bool GBDeserialize(struct GB* gb, const struct GBSerializedState* state) {
bool error = false;
int32_t check;
uint32_t ucheck;
int16_t check16;
uint16_t ucheck16;
LOAD_32LE(ucheck, 0, &state->versionMagic);
if (ucheck > GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION) {
mLOG(GB_STATE, WARN, "Invalid or too new savestate: expected %08X, got %08X", GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION, ucheck);
error = true;
} else if (ucheck < GB_SAVESTATE_MAGIC) {
mLOG(GB_STATE, WARN, "Invalid savestate: expected %08X, got %08X", GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION, ucheck);
error = true;
} else if (ucheck < GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION) {
mLOG(GB_STATE, WARN, "Old savestate: expected %08X, got %08X, continuing anyway", GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION, ucheck);
}
bool canSgb = ucheck >= GB_SAVESTATE_MAGIC + 2;
if (gb->memory.rom && memcmp(state->title, ((struct GBCartridge*) &gb->memory.rom[0x100])->titleLong, sizeof(state->title))) {
LOAD_32LE(ucheck, 0, &state->versionMagic);
if (ucheck > GB_SAVESTATE_MAGIC + 2 || memcmp(state->title, ((struct GBCartridge*) gb->memory.rom)->titleLong, sizeof(state->title))) {
// There was a bug in previous versions where the memory address being compared was wrong
mLOG(GB_STATE, WARN, "Savestate is for a different game");
error = true;
}
}
LOAD_32LE(ucheck, 0, &state->romCrc32);
if (ucheck != gb->romCrc32) {
mLOG(GB_STATE, WARN, "Savestate is for a different version of the game");
}
LOAD_32LE(check, 0, &state->cpu.cycles);
if (check < 0) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: CPU cycles are negative");
error = true;
}
if (state->cpu.executionState != LR35902_CORE_FETCH) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: Execution state is not FETCH");
error = true;
}
if (check >= (int32_t) DMG_LR35902_FREQUENCY) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: CPU cycles are too high");
error = true;
}
LOAD_16LE(check16, 0, &state->video.x);
if (check16 < 0 || check16 > GB_VIDEO_HORIZONTAL_PIXELS) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: video x is out of range");
error = true;
}
LOAD_16LE(check16, 0, &state->video.ly);
if (check16 < 0 || check16 > GB_VIDEO_VERTICAL_TOTAL_PIXELS) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: video y is out of range");
error = true;
}
LOAD_16LE(ucheck16, 0, &state->memory.dmaDest);
if (ucheck16 + state->memory.dmaRemaining > GB_SIZE_OAM) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: DMA destination is out of range");
error = true;
}
LOAD_16LE(ucheck16, 0, &state->video.bcpIndex);
if (ucheck16 >= 0x40) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: BCPS is out of range");
}
LOAD_16LE(ucheck16, 0, &state->video.ocpIndex);
if (ucheck16 >= 0x40) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: OCPS is out of range");
}
if (error) {
return false;
}
gb->timing.root = NULL;
LOAD_32LE(gb->timing.masterCycles, 0, &state->masterCycles);
gb->cpu->a = state->cpu.a;
gb->cpu->f.packed = state->cpu.f;
gb->cpu->b = state->cpu.b;
gb->cpu->c = state->cpu.c;
gb->cpu->d = state->cpu.d;
gb->cpu->e = state->cpu.e;
gb->cpu->h = state->cpu.h;
gb->cpu->l = state->cpu.l;
LOAD_16LE(gb->cpu->sp, 0, &state->cpu.sp);
LOAD_16LE(gb->cpu->pc, 0, &state->cpu.pc);
LOAD_16LE(gb->cpu->index, 0, &state->cpu.index);
