Function findLastByteFromAPI

javascript/lib.c:689–724

}

napi_value findLastByteFromAPI(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 allowed bytes (zero-copy)
    void *allowed_data;
    size_t allowed_length;
    status = napi_get_buffer_info(env, args[1], &allowed_data, &allowed_length);
    if (status != napi_ok) {
        napi_throw_error(env, NULL, "Second argument must be a Buffer");
        return NULL;
    }

    // Find last byte that is in the allowed set using sz_rfind_byteset
    sz_byteset_t byteset;
    sz_byteset_init(&byteset);
    for (size_t i = 0; i < allowed_length; i++) { sz_byteset_add_u8(&byteset, ((sz_u8_t *)allowed_data)[i]); }
    sz_cptr_t result = sz_rfind_byteset((sz_cptr_t)haystack_data, haystack_length, &byteset);

    // Convert the result to JavaScript BigInt and return
    napi_value js_result;
    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 equalAPI(napi_env env, napi_callback_info info) {
    size_t argc = 2;