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270 lines
10 KiB
270 lines
10 KiB
/*
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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.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*
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* File & stream I/O routines.
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*/
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#pragma once
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#include <map>
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#include <set>
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#include <unordered_map>
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#include <unordered_set>
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#include <array>
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#include <list>
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#include <memory>
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#include <vector>
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#include <array>
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#include <sstream>
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#include <string>
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#include <iostream>
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#include <chrono>
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#include "Common.h"
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#include "Base64.h"
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namespace dev
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{
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/// Requests the user to enter a password on the console.
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std::string getPassword(std::string const& _prompt);
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/// Retrieve and returns the contents of the given file.
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/// If the file doesn't exist or isn't readable, returns an empty container / bytes.
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bytes contents(std::string const& _file);
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/// Secure variation.
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bytesSec contentsSec(std::string const& _file);
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/// Retrieve and returns the contents of the given file as a std::string.
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/// If the file doesn't exist or isn't readable, returns an empty container / bytes.
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std::string contentsString(std::string const& _file);
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/// Retrieve and returns the allocated contents of the given file; if @_dest is given, don't allocate, use it directly.
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/// If the file doesn't exist or isn't readable, returns bytesRef(). Don't forget to delete [] the returned value's data when finished.
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bytesRef contentsNew(std::string const& _file, bytesRef _dest = bytesRef());
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/// Write the given binary data into the given file, replacing the file if it pre-exists.
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/// Throws exception on error.
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/// @param _writeDeleteRename useful not to lose any data: If set, first writes to another file in
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/// the same directory and then moves that file.
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void writeFile(std::string const& _file, bytesConstRef _data, bool _writeDeleteRename = false);
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/// Write the given binary data into the given file, replacing the file if it pre-exists.
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inline void writeFile(std::string const& _file, bytes const& _data, bool _writeDeleteRename = false) { writeFile(_file, bytesConstRef(&_data), _writeDeleteRename); }
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inline void writeFile(std::string const& _file, std::string const& _data, bool _writeDeleteRename = false) { writeFile(_file, bytesConstRef(_data), _writeDeleteRename); }
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/// Nicely renders the given bytes to a string, optionally as HTML.
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/// @a _bytes: bytes array to be rendered as string. @a _width of a bytes line.
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std::string memDump(bytes const& _bytes, unsigned _width = 8, bool _html = false);
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// Stream I/O functions.
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// Provides templated stream I/O for all STL collections so they can be shifted on to any iostream-like interface.
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template <class S, class T> struct StreamOut { static S& bypass(S& _out, T const& _t) { _out << _t; return _out; } };
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template <class S> struct StreamOut<S, uint8_t> { static S& bypass(S& _out, uint8_t const& _t) { _out << (int)_t; return _out; } };
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::vector<T> const& _e);
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template <class T, std::size_t Z> inline std::ostream& operator<<(std::ostream& _out, std::array<T, Z> const& _e);
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::pair<T, U> const& _e);
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::list<T> const& _e);
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template <class T1, class T2, class T3> inline std::ostream& operator<<(std::ostream& _out, std::tuple<T1, T2, T3> const& _e);
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::map<T, U> const& _e);
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::unordered_map<T, U> const& _e);
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::set<T, U> const& _e);
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::unordered_set<T, U> const& _e);
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::multimap<T, U> const& _e);
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template <class _S, class _T> _S& operator<<(_S& _out, std::shared_ptr<_T> const& _p);
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#ifdef _WIN32
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template <class T> inline std::string toString(std::chrono::time_point<T> const& _e, std::string _format = "%Y-%m-%d %H:%M:%S")
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#else
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template <class T> inline std::string toString(std::chrono::time_point<T> const& _e, std::string _format = "%F %T")
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#endif
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{
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unsigned long milliSecondsSinceEpoch = std::chrono::duration_cast<std::chrono::milliseconds>(_e.time_since_epoch()).count();
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auto const durationSinceEpoch = std::chrono::milliseconds(milliSecondsSinceEpoch);
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std::chrono::time_point<std::chrono::system_clock> const tpAfterDuration(durationSinceEpoch);
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tm timeValue;
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auto time = std::chrono::system_clock::to_time_t(tpAfterDuration);
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#ifdef _WIN32
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gmtime_s(&timeValue, &time);
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#else
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gmtime_r(&time, &timeValue);
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#endif
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unsigned const millisRemainder = milliSecondsSinceEpoch % 1000;
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char buffer[1024];
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if (strftime(buffer, sizeof(buffer), _format.c_str(), &timeValue))
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return std::string(buffer) + "." + (millisRemainder < 1 ? "000" : millisRemainder < 10 ? "00" : millisRemainder < 100 ? "0" : "") + std::to_string(millisRemainder) + "Z";
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return std::string();
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}
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template <class S, class T>
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inline S& streamout(S& _out, std::vector<T> const& _e)
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{
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_out << "[";
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if (!_e.empty())
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{
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StreamOut<S, T>::bypass(_out, _e.front());
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for (auto i = ++_e.begin(); i != _e.end(); ++i)
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StreamOut<S, T>::bypass(_out << ",", *i);
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}
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_out << "]";
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return _out;
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}
