path: root/src/cnki_zlib.c

/*
 * Copyright (c) 2020-2022, yzrh <yzrh@noema.org>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <stdint.h>
#include <string.h>

#include "zlib.h"

int
cnki_zlib(char **dst, int *dst_size,
	const char * restrict src, int src_size)
{
	uint8_t padding = 0;
	int32_t size;

	if (strncmp(src + 8, "COMPRESSTEXT", 12) == 0)
		padding = 8;

	memcpy(&size, src + 12 + padding, 4);

	*dst_size = size;

	if (strinflate(dst, size, src + 16 + padding, src_size - 16 - padding) != 0)
		return 1;

	return 0;
}