remove spurious compression definitions
This commit is contained in:
Praveen Rao
parent
e2db15efde
commit
64f07deb88
@ -171,337 +171,6 @@ typedef std::once_flag OnceType;
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#define LEVELDB_ONCE_INIT std::once_flag::once_flag();
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extern void InitOnce(OnceType* once, void (*initializer)());
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inline bool Snappy_Compress(const CompressionOptions& opts, const char* input,
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size_t length, ::std::string* output) {
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#ifdef SNAPPY
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output->resize(snappy::MaxCompressedLength(length));
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size_t outlen;
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snappy::RawCompress(input, length, &(*output)[0], &outlen);
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output->resize(outlen);
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return true;
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#endif
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return false;
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}
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inline bool Snappy_GetUncompressedLength(const char* input, size_t length,
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size_t* result) {
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#ifdef SNAPPY
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return snappy::GetUncompressedLength(input, length, result);
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#else
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return false;
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#endif
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}
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inline bool Snappy_Uncompress(const char* input, size_t length, char* output) {
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#ifdef SNAPPY
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return snappy::RawUncompress(input, length, output);
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#else
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return false;
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#endif
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}
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inline bool Zlib_Compress(const CompressionOptions& opts, const char* input,
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size_t length, ::std::string* output) {
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#ifdef ZLIB
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// The memLevel parameter specifies how much memory should be allocated for
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// the internal compression state.
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// memLevel=1 uses minimum memory but is slow and reduces compression ratio.
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// memLevel=9 uses maximum memory for optimal speed.
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// The default value is 8. See zconf.h for more details.
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static const int memLevel = 8;
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z_stream _stream;
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memset(&_stream, 0, sizeof(z_stream));
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int st = deflateInit2(&_stream, opts.level, Z_DEFLATED, opts.window_bits,
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memLevel, opts.strategy);
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if (st != Z_OK) {
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return false;
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}
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// Resize output to be the plain data length.
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// This may not be big enough if the compression actually expands data.
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output->resize(length);
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// Compress the input, and put compressed data in output.
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_stream.next_in = (Bytef*)input;
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_stream.avail_in = length;
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// Initialize the output size.
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_stream.avail_out = length;
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_stream.next_out = (Bytef*)&(*output)[0];
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int old_sz = 0, new_sz = 0, new_sz_delta = 0;
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bool done = false;
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while (!done) {
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int st = deflate(&_stream, Z_FINISH);
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switch (st) {
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case Z_STREAM_END:
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done = true;
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break;
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case Z_OK:
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// No output space. Increase the output space by 20%.
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// (Should we fail the compression since it expands the size?)
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old_sz = output->size();
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new_sz_delta = (int)(output->size() * 0.2);
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new_sz = output->size() + (new_sz_delta < 10 ? 10 : new_sz_delta);
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output->resize(new_sz);
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// Set more output.
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_stream.next_out = (Bytef*)&(*output)[old_sz];
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_stream.avail_out = new_sz - old_sz;
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break;
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case Z_BUF_ERROR:
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default:
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deflateEnd(&_stream);
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return false;
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}
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}
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output->resize(output->size() - _stream.avail_out);
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deflateEnd(&_stream);
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return true;
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#endif
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return false;
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}
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inline char* Zlib_Uncompress(const char* input_data, size_t input_length,
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int* decompress_size, int windowBits = -14) {
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#ifdef ZLIB
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z_stream _stream;
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memset(&_stream, 0, sizeof(z_stream));
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// For raw inflate, the windowBits should be -8..-15.
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// If windowBits is bigger than zero, it will use either zlib
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// header or gzip header. Adding 32 to it will do automatic detection.
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int st =
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inflateInit2(&_stream, windowBits > 0 ? windowBits + 32 : windowBits);
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if (st != Z_OK) {
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return nullptr;
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}
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_stream.next_in = (Bytef*)input_data;
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_stream.avail_in = input_length;
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// Assume the decompressed data size will 5x of compressed size.
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int output_len = input_length * 5;
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char* output = new char[output_len];
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int old_sz = output_len;
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_stream.next_out = (Bytef*)output;
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_stream.avail_out = output_len;
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char* tmp = nullptr;
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int output_len_delta;
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bool done = false;
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// while(_stream.next_in != nullptr && _stream.avail_in != 0) {
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while (!done) {
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int st = inflate(&_stream, Z_SYNC_FLUSH);
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switch (st) {
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case Z_STREAM_END:
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done = true;
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break;
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case Z_OK:
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// No output space. Increase the output space by 20%.
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old_sz = output_len;
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output_len_delta = (int)(output_len * 0.2);
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output_len += output_len_delta < 10 ? 10 : output_len_delta;
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tmp = new char[output_len];
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memcpy(tmp, output, old_sz);
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delete[] output;
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output = tmp;
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// Set more output.
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_stream.next_out = (Bytef*)(output + old_sz);
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_stream.avail_out = output_len - old_sz;
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break;
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case Z_BUF_ERROR:
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default:
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delete[] output;
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inflateEnd(&_stream);
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return nullptr;
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}
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}
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*decompress_size = output_len - _stream.avail_out;
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inflateEnd(&_stream);
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return output;
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#endif
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return nullptr;
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}
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inline bool BZip2_Compress(const CompressionOptions& opts, const char* input,
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size_t length, ::std::string* output) {
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#ifdef BZIP2
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bz_stream _stream;
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memset(&_stream, 0, sizeof(bz_stream));
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// Block size 1 is 100K.
