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-rw-r--r--src/H5Toffset.c166
1 files changed, 87 insertions, 79 deletions
diff --git a/src/H5Toffset.c b/src/H5Toffset.c
index 2b15aaf..bea8d2b 100644
--- a/src/H5Toffset.c
+++ b/src/H5Toffset.c
@@ -18,16 +18,16 @@
* the datatype offset for the H5T interface.
*/
-#define H5T_PACKAGE /* suppress error about including H5Tpkg */
+#define H5T_PACKAGE /*suppress error about including H5Tpkg */
/* Interface initialization */
-#define H5_INTERFACE_INIT_FUNC H5T_init_offset_interface
+#define H5_INTERFACE_INIT_FUNC H5T_init_offset_interface
-#include "H5private.h" /* Generic Functions */
-#include "H5Eprivate.h" /* Error handling */
-#include "H5Iprivate.h" /* IDs */
-#include "H5Tpkg.h" /* Datatypes */
+#include "H5private.h" /* Generic Functions */
+#include "H5Eprivate.h" /* Error handling */
+#include "H5Iprivate.h" /* IDs */
+#include "H5Tpkg.h" /* Datatypes */
/* Static local functions */
static herr_t H5T_set_offset(const H5T_t *dt, size_t offset);
@@ -157,64 +157,68 @@ done:
/*-------------------------------------------------------------------------
- * Function: H5Tset_offset
+ * Function: H5Tset_offset
*
- * Purpose: Sets the bit offset of the first significant bit. The
- * signficant bits of an atomic datum can be offset from the
- * beginning of the memory for that datum by an amount of
- * padding. The `offset' property specifies the number of bits
- * of padding that appear to the "right of" the value. That is,
- * if we have a 32-bit datum with 16-bits of precision having
- * the value 0x1122 then it will be layed out in memory as (from
- * small byte address toward larger byte addresses):
+ * Purpose: Sets the bit offset of the first significant bit. The
+ * signficant bits of an atomic datum can be offset from the
+ * beginning of the memory for that datum by an amount of
+ * padding. The `offset' property specifies the number of bits
+ * of padding that appear to the "right of" the value. That is,
+ * if we have a 32-bit datum with 16-bits of precision having
+ * the value 0x1122 then it will be layed out in memory as (from
+ * small byte address toward larger byte addresses):
*
- * Big Big Little Little
- * Endian Endian Endian Endian
- * offset = 0 offset = 16 offset = 0 offset = 16
+ * Big Big Little Little
+ * Endian Endian Endian Endian
+ * offset=0 offset=16 offset=0 offset=16
*
- * 0: [ pad] [0x11] [0x22] [ pad]
- * 1: [ pad] [0x22] [0x11] [ pad]
- * 2: [0x11] [ pad] [ pad] [0x22]
- * 3: [0x22] [ pad] [ pad] [0x11]
+ * 0: [ pad] [0x11] [0x22] [ pad]
+ * 1: [ pad] [0x22] [0x11] [ pad]
+ * 2: [0x11] [ pad] [ pad] [0x22]
+ * 3: [0x22] [ pad] [ pad] [0x11]
*
- * If the offset is incremented then the total size is
- * incremented also if necessary to prevent significant bits of
- * the value from hanging over the edge of the data type.
+ * If the offset is incremented then the total size is
+ * incremented also if necessary to prevent significant bits of
+ * the value from hanging over the edge of the data type.
*
- * The offset of an H5T_STRING cannot be set to anything but
- * zero.
+ * The offset of an H5T_STRING cannot be set to anything but
+ * zero.
*
- * Return: SUCCEED/FAIL
+ * Return: Non-negative on success/Negative on failure
*
- * Programmer: Robb Matzke
- * Wednesday, January 7, 1998
+ * Programmer: Robb Matzke
+ * Wednesday, January 7, 1998
+ *
+ * Modifications:
+ * Robb Matzke, 22 Dec 1998
+ * Moved real work to a private function.
