patch from VorteX that makes GAME_DELUXEQUAKE mode reset a cvar in the

[xonotic/darkplaces.git] / mathlib.c

diff --git a/mathlib.c b/mathlib.c
index 36e858dee589dca6c48541c8730375e5a6340db1..c1e65b5a06c3d37537d03ec37f007ce693bf114c 100644 (file)
--- a/mathlib.c
+++ b/mathlib.c
@@ -19,9 +19,10 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 // mathlib.c -- math primitives
 
-#include <math.h>
 #include "quakedef.h"
 
+#include <math.h>
+
 vec3_t vec3_origin = {0,0,0};
 float ixtable[4096];
 
@@ -254,6 +255,24 @@ 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;
+}
+
+
 /*-----------------------------------------------------------------*/