Tcl_ExternalToUtfDString

tk_sys

Function Tcl_ExternalToUtfDString 

Source 
pub unsafe extern "C" fn Tcl_ExternalToUtfDString(
    encoding: Tcl_Encoding,
    src: *const c_char,
    srcLen: c_int,
    dsPtr: *mut Tcl_DString,
) -> *mut c_char