ | |
| 121 static int dm_stdio_fopen(DMResource *handle) | |
| 122 { | |
| 123 char *rfilename = dm_strdup_printf("%s%s", DMRES_DATA_PATH, handle->filename); | |
| 124 if (rfilename == NULL) | |
| 125 return DMERR_MALLOC; | |
| 126 | |
| 127 handle->fh = fopen(rfilename, "rb"); | |
| 128 dmFree(rfilename); | |
| 129 | |
| 130 handle->error = dmGetErrno(); | |
| 131 return (handle->fh != NULL) ? DMERR_OK : DMERR_FOPEN; | |
| 132 } | |
| 133 | |
| 134 | |
| 135 static void dm_stdio_fclose(DMResource * f) | |
| 136 { | |
| 137 if (f->fh != NULL) | |
| 138 { | |
| 139 fclose(f->fh); | |
| 140 f->fh = NULL; | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 | |
| 145 static int dm_stdio_ferror(DMResource * f) | |
| 146 { | |
| 147 return f->error; | |
| 148 } | |
| 149 | |
| 150 | |
| 151 static int dm_stdio_fseek(DMResource *f, const off_t pos, const int whence) | |
| 152 { | |
| 153 int ret = fseek(f->fh, pos, whence); | |
| 154 f->error = dmGetErrno(); | |
| 155 return ret; | |
| 156 } | |
| 157 | |
| 158 | |
| 159 static off_t dm_stdio_fsize(DMResource *f) | |
| 160 { | |
| 161 off_t savePos, fileSize; | |
| 162 | |
| 163 // Check if the size is cached | |
| 164 if (f->dataSize != 0) | |
| 165 return f->dataSize; | |
| 166 | |
| 167 // Get file size | |
| 168 savePos = ftell(f->fh); | |
| 169 if (fseek(f->fh, 0L, SEEK_END) != 0) | |
| 170 { | |
| 171 f->error = dmGetErrno(); | |
| 172 return -1; | |
| 173 } | |
| 174 | |
| 175 fileSize = ftell(f->fh); | |
| 176 if (fseek(f->fh, savePos, SEEK_SET) != 0) | |
| 177 { | |
| 178 f->error = dmGetErrno(); | |
| 179 return -1; | |
| 180 } | |
| 181 | |
| 182 f->dataSize = fileSize; | |
| 183 return fileSize; | |
| 184 } | |
| 185 | |
| 186 | |
| 187 static off_t dm_stdio_ftell(DMResource * f) | |
| 188 { | |
| 189 return ftell(f->fh); | |
| 190 } | |
| 191 | |
| 192 | |
| 193 static BOOL dm_stdio_feof(DMResource * f) | |
| 194 { | |
| 195 return feof(f->fh); | |
| 196 } | |
| 197 | |
| 198 | |
| 199 static int dm_stdio_fgetc(DMResource * f) | |
| 200 { | |
| 201 int ret = fgetc(f->fh); | |
| 202 f->error = dmGetErrno(); | |
| 203 return ret; | |
| 204 } | |
| 205 | |
| 206 | |
| 207 static size_t dm_stdio_fread(void *ptr, size_t size, size_t nmemb, DMResource * f) | |
| 208 { | |
| 209 size_t ret = fread(ptr, size, nmemb, f->fh); | |
| 210 f->error = dmGetErrno(); | |
| 211 return ret; | |
| 212 } | |
| 213 | |
| 214 | |
| 215 static int dm_stdio_preload(DMResource *handle) | |
| 216 { | |
| 217 int ret = dm_stdio_fopen(handle); | |
| 218 if (ret != DMERR_OK) | |
| 219 return ret; | |
| 220 | |
| 221 dm_stdio_fsize(handle); | |
| 222 | |
| 223 handle->data = dmMalloc(handle->dataSize); | |
| 224 if (handle->data == NULL) | |
| 225 return DMERR_MALLOC; | |
| 226 | |
| 227 if (dm_stdio_fread(handle->data, sizeof(Uint8), handle->dataSize, handle) != handle->dataSize) | |
| 228 return DMERR_FREAD; | |
| 229 | |
| 230 return DMERR_OK; | |
| 231 } | |
| 232 | |
| 233 | |
| 234 DMResourceOps dfStdioFileOps = | |
| 235 { | |
| 236 dm_stdio_ferror, | |
| 237 dm_stdio_fseek, | |
| 238 dm_stdio_fsize, | |
| 239 dm_stdio_ftell, | |
| 240 dm_stdio_feof, | |
| 241 dm_stdio_fgetc, | |
| 242 dm_stdio_fread, | |
| 243 | |
| 244 dm_stdio_fopen, | |
| 245 dm_stdio_fclose, | |
| 246 dm_stdio_preload | |
| 247 }; | |
| 248 | |
| 249 DMResourceOps dfStdioFHOps = | |
| 250 { | |
| 251 dm_stdio_ferror, | |
| 252 dm_stdio_fseek, | |
| 253 dm_stdio_fsize, | |
| 254 dm_stdio_ftell, | |
| 255 dm_stdio_feof, | |
| 256 dm_stdio_fgetc, | |
| 257 dm_stdio_fread, | |
| 258 | |
| 259 NULL, | |
| 260 NULL, | |
| 261 NULL | |
| 262 }; | |
| 263 #endif | |
| 264 | |
| 265 | |
| 266 // Some mingw/windows headers define these as macros, which is bad for us | |
