[svn-r14307] Description:

    - Extracted common code from H5D_select_read/H5D_select_write into single
        routine (H5D_select_io) and made H5D_select_read/H5D_select_write
        "gateway" routines, passing I/O buffer to operate on in "op" struct.
    - Create optimized pathway in H5D_select_io for I/O operations on single
        elements.
    - Make "get linear offset of first element" callback for each type of
        selection (used in "optimized pathway", above)

Tested on:
        FreeBSD/32 6.2 (duty) in debug mode
        FreeBSD/64 6.2 (liberty) w/C++ & FORTRAN, in debug mode
        Linux/32 2.6 (kagiso) w/PGI compilers, w/C++ & FORTRAN, w/threadsafe,
                                in debug mode
        Linux/64-amd64 2.6 (smirom) w/default API=1.6.x, w/C++ & FORTRAN,
                                in production mode
        Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN,
                                in production mode
        Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN,
                                w/szip filter, in production mode
        Mac OS X/32 10.4.10 (amazon) in debug mode
        Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode

1 files changed, 38 insertions, 3 deletions

diff --git a/src/H5Snone.c b/src/H5Snone.c
index 89a1875..88ab67f 100644
--- a/src/H5Snone.c
+++ b/src/H5Snone.c
@@ -43,6 +43,7 @@ static hssize_t H5S_none_serial_size(const H5S_t *space);
 static herr_t H5S_none_serialize(const H5S_t *space, uint8_t *buf);
 static herr_t H5S_none_deserialize(H5S_t *space, const uint8_t *buf);
 static herr_t H5S_none_bounds(const H5S_t *space, hsize_t *start, hsize_t *end);
+static herr_t H5S_none_offset(const H5S_t *space, hsize_t *off);
 static htri_t H5S_none_is_contiguous(const H5S_t *space);
 static htri_t H5S_none_is_single(const H5S_t *space);
 static htri_t H5S_none_is_regular(const H5S_t *space);
@@ -71,6 +72,7 @@ const H5S_select_class_t H5S_sel_none[1] = {{
     H5S_none_serialize,
     H5S_none_deserialize,
     H5S_none_bounds,
+    H5S_none_offset,
     H5S_none_is_contiguous,
     H5S_none_is_single,
     H5S_none_is_regular,
@@ -565,11 +567,43 @@ H5S_none_bounds(const H5S_t UNUSED *space, hsize_t UNUSED *start, hsize_t UNUSED
 
 /*--------------------------------------------------------------------------
  NAME
+    H5S_none_offset
+ PURPOSE
+    Gets the linear offset of the first element for the selection.
+ USAGE
+    herr_t H5S_none_offset(space, offset)
+        const H5S_t *space;     IN: Dataspace pointer of selection to query
+        hsize_t *offset;        OUT: Linear offset of first element in selection
+ RETURNS
+    Non-negative on success, negative on failure
+ DESCRIPTION
+    Retrieves the linear offset (in "units" of elements) of the first element
+    selected within the dataspace.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    Calling this function on a "none" selection returns fail.
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5S_none_offset(const H5S_t *space, hsize_t *offset)
+{
+    FUNC_ENTER_NOAPI_NOFUNC(H5S_none_offset)
+
+    HDassert(space);
+    HDassert(offset);
+
+    FUNC_LEAVE_NOAPI(FAIL)
+}   /* H5S_none_offset() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
     H5S_none_is_contiguous
  PURPOSE
     Check if a "none" selection is contiguous within the dataspace extent.
  USAGE
-    htri_t H5S_all_is_contiguous(space)
+    htri_t H5S_none_is_contiguous(space)
         H5S_t *space;           IN: Dataspace pointer to check
  RETURNS
     TRUE/FALSE/FAIL
@@ -767,7 +801,7 @@ done:
  PURPOSE
     Create a list of offsets & lengths for a selection
  USAGE
-    herr_t H5S_all_get_seq_list(space,flags,iter,maxseq,maxelem,nseq,nelem,off,len)
+    herr_t H5S_none_get_seq_list(space,flags,iter,maxseq,maxelem,nseq,nelem,off,len)
         H5S_t *space;           IN: Dataspace containing selection to use.
         unsigned flags;         IN: Flags for extra information about operation
         H5S_sel_iter_t *iter;   IN/OUT: Selection iterator describing last
@@ -816,4 +850,5 @@ H5S_none_get_seq_list(const H5S_t UNUSED *space, unsigned UNUSED flags, H5S_sel_
     *nelem=0;
 
     FUNC_LEAVE_NOAPI(SUCCEED);
-} /* end H5S_all_get_seq_list() */
+} /* end H5S_none_get_seq_list() */
+