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ef79bbde P |
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)); | |
ab91a058 | 61 | if (pc == NULL) return; |
ef79bbde P |
62 | |
63 | iPPFNum--; | |
64 | p = ppfHead; | |
65 | lastaddr = -1; | |
66 | ||
67 | while (p != NULL) { | |
68 | if (p->addr != lastaddr) { | |
69 | pc->addr = p->addr; | |
70 | pc->pNext = p; | |
71 | pc++; | |
72 | } | |
73 | lastaddr = p->addr; | |
74 | p = p->pNext; | |
75 | } | |
76 | } | |
77 | ||
78 | void FreePPFCache() { | |
79 | PPF_DATA *p = ppfHead; | |
80 | void *pn; | |
81 | ||
82 | while (p != NULL) { | |
83 | pn = p->pNext; | |
84 | free(p); | |
85 | p = (PPF_DATA *)pn; | |
86 | } | |
87 | ppfHead = NULL; | |
88 | ppfLast = NULL; | |
89 | ||
90 | if (ppfCache != NULL) free(ppfCache); | |
91 | ppfCache = NULL; | |
92 | } | |
93 | ||
94 | void CheckPPFCache(unsigned char *pB, unsigned char m, unsigned char s, unsigned char f) { | |
95 | PPF_CACHE *pcstart, *pcend, *pcpos; | |
96 | int addr = MSF2SECT(btoi(m), btoi(s), btoi(f)), pos, anz, start; | |
97 | ||
98 | if (ppfCache == NULL) return; | |
99 | ||
100 | pcstart = ppfCache; | |
101 | if (addr < pcstart->addr) return; | |
102 | pcend = ppfCache + iPPFNum; | |
103 | if (addr > pcend->addr) return; | |
104 | ||
105 | while (1) { | |
106 | if (addr == pcend->addr) { pcpos = pcend; break; } | |
107 | ||
108 | pcpos = pcstart + (pcend - pcstart) / 2; | |
109 | if (pcpos == pcstart) break; | |
110 | if (addr < pcpos->addr) { | |
111 | pcend = pcpos; | |
112 | continue; | |
113 | } | |
114 | if (addr > pcpos->addr) { | |
115 | pcstart = pcpos; | |
116 | continue; | |
117 | } | |
118 | break; | |
119 | } | |
120 | ||
121 | if (addr == pcpos->addr) { | |
122 | PPF_DATA *p = pcpos->pNext; | |
123 | while (p != NULL && p->addr == addr) { | |
124 | pos = p->pos - (CD_FRAMESIZE_RAW - DATA_SIZE); | |
125 | anz = p->anz; | |
126 | if (pos < 0) { start = -pos; pos = 0; anz -= start; } | |
127 | else start = 0; | |
128 | memcpy(pB + pos, (unsigned char *)(p + 1) + start, anz); | |
129 | p = p->pNext; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | static void AddToPPF(s32 ladr, s32 pos, s32 anz, unsigned char *ppfmem) { | |
135 | if (ppfHead == NULL) { | |
136 | ppfHead = (PPF_DATA *)malloc(sizeof(PPF_DATA) + anz); | |
ab91a058 | 137 | if (ppfHead == NULL) return; |
ef79bbde P |
138 | ppfHead->addr = ladr; |
139 | ppfHead->pNext = NULL; | |
140 | ppfHead->pos = pos; | |
141 | ppfHead->anz = anz; | |
142 | memcpy(ppfHead + 1, ppfmem, anz); | |
143 | iPPFNum = 1; | |
144 | ppfLast = ppfHead; | |
145 | } else { | |
146 | PPF_DATA *p = ppfHead; | |
147 | PPF_DATA *plast = NULL; | |
148 | PPF_DATA *padd; | |
149 | ||
150 | if (ladr > ppfLast->addr || (ladr == ppfLast->addr && pos > ppfLast->pos)) { | |
151 | p = NULL; | |
