87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/***
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Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: Compression.cpp
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Date: 2021-6-17
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Author: Reece
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***/
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#include <RuntimeInternal.hpp>
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#include "Compression.hpp"
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#include "zstd.h"
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namespace Aurora::Compression
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{
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AUKN_SYM bool Compress(const void *buffer, AuUInt32 length, AuList<AuUInt8> &out, int compressionLevel )
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{
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if (!AuTryResize(out, length))
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{
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return false;
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}
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auto ret = ZSTD_compress(&out[0], out.size(), buffer, length, compressionLevel);
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if (ZSTD_isError(ret))
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{
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return false;
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}
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out.resize(ret);
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return true;
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}
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AUKN_SYM bool Compress(const AuList<AuUInt8> &in, AuList<AuUInt8> &out, int compressionLevel)
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{
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return Compress(in.data(), in.size(), out, compressionLevel);
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}
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AUKN_SYM bool Decompress(const void *buffer, AuUInt32 length, AuList<AuUInt8> &out)
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{
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AuUInt32 read = 0;
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while (read != length)
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{
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auto startPtr = reinterpret_cast<const AuUInt8 *>(buffer) + read;
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auto deflatedLength = ZSTD_findFrameCompressedSize(startPtr, length - read);
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auto inflatedLength = ZSTD_getFrameContentSize(startPtr, length - read);
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if (inflatedLength == ZSTD_CONTENTSIZE_ERROR)
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{
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return false;
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}
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if (inflatedLength == ZSTD_CONTENTSIZE_UNKNOWN)
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{
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return false;
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}
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if (ZSTD_isError(inflatedLength))
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{
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return false;
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}
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auto startingSize = out.size();
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if (!AuTryResize(out, inflatedLength))
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{
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return false;
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}
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auto ret = ZSTD_decompress(&out[0], out.size(), buffer, length);
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if (ZSTD_isError(ret))
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{
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return false;
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}
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out.resize(startingSize + ret);
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read += deflatedLength;
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}
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return true;
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}
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AUKN_SYM bool Decompress(const AuList<AuUInt8> &in, AuList<AuUInt8> &out)
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{
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return Decompress(in.data(), in.size(), out);
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}
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} |