mirror of https://github.com/oxen-io/oxen-core.git
98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
// Copyright (c) 2014-2018, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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#include <cstddef>
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#include <ios>
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#include <iostream>
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#include <type_traits>
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#include <vector>
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#include <oxenc/hex.h>
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template <typename Char>
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inline bool hexdecode(const Char *from, std::size_t length, void *to) {
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const Char* end = from + 2*length;
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if (!oxenc::is_hex(from, end))
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return false;
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oxenc::from_hex(from, end, reinterpret_cast<Char*>(to));
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return true;
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}
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inline void get(std::istream &input, bool &res) {
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std::string sres;
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input >> sres;
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if (sres == "false") {
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res = false;
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} else if (sres == "true") {
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res = true;
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} else {
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input.setstate(std::ios_base::failbit);
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}
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}
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template<typename T, std::enable_if_t<std::is_integral_v<T>, int> = 0>
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void get(std::istream &input, T &res) {
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input >> res;
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}
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inline void getvar(std::istream &input, std::size_t length, void *res) {
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std::string sres;
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input >> sres;
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if (sres.length() != 2 * length || !hexdecode(sres.data(), length, res)) {
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input.setstate(std::ios_base::failbit);
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}
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}
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template<typename T, std::enable_if_t<std::is_standard_layout_v<T> && !std::is_scalar_v<T>, int> = 0>
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void get(std::istream &input, T &res) {
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getvar(input, sizeof(T), &res);
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}
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template <typename Char, std::enable_if_t<sizeof(Char) == 1 && std::is_scalar_v<Char>, int> = 0>
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inline void get(std::istream &input, std::vector<Char> &res) {
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std::string sres;
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input >> sres;
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if (sres == "x") {
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res.clear();
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} else if (sres.length() % 2 != 0) {
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input.setstate(std::ios_base::failbit);
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} else {
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std::size_t length = sres.length() / 2;
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res.resize(length);
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if (!hexdecode(sres.data(), length, res.data())) {
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input.setstate(std::ios_base::failbit);
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}
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}
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}
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template<typename... T, std::enable_if_t<(sizeof...(T) >= 2), int> = 0>
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void get(std::istream &input, T&&... res) {
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(get(input, res), ...);
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}
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