93 lines
2.2 KiB
Swift
Executable File
93 lines
2.2 KiB
Swift
Executable File
//
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// UnicodeIterator.swift
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// CSV
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//
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// Created by Yasuhiro Hatta on 2016/06/20.
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// Copyright © 2016年 yaslab. All rights reserved.
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//
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import Foundation
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/*
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internal struct UnicodeIterator<
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Input: IteratorProtocol,
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InputEncoding: UnicodeCodec
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where InputEncoding.CodeUnit == Input.Element>
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: IteratorProtocol {
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private var input: Input
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private var inputEncoding: InputEncoding
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internal init(input: Input, inputEncoding: InputEncoding.Type) {
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self.input = input
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self.inputEncoding = inputEncoding.init()
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}
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internal mutating func next() -> UnicodeScalar? {
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switch inputEncoding.decode(&input) {
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case .scalarValue(let c): return c
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case .emptyInput: return nil
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case .error: return nil
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}
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}
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}
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*/
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public struct UTF32Iterator: IteratorProtocol {
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private var innerIterator: BinaryReader.UInt32Iterator
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private var codec = UTF32()
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internal init(reader: BinaryReader) {
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self.innerIterator = reader.makeUInt32Iterator()
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}
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public mutating func next() -> UnicodeScalar? {
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switch codec.decode(&innerIterator) {
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case .scalarValue(let c): return c
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case .emptyInput: return nil
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case .error: return nil
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}
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}
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}
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public struct UTF16Iterator: IteratorProtocol {
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private var innerIterator: BinaryReader.UInt16Iterator
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private var codec = UTF16()
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internal init(reader: BinaryReader) {
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self.innerIterator = reader.makeUInt16Iterator()
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}
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public mutating func next() -> UnicodeScalar? {
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switch codec.decode(&innerIterator) {
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case .scalarValue(let c): return c
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case .emptyInput: return nil
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case .error: return nil
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}
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}
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}
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public struct UTF8Iterator: IteratorProtocol {
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private var innerIterator: BinaryReader.UInt8Iterator
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private var codec = UTF8()
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internal init(reader: BinaryReader) {
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self.innerIterator = reader.makeUInt8Iterator()
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}
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public mutating func next() -> UnicodeScalar? {
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switch codec.decode(&innerIterator) {
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case .scalarValue(let c): return c
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case .emptyInput: return nil
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case .error: return nil
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}
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}
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}
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