diff options
Diffstat (limited to 'src/H5Defl.c')
| -rw-r--r-- | src/H5Defl.c | 74 |
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 |