If you read the source code of C language or develop in it, you may do formatting the code by your favorite indent style.
I like K&R indent style, and 4 spaces as a indent, personally.
For this purpose, the tool "GNU indent" is useful.
In this case, I will install it on Mac.
Take note the following default installed indent is not GNU indent.
I do not use this.
$ which indent /usr/bin/indent
Install
$ brew install gnu-indent
How to use
Options:
- -kr: K&R style.
- -nut: No tabs. Use spaces instead of tabs. This option is for indent: 4 spaces.
Argument files are converted by specified indent style.
$ gindent -kr -nut {c or header file}
If you want to use this for all the .c or .h files, type as following.
$ find . -name "*.c" -o -name "*.h" | xargs gindent -kr -nut
It is useful to use this in Makefile.
$ vi Makefile
...
format:
find . -name "*.c" -o -name "*.h" | xargs gindent -kr -nut
.PHONY : format
...
That's all.
