_printf_string.c

从iccavr7中破解得到的lib库源代码

/* #include'd in _printf.c twice for AVR
 *  SPTR    - pointer to the string to print
 *  STRLEN  - strlen or cstrlen
 */
#if !defined(MINIMAL_PRINTF)
          if (prec == -1)
            prec = 0;
          /* width is the total length of the output desired
           * prec is the length of the string.
           * First make width the length of the padding
           */
          if (width)
              width -= STRLEN(SPTR);
          if (prec == 0)
            prec = STRLEN(SPTR);
          if (width && (flags & F_ADDSIGN))
            width--;
          /* zero padded, 
           * put sign character, then 0s
           */
          if (flags & F_ZEROPADD)
            {
              if (flags & F_ADDSIGN)
                  PUT1CHAR(signch);
              if (!(flags & F_LEFTALIGN))
                  while (width > 0)
                    {
                    PUT1CHAR('0');
                    width--;
                    }
            }
          /* space padded
           * pad, then add sign character
           */
          else
            {
              if (!(flags & F_LEFTALIGN))
                  while (width > 0)
                    {
                    PUT1CHAR(' ');
                    width--;
                    }
              if (flags & F_ADDSIGN)
                  PUT1CHAR(signch);
             }
          /* now put the actual string */
          while (*SPTR && prec--)
#else
          if (signch == '-')
            PUT1CHAR('-');
          while (*SPTR)
#endif
              {
              PUT1CHAR(*SPTR);
              SPTR++;
              }
#if !defined(MINIMAL_PRINTF)
          /* then pad if necessary */
          if (flags & F_LEFTALIGN)
            {
              while (width > 0)
                {
                  PUT1CHAR(' ');
                  width--;
                }
            }
#endif