| // Copyright 2021 The Abseil Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "absl/strings/internal/cord_rep_crc.h" |
| |
| #include <cassert> |
| #include <cstdint> |
| |
| #include "absl/base/config.h" |
| #include "absl/strings/internal/cord_internal.h" |
| |
| namespace absl { |
| ABSL_NAMESPACE_BEGIN |
| namespace cord_internal { |
| |
| CordRepCrc* CordRepCrc::New(CordRep* child, uint32_t crc) { |
| assert(child != nullptr); |
| if (child->IsCrc()) { |
| if (child->refcount.IsOne()) { |
| child->crc()->crc = crc; |
| return child->crc(); |
| } |
| CordRep* old = child; |
| child = old->crc()->child; |
| CordRep::Ref(child); |
| CordRep::Unref(old); |
| } |
| auto* new_cordrep = new CordRepCrc; |
| new_cordrep->length = child->length; |
| new_cordrep->tag = cord_internal::CRC; |
| new_cordrep->child = child; |
| new_cordrep->crc = crc; |
| return new_cordrep; |
| } |
| |
| void CordRepCrc::Destroy(CordRepCrc* node) { |
| CordRep::Unref(node->child); |
| delete node; |
| } |
| |
| } // namespace cord_internal |
| ABSL_NAMESPACE_END |
| } // namespace absl |