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 ///////////////////////////////////////////////////////////////////////////////
17 static lzma_stream strm = LZMA_STREAM_INIT;
22 encode(size_t size, lzma_action action)
24 static const size_t CHUNK = 64;
30 if (strm.avail_in == 0 && size > 0) {
31 const size_t amount = MIN(size, CHUNK);
32 strm.avail_in = fread(in, 1, amount, file_in);
34 size -= amount; // Intentionally not using avail_in.
38 strm.avail_out = CHUNK;
40 ret = lzma_code(&strm, size == 0 ? action : LZMA_RUN);
42 if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
43 fprintf(stderr, "%s:%u: %s: ret == %d\n",
44 __FILE__, __LINE__, __func__, ret);
48 fwrite(out, 1, CHUNK - strm.avail_out, stdout);
50 } while (size > 0 || strm.avail_out == 0);
52 if ((action == LZMA_RUN && ret != LZMA_OK)
53 || (action != LZMA_RUN && ret != LZMA_STREAM_END)) {
54 fprintf(stderr, "%s:%u: %s: ret == %d\n",
55 __FILE__, __LINE__, __func__, ret);
62 main(int argc, char **argv)
64 file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
67 lzma_options_lzma opt_lzma = {
68 .dict_size = 1U << 16,
69 .lc = LZMA_LC_DEFAULT,
70 .lp = LZMA_LP_DEFAULT,
71 .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");
109 encode(0, LZMA_SYNC_FLUSH);
110 encode(6, LZMA_SYNC_FLUSH);
111 encode(0, LZMA_SYNC_FLUSH);
112 encode(7, LZMA_SYNC_FLUSH);
113 encode(0, LZMA_SYNC_FLUSH);
114 encode(0, LZMA_FINISH);
116 encode(53, LZMA_SYNC_FLUSH);
117 // opt_lzma.literal_context_bits = 2;
118 // opt_lzma.literal_pos_bits = 1;
119 // opt_lzma.pos_bits = 0;
120 encode(404, LZMA_FINISH);
127 // Prevent useless warnings so we don't need to have special CFLAGS
128 // to disable -Werror.