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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// 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 <google/protobuf/generated_enum_util.h>
#include <algorithm>
#include <google/protobuf/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