forked from Imagelibrary/rtems
ceead58b56
* libc/printk.c (printNum): Properly handle a maxwidth of 0 as reported by Nick Hennenfent <NICK.HENNENFENT@ROCHE.COM>.
152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/*-------------------------------------------------------------------------+
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| printk.c v1.1 - PC386 BSP - 1997/08/07
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+--------------------------------------------------------------------------+
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| (C) Copyright 1997 -
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| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
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| http://pandora.ist.utl.pt
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| Instituto Superior Tecnico * Lisboa * PORTUGAL
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+--------------------------------------------------------------------------+
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| Disclaimer:
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| This file is provided "AS IS" without warranty of any kind, either
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| expressed or implied.
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+--------------------------------------------------------------------------+
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| This code is based on code by: Jose Rufino - IST
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| $Id$
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+--------------------------------------------------------------------------*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdarg.h>
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#include <stdio.h>
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#include <bspIo.h>
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/* #include <libcpu/cpu.h> */
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/*-------------------------------------------------------------------------+
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| Function: printNum
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| Description: print number in a given base.
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| Global Variables: None.
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| Arguments: num - number to print, base - base used to print the number.
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| Returns: Nothing.
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+--------------------------------------------------------------------------*/
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static void
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printNum(long unsigned int num, int base, int sign, int maxwidth, int lead)
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{
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long unsigned int n;
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int count;
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char toPrint[20];
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if ( (sign == 1) && ((long)num < 0) ) {
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BSP_output_char('-');
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num = -num;
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if (maxwidth) maxwidth--;
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}
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count = 0;
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while ((n = num / base) > 0) {
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toPrint[count++] = (num - (n*base));
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num = n ;
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}
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toPrint[count++] = num;
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if (maxwidth) {
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for (n=maxwidth-count ; n ; n-- )
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BSP_output_char(lead);
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}
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for (n = 0; n < count; n++){
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BSP_output_char("0123456789ABCDEF"[(int)(toPrint[count-(n+1)])]);
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}
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} /* printNum */
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/*-------------------------------------------------------------------------+
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| Function: printk
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| Description: a simplified version of printf intended for use when the
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console is not yet initialized or in ISR's.
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| Global Variables: None.
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| Arguments: as in printf: fmt - format string, ... - unnamed arguments.
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| Returns: Nothing.
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+--------------------------------------------------------------------------*/
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void
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printk(char *fmt, ...)
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{
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va_list ap; /* points to each unnamed argument in turn */
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char c, *str;
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int lflag, base, sign, width, lead;
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/* unsigned int level; */
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/* _CPU_ISR_Disable(level); */
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va_start(ap, fmt); /* make ap point to 1st unnamed arg */
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for (; *fmt != '\0'; fmt++)
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{
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lflag = 0;
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base = 0;
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sign = 0;
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width = 0;
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lead = ' ';
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if (*fmt == '%')
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{
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fmt++;
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if (*fmt == '0' ) {
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lead = '0';
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fmt++;
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}
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while (*fmt >= '0' && *fmt <= '9' ) {
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width *= 10;
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width += (*fmt - '0');
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fmt++;
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}
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if ((c = *fmt) == 'l')
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{
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lflag = 1;
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c = *++fmt;
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}
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switch (c)
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{
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case 'o': case 'O': base = 8; sign = 0; break;
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case 'd': case 'D': base = 10; sign = 1; break;
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case 'u': case 'U': base = 10; sign = 0; break;
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case 'x': case 'X': base = 16; sign = 0; break;
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case 's':
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for (str = va_arg(ap, char *); *str; str++)
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BSP_output_char(*str);
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break;
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case 'c':
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#if 0
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#if defined(_TMS320C3x) || defined(_TMS320C4x)
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BSP_output_char(va_arg(ap, int));
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#else
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BSP_output_char(va_arg(ap, char));
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#endif
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#else
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BSP_output_char(va_arg(ap, int));
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#endif
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break;
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default:
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BSP_output_char(c);
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break;
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} /* switch*/
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if (base)
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printNum(lflag ? va_arg(ap, long int) : (long int)va_arg(ap, int),
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base, sign, width, lead);
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}
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else
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{
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BSP_output_char(*fmt);
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}
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}
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va_end(ap); /* clean up when done */
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/* _CPU_ISR_Enable(level); */
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} /* printk */
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