/*-
 * Copyright (c) 2000 Chris Costello <chris@FreeBSD.org>
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

void		 usage(void);
char		*find_comment(char *);

void
usage(void)
{
	fprintf(stderr, "Usage: comments [file ...]\n");
	exit(EXIT_FAILURE);
}

char *
find_comment(char *s)
{
	int constant = 0;

	for (; *s != '\n'; ++s) {
		if (*s == '"')
			constant = !constant;
		if (!constant && *s == '/' && s[1] == '*')
			return (s);
	}
	return (NULL);
}

int
main(int argc, char **argv)
{
	char linebuf[_POSIX2_LINE_MAX];
	char *cp, *ep;
	int comment;

	if (argc < 2)
		usage();

	for (--argc, ++argv; argc != 0; --argc, ++argv) {
		if (strcmp(*argv, "-") == 0)
			*argv = "/dev/stdin";
		if (freopen(*argv, "r", stdin) == NULL) {
			perror(*argv);
			continue;
		}

		comment = 0;
		while (fgets(linebuf, sizeof linebuf, stdin) != NULL) {
			if (!comment) {
				cp = find_comment(linebuf);
				if (cp != NULL) {
					comment = 1;
					cp += 2;
					if (*cp == '-')
						cp++;
					cp += strspn(cp, "\t ");
					if ((ep = strstr(cp, "*/")) != NULL) {
						*ep = '\n';
						*++ep = '\0';
						comment = 0;
					}
					if (*cp == '\n')
						continue;
					fputs(cp, stdout);
				}
			} else {
				cp = strstr(linebuf, "*/");
				if (cp != NULL) {
					*cp = '\0';
					comment = 0;
				}
				cp = linebuf + strspn(linebuf, "\t ");
				if (*cp == '*') {
					++cp;
					cp += strspn(cp, "\t ");
				}
				fputs(cp, stdout);
			}
		}
	}
	return 0;
}