/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see .
*/
/** @file CommonData.cpp
* @author Gav Wood
* @date 2014
*/
#include "CommonData.h"
#include "Exceptions.h"
using namespace std;
using namespace dev;
std::string dev::escaped(std::string const& _s, bool _all)
{
static const map prettyEscapes{{'\r', 'r'}, {'\n', 'n'}, {'\t', 't'}, {'\v', 'v'}};
std::string ret;
ret.reserve(_s.size() + 2);
ret.push_back('"');
for (auto i: _s)
if (i == '"' && !_all)
ret += "\\\"";
else if (i == '\\' && !_all)
ret += "\\\\";
else if (prettyEscapes.count(i) && !_all)
{
ret += '\\';
ret += prettyEscapes.find(i)->second;
}
else if (i < ' ' || _all)
{
ret += "\\x";
ret.push_back("0123456789abcdef"[(uint8_t)i / 16]);
ret.push_back("0123456789abcdef"[(uint8_t)i % 16]);
}
else
ret.push_back(i);
ret.push_back('"');
return ret;
}
int dev::fromHex(char _i, WhenError _throw)
{
if (_i >= '0' && _i <= '9')
return _i - '0';
if (_i >= 'a' && _i <= 'f')
return _i - 'a' + 10;
if (_i >= 'A' && _i <= 'F')
return _i - 'A' + 10;
if (_throw == WhenError::Throw)
BOOST_THROW_EXCEPTION(BadHexCharacter() << errinfo_invalidSymbol(_i));
else
return -1;
}
bytes dev::fromHex(std::string const& _s, WhenError _throw)
{
unsigned s = (_s.size() >= 2 && _s[0] == '0' && _s[1] == 'x') ? 2 : 0;
std::vector ret;
ret.reserve((_s.size() - s + 1) / 2);
if (_s.size() % 2)
{
int h = fromHex(_s[s++], WhenError::DontThrow);
if (h != -1)
ret.push_back(h);
else if (_throw == WhenError::Throw)
BOOST_THROW_EXCEPTION(BadHexCharacter());
else
return bytes();
}
for (unsigned i = s; i < _s.size(); i += 2)
{
int h = fromHex(_s[i], WhenError::DontThrow);
int l = fromHex(_s[i + 1], WhenError::DontThrow);
if (h != -1 && l != -1)
ret.push_back((byte)(h * 16 + l));
else if (_throw == WhenError::Throw)
BOOST_THROW_EXCEPTION(BadHexCharacter());
else
return bytes();
}
return ret;
}
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