Squashed 'external/toxcore/c-toxcore/' content from commit 67badf69

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 67badf69416a74e74f6d7eb51dd96f37282b8455

other/bootstrap_daemon/src/log.h

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+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright © 2016-2018 The TokTok team.
+ * Copyright © 2015-2016 Tox project.
+ */
+
+/*
+ * Tox DHT bootstrap daemon.
+ * Logging utility with support of multiple logging backends.
+ */
+#ifndef C_TOXCORE_OTHER_BOOTSTRAP_DAEMON_SRC_LOG_H
+#define C_TOXCORE_OTHER_BOOTSTRAP_DAEMON_SRC_LOG_H
+
+#include <stdbool.h>
+
+#include "../../../toxcore/ccompat.h"
+
+typedef enum LOG_BACKEND {
+    LOG_BACKEND_STDOUT,
+    LOG_BACKEND_SYSLOG
+} LOG_BACKEND;
+
+typedef enum LOG_LEVEL {
+    LOG_LEVEL_INFO,
+    LOG_LEVEL_WARNING,
+    LOG_LEVEL_ERROR
+} LOG_LEVEL;
+
+/**
+ * Initializes logger.
+ * @param backend Specifies which backend to use.
+ * @return true on success, false if log is already opened.
+ */
+bool log_open(LOG_BACKEND backend);
+
+/**
+ * Releases all used resources by the logger.
+ * @return true on success, false if log is already closed.
+ */
+bool log_close(void);
+
+/**
+ * Writes a message to the log.
+ * @param level Log level to use.
+ * @param format printf-like format string.
+ * @param ... Zero or more arguments, similar to printf function.
+ * @return true on success, false if log is closed.
+ */
+bool log_write(LOG_LEVEL level, const char *format, ...) GNU_PRINTF(2, 3);
+
+
+#endif // C_TOXCORE_OTHER_BOOTSTRAP_DAEMON_SRC_LOG_H