| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | #ifdef ZLIB |
| 26 | #include <zlib.h> |
| 27 | #include "zlib/unzip.h" |
| 28 | #endif |
| 29 | |
| 30 | #include "types.h" |
| 31 | #include "file.h" |
| 32 | #include "endian.h" |
| 33 | #include "memory.h" |
| 34 | #include "driver.h" |
| 35 | #include "svga.h" |
| 36 | |
| 37 | static void *desctable[8]={0,0,0,0,0,0,0,0}; |
| 38 | static int x; |
| 39 | |
| 40 | /* |
| 41 | typedef struct { |
| 42 | uint8 *data; |
| 43 | uint32 size; |
| 44 | uint32 location; |
| 45 | } MEMWRAP; |
| 46 | */ |
| 47 | typedef struct { |
| 48 | uint8 *data; |
| 49 | uint32 size; |
| 50 | uint32 location; |
| 51 | } ZIPWRAP; |
| 52 | #define MEMWRAP ZIPWRAP |
| 53 | |
| 54 | void ApplyIPS(FILE *ips, int destf) |
| 55 | { |
| 56 | uint8 header[5]; |
| 57 | uint32 count=0; |
| 58 | MEMWRAP *dest; |
| 59 | |
| 60 | FCEU_printf(" Applying IPS...\n"); |
| 61 | if(!(destf&0x8000)) |
| 62 | { |
| 63 | FCEU_printf("failed (bad destf).\n"); |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | dest=(MEMWRAP*)desctable[(destf&255)-1]; |
| 68 | |
| 69 | if(fread(header,1,5,ips)!=5) |
| 70 | { |
| 71 | FCEU_printf("failed (bad header).\n"); |
| 72 | fclose(ips); |
| 73 | return; |
| 74 | } |
| 75 | if(memcmp(header,"PATCH",5)) |
| 76 | { |
| 77 | FCEU_printf("failed (bad header).\n"); |
| 78 | fclose(ips); |
| 79 | return; |
| 80 | } |
| 81 | |
| 82 | while(fread(header,1,3,ips)==3) |
| 83 | { |
| 84 | uint32 offset=(header[0]<<16)|(header[1]<<8)|header[2]; |
| 85 | uint16 size; |
| 86 | |
| 87 | if(!memcmp(header,"EOF",3)) |
| 88 | { |
| 89 | FCEU_printf(" IPS EOF: Did %d patches\n\n",count); |
| 90 | fclose(ips); |
| 91 | return; |
| 92 | } |
| 93 | |
| 94 | size=fgetc(ips)<<8; |
| 95 | size|=fgetc(ips); |
| 96 | if(!size) /* RLE */ |
| 97 | { |
| 98 | uint8 *start; |
| 99 | uint8 b; |
| 100 | size=fgetc(ips)<<8; |
| 101 | size|=fgetc(ips); |
| 102 | |
| 103 | //FCEU_printf(" Offset: %8d Size: %5d RLE\n",offset,size); |
| 104 | |
| 105 | if((offset+size)>dest->size) |
| 106 | { |
| 107 | uint8 *tmp; |
| 108 | |
| 109 | // Probably a little slow. |
| 110 | tmp=(uint8 *)realloc(dest->data,offset+size); |
| 111 | if(!tmp) |
| 112 | { |
| 113 | FCEU_printf(" Oops. IPS patch %d(type RLE) goes beyond end of file. Could not allocate memory.\n",count); |
| 114 | fclose(ips); |
| 115 | return; |
| 116 | } |
| 117 | dest->size=offset+size; |
| 118 | dest->data=tmp; |
| 119 | memset(dest->data+dest->size,0,offset+size-dest->size); |
| 120 | } |
| 121 | b=fgetc(ips); |
| 122 | start=dest->data+offset; |
| 123 | do |
| 124 | { |
| 125 | *start=b; |
| 126 | start++; |
| 127 | } while(--size); |
| 128 | } |
| 129 | else /* Normal patch */ |
| 130 | { |
| 131 | //FCEU_printf(" Offset: %8d Size: %5d\n",offset,size); |
