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/*************************************************************************
 * ulong_scale.c - math utilities library
 *
 * returns a long for scaling a double into a long
 *
 * Mike Dixon RAP NCAR Boulder CO USA
 *
 * December 1994
 *
 ***************************************************************************/

#include <rapmath/umath.h>

#define MAX_VAL 1.0e9

long ulong_scale(double x)

{

  double factor;

  if (x == 0.0) {
    return (1L);
  }

  factor = fabs(MAX_VAL / x);

  if (factor > MAX_VAL) {
    factor = MAX_VAL;
  } else if (factor < 1.0) {
    factor = 1.0;
  }

  return ((long) (factor + 0.5));

}