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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <generated_enum_util.h>
+
+#include <algorithm>
+
+#include <generated_message_util.h>
+
+namespace google {
+namespace protobuf {
+namespace internal {
+namespace {
+
+bool EnumCompareByName(const EnumEntry& a, const EnumEntry& b) {
+ return StringPiece(a.name) < StringPiece(b.name);
+}
+
+// Gets the numeric value of the EnumEntry at the given index, but returns a
+// special value for the index -1. This gives a way to use std::lower_bound on a
+// sorted array of indices while searching for value that we associate with -1.
+int GetValue(const EnumEntry* enums, int i, int target) {
+ if (i == -1) {
+ return target;
+ } else {
+ return enums[i].value;
+ }
+}
+
+} // namespace
+
+bool LookUpEnumValue(const EnumEntry* enums, size_t size,
+ StringPiece name, int* value) {
+ EnumEntry target{name, 0};
+ auto it = std::lower_bound(enums, enums + size, target, EnumCompareByName);
+ if (it != enums + size && it->name == name) {
+ *value = it->value;
+ return true;
+ }
+ return false;
+}
+
+int LookUpEnumName(const EnumEntry* enums, const int* sorted_indices,
+ size_t size, int value) {
+ auto comparator = [enums, value](int a, int b) {
+ return GetValue(enums, a, value) < GetValue(enums, b, value);
+ };
+ auto it =
+ std::lower_bound(sorted_indices, sorted_indices + size, -1, comparator);
+ if (it != sorted_indices + size && enums[*it].value == value) {
+ return it - sorted_indices;
+ }
+ return -1;
+}
+
+bool InitializeEnumStrings(
+ const EnumEntry* enums, const int* sorted_indices, size_t size,
+ internal::ExplicitlyConstructed<std::string>* enum_strings) {
+ for (size_t i = 0; i < size; ++i) {
+ enum_strings[i].Construct(enums[sorted_indices[i]].name);
+ internal::OnShutdownDestroyString(enum_strings[i].get_mutable());
+ }
+ return true;
+}
+
+} // namespace internal
+} // namespace protobuf
+} // namespace google