seperate out general good C practice from the style guide

docs/dev/correct-c.md

@@ -0,0 +1,13 @@
+# Correct C
+A monster list about bad code practices for the absolute beginners.
+Things obviously should be taken with a grain of salt, just stating the obvious.
+
+- Functions without parameters will be defined with `void` in the parameter list, as opposed to leaving it empty. (e.i. `(void)` rather than `()`)
+- (public-facing) names mustn't be prefixed with `_`, this is a reserved identifier.
+- `typedef`s mustn't be suffixed with `_t`, this is a POSIX reserved identifier.
+- `typedef`s are discouraged, unless the name alias is clear in what it stores. (e.i. `u32` for a 32 bit unsigned integer)
+- Functions should do one thing, and do it well.
+- `inline` functions should serve as a replacement for macro definitions, don't put things in here that you wouldn't put in a macro. (block ≤5 lines)
+- Mark all implementations in a `*.c` file with `static` if there isn't a matching definition in a `*.h` file. (unless there's a clear reason to)
+- When a function parameter takes in a pointer, and does not modify the pointed at data, a const pointer should be used. (`const int *ptr`)
+- Try to limit yourself at ~112 columns, but generally avoid overly long lines.

docs/dev/styleref.md

@@ -11,16 +11,10 @@
 - linux / unix-like machine
 
 ### style guide
-- parameterless functions should have the `void` parameter.[^cstd]
-- symbols mustn't be prefixed with `_`; this is a C standard reserved symbol.[^cstd]
-- typedefs (or anything else for that matter) mustn't be suffixed with `_t`, this is reserved by POSIX.[^cstd]
-- functions should do one thing, and do that thing well.[^cstd]
-- K&R style braces/indentation[^wikiindent]
+- Code must be written correctly, read [Correct C](./correct-c.md) if more information is required.
+- K&R style braces/[indentation](https://en.wikipedia.org/wiki/Indentation_style)
 - typedefs are discouraged
 - snake_case is used for all user-defined symbols. Macros are often all-uppercase, same goes for enums and other types of compile-time constants.
 - tabs are used for indentation, spaces are used for alignment.
 - British spelling is preferred, but not enforced. What is enforced is that British variants of the symbols are available.
 - commits should attempt to convey clearly what is being changed, for the sanity of the maintainer(s).
-
-[cstd]: this is a general C practice, included since it is something commonly done incorrectly.
-[wikiindent]: <https://en.wikipedia.org/wiki/Indentation_style>