solidity/libsolc/libsolc.cpp
2019-12-12 11:26:16 +00:00

159 lines
4.1 KiB
C++

/*
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
* Public compiler API.
*/
#include <libsolc/libsolc.h>
#include <libsolidity/interface/StandardCompiler.h>
#include <libsolidity/interface/Version.h>
#include <libyul/YulString.h>
#include <libdevcore/Common.h>
#include <libdevcore/JSON.h>
#include <cstdlib>
#include <list>
#include <string>
#include "license.h"
using namespace std;
using namespace dev;
using namespace solidity;
namespace
{
// The strings in this list must not be resized after they have been added here (via solidity_alloc()), because
// this may potentially change the pointer that was passed to the caller from solidity_alloc().
static list<string> solidityAllocations;
/// Find the equivalent to @p _data in the list of allocations of solidity_alloc(),
/// removes it from the list and returns its value.
///
/// If any invalid argument is being passed, it is considered a programming error
/// on the caller-side and hence, will call abort() then.
string takeOverAllocation(char const* _data)
{
for (auto iter = begin(solidityAllocations); iter != end(solidityAllocations); ++iter)
if (iter->data() == _data)
{
string chunk = move(*iter);
solidityAllocations.erase(iter);
return chunk;
}
abort();
}
/// Resizes a std::string to the proper length based on the occurrence of a zero terminator.
void truncateCString(string& _data)
{
size_t pos = _data.find('\0');
if (pos != string::npos)
_data.resize(pos);
}
ReadCallback::Callback wrapReadCallback(CStyleReadFileCallback _readCallback, void* _readContext)
{
ReadCallback::Callback readCallback;
if (_readCallback)
{
readCallback = [=](string const& _kind, string const& _data)
{
char* contents_c = nullptr;
char* error_c = nullptr;
_readCallback(_readContext, _kind.data(), _data.data(), &contents_c, &error_c);
ReadCallback::Result result;
result.success = true;
if (!contents_c && !error_c)
{
result.success = false;
result.responseOrErrorMessage = "Callback not supported.";
}
if (contents_c)
{
result.success = true;
result.responseOrErrorMessage = takeOverAllocation(contents_c);
}
if (error_c)
{
result.success = false;
result.responseOrErrorMessage = takeOverAllocation(error_c);
}
truncateCString(result.responseOrErrorMessage);
return result;
};
}
return readCallback;
}
string compile(string _input, CStyleReadFileCallback _readCallback, void* _readContext)
{
StandardCompiler compiler(wrapReadCallback(_readCallback, _readContext));
return compiler.compile(move(_input));
}
}
extern "C"
{
extern char const* solidity_license() noexcept
{
static string fullLicenseText = otherLicenses + licenseText;
return fullLicenseText.c_str();
}
extern char const* solidity_version() noexcept
{
return VersionString.c_str();
}
extern char* solidity_compile(char const* _input, CStyleReadFileCallback _readCallback, void* _readContext) noexcept
{
return solidityAllocations.emplace_back(compile(_input, _readCallback, _readContext)).data();
}
extern char* solidity_alloc(size_t _size) noexcept
{
try
{
return solidityAllocations.emplace_back(_size, '\0').data();
}
catch (...)
{
// most likely a std::bad_alloc(), if at all.
return nullptr;
}
}
extern void solidity_free(char* _data) noexcept
{
takeOverAllocation(_data);
}
extern void solidity_reset() noexcept
{
// This is called right before each compilation, but not at the end, so additional memory
// can be freed here.
yul::YulStringRepository::reset();
solidityAllocations.clear();
}
}