mirror of
https://github.com/paboyle/Grid.git
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287 lines
7.0 KiB
C++
287 lines
7.0 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/serialisation/BaseIO.h
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Copyright (C) 2015
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Author: Antonin Portelli <antonin.portelli@me.com>
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef GRID_SERIALISATION_ABSTRACT_READER_H
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#define GRID_SERIALISATION_ABSTRACT_READER_H
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#include <type_traits>
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namespace Grid {
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// helper function to read space-separated values
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template <typename T>
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std::vector<T> strToVec(const std::string s)
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{
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std::istringstream sstr(s);
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T buf;
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std::vector<T> v;
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while(!sstr.eof())
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{
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sstr >> buf;
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v.push_back(buf);
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}
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return v;
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}
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// output to streams for vectors
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template < class T >
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inline std::ostream & operator<<(std::ostream &os, const std::vector<T> &v)
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{
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os << "[";
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for (auto &x: v)
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{
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os << x << " ";
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}
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if (v.size() > 0)
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{
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os << "\b";
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}
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os << "]";
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return os;
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}
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class Serializable {};
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// static polymorphism implemented using CRTP idiom
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// Static abstract writer
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template <typename T>
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class Writer
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{
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public:
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Writer(void);
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virtual ~Writer(void) = default;
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void push(const std::string &s);
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void pop(void);
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template <typename U>
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typename std::enable_if<std::is_base_of<Serializable, U>::value, void>::type
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write(const std::string& s, const U &output);
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template <typename U>
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typename std::enable_if<std::is_enum<U>::value, void>::type
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write(const std::string& s, const U &output);
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template <typename U>
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typename std::enable_if<
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!(std::is_base_of<Serializable, U>::value or std::is_enum<U>::value),
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void>::type
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write(const std::string& s, const U &output);
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private:
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T *upcast;
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};
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// Static abstract reader
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template <typename T>
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class Reader
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{
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public:
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Reader(void);
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virtual ~Reader(void) = default;
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void push(const std::string &s);
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void pop(void);
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template <typename U>
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typename std::enable_if<std::is_base_of<Serializable, U>::value, void>::type
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read(const std::string& s, U &output);
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template <typename U>
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typename std::enable_if<std::is_enum<U>::value, void>::type
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read(const std::string& s, U &output);
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template <typename U>
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typename std::enable_if<
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!(std::is_base_of<Serializable, U>::value or std::is_enum<U>::value),
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void>::type
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read(const std::string& s, U &output);
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protected:
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template <typename U>
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void fromString(U &output, const std::string &s);
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private:
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T *upcast;
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};
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// Generic writer interface
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template <typename T>
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inline void push(Writer<T> &w, const std::string &s)
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{
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w.push(s);
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}
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template <typename T>
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inline void push(Writer<T> &w, const char *s)
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{
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w.push(std::string(s));
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}
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template <typename T>
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inline void pop(Writer<T> &w)
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{
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w.pop();
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}
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template <typename T, typename U>
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inline void write(Writer<T> &w, const std::string& s, const U &output)
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{
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w.write(s, output);
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}
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// Generic reader interface
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template <typename T>
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inline void push(Reader<T> &r, const std::string &s)
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{
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r.push(s);
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}
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template <typename T>
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inline void push(Reader<T> &r, const char *s)
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{
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r.push(std::string(s));
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}
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template <typename T>
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inline void pop(Reader<T> &r)
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{
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r.pop();
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}
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template <typename T, typename U>
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inline void read(Reader<T> &r, const std::string &s, U &output)
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{
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r.read(s, output);
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}
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// Writer template implementation ////////////////////////////////////////////
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template <typename T>
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Writer<T>::Writer(void)
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{
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upcast = static_cast<T *>(this);
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}
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template <typename T>
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void Writer<T>::push(const std::string &s)
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{
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upcast->push(s);
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}
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template <typename T>
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void Writer<T>::pop(void)
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{
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upcast->pop();
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}
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template <typename T>
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template <typename U>
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typename std::enable_if<std::is_base_of<Serializable, U>::value, void>::type
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Writer<T>::write(const std::string &s, const U &output)
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{
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U::write(*this, s, output);
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}
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template <typename T>
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template <typename U>
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typename std::enable_if<std::is_enum<U>::value, void>::type
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Writer<T>::write(const std::string &s, const U &output)
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{
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EnumIO<U>::write(*this, s, output);
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}
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template <typename T>
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template <typename U>
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typename std::enable_if<
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!(std::is_base_of<Serializable, U>::value or std::is_enum<U>::value),
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void>::type
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Writer<T>::write(const std::string &s, const U &output)
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{
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upcast->writeDefault(s, output);
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}
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// Reader template implementation ////////////////////////////////////////////
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template <typename T>
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Reader<T>::Reader(void)
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{
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upcast = static_cast<T *>(this);
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}
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template <typename T>
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void Reader<T>::push(const std::string &s)
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{
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upcast->push(s);
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}
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template <typename T>
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void Reader<T>::pop(void)
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{
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upcast->pop();
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}
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template <typename T>
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template <typename U>
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typename std::enable_if<std::is_base_of<Serializable, U>::value, void>::type
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Reader<T>::read(const std::string &s, U &output)
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{
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U::read(*this, s, output);
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}
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template <typename T>
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template <typename U>
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typename std::enable_if<std::is_enum<U>::value, void>::type
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Reader<T>::read(const std::string &s, U &output)
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{
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EnumIO<U>::read(*this, s, output);
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}
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template <typename T>
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template <typename U>
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typename std::enable_if<
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!(std::is_base_of<Serializable, U>::value or std::is_enum<U>::value),
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void>::type
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Reader<T>::read(const std::string &s, U &output)
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{
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upcast->readDefault(s, output);
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}
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template <typename T>
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template <typename U>
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void Reader<T>::fromString(U &output, const std::string &s)
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{
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std::istringstream is(s);
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is.exceptions(std::ios::failbit);
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try
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{
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is >> std::boolalpha >> output;
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}
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catch(std::istringstream::failure &e)
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{
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std::cerr << "numerical conversion failure on '" << s << "' ";
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std::cerr << "(typeid: " << typeid(U).name() << ")" << std::endl;
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abort();
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}
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}
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}
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#endif
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