1 ///////////////////////////////////////////////////////////////////////////////
4 /// \brief Encode files using LZMA_FULL_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;
69 lzma_options_lzma opt_lzma;
70 if (lzma_lzma_preset(&opt_lzma, 1)) {
71 fprintf(stderr, "preset failed\n");
74 lzma_filter filters[LZMA_FILTERS_MAX + 1];
75 filters[0].id = LZMA_FILTER_LZMA2;
76 filters[0].options = &opt_lzma;
77 filters[1].id = LZMA_VLI_UNKNOWN;
80 if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32) != LZMA_OK) {
81 fprintf(stderr, "init failed\n");
85 // if (lzma_easy_encoder(&strm, 1)) {
86 // fprintf(stderr, "init failed\n");
91 encode(0, LZMA_FULL_FLUSH);
92 encode(6, LZMA_FULL_FLUSH);
93 encode(0, LZMA_FULL_FLUSH);
94 encode(7, LZMA_FULL_FLUSH);
95 encode(0, LZMA_FULL_FLUSH);
96 encode(0, LZMA_FINISH);