152 | plast = ppfLast; | |
153 | } else { | |
154 | while (p != NULL) { | |
155 | if (ladr < p->addr) break; | |
156 | if (ladr == p->addr) { | |
157 | while (p && ladr == p->addr && pos > p->pos) { | |
158 | plast = p; | |
159 | p = p->pNext; | |
160 | } | |
161 | break; | |
162 | } | |
163 | plast = p; | |
164 | p = p->pNext; | |
165 | } | |
166 | } | |
167 | ||
168 | padd = (PPF_DATA *)malloc(sizeof(PPF_DATA) + anz); | |
ab91a058 | 169 | if (padd == NULL) return; |
ef79bbde P |
170 | padd->addr = ladr; |
171 | padd->pNext = p; | |
172 | padd->pos = pos; | |
173 | padd->anz = anz; | |
174 | memcpy(padd + 1, ppfmem, anz); | |
175 | iPPFNum++; | |
176 | if (plast == NULL) ppfHead = padd; | |
177 | else plast->pNext = padd; | |
178 | ||
179 | if (padd->pNext == NULL) ppfLast = padd; | |
180 | } | |
181 | } | |
182 | ||
183 | void BuildPPFCache() { | |
184 | FILE *ppffile; | |
185 | char buffer[12]; | |
186 | char method, undo = 0, blockcheck = 0; | |
187 | int dizlen, dizyn; | |
188 | unsigned char ppfmem[512]; | |
13fab97c | 189 | char szPPF[MAXPATHLEN * 2]; |
ef79bbde P |
190 | int count, seekpos, pos; |
191 | u32 anz; // use 32-bit to avoid stupid overflows | |
192 | s32 ladr, off, anx; | |
193 | ||
194 | FreePPFCache(); | |
195 | ||
4e44d6f6 | 196 | if (CdromId[0] == '\0') return; |
197 | ||
ef79bbde P |
198 | // Generate filename in the format of SLUS_123.45 |
199 | buffer[0] = toupper(CdromId[0]); | |
200 | buffer[1] = toupper(CdromId[1]); | |
201 | buffer[2] = toupper(CdromId[2]); | |
202 | buffer[3] = toupper(CdromId[3]); | |
203 | buffer[4] = '_'; | |
204 | buffer[5] = CdromId[4]; | |
205 | buffer[6] = CdromId[5]; | |
206 | buffer[7] = CdromId[6]; | |
207 | buffer[8] = '.'; | |
208 | buffer[9] = CdromId[7]; | |
209 | buffer[10] = CdromId[8]; | |
210 | buffer[11] = '\0'; | |
211 | ||
212 | sprintf(szPPF, "%s%s", Config.PatchesDir, buffer); | |
213 | ||
214 | ppffile = fopen(szPPF, "rb"); | |
215 | if (ppffile == NULL) return; | |
216 | ||
217 | memset(buffer, 0, 5); | |
5b568098 | 218 | if (fread(buffer, 1, 3, ppffile) != 3) |
9361a5aa | 219 | goto fail_io; |
ef79bbde P |
220 | |
221 | if (strcmp(buffer, "PPF") != 0) { | |
222 | SysPrintf(_("Invalid PPF patch: %s.\n"), szPPF); | |
223 | fclose(ppffile); | |
224 | return; | |
225 | } | |
226 | ||
227 | fseek(ppffile, 5, SEEK_SET); | |
228 | method = fgetc(ppffile); | |
229 | ||
230 | switch (method) { | |
231 | case 0: // ppf1 | |
232 | fseek(ppffile, 0, SEEK_END); | |
233 | count = ftell(ppffile); | |
234 | count -= 56; | |
235 | seekpos = 56; | |
236 | break; | |
237 | ||
238 | case 1: // ppf2 | |
239 | fseek(ppffile, -8, SEEK_END); | |
240 | ||
241 | memset(buffer, 0, 5); | |
5b568098 | 242 | if (fread(buffer, 1, 4, ppffile) != 4) |
9361a5aa | 243 | goto fail_io; |
ef79bbde P |
244 | |