gb->cpu->bus = state->cpu.bus;
gb->cpu->executionState = state->cpu.executionState;
GBSerializedCpuFlags flags;
LOAD_32LE(flags, 0, &state->cpu.flags);
gb->cpu->condition = GBSerializedCpuFlagsGetCondition(flags);
gb->cpu->irqPending = GBSerializedCpuFlagsGetIrqPending(flags);
gb->doubleSpeed = GBSerializedCpuFlagsGetDoubleSpeed(flags);
gb->audio.timingFactor = gb->doubleSpeed + 1;
LOAD_32LE(gb->cpu->cycles, 0, &state->cpu.cycles);
LOAD_32LE(gb->cpu->nextEvent, 0, &state->cpu.nextEvent);
gb->timing.root = NULL;
uint32_t when;
LOAD_32LE(when, 0, &state->cpu.eiPending);
if (GBSerializedCpuFlagsIsEiPending(flags)) {
mTimingSchedule(&gb->timing, &gb->eiPending, when);
}
gb->model = state->model;
if (gb->model < GB_MODEL_CGB) {
gb->audio.style = GB_AUDIO_DMG;
} else {
gb->audio.style = GB_AUDIO_CGB;
}
GBMemoryDeserialize(gb, state);
GBVideoDeserialize(&gb->video, state);
GBIODeserialize(gb, state);
GBTimerDeserialize(&gb->timer, state);
GBAudioDeserialize(&gb->audio, state);
if (gb->model & GB_MODEL_SGB && canSgb) {
GBSGBDeserialize(gb, state);
}
gb->cpu->memory.setActiveRegion(gb->cpu, gb->cpu->pc);
gb->timing.reroot = gb->timing.root;
gb->timing.root = NULL;
return true;
}
bool GBDeserialize(struct GB* gb, const struct GBSerializedState* state) {
bool error = false;
int32_t check;
uint32_t ucheck;
LOAD_32LE(ucheck, 0, &state->versionMagic);
if (ucheck > GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION) {
mLOG(GB_STATE, WARN, "Invalid or too new savestate: expected %08X, got %08X", GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION, ucheck);
error = true;
} else if (ucheck < GB_SAVESTATE_MAGIC) {
mLOG(GB_STATE, WARN, "Invalid savestate: expected %08X, got %08X", GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION, ucheck);
error = true;
} else if (ucheck < GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION) {
mLOG(GB_STATE, WARN, "Old savestate: expected %08X, got %08X, continuing anyway", GB_SAVESTATE_MAGIC + GB_SAVESTATE_VERSION, ucheck);
}
if (gb->memory.rom && memcmp(state->title, ((struct GBCartridge*) gb->memory.rom)->titleLong, sizeof(state->title))) {
mLOG(GB_STATE, WARN, "Savestate is for a different game");
error = true;
}
LOAD_32LE(ucheck, 0, &state->romCrc32);
if (ucheck != gb->romCrc32) {
mLOG(GB_STATE, WARN, "Savestate is for a different version of the game");
}
LOAD_32LE(check, 0, &state->cpu.cycles);
if (check < 0) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: CPU cycles are negative");
error = true;
}
if (check >= (int32_t) DMG_LR35902_FREQUENCY) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: CPU cycles are too high");
error = true;
}
LOAD_32LE(check, 0, &state->video.eventDiff);
if (check < 0) {
mLOG(GB_STATE, WARN, "Savestate is corrupted: video eventDiff is negative");
error = true;
}
if (error) {
return false;
}
gb->cpu->a = state->cpu.a;
gb->cpu->f.packed = state->cpu.f;
gb->cpu->b = state->cpu.b;
gb->cpu->c = state->cpu.c;
gb->cpu->d = state->cpu.d;
gb->cpu->e = state->cpu.e;
gb->cpu->h = state->cpu.h;
gb->cpu->l = state->cpu.l;
LOAD_16LE(gb->cpu->sp, 0, &state->cpu.sp);
LOAD_16LE(gb->cpu->pc, 0, &state->cpu.pc);
LOAD_16LE(gb->cpu->index, 0, &state->cpu.index);
gb->cpu->bus = state->cpu.bus;
gb->cpu->executionState = state->cpu.executionState;
LOAD_16LE(gb->cpu->irqVector, 0, &state->cpu.irqVector);
LOAD_32LE(gb->eiPending, 0, &state->cpu.eiPending);
