src/gba/serialize.c (view raw)
1/* Copyright (c) 2013-2016 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include "serialize.h"
7
8#include "core/sync.h"
9#include "gba/audio.h"
10#include "gba/cheats.h"
11#include "gba/io.h"
12#include "gba/rr/rr.h"
13#include "gba/video.h"
14
15#include "util/memory.h"
16#include "util/vfs.h"
17
18#include <fcntl.h>
19#ifdef _MSC_VER
20#include <time.h>
21#else
22#include <sys/time.h>
23#endif
24
25#ifdef USE_PNG
26#include "util/png-io.h"
27#include <png.h>
28#include <zlib.h>
29#endif
30
31const uint32_t GBA_SAVESTATE_MAGIC = 0x01000000;
32const uint32_t GBA_SAVESTATE_VERSION = 0x00000001;
33
34mLOG_DEFINE_CATEGORY(GBA_STATE, "GBA Savestate");
35
36struct GBABundledState {
37 struct GBASerializedState* state;
38 struct GBAExtdata* extdata;
39};
40
41struct GBAExtdataHeader {
42 uint32_t tag;
43 int32_t size;
44 int64_t offset;
45};
46
47void GBASerialize(struct GBA* gba, struct GBASerializedState* state) {
48 STORE_32(GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, 0, &state->versionMagic);
49 STORE_32(gba->biosChecksum, 0, &state->biosChecksum);
50 STORE_32(gba->romCrc32, 0, &state->romCrc32);
51
52 if (gba->memory.rom) {
53 state->id = ((struct GBACartridge*) gba->memory.rom)->id;
54 memcpy(state->title, ((struct GBACartridge*) gba->memory.rom)->title, sizeof(state->title));
55 } else {
56 state->id = 0;
57 memset(state->title, 0, sizeof(state->title));
58 }
59
60 int i;
61 for (i = 0; i < 16; ++i) {
62 STORE_32(gba->cpu->gprs[i], i * sizeof(state->cpu.gprs[0]), state->cpu.gprs);
63 }
64 STORE_32(gba->cpu->cpsr.packed, 0, &state->cpu.cpsr.packed);
65 STORE_32(gba->cpu->spsr.packed, 0, &state->cpu.spsr.packed);
66 STORE_32(gba->cpu->cycles, 0, &state->cpu.cycles);
67 STORE_32(gba->cpu->nextEvent, 0, &state->cpu.nextEvent);
68 for (i = 0; i < 6; ++i) {
69 int j;
70 for (j = 0; j < 7; ++j) {
71 STORE_32(gba->cpu->bankedRegisters[i][j], (i * 7 + j) * sizeof(gba->cpu->bankedRegisters[0][0]), state->cpu.bankedRegisters);
72 }
73 STORE_32(gba->cpu->bankedSPSRs[i], i * sizeof(gba->cpu->bankedSPSRs[0]), state->cpu.bankedSPSRs);
74 }
75
76 state->biosPrefetch = gba->memory.biosPrefetch;
77 STORE_32(gba->cpu->prefetch[0], 0, state->cpuPrefetch);
78 STORE_32(gba->cpu->prefetch[1], 4, state->cpuPrefetch);
79
80 GBAMemorySerialize(&gba->memory, state);
81 GBAIOSerialize(gba, state);
82 GBAVideoSerialize(&gba->video, state);
83 GBAAudioSerialize(&gba->audio, state);
84 GBASavedataSerialize(&gba->memory.savedata, state);
85
86#ifndef _MSC_VER
87 struct timeval tv;
88 if (!gettimeofday(&tv, 0)) {
89 uint64_t usec = tv.tv_usec;
90 usec += tv.tv_sec * 1000000LL;
91 STORE_64(usec, 0, &state->creationUsec);
92 }
93#else
94 struct timespec ts;
95 if (timespec_get(&ts, TIME_UTC)) {
96 uint64_t usec = ts.tv_nsec / 1000;
97 usec += ts.tv_sec * 1000000LL;
98 STORE_64(usec, 0, &state->creationUsec);
99 }
100#endif
101 else {
102 state->creationUsec = 0;
103 }
104 state->associatedStreamId = 0;
105 if (gba->rr) {
106 gba->rr->stateSaved(gba->rr, state);
107 }
108}
109
110bool GBADeserialize(struct GBA* gba, const struct GBASerializedState* state) {
111 bool error = false;
112 int32_t check;
113 uint32_t ucheck;
114 LOAD_32(ucheck, 0, &state->versionMagic);
115 if (ucheck > GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION) {
