lim.h

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#ifndef __lim_h__
#define __lim_h__

#include <limits.h>
#include <float.h>

#include <exception>

/** A small set of numeric limits routines, since gcc prior to 3.x doesn't
 * have numeric_limits */

// ---------------------------------------------------------------------------

template<typename T>
static T max_limit()
{
        T tmp = 0;
        static T max = 0;
        static bool found = false;

        if (found)
                return(max);
        
        tmp = 1;
        max = 0;
        while (tmp > max) {
                max = tmp;
                tmp = (tmp * 2) + 1;
        }
        found = true;
        return(max);
}

template<typename T>
static T min_limit()
{
        T tmp = 0;
        static T min = 0;
        static bool found = false;

        if (found)
                return(min);
        
        tmp = -1;
        min = 0;
        while (tmp < min) {
                min = tmp;
                tmp = (tmp * 2) - 1;
        }
        
        tmp = - max_limit<T>() - 1;
        if (tmp < min) {
                min = tmp;
        }

        found = true;
        return(min);
}

template<>
static float max_limit<float>()
{
        return(FLT_MAX);
}

template<>
static float min_limit<float>()
{
        return(FLT_MIN);
}

template<>
static double max_limit<double>()
{
        return(DBL_MAX);
}

template<>
static double min_limit<double>()
{
        return(DBL_MIN);
}

// ---------------------------------------------------------------------------

#endif

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