Mercurial > hg > dmlib
annotate dmres.c @ 406:a0160ffdf7e5
Use fseeko() and ftello() to ensure 64-bit off_t compatibility in stdio backend.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sat, 03 Nov 2012 01:54:00 +0200 |
| parents | 59045853853d |
| children | 3d9c044ec08d |
| 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 | |
|
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11 DMResource *dmres_new(DMResourceLib *lib, const char *filename, int flags, size_t size) |
| 0 | 12 { |
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13 DMResource *node = dmMalloc0(sizeof(DMResource)); |
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14 if (node == NULL) |
| 0 | 15 return NULL; |
| 16 | |
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17 node->lib = lib; |
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18 node->filename = dm_strdup(filename); |
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19 node->flags = flags; |
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20 node->dataSize = size; |
| 0 | 21 |
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22 return node; |
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23 } |
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24 |
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25 |
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26 void dmres_free_res_data(DMResource *node) |
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27 { |
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28 if (node->rdata != NULL && |
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29 node->rops != NULL && |
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30 node->rops->free != NULL) |
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31 { |
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32 node->rops->free(node); |
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33 } |
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34 |
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35 node->rdata = NULL; |
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36 node->flags &= !DMF_LOADED_RES; |
| 0 | 37 } |
| 38 | |
| 39 | |
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40 void dmres_free_raw_data(DMResource *node) |
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41 { |
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42 dmFree(node->data); |
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43 node->data = NULL; |
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44 node->flags &= !DMF_LOADED_RAW; |
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45 } |
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46 |
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47 |
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48 void dmres_purge_raw_data(DMResource *node) |
| 0 | 49 { |
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50 if ((node->flags & DMF_PRELOAD_RAW) == 0 && |
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51 (node->flags & DMF_LOADED_RAW) && |
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52 node->data != NULL) |
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53 dmres_free_raw_data(node); |
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54 } |
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55 |
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56 |
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57 void dmres_free(DMResource *node) |
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58 { |
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59 if (node != NULL) |
| 0 | 60 { |
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61 dmres_free_res_data(node); |
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62 dmres_free_raw_data(node); |
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63 dmFree(node->filename); |
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64 dmFree(node); |
| 0 | 65 } |
| 66 } | |
| 67 | |
| 68 | |
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69 void dmres_insert(DMResourceLib *lib, DMResource * node) |
| 0 | 70 { |
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71 if (lib == NULL) |
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72 return; |
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73 |
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74 node->lib = lib; |
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75 |
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76 if (lib->resources != NULL) |
| 0 | 77 { |
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78 node->prev = lib->resources->prev; |
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79 lib->resources->prev->next = node; |
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80 lib->resources->prev = node; |
| 0 | 81 } |
| 82 else | |
| 83 { | |
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84 lib->resources = node->prev = node; |
| 0 | 85 } |
| 86 | |
| 87 node->next = NULL; | |
| 88 } | |
| 89 | |
| 90 | |
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91 void dmres_delete(DMResourceLib *lib, DMResource * node) |
| 0 | 92 { |
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93 if (lib == NULL) |
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94 return; |
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95 |
| 0 | 96 if (node->prev) |
| 97 node->prev->next = node->next; | |
| 98 | |
| 99 if (node->next) | |
| 100 node->next->prev = node->prev; | |
| 101 else | |
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102 lib->resources->prev = node->prev; |
| 0 | 103 |
| 104 node->prev = node->next = NULL; | |
| 105 } | |
| 106 | |
| 107 | |
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108 DMResource * dmres_find(DMResourceLib *lib, const char *filename) |
| 0 | 109 { |
| 110 DMResource *node, *found = NULL; | |
| 111 | |
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112 if (lib == NULL) |
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113 return NULL; |
| 0 | 114 |
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115 dmMutexLock(lib->mutex); |
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116 |
