From: Richard Stallman <rms@gnu.org>
Date: Wed, 16 Nov 1994 20:28:48 +0000 (+0000)
Subject: (RE_NO_POSIX_BACKTRACKING): New macro.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3bcf16a33a87c91bb01324c882f726011e5228f;p=pspp

(RE_NO_POSIX_BACKTRACKING): New macro.
---

diff --git a/regex.h b/regex.h
index 55927f627c..66791b0670 100644
--- a/regex.h
+++ b/regex.h
@@ -130,6 +130,10 @@ typedef unsigned reg_syntax_t;
    If not set, then an unmatched ) is invalid.  */
 #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1)
 
+/* If this bit is set, succeed as soon as we match the whole pattern,
+   without further backtracking.  */
+#define RE_NO_POSIX_BACKTRACKING (RE_UNMATCHED_RIGHT_PAREN_ORD << 1)
+
 /* This global variable defines the particular regexp syntax to use (for
    some interfaces).  When a regexp is compiled, the syntax used is
    stored in the pattern buffer, so changing this does not affect