imath.c
/* integer math */
#include "dryos.h"
#include "math.h"
int powi(int base, int power)
{
int result = 1;
while (power)
{
if (power & 1)
result *= base;
power >>= 1;
base *= base;
}
return result;
}
int log2i(int x)
{
int result = 0;
while (x >>= 1) result++;
return result;
}
int log10i(int x)
{
int result = 0;
while(x /= 10) result++;
return result;
}
/* todo: integer-only implementation? */
uint32_t log_length(int v)
{
if (!v) return 0;
return (unsigned int)(log2f(v) * 100);
}