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[svn-r132] Examples directory 'examples' was added. It contains two programs
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.
This commit is contained in:
Elena Pourmal
parent
cca9fb56f7
commit
4fe5ac0999
98
examples/test_read.c
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98
examples/test_read.c
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/* This program finds two datasets in HDF5 file created by test_write.c
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program */
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#include "hdf5.h"
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/* Define datasets names */
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#define DATA1_NAME "ShortIntegers"
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#define DATA2_NAME "DoubleFloats"
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main(void)
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{
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hid_t file_id; /* HDF5 file ID */
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hid_t t1_id; /* Type ID for the first dataset */
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hid_t d1_id; /* Dimensionality ID for the first dataset */
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hid_t data1_id; /* Data ID for the first dataset */
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hid_t data1_type; /* Datatype of the first dataset */
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uint8 data1_len; /* Length in bytes for data1_type */
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uint8 data1_arch; /* Architecture format data1_type is in */
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uint32 data1_rank; /* Rank of the first dataset */
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hid_t t2_id; /* Type ID for the second dataset */
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hid_t d2_id; /* Dimensionality ID for the second dataset */
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hid_t data2_id; /* Data ID for the second dataset */
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hid_t data2_type; /* Datatype of the first dataset */
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uint8 data2_len; /* Length in bytes for data2_type */
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uint8 data2_arch; /* Architecture format data2_type is in */
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uint32 data2_rank; /* Rank of the second dataset */
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herr_t ret;
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hbool_t ret_file;
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/* Check if we have HDF5 file */
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ret_file = H5Fis_hdf5("HDF5_file");
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if(ret_file == BTRUE)
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printf("Is HDF5? yes\n");
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/* Open HDF5 file */
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file_id = H5Fopen("HDF5_file", 0, 0);
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/* Find first dataset and return its dataset ID*/
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data1_id = H5Mfind_name(file_id,H5_DATASET,DATA1_NAME);
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/* Return datatype and dimensionality IDs for the found dataset */
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ret = H5Dget_info(data1_id, &t1_id, &d1_id);
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/* Get type, base length and architecture for the first data set */
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ret = H5Tget_type(t1_id, &data1_type, &data1_len, &data1_arch);
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printf("Base length and architecture for the first data set\n");
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printf("%u %u \n", data1_len, data1_arch);
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/* Get rank for the first data set */
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data1_rank = H5Pget_lrank(d1_id);
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printf("data1_rank %u\n", data1_rank);
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/* Find second dataset and return its dataset ID*/
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data2_id = H5Mfind_name(file_id,H5_DATASET,DATA2_NAME);
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/* Return datatype and dimensionality IDs for the found dataset */
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ret = H5Dget_info(data2_id, &t2_id, &d2_id);
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/* Get type, base length and architecture for the second data set */
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ret = H5Tget_type(t2_id, &data2_type, &data2_len, &data2_arch);
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printf(" Base length and architecture for the second data set\n");
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printf("%i %i \n", data2_len, data2_arch);
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/* Get rank for the second data set */
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data2_rank = H5Pget_lrank(d2_id);
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printf("data2_rank %u\n", data2_rank);
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ret = H5Mrelease(t1_id);
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ret = H5Mrelease(d1_id);
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ret = H5Mrelease(data1_id);
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ret = H5Mrelease(t2_id);
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ret = H5Mrelease(d2_id);
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ret = H5Mrelease(data2_id);
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H5Fclose(file_id);
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}
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130
examples/test_write.c
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examples/test_write.c
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/* This program creates two datasets and stores them in HDF5 file */
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#include "hdf5.h"
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/* Define data type, dimensionlity, architecture and name for the first
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dataset */
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#define DATA1_BASE H5T_INT