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117 for (node = lib->resources; node != NULL; node = node->next) |
| 0 | 118 { |
| 119 if (strcmp(node->filename, filename) == 0) | |
| 120 { | |
| 121 found = node; | |
| 122 break; | |
| 123 } | |
| 124 } | |
| 125 | |
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126 dmMutexUnlock(lib->mutex); |
| 0 | 127 |
| 128 return found; | |
| 129 } | |
| 130 | |
| 131 | |
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132 #ifdef DM_USE_STDIO |
| 0 | 133 /* Basic stdio file routines |
| 134 */ | |
| 135 static int dm_stdio_fopen(DMResource *handle) | |
| 136 { | |
| 137 char *rfilename = dm_strdup_printf("%s%s", DMRES_DATA_PATH, handle->filename); | |
| 138 if (rfilename == NULL) | |
| 139 return DMERR_MALLOC; | |
| 140 | |
| 141 handle->fh = fopen(rfilename, "rb"); | |
| 142 dmFree(rfilename); | |
| 143 | |
| 144 handle->error = dmGetErrno(); | |
| 145 return (handle->fh != NULL) ? DMERR_OK : DMERR_FOPEN; | |
| 146 } | |
| 147 | |
| 148 | |
| 149 static void dm_stdio_fclose(DMResource * f) | |
| 150 { | |
| 151 if (f->fh != NULL) | |
| 152 { | |
| 153 fclose(f->fh); | |
| 154 f->fh = NULL; | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 | |
| 159 static int dm_stdio_ferror(DMResource * f) | |
| 160 { | |
| 161 return f->error; | |
| 162 } | |
| 163 | |
| 164 | |
| 165 static int dm_stdio_fseek(DMResource *f, const off_t pos, const int whence) | |
| 166 { | |
| 167 int ret = fseek(f->fh, pos, whence); | |
| 168 f->error = dmGetErrno(); | |
| 169 return ret; | |
| 170 } | |
| 171 | |
| 172 | |
| 173 static off_t dm_stdio_fsize(DMResource *f) | |
| 174 { | |
| 175 off_t savePos, fileSize; | |
| 176 | |
| 177 // Check if the size is cached | |
| 178 if (f->dataSize != 0) | |
| 179 return f->dataSize; | |
| 180 | |
| 181 // Get file size | |
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182 savePos = ftello(f->fh); |
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183 if (fseeko(f->fh, 0L, SEEK_END) != 0) |
| 0 | 184 { |
| 185 f->error = dmGetErrno(); | |
| 186 return -1; | |
| 187 } | |
| 188 | |
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189 fileSize = ftello(f->fh); |
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190 if (fseeko(f->fh, savePos, SEEK_SET) != 0) |
| 0 | 191 { |
| 192 f->error = dmGetErrno(); | |
| 193 return -1; | |
| 194 } | |
| 195 | |
| 196 f->dataSize = fileSize; | |
| 197 return fileSize; | |
| 198 } | |
| 199 | |
| 200 | |
| 201 static off_t dm_stdio_ftell(DMResource * f) | |
| 202 { | |
| 203 return ftell(f->fh); | |
| 204 } | |
| 205 | |
| 206 | |
| 207 static BOOL dm_stdio_feof(DMResource * f) | |
| 208 { | |
| 209 return feof(f->fh); | |
| 210 } | |
| 211 | |
| 212 | |
| 213 static int dm_stdio_fgetc(DMResource * f) | |
| 214 { | |
| 215 int ret = fgetc(f->fh); | |
| 216 f->error = dmGetErrno(); | |
| 217 return ret; | |
| 218 } | |
| 219 | |
| 220 | |
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221 static int dm_stdio_fputc(int v, DMResource * f) |
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222 { |
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223 int ret = fputc(v, f->fh); |
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224 f->error = dmGetErrno(); |
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225 return ret; |
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226 } |
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227 |
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228 |
| 0 | 229 static size_t dm_stdio_fread(void *ptr, size_t size, size_t nmemb, DMResource * f) |
| 230 { | |
| 231 size_t ret = fread(ptr, size, nmemb, f->fh); | |
| 232 f->error = dmGetErrno(); | |
| 233 return ret; | |
| 234 } | |
| 235 | |
| 236 | |
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237 static size_t dm_stdio_fwrite(void *ptr, size_t size, size_t nmemb, DMResource * f) |
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238 { |
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239 size_t ret = fwrite(ptr, size, nmemb, f->fh); |
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240 f->error = dmGetErrno(); |
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241 return ret; |
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242 } |
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243 |
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244 |
| 0 | 245 static int dm_stdio_preload(DMResource *handle) |
| 246 { | |
| 247 int ret = dm_stdio_fopen(handle); | |
| 248 if (ret != DMERR_OK) | |
| 249 return ret; | |
| 250 | |
| 251 dm_stdio_fsize(handle); | |
| 252 | |
| 253 handle->data = dmMalloc(handle->dataSize); | |
| 254 if (handle->data == NULL) | |
| 255 return DMERR_MALLOC; | |
| 256 | |
| 257 if (dm_stdio_fread(handle->data, sizeof(Uint8), handle->dataSize, handle) != handle->dataSize) | |
| 258 return DMERR_FREAD; | |
| 259 | |
| 260 return DMERR_OK; | |
| 261 } | |
| 262 | |
| 263 | |
| 264 DMResourceOps dfStdioFileOps = | |
| 265 { | |
| 266 dm_stdio_ferror, | |
| 267 dm_stdio_fseek, | |
| 268 dm_stdio_fsize, | |
| 269 dm_stdio_ftell, | |
| 270 dm_stdio_feof, | |
| 271 dm_stdio_fgetc, | |
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272 dm_stdio_fputc, |
| 0 | 273 dm_stdio_fread, |
|
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274 dm_stdio_fwrite, |
| 0 | 275 |
| 276 dm_stdio_fopen, | |
| 277 dm_stdio_fclose, | |
| 278 dm_stdio_preload | |
| 279 }; | |
| 280 | |
| 281 DMResourceOps dfStdioFHOps = | |
| 282 { | |
| 283 dm_stdio_ferror, | |
| 284 dm_stdio_fseek, | |
| 285 dm_stdio_fsize, | |
| 286 dm_stdio_ftell, | |
| 287 dm_stdio_feof, | |
| 288 dm_stdio_fgetc, | |
|
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289 dm_stdio_fputc, |
| 0 | 290 dm_stdio_fread, |
|
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291 dm_stdio_fwrite, |
| 0 | 292 |
| 293 NULL, | |
| 294 NULL, | |
| 295 NULL | |
| 296 }; | |
| 297 #endif | |
| 298 | |
| 299 | |
| 300 // Some mingw/windows headers define these as macros, which is bad for us | |
| 301 #ifdef __WIN32 | |
| 302 #undef ferror | |
| 303 #undef feof | |
| 304 #endif | |
| 305 | |
| 306 | |
| 307 /* | |
| 308 * PACK file routines | |
| 309 */ | |
|
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310 #ifdef DM_USE_PACKFS |
| 0 | 311 static int dm_pack_preload(DMResource *handle) |
