LXR linux/include/linux/lzo.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __LZO_H__
   3#define __LZO_H__
   4/*
   5 *  LZO Public Kernel Interface
   6 *  A mini subset of the LZO real-time data compression library
   7 *
   8 *  Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
   9 *
  10 *  The full LZO package can be found at:
  11 *  http://www.oberhumer.com/opensource/lzo/
  12 *
  13 *  Changed for Linux kernel use by:
  14 *  Nitin Gupta <nitingupta910@gmail.com>
  15 *  Richard Purdie <rpurdie@openedhand.com>
  16 */
  17
  18#define LZO1X_1_MEM_COMPRESS    (8192 * sizeof(unsigned short))
  19#define LZO1X_MEM_COMPRESS      LZO1X_1_MEM_COMPRESS
  20
  21#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3 + 2)
  22
  23/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
  24int lzo1x_1_compress(const unsigned char *src, size_t src_len,
  25                     unsigned char *dst, size_t *dst_len, void *wrkmem);
  26
  27/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
  28int lzorle1x_1_compress(const unsigned char *src, size_t src_len,
  29                     unsigned char *dst, size_t *dst_len, void *wrkmem);
  30
  31/* safe decompression with overrun testing */
  32int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
  33                          unsigned char *dst, size_t *dst_len);
  34
  35/*
  36 * Return values (< 0 = Error)
  37 */
  38#define LZO_E_OK                        0
  39#define LZO_E_ERROR                     (-1)
  40#define LZO_E_OUT_OF_MEMORY             (-2)
  41#define LZO_E_NOT_COMPRESSIBLE          (-3)
  42#define LZO_E_INPUT_OVERRUN             (-4)
  43#define LZO_E_OUTPUT_OVERRUN            (-5)
  44#define LZO_E_LOOKBEHIND_OVERRUN        (-6)
  45#define LZO_E_EOF_NOT_FOUND             (-7)
  46#define LZO_E_INPUT_NOT_CONSUMED        (-8)
  47#define LZO_E_NOT_YET_IMPLEMENTED       (-9)
  48#define LZO_E_INVALID_ARGUMENT          (-10)
  49
  50#endif
  51