metaforce/Runtime/IOStreams.hpp

75 lines
1.8 KiB
C++

#pragma once
#include <memory>
#include "Runtime/GCNTypes.hpp"
#include <athena/IStreamReader.hpp>
#include <athena/IStreamWriter.hpp>
#include <athena/MemoryReader.hpp>
#include <athena/MemoryWriter.hpp>
#ifdef URDE_ZIP_INPUT_STREAM
#include <zlib.h>
#endif
namespace urde {
using CInputStream = athena::io::IStreamReader;
using COutputStream = athena::io::IStreamWriter;
struct CBitStreamReader : athena::io::MemoryReader {
u32 x1c_val = 0;
u32 x20_bitOffset = 0;
public:
static constexpr u32 GetBitCount(u32 maxVal) {
u32 ret = 0;
while (maxVal != 0) {
maxVal /= 2;
ret++;
}
return ret;
}
CBitStreamReader(const void* data, atUint64 length) : MemoryReader(data, length) {}
s32 ReadEncoded(u32 key);
};
class CBitStreamWriter : public athena::io::MemoryWriter {
u32 x14_val = 0;
u32 x18_bitOffset = 0x20;
public:
static constexpr u32 GetBitCount(u32 maxVal) { return CBitStreamReader::GetBitCount(maxVal); }
CBitStreamWriter(atUint8* data = nullptr, atUint64 length = 0x10) : MemoryWriter(data, length) {}
void WriteEncoded(u32 val, u32 bitCount);
void Flush();
~CBitStreamWriter() override { Flush(); }
};
using CMemoryInStream = athena::io::MemoryReader;
using CMemoryOutStream = athena::io::MemoryWriter;
#ifdef URDE_ZIP_INPUT_STREAM
class CZipInputStream : public CInputStream {
std::unique_ptr<u8[]> x24_compBuf;
std::unique_ptr<CInputStream> x28_strm;
z_stream x30_zstrm = {};
public:
CZipInputStream(std::unique_ptr<CInputStream>&& strm);
~CZipInputStream() override;
atUint64 readUBytesToBuf(void* buf, atUint64 len) override;
void seek(atInt64, athena::SeekOrigin) override {}
atUint64 position() const override { return 0; }
atUint64 length() const override { return 0; }
};
#endif
} // namespace urde