134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
/// \file sync_flush.c
|
|
/// \brief Encode files using LZMA_SYNC_FLUSH
|
|
//
|
|
// Copyright (C) 2008 Lasse Collin
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "sysdefs.h"
|
|
#include <stdio.h>
|
|
|
|
|
|
static lzma_stream strm = LZMA_STREAM_INIT;
|
|
static FILE *file_in;
|
|
|
|
|
|
static void
|
|
encode(size_t size, lzma_action action)
|
|
{
|
|
static const size_t CHUNK = 64;
|
|
uint8_t in[CHUNK];
|
|
uint8_t out[CHUNK];
|
|
lzma_ret ret;
|
|
|
|
do {
|
|
if (strm.avail_in == 0 && size > 0) {
|
|
const size_t amount = 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)
|
|
{
|
|
lzma_init_encoder();
|
|
|
|
file_in = argc > 1 ? fopen(argv[1], "rb") : stdin;
|
|
|
|
// Config
|
|
lzma_options_lzma opt_lzma = {
|
|
.dictionary_size = 1 << 16,
|
|
.literal_context_bits = LZMA_LITERAL_CONTEXT_BITS_DEFAULT,
|
|
.literal_pos_bits = LZMA_LITERAL_POS_BITS_DEFAULT,
|
|
.pos_bits = LZMA_POS_BITS_DEFAULT,
|
|
.preset_dictionary = NULL,
|
|
.mode = LZMA_MODE_BEST,
|
|
.fast_bytes = 32,
|
|
.match_finder = LZMA_MF_BT3,
|
|
.match_finder_cycles = 0,
|
|
};
|
|
|
|
lzma_options_delta opt_delta = {
|
|
.distance = 16
|
|
};
|
|
|
|
lzma_options_subblock opt_subblock = {
|
|
.allow_subfilters = true,
|
|
.alignment = 8, // LZMA_SUBBLOCK_ALIGNMENT_DEFAULT,
|
|
.subblock_data_size = LZMA_SUBBLOCK_DATA_SIZE_DEFAULT,
|
|
.rle = 1, // LZMA_SUBBLOCK_RLE_OFF,
|
|
.subfilter_mode = LZMA_SUBFILTER_SET,
|
|
};
|
|
opt_subblock.subfilter_options.id = LZMA_FILTER_LZMA;
|
|
opt_subblock.subfilter_options.options = &opt_lzma;
|
|
opt_subblock.subfilter_options.id = LZMA_FILTER_DELTA;
|
|
opt_subblock.subfilter_options.options = &opt_delta;
|
|
|
|
lzma_options_filter filters[LZMA_BLOCK_FILTERS_MAX + 1];
|
|
filters[0].id = LZMA_FILTER_LZMA;
|
|
filters[0].options = &opt_lzma;
|
|
filters[1].id = LZMA_VLI_VALUE_UNKNOWN;
|
|
|
|
// Init
|
|
if (lzma_stream_encoder(&strm, filters, LZMA_CHECK_NONE) != 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(6, LZMA_SYNC_FLUSH);
|
|
encode(0, LZMA_SYNC_FLUSH);
|
|
encode(0, 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_subblock;
|
|
(void)opt_delta;
|
|
}
|