(20140701)

GameLib/Util.c

@@ -1,6 +1,8 @@
 // Copyright (C) 2011 Valeriano Alfonso Rodriguez (Kableado)
 
 #include <math.h>
+#include <stdlib.h>
+#include <string.h>
 
 #include "Util.h"
 
@@ -120,10 +122,9 @@ int Colision_CircleCircle(
 	vec2_scale(cen_a,cir2,invrads);
 	if(Intersec_RayUnitCircle(orig_a,vel_a,cen_a,t)){
 		// Calculate n
-		vec2_scale(temp,vel,*t);
-		vec2_plus(temp,cir1,temp);
-		vec2_minus(temp,cir2,temp);
-		vec2_scale(n,temp,1.0f/rads);
+		vec2_scaleadd(temp,cir1,vel,*t);
+		vec2_minus(n,temp,cir2);
+		vec2_scale(n,n,invrads);
 		return(1);
 	}
 	return(0);
@@ -188,7 +189,6 @@ int absmod(int v,int d){
 		return(v%d);
 	}
 }
-
 float fabsmod(float v,int d){
 	if(v<0){
 		v+=d*((((int)(v/d))*(-1))+1);
@@ -200,4 +200,29 @@ float fabsmod(float v,int d){
 }
 
 
+/////////////////////////////
+// IsBigEndian
+//
+int IsBigEndian(){
+	union{
+		unsigned int i;
+		char c[4];
+	} bint={0x01020304};
+	return bint.c[0]==1;
+}
+
+
+/////////////////////////////
+// EndsWith
+//
+int EndsWith(char *str, char *suffix){
+    if (!str || !suffix)
+        return 0;
+    int lenStr = strlen(str);
+    int lenSuffix = strlen(suffix);
+    if (lenSuffix > lenStr)
+        return 0;
+    return strncmp(str+lenStr-lenSuffix, suffix, lenSuffix)==0;
+}
+