116 mLOG(GBA_STATE, WARN, "Invalid or too new savestate: expected %08X, got %08X", GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, ucheck);
117 error = true;
118 } else if (ucheck < GBA_SAVESTATE_MAGIC) {
119 mLOG(GBA_STATE, WARN, "Invalid savestate: expected %08X, got %08X", GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, ucheck);
120 error = true;
121 } else {
122 mLOG(GBA_STATE, WARN, "Old savestate: expected %08X, got %08X, continuing anyway", GBA_SAVESTATE_MAGIC + GBA_SAVESTATE_VERSION, ucheck);
123 }
124 LOAD_32(ucheck, 0, &state->biosChecksum);
125 if (ucheck != gba->biosChecksum) {
126 mLOG(GBA_STATE, WARN, "Savestate created using a different version of the BIOS: expected %08X, got %08X", gba->biosChecksum, ucheck);
127 uint32_t pc;
128 LOAD_32(pc, ARM_PC * sizeof(state->cpu.gprs[0]), state->cpu.gprs);
129 if (pc < SIZE_BIOS && pc >= 0x20) {
130 error = true;
131 }
132 }
133 if (gba->memory.rom && (state->id != ((struct GBACartridge*) gba->memory.rom)->id || memcmp(state->title, ((struct GBACartridge*) gba->memory.rom)->title, sizeof(state->title)))) {
134 mLOG(GBA_STATE, WARN, "Savestate is for a different game");
135 error = true;
136 } else if (!gba->memory.rom && state->id != 0) {
137 mLOG(GBA_STATE, WARN, "Savestate is for a game, but no game loaded");
138 error = true;
139 }
140 LOAD_32(ucheck, 0, &state->romCrc32);
141 if (ucheck != gba->romCrc32) {
142 mLOG(GBA_STATE, WARN, "Savestate is for a different version of the game");
143 }
144 LOAD_32(check, 0, &state->cpu.cycles);
145 if (check < 0) {
146 mLOG(GBA_STATE, WARN, "Savestate is corrupted: CPU cycles are negative");
147 error = true;
148 }
149 if (check >= (int32_t) GBA_ARM7TDMI_FREQUENCY) {
150 mLOG(GBA_STATE, WARN, "Savestate is corrupted: CPU cycles are too high");
151 error = true;
152 }
153 LOAD_32(check, 0, &state->video.eventDiff);
154 if (check < 0) {
155 mLOG(GBA_STATE, WARN, "Savestate is corrupted: video eventDiff is negative");
156 error = true;
157 }
158 LOAD_32(check, ARM_PC * sizeof(state->cpu.gprs[0]), state->cpu.gprs);
159 int region = (check >> BASE_OFFSET);
160 if ((region == REGION_CART0 || region == REGION_CART1 || region == REGION_CART2) && ((check - WORD_SIZE_ARM) & SIZE_CART0) >= gba->memory.romSize - WORD_SIZE_ARM) {
161 mLOG(GBA_STATE, WARN, "Savestate created using a differently sized version of the ROM");
162 error = true;
163 }
164 if (error) {
165 return false;
166 }
167 size_t i;
168 for (i = 0; i < 16; ++i) {
169 LOAD_32(gba->cpu->gprs[i], i * sizeof(gba->cpu->gprs[0]), state->cpu.gprs);
170 }
171 LOAD_32(gba->cpu->cpsr.packed, 0, &state->cpu.cpsr.packed);
172 LOAD_32(gba->cpu->spsr.packed, 0, &state->cpu.spsr.packed);
173 LOAD_32(gba->cpu->cycles, 0, &state->cpu.cycles);
174 LOAD_32(gba->cpu->nextEvent, 0, &state->cpu.nextEvent);
175 for (i = 0; i < 6; ++i) {
176 int j;
177 for (j = 0; j < 7; ++j) {
178 LOAD_32(gba->cpu->bankedRegisters[i][j], (i * 7 + j) * sizeof(gba->cpu->bankedRegisters[0][0]), state->cpu.bankedRegisters);
179 }
180 LOAD_32(gba->cpu->bankedSPSRs[i], i * sizeof(gba->cpu->bankedSPSRs[0]), state->cpu.bankedSPSRs);
181 }
182 gba->cpu->privilegeMode = gba->cpu->cpsr.priv;
183 gba->cpu->memory.setActiveRegion(gba->cpu, gba->cpu->gprs[ARM_PC]);
184 if (state->biosPrefetch) {
185 LOAD_32(gba->memory.biosPrefetch, 0, &state->biosPrefetch);
186 }
187 if (gba->cpu->cpsr.t) {