| 267 #ifdef __WIN32 | |
| 268 #undef ferror | |
| 269 #undef feof | |
| 270 #endif | |
| 271 | |
| 272 | |
| 273 /* | |
| 274 * PACK file routines | |
| 275 */ | |
| 276 #ifdef DMRES_PACKFS | |
| 277 static int dm_pack_preload(DMResource *handle) | |
| 278 { | |
| 279 DMPackEntry *node; | |
| 280 int res = DMERR_OK, cres, cdataLeft; | |
| 281 z_stream cstream; | |
| 282 Uint8 * cbuffer = NULL; | |
| 283 | |
| 284 // Search PACK nodelist for file | |
| 285 if ((node = dm_pack_find(dfResPackFile->entries, handle->filename)) == NULL) | |
| 286 { | |
| 287 dmError("Entry '%s' not found in PACK file.\n", handle->filename); | |
| 288 res = DMERR_NOT_FOUND; | |
| 289 goto error; | |
| 290 } | |
| 291 | |
| 292 // Seek to entry | |
| 293 if (fseek(dfResPackFile->file, node->offset, SEEK_SET) == -1) | |
| 294 { | |
| 295 dmError("Could not seek node position in PACK file.\n"); | |
| 296 res = DMERR_FSEEK; | |
| 297 goto error; | |
| 298 } | |
| 299 | |
| 300 // Allocate a structures and buffers | |
| 301 cbuffer = (Uint8 *) dmMalloc(DPACK_TMPSIZE); | |
| 302 if (cbuffer == NULL) | |
| 303 { | |
| 304 res = DMERR_MALLOC; | |
| 305 goto error; | |
| 306 } | |
| 307 | |
| 308 // Initialize fields | |
| 309 handle->dataOffset = 0; | |
| 310 handle->dataSize = node->size; | |
| 311 handle->data = (Uint8 *) dmMalloc(node->size); | |
| 312 if (handle->data == NULL) | |
| 313 { | |
| 314 res = DMERR_MALLOC; | |
| 315 goto error; | |
| 316 } | |
| 317 | |
| 318 // Initialize decompression | |
| 319 cstream.zalloc = (alloc_func) Z_NULL; | |
| 320 cstream.zfree = (free_func) Z_NULL; | |
| 321 cstream.opaque = (voidpf) Z_NULL; | |
| 322 cstream.next_out = handle->data; | |
| 323 cstream.avail_out = handle->dataSize; | |
| 324 cdataLeft = node->length; | |
| 325 cres = inflateInit(&(cstream)); | |
| 326 if (cres != Z_OK) | |
| 327 { | |
| 328 dmError("Could not initialize zlib stream inflation.\n"); | |
| 329 res = DMERR_INIT_FAIL; | |
| 330 goto error; | |
| 331 } | |
| 332 | |
| 333 // Uncompress the data | |
| 334 while (cdataLeft > 0 && | |
| 335 cstream.avail_out > 0 && cres == Z_OK) | |
| 336 { | |
| 337 cstream.avail_in = fread( | |
| 338 cbuffer, sizeof(Uint8), | |
| 339 (cdataLeft >= DPACK_TMPSIZE) ? DPACK_TMPSIZE : cdataLeft, | |
| 340 dfResPackFile->file); | |
| 341 | |
| 342 cdataLeft -= cstream.avail_in; | |
| 343 cstream.next_in = cbuffer; | |
| 344 cres = inflate(&cstream, Z_FULL_FLUSH); | |
| 345 } | |
| 346 | |
| 347 // Cleanup | |
| 348 inflateEnd(&(cstream)); | |
| 349 | |
| 350 error: | |
| 351 dmFree(cbuffer); | |
| 352 return res; | |
| 353 } | |
| 354 #endif | |
| 355 | |
| 356 | |
| 357 static void dm_mem_fclose(DMResource * f) | |
| 358 { | |
| 359 f->dataSize = 0; | |
| 360 f->dataOffset = 0; | |
| 361 dmFree(f->data); | |
| 362 f->data = NULL; | |
| 363 } | |
| 364 | |
| 365 | |
| 366 static int dm_mem_ferror(DMResource * f) | |
| 367 { | |
| 368 return f->error; | |
| 369 } | |
| 370 | |
| 371 | |
| 372 static int dm_mem_fseek(DMResource * f, const off_t offset, const int whence) | |
| 373 { | |
| 374 off_t newPos; | |
| 375 | |
| 376 // Calculate the new position | |
| 377 switch (whence) | |
| 378 { | |
| 379 case SEEK_SET: | |
| 380 newPos = offset; | |
| 381 break; | |
| 382 | |
| 383 case SEEK_CUR: | |
| 384 newPos = f->dataOffset + offset; | |
| 385 break; | |
| 386 | |
| 387 case SEEK_END: | |
| 388 newPos = f->dataSize + offset; | |
| 389 break; | |
| 390 | |
| 391 default: | |
| 392 return -1; | |
| 393 } | |
| 394 | |
| 395 // Set the new position | |
| 396 f->dataOffset = newPos; | |
| 397 | |
| 398 // Check the new position | |
| 399 if (newPos < 0 && (size_t) newPos >= f->dataSize) | |
| 400 return -1; | |
| 401 | |
| 402 return 0; | |
| 403 } | |
