26 The "calib/random.h" Header.

The "calib/random.h" header contains various facilities for generating random numbers. The random numbers generated herein are far from being cryptographically sound — they are used only for various algebraic algorithms (i.e., distinct-degree factorization in Zp[x]) that do not require a high degree of randomness. Only one initial seed is supported, and no randomization by wall time or similar means is provided.

The following random state object is defined:

struct calib_Random {
	calib_int32u	lo;
	calib_int32u	hi;
	double		normal_val2;	/* Cache 2nd normal deviate */
	int		normal_flag;	/* val2 is valid iff flag is TRUE */
};

calib_random_init:

	void		calib_random_init (struct calib_Random * state);

Initialize the given random state object state.

calib_random:

	double		calib_random (struct calib_Random * state);

Return a double-precision value uniformly distributed in the half-open interval [0.0, 1.0).

calib_random_normal:

	double		calib_random_normal (struct calib_Random * state);

Return a double-precision value normally distributed with mean 0.0 and variance 1.0.

calib_random_u32:

	calib_int32u	calib_random_u32 (struct calib_Random * state);

Return a uniformly distributed unsigned 32-bit value.

calib_random_u64:

	calib_int64u	calib_random_u64 (struct calib_Random * state);

Return a uniformly distributed unsigned 64-bit value.