summaryrefslogtreecommitdiffstats
path: root/src/H5Znbit.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/H5Znbit.c')
-rw-r--r--src/H5Znbit.c288
1 files changed, 152 insertions, 136 deletions
diff --git a/src/H5Znbit.c b/src/H5Znbit.c
index 77c0c51..60eebe7 100644
--- a/src/H5Znbit.c
+++ b/src/H5Znbit.c
@@ -16,22 +16,21 @@
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
-#include "H5Fprivate.h" /* File access */
#include "H5MMprivate.h" /* Memory management */
-#include "H5Oprivate.h" /* Object headers */
#include "H5Ppublic.h" /* Property lists */
+#include "H5Oprivate.h" /* Object headers */
#include "H5Tpublic.h" /* Datatype functions */
#include "H5Zpkg.h" /* Data filters */
#ifdef H5_HAVE_FILTER_NBIT
-/* Struct of parameters needed for compressing one atomic datatype */
+/* Struct of parameters needed for compressing/decompressing one atomic datatype */
typedef struct {
- size_t sizeof_datatype;
+ size_t size;
int order;
int precision;
int offset;
-} parms_atomic;
+} parms_atomic;
/* Local function prototypes */
static herr_t H5Z_can_apply_nbit(hid_t dcpl_id, hid_t type_id, hid_t space_id);
@@ -39,13 +38,13 @@ static herr_t H5Z_set_local_nbit(hid_t dcpl_id, hid_t type_id, hid_t space_id);
static size_t H5Z_filter_nbit(unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
size_t nbytes, size_t *buf_size, void **buf);
-void H5Z_calc_parms_Tatomic(void);
-static herr_t H5Z_calc_parms_Tarray(hid_t type_id);
-static herr_t H5Z_calc_parms_Tcompound(hid_t type_id);
+static void H5Z_calc_parms_atomic(void);
+static herr_t H5Z_calc_parms_array(hid_t type_id);
+static herr_t H5Z_calc_parms_compound(hid_t type_id);
-static herr_t H5Z_set_parms_Tatomic(hid_t type_id, unsigned cd_values[]);
-static herr_t H5Z_set_parms_Tarray(hid_t type_id, unsigned cd_values[]);
-static herr_t H5Z_set_parms_Tcompound(hid_t type_id, unsigned cd_values[]);
+static herr_t H5Z_set_parms_atomic(hid_t type_id, unsigned cd_values[]);
+static herr_t H5Z_set_parms_array(hid_t type_id, unsigned cd_values[]);
+static herr_t H5Z_set_parms_compound(hid_t type_id, unsigned cd_values[]);
void H5Z_nbit_next_byte(size_t *j, int *buf_len);
void H5Z_nbit_decompress_one_byte(void *data, size_t data_offset, int k, int begin_i,
@@ -58,7 +57,7 @@ void H5Z_nbit_decompress_one_array(void *data, size_t data_offset, unsigned char
size_t *j, int *buf_len, const unsigned parms[]);
void H5Z_nbit_decompress_one_compound(void *data, size_t data_offset, unsigned char *buffer,
size_t *j, int *buf_len, const unsigned parms[]);
-void H5Z_nbit_decompress(void *data, hsize_t d_nelmts, unsigned char *buffer,
+void H5Z_nbit_decompress(void *data, unsigned d_nelmts, unsigned char *buffer,
const unsigned parms[]);
void H5Z_nbit_compress_one_atomic(void *data, size_t data_offset, unsigned char *buffer,
size_t *j, int *buf_len, parms_atomic p);
@@ -66,20 +65,9 @@ void H5Z_nbit_compress_one_array(void *data, size_t data_offset, unsigned char *
size_t *j, int *buf_len, const unsigned parms[]);
void H5Z_nbit_compress_one_compound(void *data, size_t data_offset, unsigned char *buffer,
size_t *j, int *buf_len, const unsigned parms[]);
-void H5Z_nbit_compress(void *data, hsize_t d_nelmts, unsigned char *buffer,
+void H5Z_nbit_compress(void *data, unsigned d_nelmts, unsigned char *buffer,
size_t *buffer_size, const unsigned parms[]);
-/* Global variables
- * cd_values_index: index of array cd_values
- * cd_values_actual_nparms: number of valid entries in array cd_values
