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102 lines
2.1 KiB
102 lines
2.1 KiB
10 years ago
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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 CommonJS.cpp
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* @authors:
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* Gav Wood <i@gavwood.com>
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* Marek Kotewicz <marek@ethdev.com>
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* @date 2014
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*/
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#include "CommonJS.h"
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namespace dev
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{
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bytes jsToBytes(std::string const& _s)
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{
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if (_s.substr(0, 2) == "0x")
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// Hex
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return fromHex(_s.substr(2));
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else if (_s.find_first_not_of("0123456789") == std::string::npos)
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// Decimal
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return toCompactBigEndian(bigint(_s));
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else
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return bytes();
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}
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bytes padded(bytes _b, unsigned _l)
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{
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while (_b.size() < _l)
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_b.insert(_b.begin(), 0);
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return asBytes(asString(_b).substr(_b.size() - std::max(_l, _l)));
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}
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bytes paddedRight(bytes _b, unsigned _l)
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{
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_b.resize(_l);
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return _b;
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}
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bytes unpadded(bytes _b)
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{
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auto p = asString(_b).find_last_not_of((char)0);
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_b.resize(p == std::string::npos ? 0 : (p + 1));
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return _b;
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}
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bytes unpadLeft(bytes _b)
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{
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unsigned int i = 0;
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if (_b.size() == 0)
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return _b;
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while (i < _b.size() && _b[i] == byte(0))
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i++;
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if (i != 0)
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_b.erase(_b.begin(), _b.begin() + i);
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return _b;
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}
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std::string fromRaw(h256 _n, unsigned* _inc)
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{
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if (_n)
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{
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std::string s((char const*)_n.data(), 32);
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auto l = s.find_first_of('\0');
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if (!l)
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return "";
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if (l != std::string::npos)
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{
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auto p = s.find_first_not_of('\0', l);
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if (!(p == std::string::npos || (_inc && p == 31)))
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return "";
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if (_inc)
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*_inc = (byte)s[31];
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s.resize(l);
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}
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for (auto i: s)
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if (i < 32)
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return "";
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return s;
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}
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return "";
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}
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}
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