From 5a2d62e4d9e551f16f094216da70b7a6f5d2bf00 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Wed, 30 Jul 2014 13:06:59 +0200
Subject: [PATCH] Added better data parser

---
 ethutil/bytes.go      | 20 ++++++++++++++++++++
 ethutil/bytes_test.go | 14 ++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 ethutil/bytes_test.go

diff --git a/ethutil/bytes.go b/ethutil/bytes.go
index 4027e3986..49fc229d3 100644
--- a/ethutil/bytes.go
+++ b/ethutil/bytes.go
@@ -131,6 +131,26 @@ func FormatData(data string) []byte {
 	return BigToBytes(d, 256)
 }
 
+func ParseData(data ...interface{}) (ret []byte) {
+	for _, item := range data {
+		switch t := item.(type) {
+		case string:
+			var str []byte
+			if IsHex(t) {
+				str = Hex2Bytes(t[2:])
+			} else {
+				str = []byte(t)
+			}
+
+			ret = append(ret, RightPadBytes(str, 32)...)
+		case []byte:
+			ret = append(ret, LeftPadBytes(t, 32)...)
+		}
+	}
+
+	return
+}
+
 func RightPadBytes(slice []byte, l int) []byte {
 	if l < len(slice) {
 		return slice
diff --git a/ethutil/bytes_test.go b/ethutil/bytes_test.go
new file mode 100644
index 000000000..381efe7a2
--- /dev/null
+++ b/ethutil/bytes_test.go
@@ -0,0 +1,14 @@
+package ethutil
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestParseData(t *testing.T) {
+	data := ParseData("hello", "world", "0x0106")
+	exp := "68656c6c6f000000000000000000000000000000000000000000000000000000776f726c640000000000000000000000000000000000000000000000000000000106000000000000000000000000000000000000000000000000000000000000"
+	if bytes.Compare(data, Hex2Bytes(exp)) != 0 {
+		t.Error("Error parsing data")
+	}
+}