- * parms_index: index of array parms
- * compress_ratio_is_zero: flag indicating no need to do nbit filter
- */
-static unsigned int cd_values_index = 0;
-static unsigned int cd_values_actual_nparms = 0;
-static unsigned int parms_index = 0;
-static unsigned char compress_ratio_is_zero;
-
/* This message derives from H5Z */
H5Z_class_t H5Z_NBIT[1] = {{
H5Z_CLASS_T_VERS, /* H5Z_class_t version */
@@ -95,16 +83,27 @@ H5Z_class_t H5Z_NBIT[1] = {{
/* Local macros */
#define FALSE 0
#define TRUE 1
-
-#define H5Z_NBIT_ATOMIC 1 /* Atomic datatype class for nbit */
-#define H5Z_NBIT_ARRAY 2 /* Array datatype class for nbit */
-#define H5Z_NBIT_COMPOUND 3 /* Compound datatype class for nbit */
-
+#define H5Z_NBIT_ATOMIC 1 /* Atomic datatype class for nbit */
+#define H5Z_NBIT_ARRAY 2 /* Array datatype class for nbit */
+#define H5Z_NBIT_COMPOUND 3 /* Compound datatype class for nbit */
#define H5Z_NBIT_USER_NPARMS 0 /* Number of parameters that users can set */
#define H5Z_NBIT_MAX_NPARMS 4096 /* Max number of parameters for filter */
-
-#define H5Z_NBIT_ORDER_BE 20 /* "Local" parameter for datatype byte order */
-#define H5Z_NBIT_ORDER_LE 10 /* "Local" parameter for datatype byte order */
+#define H5Z_NBIT_ORDER_LE 0 /* Little endian for datatype byte order */
+#define H5Z_NBIT_ORDER_BE 1 /* Big endian for datatype byte order */
+
+/* Local variables */
+/*
+ * cd_values_index: index of array cd_values inside function H5Z_set_local_nbit
+ * cd_values_actual_nparms: number of valid entries in array cd_values[]
+ * stored as first entry in the filter's cd_values[]
+ * compress_ratio_is_zero: flag if TRUE indicating no need to do nbit filter
+ * stored as second entry in the filter's cd_values[]
+ * parms_index: index of array parms[] used by compression/decompression functions
+ */
+static unsigned int cd_values_index = 0;
+static unsigned int cd_values_actual_nparms = 0;
+static unsigned char compress_ratio_is_zero = FALSE;
+static unsigned int parms_index = 0;
/*-------------------------------------------------------------------------
@@ -143,7 +142,7 @@ H5Z_can_apply_nbit(hid_t UNUSED dcpl_id, hid_t type_id, hid_t UNUSED space_id)
if((dtype_size = H5Tget_size(type_id)) == 0)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
- /* codes below have to been updated to adjust to array and compound datatype */
+ /* Codes below do not apply to array or compound datatype */
if(dtype_class == H5T_INTEGER || dtype_class == H5T_FLOAT) {
/* Get datatype's endianness order */
if((dtype_order = H5Tget_order(type_id)) == H5T_ORDER_ERROR)
@@ -160,7 +159,7 @@ done:
/*-------------------------------------------------------------------------
- * Function: H5Z_calc_parms_Tatomic
+ * Function: H5Z_calc_parms_atomic
*
* Purpose: Calculate the number of parameters of cd_values[]
* of atomic datatype whose datatype class is integer
@@ -176,7 +175,7 @@ done:
*
*-------------------------------------------------------------------------
*/
-void H5Z_calc_parms_Tatomic()
+static void H5Z_calc_parms_atomic()
{
/* Store datatype class code */
++cd_values_actual_nparms;
@@ -196,7 +195,7 @@ void H5Z_calc_parms_Tatomic()
/*-------------------------------------------------------------------------
- * Function: H5Z_calc_parms_Tarray
+ * Function: H5Z_calc_parms_array
*
* Purpose: Calculate the number of parameters of cd_values[]
* for given a certain datatype identifier type_id
