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/*
Copyright (C) 2003, 2004, 2008, 2011, 2012, 2015
Rocky Bernstein <rocky@gnu.org>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
# define __CDIO_CONFIG_H__ 1
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#endif
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#include <cdio/logging.h>
#include "cdio_assert.h"
#include "portable.h"
#include <assert.h>
cdio_log_level_t cdio_loglevel_default = CDIO_LOG_WARN;
extern void
cdio_default_log_handler(cdio_log_level_t level, const char message[])
{
switch (level)
{
case CDIO_LOG_ERROR:
if (level >= cdio_loglevel_default) {
fprintf (stderr, "**ERROR: %s\n", message);
fflush (stderr);
}
exit (EXIT_FAILURE);
break;
case CDIO_LOG_DEBUG:
if (level >= cdio_loglevel_default) {
fprintf (stdout, "--DEBUG: %s\n", message);
}
break;
case CDIO_LOG_WARN:
if (level >= cdio_loglevel_default) {
fprintf (stdout, "++ WARN: %s\n", message);
}
break;
case CDIO_LOG_INFO:
if (level >= cdio_loglevel_default) {
fprintf (stdout, " INFO: %s\n", message);
}
break;
case CDIO_LOG_ASSERT:
if (level >= cdio_loglevel_default) {
fprintf (stderr, "!ASSERT: %s\n", message);
fflush (stderr);
}
abort ();
break;
default:
cdio_assert_not_reached ();
break;
}
fflush (stdout);
}
cdio_log_handler_t _handler = cdio_default_log_handler;
cdio_log_handler_t
cdio_log_set_handler(cdio_log_handler_t new_handler)
{
cdio_log_handler_t old_handler = _handler;
_handler = new_handler;
return old_handler;
}
static void
cdio_logv(cdio_log_level_t level, const char format[], va_list args)
{
char buf[1024] = { 0, };
/* _handler() is user defined and we want to make sure _handler()
doesn't call us, cdio_logv. in_recursion is used for that, however
it has a problem in multi-threaded programs. I'm not sure how to
handle multi-threading and recursion checking both. For now, we'll
leave in the recursion checking, at the expense of handling
multi-threaded log calls. To ameliorate this, we'll check the log
level and handle calls where there is no output, before the
recursion check.
*/
static int in_recursion = 0;
if (level < cdio_loglevel_default) return;
if (in_recursion) {
/* Can't use cdio_assert_not_reached() as that may call cdio_logv */
assert(0);
}
in_recursion = 1;
vsnprintf(buf, sizeof(buf)-1, format, args);
_handler(level, buf);
in_recursion = 0;
}
void
cdio_log(cdio_log_level_t level, const char format[], ...)
{
va_list args;
va_start (args, format);
cdio_logv (level, format, args);
va_end (args);
}
#define CDIO_LOG_TEMPLATE(level, LEVEL) \
void \
cdio_ ## level (const char format[], ...) \
{ \
va_list args; \
va_start (args, format); \
cdio_logv (CDIO_LOG_ ## LEVEL, format, args); \
va_end (args); \
}
CDIO_LOG_TEMPLATE(debug, DEBUG)
CDIO_LOG_TEMPLATE(info, INFO)
CDIO_LOG_TEMPLATE(warn, WARN)
CDIO_LOG_TEMPLATE(error, ERROR)
#undef CDIO_LOG_TEMPLATE
/*
* Local variables:
* c-file-style: "gnu"
* tab-width: 8
* indent-tabs-mode: nil
* End:
*/
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