From 227c8015491ac9a870463cff02aba8f7111d601b Mon Sep 17 00:00:00 2001
From: Justin Kolb <franticapparatus@gmail.com>
Date: Sat, 1 Sep 2018 15:37:56 -0500
Subject: [PATCH] Add bytesWritten, bytesRead, and skip.

---
 Sources/Lilliput/BufferInputStream.swift   | 11 +++++++++++
 Sources/Lilliput/BufferOutputStream.swift  | 11 +++++++++++
 Sources/Lilliput/ByteInputStream.swift     |  2 ++
 Sources/Lilliput/ByteOutputStream.swift    |  2 ++
 Sources/Lilliput/OrderedInputStream.swift  |  2 ++
 Sources/Lilliput/OrderedOutputStream.swift |  2 ++
 6 files changed, 30 insertions(+)

diff --git a/Sources/Lilliput/BufferInputStream.swift b/Sources/Lilliput/BufferInputStream.swift
index baa3a69..5835e1c 100644
--- a/Sources/Lilliput/BufferInputStream.swift
+++ b/Sources/Lilliput/BufferInputStream.swift
@@ -31,6 +31,17 @@ public final class BufferInputStream : ByteInputStream {
         self.offset = 0
     }
     
+    public var bytesRead: Int {
+        @inline(__always) get {
+            return offset
+        }
+    }
+
+    @inline(__always)
+    public func skip(count: Int) throws {
+        offset += count
+    }
+
     public var remainingBytes: UnsafeRawPointer {
         @inline(__always)
         get {
diff --git a/Sources/Lilliput/BufferOutputStream.swift b/Sources/Lilliput/BufferOutputStream.swift
index 796df9a..a8803a1 100644
--- a/Sources/Lilliput/BufferOutputStream.swift
+++ b/Sources/Lilliput/BufferOutputStream.swift
@@ -31,6 +31,17 @@ public final class BufferOutputStream : ByteOutputStream {
         self.offset = 0
     }
     
+    public var bytesWritten: Int {
+        @inline(__always) get {
+            return offset
+        }
+    }
+    
+    @inline(__always)
+    public func skip(count: Int) throws {
+        offset += count
+    }
+
     public var remainingBytes: UnsafeMutableRawPointer {
         @inline(__always)
         get {
diff --git a/Sources/Lilliput/ByteInputStream.swift b/Sources/Lilliput/ByteInputStream.swift
index 95e2a01..33cf14e 100644
--- a/Sources/Lilliput/ByteInputStream.swift
+++ b/Sources/Lilliput/ByteInputStream.swift
@@ -23,6 +23,8 @@
  */
 
 public protocol ByteInputStream {
+    var bytesRead: Int { get }
+    func skip(count: Int) throws
     func readUInt8()  throws -> UInt8
     func readUInt16() throws -> UInt16
     func readUInt32() throws -> UInt32
diff --git a/Sources/Lilliput/ByteOutputStream.swift b/Sources/Lilliput/ByteOutputStream.swift
index e82a2f9..c370401 100644
--- a/Sources/Lilliput/ByteOutputStream.swift
+++ b/Sources/Lilliput/ByteOutputStream.swift
@@ -23,6 +23,8 @@
  */
 
 public protocol ByteOutputStream {
+    var bytesWritten: Int { get }
+    func skip(count: Int) throws
     func writeUInt8 (_ value: UInt8 ) throws
     func writeUInt16(_ value: UInt16) throws
     func writeUInt32(_ value: UInt32) throws
diff --git a/Sources/Lilliput/OrderedInputStream.swift b/Sources/Lilliput/OrderedInputStream.swift
index 8174d0d..c738b01 100644
--- a/Sources/Lilliput/OrderedInputStream.swift
+++ b/Sources/Lilliput/OrderedInputStream.swift
@@ -29,6 +29,8 @@ public final class OrderedInputStream<Order : ByteOrder> : ByteInputStream {
         self.stream = stream
     }
 
+    public var bytesRead: Int { @inline(__always) get { return stream.bytesRead } }
+    @inline(__always) public func skip(count: Int) throws { try stream.skip(count: count) }
     @inline(__always) public func readUInt8()  throws -> UInt8  { return try stream.readUInt8() }
     @inline(__always) public func readUInt16() throws -> UInt16 { return Order.swapOrderUInt16(try stream.readUInt16()) }
     @inline(__always) public func readUInt32() throws -> UInt32 { return Order.swapOrderUInt32(try stream.readUInt32()) }
diff --git a/Sources/Lilliput/OrderedOutputStream.swift b/Sources/Lilliput/OrderedOutputStream.swift
index c297e97..ccb799d 100644
--- a/Sources/Lilliput/OrderedOutputStream.swift
+++ b/Sources/Lilliput/OrderedOutputStream.swift
@@ -29,6 +29,8 @@ public final class OrderedOutputStream<Order : ByteOrder> : ByteOutputStream {
         self.stream = stream
     }
 
+    public var bytesWritten: Int { @inline(__always) get { return stream.bytesWritten } }
+    @inline(__always) public func skip(count: Int) throws { try stream.skip(count: count) }
     @inline(__always) public func writeUInt8 (_ value: UInt8 ) throws { try stream.writeUInt8(value) }
     @inline(__always) public func writeUInt16(_ value: UInt16) throws { try stream.writeUInt16(Order.swapOrderUInt16(value)) }
     @inline(__always) public func writeUInt32(_ value: UInt32) throws { try stream.writeUInt32(Order.swapOrderUInt32(value)) }