#ifdef G_OS_WIN32
#include <stdlib.h>
+#include <process.h> /* For getpid() */
#endif
/**
*
* The g_rand*_range functions will return high quality equally
* distributed random numbers, whereas for example the
- * `(g_random_int()%max)` approach often
+ * `(g_random_int()%max)` approach often
* doesn't yield equally distributed numbers.
*
* GLib changed the seeding algorithm for the pseudo-random number
*
* Creates a new random number generator initialized with @seed.
*
- * Return value: the new #GRand
+ * Returns: the new #GRand
**/
GRand*
g_rand_new_with_seed (guint32 seed)
*
* Creates a new random number generator initialized with @seed.
*
- * Return value: the new #GRand
+ * Returns: the new #GRand
*
* Since: 2.4
*/
*
* On Windows, the seed is taken from rand_s().
*
- * Return value: the new #GRand
+ * Returns: the new #GRand
*/
GRand*
g_rand_new (void)
seed[3] = getppid ();
}
#else /* G_OS_WIN32 */
+ /* rand_s() is only available since Visual Studio 2005 */
+#if defined(_MSC_VER) && _MSC_VER >= 1400
gint i;
for (i = 0; i < G_N_ELEMENTS (seed); i++)
rand_s (&seed[i]);
+#else
+#warning Using insecure seed for random number generation because of missing rand_s() in Windows XP
+ GTimeVal now;
+
+ g_get_current_time (&now);
+ seed[0] = now.tv_sec;
+ seed[1] = now.tv_usec;
+ seed[2] = getpid ();
+ seed[3] = 0;
+#endif
+
#endif
return g_rand_new_with_seed_array (seed, 4);
* This way you can take a snapshot of the random number generator for
* replaying later.
*
- * Return value: the new #GRand
+ * Returns: the new #GRand
*
* Since: 2.4
*/
* Returns the next random #guint32 from @rand_ equally distributed over
* the range [0..2^32-1].
*
- * Return value: a random number
+ * Returns: a random number
*/
guint32
g_rand_int (GRand *rand)
* Returns the next random #gint32 from @rand_ equally distributed over
* the range [@begin..@end-1].
*
- * Return value: a random number
+ * Returns: a random number
*/
gint32
g_rand_int_range (GRand *rand,
* Returns the next random #gdouble from @rand_ equally distributed over
* the range [0..1).
*
- * Return value: a random number
+ * Returns: a random number
*/
gdouble
g_rand_double (GRand *rand)
* Returns the next random #gdouble from @rand_ equally distributed over
* the range [@begin..@end).
*
- * Return value: a random number
+ * Returns: a random number
*/
gdouble
g_rand_double_range (GRand *rand,
* Return a random #guint32 equally distributed over the range
* [0..2^32-1].
*
- * Return value: a random number
+ * Returns: a random number
*/
guint32
g_random_int (void)
* Returns a random #gint32 equally distributed over the range
* [@begin..@end-1].
*
- * Return value: a random number
+ * Returns: a random number
*/
gint32
g_random_int_range (gint32 begin,
*
* Returns a random #gdouble equally distributed over the range [0..1).
*
- * Return value: a random number
+ * Returns: a random number
*/
gdouble
g_random_double (void)
* Returns a random #gdouble equally distributed over the range
* [@begin..@end).
*
- * Return value: a random number
+ * Returns: a random number
*/
gdouble
g_random_double_range (gdouble begin,