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#include <library/cpp/blockcodecs/core/codecs.h>
#include <library/cpp/blockcodecs/core/common.h>
#include <library/cpp/blockcodecs/core/register.h>
#include <contrib/libs/zstd06/common/zstd.h>
#include <contrib/libs/zstd06/common/zstd_static.h>
using namespace NBlockCodecs;
namespace {
struct TZStd06Codec: public TAddLengthCodec<TZStd06Codec> {
inline TZStd06Codec(unsigned level)
: Level(level)
, MyName(TStringBuf("zstd06_") + ToString(Level))
{
}
static inline size_t CheckError(size_t ret, const char* what) {
if (ZSTD_isError(ret)) {
ythrow yexception() << what << TStringBuf(" zstd error: ") << ZSTD_getErrorName(ret);
}
return ret;
}
static inline size_t DoMaxCompressedLength(size_t l) noexcept {
return ZSTD_compressBound(l);
}
inline size_t DoCompress(const TData& in, void* out) const {
return CheckError(ZSTD_compress(out, DoMaxCompressedLength(in.size()), in.data(), in.size(), Level), "compress");
}
inline void DoDecompress(const TData& in, void* out, size_t dsize) const {
const size_t res = CheckError(ZSTD_decompress(out, dsize, in.data(), in.size()), "decompress");
if (res != dsize) {
ythrow TDecompressError(dsize, res);
}
}
TStringBuf Name() const noexcept override {
return MyName;
}
const unsigned Level;
const TString MyName;
};
struct TZStd06Registrar {
TZStd06Registrar() {
for (unsigned i = 1; i <= ZSTD_maxCLevel(); ++i) {
RegisterCodec(MakeHolder<TZStd06Codec>(i));
}
}
};
const TZStd06Registrar Registrar{};
}
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