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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* process_block.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "config.h"
#include "sqfs/block_processor.h"
#include "sqfs/compress.h"
#include "util.h"
#include <string.h>
#include <zlib.h>
int sqfs_block_process(sqfs_block_t *block, sqfs_compressor_t *cmp,
uint8_t *scratch, size_t scratch_size)
{
ssize_t ret;
if (!(block->flags & SQFS_BLK_DONT_CHECKSUM))
block->checksum = crc32(0, block->data, block->size);
if (!(block->flags & SQFS_BLK_DONT_COMPRESS)) {
ret = cmp->do_block(cmp, block->data, block->size,
scratch, scratch_size);
if (ret < 0)
return -1;
if (ret > 0) {
memcpy(block->data, scratch, ret);
block->size = ret;
block->flags |= SQFS_BLK_IS_COMPRESSED;
}
}
return 0;
}
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