65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <folly/portability/String.h>
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#if !FOLLY_HAVE_MEMRCHR
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extern "C" void* memrchr(const void* s, int c, size_t n) {
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for (auto p = ((const char*)s) + n - 1; p >= (const char*)s; p--) {
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if (*p == (char)c) {
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return (void*)p;
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}
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}
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return nullptr;
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}
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#endif
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#if defined(_WIN32) || defined(__FreeBSD__)
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extern "C" char* strndup(const char* a, size_t len) {
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auto neededLen = strlen(a);
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if (neededLen > len) {
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neededLen = len;
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}
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char* buf = (char*)malloc((neededLen + 1) * sizeof(char));
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if (!buf) {
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return nullptr;
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}
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memcpy(buf, a, neededLen);
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buf[neededLen] = '\0';
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return buf;
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}
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#endif
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#ifdef _WIN32
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extern "C" {
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void bzero(void* s, size_t n) {
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memset(s, 0, n);
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}
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int strcasecmp(const char* a, const char* b) {
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return _stricmp(a, b);
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}
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int strncasecmp(const char* a, const char* b, size_t c) {
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return _strnicmp(a, b, c);
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}
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char* strtok_r(char* str, char const* delim, char** ctx) {
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return strtok_s(str, delim, ctx);
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}
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}
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#endif
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