root/Whitix/trunk/kernel/print.c

/*  This file is part of Whitix.
 *
 *  Whitix 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.
 *
 *  Whitix is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Whitix; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <config.h>
#include <module.h>
#include <stdarg.h>
#include <string.h>
#include <typedefs.h>

#include <i386/ioports.h>

/* Defines */
#define CONSOLE_OUT_LEN         256

static void (*ConsoleOutput)(char* message, int length) = NULL;

void KeSetOutput(void (*newOutput)(char*, int))
{
        ConsoleOutput=newOutput;
}

SYMBOL_EXPORT(KeSetOutput);

int logLevelUnknown=1;
int currLogLevel=-1;

void KeVaPrint(const char* message, VaList args)
{
        char buf[CONSOLE_OUT_LEN];
        char outputBuf[CONSOLE_OUT_LEN];
        char* start;
        int length=0;
        
        length = vsnprintf(buf, CONSOLE_OUT_LEN, message, args);
        
        if (!length)
                return;
                
        length = 0;

        for (start=buf; *start; start++)
        {
                if (logLevelUnknown)
                {
                        /* Parse the beginning of the message to find out the log level. */
                        if (*start == '<')
                        {
                                currLogLevel=*(start+1)-'0';

                                /* Skip past the closing > */
                                start+=3;
                        }else
                                currLogLevel=1;

                        logLevelUnknown=0;
                }

                if (currLogLevel <= KERN_LOG_LEVEL)
                        outputBuf[length++]=*start;

                if (*start == '\n')
                        logLevelUnknown=1;
        }

        outputBuf[length]='\0';

        ConsoleOutput(outputBuf, length);
}

SYMBOL_EXPORT(KeVaPrint);

void KePrint(const char* message, ...)
{
        VaList args;
        
        VaStart(args, message);
        KeVaPrint(message, args);
        VaEnd(args);
}

SYMBOL_EXPORT(KePrint);