#include <errno.h>
#include <stdlib.h>

#include "rtti.h"

char* toString(var v, ...)
{
    meta_obj_t*    obj    = NULL;
    to_string_fn_t method = NULL;
    va_list        ap;
    char*          s = NULL;

    obj = RTTI_DATA_TO_OBJ(v);
    if (RTTI_OBJ_INVALID(obj)) {
        errno = EINVAL;
        return NULL;
    }

    RTTI_GET_METHOD(method, obj, toString, toString);
    if (method == NULL) {
        errno = EINVAL;
        return NULL;
    }

    va_start(ap, v);
    s = method(obj, ap);
    va_end(ap);

    return s;
}