From 97a2a55cf4a27e6fc15a43f3ffaba9f90dc42be4 Mon Sep 17 00:00:00 2001
From: Binh-Minh Ribler <bmribler@hdfgroup.org>
Date: Thu, 16 May 2002 09:03:53 -0500
Subject: [svn-r5427] Purpose:     New Feature - per library change

Description:
    Added new member function DataSet::fillMemBuf for the new
    C API H5Dfill.  Quincey's description of H5Dfill is as followed:

    Added new H5Dfill() routine to fill the elements in a selection for a
    memory buffer with a fill value.  This is a user API wrapper around some
    internal routines which were needed for the fill-value modifications
    from Raymond as well as Pedro's code for reducing the size of a chunked
    dataset.

Platforms:
    SunOS 5.7 (arabica)
    Linux 6.2 (eirene)
---
 c++/src/H5DataSet.cpp | 41 +++++++++++++++++++++++++++++++++++++++++
 c++/src/H5DataSet.h   | 10 +++++++---
 2 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/c++/src/H5DataSet.cpp b/c++/src/H5DataSet.cpp
index 9817b17..615252d 100644
--- a/c++/src/H5DataSet.cpp
+++ b/c++/src/H5DataSet.cpp
@@ -180,6 +180,47 @@ void DataSet::extend( const hsize_t* size ) const
    }
 }
 
+/*--------------------------------------------------------------------------
+ NAME
+    fillMemBuf
+ PURPOSE 
+    Fills a selection in memory with a value
+ USAGE
+    fillMemBuf(fill, fill_type, buf, buf_type, space)
+    fillMemBuf(buf, buf_type, space)
+        void *buf;              IN/OUT: Memory buffer to fill selection within
+        DataType& buf_type;     IN: Datatype of the elements in buffer
+        DataSpace& space;       IN: Dataspace describing memory buffer &
+                                    containing selection to use.
+        const void *fill;       IN: Pointer to fill value to use - default NULL
+        DataType& fill_type;    IN: Datatype of the fill value
+ DESCRIPTION
+    Use the selection in the dataspace to fill elements in a memory buffer.
+ COMMENTS, BUGS, ASSUMPTIONS
+    Second usage uses all zeros as fill value
+--------------------------------------------------------------------------*/
+void DataSet::fillMemBuf(const void *fill, DataType& fill_type, void *buf, DataType& buf_type, DataSpace& space)
+{
+    hid_t fill_type_id = fill_type.getId();
+    hid_t buf_type_id = buf_type.getId();
+    hid_t space_id = space.getId();
+    herr_t ret_value = H5Dfill(fill, fill_type_id, buf, buf_type_id, space_id);
+    if( ret_value < 0 )
+    {
+	throw DataSetIException("DataSet::fillMemBuf", "H5Dfill failed");
+    }
+}
+void DataSet::fillMemBuf(void *buf, DataType& buf_type, DataSpace& space)
+{
+    hid_t buf_type_id = buf_type.getId();
+    hid_t space_id = space.getId();
+    herr_t ret_value = H5Dfill(NULL, buf_type_id, buf, buf_type_id, space_id);
+    if( ret_value < 0 )
+    {
+	throw DataSetIException("DataSet::fillMemBuf", "H5Dfill failed");
+    }
+}
+
 // This private function calls the C API H5Dclose to close this dataset.
 // Used by IdComponent::reset
 void DataSet::p_close() const
diff --git a/c++/src/H5DataSet.h b/c++/src/H5DataSet.h
index c860d3f..dba39b0 100644
--- a/c++/src/H5DataSet.h
+++ b/c++/src/H5DataSet.h
@@ -39,10 +39,14 @@ class __DLLCPP__ DataSet : public AbstractDs {
 	// Extends the dataset with unlimited dimension.
 	void extend( const hsize_t* size ) const;
 
+	// Fills a selection in memory with a value
+	void fillMemBuf(const void *fill, DataType& fill_type, void *buf, DataType& buf_type, DataSpace& space);
+	// Fills a selection in memory with zero 
+	void fillMemBuf(void *buf, DataType& buf_type, DataSpace& space);
+
 	// Creates a copy of an existing DataSet using its id
-	// (used only by template functions in FGtemplates.h
-	// to return a DataSet, will not be published; Note: should use
-	// friend template function)
+	// Note: used by CommonFG to return a DataSet; should be modified
+	// to use friend template function instead)
 	DataSet( const hid_t dataset_id );
 
 	// Used by the API to appropriately close a dataset
-- 
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