mirror of https://gitee.com/bigwinds/arangodb
104 lines
2.6 KiB
C++
104 lines
2.6 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Library to build up VPack documents.
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///
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/// DISCLAIMER
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///
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/// Copyright 2015 ArangoDB GmbH, Cologne, Germany
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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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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Max Neunhoeffer
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/// @author Jan Steemann
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/// @author Copyright 2015, ArangoDB GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include <iostream>
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#include "velocypack/StringRef.h"
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#include "velocypack/Slice.h"
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using namespace arangodb::velocypack;
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namespace {
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void* memrchrSwitch(void const* block, int c, size_t size) {
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#ifdef __linux__
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return const_cast<void*>(memrchr(block, c, size));
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#else
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/// naive memrchr overlay for Windows or other platforms, which don't implement it
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if (size) {
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unsigned char const* p = static_cast<unsigned char const*>(block);
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for (p += size - 1; size; p--, size--) {
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if (*p == c) {
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return const_cast<void*>(static_cast<void const*>(p));
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}
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}
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}
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return nullptr;
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#endif
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}
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} // namespace
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StringRef::StringRef(Slice slice) {
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VELOCYPACK_ASSERT(slice.isString());
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ValueLength l;
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_data = slice.getString(l);
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_length = l;
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}
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/// @brief create a StringRef from a VPack slice of type String
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StringRef& StringRef::operator=(Slice slice) {
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VELOCYPACK_ASSERT(slice.isString());
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ValueLength l;
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_data = slice.getString(l);
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_length = l;
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return *this;
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}
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size_t StringRef::find(char c) const {
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char const* p =
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static_cast<char const*>(memchr(static_cast<void const*>(_data), c, _length));
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if (p == nullptr) {
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return std::string::npos;
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}
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return (p - _data);
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}
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size_t StringRef::rfind(char c) const {
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char const* p =
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static_cast<char const*>(::memrchrSwitch(static_cast<void const*>(_data), c, _length));
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if (p == nullptr) {
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return std::string::npos;
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}
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return (p - _data);
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}
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namespace arangodb {
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namespace velocypack {
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std::ostream& operator<<(std::ostream& stream, StringRef const& ref) {
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stream.write(ref.data(), ref.length());
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return stream;
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}
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}
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}
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