| 1 | /* PPF Patch Support for PCSX-Reloaded |
| 2 | * Copyright (c) 2009, Wei Mingzhi <whistler_wmz@users.sf.net>. |
| 3 | * |
| 4 | * Based on P.E.Op.S CDR Plugin by Pete Bernert. |
| 5 | * Copyright (c) 2002, Pete Bernert. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include "psxcommon.h" |
| 23 | #include "ppf.h" |
| 24 | #include "cdrom.h" |
| 25 | |
| 26 | typedef struct tagPPF_DATA { |
| 27 | s32 addr; |
| 28 | s32 pos; |
| 29 | s32 anz; |
| 30 | struct tagPPF_DATA *pNext; |
| 31 | } PPF_DATA; |
| 32 | |
| 33 | typedef struct tagPPF_CACHE { |
| 34 | s32 addr; |
| 35 | struct tagPPF_DATA *pNext; |
| 36 | } PPF_CACHE; |
| 37 | |
| 38 | static PPF_CACHE *ppfCache = NULL; |
| 39 | static PPF_DATA *ppfHead = NULL, *ppfLast = NULL; |
| 40 | static int iPPFNum = 0; |
| 41 | |
| 42 | // using a linked data list, and address array |
| 43 | static void FillPPFCache() { |
| 44 | PPF_DATA *p; |
| 45 | PPF_CACHE *pc; |
| 46 | s32 lastaddr; |
| 47 | |
| 48 | p = ppfHead; |
| 49 | lastaddr = -1; |
| 50 | iPPFNum = 0; |
| 51 | |
| 52 | while (p != NULL) { |
| 53 | if (p->addr != lastaddr) iPPFNum++; |
| 54 | lastaddr = p->addr; |
| 55 | p = p->pNext; |
| 56 | } |
| 57 | |
| 58 | if (iPPFNum <= 0) return; |
| 59 | |
| 60 | pc = ppfCache = (PPF_CACHE *)malloc(iPPFNum * sizeof(PPF_CACHE)); |
| 61 | |
| 62 | iPPFNum--; |
| 63 | p = ppfHead; |
| 64 | lastaddr = -1; |
| 65 | |
| 66 | while (p != NULL) { |
| 67 | if (p->addr != lastaddr) { |
| 68 | pc->addr = p->addr; |
| 69 | pc->pNext = p; |
| 70 | pc++; |
| 71 | } |
| 72 | lastaddr = p->addr; |
| 73 | p = p->pNext; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | void FreePPFCache() { |
| 78 | PPF_DATA *p = ppfHead; |
| 79 | void *pn; |
| 80 | |
| 81 | while (p != NULL) { |
| 82 | pn = p->pNext; |
| 83 | free(p); |
| 84 | p = (PPF_DATA *)pn; |
| 85 | } |
| 86 | ppfHead = NULL; |
| 87 | ppfLast = NULL; |
| 88 | |
| 89 | if (ppfCache != NULL) free(ppfCache); |
| 90 | ppfCache = NULL; |
| 91 | } |
| 92 | |
| 93 | void CheckPPFCache(unsigned char *pB, unsigned char m, unsigned char s, unsigned char f) { |
| 94 | PPF_CACHE *pcstart, *pcend, *pcpos; |
| 95 | int addr = MSF2SECT(btoi(m), btoi(s), btoi(f)), pos, anz, start; |
| 96 | |
| 97 | if (ppfCache == NULL) return; |
| 98 | |
| 99 | pcstart = ppfCache; |
| 100 | if (addr < pcstart->addr) return; |
| 101 | pcend = ppfCache + iPPFNum; |
| 102 | if (addr > pcend->addr) return; |
| 103 | |
| 104 | while (1) { |
| 105 | if (addr == pcend->addr) { pcpos = pcend; break; } |
| 106 | |
| 107 | pcpos = pcstart + (pcend - pcstart) / 2; |
| 108 | if (pcpos == pcstart) break; |
| 109 | if (addr < pcpos->addr) { |
| 110 | pcend = pcpos; |
