From: Richard Stallman <rms@gnu.org>
Date: Sun, 1 Oct 1995 20:17:02 +0000 (+0000)
Subject: (re_search_2): Use 0, not -1, as the lower bound
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58d50470ab1a18a4334189fdf4ab9cd95f440c66;p=pspp

(re_search_2): Use 0, not -1, as the lower bound
for the match position when we adjust RANGE.
---

diff --git a/regex.c b/regex.c
index d0086ed1aa..8b26a73755 100644
--- a/regex.c
+++ b/regex.c
@@ -3259,9 +3259,10 @@ re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop)
     return -1;
     
   /* Fix up RANGE if it might eventually take us outside
-     the virtual concatenation of STRING1 and STRING2.  */
-  if (endpos < -1)
-    range = -1 - startpos;
+     the virtual concatenation of STRING1 and STRING2.
+     Make sure we won't move STARTPOS below 0 or above TOTAL_SIZE.  */ 
+  if (endpos < 0)
+    range = 0 - startpos;
   else if (endpos > total_size)
     range = total_size - startpos;