/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* JSON interface for the solidity compiler to be used from Javascript.
*/
#include <string>
#include <functional>
#include <iostream>
#include <json/json.h>
#include <libdevcore/Common.h>
#include <libdevcore/CommonData.h>
#include <libdevcore/CommonIO.h>
#include <libdevcore/JSON.h>
#include <libevmasm/Instruction.h>
#include <libevmasm/GasMeter.h>
#include <libsolidity/parsing/Scanner.h>
#include <libsolidity/parsing/Parser.h>
#include <libsolidity/ast/ASTPrinter.h>
#include <libsolidity/analysis/NameAndTypeResolver.h>
#include <libsolidity/interface/Exceptions.h>
#include <libsolidity/interface/CompilerStack.h>
#include <libsolidity/interface/StandardCompiler.h>
#include <libsolidity/interface/SourceReferenceFormatter.h>
#include <libsolidity/ast/ASTJsonConverter.h>
#include <libsolidity/interface/Version.h>
using namespace std;
using namespace dev;
using namespace solidity;
extern "C" {
/// Callback used to retrieve additional source files. "Returns" two pointers that should be
/// heap-allocated and are free'd by the caller.
typedef void (*CStyleReadFileCallback)(char const* _path, char** o_contents, char** o_error);
}
ReadFile::Callback wrapReadCallback(CStyleReadFileCallback _readCallback = nullptr)
{
ReadFile::Callback readCallback;
if (_readCallback)
{
readCallback = [=](string const& _path)
{
char* contents_c = nullptr;
char* error_c = nullptr;
_readCallback(_path.c_str(), &contents_c, &error_c);
ReadFile::Result result;
result.success = true;
if (!contents_c && !error_c)
{
result.success = false;
result.contentsOrErrorMessage = "File not found.";
}
if (contents_c)
{
result.success = true;
result.contentsOrErrorMessage = string(contents_c);
free(contents_c);
}
if (error_c)
{
result.success = false;
result.contentsOrErrorMessage = string(error_c);
free(error_c);
}
return result;
};
}
return readCallback;
}
Json::Value functionHashes(ContractDefinition const& _contract)
{
Json::Value functionHashes(Json::objectValue);
for (auto const& it: _contract.interfaceFunctions())
functionHashes[it.second->externalSignature()] = toHex(it.first.ref());
return functionHashes;
}
/// Translates a gas value as a string to a JSON number or null
Json::Value gasToJson(Json::Value const& _value)
{
if (_value.isObject())
{
Json::Value ret = Json::objectValue;
for (auto const& sig: _value.getMemberNames())
ret[sig] = gasToJson(_value[sig]);
return ret;
}
if (_value == "infinite")
return Json::Value(Json::nullValue);
u256 value(_value.asString());
if (value > std::numeric_limits<Json::LargestUInt>::max())
return Json::Value(Json::nullValue);
else
return Json::Value(Json::LargestUInt(value));
}
Json::Value estimateGas(CompilerStack const& _compiler, string const& _contract)
{
Json::Value estimates = _compiler.gasEstimates(_contract);
Json::Value output(Json::objectValue);
if (estimates["creation"].isObject())
{
Json::Value creation(Json::arrayValue);
creation[0] = gasToJson(estimates["creation"]["executionCost"]);
creation[1] = gasToJson(estimates["creation"]["codeDepositCost"]);
output["creation"] = creation;
}
else
output["creation"] = Json::objectValue;
output["external"] = gasToJson(estimates.get("external", Json::objectValue));
output["internal"] = gasToJson(estimates.get("internal", Json::objectValue));
return output;
}
string compile(StringMap const& _sources, bool _optimize, CStyleReadFileCallback _readCallback)
{
Json::Value output(Json::objectValue);
Json::Value errors(Json::arrayValue);
CompilerStack compiler(wrapReadCallback(_readCallback));
auto scannerFromSourceName = [&](string const& _sourceName) -> solidity::Scanner const& { return compiler.scanner(_sourceName); };
bool success = false;
try
{
compiler.addSources(_sources);
bool succ = compiler.compile(_optimize);
for (auto const& error: compiler.errors())
{
auto err = dynamic_pointer_cast<Error const>(error);
errors.append(SourceReferenceFormatter::formatExceptionInformation(
*error,
(err->type() == Error::Type::Warning) ? "Warning" : "Error",
scannerFromSourceName
));
}
success = succ; // keep success false on exception
}
catch (Error const& error)
{
errors.append(SourceReferenceFormatter::formatExceptionInformation(error, error.typeName(), scannerFromSourceName));
}
catch (CompilerError const& exception)
{
errors.append(SourceReferenceFormatter::formatExceptionInformation(exception, "Compiler error (" + exception.lineInfo() + ")", scannerFromSourceName));
}
catch (InternalCompilerError const& exception)
{
errors.append(SourceReferenceFormatter::formatExceptionInformation(exception, "Internal compiler error (" + exception.lineInfo() + ")", scannerFromSourceName));
}
catch (UnimplementedFeatureError const& exception)
{
errors.append(SourceReferenceFormatter::formatExceptionInformation(exception, "Unimplemented feature (" + exception.lineInfo() + ")", scannerFromSourceName));
}
catch (Exception const& exception)
{
errors.append("Exception during compilation: " + boost::diagnostic_information(exception));
}
catch (...)