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#define DATA1_LEN 2
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#define DATA1_RANK 2
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#define DATA1_DIM1 10
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#define DATA1_DIM2 5
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#define DATA1_ARCH H5T_BIGENDIAN
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#define DATA1_NAME "ShortIntegers"
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/* Define data type, dimensionality, architecture and name for the second
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dataset */
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#define DATA2_BASE H5T_FLOAT
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#define DATA2_LEN 8
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#define DATA2_RANK 1
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#define DATA2_DIM1 8
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#define DATA2_ARCH H5T_LITTLEENDIAN
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#define DATA2_NAME "DoubleFloats"
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main(void)
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{
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hid_t file1_id, file2_id; /* HDF5 file IDs */
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hid_t t1_id; /* Type ID for the first dataset */
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hid_t d1_id; /* Dimensionality ID for the first dataset */
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hid_t data1_id; /* Data ID for the first dataset */
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uint32 dims1[DATA1_RANK] = {DATA1_DIM1, DATA1_DIM2};
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int16 data1[DATA1_DIM1][DATA1_DIM2];
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hid_t t2_id; /* Type ID for the second dataset */
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hid_t d2_id; /* Dimensionality ID for the second dataset */
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hid_t data2_id; /* Data ID for the second dataset */
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uint32 dims2[DATA2_RANK] = {DATA2_DIM1};
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float64 data2[DATA2_DIM1];
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herr_t ret;
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intn k,l;
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/* Initialize datasets */
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for (k=0; k<DATA1_DIM1; k++) {
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for (l=0; l<DATA1_DIM2; l++) {
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data1[k][l] = (k+l);
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}
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}
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for (k=0; k<DATA2_DIM1; k++) {
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data2[k] = (double) (k);
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}
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/* Create HDF5 file */
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file1_id = H5Fcreate("HDF5_file", H5ACC_OVERWRITE,0,0);
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/* Create and initialize datatype object for the first dataset */
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t1_id = H5Mcreate(file1_id,H5_DATATYPE,"Short Integer data type");
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ret = H5Tset_type(t1_id, DATA1_BASE, DATA1_LEN, DATA1_ARCH);
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/* Create and initialize dimensionality object for the first dataset */
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d1_id = H5Mcreate(file1_id, H5_DATASPACE, "2D");
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ret = H5Pset_space(d1_id,DATA1_RANK, dims1);
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/* Create and initialize first dataset object */
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data1_id = H5Mcreate(file1_id, H5_DATASET, DATA1_NAME);
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ret = H5Dset_info (data1_id, t1_id, d1_id);
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/* Write first dataset into HDF5_file */
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ret = H5Dwrite(data1_id, H5P_ALL, data1);
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/* Release all ID's and close the file */
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ret = H5Mrelease(t1_id);
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ret = H5Mrelease(d1_id);
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ret = H5Mrelease(data1_id);
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H5Fclose(file1_id);
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/* Reopen the file to add second dataset */
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file2_id = H5Fopen("HDF5_file", H5ACC_WRITE, 0);
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/* Create and initialize datatype object for the second dataset */
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t2_id = H5Mcreate(file2_id,H5_DATATYPE,"Double float data type");
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ret = H5Tset_type(t2_id, DATA2_BASE, DATA2_LEN, DATA2_ARCH);
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/* Create and initialize dimensionality object for the second dataset */
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d2_id = H5Mcreate(file2_id, H5_DATASPACE, "1D");
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ret = H5Pset_space(d2_id,DATA2_RANK, dims2);
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/* Create and initialize second dataset object */
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data2_id = H5Mcreate(file2_id, H5_DATASET, DATA2_NAME);
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ret = H5Dset_info (data2_id, t2_id, d2_id);
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/* Write second dataset into HDF5_file */
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ret = H5Dwrite(data2_id, H5P_ALL, data2);
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/* Release all ID's and close the file */
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ret = H5Mrelease(t2_id);
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ret = H5Mrelease(d2_id);
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ret = H5Mrelease(data2_id);
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ret = H5Fclose(file2_id);
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}
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