Coding style in markdown.

CodingStyle.md

@@ -0,0 +1,56 @@
+vim: spelllang=en tw=78
+
+This is a short introduction to the coding style that shall be used. The below
+rules are applicable for all C source files, except the Ethernet drivers, for
+which the Linux Kernel coding style shall be used to minimize the
+differences).
+
+# Line length
+
+- Lines shall not exceed 78 characters.
+
+# Whitespace
+
+- Indentation shall be done using 4 space characters
+
+- No whitespace shall be left at the end of a line.
+
+- After commas, colons and semicolons, a single space shall be
+  placed (if not followed by a line break).
+
+- Binary operators (`=`, `==`, `~=`, `|`, `||`, etc.) shall be enclosed by 2 spaces
+  (except `.` and `->`).
+
+# Placing braces
+
+- Braces shall be placed in the following way (K&R style):
+
+```c
+if (...) {
+    ...
+} else if (...) {
+    ...
+} else {
+    ...
+}
+
+int function(...)
+{
+    ...
+}
+```
+
+# Defines and Macros
+
+- Defines and macros shall be named in CAPITAL letters. If a macro contains
+  multiple statements, they should be enclosed by a 'do {} while (0)' loop.
+  Macro parameters shall also be capital letters and shall be enclosed py
+  parantheses if necessary.
+
+```c
+#define MACRO(A, B) \
+    do { \
+        if ((A) == 1) { \
+            statement(B); \
+        } while (0)
+```