text: /*
   * Copyright (c) 1980, 1987, 1991, 1993
   *	The Regents of the University of California.  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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
   */
  
  #ifndef lint
  static const char copyright[] =
  "@(#) Copyright (c) 1980, 1987, 1991, 1993\n\
  	The Regents of the University of California.  All rights reserved.\n";
  #endif /* not lint */
  
  #if 0
  #ifndef lint
  static char sccsid[] = "@(#)wc.c	8.1 (Berkeley) 6/6/93";
  #endif /* not lint */
  #endif
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: src/usr.bin/wc/wc.c,v 1.21 2004/12/27 22:27:56 josef Exp $");
  
  #include <sys/param.h>
  #include <sys/stat.h>
  
  #include <ctype.h>
  #include <err.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <locale.h>
  #include <stdint.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  #include <wchar.h>
  #include <wctype.h>
  
  uintmax_t tlinect, twordct, tcharct;
  int doline, doword, dochar, domulti;
  
  static int	cnt(const char *);
  static void	usage(void);
  
  int
  main(int argc, char *argv[])
  {
  	int ch, errors, total;
  
  	(void) setlocale(LC_CTYPE, "");
  
  	while ((ch = getopt(argc, argv, "clmw")) != -1)
  		switch((char)ch) {
  		case 'l':
  			doline = 1;
  			break;
  		case 'w':
  			doword = 1;
  			break;
  		case 'c':
  			dochar = 1;
  			domulti = 0;
  			break;
  		case 'm':
  			domulti = 1;
  			dochar = 0;
  			break;
  		case '?':
  		default:
  			usage();
  		}
  	argv += optind;
  	argc -= optind;
  
  	/* Wc's flags are on by default. */
  	if (doline + doword + dochar + domulti == 0)
  		doline = doword = dochar = 1;
  
  	errors = 0;
  	total = 0;
  	if (!*argv) {
  		if (cnt((char *)NULL) != 0)
  			++errors;
  		else
  			(void)printf("\n");
  	}
  	else do {
  		if (cnt(*argv) != 0)
  			++errors;
  		else
  			(void)printf(" %s\n", *argv);
  		++total;
  	} while(*++argv);
  
  	if (total > 1) {
  		if (doline)
  			(void)printf(" %7ju", tlinect);
  		if (doword)
  			(void)printf(" %7ju", twordct);
  		if (dochar || domulti)
  			(void)printf(" %7ju", tcharct);
  		(void)printf(" total\n");
  	}
  	exit(errors == 0 ? 0 : 1);
  }
  
  static int
  cnt(const char *file)
  {
  	struct stat sb;
  	uintmax_t linect, wordct, charct;
  	int fd, len, warned;
  	size_t clen;
  	short gotsp;
  	u_char *p;
  	u_char buf[MAXBSIZE];
  	wchar_t wch;
  	mbstate_t mbs;
  
  	linect = wordct = charct = 0;
  	if (file == NULL) {
  		file = "stdin";
  		fd = STDIN_FILENO;
  	} else {
  		if ((fd = open(file, O_RDONLY, 0)) < 0) {
  			warn("%s: open", file);
  			return (1);
  		}
  		if (doword || (domulti && MB_CUR_MAX != 1))
  			goto word;
  		/*
  		 * Line counting is split out because it's a lot faster to get
  		 * lines than to get words, since the word count requires some
  		 * logic.
  		 */
  		if (doline) {
  			while ((len = read(fd, buf, MAXBSIZE))) {
  				if (len == -1) {
  					warn("%s: read", file);
  					(void)close(fd);
  					return (1);
  				}
  				charct += len;
  				for (p = buf; len--; ++p)
  					if (*p == '\n')
  						++linect;
  			}
  			tlinect += linect;
  			(void)printf(" %7ju", linect);
  			if (dochar) {
  				tcharct += charct;
  				(void)printf(" %7ju", charct);
  			}
  			(void)close(fd);
  			return (0);
  		}
  		/*
  		 * If all we need is the number of characters and it's a
  		 * regular file, just stat the puppy.
  		 */
  		if (dochar || domulti) {
  			if (fstat(fd, &sb)) {
  				warn("%s: fstat", file);
  				(void)close(fd);
  				return (1);
  			}
  			if (S_ISREG(sb.st_mode)) {
  				(void)printf(" %7lld", (long long)sb.st_size);
  				tcharct += sb.st_size;
  				(void)close(fd);
  				return (0);
  			}
  		}
  	}
  
  	/* Do it the hard way... */
  word:	gotsp = 1;
  	warned = 0;
  	memset(&mbs, 0, sizeof(mbs));
  	while ((len = read(fd, buf, MAXBSIZE)) != 0) {
  		if (len == -1) {
  			warn("%s: read", file);
  			(void)close(fd);
  			return (1);
  		}
  		p = buf;
  		while (len > 0) {
  			if (!domulti || MB_CUR_MAX == 1) {
  				clen = 1;
  				wch = (unsigned char)*p;
  			} else if ((clen = mbrtowc(&wch, p, len, &mbs)) ==
  			    (size_t)-1) {
  				if (!warned) {
  					errno = EILSEQ;
  					warn("%s", file);
  					warned = 1;
  				}
  				memset(&mbs, 0, sizeof(mbs));
  				clen = 1;
  				wch = (unsigned char)*p;
  			} else if (clen == (size_t)-2)
  				break;
  			else if (clen == 0)
  				clen = 1;
  			charct++;
  			len -= clen;
  			p += clen;
  			if (wch == L'\n')
  				++linect;
  			if (iswspace(wch))
  				gotsp = 1;
  			else if (gotsp) {
  				gotsp = 0;
  				++wordct;
  			}
  		}
  	}
  	if (domulti && MB_CUR_MAX > 1)
  		if (mbrtowc(NULL, NULL, 0, &mbs) == (size_t)-1 && !warned)
  			warn("%s", file);
  	if (doline) {
  		tlinect += linect;
  		(void)printf(" %7ju", linect);
  	}
  	if (doword) {
  		twordct += wordct;
  		(void)printf(" %7ju", wordct);
  	}
  	if (dochar || domulti) {
  		tcharct += charct;
  		(void)printf(" %7ju", charct);
  	}
  	(void)close(fd);
  	return (0);
  }
  
  static void
  usage()
  {
  	(void)fprintf(stderr, "usage: wc [-clmw] [file ...]\n");
  	exit(1);
  }
  