function

iswctype

int iswctype(wint_t c, wctype_t desc);

Check if wide character has property

Checks whether c has the property specified by desc.

A specific locale can accept multiple categories in which to classify its characters. At least the following categories are recognized by all locales:

string passed to wctype	description	equivalent function
`"alnum"`	alphanumerical character	iswalnum
`"alpha"`	letter character	iswalpha
`"blank"`	blank character	iswblank
`"cntrl"`	control character	iswcntrl
`"digit"`	decimal digit character	iswdigit
`"graph"`	character with graphical representation	iswgraph
`"lower"`	lowercase letter character	iswlower
`"print"`	printable character	iswprint
`"punct"`	punctuation character	iswpunct
`"space"`	white-space character	iswspace
`"upper"`	uppercase letter character	iswupper
`"xdigit"`	hexadecimal digit character	iswxdigit

The setting of the LC_CTYPE locale category at the time of calling the function shall be the same as when wctype was called to obtain desc.

Parameters

c: Wide character to be checked, casted to a wint_t, or WEOF.
wint_t is an integral type.
desc: A value returned by a call to wctype (with the same LC_CTYPE locale category selected as in this call).
wctype_t is the scalar type used as return type for wctype.

Return Value

A value different from zero (i.e., true) if indeed c is has the property identified by desc. Zero (i.e., false) otherwise.

Example

/* iswctype example */
#include <stdio.h>
#include <wctype.h>
int main ()
{
  int i=0;
  wchar_t str[] = L"Test String.\n";
  wchar_t c;
  wctype_t check = wctype("lower");
  wctrans_t trans = wctrans("toupper");
  while (str[i])
  {
    c = str[i];
    if (iswctype(c,check)) c = towctrans(c,trans);
    putwchar (c);
    i++;
  }
  return 0;
}