Tcl_UtfToUniCharDString

tk_sys

Function Tcl_UtfToUniCharDString 

Source 
pub unsafe extern "C" fn Tcl_UtfToUniCharDString(
    src: *const c_char,
    length: c_int,
    dsPtr: *mut Tcl_DString,
) -> *mut Tcl_UniChar