1 ///////////////////////////////////////////////////////////////////////////////
4 /// \brief Encode files using LZMA_SYNC_FLUSH
6 // Author: Lasse Collin
8 // This file has been put into the public domain.
9 // You can do whatever you want with this file.
11 ///////////////////////////////////////////////////////////////////////////////
18 static lzma_stream strm = LZMA_STREAM_INIT;
23 encode(size_t size, lzma_action action)
25 static const size_t CHUNK = 64;
31 if (strm.avail_in == 0 && size > 0) {
32 const size_t amount = MIN(size, CHUNK);
33 strm.avail_in = fread(in, 1, amount, file_in);
35 size -= amount; // Intentionally not using avail_in.
39 strm.avail_out = CHUNK;
41 ret = lzma_code(&strm, size == 0 ? action : LZMA_RUN);
43 if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
44 fprintf(stderr, "%s:%u: %s: ret == %d\n",
45 __FILE__, __LINE__, __func__, ret);
49 fwrite(out, 1, CHUNK - strm.avail_out, stdout);
51 } while (size > 0 || strm.avail_out == 0);
53 if ((action == LZMA_RUN && ret != LZMA_OK)
54 || (action != LZMA_RUN && ret != LZMA_STREAM_END)) {
55 fprintf(stderr, "%s:%u: %s: ret == %d\n",
56 __FILE__, __LINE__, __func__, ret);
63 main(int argc, char **argv)
65 file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
68 lzma_options_lzma opt_lzma = {
69 .dict_size = 1U << 16,
70 .lc = LZMA_LC_DEFAULT,
71 .lp = LZMA_LP_DEFAULT,
72 .pb = LZMA_PB_DEFAULT,
74 .mode = LZMA_MODE_NORMAL,
80 lzma_options_delta opt_delta = {
84 lzma_options_subblock opt_subblock = {
85 .allow_subfilters = true,
86 .alignment = 8, // LZMA_SUBBLOCK_ALIGNMENT_DEFAULT,
87 .subblock_data_size = LZMA_SUBBLOCK_DATA_SIZE_DEFAULT,
88 .rle = 1, // LZMA_SUBBLOCK_RLE_OFF,
89 .subfilter_mode = LZMA_SUBFILTER_SET,
91 opt_subblock.subfilter_options.id = LZMA_FILTER_LZMA1;
92 opt_subblock.subfilter_options.options = &opt_lzma;
93 opt_subblock.subfilter_options.id = LZMA_FILTER_DELTA;
94 opt_subblock.subfilter_options.options = &opt_delta;
96 lzma_filter filters[LZMA_FILTERS_MAX + 1];
97 filters[0].id = LZMA_FILTER_LZMA2;
98 filters[0].options = &opt_lzma;
99 filters[1].id = LZMA_VLI_UNKNOWN;
102 if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32) != LZMA_OK) {
103 fprintf(stderr, "init failed\n");
108 encode(0, LZMA_SYNC_FLUSH);
109 encode(6, LZMA_SYNC_FLUSH);
110 encode(0, LZMA_SYNC_FLUSH);
111 encode(7, LZMA_SYNC_FLUSH);
112 encode(0, LZMA_SYNC_FLUSH);
113 encode(0, LZMA_FINISH);
116 encode(53, LZMA_SYNC_FLUSH);
120 if (lzma_filters_update(&strm, filters) != LZMA_OK) {
121 fprintf(stderr, "update failed\n");
124 encode(404, LZMA_FINISH);
132 // Prevent useless warnings so we don't need to have special CFLAGS
133 // to disable -Werror.