>-----Original Message-----
>From: PerL
>Sent: 15 February 2005 13:06
>To: Microcontroller discussion list - Public.
>Subject: Re: [PIC] Bug in Microchip mcc18 std library?
>
>
>Is there a reason you can't use:
>
> void putrsUSART(const rom char *data)
>{
>  do
>   {  // Transmit a byte
>     while(BusyUSART());
>     putcUSART(*data);
>   } while( *++data );      // <<<<<<<<
> }
>
>?
>
>PerL

Consider what would happen if the pointer were pointing to a NULL
string.  The NULL would be sent, and then the next character (some
random memory address) would be checked.  This is a very dangerous
function, it could potentially send out huge amounts of garbage data.

IMO the value should always be checked BEFORE sending it, not after.

Regards

Mike

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