Imported Upstream version 93u+upstream

1 files changed, 54 insertions, 0 deletions

diff --git a/src/lib/libast/regex/regexec.c b/src/lib/libast/regex/regexec.c
new file mode 100644
index 0000000..fb8f428
--- /dev/null
+++ b/src/lib/libast/regex/regexec.c
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+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+
+/*
+ * posix regex executor
+ * single unsized-string interface
+ */
+
+#include "reglib.h"
+
+/*
+ * standard wrapper for the sized-record interface
+ */
+
+int
+regexec(const regex_t* p, const char* s, size_t nmatch, regmatch_t* match, regflags_t flags)
+{
+	if (flags & REG_STARTEND)
+	{
+		int		r;
+		int		m = match->rm_so;
+		regmatch_t*	e;
+
+		if (!(r = regnexec(p, s + m, match->rm_eo - m, nmatch, match, flags)) && m > 0)
+			for (e = match + nmatch; match < e; match++)
+				if (match->rm_so >= 0)
+				{
+					match->rm_so += m;
+					match->rm_eo += m;
+				}
+		return r;
+	}
+	return regnexec(p, s, s ? strlen(s) : 0, nmatch, match, flags);
+}