| 312 { | |
| 313 DMPackEntry *node; | |
| 314 int res = DMERR_OK, cres, cdataLeft; | |
| 315 z_stream cstream; | |
| 316 Uint8 * cbuffer = NULL; | |
| 317 | |
|
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318 if (handle->lib == NULL || handle->lib->packFile == NULL) |
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319 return DMERR_NULLPTR; |
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320 |
| 0 | 321 // Search PACK nodelist for file |
|
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322 if ((node = dm_pack_find(handle->lib->packFile->entries, handle->filename)) == NULL) |
| 0 | 323 { |
| 324 dmError("Entry '%s' not found in PACK file.\n", handle->filename); | |
| 325 res = DMERR_NOT_FOUND; | |
| 326 goto error; | |
| 327 } | |
| 328 | |
| 329 // Seek to entry | |
|
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330 if (fseek(handle->lib->packFile->file, node->offset, SEEK_SET) == -1) |
| 0 | 331 { |
| 332 dmError("Could not seek node position in PACK file.\n"); | |
| 333 res = DMERR_FSEEK; | |
| 334 goto error; | |
| 335 } | |
| 336 | |
| 337 // Allocate a structures and buffers | |
| 338 cbuffer = (Uint8 *) dmMalloc(DPACK_TMPSIZE); | |
| 339 if (cbuffer == NULL) | |
| 340 { | |
| 341 res = DMERR_MALLOC; | |
| 342 goto error; | |
| 343 } | |
| 344 | |
| 345 // Initialize fields | |
| 346 handle->dataOffset = 0; | |
| 347 handle->dataSize = node->size; | |
| 348 handle->data = (Uint8 *) dmMalloc(node->size); | |
| 349 if (handle->data == NULL) | |
| 350 { | |
| 351 res = DMERR_MALLOC; | |
| 352 goto error; | |
| 353 } | |
| 354 | |
| 355 // Initialize decompression | |
| 356 cstream.zalloc = (alloc_func) Z_NULL; | |
| 357 cstream.zfree = (free_func) Z_NULL; | |
| 358 cstream.opaque = (voidpf) Z_NULL; | |
| 359 cstream.next_out = handle->data; | |
| 360 cstream.avail_out = handle->dataSize; | |
| 361 cdataLeft = node->length; | |
| 362 cres = inflateInit(&(cstream)); | |
| 363 if (cres != Z_OK) | |
| 364 { | |
| 365 dmError("Could not initialize zlib stream inflation.\n"); | |
| 366 res = DMERR_INIT_FAIL; | |
| 367 goto error; | |
| 368 } | |
| 369 | |
| 370 // Uncompress the data | |
| 371 while (cdataLeft > 0 && | |
| 372 cstream.avail_out > 0 && cres == Z_OK) | |
| 373 { | |
| 374 cstream.avail_in = fread( | |
| 375 cbuffer, sizeof(Uint8), | |
| 376 (cdataLeft >= DPACK_TMPSIZE) ? DPACK_TMPSIZE : cdataLeft, | |
|
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377 handle->lib->packFile->file); |
| 0 | 378 |
| 379 cdataLeft -= cstream.avail_in; | |
| 380 cstream.next_in = cbuffer; | |
| 381 cres = inflate(&cstream, Z_FULL_FLUSH); | |
| 382 } | |
| 383 | |
| 384 // Cleanup | |
| 385 inflateEnd(&(cstream)); | |
| 386 | |
| 387 error: | |
| 388 dmFree(cbuffer); | |
| 389 return res; | |
| 390 } | |
| 391 | |
| 392 | |
|
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393 static void dm_pack_fclose(DMResource * f) |
| 0 | 394 { |
| 395 f->dataSize = 0; | |
| 396 f->dataOffset = 0; | |
| 397 dmFree(f->data); | |
| 398 f->data = NULL; | |
| 399 } | |
|
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400 #endif |
| 0 | 401 |
| 402 | |
| 403 static int dm_mem_ferror(DMResource * f) | |
| 404 { | |
| 405 return f->error; | |
| 406 } | |
| 407 | |
| 408 | |
| 409 static int dm_mem_fseek(DMResource * f, const off_t offset, const int whence) | |
| 410 { | |
| 411 off_t newPos; | |
| 412 | |
| 413 // Calculate the new position | |
| 414 switch (whence) | |
| 415 { | |
| 416 case SEEK_SET: | |
| 417 newPos = offset; | |
| 418 break; | |
| 419 | |
| 420 case SEEK_CUR: | |
| 421 newPos = f->dataOffset + offset; | |
| 422 break; | |
| 423 | |
| 424 case SEEK_END: | |
| 425 newPos = f->dataSize + offset; | |
| 426 break; | |
| 427 | |
| 428 default: | |
| 429 return -1; | |
| 430 } | |
| 431 | |
| 432 // Set the new position | |
| 433 f->dataOffset = newPos; | |
| 434 | |
| 435 // Check the new position | |
| 436 if (newPos < 0 && (size_t) newPos >= f->dataSize) | |
| 437 return -1; | |
| 438 | |
| 439 return 0; | |
| 440 } | |
| 441 | |
| 442 | |
| 443 static off_t dm_mem_fsize(DMResource * f) | |
| 444 { | |
| 445 return f->dataSize; | |
| 446 } | |
| 447 | |
| 448 | |
| 449 static off_t dm_mem_ftell(DMResource * f) | |
| 450 { | |
| 451 return f->dataOffset; | |
| 452 } | |
| 453 | |
| 454 | |
| 455 static BOOL dm_mem_feof(DMResource * f) | |
| 456 { | |
| 457 // Check for EOF | |
| 458 if ((size_t) f->dataOffset <= f->dataSize) | |
| 459 return FALSE; | |
| 460 else | |
| 461 return TRUE; | |
| 462 } | |
| 463 | |
| 464 | |
| 465 static int dm_mem_fgetc(DMResource * f) | |
| 466 { | |
| 467 // Check for EOF | |
| 468 if ((size_t) f->dataOffset < f->dataSize) | |
| 469 return (int) f->data[f->dataOffset++]; | |
| 470 else | |
| 471 return EOF; | |
| 472 } | |
| 473 | |
| 474 | |
| 475 static size_t dm_mem_fread(void *buf, size_t size, size_t nmemb, DMResource * f) | |
| 476 { | |
| 477 size_t length = (size * nmemb); | |
| 478 | |
| 479 // Check if we can read the whole chunk | |
| 480 if (((size_t) f->dataOffset + length) >= f->dataSize) | |
| 481 { | |
| 482 nmemb = (f->dataSize - f->dataOffset) / size; | |
| 483 length = size * nmemb; | |
| 484 } | |
| 485 | |
| 486 memcpy(buf, f->data + f->dataOffset, length); | |
| 487 f->dataOffset += length; | |
| 488 return nmemb; | |
| 489 } | |
| 490 | |
| 491 | |
|
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492 #ifdef DM_USE_PACKFS |
| 0 | 493 DMResourceOps dfPackFileOps = |
| 494 { | |
| 495 dm_mem_ferror, | |
| 496 dm_mem_fseek, | |
| 497 dm_mem_fsize, | |
| 498 dm_mem_ftell, | |
| 499 dm_mem_feof, | |
| 500 dm_mem_fgetc, | |
|
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501 NULL, |
| 0 | 502 dm_mem_fread, |
|
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503 NULL, |
| 0 | 504 |
| 505 NULL, | |
|
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506 dm_pack_fclose, |
| 0 | 507 dm_pack_preload |
| 508 }; | |
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509 #endif |
| 0 | 510 |
| 511 | |
| 512 DMResourceOps dfMemIOFileOps = | |
| 513 { | |
| 514 dm_mem_ferror, | |
| 515 dm_mem_fseek, | |
| 516 dm_mem_fsize, | |
| 517 dm_mem_ftell, | |
| 518 dm_mem_feof, | |
| 519 dm_mem_fgetc, | |
|
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520 NULL, |
