X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=mathlib.c;h=eaa1a765d8e05bc5c65328a808591ad5053941e1;hp=36e858dee589dca6c48541c8730375e5a6340db1;hb=da29a8beeb35293e2fd38b51883c91b5cf4cf4ad;hpb=c57a2ebbdf87d3d311b14eb75be65fbdf321e67c

diff --git a/mathlib.c b/mathlib.c
index 36e858de..eaa1a765 100644
--- a/mathlib.c
+++ b/mathlib.c
@@ -254,6 +254,24 @@ void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point,
 	       + (t0 * vr[2] + t1 * vu[2] + vf[2] * vf[2]) * point[2];
 }
 
+/*-----------------------------------------------------------------*/
+
+// returns the smallest integer greater than or equal to "value", or 0 if "value" is too big
+unsigned int CeilPowerOf2(unsigned int value)
+{
+	unsigned int ceilvalue;
+
+	if (value > (1U << (sizeof(int) * 8 - 1)))
+		return 0;
+
+	ceilvalue = 1;
+	while (ceilvalue < value)
+		ceilvalue <<= 1;
+
+	return ceilvalue;
+}
+
+
 /*-----------------------------------------------------------------*/