From: Martin Mares <mj@ucw.cz>
Date: Tue, 24 Jul 2012 16:51:27 +0000 (+0200)
Subject: Avoid infinite loops when regex matches an empty string
X-Git-Tag: v1.0~11
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;ds=sidebyside;h=c27d97243bb3cb28a11bb777a586e6453cd1fed8;p=xsv.git

Avoid infinite loops when regex matches an empty string
---

diff --git a/xsv.c b/xsv.c
index 545a39e..0493312 100644
--- a/xsv.c
+++ b/xsv.c
@@ -416,6 +416,12 @@ static int regex_read(struct format *fmt)
 			}
 			return 1;
 		}
+		if (ovec[0] == ovec[1]) {
+			warn(fmt, "Regular expression matched an empty separator");
+			new_field(i);
+			in_field->len = n - i;
+			return 1;
+		}
 		if (!fmt->sloppy || ovec[0]) {
 			new_field(i);
 			in_field->len = ovec[0] - i;