mirror of https://github.com/bsnes-emu/bsnes.git
137 lines
3.2 KiB
C++
137 lines
3.2 KiB
C++
#pragma once
|
|
|
|
#include <nall/filemap.hpp>
|
|
#include <nall/string.hpp>
|
|
#include <nall/vector.hpp>
|
|
#include <nall/decode/inflate.hpp>
|
|
|
|
namespace nall { namespace Decode {
|
|
|
|
struct ZIP {
|
|
struct File {
|
|
string name;
|
|
const uint8_t* data;
|
|
uint size;
|
|
uint csize;
|
|
uint cmode; //0 = uncompressed, 8 = deflate
|
|
uint crc32;
|
|
time_t timestamp;
|
|
};
|
|
|
|
~ZIP() {
|
|
close();
|
|
}
|
|
|
|
auto open(const string& filename) -> bool {
|
|
close();
|
|
if(fm.open(filename, filemap::mode::read) == false) return false;
|
|
if(open(fm.data(), fm.size()) == false) {
|
|
fm.close();
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
auto open(const uint8_t* data, uint size) -> bool {
|
|
if(size < 22) return false;
|
|
|
|
filedata = data;
|
|
filesize = size;
|
|
|
|
file.reset();
|
|
|
|
const uint8_t* footer = data + size - 22;
|
|
while(true) {
|
|
if(footer <= data + 22) return false;
|
|
if(read(footer, 4) == 0x06054b50) {
|
|
uint commentlength = read(footer + 20, 2);
|
|
if(footer + 22 + commentlength == data + size) break;
|
|
}
|
|
footer--;
|
|
}
|
|
const uint8_t* directory = data + read(footer + 16, 4);
|
|
|
|
while(true) {
|
|
uint signature = read(directory + 0, 4);
|
|
if(signature != 0x02014b50) break;
|
|
|
|
File file;
|
|
file.cmode = read(directory + 10, 2);
|
|
file.crc32 = read(directory + 16, 4);
|
|
file.csize = read(directory + 20, 4);
|
|
file.size = read(directory + 24, 4);
|
|
|
|
uint16_t dosTime = read(directory + 12, 2);
|
|
uint16_t dosDate = read(directory + 14, 2);
|
|
tm info = {};
|
|
info.tm_sec = (dosTime >> 0 & 31) << 1;
|
|
info.tm_min = (dosTime >> 5 & 63);
|
|
info.tm_hour = (dosTime >> 11 & 31);
|
|
info.tm_mday = (dosDate >> 0 & 31);
|
|
info.tm_mon = (dosDate >> 5 & 15) - 1;
|
|
info.tm_year = (dosDate >> 9 & 127) + 80;
|
|
info.tm_isdst = -1;
|
|
file.timestamp = mktime(&info);
|
|
|
|
uint namelength = read(directory + 28, 2);
|
|
uint extralength = read(directory + 30, 2);
|
|
uint commentlength = read(directory + 32, 2);
|
|
|
|
char* filename = new char[namelength + 1];
|
|
memcpy(filename, directory + 46, namelength);
|
|
filename[namelength] = 0;
|
|
file.name = filename;
|
|
delete[] filename;
|
|
|
|
uint offset = read(directory + 42, 4);
|
|
uint offsetNL = read(data + offset + 26, 2);
|
|
uint offsetEL = read(data + offset + 28, 2);
|
|
file.data = data + offset + 30 + offsetNL + offsetEL;
|
|
|
|
directory += 46 + namelength + extralength + commentlength;
|
|
|
|
this->file.append(file);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
auto extract(File& file) -> vector<uint8_t> {
|
|
vector<uint8_t> buffer;
|
|
|
|
if(file.cmode == 0) {
|
|
buffer.resize(file.size);
|
|
memcpy(buffer.data(), file.data, file.size);
|
|
}
|
|
|
|
if(file.cmode == 8) {
|
|
buffer.resize(file.size);
|
|
if(inflate(buffer.data(), buffer.size(), file.data, file.csize) == false) {
|
|
buffer.reset();
|
|
}
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
auto close() -> void {
|
|
if(fm.open()) fm.close();
|
|
}
|
|
|
|
protected:
|
|
filemap fm;
|
|
const uint8_t* filedata;
|
|
uint filesize;
|
|
|
|
auto read(const uint8_t* data, uint size) -> uint {
|
|
uint result = 0, shift = 0;
|
|
while(size--) { result |= *data++ << shift; shift += 8; }
|
|
return result;
|
|
}
|
|
|
|
public:
|
|
vector<File> file;
|
|
};
|
|
|
|
}}
|