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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/zlib/zlib.h>
using namespace NBlockCodecs;
namespace {
struct TZLibCodec: public TAddLengthCodec<TZLibCodec> {
inline TZLibCodec(int level)
: MyName("zlib-" + ToString(level))
, Level(level)
{
}
static inline size_t DoMaxCompressedLength(size_t in) noexcept {
return compressBound(in);
}
TStringBuf Name() const noexcept override {
return MyName;
}
inline size_t DoCompress(const TData& in, void* buf) const {
//TRASH detected
uLong ret = Max<unsigned int>();
int cres = compress2((Bytef*)buf, &ret, (const Bytef*)in.data(), in.size(), Level);
if (cres != Z_OK) {
ythrow TCompressError(cres);
}
return ret;
}
inline void DoDecompress(const TData& in, void* out, size_t len) const {
uLong ret = len;
int uncres = uncompress((Bytef*)out, &ret, (const Bytef*)in.data(), in.size());
if (uncres != Z_OK) {
ythrow TDecompressError(uncres);
}
if (ret != len) {
ythrow TDecompressError(len, ret);
}
}
const TString MyName;
const int Level;
};
struct TZLibRegistrar {
TZLibRegistrar() {
for (int i = 0; i < 10; ++i) {
RegisterCodec(MakeHolder<TZLibCodec>(i));
}
RegisterAlias("zlib", "zlib-6");
}
};
const TZLibRegistrar Registrar{};
}
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