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95 lines
2.3 KiB
95 lines
2.3 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 Common.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 "CommonData.h"
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#include <random>
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#include "Exceptions.h"
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using namespace std;
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using namespace eth;
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std::string eth::escaped(std::string const& _s, bool _all)
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{
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std::string ret;
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ret.reserve(_s.size());
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ret.push_back('"');
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for (auto i: _s)
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if (i == '"' && !_all)
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ret += "\\\"";
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else if (i == '\\' && !_all)
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ret += "\\\\";
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else if (i < ' ' || _all)
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{
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ret += "\\x";
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ret.push_back("0123456789abcdef"[(uint8_t)i / 16]);
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ret.push_back("0123456789abcdef"[(uint8_t)i % 16]);
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}
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else
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ret.push_back(i);
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ret.push_back('"');
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return ret;
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}
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std::string eth::randomWord()
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{
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static std::mt19937_64 s_eng(0);
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std::string ret(std::uniform_int_distribution<int>(4, 10)(s_eng), ' ');
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char const n[] = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890";
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std::uniform_int_distribution<int> d(0, sizeof(n) - 2);
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for (char& c: ret)
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c = n[d(s_eng)];
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return ret;
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}
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int eth::fromHex(char _i)
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{
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if (_i >= '0' && _i <= '9')
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return _i - '0';
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if (_i >= 'a' && _i <= 'f')
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return _i - 'a' + 10;
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if (_i >= 'A' && _i <= 'F')
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return _i - 'A' + 10;
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throw BadHexCharacter();
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}
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bytes eth::fromHex(std::string const& _s)
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{
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if (_s.size() % 2 || _s.size() < 2)
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return bytes();
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uint s = (_s[0] == '0' && _s[1] == 'x') ? 2 : 0;
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std::vector<uint8_t> ret;
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ret.reserve((_s.size() - s) / 2);
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for (uint i = s; i < _s.size(); i += 2)
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ret.push_back((byte)(fromHex(_s[i]) * 16 + fromHex(_s[i + 1])));
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return ret;
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}
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bytes eth::asNibbles(std::string const& _s)
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{
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std::vector<uint8_t> ret;
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ret.reserve(_s.size() * 2);
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for (auto i: _s)
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{
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ret.push_back(i / 16);
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ret.push_back(i % 16);
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}
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return ret;
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}
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