mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-03-27 05:52:36 +01:00
0d0af39b44
byuu says: This is a few days old, but oh well. This WIP changes nall,hiro,ruby,icarus back to (u)int(8,16,32,64)_t. I'm slowly pushing for (u)int(8,16,32,64) to use my custom Integer<Size>/Natural<Size> classes instead. But it's going to be one hell of a struggle to get that into higan.
79 lines
1.6 KiB
C++
79 lines
1.6 KiB
C++
#pragma once
|
|
|
|
#include <nall/file.hpp>
|
|
#include <nall/decode/inflate.hpp>
|
|
|
|
namespace nall { namespace Decode {
|
|
|
|
struct GZIP {
|
|
inline ~GZIP();
|
|
|
|
inline auto decompress(const string& filename) -> bool;
|
|
inline auto decompress(const uint8_t* data, uint size) -> bool;
|
|
|
|
string filename;
|
|
uint8_t* data = nullptr;
|
|
uint size = 0;
|
|
};
|
|
|
|
GZIP::~GZIP() {
|
|
if(data) delete[] data;
|
|
}
|
|
|
|
auto GZIP::decompress(const string& filename) -> bool {
|
|
if(auto memory = file::read(filename)) {
|
|
return decompress(memory.data(), memory.size());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
auto GZIP::decompress(const uint8_t* data, uint size) -> bool {
|
|
if(size < 18) return false;
|
|
if(data[0] != 0x1f) return false;
|
|
if(data[1] != 0x8b) return false;
|
|
uint cm = data[2];
|
|
uint flg = data[3];
|
|
uint mtime = data[4];
|
|
mtime |= data[5] << 8;
|
|
mtime |= data[6] << 16;
|
|
mtime |= data[7] << 24;
|
|
uint xfl = data[8];
|
|
uint os = data[9];
|
|
uint p = 10;
|
|
uint isize = data[size - 4];
|
|
isize |= data[size - 3] << 8;
|
|
isize |= data[size - 2] << 16;
|
|
isize |= data[size - 1] << 24;
|
|
filename = "";
|
|
|
|
if(flg & 0x04) { //FEXTRA
|
|
uint xlen = data[p + 0];
|
|
xlen |= data[p + 1] << 8;
|
|
p += 2 + xlen;
|
|
}
|
|
|
|
if(flg & 0x08) { //FNAME
|
|
char buffer[PATH_MAX];
|
|
for(uint n = 0; n < PATH_MAX; n++, p++) {
|
|
buffer[n] = data[p];
|
|
if(data[p] == 0) break;
|
|
}
|
|
if(data[p++]) return false;
|
|
filename = buffer;
|
|
}
|
|
|
|
if(flg & 0x10) { //FCOMMENT
|
|
while(data[p++]);
|
|
}
|
|
|
|
if(flg & 0x02) { //FHCRC
|
|
p += 2;
|
|
}
|
|
|
|
this->size = isize;
|
|
this->data = new uint8_t[this->size];
|
|
return inflate(this->data, this->size, data + p, size - p - 8);
|
|
}
|
|
|
|
}}
|