android_frameworks_base/libs/androidfw/ResourceUtils.cpp

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * 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.
 */

#include "androidfw/ResourceUtils.h"

namespace android {

bool ExtractResourceName(const StringPiece& str, StringPiece* out_package, StringPiece* out_type,
                         StringPiece* out_entry) {
  *out_package = "";
  *out_type = "";
  bool has_package_separator = false;
  bool has_type_separator = false;
  const char* start = str.data();
  const char* end = start + str.size();
  if (start[0] == '@') {
      start++;
  }
  const char* current = start;
  while (current != end) {
    if (out_type->size() == 0 && *current == '/') {
      has_type_separator = true;
      out_type->assign(start, current - start);
      start = current + 1;
    } else if (out_package->size() == 0 && *current == ':') {
      has_package_separator = true;
      out_package->assign(start, current - start);
      start = current + 1;
    }
    current++;
  }
  out_entry->assign(start, end - start);

  return !(has_package_separator && out_package->empty()) &&
         !(has_type_separator && out_type->empty());
}

}  // namespace android