245 | if (strcmp(".DIZ", buffer) != 0) { | |
246 | dizyn = 0; | |
247 | } else { | |
5b568098 | 248 | if (fread(&dizlen, 1, 4, ppffile) != 4) |
9361a5aa | 249 | goto fail_io; |
ef79bbde P |
250 | dizlen = SWAP32(dizlen); |
251 | dizyn = 1; | |
252 | } | |
253 | ||
254 | fseek(ppffile, 0, SEEK_END); | |
255 | count = ftell(ppffile); | |
256 | ||
257 | if (dizyn == 0) { | |
258 | count -= 1084; | |
259 | seekpos = 1084; | |
260 | } else { | |
261 | count -= 1084; | |
262 | count -= 38; | |
263 | count -= dizlen; | |
264 | seekpos = 1084; | |
265 | } | |
266 | break; | |
267 | ||
268 | case 2: // ppf3 | |
269 | fseek(ppffile, 57, SEEK_SET); | |
270 | blockcheck = fgetc(ppffile); | |
271 | undo = fgetc(ppffile); | |
272 | ||
273 | fseek(ppffile, -6, SEEK_END); | |
274 | memset(buffer, 0, 5); | |
5b568098 | 275 | if (fread(buffer, 1, 4, ppffile) != 4) |
9361a5aa | 276 | goto fail_io; |
ef79bbde P |
277 | dizlen = 0; |
278 | ||
279 | if (strcmp(".DIZ", buffer) == 0) { | |
280 | fseek(ppffile, -2, SEEK_END); | |
9361a5aa | 281 | // TODO: Endian/size unsafe? |
5b568098 | 282 | if (fread(&dizlen, 1, 2, ppffile) != 2) |
9361a5aa | 283 | goto fail_io; |
ef79bbde P |
284 | dizlen = SWAP32(dizlen); |
285 | dizlen += 36; | |
286 | } | |
287 | ||
288 | fseek(ppffile, 0, SEEK_END); | |
289 | count = ftell(ppffile); | |
290 | count -= dizlen; | |
291 | ||
292 | if (blockcheck) { | |
293 | seekpos = 1084; | |
294 | count -= 1084; | |
295 | } else { | |
296 | seekpos = 60; | |
297 | count -= 60; | |
298 | } | |
299 | break; | |
300 | ||
301 | default: | |
302 | fclose(ppffile); | |
303 | SysPrintf(_("Unsupported PPF version (%d).\n"), method + 1); | |
304 | return; | |
305 | } | |
306 | ||
307 | // now do the data reading | |
308 | do { | |
309 | fseek(ppffile, seekpos, SEEK_SET); | |
5b568098 | 310 | if (fread(&pos, 1, sizeof(pos), ppffile) != sizeof(pos)) |
9361a5aa | 311 | goto fail_io; |
ef79bbde P |
312 | pos = SWAP32(pos); |
313 | ||
9361a5aa EC |
314 | if (method == 2) { |
315 | // skip 4 bytes on ppf3 (no int64 support here) | |
5b568098 | 316 | if (fread(buffer, 1, 4, ppffile) != 4) |
9361a5aa EC |
317 | goto fail_io; |
318 | } | |
ef79bbde P |
319 | |
320 | anz = fgetc(ppffile); | |
5b568098 | 321 | if (fread(ppfmem, 1, anz, ppffile) != anz) |
9361a5aa | 322 | goto fail_io; |
ef79bbde P |
323 | |
324 | ladr = pos / CD_FRAMESIZE_RAW; | |
325 | off = pos % CD_FRAMESIZE_RAW; | |
326 | ||
327 | if (off + anz > CD_FRAMESIZE_RAW) { | |
328 | anx = off + anz - CD_FRAMESIZE_RAW; | |
329 | anz -= (unsigned char)anx; | |
330 | AddToPPF(ladr + 1, 0, anx, &ppfmem[anz]); | |
331 | } | |
332 | ||
333 | AddToPPF(ladr, off, anz, ppfmem); // add to link list | |
334 | ||
335 | if (method == 2) { | |
336 | if (undo) anz += anz; | |
337 | anz += 4; | |
338 | } | |
339 | ||
340 | seekpos = seekpos + 5 + anz; | |
