log: Add log interface

This patch adds the interface which every platform should implement to have
logging capabilities.

1 files changed, 41 insertions, 0 deletions

diff --git a/stack/log.h b/stack/log.h
new file mode 100644
index 0000000..4ffa75f
--- /dev/null
+++ b/stack/log.h
@@ -0,0 +1,41 @@
+/**
+ *  The MIT License (MIT)
+ *
+ *  Copyright (c) 2013 Paulo B. de Oliveira Filho <pauloborgesfilho@gmail.com>
+ *  Copyright (c) 2013 Claudio Takahasi <claudio.takahasi@gmail.com>
+ *  Copyright (c) 2013 João Paulo Rechi Vita <jprvita@gmail.com>
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+int16_t log_init(void);
+void log_print(const char *format, ...);
+
+#define __ONLYFILE__							\
+	(strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__)
+
+#define LOG(level, fmt, arg...)						\
+	do {								\
+		log_print(level ":%s:%s() " fmt "\r\n",			\
+					__ONLYFILE__, __func__, ## arg);	\
+	} while (0)
+
+#define DBG(fmt, arg...)		LOG("DEBUG", fmt, ## arg)
+
+#define ERROR(fmt, arg...)		LOG("ERROR", fmt, ## arg)