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/*
$Id$
Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
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 program 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 General Public License
along with this program; 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 <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
extern int fred;
#include "mjpeg_logging.h"
static const char _rcsid[] = "$Id: ";
#define MAX_DEFAULT_ID_SIZE 16
#define DEFAULT_DEFAULT_ID "???"
#ifdef HAVE___PROGNAME
extern const char *__progname;
#endif
static log_level_t mjpeg_log_verbosity = (log_level_t) 0;
static char default_handler_id[MAX_DEFAULT_ID_SIZE];
static char default_handler_id_is_set = 0;
static int
default_mjpeg_log_filter (log_level_t level)
{
int verb_from_env;
if (mjpeg_log_verbosity == 0) {
char *mjpeg_verb_env = getenv ("MJPEG_VERBOSITY");
if (mjpeg_verb_env != NULL) {
verb_from_env = LOG_WARN - atoi (mjpeg_verb_env);
if (verb_from_env >= LOG_DEBUG && verb_from_env <= LOG_ERROR)
mjpeg_log_verbosity = (log_level_t) verb_from_env;
}
}
return (level < LOG_WARN && level < mjpeg_log_verbosity);
}
static mjpeg_log_filter_t _filter = default_mjpeg_log_filter;
static void
default_mjpeg_log_handler (log_level_t level, const char message[])
{
const char *ids;
if ((*_filter) (level))
return;
if (default_handler_id_is_set) {
ids = default_handler_id;
} else {
#ifdef HAVE___PROGNAME
ids = __progname;
#else
ids = DEFAULT_DEFAULT_ID;
#endif
}
switch (level) {
case LOG_ERROR:
fprintf (stderr, "**ERROR: [%s] %s\n", ids, message);
break;
case LOG_DEBUG:
fprintf (stderr, "--DEBUG: [%s] %s\n", ids, message);
break;
case LOG_WARN:
fprintf (stderr, "++ WARN: [%s] %s\n", ids, message);
break;
case LOG_INFO:
fprintf (stderr, " INFO: [%s] %s\n", ids, message);
break;
default:
assert (0);
}
}
static mjpeg_log_handler_t _handler = default_mjpeg_log_handler;
mjpeg_log_handler_t
mjpeg_log_set_handler (mjpeg_log_handler_t new_handler)
{
mjpeg_log_handler_t old_handler = _handler;
_handler = new_handler;
return old_handler;
}
/***************
*
* Set default log handlers degree of verboseity.
* 0 = quiet, 1 = info, 2 = debug
*
*************/
int
mjpeg_default_handler_verbosity (int verbosity)
{
int prev_verb = mjpeg_log_verbosity;
mjpeg_log_verbosity = (log_level_t) (LOG_WARN - (log_level_t) verbosity);
return prev_verb;
}
/*
* Set identifier string used by default handler
*
*/
int
mjpeg_default_handler_identifier (const char *new_id)
{
const char *s;
if (new_id == NULL) {
default_handler_id_is_set = 0;
return 0;
}
/* find basename of new_id (remove any directory prefix) */
if ((s = strrchr (new_id, '/')) == NULL)
s = new_id;
else
s = s + 1;
strncpy (default_handler_id, s, MAX_DEFAULT_ID_SIZE);
default_handler_id[MAX_DEFAULT_ID_SIZE - 1] = '\0';
default_handler_id_is_set = 1;
return 0;
}
static void
mjpeg_logv (log_level_t level, const char format[], va_list args)
{
char buf[1024] = { 0, };
/* TODO: Original had a re-entrancy error trap to assist bug
finding. To make this work with multi-threaded applications a
lock is needed hence delete.
*/
vsnprintf (buf, sizeof (buf) - 1, format, args);
_handler (level, buf);
}
void
mjpeg_log (log_level_t level, const char format[], ...)
{
va_list args;
va_start (args, format);
mjpeg_logv (level, format, args);
va_end (args);
}
void
mjpeg_debug (const char format[], ...)
{
va_list args;
va_start (args, format);
mjpeg_logv (LOG_DEBUG, format, args);
va_end (args);
}
void
mjpeg_info (const char format[], ...)
{
va_list args;
va_start (args, format);
mjpeg_logv (LOG_INFO, format, args);
va_end (args);
}
void
mjpeg_warn (const char format[], ...)
{
va_list args;
va_start (args, format);
mjpeg_logv (LOG_WARN, format, args);
va_end (args);
}
void
mjpeg_error (const char format[], ...)
{
va_list args;
va_start (args, format);
mjpeg_logv (LOG_ERROR, format, args);
va_end (args);
}
void
mjpeg_error_exit1 (const char format[], ...)
{
va_list args;
va_start (args, format);
mjpeg_logv (LOG_ERROR, format, args);
va_end (args);
exit (EXIT_FAILURE);
}
/*
* Local variables:
* c-file-style: "gnu"
* tab-width: 8
* indent-tabs-mode: nil
* End:
*/
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