Imported Upstream version 93u+upstream

1 files changed, 55 insertions, 0 deletions

diff --git a/src/lib/libast/string/chrtoi.c b/src/lib/libast/string/chrtoi.c
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+++ b/src/lib/libast/string/chrtoi.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
+/*
+ * Glenn Fowler
+ * AT&T Bell Laboratories
+ *
+ * convert a 0 terminated character constant string to an int
+ */
+
+#include <ast.h>
+
+int
+chrtoi(register const char* s)
+{
+	register int	c;
+	register int	n;
+	register int	x;
+	char*		p;
+
+	c = 0;
+	for (n = 0; n < sizeof(int) * CHAR_BIT; n += CHAR_BIT)
+	{
+		switch (x = *((unsigned char*)s++))
+		{
+		case '\\':
+			x = chresc(s - 1, &p);
+			s = (const char*)p;
+			break;
+		case 0:
+			return(c);
+		}
+		c = (c << CHAR_BIT) | x;
+	}
+	return(c);
+}