# (C) Copyright 2005- ECMWF.

unsigned [2] N2 : dump;
unsigned [2] codedNumberOfGroups : no_copy ;
unsigned [2] numberOfSecondOrderPackedValues : dump;

# used to extend
unsigned [1] extraValues=0 : hidden, edition_specific;

meta numberOfGroups evaluate(codedNumberOfGroups + 65536 * extraValues);

unsigned [1] widthOfWidths : dump;
unsigned [1] widthOfLengths : dump;
unsigned [2] NL : dump;

if (orderOfSPD) {
	 unsigned[1] widthOfSPD ;
	 meta SPD spd(widthOfSPD,orderOfSPD) : read_only;
} 


meta groupWidths unsigned_bits(widthOfWidths,numberOfGroups) : read_only;
meta groupLengths unsigned_bits(widthOfLengths,numberOfGroups) : read_only;
meta firstOrderValues unsigned_bits(widthOfFirstOrderValues,numberOfGroups) : read_only;
meta countOfGroupLengths sum(groupLengths);

transient numberOfCodedValues=countOfGroupLengths+orderOfSPD;
#transient numberOfCodedValues=countOfGroupLengths;
meta bitsPerValue second_order_bits_per_value(codedValues,binaryScaleFactor,decimalScaleFactor);


position offsetBeforeData;
if(bitmapPresent)   {
   meta codedValues data_g1second_order_general_extended_packing(
	#simple_packing args
     section4Length,
     offsetBeforeData,
     offsetSection4,
     unitsFactor,
     unitsBias,
     changingPrecision,
     numberOfCodedValues,
     bitsPerValue, 
     referenceValue,
     binaryScaleFactor,
     decimalScaleFactor,
     optimizeScaleFactor,
	#g1second_order_row_by_row args
	 halfByte,
	 packingType,
	 grid_ieee,
	 precision,
	 widthOfFirstOrderValues,
	 firstOrderValues,
	 N1,
	 N2,
	 numberOfGroups,
	 codedNumberOfGroups,
	 numberOfSecondOrderPackedValues,
	 extraValues,
	 groupWidths,
	 widthOfWidths,
	 groupLengths,
	 widthOfLengths,
	 NL,
	 SPD,
	 widthOfSPD,
	 orderOfSPD,
	 numberOfPoints

   ): read_only;
   alias data.packedValues = codedValues; 

   if (boustrophedonicOrdering)
   {
      if (GRIBEX_boustrophedonic)
      {
         meta preBitmapValues data_apply_boustrophedonic_bitmap(codedValues,bitmap,missingValue,binaryScaleFactor,numberOfRows,numberOfColumns,numberOfPoints): read_only;
      }
      else
      {
         meta preBitmapValues data_apply_bitmap(codedValues,bitmap,missingValue,binaryScaleFactor) : read_only;
      }
      meta values data_apply_boustrophedonic(preBitmapValues,numberOfRows,numberOfColumns,numberOfPoints,pl) : dump;
   }
   else
   {
       meta values data_apply_bitmap(codedValues,bitmap,missingValue,binaryScaleFactor) : dump;
   }
} else {
   if (boustrophedonicOrdering) {

	   meta codedValues data_g1second_order_general_extended_packing(
		#simple_packing args
		 section4Length,
		 offsetBeforeData,
		 offsetSection4,
		 unitsFactor,
		 unitsBias,
		 changingPrecision,
		 numberOfCodedValues,
		 bitsPerValue, 
		 referenceValue,
		 binaryScaleFactor,
		 decimalScaleFactor,
         optimizeScaleFactor,
		#g1second_order_row_by_row args
		 halfByte,
		 packingType,
		 grid_ieee,
		 precision,
		 widthOfFirstOrderValues,
		 firstOrderValues,
		 N1,
		 N2,
		 numberOfGroups,
		 codedNumberOfGroups,
		 numberOfSecondOrderPackedValues,
		 extraValues,
		 groupWidths,
		 widthOfWidths,
		 groupLengths,
		 widthOfLengths,
		 NL,
		 SPD,
		 widthOfSPD,
		 orderOfSPD,
		 numberOfPoints

		 ) : read_only;
		 meta values data_apply_boustrophedonic(codedValues,numberOfRows,numberOfColumns,numberOfPoints,pl) : dump;
	} else {
	   meta values data_g1second_order_general_extended_packing(
		#simple_packing args
		 section4Length,
		 offsetBeforeData,
		 offsetSection4,
		 unitsFactor,
		 unitsBias,
		 changingPrecision,
		 numberOfCodedValues,
		 bitsPerValue, 
		 referenceValue,
		 binaryScaleFactor,
		 decimalScaleFactor,
         optimizeScaleFactor,
		#g1second_order_row_by_row args
		 halfByte,
		 packingType,
		 grid_ieee,
		 precision,
		 widthOfFirstOrderValues,
		 firstOrderValues,
		 N1,
		 N2,
		 numberOfGroups,
		 codedNumberOfGroups,
		 numberOfSecondOrderPackedValues,
		 extraValues,
		 groupWidths,
		 widthOfWidths,
		 groupLengths,
		 widthOfLengths,
		 NL,
		 SPD,
		 widthOfSPD,
		 orderOfSPD,
		 numberOfPoints

		 ) : dump;
		 alias codedValues=values;
	}
   alias data.packedValues = values;
}

meta packingError simple_packing_error(bitsPerValue,binaryScaleFactor,decimalScaleFactor,referenceValue,ibm) : no_copy;

template statistics "common/statistics_grid.def";