| 404 | |
| 405 | |
| 406 static off_t dm_mem_fsize(DMResource * f) | |
| 407 { | |
| 408 return f->dataSize; | |
| 409 } | |
| 410 | |
| 411 | |
| 412 static off_t dm_mem_ftell(DMResource * f) | |
| 413 { | |
| 414 return f->dataOffset; | |
| 415 } | |
| 416 | |
| 417 | |
| 418 static BOOL dm_mem_feof(DMResource * f) | |
| 419 { | |
| 420 // Check for EOF | |
| 421 if ((size_t) f->dataOffset <= f->dataSize) | |
| 422 return FALSE; | |
| 423 else | |
| 424 return TRUE; | |
| 425 } | |
| 426 | |
| 427 | |
| 428 static int dm_mem_fgetc(DMResource * f) | |
| 429 { | |
| 430 // Check for EOF | |
| 431 if ((size_t) f->dataOffset < f->dataSize) | |
| 432 return (int) f->data[f->dataOffset++]; | |
| 433 else | |
| 434 return EOF; | |
| 435 } | |
| 436 | |
| 437 | |
| 438 static size_t dm_mem_fread(void *buf, size_t size, size_t nmemb, DMResource * f) | |
| 439 { | |
| 440 size_t length = (size * nmemb); | |
| 441 | |
| 442 // Check if we can read the whole chunk | |
| 443 if (((size_t) f->dataOffset + length) >= f->dataSize) | |
| 444 { | |
| 445 nmemb = (f->dataSize - f->dataOffset) / size; | |
| 446 length = size * nmemb; | |
| 447 } | |
| 448 | |
| 449 memcpy(buf, f->data + f->dataOffset, length); | |
| 450 f->dataOffset += length; | |
| 451 return nmemb; | |
| 452 } | |
| 453 | |
| 454 | |
| 455 DMResourceOps dfPackFileOps = | |
| 456 { | |
| 457 dm_mem_ferror, | |
| 458 dm_mem_fseek, | |
| 459 dm_mem_fsize, | |
| 460 dm_mem_ftell, | |
| 461 dm_mem_feof, | |
| 462 dm_mem_fgetc, | |
| 463 dm_mem_fread, | |
| 464 | |
| 465 NULL, | |
| 466 dm_mem_fclose, | |
| 467 dm_pack_preload | |
| 468 }; | |
| 469 | |
| 470 | |
| 471 DMResourceOps dfMemIOFileOps = | |
| 472 { | |
| 473 dm_mem_ferror, | |
| 474 dm_mem_fseek, | |
| 475 dm_mem_fsize, | |
| 476 dm_mem_ftell, | |
| 477 dm_mem_feof, | |
| 478 dm_mem_fgetc, | |
| 479 dm_mem_fread, | |
| 480 | |
| 481 NULL, | |
| 482 NULL, | |
| 483 NULL | |
| 484 }; | |
| 485 | |
| 486 | |
| 487 /* FS file handling functions. These functions call the actual | |
| 488 * functions depending on where the file is located. | |
| 489 */ | |
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parents:
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490 static void dmf_init_fops(DMResource *handle) |
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parents:
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491 { |
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492 // Check fops |
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493 if (handle->fops == NULL) |
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494 { |
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495 #ifdef DMRES_PACKFS |
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496 if (dfResFlags & DRF_USE_PACK) |
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497 handle->fops = &dfPackFileOps; |
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498 #ifdef DMRES_STDIO |
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499 else |
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500 handle->fops = &dfStdioFileOps; |
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501 #else |
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502 handle->fops = &dfPackFileOps; |
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503 #endif |
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504 |
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505 #else |
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506 handle->fops = &dfStdioFileOps; |
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507 #endif |
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508 } |
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509 } |