188 gba->cpu->executionMode = MODE_THUMB;
189 if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
190 LOAD_32(gba->cpu->prefetch[0], 0, state->cpuPrefetch);
191 LOAD_32(gba->cpu->prefetch[1], 4, state->cpuPrefetch);
192 gba->cpu->prefetch[0] &= 0xFFFF;
193 gba->cpu->prefetch[1] &= 0xFFFF;
194 } else {
195 // Maintain backwards compat
196 LOAD_16(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_THUMB) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
197 LOAD_16(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
198 }
199 } else {
200 gba->cpu->executionMode = MODE_ARM;
201 if (state->cpuPrefetch[0] && state->cpuPrefetch[1]) {
202 LOAD_32(gba->cpu->prefetch[0], 0, state->cpuPrefetch);
203 LOAD_32(gba->cpu->prefetch[1], 4, state->cpuPrefetch);
204 } else {
205 // Maintain backwards compat
206 LOAD_32(gba->cpu->prefetch[0], (gba->cpu->gprs[ARM_PC] - WORD_SIZE_ARM) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
207 LOAD_32(gba->cpu->prefetch[1], (gba->cpu->gprs[ARM_PC]) & gba->cpu->memory.activeMask, gba->cpu->memory.activeRegion);
208 }
209 }
210
211 GBAMemoryDeserialize(&gba->memory, state);
212 GBAIODeserialize(gba, state);
213 GBAVideoDeserialize(&gba->video, state);
214 GBAAudioDeserialize(&gba->audio, state);
215 GBASavedataDeserialize(&gba->memory.savedata, state);
216
217 if (gba->rr) {
218 gba->rr->stateLoaded(gba->rr, state);
219 }
220 return true;
221}
222
223#ifdef USE_PNG
224static bool _savePNGState(struct GBA* gba, struct VFile* vf, struct GBAExtdata* extdata) {
225 unsigned stride;
226 const void* pixels = 0;
227 gba->video.renderer->getPixels(gba->video.renderer, &stride, &pixels);
228 if (!pixels) {
229 return false;
230 }
231
232 struct GBASerializedState* state = GBAAllocateState();
233 if (!state) {
234 return false;
235 }
236 GBASerialize(gba, state);
237 uLongf len = compressBound(sizeof(*state));
238 void* buffer = malloc(len);
239 if (!buffer) {
240 GBADeallocateState(state);
241 return false;
242 }
243 compress(buffer, &len, (const Bytef*) state, sizeof(*state));
244 GBADeallocateState(state);
245
246 png_structp png = PNGWriteOpen(vf);
247 png_infop info = PNGWriteHeader(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS);
248 if (!png || !info) {
249 PNGWriteClose(png, info);
250 free(buffer);
251 return false;
252 }
253 PNGWritePixels(png, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, stride, pixels);
254 PNGWriteCustomChunk(png, "gbAs", len, buffer);
255 if (extdata) {
256 uint32_t i;
257 for (i = 1; i < EXTDATA_MAX; ++i) {
258 if (!extdata->data[i].data) {
259 continue;
260 }
261 uLongf len = compressBound(extdata->data[i].size) + sizeof(uint32_t) * 2;
262 uint32_t* data = malloc(len);
263 if (!data) {
264 continue;
265 }
266 STORE_32(i, 0, data);
267 STORE_32(extdata->data[i].size, sizeof(uint32_t), data);
268 compress((Bytef*) (data + 2), &len, extdata->data[i].data, extdata->data[i].size);
269 PNGWriteCustomChunk(png, "gbAx", len + sizeof(uint32_t) * 2, data);
270 free(data);
271 }
272 }
273 PNGWriteClose(png, info);
274 free(buffer);
275 return true;
276}
277
278static int _loadPNGChunkHandler(png_structp png, png_unknown_chunkp chunk) {
279 struct GBABundledState* bundle = png_get_user_chunk_ptr(png);
280 if (!bundle) {
281 return 0;
282 }
283 if (!strcmp((const char*) chunk->name, "gbAs")) {
284 struct GBASerializedState* state = bundle->state;
