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diff --git a/include/mach/sa/ctype.h b/include/mach/sa/ctype.h
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+/*
+ * Copyright (c) 1994 The University of Utah and
+ * the Computer Systems Laboratory (CSL). All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ * Author: Bryan Ford, University of Utah CSL
+ */
+#ifndef _MACH_CTYPE_H_
+#define _MACH_CTYPE_H_
+
+#include <sys/cdefs.h>
+
+__INLINE_FUNC int isdigit(char c)
+{
+ return ((c) >= '0') && ((c) <= '9');
+}
+
+__INLINE_FUNC int isspace(char c)
+{
+ return ((c) == ' ') || ((c) == '\f')
+ || ((c) == '\n') || ((c) == '\r')
+ || ((c) == '\t') || ((c) == '\v');
+}
+
+__INLINE_FUNC int isalpha(char c)
+{
+ return (((c) >= 'a') && ((c) <= 'z'))
+ || (((c) >= 'A') && ((c) <= 'Z'));
+}
+
+__INLINE_FUNC int isalnum(char c)
+{
+ return isalpha(c) || isdigit(c);
+}
+
+__INLINE_FUNC int toupper(char c)
+{
+ return ((c >= 'a') && (c <= 'z')) ? (c - 'a' + 'A') : c;
+}
+
+__INLINE_FUNC int tolower(char c)
+{
+ return ((c >= 'A') && (c <= 'Z')) ? (c - 'A' + 'a') : c;
+}
+
+
+#endif _MACH_CTYPE_H_