| 132 | if((offset+size)>dest->size) |
| 133 | { |
| 134 | uint8 *tmp; |
| 135 | |
| 136 | // Probably a little slow. |
| 137 | tmp=(uint8 *)realloc(dest->data,offset+size); |
| 138 | if(!tmp) |
| 139 | { |
| 140 | FCEU_printf(" Oops. IPS patch %d(type normal) goes beyond end of file. Could not allocate memory.\n",count); |
| 141 | fclose(ips); |
| 142 | return; |
| 143 | } |
| 144 | dest->data=tmp; |
| 145 | memset(dest->data+dest->size,0,offset+size-dest->size); |
| 146 | } |
| 147 | fread(dest->data+offset,1,size,ips); |
| 148 | } |
| 149 | count++; |
| 150 | } |
| 151 | fclose(ips); |
| 152 | FCEU_printf(" Hard IPS end!\n"); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | #ifdef ZLIB |
| 157 | |
| 158 | |
| 159 | void *MakeZipWrap(void *tz) |
| 160 | { |
| 161 | unz_file_info ufo; |
| 162 | ZIPWRAP *tmp; |
| 163 | |
| 164 | if(!(tmp=FCEU_malloc(sizeof(ZIPWRAP)))) |
| 165 | goto doret; |
| 166 | |
| 167 | unzGetCurrentFileInfo(tz,&ufo,0,0,0,0,0,0); |
| 168 | |
| 169 | tmp->location=0; |
| 170 | tmp->size=ufo.uncompressed_size; |
| 171 | if(!(tmp->data=FCEU_malloc(ufo.uncompressed_size))) |
| 172 | { |
| 173 | tmp=0; |
| 174 | goto doret; |
| 175 | } |
| 176 | |
| 177 | unzReadCurrentFile(tz,tmp->data,ufo.uncompressed_size); |
| 178 | |
| 179 | doret: |
| 180 | |
| 181 | unzCloseCurrentFile(tz); |
| 182 | unzClose(tz); |
| 183 | |
| 184 | return tmp; |
| 185 | } |
| 186 | #endif |
| 187 | |
| 188 | #ifndef __GNUC__ |
| 189 | #define strcasecmp strcmp |
| 190 | #endif |
| 191 | |
| 192 | int FASTAPASS(2) FCEU_fopen(char *path, char *mode) |
| 193 | { |
| 194 | void *t; |
| 195 | |
| 196 | #ifdef ZLIB |
| 197 | unzFile tz; |
| 198 | if((tz=unzOpen(path))) // If it's not a zip file, use regular file handlers. |
| 199 | // Assuming file type by extension usually works, |
| 200 | // but I don't like it. :) |
| 201 | { |
| 202 | if(unzGoToFirstFile(tz)==UNZ_OK) |
| 203 | { |
| 204 | for(;;) |
| 205 | { |
| 206 | char tempu[512]; // Longer filenames might be possible, but I don't |
| 207 | // think people would name files that long in zip files... |
| 208 | unzGetCurrentFileInfo(tz,0,tempu,512,0,0,0,0); |
| 209 | tempu[511]=0; |
| 210 | if(strlen(tempu)>=4) |
| 211 | { |
| 212 | char *za=tempu+strlen(tempu)-4; |
| 213 | if(!strcasecmp(za,".nes") || !strcasecmp(za,".fds") || |
| 214 | !strcasecmp(za,".nsf") || !strcasecmp(za,".unf") || |
| 215 | !strcasecmp(za,".nez")) |
| 216 | break; |
| 217 | } |
| 218 | if(strlen(tempu)>=5) |
| 219 | { |
| 220 | if(!strcasecmp(tempu+strlen(tempu)-5,".unif")) |
| 221 | break; |
| 222 | } |
| 223 | if(unzGoToNextFile(tz)!=UNZ_OK) |
| 224 | { |
| 225 | if(unzGoToFirstFile(tz)!=UNZ_OK) goto zpfail; |
| 226 | break; |
| 227 | } |
| 228 | } |
| 229 | if(unzOpenCurrentFile(tz)!=UNZ_OK) |