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510 |
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511 |
| 0 | 512 DMResource *dmf_open(const char *filename) |
| 513 { | |
| 514 int ret; | |
| 515 DMResource *handle; | |
| 516 | |
| 517 // Check master directory for resource | |
| 518 if ((handle = dmres_find(filename)) == NULL) | |
| 519 { | |
| 520 #ifdef DMRES_STDIO | |
| 521 // Hmm.. does not exist? Fall back to a stdio file | |
| 522 handle = dmres_new(filename, 0, 0); | |
| 523 if (handle == NULL) | |
| 524 return NULL; | |
| 525 | |
| 526 handle->fops = &dfStdioFileOps; | |
| 527 dmres_insert(handle); | |
| 528 #else | |
| 529 // Stdio not enabled, fail | |
| 530 return NULL; | |
| 531 #endif | |
| 532 } | |
| 533 | |
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534 dmf_init_fops(handle); |
| 0 | 535 |
| 536 // Check if the data is preloaded | |
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537 if (handle->flags & DMF_LOADED_RAW) |
| 0 | 538 { |
| 539 dmres_ref(handle); | |
| 540 return handle; | |
| 541 } | |
| 542 | |
| 543 // Check if we want to preload .. | |
| 544 ret = DMERR_INIT_FAIL; | |
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545 if (((handle->flags & DMF_PRELOAD_RAW) || (dfResFlags & DRF_PRELOAD_ALL)) && |
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546 (handle->flags & DMF_LOADED_RAW) == 0 && |
| 0 | 547 handle->fops->preload != NULL) |
| 548 ret = handle->fops->preload(handle); | |
| 549 else | |
| 550 { | |
| 551 if (handle->fops->fopen != NULL) | |
| 552 ret = handle->fops->fopen(handle); | |
| 553 else | |
| 554 if (handle->fops->preload != NULL) | |
| 555 ret = handle->fops->preload(handle); | |
| 556 } | |
|
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557 |
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558 if (((handle->flags & DMF_PRELOAD_RES) || (dfResFlags & DRF_PRELOAD_RES)) && |
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559 (handle->flags & DMF_LOADED_RES) == 0 && |
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560 handle->rops != NULL && |
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561 handle->rops->load != NULL) |
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562 ret = handle->rops->load(handle); |
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563 |
| 0 | 564 |
| 565 if (ret == DMERR_OK) | |
|
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566 { |
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567 dmres_ref(handle); |
| 0 | 568 return handle; |
|
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569 } |
| 0 | 570 |
| 571 return NULL; | |
| 572 } | |
| 573 | |
| 574 | |
| 575 DMResource * dmf_open_memio(const char *filename, Uint8 *buf, size_t len) | |
| 576 { | |
| 577 DMResource *handle; | |
| 578 | |
| 579 // Check master directory for resource | |
| 580 if ((handle = dmres_find(filename)) == NULL) | |
| 581 { | |
| 582 // Hmm.. does not exist? Fall back to a stdio file | |
|
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583 handle = dmres_new(filename, DMF_LOADED_RAW, len); |
| 0 | 584 if (handle == NULL) |
| 585 return NULL; | |
| 586 | |
| 587 handle->fops = &dfMemIOFileOps; | |
| 588 handle->data = buf; | |
| 589 dmres_insert(handle); | |
| 590 } | |
| 591 | |
| 592 // Increase refcount | |
| 593 dmres_ref(handle); | |
| 594 | |
| 595 return handle; | |
| 596 } | |
| 597 | |
| 598 | |
| 599 #ifdef DMRES_STDIO | |
| 600 DMResource * dmf_create_stdio(const char *filename) | |
| 601 { | |
| 602 DMResource *handle = dmres_new(filename, 0, 0); | |
| 603 if (handle == NULL) | |
| 604 return NULL; | |
| 605 | |
| 606 handle->fops = &dfStdioFileOps; | |
| 607 | |
| 608 handle->fh = fopen(filename, "rb"); | |
