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GRand: avoid overflow
author
Matthias Clasen
<mclasen@redhat.com>
Sat, 4 Jun 2011 03:37:23 +0000
(23:37 -0400)
committer
Matthias Clasen
<mclasen@redhat.com>
Sat, 4 Jun 2011 03:37:23 +0000
(23:37 -0400)
Otherwise, g_random_double_range (-G_MAXDOUBLE, G_MAXDOUBLE)
doesn't work as expected.
https://bugzilla.gnome.org/show_bug.cgi?id=502560
glib/grand.c
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diff --git
a/glib/grand.c
b/glib/grand.c
index
b97617b
..
bb1bffe
100644
(file)
--- a/
glib/grand.c
+++ b/
glib/grand.c
@@
-586,7
+586,11
@@
g_rand_double (GRand* rand)
gdouble
g_rand_double_range (GRand* rand, gdouble begin, gdouble end)
{
- return g_rand_double (rand) * (end - begin) + begin;
+ gdouble r;
+
+ r = g_rand_double (rand);
+
+ return r * end - (r - 1) * begin;
}
/**