[svn-r16356] Description:

	Bring r16354 back from trunk:

        Refactor internal layout information, making it easier to add another
type of chunk index.

Tested on:
	FreeBSD/32 (duty)
	(other configurations tested with original change)

1 files changed, 31 insertions, 0 deletions

diff --git a/src/H5Dcontig.c b/src/H5Dcontig.c
index 4b7a5df..112eea5 100644
--- a/src/H5Dcontig.c
+++ b/src/H5Dcontig.c
@@ -63,6 +63,7 @@
 /* Layout operation callbacks */
 static herr_t H5D_contig_new(H5F_t *f, hid_t dapl_id, hid_t dxpl_id, H5D_t *dset,
     const H5P_genplist_t *dc_plist);
+static hbool_t H5D_contig_is_space_alloc(const H5O_layout_t *layout);
 static herr_t H5D_contig_io_init(const H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space,
     H5D_chunk_map_t *cm);
@@ -79,6 +80,7 @@ static herr_t H5D_contig_write_one(H5D_io_info_t *io_info, hsize_t offset,
 /* Contiguous storage layout I/O ops */
 const H5D_layout_ops_t H5D_LOPS_CONTIG[1] = {{
     H5D_contig_new,
+    H5D_contig_is_space_alloc,
     H5D_contig_io_init,
     H5D_contig_read,
     H5D_contig_write,
@@ -413,6 +415,35 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5D_contig_is_space_alloc
+ *
+ * Purpose:	Query if space is allocated for layout
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Thursday, January 15, 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+static hbool_t
+H5D_contig_is_space_alloc(const H5O_layout_t *layout)
+{
+    hbool_t ret_value;                  /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5D_contig_is_space_alloc)
+
+    /* Sanity checks */
+    HDassert(layout);
+
+    /* Set return value */
+    ret_value = (hbool_t)H5F_addr_defined(layout->u.contig.addr);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D_contig_is_space_alloc() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5D_contig_io_init
  *
  * Purpose:	Performs initialization before any sort of I/O on the raw data