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/*
* (C) Copyright 1997 -
* - NavIST Group - Real-Time Distributed Systems and Industrial Automation
*
* http://pandora.ist.utl.pt
*
* Instituto Superior Tecnico * Lisboa * PORTUGAL
*
* Disclaimer:
*
* This file is provided "AS IS" without warranty of any kind, either
* expressed or implied.
*
* This code is based on code by: Jose Rufino - IST
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <stdio.h>
#include <rtems/bspIo.h>
/*
* printNum - print number in a given base.
* Arguments
* num - number to print
* base - base used to print the number.
*/
static void printNum(
long unsigned int num,
int base,
int sign,
int maxwidth,
int lead
)
{
long unsigned int n;
int count;
char toPrint[20];
if ( (sign == 1) && ((long)num < 0) ) {
BSP_output_char('-');
num = -num;
if (maxwidth) maxwidth--;
}
count = 0;
while ((n = num / base) > 0) {
toPrint[count++] = (num - (n*base));
num = n;
}
toPrint[count++] = num;
for (n=maxwidth ; n > count; n-- )
BSP_output_char(lead);
for (n = 0; n < count; n++) {
BSP_output_char("0123456789ABCDEF"[(int)(toPrint[count-(n+1)])]);
}
}
/*
* vprintk
*
* A simplified version of printf intended for use when the
* console is not yet initialized or in ISR's.
*
* Arguments:
* as in printf: fmt - format string, ... - unnamed arguments.
*/
void vprintk(
const char *fmt,
va_list ap
)
{
char c, *str;
int lflag, base, sign, width, lead, minus;
for (; *fmt != '\0'; fmt++) {
lflag = 0;
base = 0;
sign = 0;
width = 0;
minus = 0;
lead = ' ';
if (*fmt == '%') {
fmt++;
if (*fmt == '0' ) {
lead = '0';
fmt++;
}
if (*fmt == '-' ) {
minus = 1;
fmt++;
}
while (*fmt >= '0' && *fmt <= '9' ) {
width *= 10;
width += (*fmt - '0');
fmt++;
}
if ((c = *fmt) == 'l') {
lflag = 1;
c = *++fmt;
}
switch (c) {
case 'o': case 'O': base = 8; sign = 0; break;
case 'i': case 'I':
case 'd': case 'D': base = 10; sign = 1; break;
case 'u': case 'U': base = 10; sign = 0; break;
case 'x': case 'X': base = 16; sign = 0; break;
case 'p': base = 16; sign = 0; break;
case 's':
{ int i, len;
char *s;
str = va_arg(ap, char *);
/* calculate length of string */
for ( len=0, s=str ; *s ; len++, s++ )
;
/* leading spaces */
if ( !minus )
for ( i=len ; i<width ; i++ )
BSP_output_char(' ');
/* output the string */
for ( i=0 ; i<width && *str ; str++ )
BSP_output_char(*str);
/* trailing spaces */
if ( minus )
for ( i=len ; i<width ; i++ )
BSP_output_char(' ');
}
break;
case 'c':
BSP_output_char(va_arg(ap, int));
break;
default:
BSP_output_char(c);
break;
} /* switch*/
if (base)
printNum(lflag ? va_arg(ap, long int) : (long int)va_arg(ap, int),
base, sign, width, lead);
} else {
BSP_output_char(*fmt);
}
}
}
/*
* printk
*
* Kernel printf function requiring minimal infrastrure.
*/
void printk(const char *fmt, ...)
{
va_list ap; /* points to each unnamed argument in turn */
va_start(ap, fmt); /* make ap point to 1st unnamed arg */
vprintk(fmt, ap);
va_end(ap); /* clean up when done */
}
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