@@ -212,13 +211,13 @@ void H5Z_calc_parms_Tatomic()
*
*-------------------------------------------------------------------------
*/
-static herr_t H5Z_calc_parms_Tarray(hid_t type_id)
+static herr_t H5Z_calc_parms_array(hid_t type_id)
{
hid_t dtype_base; /* Array datatype's base datatype */
H5T_class_t dtype_base_class; /* Array datatype's base datatype's class */
herr_t ret_value=SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI(H5Z_calc_parms_Tarray, FAIL)
+ FUNC_ENTER_NOAPI(H5Z_calc_parms_array, FAIL)
/* Store datatype class code */
++cd_values_actual_nparms;
@@ -237,22 +236,22 @@ static herr_t H5Z_calc_parms_Tarray(hid_t type_id)
/* Calculate number of the rest parameters according to base datatype's class */
switch(dtype_base_class) {
case H5T_INTEGER:
- case H5T_FLOAT: H5Z_calc_parms_Tatomic();
+ case H5T_FLOAT: H5Z_calc_parms_atomic();
break;
- case H5T_ARRAY: H5Z_calc_parms_Tarray(dtype_base);
+ case H5T_ARRAY: H5Z_calc_parms_array(dtype_base);
break;
- case H5T_COMPOUND:H5Z_calc_parms_Tcompound(dtype_base);
+ case H5T_COMPOUND:H5Z_calc_parms_compound(dtype_base);
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype class not supported by nbit")
} /* end switch */
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Z_calc_parms_Tarray() */
+} /* end H5Z_calc_parms_array() */
/*-------------------------------------------------------------------------
- * Function: H5Z_calc_parms_Tcompound
+ * Function: H5Z_calc_parms_compound
*
* Purpose: Calculate the number of parameters of cd_values[]
* for given a certain datatype identifier type_id
@@ -268,7 +267,7 @@ done:
*
*-------------------------------------------------------------------------
*/
-static herr_t H5Z_calc_parms_Tcompound(hid_t type_id)
+static herr_t H5Z_calc_parms_compound(hid_t type_id)
{
int i; /* local index variable */
int nmembers; /* Compound datatype's number of members */
@@ -276,7 +275,7 @@ static herr_t H5Z_calc_parms_Tcompound(hid_t type_id)
H5T_class_t dtype_member_class; /* Compound datatype's member datatype's class */
herr_t ret_value=SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI(H5Z_calc_parms_Tcompound, FAIL)
+ FUNC_ENTER_NOAPI(H5Z_calc_parms_compound, FAIL)
/* Store compound datatype class code */
++cd_values_actual_nparms;
@@ -307,11 +306,11 @@ static herr_t H5Z_calc_parms_Tcompound(hid_t type_id)
/* Calculate parameters according to member's datatype class */
switch(dtype_member_class) {
case H5T_INTEGER:
- case H5T_FLOAT: H5Z_calc_parms_Tatomic();
+ case H5T_FLOAT: H5Z_calc_parms_atomic();
break;
- case H5T_ARRAY: H5Z_calc_parms_Tarray(dtype_member);
+ case H5T_ARRAY: H5Z_calc_parms_array(dtype_member);
break;
- case H5T_COMPOUND:H5Z_calc_parms_Tcompound(dtype_member);
+ case H5T_COMPOUND:H5Z_calc_parms_compound(dtype_member);
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype class not supported by nbit")
@@ -319,11 +318,11 @@ static herr_t H5Z_calc_parms_Tcompound(hid_t type_id)
} /* end for */
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Z_calc_params_Tcompound */
+} /* end H5Z_calc_params_compound */
/*-------------------------------------------------------------------------
- * Function: H5Z_set_parms_Tatomic
+ * Function: H5Z_set_parms_atomic
*
* Purpose: Set the cd_values[] for given a certain datatype identifier
* type_id if its datatype class is integer or floating point
@@ -338,7 +337,7 @@ done:
*
*-------------------------------------------------------------------------
*/