| 0 | 521 dm_mem_fread, |
|
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522 NULL, |
| 0 | 523 |
| 524 NULL, | |
| 525 NULL, | |
| 526 NULL | |
| 527 }; | |
| 528 | |
| 529 | |
| 530 /* FS file handling functions. These functions call the actual | |
| 531 * functions depending on where the file is located. | |
| 532 */ | |
|
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533 static void dmf_init_fops(DMResource *handle) |
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534 { |
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535 // Check fops |
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536 if (handle->fops == NULL) |
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537 { |
|
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538 #ifdef DM_USE_PACKFS |
|
359
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539 if (handle->lib->flags & DRF_USE_PACK) |
|
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540 handle->fops = &dfPackFileOps; |
|
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541 #ifdef DM_USE_STDIO |
|
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Implement rudimentary resource system.
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542 else |
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543 handle->fops = &dfStdioFileOps; |
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544 #else |
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|
545 handle->fops = &dfPackFileOps; |
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546 #endif |
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547 |
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548 #else |
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549 handle->fops = NULL; |
|
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550 #endif |
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551 } |
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552 } |
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553 |
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554 |
|
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555 int dmf_preload(DMResource *handle) |
|
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556 { |
|
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557 int ret = DMERR_INIT_FAIL; |
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558 |
|
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559 // Check if we want to preload raw data? |
|
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diff
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560 if (((handle->flags & DMF_PRELOAD_RAW) || |
|
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561 (handle->lib->flags & DRF_PRELOAD_ALL)) && |
|
29
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562 (handle->flags & DMF_LOADED_RAW) == 0 && |
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563 handle->fops->preload != NULL) |
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564 { |
|
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565 ret = handle->fops->preload(handle); |
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|
566 if (ret == DMERR_OK) |
|
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567 { |
|
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|
568 handle->flags |= DMF_LOADED_RAW; |
|
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569 } |
|
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570 } |
|
e9f562f07cb0
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|
571 else |
|
e9f562f07cb0
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Matti Hamalainen <ccr@tnsp.org>
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diff
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|
572 { |
|
e9f562f07cb0
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diff
changeset
|
573 if (handle->fops->fopen != NULL) |
|
e9f562f07cb0
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574 ret = handle->fops->fopen(handle); |
|
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575 else |
|
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|
576 if (handle->fops->preload != NULL) |
|
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577 { |
|
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|
578 ret = handle->fops->preload(handle); |
|
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579 if (ret == DMERR_OK) |
|
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580 { |
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581 handle->flags |= DMF_LOADED_RAW; |
|
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582 } |
|
e9f562f07cb0
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diff
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|
583 } |
|
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584 } |
|
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Matti Hamalainen <ccr@tnsp.org>
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585 |
|
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diff
changeset
|
586 // Check if resource data is to be preloaded |
|
359
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587 if (((handle->flags & DMF_PRELOAD_RES) || (handle->lib->flags & DRF_PRELOAD_RES)) && |
|
29
e9f562f07cb0
Modularize some more and fix a nasty bug when raw data is not preloaded but
Matti Hamalainen <ccr@tnsp.org>
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|
588 (handle->flags & DMF_LOADED_RES) == 0 && |
|
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589 handle->rops != NULL && |
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590 handle->rops->load != NULL) |
|
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591 { |
|
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592 ret = handle->rops->load(handle); |
|
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593 if (ret == DMERR_OK) |
|
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594 { |
|
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595 // Okay, mark as loaded |
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596 handle->flags |= DMF_LOADED_RES; |
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597 |
|
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598 // Check if we can purge the raw data now |
