Format
#include <wctype.h>
int iswctype(wint_t wc, wctype_t wc_prop);Language Level: ANSI
Threadsafe: Yes.
Locale Sensitive: The behavior of this function might be affected by the LC_CTYPE category of the current locale if LOCALETYPE(*LOCALE) is specified on the compilation command. The behavior of this function might be affected by the LC_UNI_CTYPE category of the current locale if either the LOCALETYPE(*LOCALEUCS2) option or the LOCALETYPE(*LOCALEUTF) option is specified on the compilation command. This function is not available when LOCALETYPE(*CLD) is specified on the compilation command. For more information, see Understanding CCSIDs and Locales.
Wide Character Function: See Wide Characters for more information.
Description
The iswctype() function determines whether the wide character wc has the property wc_prop. If the value of wc is neither WEOF nor any value of the wide characters that corresponds to a multibyte character, the behavior is undefined. If the value of wc_prop is incorrect (that is, it is not obtained by a previous call to the wctype() function, or wc_prop has been invalidated by a subsequent call to the setlocale() function), the behavior is undefined.
Return Value
The iswctype() function returns true if the value of the wide character wc has the property wc_prop.
The following strings, alnum through to xdigit are reserved for the standard character classes. The functions are shown as follows with their equivalent isw*() function:
iswctype(wc, wctype("alnum")); /* is equivalent to */ iswalnum(wc);
iswctype(wc, wctype("alpha")); /* is equivalent to */ iswalpha(wc);
iswctype(wc, wctype("cntrl")); /* is equivalent to */ iswcntrl(wc);
iswctype(wc, wctype("digit")); /* is equivalent to */ iswdigit(wc);
iswctype(wc, wctype("graph")); /* is equivalent to */ iswgraph(wc);
iswctype(wc, wctype("lower")); /* is equivalent to */ iswlower(wc);
iswctype(wc, wctype("print")); /* is equivalent to */ iswprint(wc);
iswctype(wc, wctype("punct")); /* is equivalent to */ iswpunct(wc);
iswctype(wc,wctype("space")); /* is equivalent to */ iswspace(wc);
iswctype(wc, wctype("upper")); /* is equivalent to */ iswupper(wc);
iswctype(wc, wctype("xdigit")); /* is equivalent to */ iswxdigit(wc);Example that uses iswctype()
#include <stdio.h>
#include <wctype.h>
int main(void)
{
int wc;
for (wc=0; wc <= 0xFF; wc++) {
printf("%3d", wc);
printf(" %#4x ", wc);
printf("%3s", iswctype(wc, wctype("alnum")) ? "AN" : " ");
printf("%2s", iswctype(wc, wctype("alpha")) ? "A" : " ");
printf("%2s", iswctype(wc, wctype("cntrl")) ? "C" : " ");
printf("%2s", iswctype(wc, wctype("digit")) ? "D" : " ");
printf("%2s", iswctype(wc, wctype("graph")) ? "G" : " ");
printf("%2s", iswctype(wc, wctype("lower")) ? "L" : " ");
printf(" %c", iswctype(wc, wctype("print")) ? wc : ' ');
printf("%3s", iswctype(wc, wctype("punct")) ? "PU" : " ");
printf("%2s", iswctype(wc, wctype("space")) ? "S" : " ");
printf("%3s", iswctype(wc, wctype("print")) ? "PR" : " ");
printf("%2s", iswctype(wc, wctype("upper")) ? "U" : " ");
printf("%2s", iswctype(wc, wctype("xdigit")) ? "X" : " ");
putchar('\n');
}
}Related Information