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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)); | |
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]; | |
13fab97c | 186 | char szPPF[MAXPATHLEN * 2]; |
ef79bbde P |
187 | int count, seekpos, pos; |
188 | u32 anz; // use 32-bit to avoid stupid overflows | |
189 | s32 ladr, off, anx; | |
190 | ||
191 | FreePPFCache(); | |
192 | ||
4e44d6f6 | 193 | if (CdromId[0] == '\0') return; |
194 | ||
ef79bbde P |
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); | |
5b568098 | 215 | if (fread(buffer, 1, 3, ppffile) != 3) |
9361a5aa | 216 | goto fail_io; |
ef79bbde P |
217 | |
218 | if (strcmp(buffer, "PPF") != 0) { | |
219 | SysPrintf(_("Invalid PPF patch: %s.\n"), szPPF); | |
220 | fclose(ppffile); | |
221 | return; | |
222 | } | |
223 | ||
224 | fseek(ppffile, 5, SEEK_SET); | |
225 | method = fgetc(ppffile); | |
226 | ||
227 | switch (method) { | |
228 | case 0: // ppf1 | |
229 | fseek(ppffile, 0, SEEK_END); | |
230 | count = ftell(ppffile); | |
231 | count -= 56; | |
232 | seekpos = 56; | |
233 | break; | |
234 | ||
235 | case 1: // ppf2 | |
236 | fseek(ppffile, -8, SEEK_END); | |
237 | ||
238 | memset(buffer, 0, 5); | |
5b568098 | 239 | if (fread(buffer, 1, 4, ppffile) != 4) |
9361a5aa | 240 | goto fail_io; |
ef79bbde P |
241 | |
242 | if (strcmp(".DIZ", buffer) != 0) { | |
243 | dizyn = 0; | |
244 | } else { | |
5b568098 | 245 | if (fread(&dizlen, 1, 4, ppffile) != 4) |
9361a5aa | 246 | goto fail_io; |
ef79bbde P |
247 | dizlen = SWAP32(dizlen); |
248 | dizyn = 1; | |
249 | } | |
250 | ||
251 | fseek(ppffile, 0, SEEK_END); | |
252 | count = ftell(ppffile); | |
253 | ||
254 | if (dizyn == 0) { | |
255 | count -= 1084; | |
256 | seekpos = 1084; | |
257 | } else { | |
258 | count -= 1084; | |
259 | count -= 38; | |
260 | count -= dizlen; | |
261 | seekpos = 1084; | |
262 | } | |
263 | break; | |
264 | ||
265 | case 2: // ppf3 | |
266 | fseek(ppffile, 57, SEEK_SET); | |
267 | blockcheck = fgetc(ppffile); | |
268 | undo = fgetc(ppffile); | |
269 | ||
270 | fseek(ppffile, -6, SEEK_END); | |
271 | memset(buffer, 0, 5); | |
5b568098 | 272 | if (fread(buffer, 1, 4, ppffile) != 4) |
9361a5aa | 273 | goto fail_io; |
ef79bbde P |
274 | dizlen = 0; |
275 | ||
276 | if (strcmp(".DIZ", buffer) == 0) { | |
277 | fseek(ppffile, -2, SEEK_END); | |
9361a5aa | 278 | // TODO: Endian/size unsafe? |
5b568098 | 279 | if (fread(&dizlen, 1, 2, ppffile) != 2) |
9361a5aa | 280 | goto fail_io; |
ef79bbde P |
281 | dizlen = SWAP32(dizlen); |
282 | dizlen += 36; | |
283 | } | |
284 | ||
285 | fseek(ppffile, 0, SEEK_END); | |
286 | count = ftell(ppffile); | |
287 | count -= dizlen; | |
288 | ||
289 | if (blockcheck) { | |
290 | seekpos = 1084; | |
291 | count -= 1084; | |
292 | } else { | |
293 | seekpos = 60; | |
294 | count -= 60; | |
295 | } | |
296 | break; | |
297 | ||
298 | default: | |
299 | fclose(ppffile); | |
300 | SysPrintf(_("Unsupported PPF version (%d).\n"), method + 1); | |
301 | return; | |
302 | } | |
303 | ||
304 | // now do the data reading | |
305 | do { | |
306 | fseek(ppffile, seekpos, SEEK_SET); | |
5b568098 | 307 | if (fread(&pos, 1, sizeof(pos), ppffile) != sizeof(pos)) |
9361a5aa | 308 | goto fail_io; |
ef79bbde P |
309 | pos = SWAP32(pos); |
310 | ||
9361a5aa EC |
311 | if (method == 2) { |
312 | // skip 4 bytes on ppf3 (no int64 support here) | |
5b568098 | 313 | if (fread(buffer, 1, 4, ppffile) != 4) |
9361a5aa EC |
314 | goto fail_io; |
315 | } | |
