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Dump familiar hexies in swift 16 bytes then UTF8 chars
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| import Foundation | |
| /* | |
| Hex Dumper | |
| */ | |
| public struct HexDump { | |
| /* | |
| leaving this public so we can add/remove chars | |
| if we feel like it | |
| */ | |
| public var unwanted : CharacterSet | |
| /* | |
| I can't believe we actually have to do this, but string will happily encode | |
| non printable chars as utf8 and I hate it | |
| */ | |
| private let printables = UInt8(0x21)...UInt8(0x7e) | |
| public init() { | |
| unwanted = .whitespacesAndNewlines | |
| unwanted.remove(charactersIn: " ") // keep spaces | |
| unwanted.insert(charactersIn: "\0") // ate nulls | |
| } | |
| func chunk(bytes:[UInt8], size: Int) -> [[UInt8]] { | |
| return stride(from: 0, to: bytes.count, by: size).map { | |
| Array(bytes[$0 ..< Swift.min($0 + size, bytes.count)]) | |
| } | |
| } | |
| /* | |
| TODO: -- | |
| make this work for BinaryInteger please, it will be a bit more involved, but | |
| hey, you can do it | |
| */ | |
| public func dump (bytes: [UInt8], width: Int = 16 ) -> String { | |
| var hexdump : [String] = [] | |
| for line in chunk(bytes: bytes, size: width) { | |
| // hexify | |
| var hexes = line.map { String(format: "%02x", $0) } | |
| .joined(separator: " ") | |
| // pad. | |
| // each hex element takes up 2 chars plus a space | |
| hexes += String(repeating: " ", count: (width - line.count) * 3) | |
| let chars = line.map { | |
| guard printables.contains($0) else { return "." } // sigh | |
| guard // non UTF8 (which is'nt much as it tuens out) | |
| let char = String(bytes: [$0], encoding: .utf8), | |
| char.rangeOfCharacter(from: unwanted) == nil | |
| else { return "." } | |
| return char | |
| } | |
| .joined(separator: "") | |
| hexdump += ["\(hexes) \(chars)"] | |
| } | |
| return hexdump.joined(separator: "\n") | |
| } | |
| } |
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Now an actual repo at https://github.com/SteveTrewick/HexDump