|
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599 if ((handle->flags & DMF_PERSIST) == 0) |
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600 dmres_purge_raw_data(handle); |
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601 } |
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602 } |
|
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603 |
|
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604 return ret; |
|
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605 } |
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606 |
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607 |
|
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608 DMResource *dmf_open(DMResourceLib *lib, const char *filename) |
| 0 | 609 { |
| 610 int ret; | |
| 611 DMResource *handle; | |
| 612 | |
| 613 // Check master directory for resource | |
|
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614 if ((handle = dmres_find(lib, filename)) == NULL) |
| 0 | 615 { |
|
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616 #ifdef DM_USE_STDIO |
| 0 | 617 // Hmm.. does not exist? Fall back to a stdio file |
|
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618 handle = dmres_new(lib, filename, 0, 0); |
| 0 | 619 if (handle == NULL) |
| 620 return NULL; | |
| 621 | |
| 622 handle->fops = &dfStdioFileOps; | |
|
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623 dmres_insert(lib, handle); |
| 0 | 624 #else |
| 625 // Stdio not enabled, fail | |
| 626 return NULL; | |
| 627 #endif | |
| 628 } | |
| 629 | |
|
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630 // Initialize file ops |
|
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631 dmf_init_fops(handle); |
| 0 | 632 |
| 633 // Check if the data is preloaded | |
|
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634 if (handle->flags & DMF_LOADED_RAW) |
| 0 | 635 { |
| 636 dmres_ref(handle); | |
| 637 return handle; | |
| 638 } | |
| 639 | |
|
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640 // Try preloading |
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641 ret = dmf_preload(handle); |
| 0 | 642 |
| 643 if (ret == DMERR_OK) | |
|
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644 { |
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645 dmres_ref(handle); |
| 0 | 646 return handle; |
|
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647 } |
| 0 | 648 |
| 649 return NULL; | |
| 650 } | |
| 651 | |
| 652 | |
|
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653 DMResource * dmf_create_memio(DMResourceLib *lib, const char *filename, Uint8 *buf, size_t len) |
| 0 | 654 { |
| 655 DMResource *handle; | |
| 656 | |
| 657 // Check master directory for resource | |
|
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658 if ((handle = dmres_find(lib, filename)) == NULL) |
| 0 | 659 { |
| 660 // Hmm.. does not exist? Fall back to a stdio file | |
|
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661 handle = dmres_new(lib, filename, DMF_LOADED_RAW, len); |
| 0 | 662 if (handle == NULL) |
| 663 return NULL; | |
| 664 | |
| 665 handle->fops = &dfMemIOFileOps; | |
| 666 handle->data = buf; | |
|
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667 dmres_insert(lib, handle); |
| 0 | 668 } |
| 669 | |
| 670 // Increase refcount | |
| 671 dmres_ref(handle); | |
| 672 | |
| 673 return handle; | |
| 674 } | |
| 675 | |
| 676 | |
|
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677 #ifdef DM_USE_STDIO |
|
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678 DMResource * dmf_create_stdio(const char *filename, const char *mode) |
| 0 | 679 { |
|
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680 DMResource *handle = dmres_new(NULL, filename, 0, 0); |
| 0 | 681 if (handle == NULL) |
| 682 return NULL; | |
| 683 | |
| 684 handle->fops = &dfStdioFileOps; | |
| 685 | |
|
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686 handle->fh = fopen(filename, mode); |
| 0 | 687 handle->error = dmGetErrno(); |
| 688 | |
| 689 if (handle->fh != NULL) | |
| 690 { | |
| 691 dmres_ref(handle); | |
| 692 return handle; | |
| 693 } | |
| 694 else | |
| 695 { | |
| 696 dmres_free(handle); | |
| 697 return NULL; | |
| 698 } | |
| 699 } | |
| 700 | |
| 701 | |
| 702 DMResource * dmf_create_stdio_stream(FILE *fh) | |
| 703 { | |
|
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704 DMResource *handle = dmres_new(NULL, "", 0, 0); |
| 0 | 705 if (handle == NULL) |
| 706 return NULL; | |
| 707 | |
| 708 handle->fops = &dfStdioFHOps; | |
| 709 handle->fh = fh; | |
| 710 dmres_ref(handle); | |
| 711 return handle; | |
| 712 } | |
| 713 #endif | |
| 714 | |
| 715 | |
| 716 void dmf_close(DMResource * f) | |
| 717 { | |
| 718 if (f == NULL) | |
| 719 return; | |
| 720 | |
| 721 if (f->fops->fclose != NULL) | |
| 722 f->fops->fclose(f); | |
| 723 | |
| 724 dmres_unref(f); | |
| 725 } | |
| 726 | |
| 727 | |
| 728 int dmferror(DMResource * f) | |
| 729 { | |
| 730 f->atime = time(NULL); | |
| 731 return f->fops->ferror(f); | |
| 732 } | |
| 733 | |
| 734 int dmfseek(DMResource * f, off_t offset, int whence) | |
| 735 { | |
| 736 f->atime = time(NULL); | |
| 737 return f->fops->fseek(f, offset, whence); | |
| 738 } | |
| 739 | |
| 740 off_t dmfsize(DMResource * f) | |
| 741 { | |
| 742 f->atime = time(NULL); | |
| 743 return f->fops->fsize(f); | |
| 744 } | |
| 745 | |
| 746 off_t dmftell(DMResource * f) | |
| 747 { | |
| 748 f->atime = time(NULL); | |
| 749 return f->fops->ftell(f); | |
| 750 } | |
| 751 | |
| 752 BOOL dmfeof(DMResource * f) | |
| 753 { | |
| 754 f->atime = time(NULL); | |
| 755 return f->fops->feof(f); | |
| 756 } | |
| 757 | |
| 758 int dmfgetc(DMResource * f) | |
| 759 { | |
| 760 f->atime = time(NULL); | |
| 761 return f->fops->fgetc(f); | |
| 762 } | |
| 763 | |
|
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|
764 int dmfputc(int v, DMResource * f) |
|
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765 { |
|
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|
766 f->atime = time(NULL); |
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|
767 return f->fops->fputc(v, f); |
|
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|
768 } |
|
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|