| 230 | goto zpfail; |
| 231 | } |
| 232 | else |
| 233 | { |
| 234 | zpfail: |
| 235 | unzClose(tz); |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | for(x=0;x<8;x++) |
| 240 | if(!desctable[x]) |
| 241 | { |
| 242 | if(!(desctable[x]=MakeZipWrap(tz))) |
| 243 | return(0); |
| 244 | return((x+1)|0x8000); |
| 245 | } |
| 246 | } |
| 247 | #endif |
| 248 | |
| 249 | #ifdef ZLIB |
| 250 | if((t=fopen(path,"rb"))) |
| 251 | { |
| 252 | uint32 magic; |
| 253 | |
| 254 | magic=fgetc(t); |
| 255 | magic|=fgetc(t)<<8; |
| 256 | magic|=fgetc(t)<<16; |
| 257 | |
| 258 | fclose(t); |
| 259 | |
| 260 | if(magic==0x088b1f) |
| 261 | { |
| 262 | if((t=gzopen(path,mode))) |
| 263 | for(x=0;x<8;x++) |
| 264 | if(!desctable[x]) |
| 265 | { |
| 266 | desctable[x]=t; |
| 267 | return((x+1)|0x4000); |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | #endif |
| 272 | |
| 273 | if((t=fopen(path,mode))) |
| 274 | { |
| 275 | fseek(t,0,SEEK_SET); |
| 276 | for(x=0;x<8;x++) |
| 277 | if(!desctable[x]) |
| 278 | { |
| 279 | desctable[x]=t; |
| 280 | return(x+1); |
| 281 | } |
| 282 | } |
| 283 | return 0; |
| 284 | } |
| 285 | |
| 286 | int FASTAPASS(1) FCEU_fopen_forcemem(char *path) |
| 287 | { |
| 288 | MEMWRAP *tmp; |
| 289 | long size; |
| 290 | int fp; |
| 291 | |
| 292 | fp=FCEU_fopen(path, "rb"); |
| 293 | if (!fp) return 0; |
| 294 | |
| 295 | if (fp&0x8000) return fp; |
| 296 | |
| 297 | if (!(tmp=FCEU_malloc(sizeof(*tmp)))) |
| 298 | goto retr; |
| 299 | |
| 300 | size=FCEU_fgetsize(fp); |
| 301 | if (size <= 0) goto retr; |
| 302 | tmp->size=size; |
| 303 | tmp->data=FCEU_malloc(size); |
| 304 | if (!tmp->data) goto retr; |
| 305 | FCEU_fread(tmp->data, 1, size, fp); |
| 306 | FCEU_fclose(fp); fp=0; |
| 307 | tmp->location=0; |
| 308 | |
| 309 | for(x=0;x<8;x++) |
| 310 | if(!desctable[x]) |
| 311 | { |
| 312 | desctable[x]=tmp; |
| 313 | return (x+1)|0x8000; |
| 314 | } |
| 315 | |
| 316 | retr: |
| 317 | if (fp) FCEU_fclose(fp); |
| 318 | if (tmp && tmp->data) FCEU_free(tmp->data); |
| 319 | if (tmp) FCEU_free(tmp); |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | int FASTAPASS(1) FCEU_fclose(int stream) |
| 324 | { |
| 325 | #ifdef ZLIB |
| 326 | if(stream&0x4000) |
| 327 | { |
| 328 | gzclose(desctable[(stream&255)-1]); |
| 329 | desctable[(stream&255)-1]=0; |
| 330 | } |
| 331 | else if(stream&0x8000) |
| 332 | { |
| 333 | free(((ZIPWRAP*)desctable[(stream&255)-1])->data); |
| 334 | free(desctable[(stream&255)-1]); |
| 335 | desctable[(stream&255)-1]=0; |
| 336 | } |
| 337 | else // close zip file |
| 338 | { |
| 339 | #endif |
| 340 | fclose(desctable[stream-1]); |
| 341 | desctable[stream-1]=0; |
| 342 | #ifdef ZLIB |
| 343 | } |
| 344 | #endif |
| 345 | return 1; |
| 346 | } |
| 347 | |
