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nocomments.py

#!/usr/bin/env python

import sys, re
from getopt import getopt

'''
Just too lazy figuring out egrep alone, so...

$ ./nocomment.py proc_line < md.c
proc_line (char *line, unsigned len, struct session_args *a) {
$ ./nocomment.py '.*proc_line' < md.c
proc_line (char *line, unsigned len, struct session_args *a) {
            int n = proc_line (nextproc, linelen, a);
            if (n < linelen) { // proc_line error
            int n = proc_line (nextproc, len, a);
                        int n = proc_line (nextproc, linelen, a);
$ /usr/bin/grep proc_line md.c
proc_line (char *line, unsigned len, struct session_args *a) {
    //_dumpnstr (line, len, "proc_line");
    //_dumpnstr ("\nproc\n", 6, "proc_line");
        //int n = proc_line (a->internal_buf, bufsz, a);
            int n = proc_line (nextproc, linelen, a);
            if (n < linelen) { // proc_line error
    // proc_line next time
            int n = proc_line (nextproc, len, a);
                        int n = proc_line (nextproc, linelen, a);
'''

opts, args = getopt(sys.argv[1:], 'n')

optn = filter (lambda t:t[0] == '-n', opts)
printlineno = len(optn) == 1

if len(args) > 0:
    p = re.compile(args[0])
else:
    p = re.compile('.*')

lineno = 0
for line in sys.stdin:
    lineno += 1
    #print lineno, line
    l = line.strip()
    if (not l.startswith ('//')) and p.match(line) is not None: 
        print lineno if printlineno else '', line,