285 if (!state) {
286 return 0;
287 }
288 uLongf len = sizeof(*state);
289 uncompress((Bytef*) state, &len, chunk->data, chunk->size);
290 return 1;
291 }
292 if (!strcmp((const char*) chunk->name, "gbAx")) {
293 struct GBAExtdata* extdata = bundle->extdata;
294 if (!extdata) {
295 return 0;
296 }
297 struct GBAExtdataItem item;
298 if (chunk->size < sizeof(uint32_t) * 2) {
299 return 0;
300 }
301 uint32_t tag;
302 LOAD_32(tag, 0, chunk->data);
303 LOAD_32(item.size, sizeof(uint32_t), chunk->data);
304 uLongf len = item.size;
305 if (item.size < 0 || tag == EXTDATA_NONE || tag >= EXTDATA_MAX) {
306 return 0;
307 }
308 item.data = malloc(item.size);
309 item.clean = free;
310 if (!item.data) {
311 return 0;
312 }
313 const uint8_t* data = chunk->data;
314 data += sizeof(uint32_t) * 2;
315 uncompress((Bytef*) item.data, &len, data, chunk->size);
316 item.size = len;
317 GBAExtdataPut(extdata, tag, &item);
318 return 1;
319 }
320 return 0;
321}
322
323static struct GBASerializedState* _loadPNGState(struct VFile* vf, struct GBAExtdata* extdata) {
324 png_structp png = PNGReadOpen(vf, PNG_HEADER_BYTES);
325 png_infop info = png_create_info_struct(png);
326 png_infop end = png_create_info_struct(png);
327 if (!png || !info || !end) {
328 PNGReadClose(png, info, end);
329 return false;
330 }
331 uint32_t* pixels = malloc(VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4);
332 if (!pixels) {
333 PNGReadClose(png, info, end);
334 return false;
335 }
336
337 struct GBASerializedState* state = GBAAllocateState();
338 struct GBABundledState bundle = {
339 .state = state,
340 .extdata = extdata
341 };
342
343 PNGInstallChunkHandler(png, &bundle, _loadPNGChunkHandler, "gbAs gbAx");
344 bool success = PNGReadHeader(png, info);
345 success = success && PNGReadPixels(png, info, pixels, VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS, VIDEO_HORIZONTAL_PIXELS);
346 success = success && PNGReadFooter(png, end);
347 PNGReadClose(png, info, end);
348
349 if (success) {
350 struct GBAExtdataItem item = {
351 .size = VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4,
352 .data = pixels,
353 .clean = free
354 };
355 GBAExtdataPut(extdata, EXTDATA_SCREENSHOT, &item);
356 } else {
357 free(pixels);
358 GBADeallocateState(state);
359 return 0;
360 }
361 return state;
362}
363#endif
364
365bool GBASaveStateNamed(struct GBA* gba, struct VFile* vf, int flags) {
366 struct GBAExtdata extdata;
367 GBAExtdataInit(&extdata);
368 if (flags & SAVESTATE_SAVEDATA) {
369 // TODO: A better way to do this would be nice
370 void* sram = malloc(SIZE_CART_FLASH1M);
371 struct VFile* svf = VFileFromMemory(sram, SIZE_CART_FLASH1M);
372 if (GBASavedataClone(&gba->memory.savedata, svf)) {
373 struct GBAExtdataItem item = {
374 .size = svf->seek(svf, 0, SEEK_CUR),
375 .data = sram,
376 .clean = free
377 };
378 GBAExtdataPut(&extdata, EXTDATA_SAVEDATA, &item);
379 } else {
380 free(sram);
381 }
382 svf->close(svf);
383 }
384 struct VFile* cheatVf = 0;
385 if (flags & SAVESTATE_CHEATS && gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE]) {
386 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
387 cheatVf = VFileMemChunk(0, 0);
388 if (cheatVf) {
389 GBACheatSaveFile(device, cheatVf);
390 struct GBAExtdataItem item = {
391 .size = cheatVf->size(cheatVf),
