82 lines
1.6 KiB
C++
82 lines
1.6 KiB
C++
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#include "quam/wad.h"
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namespace Wad {
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enum Compression {
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CompressNone,
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CompressLZSS,
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};
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}
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struct WadHeader {
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quint32 dirOffset;
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quint32 dirNum;
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};
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struct WadEntry {
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std::string name;
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Arc::FileType type;
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ArcFile file;
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};
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static WadHeader readWadHeader(std::istream &st) {
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auto magic = readBytes<4>(st);
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if(magic != std::array{'W', 'A', 'D', '2'}) {
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throw std::runtime_error("not a wad2 file (invalid magic number)");
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}
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WadHeader hdr;
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hdr.dirOffset = readLE<quint32>(st);
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hdr.dirNum = readLE<quint32>(st);
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return hdr;
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}
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static WadEntry readWadEntry(std::istream &st) {
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auto entOffset = readLE<quint32>(st);
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auto entSize = readLE<quint32>(st);
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auto entCSize = readLE<quint32>(st);
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auto entType = readByte(st);
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auto entCompr = readByte(st);
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/* padding */ readBytes<2>(st);
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auto entName = readBytes<16>(st);
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if(entSize != entCSize || entCompr != Wad::CompressNone) {
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throw std::runtime_error("compressed files not implemented");
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}
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auto pos = st.tellg();
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st.seekg(entOffset);
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ArcFile file;
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file.resize(entSize);
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st.read(file.data(), entSize);
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st.seekg(pos);
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WadEntry ent;
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ent.name = ntbsToString(entName);
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ent.file = std::move(file);
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ent.type = Arc::getFileType(entType);
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return ent;
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}
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ArcDir readWad(std::istream &st) {
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auto hdr = readWadHeader(st);
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st.seekg(hdr.dirOffset);
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ArcDir root;
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for(quint32 i = 0; i < hdr.dirNum; i++) {
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auto ent = readWadEntry(st);
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if(root.findNode(ent.name) != root.end()) {
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throw std::runtime_error("duplicate file");
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}
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root.emplace_back(std::move(ent.file), std::move(ent.name), ent.type);
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}
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return root;
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}
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// EOF
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