{
errors.append("Unknown exception during compilation.");
}
if (errors.size() > 0)
output["errors"] = errors;
if (success)
{
try
{
output["contracts"] = Json::Value(Json::objectValue);
for (string const& contractName: compiler.contractNames())
{
Json::Value contractData(Json::objectValue);
contractData["interface"] = dev::jsonCompactPrint(compiler.interface(contractName));
contractData["bytecode"] = compiler.object(contractName).toHex();
contractData["runtimeBytecode"] = compiler.runtimeObject(contractName).toHex();
contractData["opcodes"] = solidity::disassemble(compiler.object(contractName).bytecode);
contractData["metadata"] = compiler.onChainMetadata(contractName);
contractData["functionHashes"] = functionHashes(compiler.contractDefinition(contractName));
contractData["gasEstimates"] = estimateGas(compiler, contractName);
auto sourceMap = compiler.sourceMapping(contractName);
contractData["srcmap"] = sourceMap ? *sourceMap : "";
auto runtimeSourceMap = compiler.runtimeSourceMapping(contractName);
contractData["srcmapRuntime"] = runtimeSourceMap ? *runtimeSourceMap : "";
ostringstream unused;
contractData["assembly"] = compiler.streamAssembly(unused, contractName, _sources, true);
output["contracts"][contractName] = contractData;
}
}
catch (...)
{
output["errors"].append("Unknown exception while generating contract data output.");
}
try
{
// Do not taint the internal error list
ErrorList formalErrors;
if (compiler.prepareFormalAnalysis(&formalErrors))
output["formal"]["why3"] = compiler.formalTranslation();
if (!formalErrors.empty())
{
Json::Value errors(Json::arrayValue);
for (auto const& error: formalErrors)
errors.append(SourceReferenceFormatter::formatExceptionInformation(
*error,
(error->type() == Error::Type::Warning) ? "Warning" : "Error",
scannerFromSourceName
));
output["formal"]["errors"] = errors;
}
}
catch (...)
{
output["errors"].append("Unknown exception while generating formal method output.");
}
try
{
// Indices into this array are used to abbreviate source names in source locations.
output["sourceList"] = Json::Value(Json::arrayValue);
for (auto const& source: compiler.sourceNames())
output["sourceList"].append(source);
output["sources"] = Json::Value(Json::objectValue);
for (auto const& source: compiler.sourceNames())
output["sources"][source]["AST"] = ASTJsonConverter(compiler.ast(source), compiler.sourceIndices()).json();
}
catch (...)
{
output["errors"].append("Unknown exception while generating source name output.");
}
}
try
{
return dev::jsonCompactPrint(output);
}
catch (...)
{
return "{\"errors\":[\"Unknown error while generating JSON.\"]}";
}
}
string compileMulti(string const& _input, bool _optimize, CStyleReadFileCallback _readCallback = nullptr)
{
Json::Reader reader;
Json::Value input;
if (!reader.parse(_input, input, false))
{
Json::Value errors(Json::arrayValue);
errors.append("Error parsing input JSON: " + reader.getFormattedErrorMessages());
Json::Value output(Json::objectValue);
output["errors"] = errors;
return dev::jsonCompactPrint(output);
}
else
{
StringMap sources;
Json::Value jsonSources = input["sources"];
if (jsonSources.isObject())
for (auto const& sourceName: jsonSources.getMemberNames())
sources[sourceName] = jsonSources[sourceName].asString();
return compile(sources, _optimize, _readCallback);
}
}
string compileSingle(string const& _input, bool _optimize)
{
StringMap sources;
sources[""] = _input;
return compile(sources, _optimize, nullptr);
}
string compileStandardInternal(string const& _input, CStyleReadFileCallback _readCallback = nullptr)
{
StandardCompiler compiler(wrapReadCallback(_readCallback));
return compiler.compile(_input);
}
static string s_outputBuffer;
extern "C"
{
extern char const* version()
{
return VersionString.c_str();
}
extern char const* compileJSON(char const* _input, bool _optimize)
{
s_outputBuffer = compileSingle(_input, _optimize);
return s_outputBuffer.c_str();
}
extern char const* compileJSONMulti(char const* _input, bool _optimize)
{
s_outputBuffer = compileMulti(_input, _optimize);
return s_outputBuffer.c_str();
}
extern char const* compileJSONCallback(char const* _input, bool _optimize, CStyleReadFileCallback _readCallback)
{
s_outputBuffer = compileMulti(_input, _optimize, _readCallback);
return s_outputBuffer.c_str();
}
extern char const* compileStandard(char const* _input, CStyleReadFileCallback _readCallback)
{
s_outputBuffer = compileStandardInternal(_input, _readCallback);
return s_outputBuffer.c_str();
}
}
