Initial commit

serialization.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+  "math"
+  "bytes"
+)
+
+func ToBinary(x int, bytes int) string {
+  if bytes == 0 {
+    return ""
+  } else {
+    return ToBinary(int(x / 256), bytes - 1) + string(x % 256)
+  }
+}
+
+func NumToVarInt(x int) string {
+  if x < 253 {
+    return string(x)
+  } else if x < int(math.Pow(2,16)) {
+    return string(253) + ToBinary(x, 2)
+  } else if x < int(math.Pow(2,32)) {
+    return string(253) + ToBinary(x, 4)
+  } else {
+    return string(253) + ToBinary(x, 8)
+  }
+}
+
+func RlpEncode(object interface{}) string {
+  if str, ok := object.(string); ok {
+    return "\x00" + NumToVarInt(len(str)) + str
+  } else if slice, ok := object.([]interface{}); ok {
+    var buffer bytes.Buffer
+    for _, val := range slice {
+      if v, ok := val.(string); ok {
+        buffer.WriteString(RlpEncode(v))
+      } else {
+        buffer.WriteString(RlpEncode(val))
+      }
+    }
+
+    return "\x01" + RlpEncode(len(buffer.String())) + buffer.String()
+  } else if slice, ok := object.([]string); ok {
+
+    // FIXME this isn't dry. Fix this
+    var buffer bytes.Buffer
+    for _, val := range slice {
+      buffer.WriteString(RlpEncode(val))
+    }
+    return "\x01" + RlpEncode(len(buffer.String())) + buffer.String()
+  }
+
+  return ""
+}
+
+type RlpSerializer interface {
+}
+