xref: /aosp_15_r20/external/rust/android-crates-io/crates/grpcio-sys/grpc/third_party/upb/upbc/file_layout.cc

// Copyright (c) 2009-2021, Google LLC
// 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 LLC 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 Google LLC 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 "upbc/file_layout.h"

#include <string>
#include <unordered_set>

#include "upb/mini_table/extension_internal.h"
#include "upbc/common.h"

namespace upbc {

const char* kEnumsInit = "enums_layout";
const char* kExtensionsInit = "extensions_layout";
const char* kMessagesInit = "messages_layout";

void AddEnums(upb::MessageDefPtr message, std::vector<upb::EnumDefPtr>* enums) {
  enums->reserve(enums->size() + message.enum_type_count());
  for (int i = 0; i < message.enum_type_count(); i++) {
    enums->push_back(message.enum_type(i));
  }
  for (int i = 0; i < message.nested_message_count(); i++) {
    AddEnums(message.nested_message(i), enums);
  }
}

std::vector<upb::EnumDefPtr> SortedEnums(upb::FileDefPtr file) {
  std::vector<upb::EnumDefPtr> enums;
  enums.reserve(file.toplevel_enum_count());
  for (int i = 0; i < file.toplevel_enum_count(); i++) {
    enums.push_back(file.toplevel_enum(i));
  }
  for (int i = 0; i < file.toplevel_message_count(); i++) {
    AddEnums(file.toplevel_message(i), &enums);
  }
  std::sort(enums.begin(), enums.end(),
            [](upb::EnumDefPtr a, upb::EnumDefPtr b) {
              return strcmp(a.full_name(), b.full_name()) < 0;
            });
  return enums;
}

std::vector<uint32_t> SortedUniqueEnumNumbers(upb::EnumDefPtr e) {
  std::vector<uint32_t> values;
  values.reserve(e.value_count());
  for (int i = 0; i < e.value_count(); i++) {
    values.push_back(static_cast<uint32_t>(e.value(i).number()));
  }
  std::sort(values.begin(), values.end());
  auto last = std::unique(values.begin(), values.end());
  values.erase(last, values.end());
  return values;
}

void AddMessages(upb::MessageDefPtr message,
                 std::vector<upb::MessageDefPtr>* messages) {
  messages->push_back(message);
  for (int i = 0; i < message.nested_message_count(); i++) {
    AddMessages(message.nested_message(i), messages);
  }
}

// Ordering must match upb/def.c!
//
// The ordering is significant because each upb_MessageDef* will point at the
// corresponding upb_MiniTable and we just iterate through the list without
// any search or lookup.
std::vector<upb::MessageDefPtr> SortedMessages(upb::FileDefPtr file) {
  std::vector<upb::MessageDefPtr> messages;
  for (int i = 0; i < file.toplevel_message_count(); i++) {
    AddMessages(file.toplevel_message(i), &messages);
  }
  return messages;
}

void AddExtensionsFromMessage(upb::MessageDefPtr message,
                              std::vector<upb::FieldDefPtr>* exts) {
  for (int i = 0; i < message.nested_extension_count(); i++) {
    exts->push_back(message.nested_extension(i));
  }
  for (int i = 0; i < message.nested_message_count(); i++) {
    AddExtensionsFromMessage(message.nested_message(i), exts);
  }
}

// Ordering must match upb/def.c!
//
// The ordering is significant because each upb_FieldDef* will point at the
// corresponding upb_MiniTableExtension and we just iterate through the list
// without any search or lookup.
std::vector<upb::FieldDefPtr> SortedExtensions(upb::FileDefPtr file) {
  std::vector<upb::FieldDefPtr> ret;
  ret.reserve(file.toplevel_extension_count());
  for (int i = 0; i < file.toplevel_extension_count(); i++) {
    ret.push_back(file.toplevel_extension(i));
  }
  for (int i = 0; i < file.toplevel_message_count(); i++) {
    AddExtensionsFromMessage(file.toplevel_message(i), &ret);
  }
  return ret;
}

std::vector<upb::FieldDefPtr> FieldNumberOrder(upb::MessageDefPtr message) {
  std::vector<upb::FieldDefPtr> fields;
  fields.reserve(message.field_count());
  for (int i = 0; i < message.field_count(); i++) {
    fields.push_back(message.field(i));
  }
  std::sort(fields.begin(), fields.end(),
            [](upb::FieldDefPtr a, upb::FieldDefPtr b) {
              return a.number() < b.number();
            });
  return fields;
}

}  // namespace upbc