The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/ctype.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1982, 1988, 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  * (c) UNIX System Laboratories, Inc.
    7  * All or some portions of this file are derived from material licensed
    8  * to the University of California by American Telephone and Telegraph
    9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   10  * the permission of UNIX System Laboratories, Inc.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  * $FreeBSD: head/sys/sys/ctype.h 345499 2019-03-25 13:50:38Z hselasky $
   37  */
   38 
   39 #ifndef _SYS_CTYPE_H_
   40 #define _SYS_CTYPE_H_
   41 
   42 #ifdef _KERNEL
   43 
   44 static __inline int
   45 isspace(int c)
   46 {
   47         return (c == ' ' || (c >= '\t' && c <= '\r'));
   48 }
   49 
   50 static __inline int
   51 isascii(int c)
   52 {
   53         return ((c & ~0x7f) == 0);
   54 }
   55 
   56 static __inline int
   57 isupper(int c)
   58 {
   59         return (c >= 'A' && c <= 'Z');
   60 }
   61 
   62 static __inline int
   63 islower(int c)
   64 {
   65         return (c >= 'a' && c <= 'z');
   66 }
   67 
   68 static __inline int
   69 isalpha(int c)
   70 {
   71         return (isupper(c) || islower(c));
   72 }
   73 
   74 static __inline int
   75 isdigit(int c)
   76 {
   77         return (c >= '' && c <= '9');
   78 }
   79 
   80 static __inline int
   81 isxdigit(int c)
   82 {
   83         return (isdigit(c) || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f'));
   84 }
   85 
   86 static __inline int
   87 isprint(int c)
   88 {
   89         return (c >= ' ' && c <= '~');
   90 }
   91 
   92 static __inline int
   93 toupper(int c)
   94 {
   95         return (c - 0x20 * ((c >= 'a') && (c <= 'z')));
   96 }
   97 
   98 static __inline int
   99 tolower(int c)
  100 {
  101         return (c + 0x20 * ((c >= 'A') && (c <= 'Z')));
  102 }
  103 
  104 #endif
  105 #endif /* !_SYS_CTYPE_H_ */

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