769 |
| 0 | 770 size_t dmfread(void *ptr, size_t size, size_t nmemb, DMResource * f) |
| 771 { | |
| 772 f->atime = time(NULL); | |
| 773 return f->fops->fread(ptr, size, nmemb, f); | |
| 774 } | |
| 775 | |
|
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|
776 size_t dmfwrite(void *ptr, size_t size, size_t nmemb, DMResource * f) |
|
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|
777 { |
|
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|
778 f->atime = time(NULL); |
|
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|
779 return f->fops->fwrite(ptr, size, nmemb, f); |
|
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|
780 } |
|
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|
781 |
| 235 | 782 char *dmfgets(char *s, int size, DMResource * f) |
| 783 { | |
| 784 char *p = s, c; | |
| 785 int n = 0; | |
| 786 | |
| 787 while ((c = f->fops->fgetc(f)) != EOF) | |
| 788 { | |
|
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|
789 n++; |
| 235 | 790 if (c == '\n') |
| 791 break; | |
| 792 else | |
| 793 if (n < size - 1) | |
| 794 *p++ = c; | |
| 795 } | |
| 796 *p = 0; | |
| 797 | |
|
236
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Oops, dmfgets() had a nasty think-o and counted the remaining buffer space
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|
798 return (n > 0) ? s : NULL; |
| 235 | 799 } |
| 800 | |
| 801 | |
|
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|
802 int dmres_ref(DMResource *node) |
| 0 | 803 { |
|
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|
804 if (node->lib != NULL) dmMutexLock(node->lib->mutex); |
|
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|
805 node->atime = time(NULL); |
|
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|
806 node->refcount++; |
|
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|
807 if (node->lib != NULL) dmMutexUnlock(node->lib->mutex); |
| 0 | 808 |
|
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diff
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|
809 return node->refcount; |
| 0 | 810 } |
| 811 | |
| 812 | |
|
27
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|
813 int dmres_unref(DMResource *node) |
| 0 | 814 { |
|
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|
815 if (node->lib != NULL) dmMutexLock(node->lib->mutex); |
|
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|
816 node->refcount--; |
|
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|
817 if (node->lib != NULL) dmMutexUnlock(node->lib->mutex); |
| 0 | 818 |
|
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|
819 return node->refcount; |
| 0 | 820 } |
| 821 | |
| 822 | |
|
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|
823 #define NADDFLAG(flg, ch) \ |
|
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|
824 do { \ |
|
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|
825 if ((flags & (flg)) && offs < size - 1) \ |
|
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|
826 str[offs++] = ch; \ |
|
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|
827 } while (0) |
|
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|
828 |
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|
829 void dmres_flags_to_symbolic(char *str, size_t size, int flags) |
|
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|
830 { |
|
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|
831 size_t offs = 0; |
|
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|
832 NADDFLAG(DMF_PRELOAD_RAW, 'r'); |
|
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|
833 NADDFLAG(DMF_PRELOAD_RES, 'e'); |
|
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|
834 NADDFLAG(DMF_PERSIST, 'p'); |
|
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|
835 NADDFLAG(DMF_STREAM, 's'); |
|
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|
836 if (offs < size) |
|
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|
837 str[offs] = 0; |
|
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|
838 } |
|
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|
839 |
|
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|
840 #undef NADDFLAG |
|
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841 |
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842 |
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843 int dmres_symbolic_to_flags(const char *str) |
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844 { |
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845 int offs, flags; |
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846 |
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847 for (flags = offs = 0; str[offs]; offs++) |
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848 switch (tolower(str[offs])) |
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849 { |
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850 case 'r': flags |= DMF_PRELOAD_RAW; break; |
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851 case 'e': flags |= DMF_PRELOAD_RES; break; |
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852 case 'p': flags |= DMF_PERSIST; break; |
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853 case 's': flags |= DMF_STREAM; break; |
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854 } |
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855 return flags; |
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856 } |
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857 |
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858 |
|
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859 int dmres_load_resfile(DMResourceLib *lib, const char *filename) |
| 0 | 860 { |
| 33 | 861 int ret = DMERR_OK; |
| 0 | 862 char line[256]; |
| 863 FILE *f = fopen(filename, "r"); | |
| 864 if (f == NULL) | |
| 865 return DMERR_FOPEN; | |
| 866 | |
|
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867 dmMutexLock(lib->mutex); |
| 0 | 868 |
| 869 while (fgets(line, sizeof(line) - 1, f) != NULL) | |
| 870 { | |
| 871 int fnstart, fsep; | |
| 872 for (fnstart = 0; isspace(line[fnstart]); fnstart++); | |
| 873 for (fsep = fnstart; line[fsep] && line[fsep] != '|'; fsep++); | |
| 874 if (line[fsep] == '|') | |
| 875 { | |
| 876 int flags, i; | |
