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/*
* 1394-Based Digital Camera Control Library
*
* Error logging functions
*
* Written by Damien Douxchamps <ddouxchamps@users.sf.net> and
* Rudolf Leitgeb
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "log.h"
#include <stdarg.h>
#include <stdlib.h>
static void
default_errorlog_handler(dc1394log_t type, const char *message, void* user)
{
fprintf(stderr, "libdc1394 error: %s\n", message);
}
static void
default_warninglog_handler(dc1394log_t type, const char *message, void* user)
{
fprintf(stderr, "libdc1394 warning: %s\n", message);
}
static void
default_debuglog_handler(dc1394log_t type, const char *message, void* user)
{
static int log_enabled = -1;
if (log_enabled == -1) {
if (getenv("DC1394_DEBUG") == NULL )
log_enabled = 0;
else
log_enabled = 1;
}
if (log_enabled == 1)
fprintf(stderr, "libdc1394 debug: %s\n", message);
}
static void(*system_errorlog_handler)(dc1394log_t type, const char *message, void* user) = default_errorlog_handler;
static void(*system_warninglog_handler)(dc1394log_t type, const char *message, void* user) = default_warninglog_handler;
static void(*system_debuglog_handler)(dc1394log_t type, const char *message, void* user) = default_debuglog_handler;
static void *errorlog_data = NULL;
static void *warninglog_data = NULL;
static void *debuglog_data = NULL;
dc1394error_t
dc1394_log_register_handler(dc1394log_t type, void(*log_handler)(dc1394log_t type, const char *message, void* user), void* user) {
switch (type) {
case DC1394_LOG_ERROR:
system_errorlog_handler = log_handler;
errorlog_data=user;
return DC1394_SUCCESS;
case DC1394_LOG_WARNING:
system_warninglog_handler = log_handler;
warninglog_data=user;
return DC1394_SUCCESS;
case DC1394_LOG_DEBUG:
system_debuglog_handler = log_handler;
debuglog_data=user;
return DC1394_SUCCESS;
default:
return DC1394_INVALID_LOG_TYPE;
}
}
dc1394error_t
dc1394_log_set_default_handler(dc1394log_t type) {
switch (type) {
case DC1394_LOG_ERROR:
system_errorlog_handler = default_errorlog_handler;
errorlog_data=NULL;
return DC1394_SUCCESS;
case DC1394_LOG_WARNING:
system_warninglog_handler = default_warninglog_handler;
warninglog_data=NULL;
return DC1394_SUCCESS;
case DC1394_LOG_DEBUG:
system_debuglog_handler = default_debuglog_handler;
debuglog_data=NULL;
return DC1394_SUCCESS;
default:
return DC1394_INVALID_LOG_TYPE;
}
}
void dc1394_log_error(const char *format,...)
{
char string[1024];
if (system_errorlog_handler != NULL) {
va_list args;
va_start(args, format);
vsnprintf(string, sizeof(string), format, args);
system_errorlog_handler(DC1394_LOG_ERROR, string, errorlog_data);
}
}
void dc1394_log_warning(const char *format,...)
{
char string[1024];
if (system_warninglog_handler != NULL) {
va_list args;
va_start(args, format);
vsnprintf(string, sizeof(string), format, args);
system_warninglog_handler(DC1394_LOG_WARNING, string, warninglog_data);
}
}
void dc1394_log_debug(const char *format,...)
{
char string[1024];
if (system_debuglog_handler != NULL) {
va_list args;
va_start(args, format);
vsnprintf(string, sizeof(string), format, args);
system_debuglog_handler(DC1394_LOG_DEBUG, string, debuglog_data);
}
}
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