primitive write and read null and empty string #29 #30

primitive write and read null and empty string #29 #30

src/src/primitive/partials/Primitive.cs

@@ -6,6 +6,7 @@ public partial class Primitive : IPrimitive
     {
         private static readonly IPrimitivePrefix Prefix;
         private readonly List<byte> _bytes = new List<byte>();
+        private readonly byte[] _nullPrefix = { 0, 9 }; // 0 mean begin - 9 mean end. (from begin to end)
 
         static Primitive()
         {

src/src/primitive/partials/PrimitiveAdd.cs

@@ -125,12 +125,11 @@ public void String(string value)
                 Vault.Add(Prefix.String);
 
                 var bytes = Encoding.UTF8.GetBytes(value ?? string.Empty);
+                var length = (uint)bytes.LongLength;
 
-                uint size = (uint)bytes.LongLength;
-
-                Vault.AddRange(BitConverter.GetBytes(size));
+                Vault.AddRange(BitConverter.GetBytes(length));
 
-                if (bytes.Length > 0) Vault.AddRange(bytes);
+                if (length > 0) Vault.AddRange(bytes);
             }
 
             public void Class<T>(T value)
@@ -189,7 +188,7 @@ public void Struct<T>(T value)
                 }
 
                 uint size = 0;
-                
+
                 foreach (var prop in props)
                     if (prop.CanRead && prop.CanWrite)
                     {

src/src/primitive/partials/PrimitiveGet.cs

@@ -330,7 +330,9 @@ public string String()
 
                     Position += sizeof(uint);
 
-                    if (valueSize <= 0 || valueSize > Vault.Count - Position) throw new InvalidDataException();
+                    if (valueSize == 0) return default;
+
+                    if (valueSize > Vault.Count - Position) throw new InvalidDataException();
 
                     var value = Vault.GetRange((int)Position, (int)valueSize).ToArray();