165 lines
5.2 KiB
C
165 lines
5.2 KiB
C
/* Copyright (C) 1991, 92, 93, 95, 96 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* ANSI Standard 4.3: CHARACTER HANDLING <ctype.h>
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*/
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#ifndef _CTYPE_H
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#define _CTYPE_H 1
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#include <features.h>
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__BEGIN_DECLS
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#ifndef _ISbit
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/* These are all the characteristics of characters.
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If there get to be more than 16 distinct characteristics,
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many things must be changed that use `unsigned short int's.
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The characteristics are stored always in network byte order (big
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endian). We define the bit value interpretations here dependent on the
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machine's byte order. */
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#include <endian.h>
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define _ISbit(bit) (1 << bit)
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#else /* __BYTE_ORDER == __LITTLE_ENDIAN */
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#define _ISbit(bit) (bit < 8 ? ((1 << bit) << 8) : ((1 << bit) >> 8))
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#endif
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enum
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{
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_ISupper = _ISbit (0), /* UPPERCASE. */
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_ISlower = _ISbit (1), /* lowercase. */
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_ISalpha = _ISbit (2), /* Alphabetic. */
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_ISdigit = _ISbit (3), /* Numeric. */
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_ISxdigit = _ISbit (4), /* Hexadecimal numeric. */
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_ISspace = _ISbit (5), /* Whitespace. */
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_ISprint = _ISbit (6), /* Printing. */
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_ISgraph = _ISbit (7), /* Graphical. */
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_ISblank = _ISbit (8), /* Blank (usually SPC and TAB). */
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_IScntrl = _ISbit (9), /* Control character. */
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_ISpunct = _ISbit (10), /* Punctuation. */
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_ISalnum = _ISbit (11) /* Alphanumeric. */
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};
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#endif /* ! _ISbit */
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/* These are defined in ctype-info.c.
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The declarations here must match those in localeinfo.h.
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These point into arrays of 384, so they can be indexed by any `unsigned
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char' value [0,255]; by EOF (-1); or by any `signed char' value
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[-128,-1). ANSI requires that the ctype functions work for `unsigned
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char' values and for EOF; we also support negative `signed char' values
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for broken old programs. The case conversion arrays are of `int's
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rather than `unsigned char's because tolower (EOF) must be EOF, which
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doesn't fit into an `unsigned char'. But today more important is that
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the arrays are also used for multi-byte character sets. */
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extern __const unsigned short int *__ctype_b; /* Characteristics. */
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extern __const int *__ctype_tolower; /* Case conversions. */
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extern __const int *__ctype_toupper; /* Case conversions. */
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#define __isctype(c, type) \
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(__ctype_b[(int) (c)] & (unsigned short int) type)
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#define __isascii(c) (((c) & (1 << 7)) == 0) /* If high bit is set. */
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#define __toascii(c) ((c) & 0x7f) /* Mask off high bit. */
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#define __tolower(c) ((int) __ctype_tolower[(int) (c)])
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#define __toupper(c) ((int) __ctype_toupper[(int) (c)])
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#define __exctype(name) extern int name __P ((int))
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/* The following names are all functions:
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int isCHARACTERISTIC(int c);
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which return nonzero iff C has CHARACTERISTIC.
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For the meaning of the characteristic names, see the `enum' above. */
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__exctype (isalnum);
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__exctype (isalpha);
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__exctype (iscntrl);
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__exctype (isdigit);
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__exctype (islower);
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__exctype (isgraph);
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__exctype (isprint);
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__exctype (ispunct);
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__exctype (isspace);
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__exctype (isupper);
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__exctype (isxdigit);
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#ifdef __USE_GNU
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__exctype (isblank);
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#endif
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/* Return the lowercase version of C. */
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extern int tolower __P ((int __c));
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/* Return the uppercase version of C. */
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extern int toupper __P ((int __c));
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#if defined(__USE_SVID) || defined(__USE_MISC)
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/* Return nonzero iff C is in the ASCII set
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(i.e., is no more than 7 bits wide). */
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extern int isascii __P ((int __c));
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/* Return the part of C that is in the ASCII set
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(i.e., the low-order 7 bits of C). */
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extern int toascii __P ((int __c));
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#endif /* Use SVID or use misc. */
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#ifdef __USE_SVID
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/* These are the same as `toupper' and `tolower'. */
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__exctype (_toupper);
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__exctype (_tolower);
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#endif
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#ifndef __NO_CTYPE
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#define isalnum(c) __isctype((c), _ISalnum)
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#define isalpha(c) __isctype((c), _ISalpha)
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#define iscntrl(c) __isctype((c), _IScntrl)
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#define isdigit(c) __isctype((c), _ISdigit)
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#define islower(c) __isctype((c), _ISlower)
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#define isgraph(c) __isctype((c), _ISgraph)
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#define isprint(c) __isctype((c), _ISprint)
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#define ispunct(c) __isctype((c), _ISpunct)
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#define isspace(c) __isctype((c), _ISspace)
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#define isupper(c) __isctype((c), _ISupper)
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#define isxdigit(c) __isctype((c), _ISxdigit)
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#ifdef __USE_GNU
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#define isblank(c) __isctype((c), _ISblank)
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#endif
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#define tolower(c) __tolower(c)
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#define toupper(c) __toupper(c)
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#if defined(__USE_SVID) || defined(__USE_MISC)
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#define isascii(c) __isascii(c)
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#define toascii(c) __toascii(c)
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#endif
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#endif /* Not __NO_CTYPE. */
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__END_DECLS
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#endif /* ctype.h */
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