mirror of
https://github.com/libretro/bsnes-libretro.git
synced 2024-11-24 01:19:50 +00:00
94b2538af5
byuu says: Basically just a project rename, with s/bsnes/higan and the new icon from lowkee added in. It won't compile on Windows because I forgot to update the resource.rc file, and a path transform command isn't working on Windows. It was really just meant as a starting point, so that v091 WIPs can flow starting from .00 with the new name (it overshadows bsnes v091, so publicly speaking this "shouldn't exist" and will probably be deleted from Google Code when v092 is ready.)
101 lines
2.4 KiB
C++
Executable File
101 lines
2.4 KiB
C++
Executable File
#ifndef NALL_IPS_HPP
|
|
#define NALL_IPS_HPP
|
|
|
|
#include <nall/file.hpp>
|
|
#include <nall/stdint.hpp>
|
|
#include <nall/string.hpp>
|
|
|
|
namespace nall {
|
|
|
|
struct ips {
|
|
inline bool apply();
|
|
inline void source(const uint8_t *data, unsigned size);
|
|
inline void modify(const uint8_t *data, unsigned size);
|
|
inline ips();
|
|
inline ~ips();
|
|
|
|
uint8_t *data;
|
|
unsigned size;
|
|
const uint8_t *sourceData;
|
|
unsigned sourceSize;
|
|
const uint8_t *modifyData;
|
|
unsigned modifySize;
|
|
};
|
|
|
|
bool ips::apply() {
|
|
if(modifySize < 8) return false;
|
|
if(modifyData[0] != 'P') return false;
|
|
if(modifyData[1] != 'A') return false;
|
|
if(modifyData[2] != 'T') return false;
|
|
if(modifyData[3] != 'C') return false;
|
|
if(modifyData[4] != 'H') return false;
|
|
|
|
if(data) delete[] data;
|
|
data = new uint8_t[16 * 1024 * 1024 + 65536](); //maximum size of IPS patch + single-tag padding
|
|
size = sourceSize;
|
|
memcpy(data, sourceData, sourceSize);
|
|
unsigned offset = 5;
|
|
|
|
while(true) {
|
|
unsigned address, length;
|
|
|
|
if(offset > modifySize - 3) break;
|
|
address = modifyData[offset++] << 16;
|
|
address |= modifyData[offset++] << 8;
|
|
address |= modifyData[offset++] << 0;
|
|
|
|
if(address == 0x454f46) { //EOF
|
|
if(offset == modifySize) return true;
|
|
if(offset == modifySize - 3) {
|
|
size = modifyData[offset++] << 16;
|
|
size |= modifyData[offset++] << 8;
|
|
size |= modifyData[offset++] << 0;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if(offset > modifySize - 2) break;
|
|
length = modifyData[offset++] << 8;
|
|
length |= modifyData[offset++] << 0;
|
|
|
|
if(length) { //Copy
|
|
if(offset > modifySize - length) break;
|
|
while(length--) data[address++] = modifyData[offset++];
|
|
} else { //RLE
|
|
if(offset > modifySize - 3) break;
|
|
length = modifyData[offset++] << 8;
|
|
length |= modifyData[offset++] << 0;
|
|
if(length == 0) break; //illegal
|
|
while(length--) data[address++] = modifyData[offset];
|
|
offset++;
|
|
}
|
|
|
|
size = max(size, address);
|
|
}
|
|
|
|
delete[] data;
|
|
data = nullptr;
|
|
return false;
|
|
}
|
|
|
|
void ips::source(const uint8_t *data, unsigned size) {
|
|
sourceData = data, sourceSize = size;
|
|
}
|
|
|
|
void ips::modify(const uint8_t *data, unsigned size) {
|
|
modifyData = data, modifySize = size;
|
|
}
|
|
|
|
ips::ips() : data(nullptr), sourceData(nullptr), modifyData(nullptr) {
|
|
}
|
|
|
|
ips::~ips() {
|
|
if(data) delete[] data;
|
|
if(sourceData) delete[] sourceData;
|
|
if(modifyData) delete[] modifyData;
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|