var/external/wavelet/awaprogs/chap02/common.h

   1 /*
   2  * These are common definitions and macros.
   3  *
   4  * Copyright (C) 1991--94 Wickerhauser Consulting.  All Rights Reserved.
   5  * May be freely copied for noncommercial use.  See
   6  * ``Adapted Wavelet Analysis from Theory to Software'' ISBN 1-56881-041-5
   7  * by Mladen Victor Wickerhauser [AK Peters, Ltd., Wellesley, Mass., 1994]
   8  */
   9
  10 #ifndef COMMON_HDR_ALREADY_INCLUDED
  11 # define COMMON_HDR_ALREADY_INCLUDED
  12
  13 #ifndef TRUE
  14 # define TRUE 1
  15 #endif
  16
  17 #ifndef FALSE
  18 # define FALSE 0
  19 #endif
  20
  21 #define max(x,y)                ((x)>(y)?(x):(y))
  22 #define min(x,y)                ((x)<(y)?(x):(y))
  23 #define absval(x)               ((x)<0?-(x):(x))
  24
  25 /* Useful constants: */
  26 #define         PI              (3.141592653589793)
  27 #define         SR2             (1.414213562373095) /* sqrt(2.0)  */
  28 #define         SRH             (0.707106781186547) /* sqrt(0.5)  */
  29
  30 #endif /* COMMON_HDR_ALREADY_INCLUDED */