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
20extern "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__)
31extern "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
47extern "C" {
48void bzero(void* s, size_t n) {
49 memset(s, 0, n);
50}
51
52int strcasecmp(const char* a, const char* b) {
53 return _stricmp(a, b);
54}
55
56int strncasecmp(const char* a, const char* b, size_t c) {
57 return _strnicmp(a, b, c);
58}
59
60char* strtok_r(char* str, char const* delim, char** ctx) {
61 return strtok_s(str, delim, ctx);
62}
63}
64#endif
65