mirror of https://github.com/bsnes-emu/bsnes.git
102 lines
3.8 KiB
C++
102 lines
3.8 KiB
C++
#pragma once
|
|
|
|
//creates uncompressed ZIP archives
|
|
|
|
#include <nall/string.hpp>
|
|
#include <nall/hash/crc32.hpp>
|
|
|
|
namespace nall { namespace Encode {
|
|
|
|
struct ZIP {
|
|
ZIP(const string& filename) {
|
|
fp.open(filename, file::mode::write);
|
|
timestamp = time(nullptr);
|
|
}
|
|
|
|
//append path: append("path/");
|
|
//append file: append("path/file", data, size);
|
|
auto append(string filename, const uint8_t* data = nullptr, uint size = 0u, time_t timestamp = 0) -> void {
|
|
filename.transform("\\", "/");
|
|
if(!timestamp) timestamp = this->timestamp;
|
|
uint32_t checksum = Hash::CRC32(data, size).digest().hex();
|
|
directory.append({filename, timestamp, checksum, size, fp.offset()});
|
|
|
|
fp.writel(0x04034b50, 4); //signature
|
|
fp.writel(0x0014, 2); //minimum version (2.0)
|
|
fp.writel(0x0000, 2); //general purpose bit flags
|
|
fp.writel(0x0000, 2); //compression method (0 = uncompressed)
|
|
fp.writel(makeTime(timestamp), 2);
|
|
fp.writel(makeDate(timestamp), 2);
|
|
fp.writel(checksum, 4);
|
|
fp.writel(size, 4); //compressed size
|
|
fp.writel(size, 4); //uncompressed size
|
|
fp.writel(filename.length(), 2); //file name length
|
|
fp.writel(0x0000, 2); //extra field length
|
|
fp.print(filename); //file name
|
|
|
|
fp.write(data, size); //file data
|
|
}
|
|
|
|
~ZIP() {
|
|
//central directory
|
|
uint baseOffset = fp.offset();
|
|
for(auto& entry : directory) {
|
|
fp.writel(0x02014b50, 4); //signature
|
|
fp.writel(0x0014, 2); //version made by (2.0)
|
|
fp.writel(0x0014, 2); //version needed to extract (2.0)
|
|
fp.writel(0x0000, 2); //general purpose bit flags
|
|
fp.writel(0x0000, 2); //compression method (0 = uncompressed)
|
|
fp.writel(makeTime(entry.timestamp), 2);
|
|
fp.writel(makeDate(entry.timestamp), 2);
|
|
fp.writel(entry.checksum, 4);
|
|
fp.writel(entry.size, 4); //compressed size
|
|
fp.writel(entry.size, 4); //uncompressed size
|
|
fp.writel(entry.filename.length(), 2); //file name length
|
|
fp.writel(0x0000, 2); //extra field length
|
|
fp.writel(0x0000, 2); //file comment length
|
|
fp.writel(0x0000, 2); //disk number start
|
|
fp.writel(0x0000, 2); //internal file attributes
|
|
fp.writel(0x00000000, 4); //external file attributes
|
|
fp.writel(entry.offset, 4); //relative offset of file header
|
|
fp.print(entry.filename);
|
|
}
|
|
uint finishOffset = fp.offset();
|
|
|
|
//end of central directory
|
|
fp.writel(0x06054b50, 4); //signature
|
|
fp.writel(0x0000, 2); //number of this disk
|
|
fp.writel(0x0000, 2); //disk where central directory starts
|
|
fp.writel(directory.size(), 2); //number of central directory records on this disk
|
|
fp.writel(directory.size(), 2); //total number of central directory records
|
|
fp.writel(finishOffset - baseOffset, 4); //size of central directory
|
|
fp.writel(baseOffset, 4); //offset of central directory
|
|
fp.writel(0x0000, 2); //comment length
|
|
|
|
fp.close();
|
|
}
|
|
|
|
protected:
|
|
auto makeTime(time_t timestamp) -> uint16_t {
|
|
tm* info = localtime(×tamp);
|
|
return (info->tm_hour << 11) | (info->tm_min << 5) | (info->tm_sec >> 1);
|
|
}
|
|
|
|
auto makeDate(time_t timestamp) -> uint16_t {
|
|
tm* info = localtime(×tamp);
|
|
return ((info->tm_year - 80) << 9) | ((1 + info->tm_mon) << 5) + (info->tm_mday);
|
|
}
|
|
|
|
file fp;
|
|
time_t timestamp;
|
|
struct entry_t {
|
|
string filename;
|
|
time_t timestamp;
|
|
uint32_t checksum;
|
|
uint32_t size;
|
|
uint32_t offset;
|
|
};
|
|
vector<entry_t> directory;
|
|
};
|
|
|
|
}}
|