1 | /* |
2 | * Copyright 2014-present Facebook, Inc. |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | */ |
16 | |
17 | #pragma once |
18 | |
19 | #include <sys/types.h> |
20 | |
21 | #include <string> |
22 | |
23 | #include <folly/portability/Sockets.h> |
24 | |
25 | namespace folly { |
26 | namespace detail { |
27 | |
28 | std::string familyNameStrDefault(sa_family_t family); |
29 | |
30 | inline std::string familyNameStr(sa_family_t family) { |
31 | switch (family) { |
32 | case AF_INET: |
33 | return "AF_INET" ; |
34 | case AF_INET6: |
35 | return "AF_INET6" ; |
36 | case AF_UNSPEC: |
37 | return "AF_UNSPEC" ; |
38 | case AF_UNIX: |
39 | return "AF_UNIX" ; |
40 | default: |
41 | return familyNameStrDefault(family); |
42 | } |
43 | } |
44 | |
45 | [[noreturn]] void getNthMSBitImplThrow(size_t bitCount, sa_family_t family); |
46 | |
47 | template <typename IPAddrType> |
48 | inline bool |
49 | getNthMSBitImpl(const IPAddrType& ip, size_t bitIndex, sa_family_t family) { |
50 | if (bitIndex >= ip.bitCount()) { |
51 | getNthMSBitImplThrow(ip.bitCount(), family); |
52 | } |
53 | // Underlying bytes are in n/w byte order |
54 | return (ip.getNthMSByte(bitIndex / 8) & (0x80 >> (bitIndex % 8))) != 0; |
55 | } |
56 | } // namespace detail |
57 | } // namespace folly |
58 | |