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      1 /*	$OpenBSD: isctype.c,v 1.12 2015/09/13 11:38:08 guenther Exp $ */
      2 /*
      3  * Copyright (c) 1989 The Regents of the University of California.
      4  * All rights reserved.
      5  * (c) UNIX System Laboratories, Inc.
      6  * All or some portions of this file are derived from material licensed
      7  * to the University of California by American Telephone and Telegraph
      8  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
      9  * the permission of UNIX System Laboratories, Inc.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #define _ANSI_LIBRARY
     37 #include <ctype.h>
     38 #include <stdio.h>
     39 
     40 #undef isalnum
     41 int
     42 isalnum(int c)
     43 {
     44 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_U|_L|_N)));
     45 }
     46 DEF_STRONG(isalnum);
     47 
     48 #undef isalpha
     49 int
     50 isalpha(int c)
     51 {
     52 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_U|_L)));
     53 }
     54 DEF_STRONG(isalpha);
     55 
     56 #undef isblank
     57 int
     58 isblank(int c)
     59 {
     60 	return (c == ' ' || c == '\t');
     61 }
     62 DEF_STRONG(isblank);
     63 
     64 #undef iscntrl
     65 int
     66 iscntrl(int c)
     67 {
     68 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _C));
     69 }
     70 DEF_STRONG(iscntrl);
     71 
     72 #undef isdigit
     73 int
     74 isdigit(int c)
     75 {
     76 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _N));
     77 }
     78 DEF_STRONG(isdigit);
     79 
     80 #undef isgraph
     81 int
     82 isgraph(int c)
     83 {
     84 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_P|_U|_L|_N)));
     85 }
     86 DEF_STRONG(isgraph);
     87 
     88 #undef islower
     89 int
     90 islower(int c)
     91 {
     92 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _L));
     93 }
     94 DEF_STRONG(islower);
     95 
     96 #undef isprint
     97 int
     98 isprint(int c)
     99 {
    100 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_P|_U|_L|_N|_B)));
    101 }
    102 DEF_STRONG(isprint);
    103 
    104 #undef ispunct
    105 int
    106 ispunct(int c)
    107 {
    108 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _P));
    109 }
    110 DEF_STRONG(ispunct);
    111 
    112 #undef isspace
    113 int
    114 isspace(int c)
    115 {
    116 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _S));
    117 }
    118 DEF_STRONG(isspace);
    119 
    120 #undef isupper
    121 int
    122 isupper(int c)
    123 {
    124 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & _U));
    125 }
    126 DEF_STRONG(isupper);
    127 
    128 #undef isxdigit
    129 int
    130 isxdigit(int c)
    131 {
    132 	return (c == EOF ? 0 : ((_ctype_ + 1)[(unsigned char)c] & (_N|_X)));
    133 }
    134 DEF_STRONG(isxdigit);
    135 
    136 #undef isascii
    137 int
    138 isascii(int c)
    139 {
    140 	return ((unsigned int)c <= 0177);
    141 }
    142 DEF_WEAK(isascii);
    143 
    144 #undef toascii
    145 int
    146 toascii(int c)
    147 {
    148 	return (c & 0177);
    149 }
    150 
    151 #undef _toupper
    152 int
    153 _toupper(int c)
    154 {
    155 	return (c - 'a' + 'A');
    156 }
    157 
    158 #undef _tolower
    159 int
    160 _tolower(int c)
    161 {
    162 	return (c - 'A' + 'a');
    163 }
    164