1 files changed, 56 insertions, 0 deletions
diff --git a/abseil-cpp/absl/strings/internal/cord_rep_crc.cc b/abseil-cpp/absl/strings/internal/cord_rep_crc.cc
new file mode 100644
index 0000000..dbe54cc
--- /dev/null
+++ b/abseil-cpp/absl/strings/internal/cord_rep_crc.cc
@@ -0,0 +1,56 @@
+// 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 <utility>
+
+#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, crc_internal::CrcCordState state) {
+  if (child != nullptr && child->IsCrc()) {
+    if (child->refcount.IsOne()) {
+      child->crc()->crc_cord_state = std::move(state);
+      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 != nullptr ? child->length : 0;
+  new_cordrep->tag = cord_internal::CRC;
+  new_cordrep->child = child;
+  new_cordrep->crc_cord_state = std::move(state);
+  return new_cordrep;
+}
+
+void CordRepCrc::Destroy(CordRepCrc* node) {
+  if (node->child != nullptr) {
+    CordRep::Unref(node->child);
+  }
+  delete node;
+}
+
+}  // namespace cord_internal
+ABSL_NAMESPACE_END
+}  // namespace absl