Category : C Source Code
Archive   : HEAPMAN.ZIP
Filename : UPDATEBL.C

#include "mm.h"

UpdateBlk(aHndl, theSize)
long *aHndl;
int theSize;

/*
updates info in header of data block. Occurs whenever a new blk is
created or moved.

calling params:
hndl to data blk
size of blk, for nu blk | -1, for updating existing blk

return params:
err | noErr
Author: Byro
Creation: 01/10/91
Modified: 01/21/91
Revision:

*/

{
dataStruct *aBlkPtr = NIL;
unsigned long myTemp; /* used 2 avoid errs during computing adrses */

if (*aHndl == NIL)
return(!NO_ERR);

aBlkPtr = (dataStruct *) *aHndl;

if (theSize != MINUS_ONE) /* set size field if nu blk */
aBlkPtr->blkSize = theSize;

/* compute nu adrs */

myTemp = (unsigned long) aBlkPtr + HDR;
aBlkPtr->dataSpace = (long *) myTemp;

return(NO_ERR);
}