metaforce/Runtime/Streams/CZipInputStream.cpp

27 lines
983 B
C++

#include "CZipInputStream.hpp"
namespace metaforce {
CZipInputStream::CZipInputStream(std::unique_ptr<CInputStream>&& strm)
: CInputStream(4096), x24_compBuf(new u8[4096]), x28_strm(std::move(strm)) {
x30_zstrm = std::make_unique<z_stream>();
x30_zstrm->next_in = x24_compBuf.get();
x30_zstrm->avail_in = 0;
x30_zstrm->zalloc = [](void*, u32 c, u32 n) -> void* { return new u8[size_t{c} * size_t{n}]; };
x30_zstrm->zfree = [](void*, void* buf) { delete[] static_cast<u8*>(buf); };
inflateInit(x30_zstrm.get());
}
CZipInputStream::~CZipInputStream() { inflateEnd(x30_zstrm.get()); }
u32 CZipInputStream::Read(void* buf, u32 len) {
x30_zstrm->next_out = static_cast<Bytef *>(buf);
x30_zstrm->avail_out = len;
if (x30_zstrm->avail_in == 0) {
x30_zstrm->avail_in = x28_strm->ReadBytes(x24_compBuf.get(),4096);
x30_zstrm->next_in = x24_compBuf.get();
}
inflate(x30_zstrm.get(), Z_NO_FLUSH);
return len - x30_zstrm->avail_out;
}
} // namespace metaforce