#include "mfhdf.h"

#define FILE_NAME     "SDS.hdf"
#define SDS_NAME      "SDStemplate"
#define WRONG_NAME    "WrongName"
#define X_LENGTH      5
#define Y_LENGTH      16

int main()
{
   /************************* Variable declaration **************************/

   int32 sd_id, sds_id, sds_index;
   intn  status;
   int32 start[2], edges[2];
   int32 data[Y_LENGTH][X_LENGTH];
   int   j;

   /********************* End of variable declaration ***********************/

   /*
   * Open the file for reading and initialize the SD interface.
   */
   sd_id = SDstart (FILE_NAME, DFACC_READ);

   /*
   * Find index of the data set with the name specified in WRONG_NAME.
   * Error condition occurs, since the data set with that name does not exist 
   * in the file.
   */ 
   sds_index = SDnametoindex (sd_id, WRONG_NAME);
   if (sds_index == FAIL)
   printf ("Data set with the name \"WrongName\" does not exist\n"); 

   /*
   * Find index of the data set with the name specified in SDS_NAME and use 
   * the index to select the data set.
   */ 
   sds_index = SDnametoindex (sd_id, SDS_NAME);
   sds_id = SDselect (sd_id, sds_index);

   /* 
   * Set elements of the array start to 0, elements of the array edges to 
   * SDS dimensions, and use NULL for stride argument in SDreaddata to read
   * the entire data.
   */
   start[0] = 0;
   start[1] = 0;
   edges[0] = Y_LENGTH;
   edges[1] = X_LENGTH;

   /*
   * Read the entire data into the buffer named data.
   */
   status = SDreaddata (sds_id, start, NULL, edges, (VOIDP)data);

   /* 
   * Print 10th row; the following numbers should be displayed:
   *
   *             10 1000 12 13 14
   */
   for (j = 0; j < X_LENGTH; j++) printf ("%d ", data[9][j]);
   printf ("\n");

   /*
   * Terminate access to the data set.
   */
   status = SDendaccess (sds_id);

   /*
   * Terminate access to the SD interface and close the file.
   */
   status = SDend (sd_id);

   return 0;
}