392 .data = cheatVf->map(cheatVf, cheatVf->size(cheatVf), MAP_READ),
393 .clean = 0
394 };
395 GBAExtdataPut(&extdata, EXTDATA_CHEATS, &item);
396 }
397 };
398#ifdef USE_PNG
399 if (!(flags & SAVESTATE_SCREENSHOT)) {
400#else
401 UNUSED(flags);
402#endif
403 vf->truncate(vf, sizeof(struct GBASerializedState));
404 struct GBASerializedState* state = vf->map(vf, sizeof(struct GBASerializedState), MAP_WRITE);
405 if (!state) {
406 GBAExtdataDeinit(&extdata);
407 if (cheatVf) {
408 cheatVf->close(cheatVf);
409 }
410 return false;
411 }
412 GBASerialize(gba, state);
413 vf->unmap(vf, state, sizeof(struct GBASerializedState));
414 vf->seek(vf, sizeof(struct GBASerializedState), SEEK_SET);
415 GBAExtdataSerialize(&extdata, vf);
416 GBAExtdataDeinit(&extdata);
417 if (cheatVf) {
418 cheatVf->close(cheatVf);
419 }
420 return true;
421#ifdef USE_PNG
422 }
423 else {
424 bool success = _savePNGState(gba, vf, &extdata);
425 GBAExtdataDeinit(&extdata);
426 return success;
427 }
428#endif
429 GBAExtdataDeinit(&extdata);
430 return false;
431}
432
433struct GBASerializedState* GBAExtractState(struct VFile* vf, struct GBAExtdata* extdata) {
434#ifdef USE_PNG
435 if (isPNG(vf)) {
436 return _loadPNGState(vf, extdata);
437 }
438#endif
439 vf->seek(vf, 0, SEEK_SET);
440 if (vf->size(vf) < (ssize_t) sizeof(struct GBASerializedState)) {
441 return false;
442 }
443 struct GBASerializedState* state = GBAAllocateState();
444 if (vf->read(vf, state, sizeof(*state)) != sizeof(*state)) {
445 GBADeallocateState(state);
446 return 0;
447 }
448 if (extdata) {
449 GBAExtdataDeserialize(extdata, vf);
450 }
451 return state;
452}
453
454bool GBALoadStateNamed(struct GBA* gba, struct VFile* vf, int flags) {
455 struct GBAExtdata extdata;
456 GBAExtdataInit(&extdata);
457 struct GBASerializedState* state = GBAExtractState(vf, &extdata);
458 if (!state) {
459 return false;
460 }
461 bool success = GBADeserialize(gba, state);
462 GBADeallocateState(state);
463
464 struct GBAExtdataItem item;
465 if (flags & SAVESTATE_SCREENSHOT && GBAExtdataGet(&extdata, EXTDATA_SCREENSHOT, &item)) {
466 if (item.size >= VIDEO_HORIZONTAL_PIXELS * VIDEO_VERTICAL_PIXELS * 4) {
467 gba->video.renderer->putPixels(gba->video.renderer, VIDEO_HORIZONTAL_PIXELS, item.data);
468 mCoreSyncForceFrame(gba->sync);
469 } else {
470 mLOG(GBA_STATE, WARN, "Savestate includes invalid screenshot");
471 }
472 }
473 if (flags & SAVESTATE_SAVEDATA && GBAExtdataGet(&extdata, EXTDATA_SAVEDATA, &item)) {
474 struct VFile* svf = VFileFromMemory(item.data, item.size);
475 GBASavedataLoad(&gba->memory.savedata, svf);
476 if (svf) {
477 svf->close(svf);
478 }
479 }
480 if (flags & SAVESTATE_CHEATS && gba->cpu->components && gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE] && GBAExtdataGet(&extdata, EXTDATA_CHEATS, &item)) {
481 if (item.size) {
482 struct GBACheatDevice* device = (struct GBACheatDevice*) gba->cpu->components[GBA_COMPONENT_CHEAT_DEVICE];
483 struct VFile* svf = VFileFromMemory(item.data, item.size);
484 if (svf) {
485 GBACheatDeviceClear(device);
486 GBACheatParseFile(device, svf);
487 svf->close(svf);
488 }
489 }
490 }
491 GBAExtdataDeinit(&extdata);
492 return success;
493}
494
495bool GBAExtdataInit(struct GBAExtdata* extdata) {
496 memset(extdata->data, 0, sizeof(extdata->data));
497 return true;
498}
499
500void GBAExtdataDeinit(struct GBAExtdata* extdata) {
