-/* ctype.h 4.2 85/09/04 */
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)ctype.h 5.3 (Berkeley) 4/3/91
+ */
-#define _U 01
-#define _L 02
-#define _N 04
-#define _S 010
-#define _P 020
-#define _C 040
-#define _X 0100
-#define _B 0200
+#ifndef _CTYPE_H_
+#define _CTYPE_H_
-extern char _ctype_[];
+#define _U 0x01
+#define _L 0x02
+#define _N 0x04
+#define _S 0x08
+#define _P 0x10
+#define _C 0x20
+#define _X 0x40
+#define _B 0x80
-#define isalpha(c) ((_ctype_+1)[c]&(_U|_L))
-#define isupper(c) ((_ctype_+1)[c]&_U)
-#define islower(c) ((_ctype_+1)[c]&_L)
-#define isdigit(c) ((_ctype_+1)[c]&_N)
-#define isxdigit(c) ((_ctype_+1)[c]&(_N|_X))
-#define isspace(c) ((_ctype_+1)[c]&_S)
-#define ispunct(c) ((_ctype_+1)[c]&_P)
-#define isalnum(c) ((_ctype_+1)[c]&(_U|_L|_N))
-#define isprint(c) ((_ctype_+1)[c]&(_P|_U|_L|_N|_B))
-#define isgraph(c) ((_ctype_+1)[c]&(_P|_U|_L|_N))
-#define iscntrl(c) ((_ctype_+1)[c]&_C)
-#define isascii(c) ((unsigned)(c)<=0177)
-#define toupper(c) ((c)-'a'+'A')
-#define tolower(c) ((c)-'A'+'a')
-#define toascii(c) ((c)&0177)
+extern char _ctype_[];
+
+#define isdigit(c) ((_ctype_ + 1)[c] & _N)
+#define islower(c) ((_ctype_ + 1)[c] & _L)
+#define isspace(c) ((_ctype_ + 1)[c] & _S)
+#define ispunct(c) ((_ctype_ + 1)[c] & _P)
+#define isupper(c) ((_ctype_ + 1)[c] & _U)
+#define isalpha(c) ((_ctype_ + 1)[c] & (_U|_L))
+#define isxdigit(c) ((_ctype_ + 1)[c] & (_N|_X))
+#define isalnum(c) ((_ctype_ + 1)[c] & (_U|_L|_N))
+#define isprint(c) ((_ctype_ + 1)[c] & (_P|_U|_L|_N|_B))
+#define isgraph(c) ((_ctype_ + 1)[c] & (_P|_U|_L|_N))
+#define iscntrl(c) ((_ctype_ + 1)[c] & _C)
+#define isascii(c) ((unsigned)(c) <= 0177)
+#define toupper(c) ((c) - 'a' + 'A')
+#define tolower(c) ((c) - 'A' + 'a')
+#define toascii(c) ((c) & 0177)
+
+#endif /* !_CTYPE_H_ */