snappy compression round-trip test harness

snappy-harness.cpp

#include <snappy.h>
#include <iostream>
#include <string>
#include <cstring>
#include <stdlib.h>

const size_t maxInputSize = 10 * 1024 * 1024;

char inputBuf[maxInputSize];

int main( int argc, char *argv[] ) {
  std::cin.read( inputBuf, maxInputSize );
  size_t inputLength = std::cin.gcount();

  std::string compressed;
  snappy::Compress( inputBuf, inputLength, &compressed );

  std::string uncompressed;
  snappy::Uncompress( compressed.data(), compressed.size(),
                      &uncompressed );

  if ( uncompressed.size() != inputLength ) {
    std::cout << "Size mismatch.";
    abort();
  }
  
  if ( memcmp( uncompressed.data(), inputBuf, inputLength ) != 0 ) {
    std::cout << "Content mismatch.";
    abort();
  }

  return 0;
}