linux/lib/lzo/lzo1x_decompress_safe.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  LZO1X Decompressor from LZO
 *
 *  Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <[email protected]>
 *
 *  The full LZO package can be found at:
 *  http://www.oberhumer.com/opensource/lzo/
 *
 *  Changed for Linux kernel use by:
 *  Nitin Gupta <[email protected]>
 *  Richard Purdie <[email protected]>
 */

#ifndef STATIC
#include <linux/module.h>
#include <linux/kernel.h>
#endif
#include <asm/unaligned.h>
#include <linux/lzo.h>
#include "lzodefs.h"

#define HAVE_IP(x) …
#define HAVE_OP(x) …
#define NEED_IP(x) …
#define NEED_OP(x) …
#define TEST_LB(m_pos) …

/* This MAX_255_COUNT is the maximum number of times we can add 255 to a base
 * count without overflowing an integer. The multiply will overflow when
 * multiplying 255 by more than MAXINT/255. The sum will overflow earlier
 * depending on the base count. Since the base count is taken from a u8
 * and a few bits, it is safe to assume that it will always be lower than
 * or equal to 2*255, thus we can always prevent any overflow by accepting
 * two less 255 steps. See Documentation/staging/lzo.rst for more information.
 */
#define MAX_255_COUNT …

int lzo1x_decompress_safe(const unsigned char *in, size_t in_len,
			  unsigned char *out, size_t *out_len)
{ … }
#ifndef STATIC
EXPORT_SYMBOL_GPL(…);

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;

#endif