towupper(3)                                                 towupper(3)

  towupper()

  NAME

    towupper(), _towupper() - lower case to upper case wide-character code
    conversion

  SYNOPSIS

    #include 

    wint_t towupper (wint_t wc)
    wint_t _towupper (wint_t wc)

  DESCRIPTION

    The towupper(3) function converts a lower-case wide-character code to the
    corresponding upper-case wide-character code. If c is not a lower-case
    wide-character code, it is not converted.

    The _towupper(3) function does the same, but the argument c must be a
    lower-case wide-character code. This routine is faster but will break with
    the wrong input.

  RETURN VALUES

    If the argument is a lower-case wide-character code, the towupper(3)
    function returns the corresponding upper-case wide-character code if there
    is one; otherwise the argument is returned unchanged.

  SEE ALSO

    iswalnum(3)

    iswalpha(3)

    iswblank(3)

    iswcntrl(3)

    iswdigit(3)

    iswgraph(3)

    iswlower(3)

    iswprint(3)

    iswpunct(3)

    iswspace(3)

    iswupper(3)

    iswxdigit(3)

    towlower(3)

  USAGE NOTES

    All these functions are thread safe.

    The towupper function is not async-signal safe.