Imported Upstream version 93u+upstream

1 files changed, 49 insertions, 0 deletions

diff --git a/src/lib/libast/hash/strkey.c b/src/lib/libast/hash/strkey.c
new file mode 100644
index 0000000..3ff7ead
--- /dev/null
+++ b/src/lib/libast/hash/strkey.c
@@ -0,0 +1,49 @@
+/***********************************************************************
+*                                                                      *
+*               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
+/*
+ * Glenn Fowler
+ * AT&T Research
+ */
+
+#include <ast.h>
+#include <hashkey.h>
+
+long
+strkey(register const char* s)
+{
+	register long	x = 0;
+	register int	n = 0;
+	register int	c;
+
+	while (n++ < HASHKEYMAX)
+	{
+		c = *s;
+		if (c >= 'a' && c <= 'z')
+			x = HASHKEYPART(x, c);
+		else if (c >= '0' && c <= '9')
+			x = HASHKEYPART(x, HASHKEYN(c));
+		else break;
+		s++;
+	}
+	return x;
+}