log_default.c

/* $Id: log_default.c,v 1.6 2010/06/22 21:11:47 drvee Exp $
 * Copyright (c) 2001, Bit Farm, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <log4c.h>
#include <macros.h>
#include <stdio.h>

/**
 * The root category's default logging function.
 */

static char *priorityNames[] = {
    "Zero Priority",
    "TRACE",
    "DEBUG",
    "INFO",
    "NOTICE",
    "WARNING",
    "ERROR",
    "CRITICAL ERROR",
    "ALERT",
    "EMERGENCY",
};

static void doAppend(struct LogAppender* this, struct LogEvent* ev);

static struct DefaultLogAppender {
    struct LogAppender appender;
    FILE *file;
    int printLoc;
} defaultLogAppender = { { doAppend }, NULL, 1 } ;

struct LogAppender* log_defaultLogAppender  = &defaultLogAppender.appender;

static void doAppend(struct LogAppender* this0, struct LogEvent* ev) {

    // TODO: define a format field in struct for timestamp, etc.
    char *pn = NULL;
    char buf[20];
    struct DefaultLogAppender* this = (struct DefaultLogAppender*)this0;
    
    if (this->file == NULL) this->file = stderr;
    
    if (ev->priority < 0) {
        pn = "???";
    }
    else if ((size_t)ev->priority < ARRAY_LENGTH(priorityNames)) {
        pn = priorityNames[ev->priority];
    } else {
        sprintf(buf, "%s+%d",
                priorityNames[ARRAY_LENGTH(priorityNames)-1],
                ev->priority - (int) sizeof(priorityNames) + 1);
    }
    fprintf(this->file, "%-7s ", pn);
    if (this->printLoc)
        fprintf(this->file, "%s:%d:%s\t",
                ev->fileName, ev->lineNum, ev->functionName);
    else
        fprintf(this->file, "%s: ",
                ev->cat->name);
    vfprintf(this->file, ev->fmt, ev->ap);
    fprintf(this->file, "\n");
}