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https://github.com/HDFGroup/hdf5.git
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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.
99 lines
2.9 KiB
C
99 lines
2.9 KiB
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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