From 4fe5ac09995cf3c0a93d942b205c091d266fe258 Mon Sep 17 00:00:00 2001
From: Elena Pourmal <epourmal@hdfgroup.org>
Date: Wed, 22 Oct 1997 16:15:54 -0500
Subject: [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.
---
 examples/test_read.c  |  98 +++++++++++++++++++++++++++++++++++++
 examples/test_write.c | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 228 insertions(+)
 create mode 100644 examples/test_read.c
 create mode 100644 examples/test_write.c

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);
+
+
+}
diff --git a/examples/test_write.c b/examples/test_write.c
new file mode 100644
index 0000000..15421b7
--- /dev/null
+++ b/examples/test_write.c
@@ -0,0 +1,130 @@
+
+/* 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);
+
+}
-- 
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