61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 by Daniel Stenberg
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*
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* logf() logs 16 bytes in a circular buffer. Each logged string is space-
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* padded for easier and faster output on screen. Just output 16 lines on each
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* line. 16 bytes fit nicely on the iRiver remote LCD (128 pixels with an 8
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* pixels font).
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <sprintf.h>
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#include <stdbool.h>
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#include "config.h"
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#define MAX_LOGF_LINES 1000
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#define MAX_LOGF_DATASIZE (16*MAX_LOGF_LINES)
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unsigned char logfbuffer[MAX_LOGF_DATASIZE];
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unsigned char *logfend=&logfbuffer[MAX_LOGF_DATASIZE];
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unsigned char *logfptr=&logfbuffer[0];
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bool logfwrap;
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void logf(const char *format, ...)
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{
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int len;
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va_list ap;
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va_start(ap, format);
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if(logfptr >= logfend) {
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/* wrap */
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logfwrap = true;
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logfptr = &logfbuffer[0];
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}
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len = vsnprintf(logfptr, 16, format, ap);
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va_end(ap);
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if(len < 16)
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/* pad with spaces up to the 16 byte border */
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memset(logfptr+len, ' ', 16-len);
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logfptr += 16; /* leave it where we write the next time */
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}
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