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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2012 by Amaury Pouly
*
* 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.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "logf.h"
#include "format.h"
#include "string.h"
#include "memory.h"
static unsigned char logfbuffer[MAX_LOGF_SIZE];
static int logfread = 0;
static int logfwrite = 0;
static int logfen = true;
void enable_logf(bool en)
{
logfen = en;
}
static int logf_push(void *userp, unsigned char c)
{
(void)userp;
logfbuffer[logfwrite++] = c;
if(logfwrite == MAX_LOGF_SIZE)
logfwrite = 0;
return true;
}
void logf(const char *fmt, ...)
{
if(!logfen) return;
va_list ap;
va_start(ap, fmt);
vuprintf(logf_push, NULL, fmt, ap);
va_end(ap);
}
size_t logf_readback(char *buf, size_t max_size)
{
if(logfread == logfwrite)
return 0;
if(logfread < logfwrite)
max_size = MIN(max_size, (size_t)(logfwrite - logfread));
else
max_size = MIN(max_size, (size_t)(MAX_LOGF_SIZE - logfread));
memcpy(buf, &logfbuffer[logfread], max_size);
logfread += max_size;
if(logfread == MAX_LOGF_SIZE)
logfread = 0;
return max_size;
}
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