wcwidth(3)                                                   wcwidth(3)

  wcwidth()

  NAME

    wcwidth() - number of column positions of a wide-character code

  SYNOPSIS

    #include 

    int wcwidth(wchar_t wc)

  DESCRIPTION

    The wcwidth(3) 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 arguments are:

    wc
        A wide-character code for which the width is to be determined.

  RETURN VALUES

    If the wcwidth(3) call is successful it 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. It returns -1 if wc does not correspond to
    a printing wide-character code.

  ERRORS

    No errors are defined.

  SEE ALSO

    wcswidth(3)

  USAGE NOTES

    The wcwidth function is thread safe.

    The wcwidth function is not async-signal safe.