From d01649bf3ac662489db363d10f6008c6918ff27a Mon Sep 17 00:00:00 2001
From: Renaud Fivet <renaud.fivet@gmail.com>
Date: Tue, 17 Mar 2015 09:04:22 +0800
Subject: [PATCH] Return error if &div or &mod by 0.

---
 eval.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/eval.c b/eval.c
index 82160fa..81de494 100644
--- a/eval.c
+++ b/eval.c
@@ -401,10 +401,12 @@ static char *gtfun( char *fname) {
 		retstr = i_to_a( atoi( arg1) * atoi( argx)) ;
 		break ;
 	case UFDIV:
-		retstr = i_to_a( atoi( arg1) / atoi( argx)) ;
+		sz = atoi( argx) ;
+		retstr = (sz == 0) ? errorm : i_to_a( atoi( arg1) / sz) ;
 		break ;
 	case UFMOD:
-		retstr = i_to_a( atoi( arg1) % atoi( argx)) ;
+		sz = atoi( argx) ;
+		retstr = (sz == 0) ? errorm : i_to_a( atoi( arg1) % sz) ;
 		break ;
 	case UFNEG:
 		retstr = i_to_a( -atoi( argx)) ;