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author | Elena Pourmal <epourmal@hdfgroup.org> | 1997-10-22 21:15:54 (GMT) |
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committer | Elena Pourmal <epourmal@hdfgroup.org> | 1997-10-22 21:15:54 (GMT) |
commit | 4fe5ac09995cf3c0a93d942b205c091d266fe258 (patch) | |
tree | 419cd8821b1a6d09ed2a3645ee3141c6001b64da /examples/test_read.c | |
parent | cca9fb56f7e3f94cf4588a6f7214a2170862f49d (diff) | |
download | hdf5-4fe5ac09995cf3c0a93d942b205c091d266fe258.zip hdf5-4fe5ac09995cf3c0a93d942b205c091d266fe258.tar.gz hdf5-4fe5ac09995cf3c0a93d942b205c091d266fe258.tar.bz2 |
[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.
Diffstat (limited to 'examples/test_read.c')
-rw-r--r-- | examples/test_read.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/examples/test_read.c b/examples/test_read.c new file mode 100644 index 0000000..7f70519 --- /dev/null +++ b/examples/test_read.c @@ -0,0 +1,98 @@ + +/* This program finds two datasets in HDF5 file created by test_write.c + program */ + +#include "hdf5.h" + +/* Define datasets names */ + + +#define DATA1_NAME "ShortIntegers" +#define DATA2_NAME "DoubleFloats" + +main(void) + +{ + + hid_t file_id; /* HDF5 file ID */ + + 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 */ + hid_t data1_type; /* Datatype of the first dataset */ + uint8 data1_len; /* Length in bytes for data1_type */ + uint8 data1_arch; /* Architecture format data1_type is in */ + uint32 data1_rank; /* Rank of the first dataset */ + + 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 */ + hid_t data2_type; /* Datatype of the first dataset */ + uint8 data2_len; /* Length in bytes for data2_type */ + uint8 data2_arch; /* Architecture format data2_type is in */ + uint32 data2_rank; /* Rank of the second dataset */ + + + herr_t ret; + hbool_t ret_file; + +/* Check if we have HDF5 file */ + + ret_file = H5Fis_hdf5("HDF5_file"); + if(ret_file == BTRUE) + printf("Is HDF5? yes\n"); + +/* Open HDF5 file */ + + file_id = H5Fopen("HDF5_file", 0, 0); + + +/* Find first dataset and return its dataset ID*/ + + data1_id = H5Mfind_name(file_id,H5_DATASET,DATA1_NAME); + +/* Return datatype and dimensionality IDs for the found dataset */ + + ret = H5Dget_info(data1_id, &t1_id, &d1_id); + +/* Get type, base length and architecture for the first data set */ + + ret = H5Tget_type(t1_id, &data1_type, &data1_len, &data1_arch); + printf("Base length and architecture for the first data set\n"); + printf("%u %u \n", data1_len, data1_arch); + +/* Get rank for the first data set */ + + data1_rank = H5Pget_lrank(d1_id); + printf("data1_rank %u\n", data1_rank); + +/* Find second dataset and return its dataset ID*/ + + data2_id = H5Mfind_name(file_id,H5_DATASET,DATA2_NAME); + +/* Return datatype and dimensionality IDs for the found dataset */ + + ret = H5Dget_info(data2_id, &t2_id, &d2_id); + +/* Get type, base length and architecture for the second data set */ + + ret = H5Tget_type(t2_id, &data2_type, &data2_len, &data2_arch); + printf(" Base length and architecture for the second data set\n"); + printf("%i %i \n", data2_len, data2_arch); + +/* Get rank for the second data set */ + + data2_rank = H5Pget_lrank(d2_id); + printf("data2_rank %u\n", data2_rank); + ret = H5Mrelease(t1_id); + ret = H5Mrelease(d1_id); + ret = H5Mrelease(data1_id); + + ret = H5Mrelease(t2_id); + ret = H5Mrelease(d2_id); + ret = H5Mrelease(data2_id); + + H5Fclose(file_id); + + +} |