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GBA Savedata: Fix savedata unmasking (fixes #441)

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This commit is contained in:
Vicki Pfau 2017-01-31 00:34:40 -08:00
parent c9dbbee246
commit dc317e952e
2 changed files with 22 additions and 24 deletions
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1
CHANGES
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@ -19,6 +19,7 @@ Bugfixes:
- LR35902: Fix pc overflowing current region off-by-one
- GB MBC: Fix ROM bank overflows getting set to bank 0
- Qt: Fix timing issues on high refresh rate monitors
- GBA Savedata: Fix savedata unmasking (fixes mgba.io/i/441)
Misc:
- SDL: Remove scancode key input
- GBA Video: Clean up unused timers

45
src/gba/savedata.c
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@ -160,39 +160,35 @@ size_t GBASavedataSize(struct GBASavedata* savedata) {
}
bool GBASavedataLoad(struct GBASavedata* savedata, struct VFile* in) {
if (savedata->vf) {
if (savedata->data) {
if (!in && savedata->type != SAVEDATA_FORCE_NONE) {
return false;
}
ssize_t size = GBASavedataSize(savedata);
in->seek(in, 0, SEEK_SET);
return in->read(in, savedata->data, size) == size;
} else if (savedata->vf) {
off_t read = 0;
uint8_t buffer[2048];
memset(buffer, 0xFF, sizeof(buffer));
savedata->vf->seek(savedata->vf, 0, SEEK_SET);
while (savedata->vf->seek(savedata->vf, 0, SEEK_CUR) < savedata->vf->size(savedata->vf)) {
savedata->vf->write(savedata->vf, buffer, sizeof(buffer));
}
savedata->vf->seek(savedata->vf, 0, SEEK_SET);
if (in) {
in->seek(in, 0, SEEK_SET);
do {
read = in->read(in, buffer, sizeof(buffer));
read = savedata->vf->write(savedata->vf, buffer, read);
} while (read == sizeof(buffer));
}
memset(buffer, 0xFF, sizeof(buffer));
ssize_t fsize = savedata->vf->size(savedata->vf);
ssize_t pos = savedata->vf->seek(savedata->vf, 0, SEEK_CUR);
while (fsize - pos >= (ssize_t) sizeof(buffer)) {
savedata->vf->write(savedata->vf, buffer, sizeof(buffer));
pos = savedata->vf->seek(savedata->vf, 0, SEEK_CUR);
}
if (fsize - pos > 0) {
savedata->vf->write(savedata->vf, buffer, fsize - pos);
}
return read >= 0;
} else if (savedata->data) {
if (!in && savedata->type != SAVEDATA_FORCE_NONE) {
return false;
}
switch (savedata->type) {
case SAVEDATA_SRAM:
return in->read(in, savedata->data, SIZE_CART_SRAM) == SIZE_CART_SRAM;
case SAVEDATA_FLASH512:
return in->read(in, savedata->data, SIZE_CART_FLASH512) == SIZE_CART_FLASH512;
case SAVEDATA_FLASH1M:
return in->read(in, savedata->data, SIZE_CART_FLASH1M) == SIZE_CART_FLASH1M;
case SAVEDATA_EEPROM:
return in->read(in, savedata->data, SIZE_CART_EEPROM) == SIZE_CART_EEPROM;
case SAVEDATA_AUTODETECT:
case SAVEDATA_FORCE_NONE:
return true;
}
}
return true;
}
@ -560,8 +556,9 @@ void _flashSwitchBank(struct GBASavedata* savedata, int bank) {
mLOG(GBA_SAVE, DEBUG, "Performing flash bank switch to bank %i", bank);
savedata->currentBank = &savedata->data[bank << 16];
if (bank > 0 && savedata->type == SAVEDATA_FLASH512) {
mLOG(GBA_SAVE, INFO, "Updating flash chip from 512kb to 1Mb");
savedata->type = SAVEDATA_FLASH1M;
if (savedata->vf) {
if (savedata->vf && savedata->vf->size(savedata->vf) == SIZE_CART_FLASH512) {
savedata->vf->truncate(savedata->vf, SIZE_CART_FLASH1M);
memset(&savedata->data[SIZE_CART_FLASH512], 0xFF, SIZE_CART_FLASH512);
}