/*
 *  call-seq:
 *     token.cmp(other_token) -> bool
 *
 *  Used to compare two tokens. Token is extended by Comparable so you can
 *  also use +<+, +>+, +<=+, +>=+ etc. to compare tokens.
 *  
 *  Tokens are sorted by the position in the text at which they occur, ie
 *  the start offset. If two tokens have the same start offset, (see
 *  pos_inc=) then, they are sorted by the end offset and then
 *  lexically by the token text.
 */
static VALUE
frt_token_cmp(VALUE self, VALUE rother)
{
    RToken *token, *other;
    int cmp;
    GET_TK(token, self);
    GET_TK(other, rother);
    if (token->start > other->start) {
        cmp = 1;
    } else if (token->start < other->start) {
        cmp = -1;
    } else {
        if (token->end > other->end) {
            cmp = 1;
        } else if (token->end < other->end) {
            cmp = -1;
        } else {
            cmp = strcmp(rs2s(token->text), rs2s(other->text));
        }
    }
    return INT2FIX(cmp);
}