bytesex.h

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// include guard
#ifndef TF_BYTESEX_H_VERSION

#define TF_BYTESEX_H_VERSION \
  "TF_BYTESEX_H   V1.0"

// we include fstream, because all function are closely related to file I/O
// and file_magic definitely requires fstream
#include<fstream>

namespace tfxx {

namespace ioswap {

//----------------------------------------------------------------------
//
// we start with a set of useful types and enums

template<typename T>
union IOUnion {
  T value;                       
  char bytes[sizeof(T)]; 
};

enum Ecpu_type {
  cpu_Intel = 1,
  cpu_Motorola = 2,
  cpu_unknown = 3
};

enum Emagic_type {
  magic_match = 1,
  magic_swap = 2,
  magic_nomatch = 3
};

//----------------------------------------------------------------------
//
// some function templates

template<class T>
T swap(const T& value)
{
  IOUnion<T> in, out;
  in.value=value;
  out=swap(in);
  return(out.value);
}

template<class T>
IOUnion<T> swap(const IOUnion<T>& value)
{
  IOUnion<T> result;
  for (unsigned int i=0; i<sizeof(T); i++)
  { result.bytes[i]=value.bytes[sizeof(T)-i-1]; }
  return(result);
}

//----------------------------------------------------------------------
//
// some binary function

int magic(const char* const cmagic);

Ecpu_type cpu();

Emagic_type file_magic_test(std::istream& is, const char* const cmagic,
                            const bool& fortranmode=false);

void file_magic_write(std::ostream& os, const char* const cmagic,
                      const bool& fortranmode=false);

} // namespace ioswap

} // namespace tfxx

#endif // TF_BYTESEX_H_VERSION (includeguard)

/* ----- END OF bytesex.h ----- */