// SPDX-License-Identifier: 0BSD /////////////////////////////////////////////////////////////////////////////// // /// \file sync_flush.c /// \brief Encode files using LZMA_SYNC_FLUSH // // Author: Lasse Collin // /////////////////////////////////////////////////////////////////////////////// #include "sysdefs.h" #include "lzma.h" #include #define CHUNK 64 static lzma_stream strm = LZMA_STREAM_INIT; static FILE *file_in; static void encode(size_t size, lzma_action action) { uint8_t in[CHUNK]; uint8_t out[CHUNK]; lzma_ret ret; do { if (strm.avail_in == 0 && size > 0) { const size_t amount = my_min(size, CHUNK); strm.avail_in = fread(in, 1, amount, file_in); strm.next_in = in; size -= amount; // Intentionally not using avail_in. } strm.next_out = out; strm.avail_out = CHUNK; ret = lzma_code(&strm, size == 0 ? action : LZMA_RUN); if (ret != LZMA_OK && ret != LZMA_STREAM_END) { fprintf(stderr, "%s:%u: %s: ret == %d\n", __FILE__, __LINE__, __func__, ret); exit(1); } fwrite(out, 1, CHUNK - strm.avail_out, stdout); } while (size > 0 || strm.avail_out == 0); if ((action == LZMA_RUN && ret != LZMA_OK) || (action != LZMA_RUN && ret != LZMA_STREAM_END)) { fprintf(stderr, "%s:%u: %s: ret == %d\n", __FILE__, __LINE__, __func__, ret); exit(1); } } int main(int argc, char **argv) { file_in = argc > 1 ? fopen(argv[1], "rb") : stdin; // Config lzma_options_lzma opt_lzma = { .dict_size = 1U << 16, .lc = LZMA_LC_DEFAULT, .lp = LZMA_LP_DEFAULT, .pb = LZMA_PB_DEFAULT, .preset_dict = NULL, .mode = LZMA_MODE_NORMAL, .nice_len = 32, .mf = LZMA_MF_HC3, .depth = 0, }; lzma_options_delta opt_delta = { .dist = 16 }; lzma_filter filters[LZMA_FILTERS_MAX + 1]; filters[0].id = LZMA_FILTER_LZMA2; filters[0].options = &opt_lzma; filters[1].id = LZMA_VLI_UNKNOWN; // Init if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32) != LZMA_OK) { fprintf(stderr, "init failed\n"); exit(1); } // Encoding encode(0, LZMA_SYNC_FLUSH); encode(6, LZMA_SYNC_FLUSH); encode(0, LZMA_SYNC_FLUSH); encode(7, LZMA_SYNC_FLUSH); encode(0, LZMA_SYNC_FLUSH); encode(0, LZMA_FINISH); /* encode(53, LZMA_SYNC_FLUSH); opt_lzma.lc = 2; opt_lzma.lp = 1; opt_lzma.pb = 0; if (lzma_filters_update(&strm, filters) != LZMA_OK) { fprintf(stderr, "update failed\n"); exit(1); } encode(404, LZMA_FINISH); */ // Clean up lzma_end(&strm); return 0; // Prevent useless warnings so we don't need to have special CFLAGS // to disable -Werror. (void)opt_lzma; (void)opt_delta; }