| 111 | continue; |
| 112 | } |
| 113 | if (addr > pcpos->addr) { |
| 114 | pcstart = pcpos; |
| 115 | continue; |
| 116 | } |
| 117 | break; |
| 118 | } |
| 119 | |
| 120 | if (addr == pcpos->addr) { |
| 121 | PPF_DATA *p = pcpos->pNext; |
| 122 | while (p != NULL && p->addr == addr) { |
| 123 | pos = p->pos - (CD_FRAMESIZE_RAW - DATA_SIZE); |
| 124 | anz = p->anz; |
| 125 | if (pos < 0) { start = -pos; pos = 0; anz -= start; } |
| 126 | else start = 0; |
| 127 | memcpy(pB + pos, (unsigned char *)(p + 1) + start, anz); |
| 128 | p = p->pNext; |
| 129 | } |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | static void AddToPPF(s32 ladr, s32 pos, s32 anz, unsigned char *ppfmem) { |
| 134 | if (ppfHead == NULL) { |
| 135 | ppfHead = (PPF_DATA *)malloc(sizeof(PPF_DATA) + anz); |
| 136 | ppfHead->addr = ladr; |
| 137 | ppfHead->pNext = NULL; |
| 138 | ppfHead->pos = pos; |
| 139 | ppfHead->anz = anz; |
| 140 | memcpy(ppfHead + 1, ppfmem, anz); |
| 141 | iPPFNum = 1; |
| 142 | ppfLast = ppfHead; |
| 143 | } else { |
| 144 | PPF_DATA *p = ppfHead; |
| 145 | PPF_DATA *plast = NULL; |
| 146 | PPF_DATA *padd; |
| 147 | |
| 148 | if (ladr > ppfLast->addr || (ladr == ppfLast->addr && pos > ppfLast->pos)) { |
| 149 | p = NULL; |
| 150 | plast = ppfLast; |
| 151 | } else { |
| 152 | while (p != NULL) { |
| 153 | if (ladr < p->addr) break; |
| 154 | if (ladr == p->addr) { |
| 155 | while (p && ladr == p->addr && pos > p->pos) { |
| 156 | plast = p; |
| 157 | p = p->pNext; |
| 158 | } |
| 159 | break; |
| 160 | } |
| 161 | plast = p; |
| 162 | p = p->pNext; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | padd = (PPF_DATA *)malloc(sizeof(PPF_DATA) + anz); |
| 167 | padd->addr = ladr; |
| 168 | padd->pNext = p; |
| 169 | padd->pos = pos; |
| 170 | padd->anz = anz; |
| 171 | memcpy(padd + 1, ppfmem, anz); |
| 172 | iPPFNum++; |
| 173 | if (plast == NULL) ppfHead = padd; |
| 174 | else plast->pNext = padd; |
| 175 | |
| 176 | if (padd->pNext == NULL) ppfLast = padd; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | void BuildPPFCache() { |
| 181 | FILE *ppffile; |
| 182 | char buffer[12]; |
| 183 | char method, undo = 0, blockcheck = 0; |
| 184 | int dizlen, dizyn; |
| 185 | unsigned char ppfmem[512]; |
| 186 | char szPPF[MAXPATHLEN * 2]; |
| 187 | int count, seekpos, pos; |
| 188 | u32 anz; // use 32-bit to avoid stupid overflows |
| 189 | s32 ladr, off, anx; |
| 190 | |
| 191 | FreePPFCache(); |
| 192 | |
| 193 | if (CdromId[0] == '\0') return; |
| 194 | |
| 195 | // Generate filename in the format of SLUS_123.45 |
| 196 | buffer[0] = toupper(CdromId[0]); |
| 197 | buffer[1] = toupper(CdromId[1]); |
