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[picodrive.git] / platform / common / emu.c
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ea8c405f 1// (c) Copyright 2006-2007 notaz, All rights reserved.\r
2// Free for non-commercial use.\r
3\r
4// For commercial use, separate licencing terms must be obtained.\r
5\r
6#include <stdio.h>\r
7#include <stdlib.h>\r
8#include <ctype.h> // tolower\r
9#ifndef NO_SYNC\r
10#include <unistd.h>\r
11#endif\r
12\r
13#include "emu.h"\r
14#include "menu.h"\r
15#include "fonts.h"\r
16#include "lprintf.h"\r
17\r
18#include <Pico/PicoInt.h>\r
19#include <Pico/Patch.h>\r
20#include <zlib/zlib.h>\r
21\r
22#if defined(__GP2X__)\r
23 #include "../gp2x/gp2x.h"\r
24 #define SCREEN_WIDTH 320\r
25 #define SCREEN_BUFFER gp2x_screen\r
26#elif defined(__GIZ__)\r
27 #include "../gizmondo/giz.h"\r
28 #define SCREEN_WIDTH 321\r
29 #define SCREEN_BUFFER giz_screen // ?\r
30#endif\r
31\r
32char *PicoConfigFile = "picoconfig.bin";\r
33currentConfig_t currentConfig;\r
34unsigned char *rom_data = NULL;\r
35char noticeMsg[64];\r
36int state_slot = 0;\r
37int config_slot = 0, config_slot_current = 0;\r
38\r
39unsigned char *movie_data = NULL;\r
40static int movie_size = 0;\r
41\r
42// provided by platform code:\r
43extern char romFileName[];\r
44extern void emu_noticeMsgUpdated(void);\r
45extern void emu_getMainDir(char *dst, int len);\r
46extern void emu_setDefaultConfig(void);\r
47extern void menu_romload_prepare(const char *rom_name);\r
48extern void menu_romload_end(void);\r
49\r
50\r
51// utilities\r
52static void strlwr_(char* string)\r
53{\r
54 while ( (*string++ = (char)tolower(*string)) );\r
55}\r
56\r
57static int try_rfn_cut(void)\r
58{\r
59 FILE *tmp;\r
60 char *p;\r
61\r
62 p = romFileName + strlen(romFileName) - 1;\r
63 for (; p > romFileName; p--)\r
64 if (*p == '.') break;\r
65 *p = 0;\r
66\r
67 if((tmp = fopen(romFileName, "rb"))) {\r
68 fclose(tmp);\r
69 return 1;\r
70 }\r
71 return 0;\r
72}\r
73\r
74static void get_ext(char *file, char *ext)\r
75{\r
76 char *p;\r
77\r
78 p = file + strlen(file) - 4;\r
79 if (p < file) p = file;\r
80 strncpy(ext, p, 4);\r
81 ext[4] = 0;\r
82 strlwr_(ext);\r
83}\r
84\r
85char *biosfiles_us[] = { "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210" };\r
86char *biosfiles_eu[] = { "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210" };\r
87char *biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };\r
88\r
89int emu_findBios(int region, char **bios_file)\r
90{\r
91 static char bios_path[1024];\r
92 int i, count;\r
93 char **files;\r
94 FILE *f = NULL;\r
95\r
96 if (region == 4) { // US\r
97 files = biosfiles_us;\r
98 count = sizeof(biosfiles_us) / sizeof(char *);\r
99 } else if (region == 8) { // EU\r
100 files = biosfiles_eu;\r
101 count = sizeof(biosfiles_eu) / sizeof(char *);\r
