Added example for fill values

Update #318

examples/hdfgroup/H5D/h5ex_d_fillval.cpp

@@ -32,25 +32,14 @@ using Int32Matrix = Matrix<int32_t,DIM0,DIM1>;
 int
 main (void)
 {
-
-    herr_t          status;
-    hsize_t         dims[2] = {DIM0, DIM1},
-                    extdims[2] = {EDIM0, EDIM1},
-                    maxdims[2] = {H5S_UNLIMITED, H5S_UNLIMITED},
-                    chunk[2] = {CHUNK0, CHUNK1};
-    int             wdata[DIM0][DIM1],          /* Write buffer */
-                    rdata[DIM0][DIM1],          /* Read buffer */
-                    rdata2[EDIM0][EDIM1],       /* Read buffer for
-                                                   extenstion */
-                    fillval,
-
     Int32Matrix rdata,wdata;
+    Matrix<int32_t,EDIM0,EDIM1> rdata2;
     /*
      * Initialize data.
      */
     for (size_t i=0; i<DIM0; i++)
         for (size_t j=0; j<DIM1; j++)
-            wdata[i][j] = i * j - j;
+            wdata(i,j) = i * j - j;
 
     /*
      * Create a new file using the default properties.
@@ -62,12 +51,13 @@ main (void)
      */
     dataspace::Simple space({DIM0,DIM1},
                             {dataspace::Simple::UNLIMITED,
-                                dataspace::Simple::UNLIMITED});
+                             dataspace::Simple::UNLIMITED});
 
     /*
      * Create the dataset creation property list, and set the chunk
      * size.
      */
+    property::LinkCreationList lcpl;
     property::DatasetCreationList dcpl;
     dcpl.layout(property::DatasetLayout::CHUNKED);
     dcpl.chunk({CHUNK0,CHUNK1});
@@ -82,83 +72,53 @@ main (void)
      * that reading from the dataset immediately after creation will
      * return the fill value.
      */
-    status = H5Pset_alloc_time (dcpl, H5D_ALLOC_TIME_EARLY);
+    dcpl.allocation_time(property::DatasetAllocTime::EARLY);
 
     /*
      * Create the dataset using the dataset creation property list.
      */
-    dset = H5Dcreate (file, DATASET, H5T_STD_I32LE, space, H5P_DEFAULT, dcpl,
-                H5P_DEFAULT);
-
+    node::Dataset dset(file.root(),DATASET,datatype::create<int32_t>(),space,lcpl,dcpl);
     /*
      * Read values from the dataset, which has not been written to yet.
      */
-    status = H5Dread (dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
-                rdata[0]);
-
-    /*
-     * Output the data to the screen.
-     */
-    printf ("Dataset before being written to:\n");
-    for (i=0; i<dims[0]; i++) {
-        printf (" [");
-        for (j=0; j<dims[1]; j++)
-            printf (" %3d", rdata[i][j]);
-        printf ("]\n");
-    }
+    dset.read(rdata);
+    std::cout<<"Dataset before being written to:"<<std::endl;
+    std::cout<<rdata<<std::endl;
 
     /*
      * Write the data to the dataset.
      */
-    status = H5Dwrite (dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
-                wdata[0]);
+    dset.write(wdata);
 
     /*
      * Read the data back.
      */
-    status = H5Dread (dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
-                rdata[0]);
+    dset.read(rdata);
 
     /*
      * Output the data to the screen.
      */
-    printf ("\nDataset after being written to:\n");
-    for (i=0; i<dims[0]; i++) {
-        printf (" [");
-        for (j=0; j<dims[1]; j++)
-            printf (" %3d", rdata[i][j]);
-        printf ("]\n");
-    }
+    std::cout<<std::endl<<"Dataset after being written to:"<<std::endl;
+    std::cout<<rdata<<std::endl;
+
 
     /*
      * Extend the dataset.
      */
-    status = H5Dset_extent (dset, extdims);
+    dset.extent({EDIM0,EDIM1});
+
 
     /*
      * Read from the extended dataset.
      */
-    status = H5Dread (dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT,
-                rdata2[0]);
+    dset.read(rdata2);
 
     /*
      * Output the data to the screen.
      */
-    printf ("\nDataset after extension:\n");
-    for (i=0; i<extdims[0]; i++) {
-        printf (" [");
-        for (j=0; j<extdims[1]; j++)
-            printf (" %3d", rdata2[i][j]);
-        printf ("]\n");
-    }
+    std::cout<<std::endl<<"Dataset after extension:"<<std::endl;
+    std::cout<<rdata2<<std::endl;
 
-    /*
-     * Close and release resources.
-     */
-    status = H5Pclose (dcpl);
-    status = H5Dclose (dset);
-    status = H5Sclose (space);
-    status = H5Fclose (file);
 
     return 0;
 }