https://github.com/rexim/simpc-mode

Simple C mode for Emacs
https://github.com/rexim/simpc-mode

Last synced: 7 days ago
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Simple C mode for Emacs

• Host: GitHub
• URL: https://github.com/rexim/simpc-mode
• Owner: rexim
• License: mit
• Created: 2020-07-11T22:45:40.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-10-11T16:32:21.000Z (about 2 years ago)
• Last Synced: 2024-02-17T08:35:51.345Z (11 months ago)
• Language: Emacs Lisp
• Size: 22.5 KB
• Stars: 26
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Simple C mode for Emacs

Because whatever comes with Emacs is too slow.

This mode does not try to be as featureful as `c-mode`, `c++-mode`,

`cc-mode`, etc. Instead we are trying to implement a bare minimum

syntax highlighting and indentation to maintain high performance on

big files with long lines.

The goal is to be able to comfortably browse and modify the following files:

- [imgui](https://raw.githubusercontent.com/ocornut/imgui/fb7f6cab8c322731da336e553915e944bf386e62/imgui.h)

- [amalgamated sqlite3.c](https://raw.githubusercontent.com/IreneKnapp/direct-sqlite/a74cc50c735053c7c49c487a66e7756b524db883/cbits/sqlite3.c)

- ...

Right now the only way to work with these files in Emacs is to use

`text-mode`. Which is actually a good evidence that Emacs itself can

handles such files! It's `c-mode` (and others) that cannot.

## Quick Start

Right now the only way to use this mode is to

1. `C-x C-f simpc-mode.el RET`

2. `M-x eval-buffer RET`

3. `M-x simpc-mode RET`

## Indentation

Right now the mode supports only very simple indentations based on the

analysing the previous non-empty line and its surrounding curly

braces. Anything more complicated is outside of the scope of the

project.

It is recommended to use an external formatter such as

[indent](https://www.gnu.org/software/indent/),

[astyle](http://astyle.sourceforge.net/),

[clang-format](https://clang.llvm.org/docs/ClangFormat.html), etc.

Here is how I use [astyle](http://astyle.sourceforge.net/):

```emacs-lisp

(defun astyle-buffer ()

  (interactive)

  (let ((saved-line-number (line-number-at-pos)))

    (shell-command-on-region

     (point-min)

     (point-max)

     "astyle --style=kr"

     nil

     t)

    (goto-line saved-line-number)))

```

Then I bind `astyle-buffer` to some key combination and invoke it

periodically to reformat the whole current buffer.