341 | count = count - 5 - anz; | |
342 | } while (count != 0); // loop til end | |
343 | ||
344 | fclose(ppffile); | |
345 | ||
346 | FillPPFCache(); // build address array | |
347 | ||
348 | SysPrintf(_("Loaded PPF %d.0 patch: %s.\n"), method + 1, szPPF); | |
9361a5aa EC |
349 | |
350 | fail_io: | |
351 | #ifndef NDEBUG | |
352 | SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__); | |
353 | #endif | |
354 | fclose(ppffile); | |
ef79bbde | 355 | } |
ae4e7dc9 | 356 | |
357 | // redump.org SBI files, slightly different handling from PCSX-Reloaded | |
358 | unsigned char *sbi_sectors; | |
359 | ||
360 | int LoadSBI(const char *fname, int sector_count) { | |
4ae294f0 | 361 | int good_sectors = 0; |
362 | int clean_eof = 0; | |
ab948f7e | 363 | char buffer[16]; |
ae4e7dc9 | 364 | FILE *sbihandle; |
eaa895dc | 365 | u8 sbitime[3], t; |
ae4e7dc9 | 366 | int s; |
367 | ||
368 | sbihandle = fopen(fname, "rb"); | |
369 | if (sbihandle == NULL) | |
370 | return -1; | |
371 | ||
ae4e7dc9 | 372 | sbi_sectors = calloc(1, sector_count / 8); |
4ae294f0 | 373 | if (sbi_sectors == NULL) |
374 | goto end; | |
ae4e7dc9 | 375 | |
376 | // 4-byte SBI header | |
9361a5aa | 377 | if (fread(buffer, 1, 4, sbihandle) != 4) |
4ae294f0 | 378 | goto end; |
9361a5aa | 379 | |
eaa895dc | 380 | while (1) { |
381 | s = fread(sbitime, 1, 3, sbihandle); | |
382 | if (s != 3) | |
4ae294f0 | 383 | { |
384 | if (s == 0) | |
385 | clean_eof = 1; | |
386 | break; | |
387 | } | |
388 | s = MSF2SECT(btoi(sbitime[0]), btoi(sbitime[1]), btoi(sbitime[2])); | |
389 | if (s < sector_count) { | |
390 | sbi_sectors[s >> 3] |= 1 << (s&7); | |
391 | good_sectors++; | |
392 | } | |
393 | else | |
394 | SysPrintf(_("SBI sector %d >= %d?\n"), s, sector_count); | |
395 | ||
396 | // skip to the next record | |
5b568098 | 397 | if (fread(&t, 1, sizeof(t), sbihandle) != sizeof(t)) |
4ae294f0 | 398 | break; |
399 | s = -1; | |
eaa895dc | 400 | switch (t) { |
401 | default: | |
402 | case 1: | |
403 | s = 10; | |
404 | break; | |
405 | case 2: | |
406 | case 3: | |
407 | s = 3; | |
408 | break; | |
409 | } | |
4ae294f0 | 410 | if (s < 0) |
411 | break; | |
412 | if (fseek(sbihandle, s, SEEK_CUR)) | |
413 | break; | |
ae4e7dc9 | 414 | } |
415 | ||
416 | fclose(sbihandle); | |
ae4e7dc9 | 417 | return 0; |
9361a5aa | 418 | |
4ae294f0 | 419 | end: |
420 | if (!clean_eof) | |
421 | SysPrintf(_("SBI: parse failure at 0x%lx\n"), ftell(sbihandle)); | |
422 | if (!good_sectors) { | |
423 | free(sbi_sectors); | |
424 | sbi_sectors = NULL; | |
425 | } | |
9361a5aa | 426 | fclose(sbihandle); |
4ae294f0 | 427 | return sbi_sectors ? 0 : -1; |
ae4e7dc9 | 428 | } |
429 | ||
430 | void UnloadSBI(void) { | |
431 | if (sbi_sectors) { | |
432 | free(sbi_sectors); | |
433 | sbi_sectors = NULL; | |
434 | } | |
435 | } |