| 198 | buffer[2] = toupper(CdromId[2]); |
| 199 | buffer[3] = toupper(CdromId[3]); |
| 200 | buffer[4] = '_'; |
| 201 | buffer[5] = CdromId[4]; |
| 202 | buffer[6] = CdromId[5]; |
| 203 | buffer[7] = CdromId[6]; |
| 204 | buffer[8] = '.'; |
| 205 | buffer[9] = CdromId[7]; |
| 206 | buffer[10] = CdromId[8]; |
| 207 | buffer[11] = '\0'; |
| 208 | |
| 209 | sprintf(szPPF, "%s%s", Config.PatchesDir, buffer); |
| 210 | |
| 211 | ppffile = fopen(szPPF, "rb"); |
| 212 | if (ppffile == NULL) return; |
| 213 | |
| 214 | memset(buffer, 0, 5); |
| 215 | fread(buffer, 3, 1, ppffile); |
| 216 | |
| 217 | if (strcmp(buffer, "PPF") != 0) { |
| 218 | SysPrintf(_("Invalid PPF patch: %s.\n"), szPPF); |
| 219 | fclose(ppffile); |
| 220 | return; |
| 221 | } |
| 222 | |
| 223 | fseek(ppffile, 5, SEEK_SET); |
| 224 | method = fgetc(ppffile); |
| 225 | |
| 226 | switch (method) { |
| 227 | case 0: // ppf1 |
| 228 | fseek(ppffile, 0, SEEK_END); |
| 229 | count = ftell(ppffile); |
| 230 | count -= 56; |
| 231 | seekpos = 56; |
| 232 | break; |
| 233 | |
| 234 | case 1: // ppf2 |
| 235 | fseek(ppffile, -8, SEEK_END); |
| 236 | |
| 237 | memset(buffer, 0, 5); |
| 238 | fread(buffer, 4, 1, ppffile); |
| 239 | |
| 240 | if (strcmp(".DIZ", buffer) != 0) { |
| 241 | dizyn = 0; |
| 242 | } else { |
| 243 | fread(&dizlen, 4, 1, ppffile); |
| 244 | dizlen = SWAP32(dizlen); |
| 245 | dizyn = 1; |
| 246 | } |
| 247 | |
| 248 | fseek(ppffile, 0, SEEK_END); |
| 249 | count = ftell(ppffile); |
| 250 | |
| 251 | if (dizyn == 0) { |
| 252 | count -= 1084; |
| 253 | seekpos = 1084; |
| 254 | } else { |
| 255 | count -= 1084; |
| 256 | count -= 38; |
| 257 | count -= dizlen; |
| 258 | seekpos = 1084; |
| 259 | } |
| 260 | break; |
| 261 | |
| 262 | case 2: // ppf3 |
| 263 | fseek(ppffile, 57, SEEK_SET); |
| 264 | blockcheck = fgetc(ppffile); |
| 265 | undo = fgetc(ppffile); |
| 266 | |
| 267 | fseek(ppffile, -6, SEEK_END); |
| 268 | memset(buffer, 0, 5); |
| 269 | fread(buffer, 4, 1, ppffile); |
| 270 | dizlen = 0; |
| 271 | |
| 272 | if (strcmp(".DIZ", buffer) == 0) { |
| 273 | fseek(ppffile, -2, SEEK_END); |
| 274 | fread(&dizlen, 2, 1, ppffile); |
| 275 | dizlen = SWAP32(dizlen); |
| 276 | dizlen += 36; |
| 277 | } |
| 278 | |
| 279 | fseek(ppffile, 0, SEEK_END); |
| 280 | count = ftell(ppffile); |
| 281 | count -= dizlen; |
| 282 | |
| 283 | if (blockcheck) { |
| 284 | seekpos = 1084; |
| 285 | count -= 1084; |
| 286 | } else { |
| 287 | seekpos = 60; |
| 288 | count -= 60; |
| 289 | } |
| 290 | break; |
| 291 | |
| 292 | default: |
| 293 | fclose(ppffile); |
| 294 | SysPrintf(_("Unsupported PPF version (%d).\n"), method + 1); |
| 295 | return; |
| 296 | } |
| 297 | |
