iswctype

int iswctype( wint_t wc, wctype_t desc );

Classifies the wide character wc using the current C locale's LC_CTYPE category identified by desc.

Parameters

Return value

Non-zero if the character wc has the property identified by desc in LC_CTYPE facet of the current C locale, zero otherwise.

Example

#include <locale.h>
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
 
const char* classify(wchar_t wc, const char* cat)
{
    return iswctype(wc, wctype(cat)) ? "true" : "false";
}
 
int main(void)
{
    setlocale(LC_ALL, "ja_JP.UTF-8");
    puts("The character \u6c34 is...");
    const char* cats[] = {"digit", "alpha", "space", "cntrl", "jkanji"};
    for (int n = 0; n < 5; ++n)
        printf("%s?\t%s\n", cats[n], classify(L'\u6c34', cats[n]));
}

The character 水 is...
digit?  false
alpha?  true
space?  false
cntrl?  false
jkanji? true

References

• C23 standard (ISO/IEC 9899:2023):
• 7.30.2.2.1 The iswctype function (p: TBD)
• C17 standard (ISO/IEC 9899:2018):
• 7.30.2.2.1 The iswctype function (p: TBD)
• C11 standard (ISO/IEC 9899:2011):
• 7.30.2.2.1 The iswctype function (p: 451-452)
• C99 standard (ISO/IEC 9899:1999):
• 7.25.2.2.1 The iswctype function (p: 397-398)

See also