unexpand.c revision 78717
11590Srgrimes/*- 21590Srgrimes * Copyright (c) 1980, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 3528456Scharnierstatic const char copyright[] = 361590Srgrimes"@(#) Copyright (c) 1980, 1993\n\ 371590Srgrimes The Regents of the University of California. All rights reserved.\n"; 381590Srgrimes#endif /* not lint */ 391590Srgrimes 401590Srgrimes#ifndef lint 4128456Scharnier#if 0 421590Srgrimesstatic char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93"; 4328456Scharnier#endif 4428456Scharnierstatic const char rcsid[] = 4550477Speter "$FreeBSD: head/usr.bin/unexpand/unexpand.c 78717 2001-06-24 19:41:18Z dd $"; 461590Srgrimes#endif /* not lint */ 471590Srgrimes 481590Srgrimes/* 491590Srgrimes * unexpand - put tabs into a file replacing blanks 501590Srgrimes */ 5128456Scharnier#include <err.h> 521590Srgrimes#include <stdio.h> 5378717Sdd#include <stdlib.h> 5433645Sjb#include <string.h> 551590Srgrimes 561590Srgrimeschar genbuf[BUFSIZ]; 571590Srgrimeschar linebuf[BUFSIZ]; 581590Srgrimesint all; 591590Srgrimes 6028456Scharnierstatic void usage __P((void)); 6128456Scharniervoid tabify __P((char)); 6228456Scharnier 6328789Scharnierint 641590Srgrimesmain(argc, argv) 651590Srgrimes int argc; 661590Srgrimes char *argv[]; 671590Srgrimes{ 681590Srgrimes register char *cp; 691590Srgrimes 701590Srgrimes argc--, argv++; 711590Srgrimes if (argc > 0 && argv[0][0] == '-') { 7228456Scharnier if (strcmp(argv[0], "-a") != 0) 7328456Scharnier usage(); 741590Srgrimes all++; 751590Srgrimes argc--, argv++; 761590Srgrimes } 771590Srgrimes do { 781590Srgrimes if (argc > 0) { 7928456Scharnier if (freopen(argv[0], "r", stdin) == NULL) 8028456Scharnier err(1, "%s", argv[0]); 811590Srgrimes argc--, argv++; 821590Srgrimes } 831590Srgrimes while (fgets(genbuf, BUFSIZ, stdin) != NULL) { 841590Srgrimes for (cp = linebuf; *cp; cp++) 851590Srgrimes continue; 861590Srgrimes if (cp > linebuf) 871590Srgrimes cp[-1] = 0; 881590Srgrimes tabify(all); 891590Srgrimes printf("%s", linebuf); 901590Srgrimes } 911590Srgrimes } while (argc > 0); 921590Srgrimes exit(0); 931590Srgrimes} 941590Srgrimes 9528456Scharnierstatic void 9628456Scharnierusage() 9728456Scharnier{ 9828456Scharnier fprintf(stderr, "usage: unexpand [-a] file ...\n"); 9928456Scharnier exit(1); 10028456Scharnier} 10128456Scharnier 10228456Scharniervoid 1031590Srgrimestabify(c) 1041590Srgrimes char c; 1051590Srgrimes{ 1061590Srgrimes register char *cp, *dp; 1071590Srgrimes register int dcol; 1081590Srgrimes int ocol; 1091590Srgrimes 1101590Srgrimes ocol = 0; 1111590Srgrimes dcol = 0; 1121590Srgrimes cp = genbuf, dp = linebuf; 1131590Srgrimes for (;;) { 1141590Srgrimes switch (*cp) { 1151590Srgrimes 1161590Srgrimes case ' ': 1171590Srgrimes dcol++; 1181590Srgrimes break; 1191590Srgrimes 1201590Srgrimes case '\t': 1211590Srgrimes dcol += 8; 1221590Srgrimes dcol &= ~07; 1231590Srgrimes break; 1241590Srgrimes 1251590Srgrimes default: 1261590Srgrimes while (((ocol + 8) &~ 07) <= dcol) { 1271590Srgrimes if (ocol + 1 == dcol) 1281590Srgrimes break; 1291590Srgrimes *dp++ = '\t'; 1301590Srgrimes ocol += 8; 1311590Srgrimes ocol &= ~07; 1321590Srgrimes } 1331590Srgrimes while (ocol < dcol) { 1341590Srgrimes *dp++ = ' '; 1351590Srgrimes ocol++; 1361590Srgrimes } 1371590Srgrimes if (*cp == 0 || c == 0) { 1381590Srgrimes strcpy(dp, cp); 1391590Srgrimes return; 1401590Srgrimes } 1411590Srgrimes *dp++ = *cp; 1421590Srgrimes ocol++, dcol++; 1431590Srgrimes } 1441590Srgrimes cp++; 1451590Srgrimes } 1461590Srgrimes} 147