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isctype.c revision 1.27 
      1 /* $NetBSD: isctype.c,v 1.27 2025/03/29 01:06:36 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c)2008 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #if defined(LIBC_SCCS) && !defined(lint)
     31 __RCSID("$NetBSD: isctype.c,v 1.27 2025/03/29 01:06:36 riastradh Exp $");
     32 #endif /* LIBC_SCCS and not lint */
     33 
     34 #include "namespace.h"
     35 #include <sys/types.h>
     36 #include <sys/ctype_bits.h>
     37 #define _CTYPE_NOINLINE
     38 #include <assert.h>
     39 #include <ctype.h>
     40 #include <langinfo.h>
     41 #define __SETLOCALE_SOURCE__
     42 #include <locale.h>
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 #include <unistd.h>
     47 
     48 #if EOF != -1
     49 #error "EOF != -1"
     50 #endif
     51 
     52 #include "runetype_local.h"
     53 #include "setlocale_local.h"
     54 
     55 #define _RUNE_LOCALE(loc) \
     56     ((_RuneLocale *)((loc)->part_impl[LC_CTYPE]))
     57 
     58 static void __noinline __dead
     59 ctype_nasaldemon(const char *func, int c)
     60 {
     61 	char buf[128];
     62 
     63 	snprintf_ss(buf, sizeof(buf), "ctype(3) %s: invalid input: %d\n", func,
     64 	    c);
     65 	(void)write(STDERR_FILENO, buf, strlen(buf));
     66 	abort();
     67 }
     68 
     69 static inline void
     70 ctype_check(const char *func, int c)
     71 {
     72 
     73 	if (__predict_false((c != EOF && c < 0) || c > UCHAR_MAX))
     74 		ctype_nasaldemon(func, c);
     75 }
     76 
     77 #define	CTYPE_CHECK(c)	ctype_check(__func__, c)
     78 
     79 #define _ISCTYPE_FUNC(name, bit) \
     80 int \
     81 is##name(int c) \
     82 { \
     83 	CTYPE_CHECK(c); \
     84 	return (int)_ctype_tab_[c + 1] & (bit); \
     85 } \
     86 int \
     87 is##name ## _l(int c, locale_t loc) \
     88 { \
     89 	CTYPE_CHECK(c); \
     90 	return (int)((_RUNE_LOCALE(loc)->rl_ctype_tab[c + 1]) & (bit)); \
     91 }
     92 
     93 _ISCTYPE_FUNC(alnum, (_CTYPE_A|_CTYPE_D))
     94 _ISCTYPE_FUNC(alpha,  _CTYPE_A)
     95 _ISCTYPE_FUNC(blank,  _CTYPE_BL)
     96 _ISCTYPE_FUNC(cntrl,  _CTYPE_C            )
     97 _ISCTYPE_FUNC(digit,  _CTYPE_D)
     98 _ISCTYPE_FUNC(graph,  _CTYPE_G)
     99 _ISCTYPE_FUNC(lower,  _CTYPE_L            )
    100 _ISCTYPE_FUNC(print,  _CTYPE_R)
    101 _ISCTYPE_FUNC(punct,  _CTYPE_P            )
    102 _ISCTYPE_FUNC(space,  _CTYPE_S            )
    103 _ISCTYPE_FUNC(upper,  _CTYPE_U            )
    104 _ISCTYPE_FUNC(xdigit, _CTYPE_X)
    105 
    106 int
    107 toupper(int c)
    108 {
    109 	CTYPE_CHECK(c);
    110 	return (int)_toupper_tab_[c + 1];
    111 }
    112 
    113 int
    114 toupper_l(int c, locale_t loc)
    115 {
    116 	CTYPE_CHECK(c);
    117 	return (int)(_RUNE_LOCALE(loc)->rl_toupper_tab[c + 1]);
    118 }
    119 
    120 int
    121 tolower(int c)
    122 {
    123 	CTYPE_CHECK(c);
    124 	return (int)_tolower_tab_[c + 1];
    125 }
    126 
    127 int
    128 tolower_l(int c, locale_t loc)
    129 {
    130 	CTYPE_CHECK(c);
    131 	return (int)(_RUNE_LOCALE(loc)->rl_tolower_tab[c + 1]);
    132 }
    133 
    134 int
    135 _toupper(int c)
    136 {
    137 	return (c - 'a' + 'A');
    138 }
    139 
    140 int
    141 _tolower(int c)
    142 {
    143 	return (c - 'A' + 'a');
    144 }
    145