math.h

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#pragma once
 
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
 
/* ============================================================================
 * Mathematical Macros
 * ============================================================================
 */
 
#define ROUND(xfloat) (int)(0.5f + (xfloat))
 
/* ============================================================================
 * Clamping Functions
 * ============================================================================
 */
 
static inline uint8_t clamp_rgb(int value) {
  if (value < 0)
    return 0;
  if (value > 255)
    return 255;
  return (uint8_t)value;
}
 
/* ============================================================================
 * Power-of-Two Utilities
 * ============================================================================
 */
 
static inline bool math_is_power_of_two(size_t n) {
  return n && !(n & (n - 1));
}
 
static inline size_t math_next_power_of_two(size_t n) {
  if (n == 0)
    return 1;
  n--;
  n |= n >> 1;
  n |= n >> 2;
  n |= n >> 4;
  n |= n >> 8;
  n |= n >> 16;
  if (sizeof(size_t) > 4) {
    n |= n >> 32;
  }
  return n + 1;
}