| 877 for (i = fsep - 1; i > 0 && isspace(line[i]); i--) | |
| 878 line[i] = 0; | |
| 879 | |
| 880 for (i = fsep; isspace(line[i]); i++); | |
| 881 } | |
| 882 } | |
| 883 | |
|
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884 dmMutexUnlock(lib->mutex); |
| 0 | 885 fclose(f); |
| 33 | 886 |
| 0 | 887 return ret; |
| 888 } | |
| 889 | |
| 890 | |
|
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891 int dmres_write_resfile(DMResourceLib *lib, const char *filename) |
| 0 | 892 { |
| 893 int ret; | |
| 894 DMResource *node; | |
| 895 FILE *f = fopen(filename, "w"); | |
| 896 if (f == NULL) | |
| 897 return DMERR_FOPEN; | |
| 898 | |
|
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899 dmMutexLock(lib->mutex); |
| 0 | 900 |
|
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901 for (node = lib->resources; node != NULL; node = node->next) |
| 0 | 902 { |
|
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903 char tmp[64]; |
|
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904 dmres_flags_to_symbolic(tmp, sizeof(tmp), node->flags); |
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905 if (fprintf(f, "%s|%s\n", node->filename, tmp) < 0) |
| 0 | 906 { |
| 907 ret = DMERR_FWRITE; | |
| 908 goto error; | |
| 909 } | |
| 910 } | |
| 911 | |
| 912 error: | |
|
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913 dmMutexUnlock(lib->mutex); |
| 0 | 914 fclose(f); |
| 915 return ret; | |
| 916 } | |
| 917 | |
| 918 | |
| 919 /* Resources subsystem initialization and shutdown routines | |
| 920 */ | |
|
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921 int dmres_init(DMResourceLib **plib, const char *filename, const char *path, const int flags, int (*classifier)(DMResource *)) |
| 0 | 922 { |
|
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923 DMResourceLib *lib; |
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924 |
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925 // Allocate the resource library structure |
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926 if ((*plib = lib = dmMalloc0(sizeof(DMResourceLib))) == NULL) |
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927 return DMERR_MALLOC; |
| 0 | 928 |
|
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929 // Basic data |
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930 lib->mutex = dmCreateMutex(); |
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931 lib->flags = flags; |
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932 lib->resPath = dm_strdup((path != NULL) ? path : DMRES_DATA_PATH); |
| 0 | 933 |
| 107 | 934 |
| 0 | 935 if (flags & DRF_USE_PACK) |
| 936 { | |
|
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937 #ifdef DM_USE_PACKFS |
| 0 | 938 int ret; |
| 939 DMPackEntry *node; | |
| 940 | |
|
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941 lib->packFilename = dm_strdup((filename != NULL) ? filename : DMRES_DATA_PACK); |
| 0 | 942 |
| 943 // Initialize PACK, open as read-only | |
|
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944 ret = dm_pack_open(lib->packFilename, &lib->packFile, TRUE); |
| 0 | 945 if (ret != DMERR_OK) |
| 946 { | |
| 947 dmError("Error opening PACK file '%s', #%i: %s\n", | |
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948 lib->packFilename, ret, dmErrorStr(ret)); |
| 0 | 949 |
| 950 return DMERR_INIT_FAIL; | |
| 951 } | |
| 952 | |
| 953 // Initialize resources from a PACK file | |
|
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954 for (node = lib->packFile->entries; node != NULL; node = node->next) |
| 0 | 955 { |
|
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956 DMResource *res = dmres_new(lib, node->filename, node->resFlags & DMF_MASK, node->size); |
| 0 | 957 if (res == NULL) |
| 958 { | |
| 959 dmError("Could not allocate memory for resource node '%s' [0x%08x], %d.\n", | |
| 960 node->filename, node->resFlags, node->size); | |
| 961 return DMERR_INIT_FAIL; | |
| 962 } | |
| 963 | |
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964 dmres_insert(lib, res); |
| 0 | 965 } |
| 966 | |
| 967 #else | |
| 968 // PACK not compiled in, FAIL! | |
| 969 return DMERR_INIT_FAIL; | |
| 970 #endif | |
| 971 } | |
| 972 else | |
| 973 { | |
| 974 // Initialize resources from a resource directory | |
|
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975 char *resFilename = dm_strdup_printf("%s%s", lib->resPath, DMRES_RES_FILE); |
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976 int ret = dmres_load_resfile(lib, resFilename); |
| 0 | 977 dmFree(resFilename); |
| 978 | |
| 979 if (ret != DMERR_OK) | |
| 980 return DMERR_INIT_FAIL; | |
| 981 } | |
| 982 | |
|
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983 // Okay, classify resources |
|
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984 if (lib->resources != NULL && classifier != NULL) |
|
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985 { |
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986 DMResource *node; |
|
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987 for (node = lib->resources; node != NULL; node = node->next) |
|
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988 { |
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989 int ret = classifier(node); |
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990 if (ret != DMERR_OK) |
| 107 | 991 return ret; |
|
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992 } |
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993 } |
| 0 | 994 |
| 995 // Initialization complete | |
| 996 return DMERR_OK; | |
| 997 } | |
| 998 | |
| 999 | |
|
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1000 int dmres_close(DMResourceLib *lib) |
| 0 | 1001 { |
| 1002 DMResource *node; | |
|
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1003 |
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1004 if (lib == NULL) |
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1005 return DMERR_NULLPTR; |
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1006 |
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1007 dmMutexLock(lib->mutex); |
| 0 | 1008 |
| 1009 // Shutdown possible subsystems | |
|
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1010 #ifdef DM_USE_PACKFS |
|
