OMFormatT_impl.hh

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//=============================================================================
//
//  Helper Functions for binary reading / writing
//
//=============================================================================


#define OPENMESH_IO_OMFORMAT_CC


//== INCLUDES =================================================================

#include <OpenMesh/Core/IO/OMFormat.hh>
#include <algorithm>
#include <iomanip>

//== NAMESPACES ===============================================================

namespace OpenMesh {
namespace IO {

  // helper to store a an integer
  template< typename T > 
  size_t 
  store( std::ostream& _os, 
         const T& _val, 
         OMFormat::Chunk::Integer_Size _b, 
         bool _swap,
         t_signed)
  {    
    assert( OMFormat::is_integer( _val ) );

    switch( _b ) 
    {
      case OMFormat::Chunk::Integer_8:
      {         
        OMFormat::int8 v = static_cast<OMFormat::int8>(_val);
        return store( _os, v, _swap );
      }
      case OMFormat::Chunk::Integer_16:
      { 
        OMFormat::int16 v = static_cast<OMFormat::int16>(_val);
        return store( _os, v, _swap );
      }
      case OMFormat::Chunk::Integer_32:
      { 
        OMFormat::int32 v = static_cast<OMFormat::int32>(_val);
        return store( _os, v, _swap );
      }      
      case OMFormat::Chunk::Integer_64:
      { 
        OMFormat::int64 v = static_cast<OMFormat::int64>(_val);
        return store( _os, v, _swap );
      }
    }
    return 0;
  }


  // helper to store a an unsigned integer
  template< typename T > 
  size_t 
  store( std::ostream& _os, 
         const T& _val, 
         OMFormat::Chunk::Integer_Size _b, 
         bool _swap,
         t_unsigned)
  {    
    assert( OMFormat::is_integer( _val ) );

    switch( _b ) 
    {
      case OMFormat::Chunk::Integer_8:
      { 
        OMFormat::uint8 v = static_cast<OMFormat::uint8>(_val);
        return store( _os, v, _swap );
      }
      case OMFormat::Chunk::Integer_16:
      { 
        OMFormat::uint16 v = static_cast<OMFormat::uint16>(_val);
        return store( _os, v, _swap );
      }
      case OMFormat::Chunk::Integer_32:
      { 
        OMFormat::uint32 v = static_cast<OMFormat::uint32>(_val);
        return store( _os, v, _swap );
      }
      
      case OMFormat::Chunk::Integer_64:
      { 
        OMFormat::uint64 v = static_cast<OMFormat::uint64>(_val);
        return store( _os, v, _swap );
      }
    }
    return 0;
  }


  // helper to restore a an integer
  template< typename T > 
  size_t 
  restore( std::istream& _is, 
           T& _val, 
           OMFormat::Chunk::Integer_Size _b, 
           bool _swap,
           t_signed)
  {    
    assert( OMFormat::is_integer( _val ) );
    size_t bytes = 0;

    switch( _b ) 
    {
      case OMFormat::Chunk::Integer_8:
      {         
        OMFormat::int8 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
      case OMFormat::Chunk::Integer_16:
      { 
        OMFormat::int16 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
      case OMFormat::Chunk::Integer_32:
      { 
        OMFormat::int32 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }      
      case OMFormat::Chunk::Integer_64:
      { 
        OMFormat::int64 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
    }
    return bytes;
  }


  // helper to restore a an unsigned integer
  template< typename T > 
  size_t 
  restore( std::istream& _is, 
           T& _val, 
           OMFormat::Chunk::Integer_Size _b, 
           bool _swap,
           t_unsigned)
  {    
    assert( OMFormat::is_integer( _val ) );
    size_t bytes = 0;

    switch( _b ) 
    {
      case OMFormat::Chunk::Integer_8:
      { 
        OMFormat::uint8 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
      case OMFormat::Chunk::Integer_16:
      { 
        OMFormat::uint16 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
      case OMFormat::Chunk::Integer_32:
      { 
        OMFormat::uint32 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
      
      case OMFormat::Chunk::Integer_64:
      { 
        OMFormat::uint64 v;
        bytes = restore( _is, v, _swap );
        _val = static_cast<T>(v);
        break;
      }
    }
    return bytes;
  }

//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================