mirror of https://gitee.com/bigwinds/arangodb
114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS 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 Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#include "ManagedDocumentResult.h"
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#include "Aql/AqlValue.h"
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#include <velocypack/Builder.h>
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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using namespace arangodb;
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using namespace arangodb::aql;
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void ManagedDocumentResult::clone(ManagedDocumentResult& cloned) const {
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cloned.reset();
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if (_useString) {
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cloned._useString = true;
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cloned._string = _string;
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cloned._lastRevisionId = _lastRevisionId;
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cloned._vpack = reinterpret_cast<uint8_t*>(const_cast<char*>(cloned._string.data()));
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} else if (_managed) {
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cloned.setManaged(_vpack, _lastRevisionId);
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} else {
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cloned.setUnmanaged(_vpack, _lastRevisionId);
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}
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}
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//add unmanaged vpack
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void ManagedDocumentResult::setUnmanaged(uint8_t const* vpack, TRI_voc_rid_t revisionId) {
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if(_managed || _useString) {
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reset();
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}
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TRI_ASSERT(_length == 0);
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_vpack = const_cast<uint8_t*>(vpack);
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_lastRevisionId = revisionId;
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}
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void ManagedDocumentResult::setManaged(uint8_t const* vpack, TRI_voc_rid_t revisionId) {
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VPackSlice slice(vpack);
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auto newLen = slice.byteSize();
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if (_length >= newLen && _managed){
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std::memcpy(_vpack, vpack, newLen);
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} else {
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reset();
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_vpack = new uint8_t[newLen];
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std::memcpy(_vpack, vpack, newLen);
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_length=newLen;
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}
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_lastRevisionId = revisionId;
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_managed = true;
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}
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void ManagedDocumentResult::setManagedAfterStringUsage(TRI_voc_rid_t revisionId) {
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TRI_ASSERT(!_string.empty());
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TRI_ASSERT(_useString);
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_vpack = reinterpret_cast<uint8_t*>(const_cast<char*>(_string.data()));
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_lastRevisionId = revisionId;
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_useString = true;
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}
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void ManagedDocumentResult::setManaged(std::string&& str, TRI_voc_rid_t revisionId) {
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reset();
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_string = std::move(str);
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_vpack = reinterpret_cast<uint8_t*>(const_cast<char*>(_string.data()));
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_lastRevisionId = revisionId;
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_useString = true;
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}
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void ManagedDocumentResult::reset() noexcept {
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if (_managed) {
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delete[] _vpack;
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}
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_managed = false;
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_length = 0;
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if (_useString) {
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_string.clear();
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_useString = false;
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}
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_lastRevisionId = 0;
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_vpack = nullptr;
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}
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void ManagedDocumentResult::addToBuilder(velocypack::Builder& builder, bool allowExternals) const {
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TRI_ASSERT(!empty());
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if (allowExternals && canUseInExternal()) {
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builder.add(velocypack::Slice(_vpack));
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} else {
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builder.add(velocypack::Slice(_vpack));
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}
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}
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