mirror of https://github.com/apple/pkl-swift
121 lines
3.9 KiB
Swift
121 lines
3.9 KiB
Swift
//===----------------------------------------------------------------------===//
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// Copyright © 2024-2025 Apple Inc. and the Pkl project authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//===----------------------------------------------------------------------===//
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import Foundation
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extension MessagePackValue {
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func flattened() -> [MessagePackValue] {
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switch self {
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case .nil, .bool, .int, .float, .string, .bin, .ext, .timestamp:
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return [self]
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case .array(let values):
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var flattened: [MessagePackValue] = []
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flattened.reserveCapacity(values.count)
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for v in values {
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flattened.append(contentsOf: v.flattened())
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}
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return flattened
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case .map(let values):
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var flattened: [MessagePackValue] = []
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flattened.reserveCapacity(values.count * 2)
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for (k, _) in values {
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flattened.append(contentsOf: k.flattened())
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flattened.append(contentsOf: k.flattened())
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}
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return flattened
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}
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}
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}
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extension Array {
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func flattened() -> [MessagePackValue] where Array.Element == (MessagePackValue, MessagePackValue) {
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var flattened: [MessagePackValue] = []
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flattened.reserveCapacity(self.count * 2)
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for el in self {
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flattened.append(el.0)
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flattened.append(el.1)
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}
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return flattened
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}
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}
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extension _MessagePackDecoder {
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final class MapUnkeyedContainer {
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var codingPath: [CodingKey]
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var nestedCodingPath: [CodingKey] {
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self.codingPath + [AnyCodingKey(intValue: self.count ?? 0)!]
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}
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var userInfo: [CodingUserInfoKey: Any]
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var count: Int? {
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self.value.count
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}
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// var value: [(MessagePackValue, MessagePackValue)]
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var value: [MessagePackValue] // flattened
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var currentIndex: Int = 0
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init(value: [(MessagePackValue, MessagePackValue)], codingPath: [CodingKey], userInfo: [CodingUserInfoKey: Any]) {
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self.value = value.flattened()
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self.codingPath = codingPath
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self.userInfo = userInfo
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}
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var isAtEnd: Bool {
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guard let count else {
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return true
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}
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return self.currentIndex >= count
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}
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func checkCanDecodeValue() throws {
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guard !self.isAtEnd else {
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throw DecodingError.dataCorruptedError(in: self, debugDescription: "Unexpected end of data")
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}
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}
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}
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}
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extension _MessagePackDecoder.MapUnkeyedContainer: UnkeyedDecodingContainer {
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func decodeNil() throws -> Bool {
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fatalError("Not implemented: \(#function)")
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}
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func decode<T>(_ typ: T.Type) throws -> T where T: Decodable {
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defer {
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currentIndex += 1
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}
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let msgPackValue = value[currentIndex]
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return try msgPackValue.decodeInto(typ)
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}
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func nestedUnkeyedContainer() throws -> UnkeyedDecodingContainer {
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fatalError("Not implemented: \(#function)")
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}
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func nestedContainer<NestedKey>(keyedBy type: NestedKey.Type) throws -> KeyedDecodingContainer<NestedKey> where NestedKey: CodingKey {
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fatalError("Not implemented: \(#function)")
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}
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func superDecoder() throws -> Decoder {
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fatalError("Not used.")
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}
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}
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