diff options
Diffstat (limited to 'toolkit/components/protobuf/src/google/protobuf/repeated_ptr_field.cc')
-rw-r--r-- | toolkit/components/protobuf/src/google/protobuf/repeated_ptr_field.cc | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/toolkit/components/protobuf/src/google/protobuf/repeated_ptr_field.cc b/toolkit/components/protobuf/src/google/protobuf/repeated_ptr_field.cc new file mode 100644 index 0000000000..8e86727144 --- /dev/null +++ b/toolkit/components/protobuf/src/google/protobuf/repeated_ptr_field.cc @@ -0,0 +1,152 @@ +// 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. + +// Author: kenton@google.com (Kenton Varda) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. + +#include <algorithm> + +#include <google/protobuf/stubs/logging.h> +#include <google/protobuf/stubs/common.h> +#include <google/protobuf/implicit_weak_message.h> +#include <google/protobuf/repeated_field.h> +#include <google/protobuf/port.h> + +// Must be included last. +#include <google/protobuf/port_def.inc> + +namespace google { +namespace protobuf { + +namespace internal { + +void** RepeatedPtrFieldBase::InternalExtend(int extend_amount) { + int new_size = current_size_ + extend_amount; + if (total_size_ >= new_size) { + // N.B.: rep_ is non-nullptr because extend_amount is always > 0, hence + // total_size must be non-zero since it is lower-bounded by new_size. + return &rep_->elements[current_size_]; + } + Rep* old_rep = rep_; + Arena* arena = GetOwningArena(); + new_size = internal::CalculateReserveSize<void*, kRepHeaderSize>(total_size_, + new_size); + GOOGLE_CHECK_LE(static_cast<int64_t>(new_size), + static_cast<int64_t>( + (std::numeric_limits<size_t>::max() - kRepHeaderSize) / + sizeof(old_rep->elements[0]))) + << "Requested size is too large to fit into size_t."; + size_t bytes = kRepHeaderSize + sizeof(old_rep->elements[0]) * new_size; + if (arena == nullptr) { + rep_ = reinterpret_cast<Rep*>(::operator new(bytes)); + } else { + rep_ = reinterpret_cast<Rep*>(Arena::CreateArray<char>(arena, bytes)); + } + const int old_total_size = total_size_; + total_size_ = new_size; + if (old_rep) { + if (old_rep->allocated_size > 0) { + memcpy(rep_->elements, old_rep->elements, + old_rep->allocated_size * sizeof(rep_->elements[0])); + } + rep_->allocated_size = old_rep->allocated_size; + + const size_t old_size = + old_total_size * sizeof(rep_->elements[0]) + kRepHeaderSize; + if (arena == nullptr) { + internal::SizedDelete(old_rep, old_size); + } else { + arena_->ReturnArrayMemory(old_rep, old_size); + } + } else { + rep_->allocated_size = 0; + } + return &rep_->elements[current_size_]; +} + +void RepeatedPtrFieldBase::Reserve(int new_size) { + if (new_size > current_size_) { + InternalExtend(new_size - current_size_); + } +} + +void RepeatedPtrFieldBase::DestroyProtos() { + GOOGLE_DCHECK(rep_); + GOOGLE_DCHECK(arena_ == nullptr); + int n = rep_->allocated_size; + void* const* elements = rep_->elements; + for (int i = 0; i < n; i++) { + delete static_cast<MessageLite*>(elements[i]); + } + const size_t size = total_size_ * sizeof(elements[0]) + kRepHeaderSize; + internal::SizedDelete(rep_, size); + rep_ = nullptr; +} + +void* RepeatedPtrFieldBase::AddOutOfLineHelper(void* obj) { + if (!rep_ || rep_->allocated_size == total_size_) { + InternalExtend(1); // Equivalent to "Reserve(total_size_ + 1)" + } + ++rep_->allocated_size; + rep_->elements[current_size_++] = obj; + return obj; +} + +void RepeatedPtrFieldBase::CloseGap(int start, int num) { + if (rep_ == nullptr) return; + // Close up a gap of "num" elements starting at offset "start". + for (int i = start + num; i < rep_->allocated_size; ++i) + rep_->elements[i - num] = rep_->elements[i]; + current_size_ -= num; + rep_->allocated_size -= num; +} + +MessageLite* RepeatedPtrFieldBase::AddWeak(const MessageLite* prototype) { + if (rep_ != nullptr && current_size_ < rep_->allocated_size) { + return reinterpret_cast<MessageLite*>(rep_->elements[current_size_++]); + } + if (!rep_ || rep_->allocated_size == total_size_) { + Reserve(total_size_ + 1); + } + ++rep_->allocated_size; + MessageLite* result = prototype + ? prototype->New(arena_) + : Arena::CreateMessage<ImplicitWeakMessage>(arena_); + rep_->elements[current_size_++] = result; + return result; +} + +} // namespace internal + +} // namespace protobuf +} // namespace google + +#include <google/protobuf/port_undef.inc> |