102 } else if (region == 1 || region == 2) {\r
103 files = biosfiles_jp;\r
104 count = sizeof(biosfiles_jp) / sizeof(char *);\r
105 } else {\r
106 return 0;\r
107 }\r
108\r
109 for (i = 0; i < count; i++)\r
110 {\r
111 emu_getMainDir(bios_path, sizeof(bios_path));\r
112 strcat(bios_path, files[i]);\r
113 strcat(bios_path, ".bin");\r
114 f = fopen(bios_path, "rb");\r
115 if (f) break;\r
116\r
117 bios_path[strlen(bios_path) - 4] = 0;\r
118 strcat(bios_path, ".zip");\r
119 f = fopen(bios_path, "rb");\r
120 if (f) break;\r
121 }\r
122\r
123 if (f) {\r
124 lprintf("using bios: %s\n", bios_path);\r
125 fclose(f);\r
126 if (bios_file) *bios_file = bios_path;\r
127 return 1;\r
128 } else {\r
129 sprintf(menuErrorMsg, "no %s BIOS files found, read docs",\r
130 region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
131 lprintf("%s\n", menuErrorMsg);\r
132 return 0;\r
133 }\r
134}\r
135\r
136/* checks if romFileName points to valid MegaCD image\r
137 * if so, checks for suitable BIOS */\r
138int emu_cdCheck(int *pregion)\r
139{\r
140 unsigned char buf[32];\r
141 pm_file *cd_f;\r
142 int type = 0, region = 4; // 1: Japan, 4: US, 8: Europe\r
143\r
144 cd_f = pm_open(romFileName);\r
145 if (!cd_f) return 0; // let the upper level handle this\r
146\r
147 if (pm_read(buf, 32, cd_f) != 32) {\r
148 pm_close(cd_f);\r
149 return 0;\r
150 }\r
151\r
152 if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x00, 14)) type = 1; // Sega CD (ISO)\r
153 if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x10, 14)) type = 2; // Sega CD (BIN)\r
154 if (type == 0) {\r
155 pm_close(cd_f);\r
156 return 0;\r
157 }\r
158\r
159 /* it seems we have a CD image here. Try to detect region now.. */\r
160 pm_seek(cd_f, (type == 1) ? 0x100+0x10B : 0x110+0x10B, SEEK_SET);\r
161 pm_read(buf, 1, cd_f);\r
162 pm_close(cd_f);\r
163\r
164 if (buf[0] == 0x64) region = 8; // EU\r
165 if (buf[0] == 0xa1) region = 1; // JAP\r
166\r
167 lprintf("detected %s Sega/Mega CD image with %s region\n",\r
168 type == 2 ? "BIN" : "ISO", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");\r
169\r
170 if (pregion != NULL) *pregion = region;\r
171\r
172 return type;\r
173}\r
174\r
175int emu_ReloadRom(void)\r
176{\r
177 unsigned int rom_size = 0;\r
178 char *used_rom_name = romFileName;\r
179 char ext[5];\r
180 pm_file *rom;\r
181 int ret, cd_state, cd_region, cfg_loaded = 0;\r
182\r
183 lprintf("emu_ReloadRom(%s)\n", romFileName);\r
184\r
185 get_ext(romFileName, ext);\r
186\r
187 // detect wrong extensions\r
188 if(!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz\r
189 sprintf(menuErrorMsg, "Not a ROM selected.");\r
190 return 0;\r
191 }\r
192\r
193 PicoPatchUnload();\r
194\r
195 // check for movie file\r
196 if(movie_data) {\r
197 free(movie_data);\r
198 movie_data = 0;\r
199 }\r
200 if(!strcmp(ext, ".gmv")) {\r
