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4e10901e691d0f68dbff54f99e4f85c1b76a4e79
xen/extras/mini-os/lib/printf.c
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/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*-
****************************************************************************
* (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
****************************************************************************
*
* File: printf.c
* Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
* Changes:
*
* Date: Aug 2003
*
* Environment: Xen Minimal OS
* Description: Library functions for printing
* (freebsd port, mainly sys/subr_prf.c)
*
****************************************************************************
* $Id: c-insert.c,v 1.7 2002/11/08 16:04:34 rn Exp $
****************************************************************************
*
*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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.
*
* $FreeBSD: src/sys/libkern/divdi3.c,v 1.6 1999/08/28 00:46:31 peter Exp $
*/
#include <os.h>
#include <types.h>
#include <hypervisor.h>
#include <lib.h>
/****************************************************************************
* RN: printf family of routines
* taken mainly from sys/subr_prf.c
****************************************************************************/
char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz";
#define hex2ascii(hex) (hex2ascii_data[hex])
#define NBBY 8 /* number of bits in a byte */
#define MAXNBUF (sizeof(quad_t) * NBBY + 1)
static int kvprintf(char const *fmt, void *arg, int radix, va_list ap);
int
printf(const char *fmt, ...)
{
va_list ap;
int retval;
static char printk_buf[1024];
va_start(ap, fmt);
retval = kvprintf(fmt, printk_buf, 10, ap);
printk_buf[retval] = '\0';
va_end(ap);
(void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(printk_buf),
printk_buf);
return retval;
}
int
vprintf(const char *fmt, va_list ap)
{
int retval;
static char printk_buf[1024];
retval = kvprintf(fmt, printk_buf, 10, ap);
printk_buf[retval] = '\0';
(void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(printk_buf),
printk_buf);
return retval;
}
int
sprintf(char *buf, const char *cfmt, ...)
{
int retval;
va_list ap;
va_start(ap, cfmt);
retval = kvprintf(cfmt, (void *)buf, 10, ap);
buf[retval] = '\0';
va_end(ap);
return retval;
}
int
vsprintf(char *buf, const char *cfmt, va_list ap)
{
int retval;
retval = kvprintf(cfmt, (void *)buf, 10, ap);
buf[retval] = '\0';
return retval;
}
/*
* Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
* order; return an optional length and a pointer to the last character
* written in the buffer (i.e., the first character of the string).
* The buffer pointed to by `nbuf' must have length >= MAXNBUF.
*/
static char *
ksprintn(char *nbuf, u_long ul, int base, int *lenp)
{
char *p;
p = nbuf;
*p = '\0';
do {
*++p = hex2ascii(ul % base);
} while (ul /= base);
if (lenp)
*lenp = p - nbuf;
return (p);
}
/* ksprintn, but for a quad_t. */
static char *
ksprintqn(char *nbuf, u_quad_t uq, int base, int *lenp)
{
char *p;
p = nbuf;
*p = '\0';
do {
*++p = hex2ascii(uq % base);
} while (uq /= base);
if (lenp)
*lenp = p - nbuf;
return (p);
}
/*
* Scaled down version of printf(3).
*
* Two additional formats:
*
* The format %b is supported to decode error registers.
* Its usage is:
*
* printf("reg=%b\n", regval, "<base><arg>*");
*
* where <base> is the output base expressed as a control character, e.g.
* \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
* the first of which gives the bit number to be inspected (origin 1), and
* the next characters (up to a control character, i.e. a character <= 32),
* give the name of the register. Thus:
*
* kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
*
* would produce output:
*
* reg=3<BITTWO,BITONE>
*
* XXX: %D -- Hexdump, takes pointer and separator string:
* ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
* ("%*D", len, ptr, " " -> XX XX XX XX ...
*/
/* RN: This normally takes a function for output.
