mirror of
https://github.com/HDFGroup/hdf5.git
synced 2025-02-17 16:10:24 +08:00
4fe5ac0999
test_write.c - creates an HDF5 file, writes first dataset,
then closes the file,
reopens it and adds the second data set
test_read.c - finds datasets created by test_write.c program
and prints out some information about datasets.
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
|
|
/* This program creates two datasets and stores them in HDF5 file */
|
|
|
|
#include "hdf5.h"
|
|
|
|
/* Define data type, dimensionlity, architecture and name for the first
|
|
dataset */
|
|
|
|
|
|
#define DATA1_BASE H5T_INT
|
|
#define DATA1_LEN 2
|
|
#define DATA1_RANK 2
|
|
#define DATA1_DIM1 10
|
|
#define DATA1_DIM2 5
|
|
#define DATA1_ARCH H5T_BIGENDIAN
|
|
#define DATA1_NAME "ShortIntegers"
|
|
|
|
/* Define data type, dimensionality, architecture and name for the second
|
|
dataset */
|
|
|
|
|
|
#define DATA2_BASE H5T_FLOAT
|
|
#define DATA2_LEN 8
|
|
#define DATA2_RANK 1
|
|
#define DATA2_DIM1 8
|
|
#define DATA2_ARCH H5T_LITTLEENDIAN
|
|
#define DATA2_NAME "DoubleFloats"
|
|
|
|
main(void)
|
|
|
|
{
|
|
|
|
hid_t file1_id, file2_id; /* HDF5 file IDs */
|
|
|
|
hid_t t1_id; /* Type ID for the first dataset */
|
|
hid_t d1_id; /* Dimensionality ID for the first dataset */
|
|
hid_t data1_id; /* Data ID for the first dataset */
|
|
|
|
uint32 dims1[DATA1_RANK] = {DATA1_DIM1, DATA1_DIM2};
|
|
int16 data1[DATA1_DIM1][DATA1_DIM2];
|
|
|
|
|
|
hid_t t2_id; /* Type ID for the second dataset */
|
|
hid_t d2_id; /* Dimensionality ID for the second dataset */
|
|
hid_t data2_id; /* Data ID for the second dataset */
|
|
|
|
uint32 dims2[DATA2_RANK] = {DATA2_DIM1};
|
|
float64 data2[DATA2_DIM1];
|
|
|
|
herr_t ret;
|
|
|
|
intn k,l;
|
|
|
|
/* Initialize datasets */
|
|
|
|
for (k=0; k<DATA1_DIM1; k++) {
|
|
for (l=0; l<DATA1_DIM2; l++) {
|
|
data1[k][l] = (k+l);
|
|
}
|
|
}
|
|
|
|
|
|
for (k=0; k<DATA2_DIM1; k++) {
|
|
data2[k] = (double) (k);
|
|
}
|
|
|
|
/* Create HDF5 file */
|
|
|
|
file1_id = H5Fcreate("HDF5_file", H5ACC_OVERWRITE,0,0);
|
|
|
|
/* Create and initialize datatype object for the first dataset */
|
|
|
|
t1_id = H5Mcreate(file1_id,H5_DATATYPE,"Short Integer data type");
|
|
ret = H5Tset_type(t1_id, DATA1_BASE, DATA1_LEN, DATA1_ARCH);
|
|
|
|
/* Create and initialize dimensionality object for the first dataset */
|
|
|
|
d1_id = H5Mcreate(file1_id, H5_DATASPACE, "2D");
|
|
ret = H5Pset_space(d1_id,DATA1_RANK, dims1);
|
|
|
|
/* Create and initialize first dataset object */
|
|
|
|
data1_id = H5Mcreate(file1_id, H5_DATASET, DATA1_NAME);
|
|
ret = H5Dset_info (data1_id, t1_id, d1_id);
|
|
|
|
/* Write first dataset into HDF5_file */
|
|
|
|
ret = H5Dwrite(data1_id, H5P_ALL, data1);
|
|
|
|
/* Release all ID's and close the file */
|
|
|
|
ret = H5Mrelease(t1_id);
|
|
ret = H5Mrelease(d1_id);
|
|
ret = H5Mrelease(data1_id);
|
|
|
|
H5Fclose(file1_id);
|
|
|
|
/* Reopen the file to add second dataset */
|
|
|
|
file2_id = H5Fopen("HDF5_file", H5ACC_WRITE, 0);
|
|
|
|
|
|
/* Create and initialize datatype object for the second dataset */
|
|
|
|
t2_id = H5Mcreate(file2_id,H5_DATATYPE,"Double float data type");
|
|
ret = H5Tset_type(t2_id, DATA2_BASE, DATA2_LEN, DATA2_ARCH);
|
|
|
|
/* Create and initialize dimensionality object for the second dataset */
|
|
|
|
d2_id = H5Mcreate(file2_id, H5_DATASPACE, "1D");
|
|
ret = H5Pset_space(d2_id,DATA2_RANK, dims2);
|
|
|
|
/* Create and initialize second dataset object */
|
|
|
|
data2_id = H5Mcreate(file2_id, H5_DATASET, DATA2_NAME);
|
|
ret = H5Dset_info (data2_id, t2_id, d2_id);
|
|
|
|
/* Write second dataset into HDF5_file */
|
|
|
|
ret = H5Dwrite(data2_id, H5P_ALL, data2);
|
|
|
|
/* Release all ID's and close the file */
|
|
|
|
ret = H5Mrelease(t2_id);
|
|
ret = H5Mrelease(d2_id);
|
|
ret = H5Mrelease(data2_id);
|
|
|
|
ret = H5Fclose(file2_id);
|
|
|
|
}
|