*
*-------------------------------------------------------------------------
*/
herr_t
H5Tset_offset(hid_t type_id, size_t offset)
{
- H5T_t *dt;
- herr_t ret_value = SUCCEED; /* Return value */
+ H5T_t *dt;
+ herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iz", type_id, offset);
/* Check args */
- if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE)))
- HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an atomic data type")
- if(H5T_STATE_TRANSIENT != dt->shared->state)
- HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "data type is read-only")
- if(H5T_STRING == dt->shared->type && offset != 0)
- HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "offset must be zero for this type")
- if(H5T_ENUM == dt->shared->type && dt->shared->u.enumer.nmembs > 0)
- HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined")
- if(H5T_COMPOUND == dt->shared->type || H5T_REFERENCE == dt->shared->type || H5T_OPAQUE == dt->shared->type)
- HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "operation not defined for this datatype")
+ if (NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE)))
+ HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an atomic data type")
+ if (H5T_STATE_TRANSIENT!=dt->shared->state)
+ HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "data type is read-only")
+ if (H5T_STRING == dt->shared->type && offset != 0)
+ HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "offset must be zero for this type")
+ if (H5T_ENUM==dt->shared->type && dt->shared->u.enumer.nmembs>0)
+ HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined")
+ if (H5T_COMPOUND==dt->shared->type || H5T_REFERENCE==dt->shared->type || H5T_OPAQUE==dt->shared->type)
+ HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "operation not defined for this datatype")
/* Do the real work */
- if (H5T_set_offset(dt, offset) < 0)
- HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set offset")
+ if (H5T_set_offset(dt, offset)<0)
+ HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set offset")
done:
FUNC_LEAVE_API(ret_value)
@@ -222,66 +226,70 @@ done:
/*-------------------------------------------------------------------------
- * Function: H5T_set_offset
+ * Function: H5T_set_offset
+ *
+ * Purpose: Sets the bit offset of the first significant bit. The
+ * signficant bits of an atomic datum can be offset from the
+ * beginning of the memory for that datum by an amount of
+ * padding. The `offset' property specifies the number of bits
+ * of padding that appear to the "right of" the value. That is,
+ * if we have a 32-bit datum with 16-bits of precision having
+ * the value 0x1122 then it will be layed out in memory as (from
+ * small byte address toward larger byte addresses):
*
- * Purpose: Sets the bit offset of the first significant bit. The
- * signficant bits of an atomic datum can be offset from the
- * beginning of the memory for that datum by an amount of
- * padding. The `offset' property specifies the number of bits
- * of padding that appear to the "right of" the value. That is,
- * if we have a 32-bit datum with 16-bits of precision having
- * the value 0x1122 then it will be layed out in memory as (from
- * small byte address toward larger byte addresses):
+ * Big Big Little Little
+ * Endian Endian Endian Endian
+ * offset=0 offset=16 offset=0 offset=16
*
- * Big Big Little Little
- * Endian Endian Endian Endian
- * offset = 0 offset = 16 offset = 0 offset = 16
+ * 0: [ pad] [0x11] [0x22] [ pad]
+ * 1: [ pad] [0x22] [0x11] [ pad]
+ * 2: [0x11] [ pad] [ pad] [0x22]
+ * 3: [0x22] [ pad] [ pad] [0x11]
*
- * 0: [ pad] [0x11] [0x22] [ pad]
- * 1: [ pad] [0x22] [0x11] [ pad]
- * 2: [0x11] [ pad] [ pad] [0x22]
- * 3: [0x22] [ pad] [ pad] [0x11]
+ * If the offset is incremented then the total size is
+ * incremented also if necessary to prevent significant bits of
+ * the value from hanging over the edge of the data type.
*
- * If the offset is incremented then the total size is
- * incremented also if necessary to prevent significant bits of
- * the value from hanging over the edge of the data type.
+ * The offset of an H5T_STRING cannot be set to anything but
+ * zero.
*
- * The offset of an H5T_STRING cannot be set to anything but
- * zero.
+ * Return: Non-negative on success/Negative on failure
*
- * Return: SUCCEED/FAIL
+ * Programmer: Robb Matzke
+ * Wednesday, January 7, 1998
*
- * Programmer: Robb Matzke
- * Wednesday, January 7, 1998
+ * Modifications:
+ * Robb Matzke, 22 Dec 1998
+ * Also works for derived data types.
*
*-------------------------------------------------------------------------
*/
static herr_t
H5T_set_offset(const H5T_t *dt, size_t offset)
{
- herr_t ret_value = SUCCEED; /* Return value */
+ herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(FAIL)
/* Check args */
assert(dt);
- assert(H5T_STRING != dt->shared->type || 0 == offset);
- assert(H5T_REFERENCE != dt->shared->type);
- assert(H5T_OPAQUE != dt->shared->type);
- assert(H5T_COMPOUND != dt->shared->type);
- assert(!(H5T_ENUM == dt->shared->type && 0 == dt->shared->u.enumer.nmembs));
+ assert(H5T_STRING!=dt->shared->type || 0==offset);
+ assert(H5T_REFERENCE!=dt->shared->type);
+ assert(H5T_OPAQUE!=dt->shared->type);
+ assert(H5T_COMPOUND!=dt->shared->type);
+ assert(!(H5T_ENUM==dt->shared->type && 0==dt->shared->u.enumer.nmembs));
if (dt->shared->parent) {
- if (H5T_set_offset(dt->shared->parent, offset) < 0)
- HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set offset for base type")
+ if (H5T_set_offset(dt->shared->parent, offset)<0)
+ HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set offset for base type")
/* Adjust size of datatype appropriately */
- if(dt->shared->type == H5T_ARRAY)
+ if(dt->shared->type==H5T_ARRAY)
dt->shared->size = dt->shared->parent->shared->size * dt->shared->u.array.nelem;
- else if(dt->shared->type != H5T_VLEN)
+ else if(dt->shared->type!=H5T_VLEN)
dt->shared->size = dt->shared->parent->shared->size;
} else {
- if (offset + dt->shared->u.atomic.prec > 8 * dt->shared->size)
+ if (offset+dt->shared->u.atomic.prec > 8*dt->shared->size)
dt->shared->size = (offset + dt->shared->u.atomic.prec + 7) / 8;
dt->shared->u.atomic.offset = offset;
}