diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/H5Pdcpl.c | 62 |
1 files changed, 59 insertions, 3 deletions
diff --git a/src/H5Pdcpl.c b/src/H5Pdcpl.c index bbdddde..33de459 100644 --- a/src/H5Pdcpl.c +++ b/src/H5Pdcpl.c @@ -1222,11 +1222,11 @@ done: * * Return: Non-negative on success/Negative on failure * - * Programmer: Kent Yang - * Wednesday, November 13, 2002 + * Programmer: Xiaowen Wu + * Wednesday, December 22, 2004 * * Modifications: - * Xiaowen Wu + * * *------------------------------------------------------------------------- */ @@ -1259,8 +1259,64 @@ H5Pset_nbit(hid_t plist_id) done: FUNC_LEAVE_API(ret_value); } /* end H5Pset_nbit() */ + +/*------------------------------------------------------------------------- + * Function: H5Pset_scaleoffset + * + * Purpose: Sets scaleoffset filter for a dataset creation property list + * and user-supplied minimum number of bits + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Xiaowen Wu + * Wednesday, February 9, 2005 + * + * Modifications: + * + * + *------------------------------------------------------------------------- + */ +herr_t +H5Pset_scaleoffset(hid_t plist_id, unsigned min_bits) +{ + H5O_pline_t pline; + H5P_genplist_t *plist; /* Property list pointer */ + unsigned cd_values[1]; /* Filter parameters */ + unsigned int config_flags; + herr_t ret_value=SUCCEED; /* return value */ + FUNC_ENTER_API(H5Pset_scaleoffset, FAIL); + H5TRACE2("e","iIu",plist_id,min_bits); + + /* Check arguments */ + if(TRUE != H5P_isa_class(plist_id, H5P_DATASET_CREATE)) + HGOTO_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset creation property list"); + + /* Get the plist structure */ + if(NULL == (plist = H5I_object(plist_id))) + HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID"); + + if(min_bits < 0) + HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "minimum number of bits can't be positive"); + + /* Set the parameter for the filter */ + /* if min_bits is zero, the scaleoffset filter will automatically calculate min_bits */ + cd_values[0] = min_bits; + + /* Add the scaleoffset filter */ + if(H5P_get(plist, H5D_CRT_DATA_PIPELINE_NAME, &pline) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get pipeline"); + if(H5Z_append(&pline, H5Z_FILTER_SCALEOFFSET, H5Z_FLAG_OPTIONAL, 1, cd_values)<0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to add scaleoffset filter to pipeline"); + if(H5P_set(plist, H5D_CRT_DATA_PIPELINE_NAME, &pline) < 0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to set pipeline"); + +done: + FUNC_LEAVE_API(ret_value); +} /* end H5Pset_scaleoffset() */ + + /*------------------------------------------------------------------------- * Function: H5Pset_fletcher32 * |