1 // Copyright 2021 The Abseil Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "absl/strings/internal/cord_rep_crc.h" 16 17 #include <cassert> 18 #include <cstdint> 19 #include <utility> 20 21 #include "absl/base/config.h" 22 #include "absl/strings/internal/cord_internal.h" 23 24 namespace absl { 25 ABSL_NAMESPACE_BEGIN 26 namespace cord_internal { 27 New(CordRep * child,crc_internal::CrcCordState state)28CordRepCrc* CordRepCrc::New(CordRep* child, crc_internal::CrcCordState state) { 29 if (child != nullptr && child->IsCrc()) { 30 if (child->refcount.IsOne()) { 31 child->crc()->crc_cord_state = std::move(state); 32 return child->crc(); 33 } 34 CordRep* old = child; 35 child = old->crc()->child; 36 CordRep::Ref(child); 37 CordRep::Unref(old); 38 } 39 auto* new_cordrep = new CordRepCrc; 40 new_cordrep->length = child != nullptr ? child->length : 0; 41 new_cordrep->tag = cord_internal::CRC; 42 new_cordrep->child = child; 43 new_cordrep->crc_cord_state = std::move(state); 44 return new_cordrep; 45 } 46 Destroy(CordRepCrc * node)47void CordRepCrc::Destroy(CordRepCrc* node) { 48 if (node->child != nullptr) { 49 CordRep::Unref(node->child); 50 } 51 delete node; 52 } 53 54 } // namespace cord_internal 55 ABSL_NAMESPACE_END 56 } // namespace absl 57