void Converter::ToFits	(	void *	dest,
		const void *	src,
		size_t	size
	)		const

Parameters

dest	Array to which the destination data is written
src	Array with the source data according to the format stored in the Converter
size	size of the destination data in bytes

Definition at line 891 of file Converter.cc.

References fFormat, fList, GetSize(), i, and type.

Referenced by GetSize(), ToFits(), and Fits::Write().

{
   // crawl through the src buffer and copy the data appropriately to the
   // destination buffer
   // Assumption: the string is always last. This way we
   // use the provided size to determine the number
   // of character to copy

   char       *charDest = static_cast<char*>(dest);
   const char *charSrc  = static_cast<const char*>(src);

   // We skip the last element 'v'
   for (Converter::FormatList::const_iterator i=fList.begin(); i!=fList.end()-1; i++)
   {
       /*
        // For speed reasons we don't do a check in the loop
       if (charDest-size>dest || charSrc-size>src)
       {
           ostringstream err;
           err << "Format description [fmt=" << fFormat << "] exceeds available data size (" << size << ")";
           throw runtime_error(err.str());
       }
       */

       // Skip strings (must be the last, so we could just skip it)
       const char type = i->first.first->name()[0];
       if (type=='S')
       {
           charSrc += strlen(charSrc)+1;
           continue;
       }

       const int s = i->first.second;      // size of element
       const int n = i->second.first;      // number of elements

       // Check if there are types with unknown sizes
       if (s==0 || n==0)
           throw runtime_error(string("Type '")+type+"' not supported converting to FITS.");

       // Let the compiler do some optimization
       switch (s)
       {
       case 1: memcpy(charDest, charSrc, s*n); charSrc+=s*n; charDest+=s*n; break;
       case 2: for (int j=0; j<n; j++) { reverse_copy(charSrc, charSrc+2, charDest); charSrc+=2; charDest+=2; } break;
       case 4: for (int j=0; j<n; j++) { reverse_copy(charSrc, charSrc+4, charDest); charSrc+=4; charDest+=4; } break;
       case 8: for (int j=0; j<n; j++) { reverse_copy(charSrc, charSrc+8, charDest); charSrc+=8; charDest+=8; } break;
       }
   }

   if (charDest-size!=dest/* || charSrc-size!=src*/)
   {
       ostringstream err;
       err << "ToFits - Data block size (" << size << ") doesn't fit format description [fmt=" << fFormat << "|size=" << GetSize() << "]";
       throw runtime_error(err.str());
   }
}

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