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path: root/lib/sqfs/blk_proc/serial.c
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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
 * block_processor.c
 *
 * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
 */
#define SQFS_BUILDING_DLL
#include "internal.h"

sqfs_block_processor_t *sqfs_block_processor_create(size_t max_block_size,
						    sqfs_compressor_t *cmp,
						    unsigned int num_workers,
						    size_t max_backlog,
						    size_t devblksz,
						    sqfs_file_t *file)
{
	sqfs_block_processor_t *proc;

	proc = alloc_flex(sizeof(*proc), 1, max_block_size);

	if (proc == NULL)
		return NULL;

	if (block_processor_init(proc, max_block_size, cmp, num_workers,
				 max_backlog, devblksz, file)) {
		block_processor_cleanup(proc);
		return NULL;
	}

	return proc;
}

void sqfs_block_processor_destroy(sqfs_block_processor_t *proc)
{
	block_processor_cleanup(proc);
}

int sqfs_block_processor_enqueue(sqfs_block_processor_t *proc,
				 sqfs_block_t *block)
{
	sqfs_block_t *fragblk = NULL;

	if (proc->status != 0) {
		free(block);
		return proc->status;
	}

	if (block->flags & ~SQFS_BLK_USER_SETTABLE_FLAGS) {
		proc->status = SQFS_ERROR_UNSUPPORTED;
		free(block);
		return proc->status;
	}

	if (block->flags & SQFS_BLK_IS_FRAGMENT) {
		block->checksum = crc32(0, block->data, block->size);

		proc->status = handle_fragment(proc, block, &fragblk);
		free(block);

		if (proc->status != 0) {
			free(fragblk);
			return proc->status;
		}

		if (fragblk == NULL)
			return 0;

		block = fragblk;
	}

	proc->status = block_processor_do_block(block, proc->cmp,
						proc->scratch,
						proc->max_block_size);

	if (proc->status == 0)
		proc->status = process_completed_block(proc, block);

	free(block);
	return proc->status;
}

int sqfs_block_processor_finish(sqfs_block_processor_t *proc)
{
	if (proc->status != 0 || proc->frag_block == NULL)
		return proc->status;

	proc->status = block_processor_do_block(proc->frag_block, proc->cmp,
						proc->scratch,
						proc->max_block_size);

	if (proc->status == 0)
		proc->status = process_completed_block(proc, proc->frag_block);

	free(proc->frag_block);
	proc->frag_block = NULL;
	return proc->status;
}