From 4630b3315aa249508036998e4ed122b5ba260ba1 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Mon, 7 Aug 2017 16:46:09 +0200
Subject: Interface for new ABI encoder.

---
 libsolidity/codegen/CompilerUtils.cpp | 32 ++++++++++++++++++++++++++++++++
 libsolidity/codegen/CompilerUtils.h   |  8 ++++++++
 2 files changed, 40 insertions(+)

(limited to 'libsolidity/codegen')

diff --git a/libsolidity/codegen/CompilerUtils.cpp b/libsolidity/codegen/CompilerUtils.cpp
index 782aad9d..d2dab7d7 100644
--- a/libsolidity/codegen/CompilerUtils.cpp
+++ b/libsolidity/codegen/CompilerUtils.cpp
@@ -25,6 +25,7 @@
 #include <libevmasm/Instruction.h>
 #include <libsolidity/codegen/ArrayUtils.h>
 #include <libsolidity/codegen/LValue.h>
+#include <libsolidity/codegen/ABIFunctions.h>
 
 using namespace std;
 
@@ -180,8 +181,17 @@ void CompilerUtils::encodeToMemory(
 		t = t->mobileType()->interfaceType(_encodeAsLibraryTypes)->encodingType();
 	}
 
+	bool activateNewEncoder = false;
 	if (_givenTypes.empty())
 		return;
+	else if (activateNewEncoder && _padToWordBoundaries && !_copyDynamicDataInPlace)
+	{
+		// Use the new JULIA-based encoding function
+		auto stackHeightBefore = m_context.stackHeight();
+		abiEncode(_givenTypes, targetTypes, _encodeAsLibraryTypes);
+		solAssert(stackHeightBefore - m_context.stackHeight() == sizeOnStack(_givenTypes), "");
+		return;
+	}
 
 	// Stack during operation:
 	// <v1> <v2> ... <vn> <mem_start> <dyn_head_1> ... <dyn_head_r> <end_of_mem>
@@ -289,6 +299,28 @@ void CompilerUtils::encodeToMemory(
 	popStackSlots(argSize + dynPointers + 1);
 }
 
+void CompilerUtils::abiEncode(
+	TypePointers const& _givenTypes,
+	TypePointers const& _targetTypes,
+	bool _encodeAsLibraryTypes
+)
+{
+	// stack: <$value0> <$value1> ... <$value(n-1)> <$headStart>
+
+	vector<string> variables;
+	size_t numValues = sizeOnStack(_givenTypes);
+	for (size_t i = 0; i < numValues; ++i)
+			variables.push_back("$value" + to_string(i));
+	variables.push_back("$headStart");
+
+	ABIFunctions funs;
+	string routine = funs.tupleEncoder(_givenTypes, _targetTypes, _encodeAsLibraryTypes);
+	routine += funs.requestedFunctions();
+	m_context.appendInlineAssembly("{" + routine + "}", variables);
+	// Remove everyhing except for "value0" / the final memory pointer.
+	popStackSlots(numValues);
+}
+
 void CompilerUtils::zeroInitialiseMemoryArray(ArrayType const& _type)
 {
 	auto repeat = m_context.newTag();
diff --git a/libsolidity/codegen/CompilerUtils.h b/libsolidity/codegen/CompilerUtils.h
index fb169463..09427788 100644
--- a/libsolidity/codegen/CompilerUtils.h
+++ b/libsolidity/codegen/CompilerUtils.h
@@ -103,6 +103,14 @@ public:
 		bool _encodeAsLibraryTypes = false
 	);
 
+	/// Special case of @a encodeToMemory which assumes that everything is padded to words
+	/// and dynamic data is not copied in place (i.e. a proper ABI encoding).
+	void abiEncode(
+		TypePointers const& _givenTypes,
+		TypePointers const& _targetTypes,
+		bool _encodeAsLibraryTypes = false
+	);
+
 	/// Zero-initialises (the data part of) an already allocated memory array.
 	/// Length has to be nonzero!
 	/// Stack pre: <length> <memptr>
-- 
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