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// 0 is for silent.
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// 30 is the default workFactor
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int st = BZ2_bzCompressInit(&_stream, 1, 0, 30);
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if (st != BZ_OK) {
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return false;
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}
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// Resize output to be the plain data length.
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// This may not be big enough if the compression actually expands data.
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output->resize(length);
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// Compress the input, and put compressed data in output.
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_stream.next_in = (char*)input;
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_stream.avail_in = length;
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// Initialize the output size.
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_stream.next_out = (char*)&(*output)[0];
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_stream.avail_out = length;
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int old_sz = 0, new_sz = 0;
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while (_stream.next_in != nullptr && _stream.avail_in != 0) {
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int st = BZ2_bzCompress(&_stream, BZ_FINISH);
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switch (st) {
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case BZ_STREAM_END:
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break;
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case BZ_FINISH_OK:
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// No output space. Increase the output space by 20%.
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// (Should we fail the compression since it expands the size?)
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old_sz = output->size();
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new_sz = (int)(output->size() * 1.2);
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output->resize(new_sz);
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// Set more output.
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_stream.next_out = (char*)&(*output)[old_sz];
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_stream.avail_out = new_sz - old_sz;
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break;
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case BZ_SEQUENCE_ERROR:
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default:
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BZ2_bzCompressEnd(&_stream);
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return false;
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}
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}
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output->resize(output->size() - _stream.avail_out);
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BZ2_bzCompressEnd(&_stream);
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return true;
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#endif
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return false;
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}
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inline char* BZip2_Uncompress(const char* input_data, size_t input_length,
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int* decompress_size) {
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#ifdef BZIP2
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bz_stream _stream;
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memset(&_stream, 0, sizeof(bz_stream));
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int st = BZ2_bzDecompressInit(&_stream, 0, 0);
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if (st != BZ_OK) {
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return nullptr;
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}
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_stream.next_in = (char*)input_data;
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_stream.avail_in = input_length;
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// Assume the decompressed data size will be 5x of compressed size.
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int output_len = input_length * 5;
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char* output = new char[output_len];
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int old_sz = output_len;
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_stream.next_out = (char*)output;
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_stream.avail_out = output_len;
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char* tmp = nullptr;
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while (_stream.next_in != nullptr && _stream.avail_in != 0) {
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int st = BZ2_bzDecompress(&_stream);
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switch (st) {
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case BZ_STREAM_END:
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break;
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case BZ_OK:
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// No output space. Increase the output space by 20%.
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old_sz = output_len;
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output_len = (int)(output_len * 1.2);
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tmp = new char[output_len];
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memcpy(tmp, output, old_sz);
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delete[] output;
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output = tmp;
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// Set more output.
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_stream.next_out = (char*)(output + old_sz);
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_stream.avail_out = output_len - old_sz;
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break;
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default:
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delete[] output;
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BZ2_bzDecompressEnd(&_stream);
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return nullptr;
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}
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}
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*decompress_size = output_len - _stream.avail_out;
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BZ2_bzDecompressEnd(&_stream);
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return output;
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#endif
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return nullptr;
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}
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inline bool LZ4_Compress(const CompressionOptions& opts, const char* input,
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size_t length, ::std::string* output) {
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#ifdef LZ4
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int compressBound = LZ4_compressBound(length);
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output->resize(8 + compressBound);
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char* p = const_cast<char*>(output->c_str());
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memcpy(p, &length, sizeof(length));
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size_t outlen;
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outlen = LZ4_compress_limitedOutput(input, p + 8, length, compressBound);
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if (outlen == 0) {
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return false;
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}
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output->resize(8 + outlen);
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return true;
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#endif
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return false;
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}
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inline char* LZ4_Uncompress(const char* input_data, size_t input_length,
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int* decompress_size) {
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#ifdef LZ4
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if (input_length < 8) {
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return nullptr;
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}
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int output_len;
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memcpy(&output_len, input_data, sizeof(output_len));
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char* output = new char[output_len];
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*decompress_size = LZ4_decompress_safe_partial(
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input_data + 8, output, input_length - 8, output_len, output_len);
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if (*decompress_size < 0) {
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delete[] output;
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return nullptr;
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}
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return output;
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#endif
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return nullptr;
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}
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inline bool LZ4HC_Compress(const CompressionOptions& opts, const char* input,
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size_t length, ::std::string* output) {
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#ifdef LZ4
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int compressBound = LZ4_compressBound(length);
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output->resize(8 + compressBound);
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char* p = const_cast<char*>(output->c_str());
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memcpy(p, &length, sizeof(length));
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size_t outlen;
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#ifdef LZ4_VERSION_MAJOR // they only started defining this since r113
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outlen = LZ4_compressHC2_limitedOutput(input, p + 8, length, compressBound,
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opts.level);
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#else
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outlen = LZ4_compressHC_limitedOutput(input, p + 8, length, compressBound);
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#endif
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if (outlen == 0) {
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return false;
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}
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output->resize(8 + outlen);
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return true;
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#endif
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return false;
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}
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#define CACHE_LINE_SIZE 64U
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#ifdef min
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