// SVF.h, here the structures and functions are declared 
// which are needed for writing and reading .svf files 
// see also SVF.c

typedef struct {
    char  Selected,
          Hidden,
          RightYaxis;
    float *X,
          *Y,
          *Z;
    int   NrOfElements;
    char  DataPath[MAX_PATHNAME_LEN],
          DSName[MAX_PATHNAME_LEN],
          *GraphTitle,
          *XName,
          *YName,
          *ZName,
          *DSInfo;
    unsigned char *DataBlock;
    unsigned int NrOfBytes;
} SVF_DATASET_PARAMS;

/* Write a SVF file with only one data set in it */
int WriteSVFFileSingle(char *PathName, char AskForOverwrite, 
                        char XReverse, char YReverse, char YRReverse, 
                        size_t NrOfBytes, BYTE *DataBlock, 
                        char *DSName, char *GraphTitle, 
                        char *XName, char *YName, char *ZName, char *DSInfo,
                        int NrOfElements, float *XData, float *YData, float *ZData);

/* Write a SVF file with multiple data sets in it. Use the SVF_DATASET_PARAMS structure for this */
int WriteSVFFile(char *PathName, char KeepOriginalDataPath, char AskForOverwrite,
                        size_t NrOfBytesToSkip, void *Data,
                        char XReverse, char YReverse, char YRReverse, int NrOfDataSets, 
                        SVF_DATASET_PARAMS *DS);

/* Reads a SVF file and returns a data set structure */
SVF_DATASET_PARAMS *ReadSVFFile(int MaxNrOfDataSets, int MaxNrOfElements,
                        char *PathName, char *XReverse, char *YReverse, char *YRReverse,
                        size_t *NrOfBytesForGeneralDataBlock, BYTE **GeneralDataBlock, 
                        int *NrOfDataSets);

/* Frees the data set structure after usage */
void FreeSVFDS(SVF_DATASET_PARAMS *DS, int NrOfDataSets);

#define NO_KEEP_PATHS 0
#define KEEP_PATHS 1
#define NO_ASK_OVERWRITE 0
#define ASK_OVERWRITE 1
#define NO_DELETE_SOURCE 0
#define DELETE_SOURCE 1