| 609 handle->error = dmGetErrno(); | |
| 610 | |
| 611 if (handle->fh != NULL) | |
| 612 { | |
| 613 dmres_ref(handle); | |
| 614 return handle; | |
| 615 } | |
| 616 else | |
| 617 { | |
| 618 dmres_free(handle); | |
| 619 return NULL; | |
| 620 } | |
| 621 } | |
| 622 | |
| 623 | |
| 624 DMResource * dmf_create_stdio_stream(FILE *fh) | |
| 625 { | |
| 626 DMResource *handle = dmres_new("", 0, 0); | |
| 627 if (handle == NULL) | |
| 628 return NULL; | |
| 629 | |
| 630 handle->fops = &dfStdioFHOps; | |
| 631 handle->fh = fh; | |
| 632 dmres_ref(handle); | |
| 633 return handle; | |
| 634 } | |
| 635 #endif | |
| 636 | |
| 637 | |
| 638 void dmf_close(DMResource * f) | |
| 639 { | |
| 640 if (f == NULL) | |
| 641 return; | |
| 642 | |
| 643 if (f->fops->fclose != NULL) | |
| 644 f->fops->fclose(f); | |
| 645 | |
| 646 dmres_unref(f); | |
| 647 } | |
| 648 | |
| 649 | |
| 650 int dmferror(DMResource * f) | |
| 651 { | |
| 652 f->atime = time(NULL); | |
| 653 return f->fops->ferror(f); | |
| 654 } | |
| 655 | |
| 656 int dmfseek(DMResource * f, off_t offset, int whence) | |
| 657 { | |
| 658 f->atime = time(NULL); | |
| 659 return f->fops->fseek(f, offset, whence); | |
| 660 } | |
| 661 | |
| 662 off_t dmfsize(DMResource * f) | |
| 663 { | |
| 664 f->atime = time(NULL); | |
| 665 return f->fops->fsize(f); | |
| 666 } | |
| 667 | |
| 668 off_t dmftell(DMResource * f) | |
| 669 { | |
| 670 f->atime = time(NULL); | |
| 671 return f->fops->ftell(f); | |
| 672 } | |
| 673 | |
| 674 BOOL dmfeof(DMResource * f) | |
| 675 { | |
| 676 f->atime = time(NULL); | |
| 677 return f->fops->feof(f); | |
| 678 } | |
| 679 | |
| 680 int dmfgetc(DMResource * f) | |
| 681 { | |
| 682 f->atime = time(NULL); | |
| 683 return f->fops->fgetc(f); | |
| 684 } | |
| 685 | |
| 686 size_t dmfread(void *ptr, size_t size, size_t nmemb, DMResource * f) | |
| 687 { | |
| 688 f->atime = time(NULL); | |
| 689 return f->fops->fread(ptr, size, nmemb, f); | |
| 690 } | |
| 691 | |
| 692 | |
| 693 int dmres_ref(DMResource *res) | |
| 694 { | |
| 695 DMRES_LOCK(); | |
| 696 res->atime = time(NULL); | |
| 697 res->refcount++; | |
| 698 DMRES_UNLOCK(); | |
| 699 | |
| 700 return res->refcount; | |
| 701 } | |
| 702 | |
| 703 | |
| 704 int dmres_unref(DMResource *res) | |
| 705 { | |
| 706 DMRES_LOCK(); | |
| 707 res->refcount--; | |
| 708 DMRES_UNLOCK(); | |
| 709 | |
| 710 return res->refcount; | |
| 711 } | |
| 712 | |
| 713 | |
| 714 int dmres_load_resfile(const char *filename) | |
| 715 { | |
| 716 int ret; | |
| 717 char line[256]; | |
| 718 FILE *f = fopen(filename, "r"); | |
| 719 if (f == NULL) | |
| 720 return DMERR_FOPEN; | |
| 721 | |
| 722 DMRES_LOCK(); | |
| 723 | |
| 724 while (fgets(line, sizeof(line) - 1, f) != NULL) | |
| 725 { | |
| 726 int fnstart, fsep; | |
| 727 for (fnstart = 0; isspace(line[fnstart]); fnstart++); | |
| 728 for (fsep = fnstart; line[fsep] && line[fsep] != '|'; fsep++); | |
| 729 if (line[fsep] == '|') | |
| 730 { | |
| 731 int flags, i; | |
| 732 for (i = fsep - 1; i > 0 && isspace(line[i]); i--) | |
| 733 line[i] = 0; | |
| 734 | |
| 735 for (i = fsep; isspace(line[i]); i++); | |
| 736 | |
| 737 if (sscanf(&line[i], "%x", &flags) == 1 && | |
| 738 strlen(&line[fnstart]) > 0) | |
| 739 { | |
| 740 | |
| 741 } | |
| 742 } | |
| 743 } | |
| 744 | |
| 745 DMRES_UNLOCK(); | |
| 746 fclose(f); | |
| 747 return ret; | |
| 748 } | |
| 749 | |
| 750 | |
| 751 int dmres_write_resfile(const char *filename) | |
| 752 { | |
| 753 int ret; | |
| 754 DMResource *node; | |
| 755 FILE *f = fopen(filename, "w"); | |
| 756 if (f == NULL) | |
| 757 return DMERR_FOPEN; | |
| 758 | |
| 759 DMRES_LOCK(); | |
| 760 | |
| 761 for (node = dfResources; node != NULL; node = node->next) | |
| 762 { | |