* we always print to a string and the use HYPERCALL for write to console */
static int
kvprintf(char const *fmt, void *arg, int radix, va_list ap)
{
#define PCHAR(c) {int cc=(c); *d++ = cc; retval++; }
char nbuf[MAXNBUF];
char *p, *q, *d;
u_char *up;
int ch, n;
u_long ul;
u_quad_t uq;
int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
int dwidth;
char padc;
int retval = 0;
ul = 0;
uq = 0;
d = (char *) arg;
if (fmt == NULL)
fmt = "(fmt null)\n";
if (radix < 2 || radix > 36)
radix = 10;
for (;;) {
padc = ' ';
width = 0;
while ((ch = (u_char)*fmt++) != '%') {
if (ch == '\0')
return retval;
PCHAR(ch);
}
qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
sign = 0; dot = 0; dwidth = 0;
reswitch: switch (ch = (u_char)*fmt++) {
case '.':
dot = 1;
goto reswitch;
case '#':
sharpflag = 1;
goto reswitch;
case '+':
sign = 1;
goto reswitch;
case '-':
ladjust = 1;
goto reswitch;
case '%':
PCHAR(ch);
break;
case '*':
if (!dot) {
width = va_arg(ap, int);
if (width < 0) {
ladjust = !ladjust;
width = -width;
}
} else {
dwidth = va_arg(ap, int);
}
goto reswitch;
case '0':
if (!dot) {
padc = '0';
goto reswitch;
}
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
for (n = 0;; ++fmt) {
n = n * 10 + ch - '0';
ch = *fmt;
if (ch < '0' || ch > '9')
break;
}
if (dot)
dwidth = n;
else
width = n;
goto reswitch;
case 'b':
ul = va_arg(ap, int);
p = va_arg(ap, char *);
for (q = ksprintn(nbuf, ul, *p++, NULL); *q;)
PCHAR(*q--);
if (!ul)
break;
for (tmp = 0; *p;) {
n = *p++;
if (ul & (1 << (n - 1))) {
PCHAR(tmp ? ',' : '<');
for (; (n = *p) > ' '; ++p)
PCHAR(n);
tmp = 1;
} else
for (; *p > ' '; ++p)
continue;
}
if (tmp)
PCHAR('>');
break;
case 'c':
PCHAR(va_arg(ap, int));
break;
case 'D':
up = va_arg(ap, u_char *);
p = va_arg(ap, char *);
if (!width)
width = 16;
while(width--) {
PCHAR(hex2ascii(*up >> 4));
PCHAR(hex2ascii(*up & 0x0f));
up++;
if (width)
for (q=p;*q;q++)
PCHAR(*q);
}
break;
case 'd':
if (qflag)
uq = va_arg(ap, quad_t);
else if (lflag)
ul = va_arg(ap, long);
else
ul = va_arg(ap, int);
sign = 1;
base = 10;
goto number;
case 'l':
if (lflag) {
lflag = 0;
qflag = 1;
} else
lflag = 1;
goto reswitch;
case 'o':
if (qflag)
uq = va_arg(ap, u_quad_t);
else if (lflag)
ul = va_arg(ap, u_long);
else
ul = va_arg(ap, u_int);
base = 8;
goto nosign;
case 'p':
ul = (uintptr_t)va_arg(ap, void *);
base = 16;
sharpflag = (width == 0);
goto nosign;
case 'q':
qflag = 1;
goto reswitch;
case 'n':
case 'r':
if (qflag)
uq = va_arg(ap, u_quad_t);
else if (lflag)
ul = va_arg(ap, u_long);
else
ul = sign ?
(u_long)va_arg(ap, int) : va_arg(ap, u_int);
base = radix;
goto number;
case 's':
p = va_arg(ap, char *);
if (p == NULL)
p = "(null)";
if (!dot)
n = strlen (p);
else
for (n = 0; n < dwidth && p[n]; n++)
continue;
width -= n;
if (!ladjust && width > 0)
while (width--)
PCHAR(padc);
while (n--)
PCHAR(*p++);
if (ladjust && width > 0)
while (width--)
PCHAR(padc);
break;
case 'u':
if (qflag)
uq = va_arg(ap, u_quad_t);
else if (lflag)
ul = va_arg(ap, u_long);
else
ul = va_arg(ap, u_int);
base = 10;
goto nosign;
case 'x':
case 'X':
if (qflag)
uq = va_arg(ap, u_quad_t);
else if (lflag)
ul = va_arg(ap, u_long);
else
ul = va_arg(ap, u_int);
base = 16;
goto nosign;
case 'z':
if (qflag)
uq = va_arg(ap, u_quad_t);
else if (lflag)
ul = va_arg(ap, u_long);
else
ul = sign ?
(u_long)va_arg(ap, int) : va_arg(ap, u_int);
base = 16;
goto number;
nosign: sign = 0;
number:
if (qflag) {
if (sign && (quad_t)uq < 0) {
neg = 1;
uq = -(quad_t)uq;
}
p = ksprintqn(nbuf, uq, base, &tmp);
} else {
if (sign && (long)ul < 0) {
neg = 1;
ul = -(long)ul;
}
p = ksprintn(nbuf, ul, base, &tmp);
}
if (sharpflag && (qflag ? uq != 0 : ul != 0)) {
if (base == 8)
tmp++;
else if (base == 16)
tmp += 2;
}
if (neg)
tmp++;
if (!ladjust && width && (width -= tmp) > 0)
while (width--)
PCHAR(padc);
if (neg)
PCHAR('-');
if (sharpflag && (qflag ? uq != 0 : ul != 0)) {
if (base == 8) {
PCHAR('0');
} else if (base == 16) {
PCHAR('0');
PCHAR('x');
}
}
while (*p)
PCHAR(*p--);
if (ladjust && width && (width -= tmp) > 0)
while (width--)
PCHAR(padc);
break;
default:
PCHAR('%');
if (lflag)
PCHAR('l');
PCHAR(ch);
break;
}
}
#undef PCHAR
}
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