mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
134 lines
3.4 KiB
C++
134 lines
3.4 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file CommonData.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 <libdevcore/CommonData.h>
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#include <libdevcore/Exceptions.h>
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#include <libdevcore/SHA3.h>
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#include <boost/algorithm/string.hpp>
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using namespace std;
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using namespace dev;
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std::string dev::escaped(std::string const& _s, bool _all)
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{
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static const map<char, char> prettyEscapes{{'\r', 'r'}, {'\n', 'n'}, {'\t', 't'}, {'\v', 'v'}};
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std::string ret;
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ret.reserve(_s.size() + 2);
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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 (prettyEscapes.count(i) && !_all)
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{
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ret += '\\';
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ret += prettyEscapes.find(i)->second;
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}
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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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int dev::fromHex(char _i, WhenError _throw)
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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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if (_throw == WhenError::Throw)
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BOOST_THROW_EXCEPTION(BadHexCharacter() << errinfo_invalidSymbol(_i));
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else
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return -1;
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}
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bytes dev::fromHex(std::string const& _s, WhenError _throw)
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{
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unsigned s = (_s.size() >= 2 && _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 + 1) / 2);
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if (_s.size() % 2)
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{
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int h = fromHex(_s[s++], WhenError::DontThrow);
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if (h != -1)
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ret.push_back(h);
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else if (_throw == WhenError::Throw)
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BOOST_THROW_EXCEPTION(BadHexCharacter());
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else
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return bytes();
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}
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for (unsigned i = s; i < _s.size(); i += 2)
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{
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int h = fromHex(_s[i], WhenError::DontThrow);
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int l = fromHex(_s[i + 1], WhenError::DontThrow);
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if (h != -1 && l != -1)
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ret.push_back((byte)(h * 16 + l));
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else if (_throw == WhenError::Throw)
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BOOST_THROW_EXCEPTION(BadHexCharacter());
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else
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return bytes();
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}
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return ret;
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}
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bool dev::passesAddressChecksum(string const& _str, bool _strict)
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{
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string s = _str.substr(0, 2) == "0x" ? _str.substr(2) : _str;
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if (s.length() != 40)
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return false;
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if (!_strict && (
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_str.find_first_of("abcdef") == string::npos ||
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_str.find_first_of("ABCDEF") == string::npos
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))
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return true;
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h256 hash = keccak256(boost::algorithm::to_lower_copy(s, std::locale::classic()));
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for (size_t i = 0; i < 40; ++i)
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{
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char addressCharacter = s[i];
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bool lowerCase;
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if ('a' <= addressCharacter && addressCharacter <= 'f')
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lowerCase = true;
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else if ('A' <= addressCharacter && addressCharacter <= 'F')
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lowerCase = false;
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else
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continue;
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unsigned nibble = (unsigned(hash[i / 2]) >> (4 * (1 - (i % 2)))) & 0xf;
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if ((nibble >= 8) == lowerCase)
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return false;
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}
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return true;
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}
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