Initial commit

Emoney Info/Classes/api/utils/ByteArrayAndHexHelper.swift

@@ -0,0 +1,41 @@
+import Foundation
+
+
+public class ByteArrayAndHexHelper {
+    
+    public static func digitalStrIntoAsciiUInt8Array(digitalStr : String) -> [UInt8]{
+      var bytes = [UInt8]()
+      for s in digitalStr {
+        if let byte = UInt8(String(s)) {
+          bytes.append(0x30 + byte)
+        }
+      }
+      return bytes
+    }
+    
+    public static func hexStrToUInt8Array(hexStr: String) -> [UInt8] {
+      var startIndex = hexStr.startIndex
+      return (0..<hexStr.count/2).compactMap { _ in
+        let endIndex = hexStr.index(after: startIndex)
+        defer { startIndex = hexStr.index(after: endIndex) }
+        return UInt8(hexStr[startIndex...endIndex], radix: 16)
+      }
+    }
+    
+    public static func hex(from string: String) -> Data {
+      .init(stride(from: 0, to: string.count, by: 2).map {
+        string[string.index(string.startIndex, offsetBy: $0) ... string.index(string.startIndex, offsetBy: $0 + 1)]
+      }.map {
+        UInt8($0, radix: 16)!
+      })
+    }
+    
+    public static func makeShort(src: [UInt8], srcOff : Int) -> Int {
+      // if (srcOff < 0  ||  src.length < (srcOff + 2))
+      //   throw new IllegalArgumentException("Bad args!");
+      let b0 = Int(src[srcOff] & 0xFF);
+      let b1 = Int(src[srcOff + 1] & 0xFF);
+      return (b0 << 8) + b1
+    }
+    
+}