pulseaudio/src/polypcore/log.c

/* $Id$ */

/***
  This file is part of polypaudio.
 
  polypaudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2 of the
  License, or (at your option) any later version.
 
  polypaudio 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 Lesser General Public
  License along with polypaudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>

#ifdef HAVE_SYSLOG_H
#include <syslog.h>
#endif

#include <polypcore/xmalloc.h>
#include <polypcore/util.h>

#include "log.h"

#define ENV_LOGLEVEL "POLYP_LOG"

static char *log_ident = NULL;
static pa_log_target_t log_target = PA_LOG_STDERR;
static void (*user_log_func)(pa_log_level_t l, const char *s) = NULL;
static pa_log_level_t maximal_level = PA_LOG_NOTICE;

#ifdef HAVE_SYSLOG_H
static const int level_to_syslog[] = {
    [PA_LOG_ERROR] = LOG_ERR,
    [PA_LOG_WARN] = LOG_WARNING,
    [PA_LOG_NOTICE] = LOG_NOTICE,
    [PA_LOG_INFO] = LOG_INFO,
    [PA_LOG_DEBUG] = LOG_DEBUG
};
#endif

void pa_log_set_ident(const char *p) {
    if (log_ident)
        pa_xfree(log_ident);

    log_ident = pa_xstrdup(p);
}

void pa_log_set_maximal_level(pa_log_level_t l) {
    assert(l < PA_LOG_LEVEL_MAX);
    maximal_level = l;
}

void pa_log_set_target(pa_log_target_t t, void (*func)(pa_log_level_t l, const char*s)) {
    assert(t == PA_LOG_USER || !func);
    log_target = t;
    user_log_func = func;
}

void pa_log_levelv(pa_log_level_t level, const char *format, va_list ap) {
    const char *e;
    assert(level < PA_LOG_LEVEL_MAX);

    if ((e = getenv(ENV_LOGLEVEL)))
        maximal_level = atoi(e);
    
    if (level > maximal_level)
        return;

    switch (log_target) {
        case PA_LOG_STDERR:
            vfprintf(stderr, format, ap);
            break;

#ifdef HAVE_SYSLOG_H            
        case PA_LOG_SYSLOG:
            openlog(log_ident ? log_ident : "???", LOG_PID, LOG_USER);
            vsyslog(level_to_syslog[level], format, ap);
            closelog();
            break;            
#endif

        case PA_LOG_USER: {
            char *t = pa_vsprintf_malloc(format, ap);
            assert(user_log_func);
            user_log_func(level, t);
	    pa_xfree(t);
        }
            
        case PA_LOG_NULL:
        default:
            break;
    }

}

void pa_log_level(pa_log_level_t level, const char *format, ...) {
    va_list ap;
    va_start(ap, format);
    pa_log_levelv(level, format, ap);
    va_end(ap);
}

void pa_log_debug(const char *format, ...) {
    va_list ap;
    va_start(ap, format);
    pa_log_levelv(PA_LOG_DEBUG, format, ap);
    va_end(ap);
}

void pa_log_info(const char *format, ...) {
    va_list ap;
    va_start(ap, format);
    pa_log_levelv(PA_LOG_INFO, format, ap);
    va_end(ap);
}

void pa_log_notice(const char *format, ...) {
    va_list ap;
    va_start(ap, format);
    pa_log_levelv(PA_LOG_INFO, format, ap);
    va_end(ap);
}

void pa_log_warn(const char *format, ...) {
    va_list ap;
    va_start(ap, format);
    pa_log_levelv(PA_LOG_WARN, format, ap);
    va_end(ap);
}

void pa_log_error(const char *format, ...) {
    va_list ap;
    va_start(ap, format);
    pa_log_levelv(PA_LOG_ERROR, format, ap);
    va_end(ap);
}