gptr _myrealloc (register gptr pPtr, register uint uSize,
const char *sFile, uint uLine, myf MyFlags)
{
struct remember *pRec;
gptr ptr;
DBUG_ENTER("_myrealloc");
if (!pPtr && (MyFlags & MY_ALLOW_ZERO_PTR))
DBUG_RETURN(_mymalloc(uSize,sFile,uLine,MyFlags));
if (!sf_malloc_quick)
(void) _sanity (sFile, uLine);
if (check_ptr("Reallocating",(byte*) pPtr,sFile,uLine))
DBUG_RETURN((gptr) NULL);
pRec = (struct remember *) ((char*) pPtr - sizeof (struct irem)-
sf_malloc_prehunc);
if (*((long*) ((char*) &pRec -> lSpecialValue+sf_malloc_prehunc))
!= MAGICKEY)
{
fprintf (stderr, "Reallocating unallocated data at line %d, '%s'\n",
uLine, sFile);
DBUG_PRINT("safe",("Reallocating unallocated data at line %d, '%s'",
uLine, sFile));
(void) fflush(stderr);
DBUG_RETURN((gptr) NULL);
}
if ((ptr=_mymalloc(uSize,sFile,uLine,MyFlags))) /* Allocate new area */
{
uSize=min(uSize,pRec-> uDataSize); /* Move as much as possibly */
memcpy((byte*) ptr,pPtr,(size_t) uSize); /* Copy old data */
_myfree(pPtr,sFile,uLine,0); /* Free not needed area */
}
else
{
if (MyFlags & MY_HOLD_ON_ERROR)
DBUG_RETURN(pPtr);
if (MyFlags & MY_FREE_ON_ERROR)
_myfree(pPtr,sFile,uLine,0);
}
DBUG_RETURN(ptr);
} /* _myrealloc */
void *_myrealloc(register void *ptr, register size_t size,
const char *filename, uint lineno, myf MyFlags)
{
struct st_irem *irem;
char *data;
DBUG_ENTER("_myrealloc");
if (!ptr && (MyFlags & MY_ALLOW_ZERO_PTR))
DBUG_RETURN(_mymalloc(size, filename, lineno, MyFlags));
if (!sf_malloc_quick)
(void) _sanity (filename, lineno);
if (check_ptr("Reallocating", (uchar*) ptr, filename, lineno))
DBUG_RETURN((uchar*) NULL);
irem= (struct st_irem *) (((char*) ptr) - ALIGN_SIZE(sizeof(struct st_irem))-
sf_malloc_prehunc);
if (*((uint32*) (((char*) ptr)- sizeof(uint32))) != MAGICKEY)
{
fprintf(stderr, "Error: Reallocating unallocated data at line %d, '%s'\n",
lineno, filename);
DBUG_PRINT("safe",("Reallocating unallocated data at line %d, '%s'",
lineno, filename));
(void) fflush(stderr);
DBUG_RETURN((uchar*) NULL);
}
if ((data= _mymalloc(size,filename,lineno,MyFlags))) /* Allocate new area */
{
size=min(size, irem->datasize); /* Move as much as possibly */
memcpy((uchar*) data, ptr, (size_t) size); /* Copy old data */
_myfree(ptr, filename, lineno, 0); /* Free not needed area */
}
else
{
if (MyFlags & MY_HOLD_ON_ERROR)
DBUG_RETURN(ptr);
if (MyFlags & MY_FREE_ON_ERROR)
_myfree(ptr, filename, lineno, 0);
}
DBUG_RETURN(data);
} /* _myrealloc */
void
myfree_f(void *ptr)
{
/* this one is used for function pointers, when you need &myfree */
_myfree(ptr, "FUNCTION_PTR", 0);
}
