diff options
Diffstat (limited to 'src/H5Zshuffle.c')
| -rw-r--r-- | src/H5Zshuffle.c | 78 |
1 files changed, 74 insertions, 4 deletions
diff --git a/src/H5Zshuffle.c b/src/H5Zshuffle.c index bcadbc4..e82f1dc 100644 --- a/src/H5Zshuffle.c +++ b/src/H5Zshuffle.c @@ -12,10 +12,14 @@ * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ +#define H5Z_PACKAGE /*suppress error about including H5Zpkg */ + #include "H5private.h" /* Generic Functions */ #include "H5Eprivate.h" /* Error handling */ #include "H5MMprivate.h" /* Memory management */ -#include "H5Zprivate.h" /* Data filters */ +#include "H5Ppublic.h" /* Property lists */ +#include "H5Tpublic.h" /* Datatype functions */ +#include "H5Zpkg.h" /* Data filters */ #ifdef H5_HAVE_FILTER_SHUFFLE @@ -24,6 +28,72 @@ #define INTERFACE_INIT NULL static int interface_initialize_g = 0; +/* Local function prototypes */ +static herr_t H5Z_set_local_shuffle(hid_t dcpl_id, hid_t type_id, hid_t space_id); +static size_t H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, + const unsigned cd_values[], size_t nbytes, size_t *buf_size, void **buf); + +/* This message derives from H5Z */ +const H5Z_class_t H5Z_SHUFFLE[1] = {{ + H5Z_FILTER_SHUFFLE, /* Filter id number */ + "shuffle", /* Filter name for debugging */ + NULL, /* The "can apply" callback */ + H5Z_set_local_shuffle, /* The "set local" callback */ + H5Z_filter_shuffle, /* The actual filter function */ +}}; + +/* Local macros */ +#define H5Z_SHUFFLE_USER_NPARMS 0 /* Number of parameters that users can set */ +#define H5Z_SHUFFLE_TOTAL_NPARMS 1 /* Total number of parameters for filter */ +#define H5Z_SHUFFLE_PARM_SIZE 0 /* "Local" parameter for shuffling size */ + + +/*------------------------------------------------------------------------- + * Function: H5Z_set_local_shuffle + * + * Purpose: Set the "local" dataset parameter for data shuffling to be + * the size of the datatype. + * + * Return: Success: Non-negative + * Failure: Negative + * + * Programmer: Quincey Koziol + * Monday, April 7, 2003 + * + * Modifications: + * + *------------------------------------------------------------------------- + */ +static herr_t +H5Z_set_local_shuffle(hid_t dcpl_id, hid_t type_id, hid_t UNUSED space_id) +{ + unsigned flags; /* Filter flags */ + size_t cd_nelmts=H5Z_SHUFFLE_USER_NPARMS; /* Number of filter parameters */ + unsigned cd_values[H5Z_SHUFFLE_TOTAL_NPARMS]; /* Filter parameters */ + herr_t ret_value=SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI(H5Z_set_local_shuffle, FAIL); + + /* Get the filter's current parameters */ + if(H5Pget_filter_by_id(dcpl_id,H5Z_FILTER_SHUFFLE,&flags,&cd_nelmts, cd_values,0,NULL)<0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get shuffle parameters"); + + /* Check that no parameters are currently set */ + if(cd_nelmts!=H5Z_SHUFFLE_USER_NPARMS) + HGOTO_ERROR(H5E_PLINE, H5E_BADVALUE, FAIL, "incorrect # of shuffle parameters"); + + /* Set "local" parameter for this dataset */ + if((cd_values[H5Z_SHUFFLE_PARM_SIZE]=H5Tget_size(type_id))==0) + HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size"); + + /* Modify the filter's parameters for this dataset */ + if(H5Pmodify_filter(dcpl_id, H5Z_FILTER_SHUFFLE, flags, H5Z_SHUFFLE_TOTAL_NPARMS, cd_values)<0) + HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local shuffle parameters"); + +done: + FUNC_LEAVE_NOAPI(ret_value); +} /* end H5Z_set_local_shuffle() */ + /*------------------------------------------------------------------------- * Function: H5Z_filter_shuffle @@ -47,7 +117,7 @@ static int interface_initialize_g = 0; * *------------------------------------------------------------------------- */ -size_t +static size_t H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, const unsigned cd_values[], size_t nbytes, size_t *buf_size, void **buf) { @@ -63,11 +133,11 @@ H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, const unsigned cd_values[], FUNC_ENTER_NOAPI(H5Z_filter_shuffle, 0); /* Check arguments */ - if (cd_nelmts!=1 || cd_values[0]==0) + if (cd_nelmts!=H5Z_SHUFFLE_TOTAL_NPARMS || cd_values[H5Z_SHUFFLE_PARM_SIZE]==0) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid shuffle parameters"); /* Get the number of bytes per element from the parameter block */ - bytesoftype=cd_values[0]; + bytesoftype=cd_values[H5Z_SHUFFLE_PARM_SIZE]; /* Don't do anything for 1-byte elements */ if(bytesoftype>1) { |