+/**
+ * @file logger.c
+ *
+ * @brief Logger object, allows fine-controlled logging
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+
+
+#include "logger.h"
+#include "types.h"
+#include "allocator.h"
+
+#include <syslog.h>
+#include <stdarg.h>
+
+
+
+/**
+ * @brief The logger object
+ */
+typedef struct private_logger_s private_logger_t;
+struct private_logger_s {
+ /**
+ * Public data
+ */
+ logger_t public;
+ /**
+ * fd to log, NULL for syslog
+ */
+ FILE *target;
+ /**
+ * detail-level of logger
+ */
+ logger_level_t level;
+ /**
+ * name of logger
+ */
+ char *name;
+};
+
+
+
+static status_t logg(private_logger_t *this, logger_level_t loglevel, char *format, ...)
+{
+ if ((this->level & loglevel) == loglevel)
+ {
+ va_list args;
+ va_start(args, format);
+
+ if (this->target)
+ {
+ fprintf(this->target, format, args);
+ fprintf(this->target, "\n");
+ }
+ else
+ {
+ syslog(LOG_INFO, format, args);
+ }
+ va_end(args);
+ }
+
+
+ return SUCCESS;
+}
+
+static status_t enable_level(private_logger_t *this, logger_level_t log_level)
+{
+ this->level |= log_level;
+ return SUCCESS;
+}
+
+static status_t disable_level(private_logger_t *this, logger_level_t log_level)
+{
+ this->level &= (~log_level);
+ return SUCCESS;
+}
+
+static status_t destroy(private_logger_t *this)
+{
+ if (this->target)
+ {
+ fclose(this->target);
+ }
+ allocator_free(this);
+ return SUCCESS;
+}
+
+
+logger_t *logger_create(char *logger_name, char *file, logger_level_t log_level)
+{
+ private_logger_t *this = allocator_alloc_thing(private_logger_t);
+
+ if (this == NULL)
+ {
+ return NULL;
+ }
+
+ this->public.log = (status_t(*)(logger_t*,logger_level_t,char*,...))logg;
+ this->public.enable_level = (status_t(*)(logger_t*,logger_level_t))enable_level;
+ this->public.disable_level = (status_t(*)(logger_t*,logger_level_t))disable_level;
+ this->public.destroy = (status_t(*)(logger_t*))destroy;
+
+ this->level = log_level;
+ this->name = logger_name;
+
+ /* use system logger ? */
+ if (file)
+ {
+ this->target = fopen(file, "a");
+ if (this->target == NULL)
+ {
+ allocator_free(this);
+ return NULL;
+ }
+ }
+ else
+ {
+ this->target = NULL;
+ openlog("charon", 0, LOG_DAEMON);
+ }
+
+ return (logger_t*)this;
+}
+
+