[svn-r15131] Description:

	Finish omnibus chunked dataset I/O refactoring, to separate general
actions on chunked datasets from actions that are specific to using the v1
B-tree index.

	Cleaned up a few bugs and added some additional tests also.

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 10.5.2 (amazon) in debug mode
        Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode

1 files changed, 74 insertions, 0 deletions

diff --git a/src/H5Defl.c b/src/H5Defl.c
index 7dac29b..15bcd60 100644
--- a/src/H5Defl.c
+++ b/src/H5Defl.c
@@ -49,6 +49,8 @@
 /********************/
 
 /* Layout operation callbacks */
+static herr_t H5D_efl_new(H5F_t *f, hid_t dxpl_id, H5D_t *dset,
+    const H5P_genplist_t *dc_plist);
 static herr_t H5D_efl_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);
@@ -72,6 +74,7 @@ static herr_t H5D_efl_write(const H5O_efl_t *efl, haddr_t addr, size_t size,
 
 /* External File List (EFL) storage layout I/O ops */
 const H5D_layout_ops_t H5D_LOPS_EFL[1] = {{
+    H5D_efl_new,
     H5D_efl_io_init,
     H5D_contig_read,
     H5D_contig_write,
@@ -92,6 +95,77 @@ const H5D_layout_ops_t H5D_LOPS_EFL[1] = {{
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5D_efl_new
+ *
+ * Purpose:	Constructs new EFL layout information for dataset
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Thursday, May 22, 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D_efl_new(H5F_t *f, hid_t UNUSED dxpl_id, H5D_t *dset,
+    const H5P_genplist_t *dc_plist)
+{
+    const H5T_t *type = dset->shared->type;     /* Convenience pointer to dataset's datatype */
+    hsize_t dim[H5O_LAYOUT_NDIMS];	/* Current size of data in elements */
+    hsize_t max_dim[H5O_LAYOUT_NDIMS];  /* Maximum size of data in elements */
+    hssize_t tmp_size;                  /* Temporary holder for raw data size */
+    hsize_t max_points;                 /* Maximum elements */
+    hsize_t max_storage;                /* Maximum storage size */
+    int ndims;                          /* Rank of dataspace */
+    int i;                              /* Local index variable */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT(H5D_efl_new)
+
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(dset);
+    HDassert(dc_plist);
+
+    /*
+     * The maximum size of the dataset cannot exceed the storage size.
+     * Also, only the slowest varying dimension of a simple data space
+     * can be extendible (currently only for external data storage).
+     */
+    dset->shared->layout.u.contig.addr = HADDR_UNDEF;        /* Initialize to no address */
+
+    /* Check for invalid dataset dimensions */
+    if((ndims = H5S_get_simple_extent_dims(dset->shared->space, dim, max_dim)) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize contiguous storage")
+    for(i = 1; i < ndims; i++)
+        if(max_dim[i] > dim[i])
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "only the first dimension can be extendible")
+
+    /* Check for storage overflows */
+    max_points = H5S_get_npoints_max(dset->shared->space);
+    max_storage = H5O_efl_total_size(&dset->shared->dcpl_cache.efl);
+    if(H5S_UNLIMITED == max_points) {
+        if(H5O_EFL_UNLIMITED != max_storage)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unlimited data space but finite storage")
+    } /* end if */
+    else if(max_points * H5T_get_size(type) < max_points)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "data space * type size overflowed")
+    else if(max_points * H5T_get_size(type) > max_storage)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "data space size exceeds external storage size")
+
+    /* Compute the total size of dataset */
+    tmp_size = H5S_GET_EXTENT_NPOINTS(dset->shared->space) * H5T_get_size(type);
+    H5_ASSIGN_OVERFLOW(dset->shared->layout.u.contig.size, tmp_size, hssize_t, hsize_t);
+
+    /* Get the sieve buffer size for this dataset */
+    dset->shared->cache.contig.sieve_buf_size = H5F_SIEVE_BUF_SIZE(f);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D_efl_new() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5D_efl_io_init
  *
  * Purpose:	Performs initialization before any sort of I/O on the raw data