glibc/ctype/ctype.h

/* Copyright (C) 1991, 92, 93, 95, 96, 97 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 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/*
 *	ISO C Standard 4.3: CHARACTER HANDLING	<ctype.h>
 */

#ifndef	_CTYPE_H

#define	_CTYPE_H	1
#include <features.h>

__BEGIN_DECLS

#ifndef _ISbit
/* These are all the characteristics of characters.
   If there get to be more than 16 distinct characteristics,
   many things must be changed that use `unsigned short int's.

   The characteristics are stored always in network byte order (big
   endian).  We define the bit value interpretations here dependent on the
   machine's byte order.  */

#include <endian.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define _ISbit(bit)	(1 << bit)
#else /* __BYTE_ORDER == __LITTLE_ENDIAN */
#define _ISbit(bit)	(bit < 8 ? ((1 << bit) << 8) : ((1 << bit) >> 8))
#endif

enum
{
  _ISupper = _ISbit (0),	/* UPPERCASE.  */
  _ISlower = _ISbit (1),	/* lowercase.  */
  _ISalpha = _ISbit (2),	/* Alphabetic.  */
  _ISdigit = _ISbit (3),	/* Numeric.  */
  _ISxdigit = _ISbit (4),	/* Hexadecimal numeric.  */
  _ISspace = _ISbit (5),	/* Whitespace.  */
  _ISprint = _ISbit (6),	/* Printing.  */
  _ISgraph = _ISbit (7),	/* Graphical.  */
  _ISblank = _ISbit (8),	/* Blank (usually SPC and TAB).  */
  _IScntrl = _ISbit (9),	/* Control character.  */
  _ISpunct = _ISbit (10),	/* Punctuation.  */
  _ISalnum = _ISbit (11)	/* Alphanumeric.  */
};
#endif /* ! _ISbit  */

/* These are defined in ctype-info.c.
   The declarations here must match those in localeinfo.h.

   These point into arrays of 384, so they can be indexed by any `unsigned
   char' value [0,255]; by EOF (-1); or by any `signed char' value
   [-128,-1).  ISO C requires that the ctype functions work for `unsigned
   char' values and for EOF; we also support negative `signed char' values
   for broken old programs.  The case conversion arrays are of `int's
   rather than `unsigned char's because tolower (EOF) must be EOF, which
   doesn't fit into an `unsigned char'.  But today more important is that
   the arrays are also used for multi-byte character sets.  */
extern __const unsigned short int *__ctype_b;	/* Characteristics.  */
extern __const int *__ctype_tolower; /* Case conversions.  */
extern __const int *__ctype_toupper; /* Case conversions.  */

#define	__isctype(c, type) \
  (__ctype_b[(int) (c)] & (unsigned short int) type)

#define	__isascii(c)	(((c) & ~0x7f) == 0)	/* If C is a 7 bit value.  */
#define	__toascii(c)	((c) & 0x7f)		/* Mask off high bits.  */

#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) || defined(__USE_XOPEN)

/* 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.  */

#if defined(__USE_SVID) || defined(__USE_MISC) || defined(__USE_XOPEN)
/* 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) || defined(__USE_XOPEN)
#define	isascii(c)	__isascii(c)
#define	toascii(c)	__toascii(c)
#endif

#endif /* Not __NO_CTYPE.  */


#ifdef __USE_GNU
/* The concept of one static locale per category is not very well
   thought out.  Many applications will need to process its data using
   information from several different locales.  Another application is
   the implementation of the internationalization handling in the
   upcoming ISO C++ standard library.  To support this another set of
   the functions using locale data exist which have an additional
   argument.

   Attention: all these functions are *not* standardized in any form.
   This is a proof-of-concept implementation.  */

/* Structure for reentrant locale using functions.  This is an
   (almost) opaque type for the user level programs.  */
# include <xlocale.h>

/* These definitions are similar to the ones above but all functions
   take as an argument a handle for the locale which shall be used.  */
#define	__isctype_l(c, type, locale) \
  ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type)

#define	__tolower_l(c, locale)	((int) (locale)->__ctype_tolower[(int) (c)])
#define	__toupper_l(c, locale)	((int) (locale)->__ctype_toupper[(int) (c)])

#define	__exctype_l(name)	extern int name __P ((int, __locale_t))

/* The following names are all functions:
     int isCHARACTERISTIC(int c, locale_t *locale);
   which return nonzero iff C has CHARACTERISTIC.
   For the meaning of the characteristic names, see the `enum' above.  */
__exctype_l (__isalnum_l);
__exctype_l (__isalpha_l);
__exctype_l (__iscntrl_l);
__exctype_l (__isdigit_l);
__exctype_l (__islower_l);
__exctype_l (__isgraph_l);
__exctype_l (__isprint_l);
__exctype_l (__ispunct_l);
__exctype_l (__isspace_l);
__exctype_l (__isupper_l);
__exctype_l (__isxdigit_l);

__exctype_l (__isblank_l);


/* Return the lowercase version of C in locale L.  */
extern int __tolower_l __P ((int __c, __locale_t __l));

/* Return the uppercase version of C.  */
extern int __toupper_l __P ((int __c, __locale_t __l));


#ifndef	__NO_CTYPE
#define	__isalnum_l(c,l)	__isctype_l((c), _ISalnum, (l))
#define	__isalpha_l(c,l)	__isctype_l((c), _ISalpha, (l))
#define	__iscntrl_l(c,l)	__isctype_l((c), _IScntrl, (l))
#define	__isdigit_l(c,l)	__isctype_l((c), _ISdigit, (l))
#define	__islower_l(c,l)	__isctype_l((c), _ISlower, (l))
#define	__isgraph_l(c,l)	__isctype_l((c), _ISgraph, (l))
#define	__isprint_l(c,l)	__isctype_l((c), _ISprint, (l))
#define	__ispunct_l(c,l)	__isctype_l((c), _ISpunct, (l))
#define	__isspace_l(c,l)	__isctype_l((c), _ISspace, (l))
#define	__isupper_l(c,l)	__isctype_l((c), _ISupper, (l))
#define	__isxdigit_l(c,l)	__isctype_l((c), _ISxdigit, (l))

#define	__isblank_l(c,l)	__isctype_l((c), _ISblank, (l))

#if defined(__USE_SVID) || defined(__USE_MISC) || defined(__USE_XOPEN)
#define	__isascii_l(c,l)	__isascii(c)
#define	__toascii_l(c,l)	__toascii(c)
#endif

#endif /* Not __NO_CTYPE.  */

#endif /* Use GNU.  */

__END_DECLS

#endif /* ctype.h  */