text: // Copyright 2011 Martin Gieseking <martin.gieseking@uos.de>.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #if defined(_MSC_VER)
  // VS seemed to change their headers between 2015 and 2017, so this now seems to be needed
  #include "intrin.h"
  #endif
  
  #include "snappy.h"
  #include "snappy-c.h"
  
  extern "C" {
  
  snappy_status snappy_compress(const char* input,
                                size_t input_length,
                                char* compressed,
                                size_t *compressed_length) {
    if (*compressed_length < snappy_max_compressed_length(input_length)) {
      return SNAPPY_BUFFER_TOO_SMALL;
    }
    snappy::RawCompress(input, input_length, compressed, compressed_length);
    return SNAPPY_OK;
  }
  
  snappy_status snappy_uncompress(const char* compressed,
                                  size_t compressed_length,
                                  char* uncompressed,
                                  size_t* uncompressed_length) {
    size_t real_uncompressed_length;
    if (!snappy::GetUncompressedLength(compressed,
                                       compressed_length,
                                       &real_uncompressed_length)) {
      return SNAPPY_INVALID_INPUT;
    }
    if (*uncompressed_length < real_uncompressed_length) {
      return SNAPPY_BUFFER_TOO_SMALL;
    }
    if (!snappy::RawUncompress(compressed, compressed_length, uncompressed)) {
      return SNAPPY_INVALID_INPUT;
    }
    *uncompressed_length = real_uncompressed_length;
    return SNAPPY_OK;
  }
  
  size_t snappy_max_compressed_length(size_t source_length) {
    return snappy::MaxCompressedLength(source_length);
  }
  
  snappy_status snappy_uncompressed_length(const char *compressed,
                                           size_t compressed_length,
                                           size_t *result) {
    if (snappy::GetUncompressedLength(compressed,
                                      compressed_length,
                                      result)) {
      return SNAPPY_OK;
    } else {
      return SNAPPY_INVALID_INPUT;
    }
  }
  
  snappy_status snappy_validate_compressed_buffer(const char *compressed,
                                                  size_t compressed_length) {
    if (snappy::IsValidCompressedBuffer(compressed, compressed_length)) {
      return SNAPPY_OK;
    } else {
      return SNAPPY_INVALID_INPUT;
    }
  }
  
  }  // extern "C"
  