| 763 if (fprintf(f, "%s|%08x\n", node->filename, node->flags) < 0) | |
| 764 { | |
| 765 ret = DMERR_FWRITE; | |
| 766 goto error; | |
| 767 } | |
| 768 } | |
| 769 | |
| 770 error: | |
| 771 DMRES_UNLOCK(); | |
| 772 fclose(f); | |
| 773 return ret; | |
| 774 } | |
| 775 | |
| 776 | |
| 777 /* Resources subsystem initialization and shutdown routines | |
| 778 */ | |
|
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|
779 int dmres_init(const char *filename, const char *path, int flags, int (*classifier)(DMResource *)) |
| 0 | 780 { |
| 781 // Check if we are already initialized | |
| 782 if (dfResInitialized) | |
| 783 return DMERR_ALREADY_INIT; | |
| 784 | |
| 785 dfResFlags = flags; | |
| 786 dfResPath = dm_strdup((path != NULL) ? path : DMRES_DATA_PATH); | |
| 787 dfResourcesMutex = dmCreateMutex(); | |
| 788 | |
| 789 if (flags & DRF_USE_PACK) | |
| 790 { | |
| 791 #ifdef DMRES_PACKFS | |
| 792 int ret; | |
| 793 DMPackEntry *node; | |
| 794 | |
| 795 dfResPackFilename = dm_strdup((filename != NULL) ? filename : DMRES_DATA_PACK); | |
| 796 | |
| 797 // Initialize PACK, open as read-only | |
| 798 ret = dm_pack_open(dfResPackFilename, &dfResPackFile, TRUE); | |
| 799 if (ret != DMERR_OK) | |
| 800 { | |
| 801 dmError("Error opening PACK file '%s', #%i: %s\n", | |
| 802 dfResPackFilename, ret, dmErrorStr(ret)); | |
| 803 | |
| 804 return DMERR_INIT_FAIL; | |
| 805 } | |
| 806 | |
| 807 // Initialize resources from a PACK file | |
| 808 for (node = dfResPackFile->entries; node != NULL; node = node->next) | |
| 809 { | |
|
4
e0fc7863d024
Mask out bits from resFlags that should not be there after initialization.
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parents:
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diff
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|
810 DMResource *res = dmres_new(node->filename, node->resFlags & DMF_MASK, node->size); |
| 0 | 811 if (res == NULL) |
| 812 { | |
| 813 dmError("Could not allocate memory for resource node '%s' [0x%08x], %d.\n", | |
| 814 node->filename, node->resFlags, node->size); | |
| 815 return DMERR_INIT_FAIL; | |
| 816 } | |
| 817 | |
| 818 dmres_insert(res); | |
| 819 } | |
| 820 | |
| 821 #else | |
| 822 // PACK not compiled in, FAIL! | |
| 823 return DMERR_INIT_FAIL; | |
| 824 #endif | |
| 825 } | |
| 826 else | |
| 827 { | |
| 828 // Initialize resources from a resource directory | |
| 829 char *resFilename = dm_strdup_printf("%s%s", dfResPath, DMRES_RES_FILE); | |
| 830 int ret = dmres_load_resfile(resFilename); | |
| 831 dmFree(resFilename); | |
| 832 | |
| 833 if (ret != DMERR_OK) | |
| 834 return DMERR_INIT_FAIL; | |
| 835 } | |
| 836 | |
|
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
837 // Okay, classify resources |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
838 if (dfResources != NULL && classifier != NULL) |
|
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parents:
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diff
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|
839 { |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
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|
840 DMResource *node; |
|
2f463a59d732
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parents:
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diff
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|
841 for (node = dfResources; node != NULL; node = node->next) |
|
2f463a59d732
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diff
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|
842 { |
|
2f463a59d732
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4
diff
changeset
|
843 int ret = classifier(node); |
|
2f463a59d732
Implement rudimentary resource system.
