[svn-r3196]

Purpose:
    Adding Tutorial to development branch (R 1.4)
Platforms tested:
    IE 5

doc/html/Tutor/examples/h5_ref2regw.c

@@ -0,0 +1,112 @@
+#include <stdlib.h>
+#include <hdf5.h>
+
+#define FILE2	"trefer2.h5"
+#define SPACE1_NAME  "Space1"
+#define SPACE1_RANK     1
+#define SPACE1_DIM1     4
+
+/* Dataset with fixed dimensions */
+#define SPACE2_NAME  "Space2"
+#define SPACE2_RANK	2
+#define SPACE2_DIM1	10
+#define SPACE2_DIM2	10
+
+/* Element selection information */
+#define POINT1_NPOINTS 10
+
+int
+main(void)
+{
+    hid_t		fid1;		/* HDF5 File IDs		*/
+    hid_t		dset1,	/* Dataset ID			*/
+                dset2;      /* Dereferenced dataset ID */
+    hid_t		sid1,       /* Dataspace ID	#1		*/
+                sid2;       /* Dataspace ID	#2		*/
+    hsize_t		dims1[] = {SPACE1_DIM1},
+            	dims2[] = {SPACE2_DIM1, SPACE2_DIM2};
+    hssize_t	start[SPACE2_RANK];     /* Starting location of hyperslab */
+    hsize_t		stride[SPACE2_RANK];    /* Stride of hyperslab */
+    hsize_t		count[SPACE2_RANK];     /* Element count of hyperslab */
+    hsize_t		block[SPACE2_RANK];     /* Block size of hyperslab */
+    hssize_t	coord1[POINT1_NPOINTS][SPACE2_RANK]; 
+                                    /* Coordinates for point selection */
+    hdset_reg_ref_t      *wbuf;      /* buffer to write to disk */
+    int     *dwbuf;      /* Buffer for writing numeric data to disk */
+    int        i;          /* counting variables */
+    herr_t		ret;		/* Generic return value		*/
+
+
+    /* Allocate write & read buffers */
+    wbuf=calloc(sizeof(hdset_reg_ref_t), SPACE1_DIM1);
+    dwbuf=malloc(sizeof(int)*SPACE2_DIM1*SPACE2_DIM2);
+
+    /* Create file */
+    fid1 = H5Fcreate(FILE2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+
+    /* Create dataspace for datasets */
+    sid2 = H5Screate_simple(SPACE2_RANK, dims2, NULL);
+
+    /* Create a dataset */
+    dset2=H5Dcreate(fid1,"Dataset2",H5T_STD_U8LE,sid2,H5P_DEFAULT);
+
+    for(i=0; i<SPACE2_DIM1*SPACE2_DIM2; i++)
+        dwbuf[i]=i*3;
+
+    /* Write selection to disk */
+    ret=H5Dwrite(dset2,H5T_NATIVE_INT,H5S_ALL,H5S_ALL,H5P_DEFAULT,dwbuf);
+
+    /* Close Dataset */
+    ret = H5Dclose(dset2);
+
+    /* Create dataspace for the reference dataset */
+    sid1 = H5Screate_simple(SPACE1_RANK, dims1, NULL);
+
+    /* Create a dataset */
+    dset1=H5Dcreate(fid1,"Dataset1",H5T_STD_REF_DSETREG,sid1,H5P_DEFAULT);
+
+    /* Create references */
+
+    /* Select 6x6 hyperslab for first reference */
+    start[0]=2; start[1]=2;
+    stride[0]=1; stride[1]=1;
+    count[0]=6; count[1]=6;
+    block[0]=1; block[1]=1;
+    ret = H5Sselect_hyperslab(sid2,H5S_SELECT_SET,start,stride,count,block);
+
+    /* Store first dataset region */
+    ret = H5Rcreate(&wbuf[0],fid1,"/Dataset2",H5R_DATASET_REGION,sid2);
+
+    /* Select sequence of ten points for second reference */
+    coord1[0][0]=6; coord1[0][1]=9;
+    coord1[1][0]=2; coord1[1][1]=2;
+    coord1[2][0]=8; coord1[2][1]=4;
+    coord1[3][0]=1; coord1[3][1]=6;
+    coord1[4][0]=2; coord1[4][1]=8;
+    coord1[5][0]=3; coord1[5][1]=2;
+    coord1[6][0]=0; coord1[6][1]=4;
+    coord1[7][0]=9; coord1[7][1]=0;
+    coord1[8][0]=7; coord1[8][1]=1;
+    coord1[9][0]=3; coord1[9][1]=3;
+    ret = H5Sselect_elements(sid2,H5S_SELECT_SET,POINT1_NPOINTS,(const hssize_t **)coord1);
+
+    /* Store second dataset region */
+    ret = H5Rcreate(&wbuf[1],fid1,"/Dataset2",H5R_DATASET_REGION,sid2);
+
+    /* Write selection to disk */
+    ret=H5Dwrite(dset1,H5T_STD_REF_DSETREG,H5S_ALL,H5S_ALL,H5P_DEFAULT,wbuf);
+
+    /* Close all objects */
+    ret = H5Sclose(sid1);
+    ret = H5Dclose(dset1);
+    ret = H5Sclose(sid2);
+    
+    /* Close file */
+    ret = H5Fclose(fid1);
+
+    free(wbuf);
+    free(dwbuf);
+    return 0;
+}   
+
+