/*===========================================================================
FUNCTION DSMBIT_BIT_COPY
DESCRIPTION
Copies bitwise from one item into another.
DEPENDENCIES
Only copies from one item into one item are supported.
PARAMETERS
src_ptr - DSM item to copy from
dst_ptr - DSM item to copy into
src_offset - Bit offset to start copying from
dst_offset - Bit offset to start copying into
len - Number of bits to copy
RETURN VALUE
Number of bits copied
SIDE_EFFECTS
===========================================================================*/
uint16 dsmbiti_bit_copy
(
dsm_item_type* src_ptr,
dsm_item_type* dst_ptr,
uint16 src_offset,
uint16 dst_offset,
uint16 len,
const char * file,
uint32 line
)
{
int i;
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* Sanity check on the item pointers */
if ( (src_ptr == NULL) || (dst_ptr == NULL) )
{
MSG(MSG_SSID_DFLT, MSG_LEGACY_ERROR,"NULL dsm item pointer");
return 0;
}
/* Sanity chack that we copy within the items */
if ( ((((src_offset + len) / 8) + 1) > src_ptr->used)
||
((((dst_offset + len) / 8) + 1) > DSMI_SIZE(dst_ptr) ) )
{
MSG_1(MSG_SSID_DFLT, MSG_LEGACY_ERROR,"Copy length %d exceeds item size", len);
return 0;
}
/* Copy each bit */
for ( i=0; i<len; i++ )
{
/* Null out destination bit */
*(dst_ptr->data_ptr + ((dst_offset + i) / 8)) &=
~dsmbit_bit_copy_mask[(dst_offset + i) % 8];
/* Or source bit into the very spot */
*(dst_ptr->data_ptr + ((dst_offset + i) / 8)) |=
((*(src_ptr->data_ptr + ((src_offset + i) / 8))
& dsmbit_bit_copy_mask[(src_offset + i) % 8])
>> (7 - ((src_offset + i) % 8)))
<< (7 - ((dst_offset + i) % 8));
}
/* Update the destination item's used field */
dst_ptr->used = ((dst_offset + len) / 8) + (((dst_offset + len) % 8) * 1);
#ifdef FEATURE_DSM_MEM_CHK
dsmi_touch_item(dst_ptr,file,line);
#endif
return len;
}
void
dsmi_set_meta
(
dsm_item_type * item_ptr,
void * meta_ptr,
uint32 size,
const char * file,
uint32 line
)
{
dsm_pool_mgmt_table_type *table;
ASSERT( item_ptr != NULL && meta_ptr != NULL );
ASSERT( DSM_POOL_ITEM_SIZE(item_ptr->pool_id) == 0 );
#ifdef FEATURE_DSM_MEM_CHK_EXPENSIVE_ALWAYS_VERIFY_PACKET
dsmi_verify_packet(item_ptr);
#endif /* FEATURE_DSM_MEM_CHK_EXPENSIVE_ALWAYS_VERIFY_PACKET */
#ifdef FEATURE_DSM_MEM_CHK
dsmi_verify_pool_id(item_ptr->pool_id);
#endif
#ifdef FEATURE_DSM_MEM_CHK_QUEUE_CACHE_LENGTH
ASSERT(item_ptr->enqueued_packet_length == 0);
#endif
table = (dsm_pool_mgmt_table_type *)item_ptr->pool_id;
ASSERT( table->pad_size >= size && size > 0 );
memcpy( (uint8*)(item_ptr) - size, meta_ptr, size );
#ifdef FEATURE_DSM_MEM_CHK
dsmi_touch_item(item_ptr, file, line);
#endif /* FEATURE_DSM_MEM_CHK */
} /* dsm_set_meta */
