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| -rw-r--r-- | examples/h5_extend_read.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/examples/h5_extend_read.c b/examples/h5_extend_read.c deleted file mode 100644 index 6965722..0000000 --- a/examples/h5_extend_read.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * This example shows how to work with extendable dataset. - * In the current version of the library dataset MUST be - * chunked. - * - */ - -#include "hdf5.h" - -#define FILE "SDSextendable.h5" -#define DATASETNAME "ExtendableArray" -#define RANK 2 -#define NX 10 -#define NY 5 - -main () -{ - hid_t file; /* handles */ - hid_t datatype, dataset; - hid_t filespace; - hid_t memspace; - hid_t cparms; - H5T_class_t class; /* data type class */ - size_t elem_size; /* size of the data element - stored in file */ - size_t dims[2]; /* dataset and chunk dimensions */ - size_t chunk_dims[2]; - - size_t size[2]; - size_t count[2]; - int offset[2]; - - herr_t status, status_n; - - int data_out[NX][NY]; /* buffer for dataset to be read */ - int chunk_out[2][5]; /* buffer for chunk to be read */ - int i, j, rank, rank_chunk; - - -/* - * Open the file and the dataset. - */ -file = H5Fopen(FILE, H5ACC_DEFAULT, H5C_DEFAULT); -dataset = H5Dopen(file, DATASETNAME); - -/* - * Get dataset rank and dimension. - */ - -filespace = H5Dget_space(dataset); /* Get filespace handle first. */ -rank = H5Pget_ndims(filespace); -status_n = H5Pget_dims(filespace, dims); -printf("dataset rank %d, dimensions %d x %d \n", rank, dims[0], dims[1]); - -/* - * Get creation properties. - */ -cparms = H5Dget_create_parms(dataset); /* Get properties handle first. */ - -/* - * Get chunking information: rank and dimensions - */ -rank_chunk = H5Cget_chunk(cparms, 2, chunk_dims); -printf("chunk rank %d, dimensions %d x %d \n", rank_chunk, - chunk_dims[0], chunk_dims[1]); - - -/* - * Define the memory filespace to read dataset. - */ -memspace = H5Pcreate_simple(RANK,dims,NULL); - -/* - * Read dataset back and display. - */ -status = H5Dread(dataset, H5T_NATIVE_INT, memspace, filespace, - H5C_DEFAULT, data_out); - printf("\n"); - printf("Dataset: \n"); -for (j = 0; j < dims[0]; j++) { - for (i = 0; i < dims[1]; i++) printf("%d ", data_out[j][i]); - printf("\n"); -} - -/* - dataset rank 2, dimensions 10 x 5 - chunk rank 2, dimensions 2 x 5 - - Dataset: - 1 1 1 3 3 - 1 1 1 3 3 - 1 1 1 0 0 - 2 0 0 0 0 - 2 0 0 0 0 - 2 0 0 0 0 - 2 0 0 0 0 - 2 0 0 0 0 - 2 0 0 0 0 - 2 0 0 0 0 -*/ - -/* - * Define the memory filespace to read a chunk. - */ -memspace = H5Pcreate_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 = H5Pset_hyperslab(filespace, offset, count, NULL); - -/* - * Read chunk back and display. - */ -status = H5Dread(dataset, H5T_NATIVE_INT, memspace, filespace, - H5C_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. - */ -H5Dclose(dataset); -H5Pclose(filespace); -H5Pclose(memspace); -H5Fclose(file); - -} |