Add MemoryProvider ToMemoryStream(ROS<byte>) API

Author: mythz

src/ServiceStack.Text/DefaultMemory.cs

@@ -559,6 +559,9 @@ public override int FromUtf8(ReadOnlySpan<byte> source, Span<char> destination)
         public override byte[] ToUtf8Bytes(ReadOnlySpan<char> source) => Encoding.UTF8.GetBytes(source.ToArray());
 
         public override string FromUtf8Bytes(ReadOnlySpan<byte> source) => Encoding.UTF8.GetString(source.ToArray());
+        
+        public override MemoryStream ToMemoryStream(ReadOnlySpan<byte> source) => 
+            MemoryStreamFactory.GetStream(source.ToArray());
 
         private static Guid ParseGeneralStyleGuid(ReadOnlySpan<char> value, out int len)
         {
@@ -567,7 +570,7 @@ private static Guid ParseGeneralStyleGuid(ReadOnlySpan<char> value, out int len)
 
             int dash = 0;
             len = 32;
-            bool hasParentesis = false;
+            bool hasParenthesis = false;
 
             if (value.Length < len)
                 throw new FormatException(BadFormat);
@@ -577,7 +580,7 @@ private static Guid ParseGeneralStyleGuid(ReadOnlySpan<char> value, out int len)
             {
                 n++;
                 len += 2;
-                hasParentesis = true;
+                hasParenthesis = true;
 
                 if (buf[8 + n] != '-')
                     throw new FormatException(BadFormat);
@@ -597,7 +600,7 @@ private static Guid ParseGeneralStyleGuid(ReadOnlySpan<char> value, out int len)
             if (value.Length < len)
                 throw new FormatException(BadFormat);
 
-            if (hasParentesis)
+            if (hasParenthesis)
             {
                 var ce = buf[len - 1];
 

src/ServiceStack.Text/MemoryProvider.cs

@@ -69,5 +69,6 @@ public abstract Task<object> DeserializeAsync(Stream stream, Type type,
 
         public abstract byte[] ToUtf8Bytes(ReadOnlySpan<char> source);
         public abstract string FromUtf8Bytes(ReadOnlySpan<byte> source);
+        public abstract MemoryStream ToMemoryStream(ReadOnlySpan<byte> source);
     }
 }

src/ServiceStack.Text/NetCoreMemory.cs

@@ -189,6 +189,12 @@ public override ReadOnlyMemory<char> FromUtf8(ReadOnlySpan<byte> source)
         public override byte[] ToUtf8Bytes(ReadOnlySpan<char> source) => ToUtf8(source).ToArray();
 
         public override string FromUtf8Bytes(ReadOnlySpan<byte> source) => FromUtf8(source).ToString();
+        public override MemoryStream ToMemoryStream(ReadOnlySpan<byte> source)
+        {
+            var ms = MemoryStreamFactory.GetStream(source.Length);
+            ms.Write(source);
+            return ms;
+        }
     }    
 }