6 files changed, 38 insertions, 21 deletions
diff --git a/libsolidity/codegen/Compiler.h b/libsolidity/codegen/Compiler.h
index c6ee93fb..06654486 100644
--- a/libsolidity/codegen/Compiler.h
+++ b/libsolidity/codegen/Compiler.h
@@ -60,10 +60,14 @@ public:
 	/// @returns Only the runtime object (without constructor).
 	eth::LinkerObject runtimeObject() const { return m_context.assembledRuntimeObject(m_runtimeSub); }
 	/// @arg _sourceCodes is the map of input files to source code strings
-	/// @arg _inJsonFromat shows whether the out should be in Json format
-	Json::Value streamAssembly(std::ostream& _stream, StringMap const& _sourceCodes = StringMap(), bool _inJsonFormat = false) const
+	std::string assemblyString(StringMap const& _sourceCodes = StringMap()) const
 	{
-		return m_context.streamAssembly(_stream, _sourceCodes, _inJsonFormat);
+		return m_context.assemblyString(_sourceCodes);
+	}
+	/// @arg _sourceCodes is the map of input files to source code strings
+	Json::Value assemblyJSON(StringMap const& _sourceCodes = StringMap()) const
+	{
+		return m_context.assemblyJSON(_sourceCodes);
 	}
 	/// @returns Assembly items of the normal compiler context
 	eth::AssemblyItems const& assemblyItems() const { return m_context.assembly().items(); }
diff --git a/libsolidity/codegen/CompilerContext.h b/libsolidity/codegen/CompilerContext.h
index 3994b010..5116585e 100644
--- a/libsolidity/codegen/CompilerContext.h
+++ b/libsolidity/codegen/CompilerContext.h
@@ -209,10 +209,15 @@ public:
 	eth::Assembly& nonConstAssembly() { return *m_asm; }
 
 	/// @arg _sourceCodes is the map of input files to source code strings
-	/// @arg _inJsonFormat shows whether the out should be in Json format
-	Json::Value streamAssembly(std::ostream& _stream, StringMap const& _sourceCodes = StringMap(), bool _inJsonFormat = false) const
+	std::string assemblyString(StringMap const& _sourceCodes = StringMap()) const
 	{
-		return m_asm->stream(_stream, "", _sourceCodes, _inJsonFormat);
+		return m_asm->assemblyString(_sourceCodes);
+	}
+
+	/// @arg _sourceCodes is the map of input files to source code strings
+	Json::Value assemblyJSON(StringMap const& _sourceCodes = StringMap()) const
+	{
+		return m_asm->assemblyJSON(_sourceCodes);
 	}
 
 	eth::LinkerObject const& assembledObject() const { return m_asm->assemble(); }
diff --git a/libsolidity/interface/AssemblyStack.cpp b/libsolidity/interface/AssemblyStack.cpp
index 23524bb3..504ad92c 100644
--- a/libsolidity/interface/AssemblyStack.cpp
+++ b/libsolidity/interface/AssemblyStack.cpp
@@ -91,9 +91,7 @@ MachineAssemblyObject AssemblyStack::assemble(Machine _machine) const
 		eth::Assembly assembly;
 		assembly::CodeGenerator::assemble(*m_parserResult, *m_analysisInfo, assembly);
 		object.bytecode = make_shared<eth::LinkerObject>(assembly.assemble());
-		ostringstream tmp;
-		assembly.stream(tmp);
-		object.assembly = tmp.str();
+		object.assembly = assembly.assemblyString();
 		return object;
 	}
 	case Machine::EVM15:
diff --git a/libsolidity/interface/CompilerStack.cpp b/libsolidity/interface/CompilerStack.cpp
index 259694da..41bbf687 100644
--- a/libsolidity/interface/CompilerStack.cpp
+++ b/libsolidity/interface/CompilerStack.cpp
@@ -347,16 +347,24 @@ eth::LinkerObject const& CompilerStack::cloneObject(string const& _contractName)
 	return contract(_contractName).cloneObject;
 }
 
-Json::Value CompilerStack::streamAssembly(ostream& _outStream, string const& _contractName, StringMap _sourceCodes, bool _inJsonFormat) const
+/// FIXME: cache this string
+string CompilerStack::assemblyString(string const& _contractName, StringMap _sourceCodes) const
 {
 	Contract const& currentContract = contract(_contractName);
 	if (currentContract.compiler)
-		return currentContract.compiler->streamAssembly(_outStream, _sourceCodes, _inJsonFormat);
+		return currentContract.compiler->assemblyString(_sourceCodes);
+	else
+		return string();
+}
+
+/// FIXME: cache the JSON
+Json::Value CompilerStack::assemblyJSON(string const& _contractName, StringMap _sourceCodes) const
+{
+	Contract const& currentContract = contract(_contractName);
+	if (currentContract.compiler)
+		return currentContract.compiler->assemblyJSON(_sourceCodes);
 	else
-	{
-		_outStream << "Contract not fully implemented" << endl;
 		return Json::Value();
-	}
 }
 
 vector<string> CompilerStack::sourceNames() const
diff --git a/libsolidity/interface/CompilerStack.h b/libsolidity/interface/CompilerStack.h
index 2756e57d..f1bbae47 100644
--- a/libsolidity/interface/CompilerStack.h
+++ b/libsolidity/interface/CompilerStack.h
@@ -190,11 +190,15 @@ public:
 	/// if the contract does not (yet) have bytecode.
 	std::string const* runtimeSourceMapping(std::string const& _contractName = "") const;
 
-	/// Streams a verbose version of the assembly to @a _outStream.
+	/// @return a verbose text representation of the assembly.
 	/// @arg _sourceCodes is the map of input files to source code strings
-	/// @arg _inJsonFromat shows whether the out should be in Json format
 	/// Prerequisite: Successful compilation.
-	Json::Value streamAssembly(std::ostream& _outStream, std::string const& _contractName = "", StringMap _sourceCodes = StringMap(), bool _inJsonFormat = false) const;
+	std::string assemblyString(std::string const& _contractName = "", StringMap _sourceCodes = StringMap()) const;
+
+	/// @returns a JSON representation of the assembly.
+	/// @arg _sourceCodes is the map of input files to source code strings
+	/// Prerequisite: Successful compilation.
+	Json::Value assemblyJSON(std::string const& _contractName = "", StringMap _sourceCodes = StringMap()) const;
 
 	/// @returns a JSON representing the contract ABI.
 	/// Prerequisite: Successful call to parse or compile.
diff --git a/libsolidity/interface/StandardCompiler.cpp b/libsolidity/interface/StandardCompiler.cpp
index be823743..b4fbbef9 100644
--- a/libsolidity/interface/StandardCompiler.cpp
+++ b/libsolidity/interface/StandardCompiler.cpp
@@ -400,10 +400,8 @@ Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
 		// EVM
 		Json::Value evmData(Json::objectValue);
 		// @TODO: add ir
-		ostringstream tmp;
-		m_compilerStack.streamAssembly(tmp, contractName, createSourceList(_input), false);
-		evmData["assembly"] = tmp.str();
-		evmData["legacyAssembly"] = m_compilerStack.streamAssembly(tmp, contractName, createSourceList(_input), true);
+		evmData["assembly"] = m_compilerStack.assemblyString(contractName, createSourceList(_input));
+		evmData["legacyAssembly"] = m_compilerStack.assemblyJSON(contractName, createSourceList(_input));
 		evmData["methodIdentifiers"] = m_compilerStack.methodIdentifiers(contractName);
 		evmData["gasEstimates"] = m_compilerStack.gasEstimates(contractName);