1 //===-- UuidCompatibility.h -------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // Include this header if your system does not have a definition of uuid_t
10 
11 #ifndef utility_UUID_COMPATIBILITY_H
12 #define utility_UUID_COMPATIBILITY_H
13 
14 // uuid_t is guaranteed to always be a 16-byte array
15 typedef unsigned char uuid_t[16];
16 
17 // Return 1 if uuid is null, that is, all zeroes.
18 inline __attribute__((always_inline)) int uuid_is_null(uuid_t uuid) {
19   for (int i = 0; i < 16; i++)
20     if (uuid[i])
21       return 0;
22   return 1;
23 }
24 
25 #endif // utility_UUID_COMPATIBILITY_H
26