| 348 | size_t FASTAPASS(3) FCEU_fread(void *ptr, size_t size, size_t nmemb, int stream) |
| 349 | { |
| 350 | #ifdef ZLIB |
| 351 | if(stream&0x4000) |
| 352 | { |
| 353 | return gzread(desctable[(stream&255)-1],ptr,size*nmemb); |
| 354 | } |
| 355 | else if(stream&0x8000) |
| 356 | { |
| 357 | ZIPWRAP *wz; |
| 358 | uint32 total=size*nmemb; |
| 359 | |
| 360 | wz=(ZIPWRAP*)desctable[(stream&255)-1]; |
| 361 | if(wz->location>=wz->size) return 0; |
| 362 | |
| 363 | if((wz->location+total)>wz->size) |
| 364 | { |
| 365 | int ak=wz->size-wz->location; |
| 366 | memcpy((uint8*)ptr,wz->data+wz->location,ak); |
| 367 | wz->location=wz->size; |
| 368 | return(ak/size); |
| 369 | } |
| 370 | else |
| 371 | { |
| 372 | memcpy((uint8*)ptr,wz->data+wz->location,total); |
| 373 | wz->location+=total; |
| 374 | return nmemb; |
| 375 | } |
| 376 | } |
| 377 | else |
| 378 | { |
| 379 | #endif |
| 380 | return fread(ptr,size,nmemb,desctable[stream-1]); |
| 381 | #ifdef ZLIB |
| 382 | } |
| 383 | #endif |
| 384 | } |
| 385 | |
| 386 | size_t FASTAPASS(3) FCEU_fwrite(void *ptr, size_t size, size_t nmemb, int stream) |
| 387 | { |
| 388 | #ifdef ZLIB |
| 389 | if(stream&0x4000) |
| 390 | { |
| 391 | return gzwrite(desctable[(stream&255)-1],ptr,size*nmemb); |
| 392 | } |
| 393 | else if(stream&0x8000) |
| 394 | { |
| 395 | return 0; |
| 396 | } |
| 397 | else |
| 398 | #endif |
| 399 | return fwrite(ptr,size,nmemb,desctable[stream-1]); |
| 400 | } |
| 401 | |
| 402 | int FASTAPASS(3) FCEU_fseek(int stream, long offset, int whence) |
| 403 | { |
| 404 | #ifdef ZLIB |
| 405 | if(stream&0x4000) |
| 406 | { |
| 407 | return gzseek(desctable[(stream&255)-1],offset,whence); |
| 408 | } |
| 409 | else if(stream&0x8000) |
| 410 | { |
| 411 | ZIPWRAP *wz; |
| 412 | wz=(ZIPWRAP*)desctable[(stream&255)-1]; |
| 413 | |
| 414 | switch(whence) |
| 415 | { |
| 416 | case SEEK_SET:if(offset>=wz->size) |
| 417 | return(-1); |
| 418 | wz->location=offset;break; |
| 419 | case SEEK_CUR:if(offset+wz->location>wz->size) |
| 420 | return (-1); |
| 421 | wz->location+=offset; |
| 422 | break; |
| 423 | } |
| 424 | return 0; |
| 425 | } |
| 426 | else |
| 427 | #endif |
| 428 | return fseek(desctable[stream-1],offset,whence); |
| 429 | } |
| 430 | |
| 431 | long FASTAPASS(1) FCEU_ftell(int stream) |
| 432 | { |
| 433 | #ifdef ZLIB |
| 434 | if(stream&0x4000) |
| 435 | { |
| 436 | return gztell(desctable[(stream&255)-1]); |
| 437 | } |
| 438 | else if(stream&0x8000) |
| 439 | { |
| 440 | return (((ZIPWRAP *)desctable[(stream&255)-1])->location); |
| 441 | } |
| 442 | else |
| 443 | #endif |
| 444 | return ftell(desctable[stream-1]); |
| 445 | } |
| 446 | |
| 447 | void FASTAPASS(1)FCEU_rewind(int stream) |
| 448 | { |
| 449 | #ifdef ZLIB |
| 450 | if(stream&0x4000) |
| 451 | { |
| 452 | gzrewind(desctable[(stream&255)-1]); |
