diff options
Diffstat (limited to 'examples/h5_chunk_read.c')
| -rw-r--r-- | examples/h5_chunk_read.c | 106 |
1 files changed, 58 insertions, 48 deletions
diff --git a/examples/h5_chunk_read.c b/examples/h5_chunk_read.c index c6bf728..af87c10 100644 --- a/examples/h5_chunk_read.c +++ b/examples/h5_chunk_read.c @@ -1,4 +1,3 @@ - /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by the Board of Trustees of the University of Illinois. * * All rights reserved. * @@ -39,7 +38,7 @@ main (void) hsize_t chunk_dims[2]; hsize_t col_dims[1]; hsize_t count[2]; - hssize_t offset[2]; + hsize_t offset[2]; herr_t status, status_n; @@ -68,24 +67,6 @@ main (void) rank, (unsigned long)(dims[0]), (unsigned long)(dims[1])); /* - * Get creation properties list. - */ - cparms = H5Dget_create_plist(dataset); /* Get properties handle first. */ - - /* - * Check if dataset is chunked. - */ - if (H5D_CHUNKED == H5Pget_layout(cparms)) { - - /* - * Get chunking information: rank and dimensions - */ - rank_chunk = H5Pget_chunk(cparms, 2, chunk_dims); - printf("chunk rank %d, dimensions %lu x %lu\n", rank_chunk, - (unsigned long)(chunk_dims[0]), (unsigned long)(chunk_dims[1])); - } - - /* * Define the memory space to read dataset. */ memspace = H5Screate_simple(RANK,dims,NULL); @@ -103,6 +84,11 @@ main (void) } /* + * Close/release resources. + */ + H5Sclose(memspace); + + /* * dataset rank 2, dimensions 10 x 5 * chunk rank 2, dimensions 2 x 5 @@ -145,6 +131,11 @@ main (void) } /* + * Close/release resources. + */ + H5Sclose(memspace); + + /* * Third column: * 1 * 1 @@ -159,36 +150,56 @@ main (void) */ /* - * Define the memory space to read a chunk. + * Get creation properties list. */ - memspace = H5Screate_simple(rank_chunk,chunk_dims,NULL); + cparms = H5Dget_create_plist(dataset); /* Get properties handle first. */ - /* - * Define chunk in the file (hyperslab) to read. - */ - offset[0] = 2; - offset[1] = 0; - count[0] = chunk_dims[0]; - count[1] = chunk_dims[1]; - status = H5Sselect_hyperslab(filespace, H5S_SELECT_SET, offset, NULL, - count, NULL); + if (H5D_CHUNKED == H5Pget_layout(cparms)) { - /* - * Read chunk back and display. - */ - status = H5Dread(dataset, H5T_NATIVE_INT, memspace, filespace, - H5P_DEFAULT, chunk_out); - printf("\n"); - printf("Chunk: \n"); - for (j = 0; j < chunk_dims[0]; j++) { - for (i = 0; i < chunk_dims[1]; i++) printf("%d ", chunk_out[j][i]); - printf("\n"); - } - /* - * Chunk: - * 1 1 1 0 0 - * 2 0 0 0 0 - */ + /* + * Get chunking information: rank and dimensions + */ + rank_chunk = H5Pget_chunk(cparms, 2, chunk_dims); + printf("chunk rank %d, dimensions %lu x %lu\n", rank_chunk, + (unsigned long)(chunk_dims[0]), (unsigned long)(chunk_dims[1])); + + /* + * Define the memory space to read a chunk. + */ + memspace = H5Screate_simple(rank_chunk,chunk_dims,NULL); + + /* + * Define chunk in the file (hyperslab) to read. + */ + offset[0] = 2; + offset[1] = 0; + count[0] = chunk_dims[0]; + count[1] = chunk_dims[1]; + status = H5Sselect_hyperslab(filespace, H5S_SELECT_SET, offset, NULL, + count, NULL); + + /* + * Read chunk back and display. + */ + status = H5Dread(dataset, H5T_NATIVE_INT, memspace, filespace, + H5P_DEFAULT, chunk_out); + printf("\n"); + printf("Chunk: \n"); + for (j = 0; j < chunk_dims[0]; j++) { + for (i = 0; i < chunk_dims[1]; i++) printf("%d ", chunk_out[j][i]); + printf("\n"); + } + /* + * Chunk: + * 1 1 1 0 0 + * 2 0 0 0 0 + */ + + /* + * Close/release resources. + */ + H5Sclose(memspace); + } /* * Close/release resources. @@ -196,7 +207,6 @@ main (void) H5Pclose(cparms); H5Dclose(dataset); H5Sclose(filespace); - H5Sclose(memspace); H5Fclose(file); return 0; |