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parents:
4
diff
changeset
|
844 if (ret != DMERR_OK) |
|
2f463a59d732
Implement rudimentary resource system.
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parents:
4
diff
changeset
|
845 return DMERR_INIT_FAIL; |
|
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Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
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diff
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|
846 } |
|
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parents:
4
diff
changeset
|
847 } |
| 0 | 848 |
| 849 // Initialization complete | |
| 850 dfResInitialized = TRUE; | |
| 851 return DMERR_OK; | |
| 852 } | |
| 853 | |
| 854 | |
| 855 void dmres_close(void) | |
| 856 { | |
| 857 DMResource *node; | |
| 858 DMRES_LOCK(); | |
| 859 | |
| 860 if (!dfResInitialized) | |
| 861 return; | |
| 862 | |
| 863 // Shutdown possible subsystems | |
| 864 #ifdef DMRES_PACKFS | |
| 865 if (dfResFlags & DRF_USE_PACK) | |
| 866 { | |
| 867 int res = dm_pack_close(dfResPackFile); | |
| 868 if (res != DMERR_OK) | |
| 869 { | |
| 870 dmError("Error closing PACK, #%i: %s\n", | |
| 871 res, dmErrorStr(res)); | |
| 872 } | |
| 873 | |
| 874 dmFree(dfResPackFilename); | |
| 875 } | |
| 876 #endif | |
| 877 | |
| 878 // Free resource entries | |
| 879 node = dfResources; | |
| 880 while (node != NULL) | |
| 881 { | |
| 882 DMResource *next = node->next; | |
| 883 dmres_free(node); | |
| 884 node = next; | |
| 885 } | |
| 886 | |
| 887 // Etc. | |
| 888 dmFree(dfResPath); | |
| 889 DMRES_UNLOCK(); | |
| 890 dmDestroyMutex(dfResourcesMutex); | |
| 891 dfResInitialized = FALSE; | |
| 892 } | |
| 893 | |
| 894 | |
|
26
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
895 int dmres_preload(BOOL start, int *loaded, int *total) |
| 0 | 896 { |
| 897 static DMResource *dfPreload = NULL; | |
|
26
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Implement rudimentary resource system.
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parents:
4
diff
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|
898 int ret = DMERR_OK; |
| 0 | 899 |
| 900 DMRES_LOCK(); | |
| 901 | |
|
26
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
902 // Initialize preloading |
|
2f463a59d732
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parents:
4
diff
changeset
|
903 if (dfPreload == NULL || start) |
| 0 | 904 { |
| 905 DMResource *node; | |
|
26
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Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
906 |
| 0 | 907 dfPreload = dfResources; |
| 908 *loaded = 0; | |
| 909 *total = 0; | |
|
26
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parents:
4
diff
changeset
|
910 |
|
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
911 // Calculate total number of resources to be preloaded |
| 0 | 912 for (node = dfResources; node != NULL; node = node->next) |
| 913 { | |
|
26
2f463a59d732
Implement rudimentary resource system.
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parents:
4
diff
changeset
|
914 if ((dfResFlags & (DRF_PRELOAD_ALL | DRF_PRELOAD_RES)) || |
|
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
915 (node->flags & (DMF_PRELOAD_RAW | DMF_PRELOAD_RES))) |
| 0 | 916 (*total)++; |
| 917 } | |
| 918 } | |
|
26
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
919 else |
| 0 | 920 if (dfPreload != NULL) |
| 921 { | |
|
26
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
922 // Check if the raw resource wants to be preloaded |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
923 if (((dfPreload->flags & DMF_PRELOAD_RAW) || (dfResFlags & DRF_PRELOAD_ALL)) && |
|
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
924 (dfPreload->flags & DMF_LOADED_RAW) == 0) |
| 0 | 925 { |
|
26
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
926 dmf_init_fops(dfPreload); |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
927 if (dfPreload->fops->preload != NULL) |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
928 { |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
929 ret = dfPreload->fops->preload(dfPreload); |
|
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
930 if (ret == DMERR_OK) |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
931 { |
|
2f463a59d732
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parents:
4
diff
changeset
|
932 dfPreload->flags |= DMF_LOADED_RAW; |
|
2f463a59d732
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parents:
4
diff
changeset
|
933 (*loaded)++; |
|
2f463a59d732
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parents:
4
diff
changeset
|
934 } |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
935 else |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
936 goto error; |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
937 } |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
938 } |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
939 |
|
2f463a59d732
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parents:
4
diff
changeset
|
940 // Preload actual resource, if requested |
|
2f463a59d732
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parents:
4
diff
changeset
|
941 if (((dfPreload->flags & DMF_PRELOAD_RES) || (dfResFlags & DRF_PRELOAD_RES)) && |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
942 (dfPreload->flags & DMF_LOADED_RES) == 0 && |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
943 dfPreload->rops != NULL && |
|
2f463a59d732
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Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
944 dfPreload->rops->load != NULL) |
|
2f463a59d732
Implement rudimentary resource system.
