| // Copyright 2016 The Tulsi Authors. All rights reserved. |
| // |
| // 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. |
| |
| /// Global ID generator. |
| protocol GIDGeneratorProtocol { |
| /// Generates a unique ID for the given project item. The generator implementation must guarantee |
| /// that generate calls will never produce the same GID (e.g., multiple generate calls with the |
| /// same or any different item will generate different GIDs each time). |
| func generate(_ item: PBXObjectProtocol) -> String |
| } |
| |
| |
| /// Implementation of GIDGeneratorProtocol. |
| final class ConcreteGIDGenerator: GIDGeneratorProtocol { |
| /// Map of hash prefix to the last used counter for that prefix. |
| private var reservedIDS = [String: Int]() |
| |
| func generate(_ item: PBXObjectProtocol) -> String { |
| let hash = String(format: "%08X%08X", item.isa.hashValue, item.hashValue) |
| let counter = reservedIDS[hash] ?? 0 |
| let gid = String(format: "\(hash)%08X", counter) |
| reservedIDS[hash] = counter + 1 |
| return gid |
| } |
| } |
