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* Merge examples repo into library * Change grepTest to be more fault-tolerant * Update examples macro file * Exclude all Fortran examples from doxygen
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/************************************************************
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This example shows how to read and write data to a compact
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dataset. The program first writes integers to a compact
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dataset with dataspace dimensions of DIM0xDIM1, then
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closes the file. Next, it reopens the file, reads back
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the data, and outputs it to the screen.
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************************************************************/
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#include "hdf5.h"
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#include <stdio.h>
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#include <stdlib.h>
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#define FILE "h5ex_d_compact.h5"
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#define DATASET "DS1"
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#define DIM0 4
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#define DIM1 7
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int
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main(void)
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{
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hid_t file = H5I_INVALID_HID;
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hid_t space = H5I_INVALID_HID;
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hid_t dset = H5I_INVALID_HID;
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hid_t dcpl = H5I_INVALID_HID;
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herr_t status;
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H5D_layout_t layout;
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hsize_t dims[2] = {DIM0, DIM1};
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int wdata[DIM0][DIM1]; /* Write buffer */
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int rdata[DIM0][DIM1]; /* Read buffer */
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hsize_t i, j;
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/*
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* Initialize data.
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*/
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for (i = 0; i < DIM0; i++)
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for (j = 0; j < DIM1; j++)
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wdata[i][j] = i * j - j;
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/*
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* Create a new file using the default properties.
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*/
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file = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
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/*
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* Create dataspace. Setting maximum size to NULL sets the maximum
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* size to be the current size.
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*/
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space = H5Screate_simple(2, dims, NULL);
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/*
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* Create the dataset creation property list, set the layout to
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* compact.
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*/
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dcpl = H5Pcreate(H5P_DATASET_CREATE);
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status = H5Pset_layout(dcpl, H5D_COMPACT);
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/*
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* Create the dataset. We will use all default properties for this
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* example.
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*/
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dset = H5Dcreate(file, DATASET, H5T_STD_I32LE, space, H5P_DEFAULT, dcpl, H5P_DEFAULT);
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/*
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* Write the data to the dataset.
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*/
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status = H5Dwrite(dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, wdata[0]);
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/*
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* Close and release resources.
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*/
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status = H5Pclose(dcpl);
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status = H5Dclose(dset);
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status = H5Sclose(space);
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status = H5Fclose(file);
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/*
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* Now we begin the read section of this example.
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*/
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/*
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* Open file and dataset using the default properties.
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*/
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file = H5Fopen(FILE, H5F_ACC_RDONLY, H5P_DEFAULT);
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dset = H5Dopen(file, DATASET, H5P_DEFAULT);
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/*
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* Retrieve the dataset creation property list, and print the
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* storage layout.
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*/
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dcpl = H5Dget_create_plist(dset);
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layout = H5Pget_layout(dcpl);
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printf("Storage layout for %s is: ", DATASET);
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switch (layout) {
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case H5D_COMPACT:
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printf("H5D_COMPACT\n");
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break;
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case H5D_CONTIGUOUS:
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printf("H5D_CONTIGUOUS\n");
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break;
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case H5D_CHUNKED:
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printf("H5D_CHUNKED\n");
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break;
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#if H5_VERSION_GE(1, 10, 0) && !defined(H5_USE_18_API) && !defined(H5_USE_16_API)
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case H5D_VIRTUAL:
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printf("H5D_VIRTUAL\n");
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break;
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#endif
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case H5D_LAYOUT_ERROR:
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case H5D_NLAYOUTS:
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printf("H5D_LAYOUT_ERROR\n");
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}
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/*
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* Read the data using the default properties.
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*/
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status = H5Dread(dset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, rdata[0]);
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/*
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* Output the data to the screen.
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*/
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printf("%s:\n", DATASET);
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for (i = 0; i < DIM0; i++) {
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printf(" [");
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for (j = 0; j < DIM1; j++)
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printf(" %3d", rdata[i][j]);
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printf("]\n");
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}
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/*
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* Close and release resources.
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*/
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status = H5Pclose(dcpl);
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status = H5Dclose(dset);
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status = H5Fclose(file);
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return 0;
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}
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