Ever more repotting.

1 files changed, 66 insertions, 0 deletions

diff --git a/Assembly.h b/Assembly.h
index e69de29b..28d2974b 100644
--- a/Assembly.h
+++ b/Assembly.h
@@ -0,0 +1,66 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file CodeFragment.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2014
+ */
+
+#pragma once
+
+#include <libethsupport/Common.h>
+#include <libethcore/Instruction.h>
+#include "Exceptions.h"
+
+namespace eth
+{
+
+enum AssemblyItemType { Operation, Push, PushString, PushTag, Tag, PushData };
+
+class AssemblyItem
+{
+public:
+	AssemblyItem(u256 _push): m_type(Push), m_data(_push) {}
+	AssemblyItem(std::string const& _push): m_type(PushString), m_pushString(_push) {}
+	AssemblyItem(AssemblyItemType _type, AssemblyItem const& _tag): m_type(_type), m_data(_tag.m_data) { assert(_type == PushTag); assert(_tag.m_type == Tag); }
+	AssemblyItem(Instruction _i): m_type(Operation), m_data((byte)_i) {}
+	AssemblyItem(AssemblyItemType _type, u256 _data): m_type(_type), m_data(_data) {}
+
+	AssemblyItemType type() const { return m_type; }
+	u256 data() const { return m_data; }
+	std::string const& pushString() const { return m_pushString; }
+
+private:
+	AssemblyItemType m_type;
+	u256 m_data;
+	std::string m_pushString;
+};
+
+class Assembly
+{
+public:
+	AssemblyItem newTag() { return AssemblyItem(Tag, m_usedTags++); }
+	AssemblyItem newData(bytes const& _data) { auto h = sha3(_data); m_data[h] = _data; return AssemblyItem(PushData, h); }
+	bytes assemble() const;
+	void append(Assembly const& _a);
+
+private:
+	u256 m_usedTags = 0;
+	std::vector<AssemblyItem> m_items;
+	std::map<h256, bytes> m_data;
+};
+
+}