165 lines
4.6 KiB
C
165 lines
4.6 KiB
C
/* $NetBSD: printf.c,v 1.12 1997/06/26 19:11:48 drochner Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)printf.c 8.1 (Berkeley) 6/11/93
|
|
*/
|
|
|
|
// This version uses almost no stack, and does not suffer from buffer
|
|
// overflows. The downside is that it does not implement a wide range
|
|
// of formatting characters.
|
|
|
|
#include <c_stdlib.h>
|
|
#include <c_types.h>
|
|
#include <c_stdarg.h>
|
|
#include "driver/uart.h"
|
|
|
|
static void kprintn (void (*)(const char), uint32_t, int, int, char);
|
|
static void kdoprnt (void (*)(const char), const char *, va_list);
|
|
|
|
void
|
|
dbg_printf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
kdoprnt(uart0_putc, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
dbg_vprintf(const char *fmt, va_list ap)
|
|
{
|
|
kdoprnt(uart0_putc, fmt, ap);
|
|
}
|
|
|
|
void
|
|
kdoprnt(void (*put)(const char), const char *fmt, va_list ap)
|
|
{
|
|
register char *p;
|
|
register int ch, n;
|
|
unsigned long ul;
|
|
int lflag, set;
|
|
char zwidth;
|
|
char width;
|
|
|
|
for (;;) {
|
|
while ((ch = *fmt++) != '%') {
|
|
if (ch == '\0')
|
|
return;
|
|
put(ch);
|
|
}
|
|
lflag = 0;
|
|
width = 0;
|
|
zwidth = ' ';
|
|
reswitch: switch (ch = *fmt++) {
|
|
case '\0':
|
|
/* XXX print the last format character? */
|
|
return;
|
|
case 'l':
|
|
lflag = 1;
|
|
goto reswitch;
|
|
case 'c':
|
|
ch = va_arg(ap, int);
|
|
put(ch & 0x7f);
|
|
break;
|
|
case 's':
|
|
p = va_arg(ap, char *);
|
|
if (p == 0) {
|
|
p = "<null>";
|
|
}
|
|
while ((ch = *p++))
|
|
put(ch);
|
|
break;
|
|
case 'd':
|
|
ul = lflag ?
|
|
va_arg(ap, long) : va_arg(ap, int);
|
|
if ((long)ul < 0) {
|
|
put('-');
|
|
ul = -(long)ul;
|
|
}
|
|
kprintn(put, ul, 10, width, zwidth);
|
|
break;
|
|
case 'o':
|
|
ul = lflag ?
|
|
va_arg(ap, uint32_t) : va_arg(ap, uint32_t);
|
|
kprintn(put, ul, 8, width, zwidth);
|
|
break;
|
|
case 'u':
|
|
ul = lflag ?
|
|
va_arg(ap, uint32_t) : va_arg(ap, uint32_t);
|
|
kprintn(put, ul, 10, width, zwidth);
|
|
break;
|
|
case 'x':
|
|
ul = lflag ?
|
|
va_arg(ap, uint32_t) : va_arg(ap, uint32_t);
|
|
kprintn(put, ul, 16, width, zwidth);
|
|
break;
|
|
default:
|
|
if (ch >= '0' && ch <= '9') {
|
|
if (ch == '0' && width == 0 && zwidth == ' ') {
|
|
zwidth = '0';
|
|
} else {
|
|
width = width * 10 + ch - '0';
|
|
}
|
|
goto reswitch;
|
|
}
|
|
put('%');
|
|
if (lflag)
|
|
put('l');
|
|
put(ch);
|
|
}
|
|
}
|
|
va_end(ap);
|
|
}
|
|
|
|
static void
|
|
kprintn(void (*put)(const char), unsigned long ul, int base, int width, char padchar)
|
|
{
|
|
/* hold a long in base 8 */
|
|
char *p, buf[(sizeof(long) * 8 / 3) + 2];
|
|
|
|
p = buf;
|
|
do {
|
|
*p++ = "0123456789abcdef"[ul % base];
|
|
} while (ul /= base);
|
|
|
|
while (p - buf < width--) {
|
|
put(padchar);
|
|
}
|
|
|
|
do {
|
|
put(*--p);
|
|
} while (p > buf);
|
|
}
|