1// Protocol Buffers - Google's data interchange format
2// Copyright 2009 Google Inc.  All rights reserved.
3// http://code.google.com/p/protobuf/
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,
24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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
28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 "config.h"
42
43#include <stdio.h>
44#include <stdlib.h>
45#include <fcntl.h>
46
47#include <google/protobuf/io/gzip_stream.h>
48#include <google/protobuf/io/zero_copy_stream_impl.h>
49
50using google::protobuf::io::FileOutputStream;
51using google::protobuf::io::GzipOutputStream;
52
53int main(int argc, const char** argv) {
54  FileOutputStream fout(STDOUT_FILENO);
55  GzipOutputStream out(&fout);
56  int readlen;
57
58  while (true) {
59    void* outptr;
60    int outlen;
61    bool ok;
62    do {
63      ok = out.Next(&outptr, &outlen);
64      if (!ok) {
65        break;
66      }
67    } while (outlen <= 0);
68    readlen = read(STDIN_FILENO, outptr, outlen);
69    if (readlen <= 0) {
70      out.BackUp(outlen);
71      break;
72    }
73    if (readlen < outlen) {
74      out.BackUp(outlen - readlen);
75    }
76  }
77
78  return 0;
79}
80