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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Daniel Stenberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* logf() logs MAX_LOGF_ENTRY (21) bytes per entry in a circular buffer. Each
* logged string is space- padded for easier and faster output on screen. Just
* output MAX_LOGF_ENTRY characters on each line. MAX_LOGF_ENTRY bytes fit
* nicely on the iRiver remote LCD (128 pixels with an 8x6 pixels font).
*/
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <sprintf.h>
#include "config.h"
#include "lcd-remote.h"
#include "logf.h"
/* Only provide all this if asked to */
#ifdef ROCKBOX_HAS_LOGF
unsigned char logfbuffer[MAX_LOGF_LINES][MAX_LOGF_ENTRY];
int logfindex;
bool logfwrap;
#ifdef HAVE_REMOTE_LCD
static void displayremote(void)
{
/* TODO: we should have a debug option that enables/disables this! */
int w, h;
int lines;
int columns;
int i;
int index;
lcd_remote_getstringsize("A", &w, &h);
lines = LCD_REMOTE_HEIGHT/h;
columns = LCD_REMOTE_WIDTH/w;
lcd_remote_setmargins(0, 0);
lcd_remote_clear_display();
index = logfindex;
for(i = lines-1; i>=0; i--) {
unsigned char buffer[columns+1];
if(--index < 0) {
if(logfwrap)
index = MAX_LOGF_LINES-1;
else
break; /* done */
}
memcpy(buffer, logfbuffer[index], columns);
buffer[columns]=0;
lcd_remote_puts(0, i, buffer);
}
lcd_remote_update();
}
#else
#define displayremote()
#endif
void logf(const char *format, ...)
{
int len;
unsigned char *ptr;
va_list ap;
va_start(ap, format);
if(logfindex >= MAX_LOGF_LINES) {
/* wrap */
logfwrap = true;
logfindex = 0;
}
ptr = logfbuffer[logfindex];
len = vsnprintf(ptr, MAX_LOGF_ENTRY, format, ap);
va_end(ap);
if(len < MAX_LOGF_ENTRY)
/* pad with spaces up to the MAX_LOGF_ENTRY byte border */
memset(ptr+len, ' ', MAX_LOGF_ENTRY-len);
logfindex++; /* leave it where we write the next time */
displayremote();
}
#endif
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