]> icculus.org git repositories - icculus/xz.git/blob - debug/sync_flush.c
Added the debug directory and the first debug tool
[icculus/xz.git] / debug / sync_flush.c
1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 /// \file       sync_flush.c
4 /// \brief      Encode files using LZMA_SYNC_FLUSH
5 //
6 //  Copyright (C) 2008 Lasse Collin
7 //
8 //  This library is free software; you can redistribute it and/or
9 //  modify it under the terms of the GNU Lesser General Public
10 //  License as published by the Free Software Foundation; either
11 //  version 2.1 of the License, or (at your option) any later version.
12 //
13 //  This library is distributed in the hope that it will be useful,
14 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
15 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 //  Lesser General Public License for more details.
17 //
18 ///////////////////////////////////////////////////////////////////////////////
19
20 #include "sysdefs.h"
21 #include <stdio.h>
22
23
24 static lzma_stream strm = LZMA_STREAM_INIT;
25 static FILE *file_in;
26
27
28 static void
29 encode(size_t size, lzma_action action)
30 {
31         static const size_t CHUNK = 64;
32         uint8_t in[CHUNK];
33         uint8_t out[CHUNK];
34         lzma_ret ret;
35
36         do {
37                 if (strm.avail_in == 0 && size > 0) {
38                         const size_t amount = MIN(size, CHUNK);
39                         strm.avail_in = fread(in, 1, amount, file_in);
40                         strm.next_in = in;
41                         size -= amount; // Intentionally not using avail_in.
42                 }
43
44                 strm.next_out = out;
45                 strm.avail_out = CHUNK;
46
47                 ret = lzma_code(&strm, size == 0 ? action : LZMA_RUN);
48
49                 if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
50                         fprintf(stderr, "%s:%u: %s: ret == %d\n",
51                                         __FILE__, __LINE__, __func__, ret);
52                         exit(1);
53                 }
54
55                 fwrite(out, 1, CHUNK - strm.avail_out, stdout);
56
57         } while (size > 0 || strm.avail_out == 0);
58
59         if ((action == LZMA_RUN && ret != LZMA_OK)
60                         || (action != LZMA_RUN && ret != LZMA_STREAM_END)) {
61                 fprintf(stderr, "%s:%u: %s: ret == %d\n",
62                                 __FILE__, __LINE__, __func__, ret);
63                 exit(1);
64         }
65 }
66
67
68 int
69 main(int argc, char **argv)
70 {
71         lzma_init_encoder();
72
73         file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
74
75         // Config
76         lzma_options_lzma opt_lzma = {
77                 .dictionary_size = 1 << 16,
78                 .literal_context_bits = LZMA_LITERAL_CONTEXT_BITS_DEFAULT,
79                 .literal_pos_bits = LZMA_LITERAL_POS_BITS_DEFAULT,
80                 .pos_bits = LZMA_POS_BITS_DEFAULT,
81                 .preset_dictionary = NULL,
82                 .mode = LZMA_MODE_BEST,
83                 .fast_bytes = 32,
84                 .match_finder = LZMA_MF_BT3,
85                 .match_finder_cycles = 0,
86         };
87
88         lzma_options_stream opt_stream = {
89                 .check = LZMA_CHECK_NONE,
90                 .has_crc32 = false,
91                 .uncompressed_size = LZMA_VLI_VALUE_UNKNOWN,
92                 .alignment = 0,
93         };
94         opt_stream.filters[0].id = LZMA_FILTER_LZMA;
95         opt_stream.filters[0].options = &opt_lzma;
96         opt_stream.filters[1].id = LZMA_VLI_VALUE_UNKNOWN;
97
98         // Init
99         if (lzma_stream_encoder_single(&strm, &opt_stream) != LZMA_OK) {
100                 fprintf(stderr, "init failed\n");
101                 exit(1);
102         }
103
104         // Encoding
105         encode(0, LZMA_SYNC_FLUSH);
106         encode(6, LZMA_SYNC_FLUSH);
107         encode(0, LZMA_SYNC_FLUSH);
108         encode(6, LZMA_SYNC_FLUSH);
109         encode(0, LZMA_SYNC_FLUSH);
110         encode(0, LZMA_FINISH);
111
112         // Clean up
113         lzma_end(&strm);
114
115         return 0;
116 }