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