make widths == 0 illegal

[unix-history] / usr / src / usr.bin / pascal / libpc / MAX.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)MAX.c 1.3 %G%";

#include "h00vars.h"
#include "h01errs.h"

long
MAX(width, reduce, min)

       register long   width;          /* requested width */
       long            reduce;         /* amount of extra space required */
       long            min;            /* minimum amount of space needed */
{
       if (width <= 0) {
               ERROR(EFMTSIZE, width);
               return;
       }
       if ((width -= reduce) >= min)
               return width;
       return min;
}