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/* Copyright (C) 1991, 1992, 1993 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.  */

  _IScntrl = 1 << 2,                    /* Control character.  */

  _ISdigit = 1 << 3,                    /* Numeric.  */

  _ISspace = 1 << 4,                    /* Whitespace.  */

  _IShex = 1 << 5,                      /* A - F, a - f.  */

  _ISpunct = 1 << 6,                    /* Punctuation.  */

  _NOgraph = 1 << 7,                    /* Printing but nongraphical.  */

  _ISblank = 1 << 8,                    /* Blank (usually SPC and TAB).  */

  _ISalpha = _ISupper | _ISlower,       /* Alphabetic.  */

  _ISalnum = _ISalpha | _ISdigit,       /* Alphanumeric.  */

  _ISxdigit = _ISdigit | _IShex,        /* Hexadecimal numeric.  */

  _ISgraph = _ISalnum | _ISpunct,       /* Graphical.  */

  _ISprint = _ISgraph | _NOgraph        /* Printing.  */

};

/* 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 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  */