201 // check for both gmv and rom\r
202 int dummy;\r
203 FILE *movie_file = fopen(romFileName, "rb");\r
204 if(!movie_file) {\r
205 sprintf(menuErrorMsg, "Failed to open movie.");\r
206 return 0;\r
207 }\r
208 fseek(movie_file, 0, SEEK_END);\r
209 movie_size = ftell(movie_file);\r
210 fseek(movie_file, 0, SEEK_SET);\r
211 if(movie_size < 64+3) {\r
212 sprintf(menuErrorMsg, "Invalid GMV file.");\r
213 fclose(movie_file);\r
214 return 0;\r
215 }\r
216 movie_data = malloc(movie_size);\r
217 if(movie_data == NULL) {\r
218 sprintf(menuErrorMsg, "low memory.");\r
219 fclose(movie_file);\r
220 return 0;\r
221 }\r
222 fread(movie_data, 1, movie_size, movie_file);\r
223 fclose(movie_file);\r
224 if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {\r
225 sprintf(menuErrorMsg, "Invalid GMV file.");\r
226 return 0;\r
227 }\r
228 dummy = try_rfn_cut() || try_rfn_cut();\r
229 if (!dummy) {\r
230 sprintf(menuErrorMsg, "Could't find a ROM for movie.");\r
231 return 0;\r
232 }\r
233 get_ext(romFileName, ext);\r
234 }\r
235 else if (!strcmp(ext, ".pat")) {\r
236 int dummy;\r
237 PicoPatchLoad(romFileName);\r
238 dummy = try_rfn_cut() || try_rfn_cut();\r
239 if (!dummy) {\r
240 sprintf(menuErrorMsg, "Could't find a ROM to patch.");\r
241 return 0;\r
242 }\r
243 get_ext(romFileName, ext);\r
244 }\r
245\r
246 if ((PicoMCD & 1) && Pico_mcd != NULL)\r
247 Stop_CD();\r
248\r
249 // check for MegaCD image\r
250 cd_state = emu_cdCheck(&cd_region);\r
251 if (cd_state > 0)\r
252 {\r
253 // valid CD image, check for BIOS..\r
254\r
255 // we need to have config loaded at this point\r
256 ret = emu_ReadConfig(1, 1);\r
257 if (!ret) emu_ReadConfig(0, 1);\r
258 cfg_loaded = 1;\r
259\r
260 if (PicoRegionOverride) {\r
261 cd_region = PicoRegionOverride;\r
262 lprintf("overrided region to %s\n", cd_region != 4 ? (cd_region == 8 ? "EU" : "JAP") : "USA");\r
263 }\r
264 if (!emu_findBios(cd_region, &used_rom_name)) {\r
265 // bios_help() ?\r
266 return 0;\r
267 }\r
268\r
269 PicoMCD |= 1;\r
270 get_ext(used_rom_name, ext);\r
271 }\r
272 else\r
273 {\r
274 if (PicoMCD & 1) Stop_CD();\r
275 PicoMCD &= ~1;\r
276 }\r
277\r
278 rom = pm_open(used_rom_name);\r
279 if(!rom) {\r
280 sprintf(menuErrorMsg, "Failed to open rom.");\r
281 return 0;\r
282 }\r
283\r
284 menu_romload_prepare(used_rom_name);\r
285\r
286 if(rom_data) {\r
287 free(rom_data);\r
288 rom_data = 0;\r
289 rom_size = 0;\r
290 }\r
291\r
292 if( (ret = PicoCartLoad(rom, &rom_data, &rom_size)) ) {\r
293 sprintf(menuErrorMsg, "PicoCartLoad() failed.");\r
294 lprintf("%s\n", menuErrorMsg);\r
295 pm_close(rom);\r
296 menu_romload_end();\r
297 return 0;\r
298 }\r
299 pm_close(rom);\r
300 menu_romload_end();\r
301\r
302 // detect wrong files (Pico crashes on very small files), also see if ROM EP is good\r
303 if(rom_size <= 0x200 || strncmp((char *)rom_data, "Pico", 4) == 0 ||\r
