Re: [9fans] rc for unix

[Boyd Roberts <boyd@strakt.com>]

"Thomas Bushnell, BSG" wrote:
> >       BUGS:
> >       There is an implicit assumption that commands are no
> >       more than 1k characters long.
>
> You'd think by 1991 poeple would have stopped making such
> assumptions...

Exactly.

The original code didn't care, until you ran out of memory:

#define FLEXZ       128

#define flex_char(f, c)  (*((f)->f_ptr == (f)->f_end ? flex_fill(f) :
(f)->f_ptr++) = (c))

typedef struct
{
     char *f_str;
     char *f_end;
     char *f_ptr;
}
          flex;

void
flex_init(f)
register flex  *f;
{
     f->f_str = f->f_ptr = salloc(FLEXZ);
     f->f_end = f->f_ptr + FLEXZ;
}

char *
flex_fill(f)
register flex  *f;
{
     register int   s;

     s = f->f_end - f->f_str + FLEXZ;

     f->f_str = srealloc(f->f_str, s);
     f->f_end = f->f_str + s;
     f->f_ptr = f->f_end - FLEXZ;

     return f->f_ptr++;
}

...

You get the picture.