74 lines
2.6 KiB
Swift
74 lines
2.6 KiB
Swift
//
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// SocketStringReader.swift
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// Socket.IO-Client-Swift
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//
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// Created by Lukas Schmidt on 07.09.15.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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struct SocketStringReader {
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let message: String
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var currentIndex: String.UTF16View.Index
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var hasNext: Bool {
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return currentIndex != message.utf16.endIndex
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}
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var currentCharacter: String {
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return String(UnicodeScalar(message.utf16[currentIndex])!)
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}
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init(message: String) {
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self.message = message
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currentIndex = message.utf16.startIndex
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}
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@discardableResult
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mutating func advance(by: Int) -> String.UTF16View.Index {
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currentIndex = message.utf16.index(currentIndex, offsetBy: by)
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return currentIndex
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}
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mutating func read(count: Int) -> String {
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let readString = String(message.utf16[currentIndex..<message.utf16.index(currentIndex, offsetBy: count)])!
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advance(by: count)
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return readString
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}
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mutating func readUntilOccurence(of string: String) -> String {
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let substring = message.utf16[currentIndex...]
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guard let foundIndex = substring.firstIndex(where: { $0 == string.utf16.first! }) else {
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currentIndex = message.utf16.endIndex
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return String(substring)!
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}
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advance(by: substring.distance(from: substring.startIndex, to: foundIndex) + 1)
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return String(substring[substring.startIndex..<foundIndex])!
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}
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mutating func readUntilEnd() -> String {
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return read(count: message.utf16.distance(from: currentIndex, to: message.utf16.endIndex))
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}
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}
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