| 298 | // now do the data reading |
| 299 | do { |
| 300 | fseek(ppffile, seekpos, SEEK_SET); |
| 301 | fread(&pos, 4, 1, ppffile); |
| 302 | pos = SWAP32(pos); |
| 303 | |
| 304 | if (method == 2) fread(buffer, 4, 1, ppffile); // skip 4 bytes on ppf3 (no int64 support here) |
| 305 | |
| 306 | anz = fgetc(ppffile); |
| 307 | fread(ppfmem, anz, 1, ppffile); |
| 308 | |
| 309 | ladr = pos / CD_FRAMESIZE_RAW; |
| 310 | off = pos % CD_FRAMESIZE_RAW; |
| 311 | |
| 312 | if (off + anz > CD_FRAMESIZE_RAW) { |
| 313 | anx = off + anz - CD_FRAMESIZE_RAW; |
| 314 | anz -= (unsigned char)anx; |
| 315 | AddToPPF(ladr + 1, 0, anx, &ppfmem[anz]); |
| 316 | } |
| 317 | |
| 318 | AddToPPF(ladr, off, anz, ppfmem); // add to link list |
| 319 | |
| 320 | if (method == 2) { |
| 321 | if (undo) anz += anz; |
| 322 | anz += 4; |
| 323 | } |
| 324 | |
| 325 | seekpos = seekpos + 5 + anz; |
| 326 | count = count - 5 - anz; |
| 327 | } while (count != 0); // loop til end |
| 328 | |
| 329 | fclose(ppffile); |
| 330 | |
| 331 | FillPPFCache(); // build address array |
| 332 | |
| 333 | SysPrintf(_("Loaded PPF %d.0 patch: %s.\n"), method + 1, szPPF); |
| 334 | } |
| 335 | |
| 336 | // redump.org SBI files, slightly different handling from PCSX-Reloaded |
| 337 | unsigned char *sbi_sectors; |
| 338 | |
| 339 | int LoadSBI(const char *fname, int sector_count) { |
| 340 | char buffer[16]; |
| 341 | FILE *sbihandle; |
| 342 | u8 sbitime[3], t; |
| 343 | int s; |
| 344 | |
| 345 | sbihandle = fopen(fname, "rb"); |
| 346 | if (sbihandle == NULL) |
| 347 | return -1; |
| 348 | |
| 349 | sbi_sectors = calloc(1, sector_count / 8); |
| 350 | if (sbi_sectors == NULL) { |
| 351 | fclose(sbihandle); |
| 352 | return -1; |
| 353 | } |
| 354 | |
| 355 | // 4-byte SBI header |
| 356 | fread(buffer, 1, 4, sbihandle); |
| 357 | while (1) { |
| 358 | s = fread(sbitime, 1, 3, sbihandle); |
| 359 | if (s != 3) |
| 360 | break; |
| 361 | fread(&t, 1, 1, sbihandle); |
| 362 | switch (t) { |
| 363 | default: |
| 364 | case 1: |
| 365 | s = 10; |
| 366 | break; |
| 367 | case 2: |
| 368 | case 3: |
| 369 | s = 3; |
| 370 | break; |
| 371 | } |
| 372 | fseek(sbihandle, s, SEEK_CUR); |
| 373 | |
| 374 | s = MSF2SECT(btoi(sbitime[0]), btoi(sbitime[1]), btoi(sbitime[2])); |
| 375 | if (s < sector_count) |
| 376 | sbi_sectors[s >> 3] |= 1 << (s&7); |
| 377 | else |
| 378 | SysPrintf(_("SBI sector %d >= %d?\n"), s, sector_count); |
| 379 | } |
| 380 | |
| 381 | fclose(sbihandle); |
| 382 | |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | void UnloadSBI(void) { |
| 387 | if (sbi_sectors) { |
| 388 | free(sbi_sectors); |
| 389 | sbi_sectors = NULL; |
| 390 | } |
| 391 | } |