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GB: Add patch support

This commit is contained in:
Jeffrey Pfau 2016-02-06 02:30:58 -08:00
parent a712216c2e
commit 3ade5188db
2 changed files with 28 additions and 5 deletions
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15
src/gb/core.c
View File

@ -9,6 +9,7 @@
#include "gb/gb.h"
#include "gb/renderers/software.h"
#include "util/memory.h"
#include "util/patch.h"
struct GBCore {
struct mCore d;
@ -97,11 +98,15 @@ static bool _GBCoreLoadSave(struct mCore* core, struct VFile* vf) {
}
static bool _GBCoreLoadPatch(struct mCore* core, struct VFile* vf) {
// TODO
UNUSED(core);
UNUSED(vf);
mLOG(GB, STUB, "Patches are not yet supported");
return false;
if (!vf) {
return false;
}
struct Patch patch;
if (!loadPatch(vf, &patch)) {
return false;
}
GBApplyPatch(core->board, &patch);
return true;
}
static void _GBCoreUnloadROM(struct mCore* core) {

18
src/gb/gb.c
View File

@ -126,6 +126,24 @@ void GBUnloadROM(struct GB* gb) {
gb->memory.sram = 0;
}
void GBApplyPatch(struct GB* gb, struct Patch* patch) {
size_t patchedSize = patch->outputSize(patch, gb->memory.romSize);
if (!patchedSize) {
return;
}
if (patchedSize > 0x400000) {
patchedSize = 0x400000;
}
gb->memory.rom = anonymousMemoryMap(0x400000);
if (!patch->applyPatch(patch, gb->pristineRom, gb->pristineRomSize, gb->memory.rom, patchedSize)) {
mappedMemoryFree(gb->memory.rom, patchedSize);
gb->memory.rom = gb->pristineRom;
return;
}
gb->memory.romSize = patchedSize;
gb->romCrc32 = doCrc32(gb->memory.rom, gb->memory.romSize);
}
void GBDestroy(struct GB* gb) {
GBUnloadROM(gb);