ISWALPHA(3C) Standard C Library Functions ISWALPHA(3C)

NAME

iswalpha, isenglish, isideogram, iswideogram, isnumber, iswnumber,
isphonogram, iswphonogram, isspecial, iswspecial, iswalnum, iswascii,
iswblank, iswcntrl, iswdigit, iswgraph, iswlower, iswprint, iswpunct,
iswspace, iswupper, iswxdigit, iswhexnumber, iswalpha_l,
iswideogram_l, iswnumber_l, iswphonogram_l, iswspecial_l, iswalnum_l,
iswascii_l, iswblank_l, iswcntrl_l, iswdigit_l, iswgraph_l,
iswlower_l, iswprint_l, iswpunct_l, iswspace_l, iswupper_l,
iswhexnumber_l - 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);

int iswhexnumber(wint_t wc);

int iswideogram(wint_t wc);

int iswnumber(wint_t wc);

int iswphonogram(wint_t wc);

int iswspecial(wint_t wc);

int iswalpha_l(wint_t wc, locale_t loc);

int iswideogram_l(wint_t wc, locale_t loc);

int iswnumber_l(wint_t wc, locale_t loc);

int iswphonogram_l(wint_t wc, locale_t loc);

int iswspecial_l(wint_t wc, locale_t loc);

int iswalnum_l(wint_t wc, locale_t loc);

int iswascii_l(wint_t wc, locale_t loc);

int iswblank_l(wint_t wc, locale_t loc);

int iswcntrl_l(wint_t wc, locale_t loc);

int iswdigit_l(wint_t wc, locale_t loc);

int iswgraph_l(wint_t wc, locale_t loc);

int iswlower_l(wint_t wc, locale_t loc);

int iswprint_l(wint_t wc, locale_t loc);

int iswpunct_l(wint_t wc, locale_t loc);

int iswspace_l(wint_t wc, locale_t loc);

int iswupper(wint_t wc, locale_t loc);

int iswxdigit(wint_t wc, locale_t loc);

#include <xlocale.h>

int iswhexnumber(wint_t wc, locale_t loc);

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 or the locale specified by loc.

The functions iswalpha_l(), iswideogram_l(), iswnumber_l(),
iswphonogram_l(), iswspecial_l(), iswalnum_l(), iswascii_l(),
iswblank_l(), iswcntrl_l(), iswdigit_l(), iswgraph_l(), iswlower_l(),
iswprint_l(), iswpunct_l(), iswspace_l(), iswupper_l(), all behave
identically to their counterparts without the '_l' suffix, but
instead of operating on the current locale, they operate on the
locale specified by loc.

The functions, iswideogram(), iswnumber(), iswphonogram(),
iswspecial(), and iswhexnumber(), are respectively identical to
isideogram(), isnumber(), isphonogram(), isspecial(), iswxdigit()
respectively. They are provided for compatibility purposes.

In all cases, wc is a wint_t, the value of which must be a wide-
character 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
representing a character of class "alpha" in the
program's current locale.


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


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


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


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


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


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


iswascii(wc)
Tests whether wc is a wide-character code
representing an ASCII character.


iswblank(wc)
Tests whether wc is a wide-character code
representing 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(7).


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


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


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


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


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


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


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


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


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

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|CSI | Enabled |
+--------------------+-----------------+
|Interface Stability | See below. |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

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

The iswalpha_l(), iswalnum_l(), iswblank_l(), iswcntrl_l(),
iswdigit_l(), iswgraph_l(), iswlower_l(), iswprint_l(), iswpunct_l(),
iswspace_l(), and iswupper_l() functions are Standard.

SEE ALSO

localedef(1), newlocale(3C), setlocale(3C), stdio(3C), uselocale(3C),
ascii(7), attributes(7), standards(7)

April 9, 2016 ISWALPHA(3C)