Implement PacketReader method ReadPosition

src/PacketReader.h

@@ -105,6 +105,11 @@ namespace Feather
             return str;
         }
 
+        inline BlockPos ReadPosition()
+        {
+            return BlockPos(Read<int64_t>());
+        }
+
         uint32_t Length() const { return m_length; }
         uint32_t Size()   const { return m_length + m_lengthSize; }
 

src/Types.h

@@ -23,10 +23,19 @@ namespace Feather
 
     struct BlockPos
     {
-        const int32_t x, y, z;
+        int32_t x, y, z;
 
         BlockPos(int32_t x, int32_t y, int32_t z) : x(x), y(y), z(z) {}
 
+        // Decodes from packed long
+        BlockPos(int64_t l)
+            : x(l << (64 - X_OFFSET - PACKED_X_LENGTH) >> (64 - PACKED_X_LENGTH))
+            , y(l << (64 - Y_OFFSET - PACKED_Y_LENGTH) >> (64 - PACKED_Y_LENGTH))
+            , z(l << (64 - Z_OFFSET - PACKED_Z_LENGTH) >> (64 - PACKED_Z_LENGTH))
+        {}
+
+        BlockPos() : BlockPos(0, 0, 0) {}
+
         inline int64_t Encode()
         {
             int64_t l = 0;