1 | /* |
2 | * Copyright 2016-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 | #include <folly/portability/String.h> |
18 | |
19 | #if !FOLLY_HAVE_MEMRCHR |
20 | extern "C" void* memrchr(const void* s, int c, size_t n) { |
21 | for (auto p = ((const char*)s) + n - 1; p >= (const char*)s; p--) { |
22 | if (*p == (char)c) { |
23 | return (void*)p; |
24 | } |
25 | } |
26 | return nullptr; |
27 | } |
28 | #endif |
29 | |
30 | #if defined(_WIN32) || defined(__FreeBSD__) |
31 | extern "C" char* strndup(const char* a, size_t len) { |
32 | auto neededLen = strlen(a); |
33 | if (neededLen > len) { |
34 | neededLen = len; |
35 | } |
36 | char* buf = (char*)malloc((neededLen + 1) * sizeof(char)); |
37 | if (!buf) { |
38 | return nullptr; |
39 | } |
40 | memcpy(buf, a, neededLen); |
41 | buf[neededLen] = '\0'; |
42 | return buf; |
43 | } |
44 | #endif |
45 | |
46 | #ifdef _WIN32 |
47 | extern "C" { |
48 | void bzero(void* s, size_t n) { |
49 | memset(s, 0, n); |
50 | } |
51 | |
52 | int strcasecmp(const char* a, const char* b) { |
53 | return _stricmp(a, b); |
54 | } |
55 | |
56 | int strncasecmp(const char* a, const char* b, size_t c) { |
57 | return _strnicmp(a, b, c); |
58 | } |
59 | |
60 | char* strtok_r(char* str, char const* delim, char** ctx) { |
61 | return strtok_s(str, delim, ctx); |
62 | } |
63 | } |
64 | #endif |
65 | |