Make logger a global object instead of an instance

Passing Logger object into every function isn't fun. See for yourself:
something as simple as a public key printing function turns from
>void print_public_key(const uint8_t *public_key)
to
>void print_public_key(Logger *logger, const uint8_t *public_key)

1 files changed, 115 insertions, 0 deletions

diff --git a/other/bootstrap_daemon/src/log.c b/other/bootstrap_daemon/src/log.c
new file mode 100644
index 00000000..dff2dbad
--- /dev/null
+++ b/other/bootstrap_daemon/src/log.c
@@ -0,0 +1,115 @@
+/* logger.c
+ *
+ * Tox DHT bootstrap daemon.
+ *
+ *  Copyright (C) 2015 Tox project All Rights Reserved.
+ *
+ *  This file is part of Tox.
+ *
+ *  Tox 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.
+ *
+ *  Tox 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 Tox.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "log.h"
+
+#include "global.h"
+
+#include <syslog.h>
+
+#include <stdarg.h>
+#include <stdio.h>
+
+LOGGER_BACKEND current_backend = -1;
+
+bool open_log(LOGGER_BACKEND backend)
+{
+    if (current_backend != -1) {
+        return false;
+    }
+
+    if (backend == LOGGER_BACKEND_SYSLOG) {
+        openlog(DAEMON_NAME, LOG_NOWAIT | LOG_PID, LOG_DAEMON);
+    }
+
+    current_backend = backend;
+
+    return true;
+}
+
+bool close_log()
+{
+    if (current_backend == -1) {
+        return false;
+    }
+
+    if (current_backend == LOGGER_BACKEND_SYSLOG) {
+        closelog();
+    }
+
+    current_backend = -1;
+
+    return true;
+}
+
+int level_syslog(LOG_LEVEL level)
+{
+    switch (level) {
+        case LOG_LEVEL_INFO:
+            return LOG_INFO;
+        case LOG_LEVEL_WARNING:
+            return LOG_WARNING;
+        case LOG_LEVEL_ERROR:
+            return LOG_ERR;
+    }
+}
+
+void log_syslog(LOG_LEVEL level, const char *format, va_list args)
+{
+    vsyslog(level_syslog(level), format, args);
+}
+
+FILE* level_stdout(LOG_LEVEL level)
+{
+    switch (level) {
+        case LOG_LEVEL_INFO:
+            return stdout;
+        case LOG_LEVEL_WARNING: // intentional fallthrough
+        case LOG_LEVEL_ERROR:
+            return stderr;
+    }
+}
+
+void log_stdout(LOG_LEVEL level, const char *format, va_list args)
+{
+    vfprintf(level_stdout(level), format, args);
+}
+
+bool log(LOG_LEVEL level, const char *format, ...)
+{
+    va_list args;
+    va_start(args, format);
+
+    switch (current_backend) {
+        case LOGGER_BACKEND_SYSLOG:
+            log_syslog(level, format, args);
+            break;
+        case LOGGER_BACKEND_STDOUT:
+            log_stdout(level, format, args);
+            break;
+    }
+
+    va_end(args);
+
+    return current_backend != -1;
+}