mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
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/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file CommonIO.cpp
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#include "CommonIO.h"
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#include <iostream>
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#include <cstdlib>
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#include <fstream>
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#include <stdio.h>
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#if defined(_WIN32)
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#include <windows.h>
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#else
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#include <termios.h>
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#endif
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#include <boost/filesystem.hpp>
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#include "Exceptions.h"
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using namespace std;
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using namespace dev;
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template <typename _T>
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inline _T contentsGeneric(std::string const& _file)
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{
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_T ret;
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size_t const c_elementSize = sizeof(typename _T::value_type);
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std::ifstream is(_file, std::ifstream::binary);
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if (!is)
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return ret;
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// get length of file:
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is.seekg(0, is.end);
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streamoff length = is.tellg();
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if (length == 0)
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return ret; // do not read empty file (MSVC does not like it)
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is.seekg(0, is.beg);
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ret.resize((length + c_elementSize - 1) / c_elementSize);
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is.read(const_cast<char*>(reinterpret_cast<char const*>(ret.data())), length);
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return ret;
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}
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string dev::contentsString(string const& _file)
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{
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return contentsGeneric<string>(_file);
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}
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void dev::writeFile(std::string const& _file, bytesConstRef _data, bool _writeDeleteRename)
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{
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namespace fs = boost::filesystem;
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if (_writeDeleteRename)
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{
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fs::path tempPath = fs::unique_path(_file + "-%%%%%%");
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writeFile(tempPath.string(), _data, false);
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// will delete _file if it exists
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fs::rename(tempPath, _file);
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}
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else
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{
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// create directory if not existent
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fs::path p(_file);
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if (!fs::exists(p.parent_path()))
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{
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fs::create_directories(p.parent_path());
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DEV_IGNORE_EXCEPTIONS(fs::permissions(p.parent_path(), fs::owner_all));
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}
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ofstream s(_file, ios::trunc | ios::binary);
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s.write(reinterpret_cast<char const*>(_data.data()), _data.size());
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if (!s)
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BOOST_THROW_EXCEPTION(FileError() << errinfo_comment("Could not write to file: " + _file));
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DEV_IGNORE_EXCEPTIONS(fs::permissions(_file, fs::owner_read|fs::owner_write));
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}
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}
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