304 ((*(unsigned char *)(rom_data+4)<<16)|(*(unsigned short *)(rom_data+6))) >= (int)rom_size) {\r
305 if (rom_data) free(rom_data);\r
306 rom_data = 0;\r
307 sprintf(menuErrorMsg, "Not a ROM selected.");\r
308 return 0;\r
309 }\r
310\r
311 // load config for this ROM (do this before insert to get correct region)\r
312 if (!cfg_loaded) {\r
313 ret = emu_ReadConfig(1, 1);\r
314 if (!ret) emu_ReadConfig(0, 1);\r
315 }\r
316\r
317 lprintf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);\r
318 if(PicoCartInsert(rom_data, rom_size)) {\r
319 sprintf(menuErrorMsg, "Failed to load ROM.");\r
320 return 0;\r
321 }\r
322\r
323 Pico.m.frame_count = 0;\r
324\r
325 // insert CD if it was detected\r
326 if (cd_state > 0) {\r
327 ret = Insert_CD(romFileName, cd_state == 2);\r
328 if (ret != 0) {\r
329 sprintf(menuErrorMsg, "Insert_CD() failed, invalid CD image?");\r
330 lprintf("%s\n", menuErrorMsg);\r
331 return 0;\r
332 }\r
333 }\r
334\r
335 // emu_ReadConfig() might have messed currentConfig.lastRomFile\r
336 strncpy(currentConfig.lastRomFile, romFileName, sizeof(currentConfig.lastRomFile)-1);\r
337 currentConfig.lastRomFile[sizeof(currentConfig.lastRomFile)-1] = 0;\r
338\r
339 if (PicoPatches) {\r
340 PicoPatchPrepare();\r
341 PicoPatchApply();\r
342 }\r
343\r
344 // additional movie stuff\r
345 if (movie_data) {\r
346 if(movie_data[0x14] == '6')\r
347 PicoOpt |= 0x20; // 6 button pad\r
348 else PicoOpt &= ~0x20;\r
349 PicoOpt |= 0x10040; // accurate timing, no VDP fifo timing\r
350 if(movie_data[0xF] >= 'A') {\r
351 if(movie_data[0x16] & 0x80) {\r
352 PicoRegionOverride = 8;\r
353 } else {\r
354 PicoRegionOverride = 4;\r
355 }\r
356 PicoReset(0);\r
357 // TODO: bits 6 & 5\r
358 }\r
359 movie_data[0x18+30] = 0;\r
360 sprintf(noticeMsg, "MOVIE: %s", (char *) &movie_data[0x18]);\r
361 }\r
362 else\r
363 {\r
364 PicoOpt &= ~0x10000;\r
365 if(Pico.m.pal) {\r
366 strcpy(noticeMsg, "PAL SYSTEM / 50 FPS");\r
367 } else {\r
368 strcpy(noticeMsg, "NTSC SYSTEM / 60 FPS");\r
369 }\r
370 }\r
371 emu_noticeMsgUpdated();\r
372\r
373 // load SRAM for this ROM\r
374 if(currentConfig.EmuOpt & 1)\r
375 emu_SaveLoadGame(1, 1);\r
376\r
377 return 1;\r
378}\r
379\r
380\r
381static void romfname_ext(char *dst, const char *prefix, const char *ext)\r
382{\r
383 char *p;\r
384 int prefix_len = 0;\r
385\r
386 // make save filename\r
387 for (p = romFileName+strlen(romFileName)-1; p >= romFileName && *p != '/'; p--); p++;\r
388 *dst = 0;\r
389 if (prefix) {\r
390 strcpy(dst, prefix);\r
391 prefix_len = strlen(prefix);\r
392 }\r
393 strncpy(dst + prefix_len, p, 511-prefix_len);\r
394 dst[511-8] = 0;\r
395 if (dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;\r
396 if (ext) strcat(dst, ext);\r
397}\r
398\r
399\r
400int emu_ReadConfig(int game, int no_defaults)\r
401{\r
402 FILE *f;\r
