Ihar Katkavets
78 lines
2.6 KiB
Swift
78 lines
2.6 KiB
Swift
//
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// MIT License
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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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import zlib
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public typealias GzipCompressionLevel = Int32
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public extension GzipCompressionLevel {
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static let noCompression = Z_NO_COMPRESSION
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static let bestSpeed = Z_BEST_SPEED
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static let bestCompression = Z_BEST_COMPRESSION
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static let defaultCompression = Z_DEFAULT_COMPRESSION
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}
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public struct GzipStreamError: LocalizedError {
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public enum Kind {
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case streamError
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case dataError
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case memoryError
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case bufferError
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case versionError
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case otherError(code: Int32)
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}
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public let file: String
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public let line: Int
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public let code: Int
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public let description: String?
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public let kind: Kind
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internal init(file: String = #file, line: Int = #line, code: Int32, description dPtr: UnsafePointer<CChar>?) {
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self.file = String(describing: file)
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self.code = Int(code)
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self.line = line
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self.description = dPtr.flatMap { String(cString: $0, encoding: .utf8) }
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switch code {
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case Z_STREAM_ERROR: // -2
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kind = .streamError
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case Z_DATA_ERROR: // -3
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kind = .dataError
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case Z_MEM_ERROR: // -4
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kind = .memoryError
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case Z_BUF_ERROR: // -5
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kind = .bufferError
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case Z_VERSION_ERROR: // -6
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kind = .versionError
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default:
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kind = .otherError(code: code)
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}
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}
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public var errorDescription: String? {
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return "\(file):\(line) " + (description ?? "")
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}
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}
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