Add StringKeyed(Unordered){Set,Map} to folly

[folly.git] / folly / experimental / StringKeyedCommon.h

diff --git a/folly/experimental/StringKeyedCommon.h b/folly/experimental/StringKeyedCommon.h
new file mode 100644 (file)
index 0000000..a086210
--- /dev/null
+++ b/folly/experimental/StringKeyedCommon.h
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+/*
+ * Copyright 2015 Facebook, Inc.
+ *
+ * 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
+ *
+ *   http://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.
+ */
+// Copyright 2013-present Facebook. All Rights Reserved.
+// @author: Pavlo Kushnir (pavlo)
+
+#ifndef FOLLY_EXPERIMENTAL_STRINGKEYEDCOMMON_H_
+#define FOLLY_EXPERIMENTAL_STRINGKEYEDCOMMON_H_
+
+#include <memory>
+#include <folly/Range.h>
+
+namespace folly {
+
+template <class Alloc>
+StringPiece stringPieceDup(StringPiece piece, const Alloc& alloc) {
+  auto size = piece.size();
+  auto keyDup = typename Alloc::template rebind<char>::other(alloc)
+    .allocate(size);
+  memcpy(keyDup, piece.data(), size * sizeof(typename StringPiece::value_type));
+  return StringPiece(keyDup, size);
+}
+
+template <class Alloc>
+void stringPieceDel(StringPiece piece, const Alloc& alloc) {
+  typename Alloc::template rebind<char>::other(alloc)
+    .deallocate(const_cast<char*>(piece.data()), piece.size());
+}
+
+} // folly
+
+#endif /* FOLLY_EXPERIMENTAL_STRINGKEYEDCOMMON_H_ */