403 char cfg[512], extbuf[16];\r
404 int bread = 0;\r
405\r
406 if (!game)\r
407 {\r
408 if (!no_defaults)\r
409 {\r
410 emu_setDefaultConfig();\r
411 }\r
412 strncpy(cfg, PicoConfigFile, 511);\r
413 if (config_slot != 0)\r
414 {\r
415 char *p = strrchr(cfg, '.');\r
416 if (p == NULL) p = cfg + strlen(cfg);\r
417 sprintf(extbuf, ".%i.pbcfg", config_slot);\r
418 strncpy(p, extbuf, 511 - (p - cfg));\r
419 }\r
420 cfg[511] = 0;\r
421 } else {\r
422 if (config_slot != 0)\r
423 sprintf(extbuf, ".%i.pbcfg", config_slot);\r
424 else strcpy(extbuf, ".pbcfg");\r
425 romfname_ext(cfg, "cfg/", extbuf);\r
426 f = fopen(cfg, "rb");\r
427 if (!f) romfname_ext(cfg, NULL, ".pbcfg");\r
428 else fclose(f);\r
429 }\r
430\r
431 lprintf("emu_ReadConfig: %s ", cfg);\r
432 f = fopen(cfg, "rb");\r
433 if (f) {\r
434 bread = fread(&currentConfig, 1, sizeof(currentConfig), f);\r
435 fclose(f);\r
436 }\r
437 lprintf(bread > 0 ? "(ok)\n" : "(failed)\n");\r
438\r
439 PicoOpt = currentConfig.PicoOpt;\r
440 PsndRate = currentConfig.PsndRate;\r
441 PicoRegionOverride = currentConfig.PicoRegion;\r
442 PicoAutoRgnOrder = currentConfig.PicoAutoRgnOrder;\r
443 PicoCDBuffers = currentConfig.PicoCDBuffers;\r
444 //scaling_update();\r
445 // some sanity checks\r
446 if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;\r
447 if (currentConfig.gamma < 10 || currentConfig.gamma > 300) currentConfig.gamma = 100;\r
448 if (currentConfig.volume < 0 || currentConfig.volume > 99) currentConfig.volume = 50;\r
449 // if volume keys are unbound, bind them to volume control\r
450 if (!currentConfig.KeyBinds[23] && !currentConfig.KeyBinds[22]) {\r
451 currentConfig.KeyBinds[23] = 1<<29; // vol up\r
452 currentConfig.KeyBinds[22] = 1<<30; // vol down\r
453 }\r
454\r
455 if (bread > 0) config_slot_current = config_slot;\r
456 return (bread > 0); // == sizeof(currentConfig));\r
457}\r
458\r
459\r
460int emu_WriteConfig(int game)\r
461{\r
462 FILE *f;\r
463 char cfg[512], extbuf[16];\r
464 int bwrite = 0;\r
465\r
466 if (!game)\r
467 {\r
468 strncpy(cfg, PicoConfigFile, 511);\r
469 if (config_slot != 0)\r
470 {\r
471 char *p = strrchr(cfg, '.');\r
472 if (p == NULL) p = cfg + strlen(cfg);\r
473 sprintf(extbuf, ".%i.pbcfg", config_slot);\r
474 strncpy(p, extbuf, 511 - (p - cfg));\r
475 }\r
476 cfg[511] = 0;\r
477 } else {\r
478 if (config_slot != 0)\r
479 sprintf(extbuf, ".%i.pbcfg", config_slot);\r
480 else strcpy(extbuf, ".pbcfg");\r
481 romfname_ext(cfg, "cfg/", extbuf);\r
482 }\r
483\r
484 lprintf("emu_WriteConfig: %s ", cfg);\r
485 f = fopen(cfg, "wb");\r
486 if (f) {\r
487 currentConfig.PicoOpt = PicoOpt;\r
488 currentConfig.PsndRate = PsndRate;\r
489 currentConfig.PicoRegion = PicoRegionOverride;\r
490 currentConfig.PicoAutoRgnOrder = PicoAutoRgnOrder;\r
491 currentConfig.PicoCDBuffers = PicoCDBuffers;\r
