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[svn-r267] Example has been updated to show how to read a hyperslab (column) from a

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chunked dataset.
This commit is contained in:
Elena Pourmal 1998-02-13 09:26:11 -05:00
parent ea3daf23d0
commit 7cfd4f3872
1 changed files with 44 additions and 3 deletions
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47
examples/h5_chunk_read.c
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@ -8,8 +8,9 @@
#define FILE "SDSextendible.h5"
#define DATASETNAME "ExtendibleArray"
#define RANK 2
#define NX 10
#define NY 5
#define RANKC 1
#define NX 10
#define NY 5
main ()
{
@ -23,7 +24,7 @@ main ()
stored in file */
size_t dims[2]; /* dataset and chunk dimensions */
size_t chunk_dims[2];
size_t col_dims[1];
size_t size[2];
size_t count[2];
int offset[2];
@ -32,6 +33,7 @@ main ()
int data_out[NX][NY]; /* buffer for dataset to be read */
int chunk_out[2][5]; /* buffer for chunk to be read */
int column[10]; /* buffer for column to be read */
int i, j, rank, rank_chunk;
@ -102,6 +104,45 @@ for (j = 0; j < dims[0]; j++) {
2 0 0 0 0
*/
/*
* Read the third column from the dataset.
* First define memory dataspace, then define hyperslab
* and read it into column array.
*/
col_dims[0] = 10;
memspace = H5Pcreate_simple(RANKC, col_dims, NULL);
/*
* Define the column (hyperslab) to read.
*/
offset[0] = 0;
offset[1] = 2;
count[0] = 10;
count[1] = 1;
status = H5Pset_hyperslab(filespace, offset, count, NULL);
status = H5Dread(dataset, H5T_NATIVE_INT, memspace, filespace,
H5C_DEFAULT, column);
printf("\n");
printf("Third column: \n");
for (i = 0; i < 10; i++) {
printf("%d \n", column[i]);
}
/*
Third column:
1
1
1
0
0
0
0
0
0
0
*/
/*
* Define the memory space to read a chunk.
*/