1/* Copyright (C) 1991,92,93,95,96,97,98,99,2001 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19/* 20 * ISO C99 Standard 7.4: Character handling <ctype.h> 21 */ 22 23#ifndef _CTYPE_H 24#define _CTYPE_H 1 25 26#include <features.h> 27#include <bits/types.h> 28 29__BEGIN_DECLS 30 31#ifndef _ISbit 32/* These are all the characteristics of characters. 33 If there get to be more than 16 distinct characteristics, 34 many things must be changed that use `unsigned short int's. 35 36 The characteristics are stored always in network byte order (big 37 endian). We define the bit value interpretations here dependent on the 38 machine's byte order. */ 39 40# include <endian.h> 41# if __BYTE_ORDER == __BIG_ENDIAN 42# define _ISbit(bit) (1 << (bit)) 43# else /* __BYTE_ORDER == __LITTLE_ENDIAN */ 44# define _ISbit(bit) ((bit) < 8 ? ((1 << (bit)) << 8) : ((1 << (bit)) >> 8)) 45# endif 46 47enum 48{ 49 _ISupper = _ISbit (0), /* UPPERCASE. */ 50 _ISlower = _ISbit (1), /* lowercase. */ 51 _ISalpha = _ISbit (2), /* Alphabetic. */ 52 _ISdigit = _ISbit (3), /* Numeric. */ 53 _ISxdigit = _ISbit (4), /* Hexadecimal numeric. */ 54 _ISspace = _ISbit (5), /* Whitespace. */ 55 _ISprint = _ISbit (6), /* Printing. */ 56 _ISgraph = _ISbit (7), /* Graphical. */ 57 _ISblank = _ISbit (8), /* Blank (usually SPC and TAB). */ 58 _IScntrl = _ISbit (9), /* Control character. */ 59 _ISpunct = _ISbit (10), /* Punctuation. */ 60 _ISalnum = _ISbit (11) /* Alphanumeric. */ 61}; 62#endif /* ! _ISbit */ 63 64/* These are defined in ctype-info.c. 65 The declarations here must match those in localeinfo.h. 66 67 These point into arrays of 384, so they can be indexed by any `unsigned 68 char' value [0,255]; by EOF (-1); or by any `signed char' value 69 [-128,-1). ISO C requires that the ctype functions work for `unsigned 70 char' values and for EOF; we also support negative `signed char' values 71 for broken old programs. The case conversion arrays are of `int's 72 rather than `unsigned char's because tolower (EOF) must be EOF, which 73 doesn't fit into an `unsigned char'. But today more important is that 74 the arrays are also used for multi-byte character sets. */ 75extern __const unsigned short int *__ctype_b; /* Characteristics. */ 76extern __const __int32_t *__ctype_tolower; /* Case conversions. */ 77extern __const __int32_t *__ctype_toupper; /* Case conversions. */ 78 79#define __isctype(c, type) \ 80 (__ctype_b[(int) (c)] & (unsigned short int) type) 81 82#define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */ 83#define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */ 84 85#define __exctype(name) extern int name (int) __THROW 86 87/* The following names are all functions: 88 int isCHARACTERISTIC(int c); 89 which return nonzero iff C has CHARACTERISTIC. 90 For the meaning of the characteristic names, see the `enum' above. */ 91__exctype (isalnum); 92__exctype (isalpha); 93__exctype (iscntrl); 94__exctype (isdigit); 95__exctype (islower); 96__exctype (isgraph); 97__exctype (isprint); 98__exctype (ispunct); 99__exctype (isspace); 100__exctype (isupper); 101__exctype (isxdigit); 102 103#ifdef __USE_ISOC99 104__exctype (isblank); 105#endif 106 107 108/* Return the lowercase version of C. */ 109extern int tolower (int __c) __THROW; 110 111/* Return the uppercase version of C. */ 112extern int toupper (int __c) __THROW; 113 114 115#if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN 116 117/* Return nonzero iff C is in the ASCII set 118 (i.e., is no more than 7 bits wide). */ 119extern int isascii (int __c) __THROW; 120 121/* Return the part of C that is in the ASCII set 122 (i.e., the low-order 7 bits of C). */ 123extern int toascii (int __c) __THROW; 124 125/* These are the same as `toupper' and `tolower' except that they do not 126 check the argument for being in the range of a `char'. */ 127__exctype (_toupper); 128__exctype (_tolower); 129#endif /* Use SVID or use misc. */ 130 131/* This code is needed for the optimized mapping functions. */ 132#define __tobody(c, f, a, args) \ 133 (__extension__ \ 134 ({ int __res; \ 135 if (sizeof (c) > 1) \ 136 { \ 137 if (__builtin_constant_p (c)) \ 138 { \ 139 int __c = (c); \ 140 __res = __c < -128 || __c > 255 ? __c : a[__c]; \ 141 } \ 142 else \ 143 __res = f args; \ 144 } \ 145 else \ 146 __res = a[(int) (c)]; \ 147 __res; })) 148 149#ifndef __NO_CTYPE 150# define isalnum(c) __isctype((c), _ISalnum) 151# define isalpha(c) __isctype((c), _ISalpha) 152# define iscntrl(c) __isctype((c), _IScntrl) 153# define isdigit(c) __isctype((c), _ISdigit) 154# define islower(c) __isctype((c), _ISlower) 155# define isgraph(c) __isctype((c), _ISgraph) 156# define isprint(c) __isctype((c), _ISprint) 157# define ispunct(c) __isctype((c), _ISpunct) 158# define isspace(c) __isctype((c), _ISspace) 159# define isupper(c) __isctype((c), _ISupper) 160# define isxdigit(c) __isctype((c), _ISxdigit) 161 162# ifdef __USE_ISOC99 163# define isblank(c) __isctype((c), _ISblank) 164# endif 165 166# ifdef __USE_EXTERN_INLINES 167extern __inline int 168tolower (int __c) __THROW 169{ 170 return __c >= -128 && __c < 256 ? __ctype_tolower[__c] : __c; 171} 172 173extern __inline int 174toupper (int __c) __THROW 175{ 176 return __c >= -128 && __c < 256 ? __ctype_toupper[__c] : __c; 177} 178# endif 179 180# if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus 181# define tolower(c) __tobody (c, tolower, __ctype_tolower, (c)) 182# define toupper(c) __tobody (c, toupper, __ctype_toupper, (c)) 183# endif /* Optimizing gcc */ 184 185# if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN 186# define isascii(c) __isascii (c) 187# define toascii(c) __toascii (c) 188 189# define _tolower(c) ((int) __ctype_tolower[(int) (c)]) 190# define _toupper(c) ((int) __ctype_toupper[(int) (c)]) 191# endif 192 193#endif /* Not __NO_CTYPE. */ 194 195__END_DECLS 196 197#endif /* ctype.h */ 198