src/compression/snappy-codec.cc

// Copyright 2012 Cloudera Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "codec.h"

#include <snappy.h>

using namespace parquet_cpp;

void SnappyCodec::Decompress(int input_len, const uint8_t* input,
      int output_len, uint8_t* output_buffer) {
  if (!snappy::RawUncompress(reinterpret_cast<const char*>(input),
      static_cast<size_t>(input_len), reinterpret_cast<char*>(output_buffer))) {
    throw ParquetException("Corrupt snappy compressed data.");
  }
}

int SnappyCodec::MaxCompressedLen(int input_len, const uint8_t* input) {
  return snappy::MaxCompressedLength(input_len);
}

int SnappyCodec::Compress(int input_len, const uint8_t* input,
    int output_buffer_len, uint8_t* output_buffer) {
  size_t output_len;
  snappy::RawCompress(reinterpret_cast<const char*>(input),
      static_cast<size_t>(input_len), reinterpret_cast<char*>(output_buffer),
      &output_len);
  return output_len;
}