492 bwrite = fwrite(&currentConfig, 1, sizeof(currentConfig), f);\r
493 fflush(f);\r
494 fclose(f);\r
495#ifndef NO_SYNC\r
496 sync();\r
497#endif\r
498 }\r
499 lprintf((bwrite == sizeof(currentConfig)) ? "(ok)\n" : "(failed)\n");\r
500\r
501 if (bwrite == sizeof(currentConfig)) config_slot_current = config_slot;\r
502 return (bwrite == sizeof(currentConfig));\r
503}\r
504\r
505\r
506void emu_textOut8(int x, int y, const char *text)\r
507{\r
508 int i,l,len=strlen(text);\r
509 unsigned char *screen = (unsigned char *)SCREEN_BUFFER + x + y*SCREEN_WIDTH;\r
510\r
511 /* always using built-in font */\r
512 for (i = 0; i < len; i++)\r
513 {\r
514 for (l=0;l<8;l++)\r
515 {\r
516 unsigned char fd = fontdata8x8[((text[i])*8)+l];\r
517 if (fd&0x80) screen[l*SCREEN_WIDTH+0]=0xf0;\r
518 if (fd&0x40) screen[l*SCREEN_WIDTH+1]=0xf0;\r
519 if (fd&0x20) screen[l*SCREEN_WIDTH+2]=0xf0;\r
520 if (fd&0x10) screen[l*SCREEN_WIDTH+3]=0xf0;\r
521 if (fd&0x08) screen[l*SCREEN_WIDTH+4]=0xf0;\r
522 if (fd&0x04) screen[l*SCREEN_WIDTH+5]=0xf0;\r
523 if (fd&0x02) screen[l*SCREEN_WIDTH+6]=0xf0;\r
524 if (fd&0x01) screen[l*SCREEN_WIDTH+7]=0xf0;\r
525 }\r
526 screen += 8;\r
527 }\r
528}\r
529\r
530void emu_textOut16(int x, int y, const char *text)\r
531{\r
532 int i,l,len=strlen(text);\r
533 unsigned short *screen = (unsigned short *)SCREEN_BUFFER + x + y*SCREEN_WIDTH;\r
534\r
535 for (i = 0; i < len; i++)\r
536 {\r
537 for (l=0;l<8;l++)\r
538 {\r
539 unsigned char fd = fontdata8x8[((text[i])*8)+l];\r
540 if(fd&0x80) screen[l*SCREEN_WIDTH+0]=0xffff;\r
541 if(fd&0x40) screen[l*SCREEN_WIDTH+1]=0xffff;\r
542 if(fd&0x20) screen[l*SCREEN_WIDTH+2]=0xffff;\r
543 if(fd&0x10) screen[l*SCREEN_WIDTH+3]=0xffff;\r
544 if(fd&0x08) screen[l*SCREEN_WIDTH+4]=0xffff;\r
545 if(fd&0x04) screen[l*SCREEN_WIDTH+5]=0xffff;\r
546 if(fd&0x02) screen[l*SCREEN_WIDTH+6]=0xffff;\r
547 if(fd&0x01) screen[l*SCREEN_WIDTH+7]=0xffff;\r
548 }\r
549 screen += 8;\r
550 }\r
551}\r
552\r
553\r
554void emu_updateMovie(void)\r
555{\r
556 int offs = Pico.m.frame_count*3 + 0x40;\r
557 if (offs+3 > movie_size) {\r
558 free(movie_data);\r
559 movie_data = 0;\r
560 strcpy(noticeMsg, "END OF MOVIE.");\r
561 lprintf("END OF MOVIE.\n");\r
562 emu_noticeMsgUpdated();\r
563 } else {\r
564 // MXYZ SACB RLDU\r
565 PicoPad[0] = ~movie_data[offs] & 0x8f; // ! SCBA RLDU\r
566 if(!(movie_data[offs] & 0x10)) PicoPad[0] |= 0x40; // A\r
567 if(!(movie_data[offs] & 0x20)) PicoPad[0] |= 0x10; // B\r
568 if(!(movie_data[offs] & 0x40)) PicoPad[0] |= 0x20; // A\r
569 PicoPad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU\r
570 if(!(movie_data[offs+1] & 0x10)) PicoPad[1] |= 0x40; // A\r
571 if(!(movie_data[offs+1] & 0x20)) PicoPad[1] |= 0x10; // B\r
572 if(!(movie_data[offs+1] & 0x40)) PicoPad[1] |= 0x20; // A\r
573 PicoPad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX\r