501 size_t i;
502 for (i = 1; i < EXTDATA_MAX; ++i) {
503 if (extdata->data[i].data && extdata->data[i].clean) {
504 extdata->data[i].clean(extdata->data[i].data);
505 }
506 }
507}
508
509void GBAExtdataPut(struct GBAExtdata* extdata, enum GBAExtdataTag tag, struct GBAExtdataItem* item) {
510 if (tag == EXTDATA_NONE || tag >= EXTDATA_MAX) {
511 return;
512 }
513
514 if (extdata->data[tag].data && extdata->data[tag].clean) {
515 extdata->data[tag].clean(extdata->data[tag].data);
516 }
517 extdata->data[tag] = *item;
518}
519
520bool GBAExtdataGet(struct GBAExtdata* extdata, enum GBAExtdataTag tag, struct GBAExtdataItem* item) {
521 if (tag == EXTDATA_NONE || tag >= EXTDATA_MAX) {
522 return false;
523 }
524
525 *item = extdata->data[tag];
526 return true;
527}
528
529bool GBAExtdataSerialize(struct GBAExtdata* extdata, struct VFile* vf) {
530 ssize_t position = vf->seek(vf, 0, SEEK_CUR);
531 ssize_t size = sizeof(struct GBAExtdataHeader);
532 size_t i = 0;
533 for (i = 1; i < EXTDATA_MAX; ++i) {
534 if (extdata->data[i].data) {
535 size += sizeof(struct GBAExtdataHeader);
536 }
537 }
538 if (size == sizeof(struct GBAExtdataHeader)) {
539 return true;
540 }
541 struct GBAExtdataHeader* header = malloc(size);
542 position += size;
543
544 size_t j;
545 for (i = 1, j = 0; i < EXTDATA_MAX; ++i) {
546 if (extdata->data[i].data) {
547 STORE_32(i, offsetof(struct GBAExtdataHeader, tag), &header[j]);
548 STORE_32(extdata->data[i].size, offsetof(struct GBAExtdataHeader, size), &header[j]);
549 STORE_64(position, offsetof(struct GBAExtdataHeader, offset), &header[j]);
550 position += extdata->data[i].size;
551 ++j;
552 }
553 }
554 header[j].tag = 0;
555 header[j].size = 0;
556 header[j].offset = 0;
557
558 if (vf->write(vf, header, size) != size) {
559 free(header);
560 return false;
561 }
562 free(header);
563
564 for (i = 1; i < EXTDATA_MAX; ++i) {
565 if (extdata->data[i].data) {
566 if (vf->write(vf, extdata->data[i].data, extdata->data[i].size) != extdata->data[i].size) {
567 return false;
568 }
569 }
570 }
571 return true;
572}
573
574bool GBAExtdataDeserialize(struct GBAExtdata* extdata, struct VFile* vf) {
575 while (true) {
576 struct GBAExtdataHeader buffer, header;
577 if (vf->read(vf, &buffer, sizeof(buffer)) != sizeof(buffer)) {
578 return false;
579 }
580 LOAD_32(header.tag, 0, &buffer.tag);
581 LOAD_32(header.size, 0, &buffer.size);
582 LOAD_64(header.offset, 0, &buffer.offset);
583
584 if (header.tag == EXTDATA_NONE) {
585 break;
586 }
587 if (header.tag >= EXTDATA_MAX) {
588 continue;
589 }
590 ssize_t position = vf->seek(vf, 0, SEEK_CUR);
591 if (vf->seek(vf, header.offset, SEEK_SET) < 0) {
592 return false;
593 }
594 struct GBAExtdataItem item = {
595 .data = malloc(header.size),
596 .size = header.size,
597 .clean = free
598 };
599 if (!item.data) {
600 continue;
601 }
602 if (vf->read(vf, item.data, header.size) != header.size) {
603 free(item.data);
604 continue;
605 }
606 GBAExtdataPut(extdata, header.tag, &item);
607 vf->seek(vf, position, SEEK_SET);
608 };
609 return true;
610}
611
612struct GBASerializedState* GBAAllocateState(void) {
613 return anonymousMemoryMap(sizeof(struct GBASerializedState));
614}
615
616void GBADeallocateState(struct GBASerializedState* state) {
617 mappedMemoryFree(state, sizeof(struct GBASerializedState));
618}
619
620// TODO: Put back rewind