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bootloader/u-boot_2015_04/include/linux/lzo.h 1.42 KB
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  #ifndef __LZO_H__
  #define __LZO_H__
  /*
   *  LZO Public Kernel Interface
   *  A mini subset of the LZO real-time data compression library
   *
   *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
   *
   *  The full LZO package can be found at:
   *  http://www.oberhumer.com/opensource/lzo/
   *
   *  Changed for kernel use by:
   *  Nitin Gupta <nitingupta910@gmail.com>
   *  Richard Purdie <rpurdie@openedhand.com>
   */
  
  #define LZO1X_MEM_COMPRESS	(16384 * sizeof(unsigned char *))
  #define LZO1X_1_MEM_COMPRESS	LZO1X_MEM_COMPRESS
  
  #define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
  
  /* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
  int lzo1x_1_compress(const unsigned char *src, size_t src_len,
  			unsigned char *dst, size_t *dst_len, void *wrkmem);
  
  /* safe decompression with overrun testing */
  int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
  			unsigned char *dst, size_t *dst_len);
  
  /* decompress lzop format */
  int lzop_decompress(const unsigned char *src, size_t src_len,
  		    unsigned char *dst, size_t *dst_len);
  
  /*
   * Return values (< 0 = Error)
   */
  #define LZO_E_OK			0
  #define LZO_E_ERROR			(-1)
  #define LZO_E_OUT_OF_MEMORY		(-2)
  #define LZO_E_NOT_COMPRESSIBLE		(-3)
  #define LZO_E_INPUT_OVERRUN		(-4)
  #define LZO_E_OUTPUT_OVERRUN		(-5)
  #define LZO_E_LOOKBEHIND_OVERRUN	(-6)
  #define LZO_E_EOF_NOT_FOUND		(-7)
  #define LZO_E_INPUT_NOT_CONSUMED	(-8)
  #define LZO_E_NOT_YET_IMPLEMENTED	(-9)
  
  #endif