GBSerializedCpuFlags flags;
LOAD_32LE(flags, 0, &state->cpu.flags);
gb->cpu->condition = GBSerializedCpuFlagsGetCondition(flags);
gb->cpu->irqPending = GBSerializedCpuFlagsGetIrqPending(flags);
gb->doubleSpeed = GBSerializedCpuFlagsGetDoubleSpeed(flags);
LOAD_32LE(gb->cpu->cycles, 0, &state->cpu.cycles);
LOAD_32LE(gb->cpu->nextEvent, 0, &state->cpu.nextEvent);
gb->model = state->model;
if (gb->model < GB_MODEL_CGB) {
gb->audio.style = GB_AUDIO_DMG;
} else {
gb->audio.style = GB_AUDIO_CGB;
}
GBMemoryDeserialize(&gb->memory, state);
GBIODeserialize(gb, state);
GBVideoDeserialize(&gb->video, state);
GBTimerDeserialize(&gb->timer, state);
GBAudioDeserialize(&gb->audio, state);
gb->cpu->memory.setActiveRegion(gb->cpu, gb->cpu->pc);
return true;
}
void GBMemoryDeserialize(struct GB* gb, const struct GBSerializedState* state) {
struct GBMemory* memory = &gb->memory;
memcpy(memory->wram, state->wram, GB_SIZE_WORKING_RAM);
memcpy(memory->hram, state->hram, GB_SIZE_HRAM);
LOAD_16LE(memory->currentBank, 0, &state->memory.currentBank);
memory->wramCurrentBank = state->memory.wramCurrentBank;
memory->sramCurrentBank = state->memory.sramCurrentBank;
GBMBCSwitchBank(gb, memory->currentBank);
GBMemorySwitchWramBank(memory, memory->wramCurrentBank);
GBMBCSwitchSramBank(gb, memory->sramCurrentBank);
LOAD_16LE(memory->dmaSource, 0, &state->memory.dmaSource);
LOAD_16LE(memory->dmaDest, 0, &state->memory.dmaDest);
LOAD_16LE(memory->hdmaSource, 0, &state->memory.hdmaSource);
LOAD_16LE(memory->hdmaDest, 0, &state->memory.hdmaDest);
LOAD_16LE(memory->hdmaRemaining, 0, &state->memory.hdmaRemaining);
memory->dmaRemaining = state->memory.dmaRemaining;
memcpy(memory->rtcRegs, state->memory.rtcRegs, sizeof(state->memory.rtcRegs));
uint32_t when;
LOAD_32LE(when, 0, &state->memory.dmaNext);
if (memory->dmaRemaining) {
mTimingSchedule(&gb->timing, &memory->dmaEvent, when);
}
LOAD_32LE(when, 0, &state->memory.hdmaNext);
if (memory->hdmaRemaining) {
mTimingSchedule(&gb->timing, &memory->hdmaEvent, when);
}
GBSerializedMemoryFlags flags;
LOAD_16LE(flags, 0, &state->memory.flags);
memory->sramAccess = GBSerializedMemoryFlagsGetSramAccess(flags);
memory->rtcAccess = GBSerializedMemoryFlagsGetRtcAccess(flags);
memory->rtcLatched = GBSerializedMemoryFlagsGetRtcLatched(flags);
memory->ime = GBSerializedMemoryFlagsGetIme(flags);
memory->isHdma = GBSerializedMemoryFlagsGetIsHdma(flags);
memory->activeRtcReg = GBSerializedMemoryFlagsGetActiveRtcReg(flags);
switch (memory->mbcType) {
case GB_MBC1:
memory->mbcState.mbc1.mode = state->memory.mbc1.mode;
memory->mbcState.mbc1.multicartStride = state->memory.mbc1.multicartStride;
if (memory->mbcState.mbc1.mode) {
GBMBCSwitchBank0(gb, memory->currentBank >> memory->mbcState.mbc1.multicartStride);
}
break;
case GB_MBC3_RTC:
LOAD_64LE(gb->memory.rtcLastLatch, 0, &state->memory.rtc.lastLatch);
break;
case GB_MBC7:
memory->mbcState.mbc7.state = state->memory.mbc7.state;
memory->mbcState.mbc7.eeprom = state->memory.mbc7.eeprom;
memory->mbcState.mbc7.address = state->memory.mbc7.address & 0x7F;
memory->mbcState.mbc7.access = state->memory.mbc7.access;
memory->mbcState.mbc7.latch = state->memory.mbc7.latch;
memory->mbcState.mbc7.srBits = state->memory.mbc7.srBits;
LOAD_16LE(memory->mbcState.mbc7.sr, 0, &state->memory.mbc7.sr);
LOAD_32LE(memory->mbcState.mbc7.writable, 0, &state->memory.mbc7.writable);
break;
default:
break;
}