printf.c

来自「bootup code for Barebone, it s useful fo」· C语言 代码 · 共 36 行

/*
 * Copyright (C) 2001 MontaVista Software Inc.
 * Author: Jun Sun, [e-mail] or [e-mail]
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */

#include "printf.h"
#include "print.h"
#include "uart16550.h"

static void myoutput(void *arg, char *s, int l)
{
    int i;

    // special termination call
    if ((l==1) && (s[0] == '\0')) return;
    
    for (i=0; i< l; i++) {
	Uart16550Put(s[i]);
	if (s[i] == '\n') Uart16550Put('\r');
    }
}

void printf(char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    lp_Print(myoutput, 0, fmt, ap);
    va_end(ap);
}