Matti Hamalainen <ccr@tnsp.org>
parents:
4
diff
changeset
|
945 { |
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946 dmf_init_fops(dfPreload); |
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947 ret = dfPreload->rops->load(dfPreload); |
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948 if (ret != DMERR_OK) |
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949 goto error; |
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950 |
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951 dfPreload->flags |= DMF_LOADED_RES; |
| 0 | 952 } |
| 953 | |
| 954 dfPreload = dfPreload->next; | |
| 955 } | |
| 956 | |
| 957 DMRES_UNLOCK(); | |
|
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958 return (dfPreload == NULL) ? DMERR_OK : DMERR_PROGRESS; |
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959 |
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960 error: |
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961 DMRES_UNLOCK(); |
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962 return ret; |
| 0 | 963 } |
| 964 | |
| 965 | |
| 966 void dmres_prune(int agems, int flags) | |
| 967 { | |
|
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968 DMResource *node; |
| 0 | 969 int currtime = time(NULL); |
| 970 DMRES_LOCK(); | |
| 971 | |
|
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972 for (node = dfResources; node != NULL; node = node->next) |
| 0 | 973 { |
| 974 // Check if node has refcount of 0 and is | |
| 975 // not marked as persistent resource | |
|
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976 if (node->refcount == 0 && |
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977 (node->flags & DMF_PERSIST) == 0 && |
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978 (node->flags & (DMF_LOADED_RES | DMF_LOADED_RAW))) |
| 0 | 979 { |
| 980 // Check if we match either one of atime or mtime | |
| 981 if (((flags & DMPRUNE_ATIME) && | |
| 982 currtime - node->atime >= agems) || | |
| 983 ((flags & DMPRUNE_MTIME) && | |
| 984 currtime - node->mtime >= agems)) | |
| 985 { | |
|
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986 // Check if resource data is loaded |
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987 if (node->rdata != NULL && |
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988 node->rops != NULL && |
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989 node->rops->free != NULL) |
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990 { |
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991 node->rops->free(node); |
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992 node->flags &= !DMF_LOADED_RES; |
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993 } |
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994 |
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995 // Check if raw data is loaded |
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996 if (node->flags & DMF_LOADED_RAW) |
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997 { |
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998 dmFree(node->data); |
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999 node->data = NULL; |
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1000 node->flags &= !DMF_LOADED_RAW; |
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1001 } |
| 0 | 1002 } |
| 1003 } | |
| 1004 } | |
| 1005 | |
| 1006 DMRES_UNLOCK(); | |
| 1007 } | |
| 1008 | |
| 1009 | |
| 1010 /* Helper resource access routines | |
| 1011 */ | |
| 1012 int dmf_read_str(DMResource *f, Uint8 *s, size_t l) | |
| 1013 { | |
| 1014 return dmfread(s, sizeof(Uint8), l, f) == l; | |
| 1015 } | |
| 1016 | |
| 1017 | |
| 1018 #define DM_DEFINE_FUNC(xname, xtype, xmacro) \ | |
| 1019 BOOL dmf_read_ ## xname (DMResource *f, xtype *v) { \ | |
| 1020 xtype result; \ | |
| 1021 if (dmfread(&result, sizeof( xtype ), 1, f) != 1) \ | |
| 1022 return FALSE; \ | |
| 1023 *v = DM_ ## xmacro ## _TO_NATIVE (result); \ | |
| 1024 return TRUE; \ | |
| 1025 } | |
| 1026 | |
| 1027 DM_DEFINE_FUNC(le16, Uint16, LE16) | |
| 1028 DM_DEFINE_FUNC(le32, Uint32, LE32) | |
| 1029 | |
| 1030 DM_DEFINE_FUNC(be16, Uint16, BE16) | |
| 1031 DM_DEFINE_FUNC(be32, Uint32, BE32) | |
| 1032 | |
| 1033 #ifdef DM_HAVE_64BIT | |
| 1034 DM_DEFINE_FUNC(le64, Uint64, LE64) | |
| 1035 DM_DEFINE_FUNC(be64, Uint64, BE64) | |
| 1036 #endif |