Is it possible to make randomUniform more efficient?

[sofian]

The problem: randomUniform() performs two casts and one division.
Then randomUniform(float) version adds a multiplication to that.
Then randomUniform(float, float) adds yet another multiplication.

Maybe we should rewrite:

float randomUniform() {
  return randomUniform(0, 1);
}

float randomUniform(float h) {
  return randomUniform(0, h);
}

float randomUniform(float a, float b) {
  return ((float)random() / (float)
#ifdef RANDOM_MAX
      RANDOM_MAX
#else
      RAND_MAX
#endif
      * (b - a) + a);
}

Would require more calculations but less size.