Method getNextInt64

plugins/e57/libE57Format/src/SourceDestBufferImpl.cpp:317–385

}

int64_t SourceDestBufferImpl::getNextInt64()
{
   /// don't checkImageFileOpen

   /// Verify index is within bounds
   if ( nextIndex_ >= capacity_ )
   {
      throw E57_EXCEPTION2( ErrorInternal, "pathName=" + pathName_ );
   }

   /// Fetch value from source buffer.
   /// Convert from non-integer formats if requested.
   char *p = &base_[nextIndex_ * stride_];
   int64_t value;
   switch ( memoryRepresentation_ )
   {
      case Int8:
         value = static_cast<int64_t>( *reinterpret_cast<int8_t *>( p ) );
         break;
      case UInt8:
         value = static_cast<int64_t>( *reinterpret_cast<uint8_t *>( p ) );
         break;
      case Int16:
         value = static_cast<int64_t>( *reinterpret_cast<int16_t *>( p ) );
         break;
      case UInt16:
         value = static_cast<int64_t>( *reinterpret_cast<uint16_t *>( p ) );
         break;
      case Int32:
         value = static_cast<int64_t>( *reinterpret_cast<int32_t *>( p ) );
         break;
      case UInt32:
         value = static_cast<int64_t>( *reinterpret_cast<uint32_t *>( p ) );
         break;
      case Int64:
         value = *reinterpret_cast<int64_t *>( p );
         break;
      case Bool:
         if ( !doConversion_ )
         {
            throw E57_EXCEPTION2( ErrorConversionRequired, "pathName=" + pathName_ );
         }
         /// Convert bool to 0/1, all non-zero values map to 1.0
         value = ( *reinterpret_cast<bool *>( p ) ) ? 1 : 0;
         break;
      case Real32:
         if ( !doConversion_ )
         {
            throw E57_EXCEPTION2( ErrorConversionRequired, "pathName=" + pathName_ );
         }
         //??? fault if get special value: NaN, NegInf...
         value = static_cast<int64_t>( *reinterpret_cast<float *>( p ) );
         break;
      case Real64:
         if ( !doConversion_ )
         {
            throw E57_EXCEPTION2( ErrorConversionRequired, "pathName=" + pathName_ );
         }