108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
// Copyright (c) 2012-2013 The Cryptonote developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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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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inline bool hexdecode(const char *from, std::size_t length, void *to) {
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std::size_t i;
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for (i = 0; i < length; i++) {
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int v = 0;
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if (from[2 * i] >= '0' && from[2 * i] <= '9') {
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v = from[2 * i] - '0';
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} else if (from[2 * i] >= 'a' && from[2 * i] <= 'f') {
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v = from[2 * i] - 'a' + 10;
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} else {
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return false;
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}
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v <<= 4;
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if (from[2 * i + 1] >= '0' && from[2 * i + 1] <= '9') {
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v |= from[2 * i + 1] - '0';
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} else if (from[2 * i + 1] >= 'a' && from[2 * i + 1] <= 'f') {
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v |= from[2 * i + 1] - 'a' + 10;
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} else {
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return false;
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}
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*(reinterpret_cast<unsigned char *>(to) + i) = v;
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}
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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>
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typename std::enable_if<std::is_integral<T>::value, void>::type
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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>
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typename std::enable_if<std::is_standard_layout<T>::value && !std::is_scalar<T>::value, void>::type
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get(std::istream &input, T &res) {
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getvar(input, sizeof(T), &res);
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}
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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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#if !defined(_MSC_VER) || _MSC_VER >= 1800
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template<typename T, typename... TT>
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typename std::enable_if<(sizeof...(TT) > 0), void>::type
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get(std::istream &input, T &res, TT &... resres) {
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get(input, res);
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get(input, resres...);
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}
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#else
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/repetition/enum_binary_params.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#define NESTED_GET(z, n, data) get(input, BOOST_PP_CAT(res, n));
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#define GET(z, n, data) \
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template<BOOST_PP_ENUM_PARAMS(n, typename T)> \
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void get(std::istream &input, BOOST_PP_ENUM_BINARY_PARAMS(n, T, &res)) { \
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BOOST_PP_REPEAT(n, NESTED_GET, ~) \
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}
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BOOST_PP_REPEAT_FROM_TO(2, 5, GET, ~)
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#endif
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