>>>>> "Jan" == Jan Hudec <bulb@ucw.cz> writes:
Jan> On Tue, Jul 13, 2004 at 17:17:41 +0530, amith wrote:
>> hi all,
>>
>> main()
>> {
>> void **blkPtr;
>> char *Buffer;
>> char *ptr;
>> Buffer = (char *) malloc(10000);
>>
>> if( ((unsigned long)Buffer % 4) == 0)
>> printf(" Buffer = %u is divisible by 4 \n",Buffer);
>>
>> // Buffer++; /* if this line is commented ,the code works as
>> expected */
>> blkPtr = (void **)Buffer;
>>
>>
>> *blkPtr = ((void *)0x11223344);
>> ptr = Buffer;
>> printf(" value = %X address = %X\n",*ptr,ptr);
>> ptr++;
>> printf(" value = %X address = %X\n",*ptr,ptr);
>> ptr++;
>> printf(" value = %X address = %X\n",*ptr,ptr);
>> ptr++;
>> printf(" value = %X address = %X\n",*ptr,ptr);
>> }
>> [...]
>> could someone bail me out of this ?
Jan> I fear that the code is invalid. It violates the aliasing rules. The
Jan> compiler is allowed to expect, that a char * never ever points to the
Jan> same location as void **.
No.
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