-static herr_t H5Z_set_parms_Tatomic(hid_t type_id, unsigned cd_values[])
+static herr_t H5Z_set_parms_atomic(hid_t type_id, unsigned cd_values[])
{
H5T_order_t dtype_order; /* Atomic datatype's endianness order */
size_t dtype_size; /* Atomic datatype's size (in bytes) */
@@ -346,7 +345,7 @@ static herr_t H5Z_set_parms_Tatomic(hid_t type_id, unsigned cd_values[])
int dtype_offset; /* Atomic datatype's offset (in bits) */
herr_t ret_value=SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI(H5Z_set_parms_Tatomic, FAIL)
+ FUNC_ENTER_NOAPI(H5Z_set_parms_atomic, FAIL)
/* Set datatype class code */
cd_values[cd_values_index++] = H5Z_NBIT_ATOMIC;
@@ -378,13 +377,18 @@ static herr_t H5Z_set_parms_Tatomic(hid_t type_id, unsigned cd_values[])
if((dtype_precision=H5Tget_precision(type_id))==0)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype precision")
- /* Set "local" parameter for datatype precision */
- cd_values[cd_values_index++] = dtype_precision;
-
/* Get datatype's offset */
if((dtype_offset=H5Tget_offset(type_id))<0)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype offset")
+ /* Check values of precision and offset */
+ if(dtype_precision>dtype_size*8 || (dtype_precision+dtype_offset)>dtype_size*8
+ || dtype_precision<=0 || dtype_offset<0)
+ HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "invalid datatype precision/offset")
+
+ /* Set "local" parameter for datatype precision */
+ cd_values[cd_values_index++] = dtype_precision;
+
/* Set "local" parameter for datatype offset */
cd_values[cd_values_index++] = dtype_offset;
@@ -394,11 +398,11 @@ static herr_t H5Z_set_parms_Tatomic(hid_t type_id, unsigned cd_values[])
compress_ratio_is_zero = FALSE;
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Z_set_parms_Tatomic() */
+} /* end H5Z_set_parms_atomic() */
/*-------------------------------------------------------------------------
- * Function: H5Z_set_parms_Tarray
+ * Function: H5Z_set_parms_array
*
* Purpose: Set the cd_values[] for given a certain datatype identifier
* type_id if its datatype class is array datatype
@@ -413,14 +417,14 @@ done:
*
*-------------------------------------------------------------------------
*/
-static herr_t H5Z_set_parms_Tarray(hid_t type_id, unsigned cd_values[])
+static herr_t H5Z_set_parms_array(hid_t type_id, unsigned cd_values[])
{
hid_t dtype_base; /* Array datatype's base datatype */
H5T_class_t dtype_base_class; /* Array datatype's base datatype's class */
size_t dtype_size; /* Array datatype's size (in bytes) */
herr_t ret_value=SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI(H5Z_set_parms_Tarray, FAIL)
+ FUNC_ENTER_NOAPI(H5Z_set_parms_array, FAIL)
/* Set datatype class code */
cd_values[cd_values_index++] = H5Z_NBIT_ARRAY;
@@ -443,22 +447,22 @@ static herr_t H5Z_set_parms_Tarray(hid_t type_id, unsigned cd_values[])
/* Call appropriate function according to base datatype's class */
switch(dtype_base_class) {
case H5T_INTEGER:
- case H5T_FLOAT: H5Z_set_parms_Tatomic(dtype_base, cd_values);
+ case H5T_FLOAT: H5Z_set_parms_atomic(dtype_base, cd_values);
break;
- case H5T_ARRAY: H5Z_set_parms_Tarray(dtype_base, cd_values);
+ case H5T_ARRAY: H5Z_set_parms_array(dtype_base, cd_values);
break;
- case H5T_COMPOUND:H5Z_set_parms_Tcompound(dtype_base, cd_values);
+ case H5T_COMPOUND:H5Z_set_parms_compound(dtype_base, cd_values);
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype class not supported by nbit")
} /* end switch */
