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/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/*
* ANSI Standard 4.3: CHARACTER HANDLING <ctype.h>
*/
#ifndef _CTYPE_H
#define _CTYPE_H 1
#include <features.h>
__BEGIN_DECLS
/* These are all the characteristics of characters. All the
interdependencies (such as that an alphabetic is an uppercase or a
lowercase) are here. If there get to be more than
(sizeof (unsigned short int) * CHAR_BIT) distinct characteristics,
many things must be changed that use `unsigned short int's. */
enum
{
_ISupper = 1 << 0, /* UPPERCASE. */
_ISlower = 1 << 1, /* lowercase. */
_ISalpha = 1 << 2, /* Alphabetic. */
_ISdigit = 1 << 3, /* Numeric. */
_ISxdigit = 1 << 4, /* Hexadecimal numeric. */
_ISspace = 1 << 5, /* Whitespace. */
_ISprint = 1 << 6, /* Printing. */
_ISgraph = 1 << 7, /* Graphical. */
_ISblank = 1 << 8, /* Blank (usually SPC and TAB). */
_IScntrl = 1 << 9, /* Control character. */
_ISpunct = 1 << 10, /* Punctuation. */
/* The following are defined in POSIX.2 as being combinations of the
classes above. */
_ISalnum = _ISalpha | _ISdigit /* Alphanumeric. */
};
/* These are defined in localeinfo.c.
The declarations here must match those in localeinfo.h.
These point to the second element ([1]) of arrays of size (UCHAR_MAX + 1).
EOF is -1, so [EOF] is the first element of the original array.
ANSI requires that the ctype functions work for `unsigned char' values
and for EOF. The case conversion arrays are of `short int's rather than
`unsigned char's because tolower (EOF) must be EOF, which doesn't fit
into an `unsigned char'. */
extern __const unsigned short int *__ctype_b; /* Characteristics. */
extern __const short int *__ctype_tolower; /* Case conversions. */
extern __const short int *__ctype_toupper; /* Case conversions. */
#define __isctype(c, type) \
(__ctype_b[(int) (c)] & (unsigned short int) type)
#define __isascii(c) (((c) & (1 << 7)) == 0) /* If high bit is set. */
#define __toascii(c) ((c) & 0x7f) /* Mask off high bit. */
#define __tolower(c) ((int) __ctype_tolower[(int) (c)])
#define __toupper(c) ((int) __ctype_toupper[(int) (c)])
#define __exctype(name) extern int name __P ((int))
/* The following names are all functions:
int isCHARACTERISTIC(int c);
which return nonzero iff C has CHARACTERISTIC.
For the meaning of the characteristic names, see the `enum' above. */
__exctype (isalnum);
__exctype (isalpha);
__exctype (iscntrl);
__exctype (isdigit);
__exctype (islower);
__exctype (isgraph);
__exctype (isprint);
__exctype (ispunct);
__exctype (isspace);
__exctype (isupper);
__exctype (isxdigit);
#ifdef __USE_GNU
__exctype (isblank);
#endif
/* Return the lowercase version of C. */
extern int tolower __P ((int __c));
/* Return the uppercase version of C. */
extern int toupper __P ((int __c));
#if defined(__USE_SVID) || defined(__USE_MISC)
/* Return nonzero iff C is in the ASCII set
(i.e., is no more than 7 bits wide). */
extern int isascii __P ((int __c));
/* Return the part of C that is in the ASCII set
(i.e., the low-order 7 bits of C). */
extern int toascii __P ((int __c));
#endif /* Use SVID or use misc. */
#ifdef __USE_SVID
/* These are the same as `toupper' and `tolower'. */
__exctype (_toupper);
__exctype (_tolower);
#endif
#ifndef __NO_CTYPE
#define isalnum(c) __isctype((c), _ISalnum)
#define isalpha(c) __isctype((c), _ISalpha)
#define iscntrl(c) __isctype((c), _IScntrl)
#define isdigit(c) __isctype((c), _ISdigit)
#define islower(c) __isctype((c), _ISlower)
#define isgraph(c) __isctype((c), _ISgraph)
#define isprint(c) __isctype((c), _ISprint)
#define ispunct(c) __isctype((c), _ISpunct)
#define isspace(c) __isctype((c), _ISspace)
#define isupper(c) __isctype((c), _ISupper)
#define isxdigit(c) __isctype((c), _ISxdigit)
#ifdef __USE_GNU
#define isblank(c) __isctype((c), _ISblank)
#endif
#define tolower(c) __tolower(c)
#define toupper(c) __toupper(c)
#if defined(__USE_SVID) || defined(__USE_MISC)
#define isascii(c) __isascii(c)
#define toascii(c) __toascii(c)
#endif
#endif /* Not __NO_CTYPE. */
__END_DECLS
#endif /* ctype.h */
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