184ed5f988
Massive update. The highlights: o dramatically cut memory usage by writing better, less intertwingled code. o implement booting off mmc/sd cards (sd only tested one at the moment) o start to split out board specific stuff for boot2.
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/*-
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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* Copyright (c) 2006 M. Warner Losh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*
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* $FreeBSD$
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*/
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#include <stdarg.h>
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#include "lib.h"
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void
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printf(const char *fmt,...)
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{
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va_list ap;
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const char *hex = "0123456789abcdef";
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char buf[10];
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char *s;
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unsigned u;
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int c;
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va_start(ap, fmt);
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while ((c = *fmt++)) {
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if (c == '%') {
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c = *fmt++;
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switch (c) {
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case 'c':
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xputchar(va_arg(ap, int));
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continue;
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case 's':
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for (s = va_arg(ap, char *); *s; s++)
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xputchar(*s);
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continue;
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case 'd': /* A lie, always prints unsigned */
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case 'u':
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u = va_arg(ap, unsigned);
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s = buf;
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do
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*s++ = '0' + u % 10U;
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while (u /= 10U);
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dumpbuf:;
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while (--s >= buf)
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xputchar(*s);
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continue;
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case 'x':
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u = va_arg(ap, unsigned);
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s = buf;
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do
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*s++ = hex[u & 0xfu];
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while (u >>= 4);
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goto dumpbuf;
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}
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}
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xputchar(c);
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}
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va_end(ap);
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return;
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}
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