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Z_set_parms_Tarray() */
+} /* end H5Z_set_parms_array() */
/*-------------------------------------------------------------------------
- * Function: H5Z_set_parms_Tcompound
+ * Function: H5Z_set_parms_compound
*
* Purpose: Set the cd_values[] for given a certain datatype identifier
* type_id if its datatype class is compound datatype
@@ -473,7 +477,7 @@ done:
*
*-------------------------------------------------------------------------
*/
-static herr_t H5Z_set_parms_Tcompound(hid_t type_id, unsigned cd_values[])
+static herr_t H5Z_set_parms_compound(hid_t type_id, unsigned cd_values[])
{
int i; /* local index variable */
int nmembers; /* Compound datatype's number of members */
@@ -483,7 +487,7 @@ static herr_t H5Z_set_parms_Tcompound(hid_t type_id, unsigned cd_values[])
size_t dtype_size; /* Compound datatype's size (in bytes) */
herr_t ret_value=SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI(H5Z_set_parms_Tcompound, FAIL)
+ FUNC_ENTER_NOAPI(H5Z_set_parms_compound, FAIL)
/* Set "local" parameter for compound datatype class code */
cd_values[cd_values_index++] = H5Z_NBIT_COMPOUND;
@@ -521,11 +525,11 @@ static herr_t H5Z_set_parms_Tcompound(hid_t type_id, unsigned cd_values[])
/* Call appropriate function according to member's datatype class */
switch(dtype_member_class) {
case H5T_INTEGER:
- case H5T_FLOAT: H5Z_set_parms_Tatomic(dtype_member, cd_values);
+ case H5T_FLOAT: H5Z_set_parms_atomic(dtype_member, cd_values);
break;
- case H5T_ARRAY: H5Z_set_parms_Tarray(dtype_member, cd_values);
+ case H5T_ARRAY: H5Z_set_parms_array(dtype_member, cd_values);
break;
- case H5T_COMPOUND:H5Z_set_parms_Tcompound(dtype_member, cd_values);
+ case H5T_COMPOUND:H5Z_set_parms_compound(dtype_member, cd_values);
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype class not supported by nbit")
@@ -533,7 +537,7 @@ static herr_t H5Z_set_parms_Tcompound(hid_t type_id, unsigned cd_values[])
} /* end for */
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Z_set_params_Tcompound */
+} /* end H5Z_set_params_compound */
/*-------------------------------------------------------------------------
@@ -545,7 +549,7 @@ done:
* Failure: Negative
*
* Programmer: Xiaowen Wu
- * Tuesday, January 11, 2004
+ * Tuesday, January 11, 2005
*
* Modifications:
*
@@ -567,15 +571,20 @@ H5Z_set_local_nbit(hid_t dcpl_id, hid_t type_id, hid_t space_id)
if((dtype_class = H5Tget_class(type_id)) == H5T_NO_CLASS )
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype class")
- /* Calculate how many parameters will fill the cd_values array */
- cd_values_actual_nparms = 1; /* first parameter reserved for dataset's number of elements */
+ /* Calculate how many parameters will fill the cd_values array
+ * First three parameters reserved for:
+ * 1. number of valid entries in array cd_values
+ * 2. flag if TRUE indicating no need to do nbit filter
+ * 3. number of elements in the chunk
+ */
+ cd_values_actual_nparms = 3;
switch(dtype_class) {
case H5T_INTEGER:
- case H5T_FLOAT: H5Z_calc_parms_Tatomic();
+ case H5T_FLOAT: H5Z_calc_parms_atomic();
break;
- case H5T_ARRAY: H5Z_calc_parms_Tarray(type_id);
+ case H5T_ARRAY: H5Z_calc_parms_array(type_id);
break;
- case H5T_COMPOUND:H5Z_calc_parms_Tcompound(type_id);
+ case H5T_COMPOUND:H5Z_calc_parms_compound(type_id);
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype class not supported by nbit")
