Re: [cc65] discarded if statement

On Mon, Aug 09, 2004 at 12:58:51PM +0200, Groepaz wrote:
> looks like a succesful attempt of earning some more grey hair to me :o)

Code like this can be useful. Assume a routine that converts a number into a
string. The usual problem with such a routine is that conversion starts at the
least significant digit, while we need to write the most significant digit as
the first digit to the buffer. There are several solutions for this problem.
A possible one uses the stack:

        void convert (unsigned val, char* buf)
        {
            char c;

            push ('\0');
            do {
                push ((val % 10) + '0');
                val = val / 10;
            } while (val != 0);

If the data is then poped from stack, it has the "right" order for the
converted number:

            do {
                c = *buf++ = pop ();
            } while (c  != '\0');
        }

Regards


        Uz


-- 
Ullrich von Bassewitz                                  uz@musoftware.de
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