Move syslog utility functions into a separate file so they can be re-used.

This has the pleasant side effect of cleaning up the header inclusion process
in logger.c.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@203508 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/syslog.h

@@ -0,0 +1,71 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2009, malleable, LLC.
+ *
+ * Sean Bright <sean@malleable.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*!
+ * \file syslog.h
+ * \brief Syslog support functions for Asterisk logging.
+ */
+
+#ifndef _ASTERISK_SYSLOG_H
+#define _ASTERISK_SYSLOG_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/*!
+ * \since 1.6.3
+ * \brief Maps a syslog facility name from a string to a syslog facility
+ *        constant.
+ *
+ * \param facility Facility name to map (i.e. "daemon")
+ *
+ * \retval syslog facility constant (i.e. LOG_DAEMON) if found
+ * \retval -1 if facility is not found
+ */
+int ast_syslog_facility(const char *facility);
+
+/*!
+ * \since 1.6.3
+ * \brief Maps a syslog priority name from a string to a syslog priority
+ *        constant.
+ *
+ * \param priority Priority name to map (i.e. "notice")
+ *
+ * \retval syslog priority constant (i.e. LOG_NOTICE) if found
+ * \retval -1 if priority is not found
+ */
+int ast_syslog_priority(const char *priority);
+
+/*!
+ * \since 1.6.3
+ * \brief Maps an Asterisk log level (i.e. LOG_ERROR) to a syslog priority
+ *        constant.
+ *
+ * \param level Asterisk log level constant (i.e. LOG_ERROR)
+ *
+ * \retval syslog priority constant (i.e. LOG_ERR) if found
+ * \retval -1 if priority is not found
+ */
+int ast_syslog_priority_from_loglevel(int level);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* _ASTERISK_SYSLOG_H */