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123 lines
4.0 KiB
123 lines
4.0 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 CommonJS.h
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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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#pragma once
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#include <string>
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#include "FixedHash.h"
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#include "CommonData.h"
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namespace dev
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{
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template <unsigned S> std::string toJS(FixedHash<S> const& _h)
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{
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return "0x" + toHex(_h.ref());
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}
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template <unsigned N> std::string toJS(boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N, N, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>> const& _n)
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{
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std::string h = toHex(toCompactBigEndian(_n, 1));
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// remove first 0, if it is necessary;
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std::string res = h[0] != '0' ? h : h.substr(1);
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return "0x" + res;
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}
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inline std::string toJS(bytes const& _n, std::size_t _padding = 0)
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{
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bytes n = _n;
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n.resize(std::max<unsigned>(n.size(), _padding));
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return "0x" + toHex(n);
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}
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template<unsigned T> std::string toJS(SecureFixedHash<T> const& _i)
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{
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std::stringstream stream;
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stream << "0x" << _i.makeInsecure().hex();
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return stream.str();
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}
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template<typename T> std::string toJS(T const& _i)
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{
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std::stringstream stream;
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stream << "0x" << std::hex << _i;
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return stream.str();
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}
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/// Convert string to byte array. Input parameters can be hex or dec. Returns empty array if invalid input e.g neither dec or hex.
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bytes jsToBytes(std::string const& _s);
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/// Add '0' on, or remove items from, the front of @a _b until it is of length @a _l.
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bytes padded(bytes _b, unsigned _l);
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/// Add '0' on, or remove items from, the back of @a _b until it is of length @a _l.
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bytes paddedRight(bytes _b, unsigned _l);
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/// Removing all trailing '0'. Returns empty array if input contains only '0' char.
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bytes unpadded(bytes _s);
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/// Remove all 0 byte on the head of @a _s.
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bytes unpadLeft(bytes _s);
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/// Convert h256 into user-readable string (by directly using std::string constructor).
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std::string fromRaw(h256 _n, unsigned* _inc = nullptr);
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template <unsigned N> FixedHash<N> jsToFixed(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 FixedHash<N>(_s.substr(2 + std::max<unsigned>(N * 2, _s.size() - 2) - N * 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 (typename FixedHash<N>::Arith)(_s);
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else
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// Binary
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return FixedHash<N>(); // FAIL
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}
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inline std::string jsToFixed(double _s)
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{
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return toJS(u256(_s * (double)(u256(1) << 128)));
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}
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template <unsigned N> boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>> jsToInt(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 fromBigEndian<boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>>>(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 boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>>(_s);
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else
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// Binary
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return 0; // FAIL
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}
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inline u256 jsToU256(std::string const& _s) { return jsToInt<32>(_s); }
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inline int jsToInt(std::string const& _s)
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{
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return std::stoi(_s, nullptr, 0);
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}
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inline std::string jsToDecimal(std::string const& _s)
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{
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return toString(jsToU256(_s));
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}
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}
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