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authorElena Pourmal <epourmal@hdfgroup.org>1997-10-22 21:15:54 (GMT)
committerElena Pourmal <epourmal@hdfgroup.org>1997-10-22 21:15:54 (GMT)
commit4fe5ac09995cf3c0a93d942b205c091d266fe258 (patch)
tree419cd8821b1a6d09ed2a3645ee3141c6001b64da /examples/test_write.c
parentcca9fb56f7e3f94cf4588a6f7214a2170862f49d (diff)
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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.
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diff --git a/examples/test_write.c b/examples/test_write.c
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+
+/* 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);
+
+}