//  Copyright © 2019 IBM. All rights reserved.
//
//     Licensed under the Apache License, Version 2.0 (the "License");
//     you may not use this file except in compliance with the License.
//     You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
//     Unless required by applicable law or agreed to in writing, software
//     distributed under the License is distributed on an "AS IS" BASIS,
//     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//     See the License for the specific language governing permissions and
//     limitations under the License.
//

import Foundation

#if !swift(>=5.0)
// Extension to allow Swift 5 `withUnsafeBytes` API for earlier versions
internal extension Data {
    func withUnsafeBytes<T>(_ body: (UnsafeRawBufferPointer) throws -> T) rethrows -> T {
        let c = count
        return try withUnsafeBytes { (p: UnsafePointer<UInt8>) throws -> T in
            try body(UnsafeRawBufferPointer(start: p, count: c))
        }
    }
    
    mutating func withUnsafeMutableBytes<T>(_ body: (UnsafeMutableRawBufferPointer) throws -> T) rethrows -> T {
        let c = count
        return try withUnsafeMutableBytes { (p: UnsafeMutablePointer<UInt8>) throws -> T in
            try body(UnsafeMutableRawBufferPointer(start: p, count: c))
        }
    }
    
    init(_ bytes: [UInt8]) {
        self.init(bytes: bytes)
    } 
}
#endif