From 84bf4de212a669a5ba7e3aeb423614758a7e5c0a Mon Sep 17 00:00:00 2001
From: Renaud Fivet <renaud.fivet@gmail.com>
Date: Fri, 24 Jul 2015 10:21:37 +0800
Subject: [PATCH] Review function name table search in eval.c:gtfun.

---
 eval.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/eval.c b/eval.c
index 4c36f5e..00b7a2b 100644
--- a/eval.c
+++ b/eval.c
@@ -324,10 +324,10 @@ static char *gtfun( char *fname) {
 	fnum = ARRAY_SIZE( funcs) ;
 	low = 0 ;
 	high = fnum - 1 ;
-	while( low <= high) {
+	do {
 		int s, cur ;
 
-		cur = (high - low + 1) / 2 + low ;
+		cur = (high + low) / 2 ;
 		s = strcmp( fname, funcs[ cur].f_name) ;
 		if( s == 0) {
 			fnum = cur ;
@@ -336,7 +336,7 @@ static char *gtfun( char *fname) {
 			high = cur - 1 ;
 		else
 			low = cur + 1 ;
-	}
+	} while( low <= high) ;
 
 	/* return errorm on a bad reference */
 	if (fnum == ARRAY_SIZE(funcs))