Function findLastAPI

javascript/lib.c:543–578

}

napi_value findLastAPI(napi_env env, napi_callback_info info) {
    size_t argc = 2;
    napi_value args[2];
    napi_get_cb_info(env, info, &argc, args, NULL, NULL);

    // Get buffer info for haystack (zero-copy)
    void *haystack_data;
    size_t haystack_length;
    napi_status status = napi_get_buffer_info(env, args[0], &haystack_data, &haystack_length);
    if (status != napi_ok) {
        napi_throw_error(env, NULL, "First argument must be a Buffer");
        return NULL;
    }

    // Get buffer info for needle (zero-copy)
    void *needle_data;
    size_t needle_length;
    status = napi_get_buffer_info(env, args[1], &needle_data, &needle_length);
    if (status != napi_ok) {
        napi_throw_error(env, NULL, "Second argument must be a Buffer");
        return NULL;
    }

    // Convert the result to JavaScript BigInt and return
    napi_value js_result;
    if (needle_length == 0) { napi_create_bigint_int64(env, haystack_length, &js_result); }
    else {
        sz_cptr_t result = sz_rfind((sz_cptr_t)haystack_data, haystack_length, (sz_cptr_t)needle_data, needle_length);

        // In JavaScript, if `lastIndexOf` is unable to find the specified value, then it should return -1
        if (result == NULL) { napi_create_bigint_int64(env, -1, &js_result); }
        else { napi_create_bigint_uint64(env, result - (sz_cptr_t)haystack_data, &js_result); }
    }

    return js_result;
}

napi_value findByteAPI(napi_env env, napi_callback_info info) {
    size_t argc = 2;