This is an Awk script that I wrote to compute C code metrics. It looks at code and comments via regular expressions and computes

• Lines of code (non-blank)
• Number of comments (multiline and single-line accounted for)
• Raw lines of text
• Total code
• Total comments
• Comment percentage

The last is the most interesting. I'm a comment-zealot so mine tend to run about 24%.

It's old code, but works great and is really quite fast.

Run it like so: awk -f lc.awk *.c

I use a shell script called lc: ```

!/bin/sh

Script to call awk line-counting script

pfh 3/19/02

awk -f ${HOME}/bin/lc.awk $*%
```

Here's an example, the Linux kernel 2.2.16: ``` ----------File---Code---Comments---Raw Lines------------------------------------ sys.c 716 193 1025 panic.c 59 21 90 itimer.c 133 21 173 printk.c 365 101 487 ksyms.c 343 49 426 sched.c 1262 581 2081 kmod.c 101 56 187 exec_domain.c 92 20 128 resource.c 130 42 189 capability.c 142 40 216 fork.c 547 126 763 dma.c 66 39 128 module.c 767 118 1020 info.c 22 6 38 softirq.c 36 26 70 signal.c 776 177 1099 acct.c 201 133 363 time.c 238 166 423 sysctl.c 997 115 1190

exit.c 394 95 540

Total code: 7387 Total comments: 2125 Total raw lines: 10636 Comment percentage: 22.340202 ```

I had this project self-hosted at http://www.phfactor.net/code/line-counting/ but this is the new home.