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ISWALPHA(3C)							  ISWALPHA(3C)

NAME
       iswalpha,  isenglish,  isideogram,  isnumber,  isphonogram,  isspecial,
       iswalnum, iswascii, iswblank, iswcntrl, iswdigit,  iswgraph,  iswlower,
       iswprint, iswpunct, iswspace, iswupper, iswxdigit - wide-character code
       classification functions

SYNOPSIS
       #include <wchar.h>
       #include <wctype.h>

       int iswalpha(wint_t wc);

       int isenglish(wint_t wc);

       int isideogram(wint_t wc);

       int isnumber(wint_t wc);

       int isphonogram(wint_t wc);

       int isspecial(wint_t wc);

       int iswalnum(wint_t wc);

       int iswascii(wint_t wc);

       int iswblank(wint_t wc);

       int iswcntrl(wint_t wc);

       int iswdigit(wint_t wc);

       int iswgraph(wint_t wc);

       int iswlower(wint_t wc);

       int iswprint(wint_t wc);

       int iswpunct(wint_t wc);

       int iswspace(wint_t wc);

       int iswupper(wint_t wc);

       int iswxdigit(wint_t wc);

DESCRIPTION
       These functions test whether wc is a wide-character code representing a
       character of a particular class defined in the LC_CTYPE category of the
       current locale.

       In all cases, wc is a wint_t, the value of which must be a wide-charac‐
       ter  code  corresponding	 to a valid character in the current locale or
       must equal the value of the macro WEOF. If the argument has  any	 other
       values, the behavior is undefined.

       iswalpha(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "alpha"  in	the  program's
			  current locale.

       isenglish(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing an English language character,  excluding	 ASCII
			  characters.

       isideogram(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing an  ideographic  language	 character,  excluding
			  ASCII characters.

       isnumber(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing digit [0−9], excluding ASCII characters.

       isphonogram(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing  a  phonetic language character, excluding ASCII
			  characters.

       isspecial(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing  a  special  language character, excluding ASCII
			  characters.

       iswalnum(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing  a  character of class "alpha" or "digit" in the
			  program's current locale.

       iswascii(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing an ASCII character.

       iswblank(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "blank"  in	the  program's
			  current  locale.  This  function is not available to
			  applications conforming to standards prior to SUSv3.
			  See standards(5).

       iswlower(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "lower"  in	the  program's
			  current locale.

       iswcntrl(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "cntrl"  in	the  program's
			  current locale.

       iswdigit(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "digit"  in	the  program's
			  current locale.

       iswgraph(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "graph"  in	the  program's
			  current locale.

       iswprint(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "print"  in	the  program's
			  current locale.

       iswpunct(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "punct"  in	the  program's
			  current locale.

       iswspace(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "space"  in	the  program's
			  current locale.

       iswupper(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "upper"  in	the  program's
			  current locale.

       iswxdigit(wc)
			  Tests whether wc is a wide-character code represent‐
			  ing a character of class "xdigit" in	the  program's
			  current locale.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌────────────────────┬─────────────────────────┐
       │ATTRIBUTE TYPE	    │ ATTRIBUTE VALUE	      │
       ├────────────────────┼─────────────────────────┤
       │CSI		    │ Enabled		      │
       ├────────────────────┼─────────────────────────┤
       │Interface Stability │ See  below.	      │
       ├────────────────────┼─────────────────────────┤
       │MT-Level	    │ MT-Safe with exceptions │
       └────────────────────┴─────────────────────────┘

       The  iswalpha(),	 iswalnum(),  iswblank(), iswcntrl(), iswdigit(), isw‐
       graph(), iswlower(), iswprint(),	 iswpunct(),  iswspace(),  iswupper(),
       and iswxdigit() functions are Standard.

SEE ALSO
       localedef(1),  setlocale(3C), stdio(3C), ascii(5), attributes(5), stan‐
       dards(5)

				 Apr 19, 2004			  ISWALPHA(3C)
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