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/*-
* Copyright (c) 1998 Robert Nordier
* All rights reserved.
* Copyright (c) 2006 M. Warner Losh
* All rights reserved.
*
* Redistribution and use in source and binary forms are freely
* permitted provided that the above copyright notice and this
* paragraph and the following disclaimer are duplicated in all
* such forms.
*
* This software is provided "AS IS" and without any express or
* implied warranties, including, without limitation, the implied
* warranties of merchantability and fitness for a particular
* purpose.
*
* $FreeBSD$
*/
#include <stdarg.h>
#include "lib.h"
void
printf(const char *fmt,...)
{
va_list ap;
const char *hex = "0123456789abcdef";
char buf[10];
char *s;
unsigned u;
int c;
va_start(ap, fmt);
while ((c = *fmt++)) {
if (c == '%') {
c = *fmt++;
switch (c) {
case 'c':
xputchar(va_arg(ap, int));
continue;
case 's':
for (s = va_arg(ap, char *); *s; s++)
xputchar(*s);
continue;
case 'd': /* A lie, always prints unsigned */
case 'u':
u = va_arg(ap, unsigned);
s = buf;
do
*s++ = '0' + u % 10U;
while (u /= 10U);
dumpbuf:;
while (--s >= buf)
xputchar(*s);
continue;
case 'x':
u = va_arg(ap, unsigned);
s = buf;
do
*s++ = hex[u & 0xfu];
while (u >>= 4);
goto dumpbuf;
}
}
xputchar(c);
}
va_end(ap);
return;
}
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