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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>
static void printNum(
long unsigned int num,
int base,
int sign,
int maxwidth,
int lead
);
/*
* 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 != '%') {
BSP_output_char(*fmt);
continue;
}
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;
}
if ( c == 'c' ) {
BSP_output_char(va_arg(ap, int));
continue;
}
if ( c == '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(' ');
/* no width option */
if (width == 0) {
width = len;
}
/* 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(' ');
continue;
}
/* must be a numeric format or something unsupported */
if ( c == 'o' || c == 'O' ) {
base = 8; sign = 0;
} else if ( c == 'i' || c == 'I' ||
c == 'd' || c == 'D' ) {
base = 10; sign = 1;
} else if ( c == 'u' || c == 'U' ) {
base = 10; sign = 0;
} else if ( c == 'x' || c == 'X' ) {
base = 16; sign = 0;
} else if ( c == 'p' ) {
base = 16; sign = 0; lflag = 1;
} else {
BSP_output_char(c);
continue;
}
printNum(
lflag ? va_arg(ap, long int) : (long int)va_arg(ap, int),
base,
sign,
width,
lead
);
}
}
/*
* 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)])]);
}
}
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