typedef struct tag_SPARSE_MATRIX_STRUCT {
	int eleNum;
	int rowNum;
	int colNum;
	double * mData;
	int * columns;
	int * rowIndex;
} SparseMatrix;

typedef struct tag_SPATIALLY_VARIANT_SPARSE_KERNEL_STRUCT {
	int imWidth;
	int imHeight;
	int kw;
	int kh;

	SparseMatrix sparseKernelMatrix;

} SpvKernelSparse;

int CSpvKernelManager::SaveSklKernelFile( char * filename , SpvKernelSparse * spvKernel ) {

	if ( spvKernel == NULL ) {
		return -2;
	}

	char svName[MAX_FILE_NAME_LENGTH];
	int filenameLength = (int)(strlen( filename ));
	if ( strncmp( &(filename[filenameLength-4]) , ".skl" , 4 ) == 0 ) {
		sprintf( svName , "%s" , filename );
	} else {
		sprintf( svName , "%s.skl" , filename );
	}

	FILE * saveGKFile = fopen( svName , "wb" );
	if ( saveGKFile == NULL ) {
		return -1;
	}

	fwrite( &(spvKernel->imWidth) , sizeof(int) , 1 , saveGKFile );
	fwrite( &(spvKernel->imHeight) , sizeof(int) , 1 , saveGKFile );
	fwrite( &(spvKernel->kw) , sizeof(int) , 1 , saveGKFile );
	fwrite( &(spvKernel->kh) , sizeof(int) , 1 , saveGKFile );
	fwrite( &(spvKernel->sparseKernelMatrix.colNum) , sizeof(int) , 1 , saveGKFile );
	fwrite( &(spvKernel->sparseKernelMatrix.eleNum) , sizeof(int) , 1 , saveGKFile );
	fwrite( &(spvKernel->sparseKernelMatrix.rowNum) , sizeof(int) , 1 , saveGKFile );
	fwrite( spvKernel->sparseKernelMatrix.columns , sizeof(int) , spvKernel->sparseKernelMatrix.eleNum , saveGKFile );
	fwrite( spvKernel->sparseKernelMatrix.mData , sizeof(double) , spvKernel->sparseKernelMatrix.eleNum , saveGKFile );
	fwrite( spvKernel->sparseKernelMatrix.rowIndex , sizeof(int) , spvKernel->sparseKernelMatrix.rowNum+1 , saveGKFile );

	fflush( saveGKFile );
	fclose( saveGKFile );

	return 0;
}

int CSpvKernelManager::LoadSklKernelFile( char * filename , SpvKernelSparse * spvKernel ) {

	if ( spvKernel == NULL ) {
		return -2;
	}

	FILE * saveGKFile = fopen( filename , "rb" );
	if ( saveGKFile == NULL ) {
		return -1;
	}

	fread( &(spvKernel->imWidth) , sizeof(int) , 1 , saveGKFile );
	fread( &(spvKernel->imHeight) , sizeof(int) , 1 , saveGKFile );
	fread( &(spvKernel->kw) , sizeof(int) , 1 , saveGKFile );
	fread( &(spvKernel->kh) , sizeof(int) , 1 , saveGKFile );
	fread( &(spvKernel->sparseKernelMatrix.colNum) , sizeof(int) , 1 , saveGKFile );
	fread( &(spvKernel->sparseKernelMatrix.eleNum) , sizeof(int) , 1 , saveGKFile );
	fread( &(spvKernel->sparseKernelMatrix.rowNum) , sizeof(int) , 1 , saveGKFile );

	SAFE_FREE( spvKernel->sparseKernelMatrix.columns );
	spvKernel->sparseKernelMatrix.columns = (int*)malloc( sizeof(int)*(spvKernel->sparseKernelMatrix.eleNum) );
	fread( spvKernel->sparseKernelMatrix.columns , sizeof(int) , spvKernel->sparseKernelMatrix.eleNum , saveGKFile );

	SAFE_FREE( spvKernel->sparseKernelMatrix.mData );
	spvKernel->sparseKernelMatrix.mData = (double*)malloc( sizeof(double)*(spvKernel->sparseKernelMatrix.eleNum) );
	fread( spvKernel->sparseKernelMatrix.mData , sizeof(double) , spvKernel->sparseKernelMatrix.eleNum , saveGKFile );

	SAFE_FREE( spvKernel->sparseKernelMatrix.rowIndex );
	spvKernel->sparseKernelMatrix.rowIndex = (int*)malloc( sizeof(int)*(spvKernel->sparseKernelMatrix.eleNum+1) );
	fread( spvKernel->sparseKernelMatrix.rowIndex , sizeof(int) , spvKernel->sparseKernelMatrix.rowNum+1 , saveGKFile );

	fclose( saveGKFile );

	return 0;
}