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-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(5).

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(5) for descriptions of the following attributes:

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

See Also

localedef(1), setlocale(3C), stdio(3C), ascii(5), attributes(5), standards(5)