| 453 | } |
| 454 | else if(stream&0x8000) |
| 455 | { |
| 456 | ((ZIPWRAP *)desctable[(stream&255)-1])->location=0; |
| 457 | } |
| 458 | else |
| 459 | #endif |
| 460 | #ifdef _WIN32_WCE |
| 461 | fseek(desctable[stream-1],0,SEEK_SET); |
| 462 | #else |
| 463 | rewind(desctable[stream-1]); |
| 464 | #endif |
| 465 | } |
| 466 | |
| 467 | int FASTAPASS(2) FCEU_read32(void *Bufo, int stream) |
| 468 | { |
| 469 | #ifdef ZLIB |
| 470 | if(stream&0xC000) |
| 471 | { |
| 472 | uint32 t; |
| 473 | #ifndef LSB_FIRST |
| 474 | uint8 x[4]; |
| 475 | #endif |
| 476 | if(stream&0x8000) |
| 477 | { |
| 478 | ZIPWRAP *wz; |
| 479 | wz=(ZIPWRAP*)desctable[(stream&255)-1]; |
| 480 | if(wz->location+4>wz->size) |
| 481 | {return 0;} |
| 482 | memcpy(&t, wz->data+wz->location, 4); |
| 483 | wz->location+=4; |
| 484 | } |
| 485 | else if(stream&0x4000) |
| 486 | gzread(desctable[(stream&255)-1],&t,4); |
| 487 | #ifndef LSB_FIRST |
| 488 | x[0]=t[3]; |
| 489 | x[1]=t[2]; |
| 490 | x[2]=t[1]; |
| 491 | x[3]=t[0]; |
| 492 | *(uint32*)Bufo=*(uint32*)x; |
| 493 | #else |
| 494 | memcpy(Bufo, &t, 4); |
| 495 | #endif |
| 496 | return 1; |
| 497 | } |
| 498 | else |
| 499 | #endif |
| 500 | { |
| 501 | return read32(Bufo,desctable[stream-1]); |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | int FASTAPASS(1) FCEU_fgetc(int stream) |
| 506 | { |
| 507 | #ifdef ZLIB |
| 508 | if(stream&0x4000) |
| 509 | return gzgetc(desctable[(stream&255)-1]); |
| 510 | else if(stream&0x8000) |
| 511 | { |
| 512 | ZIPWRAP *wz; |
| 513 | wz=(ZIPWRAP*)desctable[(stream&255)-1]; |
| 514 | if(wz->location<wz->size) |
| 515 | return wz->data[wz->location++]; |
| 516 | return EOF; |
| 517 | } |
| 518 | else |
| 519 | #endif |
| 520 | return fgetc(desctable[stream-1]); |
| 521 | } |
| 522 | |
| 523 | long FASTAPASS(1) FCEU_fgetsize(int stream) |
| 524 | { |
| 525 | #ifdef ZLIB |
| 526 | if(stream&0x4000) |
| 527 | { |
| 528 | int x,t; |
| 529 | t=gztell(desctable[(stream&255)-1]); |
| 530 | gzrewind(desctable[(stream&255)-1]); |
| 531 | for(x=0;gzgetc(desctable[(stream&255)-1]) != EOF; x++); |
| 532 | gzseek(desctable[(stream&255)-1],t,SEEK_SET); |
| 533 | return(x); |
| 534 | } |
| 535 | else if(stream&0x8000) |
| 536 | return ((ZIPWRAP*)desctable[(stream&255)-1])->size; |
| 537 | else |
| 538 | #endif |
| 539 | { |
| 540 | long t,r; |
| 541 | t=ftell(desctable[stream-1]); |
| 542 | fseek(desctable[stream-1],0,SEEK_END); |
| 543 | r=ftell(desctable[stream-1]); |
| 544 | fseek(desctable[stream-1],t,SEEK_SET); |
| 545 | return r; |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | int FASTAPASS(1) FCEU_fisarchive(int stream) |
| 550 | { |
| 551 | #ifdef ZLIB |
| 552 | if(stream&0x8000) |
| 553 | return 1; |
| 554 | #endif |
| 555 | return 0; |
| 556 | } |