mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-04-02 10:42:14 -04:00
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.)
126 lines
2.8 KiB
C++
Executable file
126 lines
2.8 KiB
C++
Executable file
#ifndef NALL_UNZIP_HPP
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#define NALL_UNZIP_HPP
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#include <nall/filemap.hpp>
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#include <nall/inflate.hpp>
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#include <nall/string.hpp>
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#include <nall/vector.hpp>
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namespace nall {
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struct unzip {
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struct File {
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string name;
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const uint8_t *data;
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unsigned size;
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unsigned csize;
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unsigned cmode; //0 = uncompressed, 8 = deflate
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unsigned crc32;
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};
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inline bool open(const string &filename) {
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close();
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if(fm.open(filename, filemap::mode::read) == false) return false;
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if(open(fm.data(), fm.size()) == false) {
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fm.close();
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return false;
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}
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return true;
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}
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inline bool open(const uint8_t *data, unsigned size) {
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if(size < 22) return false;
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filedata = data;
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filesize = size;
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file.reset();
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const uint8_t *footer = data + size - 22;
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while(true) {
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if(footer <= data + 22) return false;
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if(read(footer, 4) == 0x06054b50) {
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unsigned commentlength = read(footer + 20, 2);
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if(footer + 22 + commentlength == data + size) break;
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}
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footer--;
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}
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const uint8_t *directory = data + read(footer + 16, 4);
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while(true) {
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unsigned signature = read(directory + 0, 4);
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if(signature != 0x02014b50) break;
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File file;
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file.cmode = read(directory + 10, 2);
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file.crc32 = read(directory + 16, 4);
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file.csize = read(directory + 20, 4);
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file.size = read(directory + 24, 4);
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unsigned namelength = read(directory + 28, 2);
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unsigned extralength = read(directory + 30, 2);
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unsigned commentlength = read(directory + 32, 2);
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char *filename = new char[namelength + 1];
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memcpy(filename, directory + 46, namelength);
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filename[namelength] = 0;
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file.name = filename;
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delete[] filename;
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unsigned offset = read(directory + 42, 4);
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unsigned offsetNL = read(data + offset + 26, 2);
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unsigned offsetEL = read(data + offset + 28, 2);
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file.data = data + offset + 30 + offsetNL + offsetEL;
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directory += 46 + namelength + extralength + commentlength;
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this->file.append(file);
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}
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return true;
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}
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inline vector<uint8_t> extract(File &file) {
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vector<uint8_t> buffer;
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if(file.cmode == 0) {
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buffer.resize(file.size);
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memcpy(buffer.data(), file.data, file.size);
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}
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if(file.cmode == 8) {
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buffer.resize(file.size);
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if(inflate(buffer.data(), buffer.size(), file.data, file.csize) == false) {
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buffer.reset();
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}
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}
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return buffer;
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}
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inline void close() {
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if(fm.open()) fm.close();
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}
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~unzip() {
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close();
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}
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protected:
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filemap fm;
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const uint8_t *filedata;
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unsigned filesize;
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unsigned read(const uint8_t *data, unsigned size) {
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unsigned result = 0, shift = 0;
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while(size--) { result |= *data++ << shift; shift += 8; }
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return result;
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}
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public:
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vector<File> file;
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};
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}
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#endif
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