BinaryFileOArchive.h

#ifndef UTIL_BINARY_FILE_O_ARCHIVE_H
#define UTIL_BINARY_FILE_O_ARCHIVE_H
 
/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/
 
#include "Byte.h"
#include "serialize.h"
 
#include <util/space/Vector.h>
#include <util/space/IntVector.h>
 
#include <complex>
#include <vector>
#include <string>
#include <iostream>
 
namespace Util
{

   class BinaryFileOArchive
   {
 
   public:

      static bool is_saving();

      static bool is_loading();

      BinaryFileOArchive();

      BinaryFileOArchive(std::string filename);

      BinaryFileOArchive(std::ofstream& file);

      virtual ~BinaryFileOArchive();

      std::ofstream& file();
 
      // Overloaded << (insertion) and & operators

      template <typename T>
      BinaryFileOArchive& operator << (T& data);

      template <typename T>
      BinaryFileOArchive& operator & (T& data);

      template <typename T, size_t N>
      BinaryFileOArchive& operator << (T (& data)[N]);

      template <typename T, size_t N>
      BinaryFileOArchive& operator & (T (& data)[N]);
 
      // Pack functions and function templates 

      template <typename T> 
      void pack(const T& data);

      template <typename T> 
      void pack(const T* array, int n);

      template <typename T> 
      void pack(const T* array, int m, int n, int np);
 
   private:

      std::ofstream* filePtr_;

      unsigned int  version_;

      bool createdFile_;
 
   };
 
   // Inline static member functions
 
   inline bool BinaryFileOArchive::is_saving()
   {  return true; }
 
   inline bool BinaryFileOArchive::is_loading()
   {  return false; }
 
   // Overloaded << and & operators
 
   /*
   * Save (write) one object to this archive via the << operator.
   */
   template <typename T>
   inline BinaryFileOArchive& BinaryFileOArchive::operator << (T& data)
   {  
      serialize(*this, data, version_);
      return *this;
   }
 
   /*
   * Write one object.
   */
   template <typename T>
   inline BinaryFileOArchive& BinaryFileOArchive::operator & (T& data)
   {   
      serialize(*this, data, version_); 
      return *this;
   }
 
   /*
   * Save a fixed size array of objects via operator <<.
   */
   template <typename T, size_t N>
   inline BinaryFileOArchive& BinaryFileOArchive::operator << (T (&data)[N])
   {
      for (size_t i=0; i < N; ++i) {   
         serialize(*this, data[i], version_); 
      }
      return *this;
   }
 
   /*
   * Save a fixed size array of objects via operator &.
   */
   template <typename T, size_t N>
   inline BinaryFileOArchive& BinaryFileOArchive::operator & (T (&data)[N])
   {
      for (size_t i=0; i < N; ++i) {
         serialize(*this, data[i], version_); 
      }
      return *this;
   }
 
   // Method templates
 
   /*
   * Bitwise pack a single object of type T.
   */
   template <typename T>
   inline void BinaryFileOArchive::pack(const T& data)
   {  filePtr_->write( (char*)(&data), sizeof(T)); }
 
   /*
   * Bitwise pack a C-array of objects of type T.
   */
   template <typename T>
   inline void BinaryFileOArchive::pack(const T* array, int n)
   {
      for (int i=0; i < n; ++i) {
         filePtr_->write( (char*)(&array[i]), sizeof(T));
      }
   }
 
   /*
   * Bitwise pack a 2D C-array of objects of type T.
   */
   template <typename T>
   inline void BinaryFileOArchive::pack(const T* array, int m, int n, int np)
   {
      int i, j;
      for (i=0; i < m; ++i) {
         for (j=0; j < n; ++j) {
            filePtr_->write( (char*)(&array[i*np + j]), sizeof(T));
         }
      }
   }
 
   // Explicit serialize functions for primitive types
 
   /*
   * Save a bool to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, bool& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save a char to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, char& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save an unsigned int to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, unsigned int& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save an int to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, int& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save an unsigned long int to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, unsigned long& data,  
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save a long int to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, long& data,  
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save a float to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, float& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save an double to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, double& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save a std::complex<double> to a BinaryFileOArchive.
   */
   template <typename T>
   void serialize(BinaryFileOArchive& ar, std::vector<T>& data, 
                  const unsigned int version)
   {
      size_t size = data.size();
      ar.pack(size);
      for (size_t i = 0; i < size; ++i) {
         ar & data[i];
      }
   }
 
   // Explicit serialize functions for std library types
 
   /*
   * Save a std::complex<float> to a BinaryFileOArchive.
   */
   template <>
   inline 
   void serialize(BinaryFileOArchive& ar, std::complex<float>& data, 
                  const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save a std::complex<double> to a BinaryFileOArchive.
   */
   template <>
   inline 
   void serialize(BinaryFileOArchive& ar, std::complex<double>& data, 
                  const unsigned int version)
   {  ar.pack(data); }
 
   /*
   * Save a std::string to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, std::string& data, 
                         const unsigned int version)
   {
      size_t size = data.size() + 1; // the +1 is for the NULL
      ar.pack(size);
      const char* temp = data.c_str();
      ar.pack(temp, size);
   }
 
   // Explicit serialize functions for namespace Util
 
   /*
   * Save a Util::Vector to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, Vector& data, 
                         const unsigned int version)
   {  ar.pack(data); } 
 
   /*
   * Save a Util::IntVector to a BinaryFileOArchive.
   */
   template <>
   inline void serialize(BinaryFileOArchive& ar, IntVector& data, 
                         const unsigned int version)
   {  ar.pack(data); }
 
}
#endif