574 if(!(movie_data[offs+2] & 0x01)) PicoPad[0] |= 0x0400; // X\r
575 if(!(movie_data[offs+2] & 0x04)) PicoPad[0] |= 0x0100; // Z\r
576 PicoPad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX\r
577 if(!(movie_data[offs+2] & 0x10)) PicoPad[1] |= 0x0400; // X\r
578 if(!(movie_data[offs+2] & 0x40)) PicoPad[1] |= 0x0100; // Z\r
579 }\r
580}\r
581\r
582\r
583static size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r
584{\r
585 return gzread(file, p, _n);\r
586}\r
587\r
588\r
589static size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r
590{\r
591 return gzwrite(file, p, _n);\r
592}\r
593\r
594static int try_ropen_file(const char *fname)\r
595{\r
596 FILE *f;\r
597\r
598 f = fopen(fname, "rb");\r
599 if (f) {\r
600 fclose(f);\r
601 return 1;\r
602 }\r
603 return 0;\r
604}\r
605\r
606char *emu_GetSaveFName(int load, int is_sram, int slot)\r
607{\r
608 static char saveFname[512];\r
609 char ext[16];\r
610\r
611 if (is_sram)\r
612 {\r
613 romfname_ext(saveFname, (PicoMCD&1) ? "brm/" : "srm/", (PicoMCD&1) ? ".brm" : ".srm");\r
614 if (load) {\r
615 if (try_ropen_file(saveFname)) return saveFname;\r
616 // try in current dir..\r
617 romfname_ext(saveFname, NULL, (PicoMCD&1) ? ".brm" : ".srm");\r
618 if (try_ropen_file(saveFname)) return saveFname;\r
619 return NULL; // give up\r
620 }\r
621 }\r
622 else\r
623 {\r
624 ext[0] = 0;\r
625 if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);\r
626 strcat(ext, (currentConfig.EmuOpt & 8) ? ".mds.gz" : ".mds");\r
627\r
628 romfname_ext(saveFname, "mds/", ext);\r
629 if (load) {\r
630 if (try_ropen_file(saveFname)) return saveFname;\r
631 romfname_ext(saveFname, NULL, ext);\r
632 if (try_ropen_file(saveFname)) return saveFname;\r
633 if (currentConfig.EmuOpt & 8) {\r
634 ext[0] = 0;\r
635 if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);\r
636 strcat(ext, ".mds");\r
637\r
638 romfname_ext(saveFname, "mds/", ext);\r
639 if (try_ropen_file(saveFname)) return saveFname;\r
640 romfname_ext(saveFname, NULL, ext);\r
641 if (try_ropen_file(saveFname)) return saveFname;\r
642 }\r
643 return NULL;\r
644 }\r
645 }\r
646\r
647 return saveFname;\r
648}\r
649\r
650int emu_checkSaveFile(int slot)\r
651{\r
652 return emu_GetSaveFName(1, 0, slot) ? 1 : 0;\r
653}\r
654\r
655void emu_setSaveStateCbs(int gz)\r
656{\r
657 if (gz) {\r
658 areaRead = gzRead2;\r
659 areaWrite = gzWrite2;\r
660 areaEof = (areaeof *) gzeof;\r
661 areaSeek = (areaseek *) gzseek;\r
662 areaClose = (areaclose *) gzclose;\r
663 } else {\r
664 areaRead = (arearw *) fread;\r
665 areaWrite = (arearw *) fwrite;\r
666 areaEof = (areaeof *) feof;\r
667 areaSeek = (areaseek *) fseek;\r
668 areaClose = (areaclose *) fclose;\r
669 }\r
670}\r
671\r
672int emu_SaveLoadGame(int load, int sram)\r
673{\r
674 int ret = 0;\r
675 char *saveFname;\r
676\r
677 // make save filename\r