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1011 if (lib->flags & DRF_USE_PACK) |
| 0 | 1012 { |
|
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1013 int res = dm_pack_close(lib->packFile); |
| 0 | 1014 if (res != DMERR_OK) |
| 1015 { | |
| 1016 dmError("Error closing PACK, #%i: %s\n", | |
| 1017 res, dmErrorStr(res)); | |
| 1018 } | |
| 1019 | |
|
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1020 dmFree(lib->packFilename); |
| 0 | 1021 } |
| 1022 #endif | |
| 1023 | |
| 1024 // Free resource entries | |
|
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1025 node = lib->resources; |
| 0 | 1026 while (node != NULL) |
| 1027 { | |
| 1028 DMResource *next = node->next; | |
| 1029 dmres_free(node); | |
| 1030 node = next; | |
| 1031 } | |
| 1032 | |
| 1033 // Etc. | |
|
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1034 dmFree(lib->resPath); |
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1035 dmMutexUnlock(lib->mutex); |
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1036 dmDestroyMutex(lib->mutex); |
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1037 return DMERR_OK; |
| 0 | 1038 } |
| 1039 | |
| 1040 | |
|
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1041 int dmres_preload(DMResourceLib *lib, BOOL start, int *loaded, int *total) |
| 0 | 1042 { |
|
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1043 int ret = DMERR_OK; |
| 0 | 1044 |
|
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1045 dmMutexLock(lib->mutex); |
| 0 | 1046 |
|
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1047 // Initialize preloading |
|
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1048 if (lib->preload == NULL || start) |
| 0 | 1049 { |
| 1050 DMResource *node; | |
|
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1051 |
|
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1052 lib->preload = lib->resources; |
| 0 | 1053 *loaded = 0; |
| 1054 *total = 0; | |
|
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1055 |
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1056 // Calculate total number of resources to be preloaded |
|
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1057 for (node = lib->resources; node != NULL; node = node->next) |
| 0 | 1058 { |
|
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1059 if ((lib->flags & (DRF_PRELOAD_ALL | DRF_PRELOAD_RES)) || |
|
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1060 (node->flags & (DMF_PRELOAD_RAW | DMF_PRELOAD_RES))) |
| 0 | 1061 (*total)++; |
| 1062 } | |
| 1063 } | |
|
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1064 else |
|
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1065 if (lib->preload != NULL) |
| 0 | 1066 { |
|
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1067 // Initialize fops and preload |
|
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1068 dmf_init_fops(lib->preload); |
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1069 if ((ret = dmf_preload(lib->preload)) != DMERR_OK) |
|
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1070 goto error; |
|
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1071 |
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1072 (*loaded)++; |
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1073 lib->preload = lib->preload->next; |
| 0 | 1074 } |
| 1075 | |
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1076 dmMutexUnlock(lib->mutex); |
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1077 return (lib->preload == NULL) ? DMERR_OK : DMERR_PROGRESS; |
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1078 |
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1079 error: |
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1080 dmMutexUnlock(lib->mutex); |
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1081 return ret; |
| 0 | 1082 } |
| 1083 | |
| 1084 | |
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1085 void dmres_prune(DMResourceLib *lib, int agems, int flags) |
| 0 | 1086 { |
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1087 DMResource *node; |
| 0 | 1088 int currtime = time(NULL); |
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1089 dmMutexLock(lib->mutex); |
| 0 | 1090 |
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1091 for (node = lib->resources; node != NULL; node = node->next) |
| 0 | 1092 { |
| 1093 // Check if node has refcount of 0 and is | |
| 1094 // not marked as persistent resource | |
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1095 if (node->refcount == 0 && |
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1096 (node->flags & DMF_PERSIST) == 0 && |
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1097 (node->flags & (DMF_LOADED_RES | DMF_LOADED_RAW))) |
| 0 | 1098 { |
| 1099 // Check if we match either one of atime or mtime | |
| 1100 if (((flags & DMPRUNE_ATIME) && | |
| 1101 currtime - node->atime >= agems) || | |
| 1102 ((flags & DMPRUNE_MTIME) && | |
| 1103 currtime - node->mtime >= agems)) | |
| 1104 { | |
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1105 dmres_free_res_data(node); |
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1106 dmres_free_raw_data(node); |
| 0 | 1107 } |
| 1108 } | |
| 1109 } | |
| 1110 | |
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1111 dmMutexUnlock(lib->mutex); |
| 0 | 1112 } |
| 1113 | |
| 1114 | |
| 1115 /* Helper resource access routines | |
| 1116 */ | |
| 1117 int dmf_read_str(DMResource *f, Uint8 *s, size_t l) | |
| 1118 { | |
| 1119 return dmfread(s, sizeof(Uint8), l, f) == l; | |
| 1120 } | |
| 1121 | |
| 1122 | |
| 1123 #define DM_DEFINE_FUNC(xname, xtype, xmacro) \ | |
| 1124 BOOL dmf_read_ ## xname (DMResource *f, xtype *v) { \ | |
| 1125 xtype result; \ | |
| 1126 if (dmfread(&result, sizeof( xtype ), 1, f) != 1) \ | |
| 1127 return FALSE; \ | |
| 1128 *v = DM_ ## xmacro ## _TO_NATIVE (result); \ | |
| 1129 return TRUE; \ | |
| 1130 } | |
| 1131 | |
| 1132 DM_DEFINE_FUNC(le16, Uint16, LE16) | |
| 1133 DM_DEFINE_FUNC(le32, Uint32, LE32) | |
| 1134 | |
| 1135 DM_DEFINE_FUNC(be16, Uint16, BE16) | |
| 1136 DM_DEFINE_FUNC(be32, Uint32, BE32) | |
| 1137 | |
| 1138 #ifdef DM_HAVE_64BIT | |
| 1139 DM_DEFINE_FUNC(le64, Uint64, LE64) | |
| 1140 DM_DEFINE_FUNC(be64, Uint64, BE64) | |
| 1141 #endif |