@@ -585,7 +594,7 @@ H5Z_set_local_nbit(hid_t dcpl_id, hid_t type_id, hid_t space_id)
if(cd_values_actual_nparms > H5Z_NBIT_MAX_NPARMS)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype needs too many nbit parameters")
- /* allocate memory space for decompressed buffer */
+ /* Allocate memory space for cd_values[] */
if(NULL==(cd_values = H5MM_malloc(cd_values_actual_nparms*sizeof(unsigned))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed for cd_values[]")
@@ -601,23 +610,23 @@ H5Z_set_local_nbit(hid_t dcpl_id, hid_t type_id, hid_t space_id)
if ((npoints=H5Sget_simple_extent_npoints(space_id))<0)
HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get number of points in the dataspace")
- /* Initialize index for cd_values array */
- cd_values_index = 0;
-
- /* Set "local" parameter for this dataset's number of elements */
- cd_values[cd_values_index++] = npoints;
+ /* Initialize index for cd_values array starting from the third entry */
+ cd_values_index = 2;
+ /* Set "local" parameter for number of elements in the chunk */
+ H5_ASSIGN_OVERFLOW(cd_values[cd_values_index++],npoints,hssize_t,unsigned);
+
/* Assume compression ratio is zero now, will be changed to FALSE later if not */
compress_ratio_is_zero = TRUE;
/* Call appropriate function according to the datatype class */
switch(dtype_class) {
case H5T_INTEGER:
- case H5T_FLOAT: H5Z_set_parms_Tatomic(type_id, cd_values);
+ case H5T_FLOAT: H5Z_set_parms_atomic(type_id, cd_values);
break;
- case H5T_ARRAY: H5Z_set_parms_Tarray(type_id, cd_values);
+ case H5T_ARRAY: H5Z_set_parms_array(type_id, cd_values);
break;
- case H5T_COMPOUND:H5Z_set_parms_Tcompound(type_id, cd_values);
+ case H5T_COMPOUND:H5Z_set_parms_compound(type_id, cd_values);
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "datatype class not supported by nbit")
@@ -625,7 +634,11 @@ H5Z_set_local_nbit(hid_t dcpl_id, hid_t type_id, hid_t space_id)
/* Check if calculation of parameters matches with setting of parameters */
assert(cd_values_actual_nparms==cd_values_index);
-
+
+ /* Finally set the first two entries of cd_values[] */
+ cd_values[0] = cd_values_actual_nparms;
+ cd_values[1] = compress_ratio_is_zero;
+
/* Modify the filter's parameters for this dataset */
if(H5Pmodify_filter(dcpl_id, H5Z_FILTER_NBIT, flags, cd_values_actual_nparms, cd_values)<0)
HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local nbit parameters")
@@ -645,7 +658,7 @@ done:
* Failure: 0
*
* Programmer: Xiaowen Wu
- * Tuesday, December 21, 2004
+ * Friday, January 21, 2005
*
* Modifications:
*
@@ -657,28 +670,31 @@ H5Z_filter_nbit (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
{
size_t ret_value = 0; /* return value */
size_t size_out = 0; /* size of output buffer */
- hsize_t d_nelmts = 0; /* number of data elements in the chunk */
+ unsigned d_nelmts = 0; /* number of elements in the chunk */
unsigned char *outbuf = NULL; /* pointer to new output buffer */
- /*size_t i;*/
-
+
FUNC_ENTER_NOAPI(H5Z_filter_nbit, 0)
- /* check arguments */
- if (cd_nelmts!=cd_values_actual_nparms)
+ /* check arguments
+ * cd_values[0] stores actual number of parameters in cd_values[]
+ */
+ if (cd_nelmts!=cd_values[0])
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid nbit aggression level")
- /* no need to do nbit compress or decompress */
- if (compress_ratio_is_zero) {
+ /* check if need to do nbit compress or decompress
+ * cd_values[1] stores the flag if true indicating compression ratio is 0
