each_byte

/*
 * call-seq:
 *   strio.each_byte {|byte| block }  -> strio
 *
 * See IO#each_byte.
 */
static VALUE
strio_each_byte(self)
    VALUE self;
{
    struct StringIO *ptr = readable(StringIO(self));

    RETURN_ENUMERATOR(self, 0, 0);

    while (ptr->pos < RSTRING_LEN(ptr->string)) {
        char c = RSTRING_PTR(ptr->string)[ptr->pos++];
        rb_yield(CHR2FIX(c));
    }
    return self;
}