678 saveFname = emu_GetSaveFName(load, sram, state_slot);\r
679 if (saveFname == NULL) {\r
680 if (!sram) {\r
681 strcpy(noticeMsg, load ? "LOAD FAILED (missing file)" : "SAVE FAILED ");\r
682 emu_noticeMsgUpdated();\r
683 }\r
684 return -1;\r
685 }\r
686\r
687 lprintf("saveLoad (%i, %i): %s\n", load, sram, saveFname);\r
688\r
689 if(sram) {\r
690 FILE *sramFile;\r
691 int sram_size;\r
692 unsigned char *sram_data;\r
693 int truncate = 1;\r
694 if (PicoMCD&1) {\r
695 if (PicoOpt&0x8000) { // MCD RAM cart?\r
696 sram_size = 0x12000;\r
697 sram_data = SRam.data;\r
698 if (sram_data)\r
699 memcpy32((int *)sram_data, (int *)Pico_mcd->bram, 0x2000/4);\r
700 } else {\r
701 sram_size = 0x2000;\r
702 sram_data = Pico_mcd->bram;\r
703 truncate = 0; // the .brm may contain RAM cart data after normal brm\r
704 }\r
705 } else {\r
706 sram_size = SRam.end-SRam.start+1;\r
707 if(Pico.m.sram_reg & 4) sram_size=0x2000;\r
708 sram_data = SRam.data;\r
709 }\r
710 if (!sram_data) return 0; // SRam forcefully disabled for this game\r
711\r
712 if (load) {\r
713 sramFile = fopen(saveFname, "rb");\r
714 if(!sramFile) return -1;\r
715 fread(sram_data, 1, sram_size, sramFile);\r
716 fclose(sramFile);\r
717 if ((PicoMCD&1) && (PicoOpt&0x8000))\r
718 memcpy32((int *)Pico_mcd->bram, (int *)sram_data, 0x2000/4);\r
719 } else {\r
720 // sram save needs some special processing\r
721 // see if we have anything to save\r
722 for (; sram_size > 0; sram_size--)\r
723 if (sram_data[sram_size-1]) break;\r
724\r
725 if (sram_size) {\r
726 sramFile = fopen(saveFname, truncate ? "wb" : "r+b");\r
727 if (!sramFile) sramFile = fopen(saveFname, "wb"); // retry\r
728 if (!sramFile) return -1;\r
729 ret = fwrite(sram_data, 1, sram_size, sramFile);\r
730 ret = (ret != sram_size) ? -1 : 0;\r
731 fclose(sramFile);\r
732#ifndef NO_SYNC\r
733 sync();\r
734#endif\r
735 }\r
736 }\r
737 return ret;\r
738 }\r
739 else\r
740 {\r
741 void *PmovFile = NULL;\r
742 if (strcmp(saveFname + strlen(saveFname) - 3, ".gz") == 0) {\r
743 if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {\r
744 emu_setSaveStateCbs(1);\r
745 if(!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);\r
746 }\r
747 }\r
748 else\r
749 {\r
750 if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {\r
751 emu_setSaveStateCbs(0);\r
752 }\r
753 }\r
754 if(PmovFile) {\r
755 ret = PmovState(load ? 6 : 5, PmovFile);\r
756 areaClose(PmovFile);\r
757 PmovFile = 0;\r
758 if (load) Pico.m.dirtyPal=1;\r
759#ifndef NO_SYNC\r
760 else sync();\r
761#endif\r
762 }\r
763 else ret = -1;\r
764 if (!ret)\r
765 strcpy(noticeMsg, load ? "GAME LOADED " : "GAME SAVED ");\r
766 else\r
767 {\r
768 strcpy(noticeMsg, load ? "LOAD FAILED " : "SAVE FAILED ");\r
769 ret = -1;\r
770 }\r
771\r
772 emu_noticeMsgUpdated();\r
773 return ret;\r
774 }\r
775}\r
fast MegaDrive/MegaCD/32X emulator