1// Protocol Buffers - Google's data interchange format
2// Copyright 2009 Google Inc.  All rights reserved.
3// https://developers.google.com/protocol-buffers/
4//
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions are
7// met:
8//
9//     * Redistributions of source code must retain the above copyright
10// notice, this list of conditions and the following disclaimer.
11//     * Redistributions in binary form must reproduce the above
12// copyright notice, this list of conditions and the following disclaimer
13// in the documentation and/or other materials provided with the
14// distribution.
15//     * Neither the name of Google Inc. nor the names of its
16// contributors may be used to endorse or promote products derived from
17// this software without specific prior written permission.
18//
19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30
31// Author: brianolson@google.com (Brian Olson)
32//  Based on original Protocol Buffers design by
33//  Sanjay Ghemawat, Jeff Dean, and others.
34//
35// Test program to verify that GzipOutputStream is compatible with command line
36// gzip or java.util.zip.GzipOutputStream
37//
38// Reads data on standard input and writes compressed gzip stream to standard
39// output.
40
41#include <stdio.h>
42#include <stdlib.h>
43#include <fcntl.h>
44
45#ifdef _WIN32
46#ifndef STDIN_FILENO
47#define STDIN_FILENO 0
48#endif
49#ifndef STDOUT_FILENO
50#define STDOUT_FILENO 1
51#endif
52#endif
53
54#include <google/protobuf/io/gzip_stream.h>
55#include <google/protobuf/io/zero_copy_stream_impl.h>
56
57using google::protobuf::io::FileOutputStream;
58using google::protobuf::io::GzipOutputStream;
59
60int main(int argc, const char** argv) {
61  FileOutputStream fout(STDOUT_FILENO);
62  GzipOutputStream out(&fout);
63  int readlen;
64
65  while (true) {
66    void* outptr;
67    int outlen;
68    bool ok;
69    do {
70      ok = out.Next(&outptr, &outlen);
71      if (!ok) {
72        break;
73      }
74    } while (outlen <= 0);
75    readlen = read(STDIN_FILENO, outptr, outlen);
76    if (readlen <= 0) {
77      out.BackUp(outlen);
78      break;
79    }
80    if (readlen < outlen) {
81      out.BackUp(outlen - readlen);
82    }
83  }
84
85  return 0;
86}
87