+ */
+ if (cd_values[1]) {
ret_value = *buf_size;
goto done;
}
/* copy a filter parameter to d_nelmts */
- d_nelmts = cd_values[0];
+ d_nelmts = cd_values[2];
/* input; decompress */
if (flags & H5Z_FLAG_REVERSE) {
- size_out = d_nelmts * cd_values[2];
+ size_out = d_nelmts * cd_values[4]; /* cd_values[4] stores datatype size */
/* allocate memory space for decompressed buffer */
if(NULL==(outbuf = H5MM_malloc(size_out)))
@@ -689,14 +705,13 @@ H5Z_filter_nbit (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
}
/* output; compress */
else {
- /* difficult to calculate exact buffer size after compression */
- size_out = d_nelmts * cd_values[2];
+ size_out = nbytes;
/* allocate memory space for compressed buffer */
if(NULL==(outbuf = H5MM_malloc(size_out)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed for nbit compression")
- /* compress the buffer */
+ /* compress the buffer, size_out will be changed */
H5Z_nbit_compress(*buf, d_nelmts, outbuf, &size_out, cd_values);
}
@@ -779,7 +794,7 @@ void H5Z_nbit_decompress_one_atomic(void *data, size_t data_offset, unsigned cha
end_i: the index of byte having last significant bit */
int k, begin_i, end_i, datatype_len;
- datatype_len = p.sizeof_datatype * 8;
+ datatype_len = p.size * 8;
if(p.order == H5Z_NBIT_ORDER_LE) { /* little endian */
/* calculate begin_i and end_i */
@@ -819,13 +834,13 @@ void H5Z_nbit_decompress_one_array(void *data, size_t data_offset, unsigned char
switch(base_class) {
case H5Z_NBIT_ATOMIC:
- p.sizeof_datatype = parms[parms_index++];
+ p.size = parms[parms_index++];
p.order = parms[parms_index++];
p.precision = parms[parms_index++];
p.offset = parms[parms_index++];
- n = size/p.sizeof_datatype;
+ n = size/p.size;
for(i = 0; i < n; i++)
- H5Z_nbit_decompress_one_atomic(data, data_offset + i*p.sizeof_datatype,
+ H5Z_nbit_decompress_one_atomic(data, data_offset + i*p.size,
buffer, j, buf_len, p);
break;
case H5Z_NBIT_ARRAY:
@@ -865,7 +880,7 @@ void H5Z_nbit_decompress_one_compound(void *data, size_t data_offset, unsigned c
member_class = parms[parms_index++];
switch(member_class) {
case H5Z_NBIT_ATOMIC:
- p.sizeof_datatype = parms[parms_index++];
+ p.size = parms[parms_index++];
p.order = parms[parms_index++];
p.precision = parms[parms_index++];
p.offset = parms[parms_index++];
@@ -884,7 +899,8 @@ void H5Z_nbit_decompress_one_compound(void *data, size_t data_offset, unsigned c
}
}
-void H5Z_nbit_decompress(void *data, hsize_t d_nelmts, unsigned char *buffer, const unsigned parms[])
+void H5Z_nbit_decompress(void *data, unsigned d_nelmts, unsigned char *buffer,
+ const unsigned parms[])
{
/* i: index of data, j: index of buffer,
buf_len: number of bits to be filled in current byte */
@@ -893,38 +909,38 @@ void H5Z_nbit_decompress(void *data, hsize_t d_nelmts, unsigned char *buffer, co
parms_atomic p;
/* may not have to initialize to zeros */
- for(i = 0; i < d_nelmts*parms[2]; i++)
+ for(i = 0; i < d_nelmts*parms[4]; i++)
((unsigned char *)data)[i] = 0;
/* initialization before the loop */
j = 0;
buf_len = sizeof(unsigned char) * 8;
- switch(parms[1]) {
+ switch(parms[3]) {
case H5Z_NBIT_ATOMIC:
/* set the index before goto function call */
- p.sizeof_datatype = parms[2];
- p.order = parms[3];
- p.precision = parms[4];
- p.offset = parms[5];
+ p.size = parms[4];
+ p.order = parms[5];
+ p.precision = parms[6];
+ p.offset = parms[7];
for(i = 0; i < d_nelmts; i++) {
- H5Z_nbit_decompress_one_atomic(data, i*p.sizeof_datatype, buffer, &j, &buf_len, p);
