[svn-r5138] Purpose:

    Bug Fix & Code Cleanup

Description:
    The MPI-IO optimized transfer routines
    (H5S_mpio_spaces_read/H5S_mpio_space_write) are not being invoked in all
    the cases where they could be used.

    Additionally, the code for determining if an optimized transfer is wrapped
    into the actual I/O transfer routine in a very confusing way.

Solution:
    Re-enabled MPI-IO optimized transfer routines in all the cases where they
    should work.

    Extracted all the pre-conditions for optimized transfers into separate
    routines from the transfer routines.

Platforms tested:
    FreeBSD 4.5 (sleipnir) & IRIX64 6.5 (modi4)

1 files changed, 42 insertions, 0 deletions

diff --git a/src/H5Spoint.c b/src/H5Spoint.c
index 5cb9079..7ca1bed 100644
--- a/src/H5Spoint.c
+++ b/src/H5Spoint.c
@@ -1167,6 +1167,48 @@ H5S_point_select_single(const H5S_t *space)
 
 /*--------------------------------------------------------------------------
  NAME
+    H5S_point_select_regular
+ PURPOSE
+    Check if a point selection is "regular"
+ USAGE
+    htri_t H5S_point_select_regular(space)
+        const H5S_t *space;     IN: Dataspace pointer to check
+ RETURNS
+    TRUE/FALSE/FAIL
+ DESCRIPTION
+    Checks to see if the current selection in a dataspace is the a regular
+    pattern.
+    This is primarily used for reading the entire selection in one swoop.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    Doesn't check for points selected to be next to one another in a regular
+    pattern yet.
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+htri_t
+H5S_point_select_regular(const H5S_t *space)
+{
+    htri_t ret_value=FAIL;  /* return value */
+
+    FUNC_ENTER (H5S_point_select_regular, FAIL);
+
+    /* Check args */
+    assert(space);
+
+    /* Only simple check for regular points for now... */
+    if(space->select.num_elem==1)
+    	ret_value=TRUE;
+    else
+    	ret_value=FALSE;
+
+done:
+    FUNC_LEAVE (ret_value);
+}   /* H5S_point_select_regular() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
     H5S_select_elements
  PURPOSE
     Specify a series of elements in the dataspace to select