Ihar Katkavets
65 lines
2.2 KiB
Swift
65 lines
2.2 KiB
Swift
//
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// The MIT License (MIT)
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//
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// Copyright (c) 2023 Ihar Katkavets
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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import Foundation
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public final class FileInputStream: InputStream {
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private let fileHandle: FileHandle
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private var eofReached = false
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public init(with fileHandle: FileHandle) {
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self.fileHandle = fileHandle
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}
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public init?(with localFileURL: URL) {
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guard let fileHandle = try? FileHandle(forReadingFrom: localFileURL) else {
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return nil
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}
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self.fileHandle = fileHandle
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}
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public var hasBytesAvailable: Bool {
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return !eofReached
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}
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public func open() throws {
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}
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public func read(_ buffer: UnsafeMutablePointer<UInt8>, maxLength len: Int) -> Int {
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let readData = fileHandle.readData(ofLength: len)
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eofReached = (readData.count != len)
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readData.withUnsafeBytes {
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if let baseAddress = $0.baseAddress {
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let t = baseAddress.assumingMemoryBound(to: UInt8.self)
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buffer.initialize(from: t, count: readData.count)
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}
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}
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return readData.count
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}
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public func close() {
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}
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}
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