include/linux/isdn_lzscomp.h

   1 /*
   2  * $Id: isdn_lzscomp.h,v 1.1 1998/07/08 16:52:33 hipp Exp $
   3  *
   4  * Header for isdn_lzscomp.c
   5  * Concentrated here to not mess up half a dozen kernel headers with code
   6  * snippets
   7  *
   8  */
   9
  10 #define CI_LZS_COMPRESS         17
  11 #define CILEN_LZS_COMPRESS      5
  12
  13 #define LZS_CMODE_NONE          0
  14 #define LZS_CMODE_LCB           1
  15 #define LZS_CMODE_CRC           2
  16 #define LZS_CMODE_SEQNO         3       /* MUST be implemented (default) */
  17 #define LZS_CMODE_EXT           4       /* Seems to be what Win0.95 uses */
  18
  19 #define LZS_COMP_MAX_HISTS      1       /* Don't waste peers ressources */
  20 #define LZS_COMP_DEF_HISTS      1       /* Most likely to negotiate */
  21 #define LZS_DECOMP_MAX_HISTS    32      /* More is really nonsense */
  22 #define LZS_DECOMP_DEF_HISTS    8       /* If we get it, this may be optimal */
  23
  24 #define LZS_HIST_BYTE1(word)    (word>>8)       /* Just for better reading */
  25 #define LZS_HIST_BYTE2(word)    (word&0xff)     /* of this big endian stuff */
  26 #define LZS_HIST_WORD(b1,b2)    ((b1<<8)|b2)    /* (network byte order rulez) */