WCWIDTH(3) Library Functions Manual WCWIDTH(3)

wcwidth — number of column positions of a wide-character code

#include <wchar.h>

int wcwidth(wchar_t wc);

The wcwidth() function determines the number of column positions required for the wide character wc . The value of wc must be a character representable as a wchar_t , and must be a wide-character code corresponding to a valid character in the current locale.

The wcwidth() function either returns 0 (if wc is a null wide-character code), or returns the number of column positions to be occupied by the wide-character code wc , or returns -1 (if wc does not correspond to a printing wide-character code).

No errors are defined.

None.

This function was removed from the final ISO C Amendment 1, and the return value for a non-printable wide character is not specified.

None.

wcswidth(3) , <wchar.h> .

Derived from MSE working draft.

February 1997 posix.fail