libf2c/libF77/d_sign.c

   1 #include "f2c.h"
   2
   3 #ifdef KR_headers
   4 double d_sign(a,b) doublereal *a, *b;
   5 #else
   6 double d_sign(doublereal *a, doublereal *b)
   7 #endif
   8 {
   9 double x;
  10 x = (*a >= 0 ? *a : - *a);
  11 return( *b >= 0 ? x : -x);
  12 }