+ H5Z_nbit_decompress_one_atomic(data, i*p.size, buffer, &j, &buf_len, p);
}
break;
case H5Z_NBIT_ARRAY:
- size = parms[2];
- parms_index = 2;
+ size = parms[4];
+ parms_index = 4;
for(i = 0; i < d_nelmts; i++) {
H5Z_nbit_decompress_one_array(data, i*size, buffer, &j, &buf_len, parms);
- parms_index = 2;
+ parms_index = 4;
}
break;
case H5Z_NBIT_COMPOUND:
- size = parms[2];
- parms_index = 2;
+ size = parms[4];
+ parms_index = 4;
for(i = 0; i < d_nelmts; i++) {
H5Z_nbit_decompress_one_compound(data, i*size, buffer, &j, &buf_len, parms);
- parms_index = 2;
+ parms_index = 4;
}
break;
} /* end switch */
@@ -973,7 +989,7 @@ void H5Z_nbit_compress_one_atomic(void *data, size_t data_offset, unsigned char
end_i: the index of byte having last significant bit */
int k, begin_i, end_i, datatype_len;
- datatype_len = p.sizeof_datatype * 8;
+ datatype_len = p.size * 8;
if(p.order == H5Z_NBIT_ORDER_LE) { /* little endian */
/* calculate begin_i and end_i */
@@ -1013,13 +1029,13 @@ void H5Z_nbit_compress_one_array(void *data, size_t data_offset, unsigned char *
switch(base_class) {
case H5Z_NBIT_ATOMIC:
- p.sizeof_datatype = parms[parms_index++];
+ p.size = parms[parms_index++];
p.order = parms[parms_index++];
p.precision = parms[parms_index++];
p.offset = parms[parms_index++];
- n = size/p.sizeof_datatype;
+ n = size/p.size;
for(i = 0; i < n; i++)
- H5Z_nbit_compress_one_atomic(data, data_offset + i*p.sizeof_datatype,
+ H5Z_nbit_compress_one_atomic(data, data_offset + i*p.size,
buffer, j, buf_len, p);
break;
case H5Z_NBIT_ARRAY:
@@ -1060,7 +1076,7 @@ void H5Z_nbit_compress_one_compound(void *data, size_t data_offset, unsigned cha
switch(member_class) {
case H5Z_NBIT_ATOMIC:
- p.sizeof_datatype = parms[parms_index++];
+ p.size = parms[parms_index++];
p.order = parms[parms_index++];
p.precision = parms[parms_index++];
p.offset = parms[parms_index++];
@@ -1079,7 +1095,7 @@ void H5Z_nbit_compress_one_compound(void *data, size_t data_offset, unsigned cha
}
}
-void H5Z_nbit_compress(void *data, hsize_t d_nelmts, unsigned char *buffer, size_t *buffer_size,
+void H5Z_nbit_compress(void *data, unsigned d_nelmts, unsigned char *buffer, size_t *buffer_size,
const unsigned parms[])
{
/* i: index of data, j: index of buffer,
@@ -1096,32 +1112,32 @@ void H5Z_nbit_compress(void *data, hsize_t d_nelmts, unsigned char *buffer, size
j = 0;
buf_len = sizeof(unsigned char) * 8;
- switch(parms[1]) {
+ switch(parms[3]) {
case H5Z_NBIT_ATOMIC:
/* set the index before goto function call */
- p.sizeof_datatype = parms[2];
- p.order = parms[3];
- p.precision = parms[4];
- p.offset = parms[5];
+ p.size = parms[4];
+ p.order = parms[5];
+ p.precision = parms[6];
+ p.offset = parms[7];
for(i = 0; i < d_nelmts; i++) {
- H5Z_nbit_compress_one_atomic(data, i*p.sizeof_datatype, buffer, &j, &buf_len, p);
+ H5Z_nbit_compress_one_atomic(data, i*p.size, buffer, &j, &buf_len, p);
}
break;
case H5Z_NBIT_ARRAY:
- size = parms[2];
- parms_index = 2;
+ size = parms[4];
+ parms_index = 4;
for(i = 0; i < d_nelmts; i++) {
H5Z_nbit_compress_one_array(data, i*size, buffer, &j, &buf_len, parms);
- parms_index = 2;
+ parms_index = 4;
}
break;
case H5Z_NBIT_COMPOUND:
- size = parms[2];
- parms_index = 2;
+ size = parms[4];
+ parms_index = 4;
for(i = 0; i < d_nelmts; i++) {
H5Z_nbit_compress_one_compound(data, i*size, buffer, &j, &buf_len, parms);
- parms_index = 2;
+ parms_index = 4;
}
break;
} /* end switch */