diff options
Diffstat (limited to 'absl/strings/internal/cord_rep_crc.cc')
-rw-r--r-- | absl/strings/internal/cord_rep_crc.cc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/absl/strings/internal/cord_rep_crc.cc b/absl/strings/internal/cord_rep_crc.cc new file mode 100644 index 00000000..ee140354 --- /dev/null +++ b/absl/strings/internal/cord_rep_crc.cc @@ -0,0 +1,54 @@ +// 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 |