zcgunzip.cc

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// Protocol Buffers - Google's data interchange format
// Copyright 2009 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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// Author: brianolson@google.com (Brian Olson)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.
//
// Test program to verify that GzipInputStream is compatible with command line
// gunzip or java.util.zip.GzipInputStream
//
// Reads gzip stream on standard input and writes decompressed data to standard
// output.
 
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
 
#ifdef _WIN32
#ifndef STDIN_FILENO
#define STDIN_FILENO 0
#endif
#ifndef STDOUT_FILENO
#define STDOUT_FILENO 1
#endif
#endif
 
#include <google/protobuf/io/gzip_stream.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
 
using google::protobuf::io::FileInputStream;
using google::protobuf::io::GzipInputStream;
 
int main(int argc, const char** argv) {
  FileInputStream fin(STDIN_FILENO);
  GzipInputStream in(&fin);
 
  while (true) {
    const void* inptr;
    int inlen;
    bool ok;
    ok = in.Next(&inptr, &inlen);
    if (!ok) {
      break;
    }
    if (inlen > 0) {
      int err = write(STDOUT_FILENO, inptr, inlen);
      if (err != inlen) {
        fprintf(stderr, "write unexpectedly returned %d.\n", err);
        return 1;
      }
    }
  }
 
  return 0;
}