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::vector<T> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T, std::size_t Z>
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inline S& streamout(S& _out, std::array<T, Z> const& _e)
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{
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_out << "[";
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if (!_e.empty())
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{
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StreamOut<S, T>::bypass(_out, _e.front());
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auto i = _e.begin();
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for (++i; i != _e.end(); ++i)
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StreamOut<S, T>::bypass(_out << ",", *i);
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}
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_out << "]";
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return _out;
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}
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template <class T, std::size_t Z> inline std::ostream& operator<<(std::ostream& _out, std::array<T, Z> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T>
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inline S& streamout(S& _out, std::list<T> const& _e)
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{
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_out << "[";
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if (!_e.empty())
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{
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_out << _e.front();
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for (auto i = ++_e.begin(); i != _e.end(); ++i)
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_out << "," << *i;
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}
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_out << "]";
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return _out;
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}
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::list<T> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T, class U>
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inline S& streamout(S& _out, std::pair<T, U> const& _e)
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{
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_out << "(" << _e.first << "," << _e.second << ")";
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return _out;
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}
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::pair<T, U> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T1, class T2, class T3>
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inline S& streamout(S& _out, std::tuple<T1, T2, T3> const& _t)
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{
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_out << "(" << std::get<0>(_t) << "," << std::get<1>(_t) << "," << std::get<2>(_t) << ")";
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return _out;
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}
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template <class T1, class T2, class T3> inline std::ostream& operator<<(std::ostream& _out, std::tuple<T1, T2, T3> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T, class U>
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S& streamout(S& _out, std::map<T, U> const& _v)
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{
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if (_v.empty())
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return _out << "{}";
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int i = 0;
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for (auto p: _v)
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_out << (!(i++) ? "{ " : "; ") << p.first << " => " << p.second;
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return _out << " }";
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}
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::map<T, U> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T, class U>
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S& streamout(S& _out, std::unordered_map<T, U> const& _v)
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{
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if (_v.empty())
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return _out << "{}";
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int i = 0;
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for (auto p: _v)
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_out << (!(i++) ? "{ " : "; ") << p.first << " => " << p.second;
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return _out << " }";
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}
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::unordered_map<T, U> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T>
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S& streamout(S& _out, std::set<T> const& _v)
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{
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if (_v.empty())
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return _out << "{}";
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int i = 0;
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for (auto p: _v)
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_out << (!(i++) ? "{ " : ", ") << p;
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return _out << " }";
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}
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::set<T> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T>
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S& streamout(S& _out, std::unordered_set<T> const& _v)
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{
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if (_v.empty())
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return _out << "{}";
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int i = 0;
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for (auto p: _v)
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_out << (!(i++) ? "{ " : ", ") << p;
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return _out << " }";
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}
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::unordered_set<T> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T>
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S& streamout(S& _out, std::multiset<T> const& _v)
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{
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if (_v.empty())
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return _out << "{}";
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int i = 0;
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for (auto p: _v)
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_out << (!(i++) ? "{ " : ", ") << p;
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return _out << " }";
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}
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template <class T> inline std::ostream& operator<<(std::ostream& _out, std::multiset<T> const& _e) { streamout(_out, _e); return _out; }
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template <class S, class T, class U>
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S& streamout(S& _out, std::multimap<T, U> const& _v)
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{
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if (_v.empty())
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return _out << "{}";
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T l;
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int i = 0;
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for (auto p: _v)
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if (!(i++))
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_out << "{ " << (l = p.first) << " => " << p.second;
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else if (l == p.first)
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_out << ", " << p.second;
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else
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_out << "; " << (l = p.first) << " => " << p.second;
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return _out << " }";
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}
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template <class T, class U> inline std::ostream& operator<<(std::ostream& _out, std::multimap<T, U> const& _e) { streamout(_out, _e); return _out; }
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template <class _S, class _T> _S& operator<<(_S& _out, std::shared_ptr<_T> const& _p) { if (_p) _out << "@" << (*_p); else _out << "nullptr"; return _out; }
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// Functions that use streaming stuff.
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/// Converts arbitrary value to string representation using std::stringstream.
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template <class _T>
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std::string toString(_T const& _t)
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{
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std::ostringstream o;
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o << _t;
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return o.str();
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}
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}
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