1 files changed, 9 insertions, 0 deletions
diff --git a/util.c b/util.c
index d6890d6..d598f17 100644
--- a/util.c
+++ b/util.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
 
 #include "util.h"
 
@@ -26,6 +27,14 @@ __attribute__((noreturn)) void outofmem(void){
 }
 
 
+double floatmod(double a,double b){
+	if(b==0)return nan("");
+	int sa=a<0?-1:1;
+	a=fabs(a); b=fabs(b);
+	return sa*(a-b*floor(a/b));
+}
+
+
 void* malloccheck(size_t n){
 	void *p=mallocreal(n);
 	if(!p)outofmem();