ef79bbde P |
316 | |
317 | anz = fgetc(ppffile); | |
5b568098 | 318 | if (fread(ppfmem, 1, anz, ppffile) != anz) |
9361a5aa | 319 | goto fail_io; |
ef79bbde P |
320 | |
321 | ladr = pos / CD_FRAMESIZE_RAW; | |
322 | off = pos % CD_FRAMESIZE_RAW; | |
323 | ||
324 | if (off + anz > CD_FRAMESIZE_RAW) { | |
325 | anx = off + anz - CD_FRAMESIZE_RAW; | |
326 | anz -= (unsigned char)anx; | |
327 | AddToPPF(ladr + 1, 0, anx, &ppfmem[anz]); | |
328 | } | |
329 | ||
330 | AddToPPF(ladr, off, anz, ppfmem); // add to link list | |
331 | ||
332 | if (method == 2) { | |
333 | if (undo) anz += anz; | |
334 | anz += 4; | |
335 | } | |
336 | ||
337 | seekpos = seekpos + 5 + anz; | |
338 | count = count - 5 - anz; | |
339 | } while (count != 0); // loop til end | |
340 | ||
341 | fclose(ppffile); | |
342 | ||
343 | FillPPFCache(); // build address array | |
344 | ||
345 | SysPrintf(_("Loaded PPF %d.0 patch: %s.\n"), method + 1, szPPF); | |
9361a5aa EC |
346 | |
347 | fail_io: | |
348 | #ifndef NDEBUG | |
349 | SysPrintf(_("File IO error in <%s:%s>.\n"), __FILE__, __func__); | |
350 | #endif | |
351 | fclose(ppffile); | |
ef79bbde | 352 | } |
ae4e7dc9 | 353 | |
354 | // redump.org SBI files, slightly different handling from PCSX-Reloaded | |
355 | unsigned char *sbi_sectors; | |
356 | ||
357 | int LoadSBI(const char *fname, int sector_count) { | |
4ae294f0 | 358 | int good_sectors = 0; |
359 | int clean_eof = 0; | |
ab948f7e | 360 | char buffer[16]; |
ae4e7dc9 | 361 | FILE *sbihandle; |
eaa895dc | 362 | u8 sbitime[3], t; |
ae4e7dc9 | 363 | int s; |
364 | ||
365 | sbihandle = fopen(fname, "rb"); | |
366 | if (sbihandle == NULL) | |
367 | return -1; | |
368 | ||
ae4e7dc9 | 369 | sbi_sectors = calloc(1, sector_count / 8); |
4ae294f0 | 370 | if (sbi_sectors == NULL) |
371 | goto end; | |
ae4e7dc9 | 372 | |
373 | // 4-byte SBI header | |
9361a5aa | 374 | if (fread(buffer, 1, 4, sbihandle) != 4) |
4ae294f0 | 375 | goto end; |
9361a5aa | 376 | |
eaa895dc | 377 | while (1) { |
378 | s = fread(sbitime, 1, 3, sbihandle); | |
379 | if (s != 3) | |
4ae294f0 | 380 | { |
381 | if (s == 0) | |
382 | clean_eof = 1; | |
383 | break; | |
384 | } | |
385 | s = MSF2SECT(btoi(sbitime[0]), btoi(sbitime[1]), btoi(sbitime[2])); | |
386 | if (s < sector_count) { | |
387 | sbi_sectors[s >> 3] |= 1 << (s&7); | |
388 | good_sectors++; | |
389 | } | |
390 | else | |
391 | SysPrintf(_("SBI sector %d >= %d?\n"), s, sector_count); | |
392 | ||
393 | // skip to the next record | |
5b568098 | 394 | if (fread(&t, 1, sizeof(t), sbihandle) != sizeof(t)) |
4ae294f0 | 395 | break; |
396 | s = -1; | |
eaa895dc | 397 | switch (t) { |
398 | default: | |
399 | case 1: | |
400 | s = 10; | |
401 | break; | |
402 | case 2: | |
403 | case 3: | |
404 | s = 3; | |
405 | break; | |
406 | } | |
4ae294f0 | 407 | if (s < 0) |
408 | break; | |
409 | if (fseek(sbihandle, s, SEEK_CUR)) | |
410 | break; | |
ae4e7dc9 | 411 | } |
412 | ||
413 | fclose(sbihandle); | |
ae4e7dc9 | 414 | return 0; |
9361a5aa | 415 | |
4ae294f0 | 416 | end: |
417 | if (!clean_eof) | |
418 | SysPrintf(_("SBI: parse failure at 0x%lx\n"), ftell(sbihandle)); | |
419 | if (!good_sectors) { | |
420 | free(sbi_sectors); | |
421 | sbi_sectors = NULL; | |
422 | } | |
9361a5aa | 423 | fclose(sbihandle); |
4ae294f0 | 424 | return sbi_sectors ? 0 : -1; |
ae4e7dc9 | 425 | } |
426 | ||
427 | void UnloadSBI(void) { | |
428 | if (sbi_sectors) { | |
429 | free(sbi_sectors); | |
430 | sbi_sectors = NULL; | |
431 | } | |
432 | } |