1 /*- 2 * Copyright (c) 1980 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1980 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)unexpand.c 5.3 (Berkeley) 4/18/91";*/ 42 static char rcsid[] = "$Id: unexpand.c,v 1.2 1993/08/01 18:04:04 mycroft Exp $"; 43 #endif /* not lint */ 44 45 /* 46 * unexpand - put tabs into a file replacing blanks 47 */ 48 #include <stdio.h> 49 50 char genbuf[BUFSIZ]; 51 char linebuf[BUFSIZ]; 52 int all; 53 54 main(argc, argv) 55 int argc; 56 char *argv[]; 57 { 58 register char *cp; 59 60 argc--, argv++; 61 if (argc > 0 && argv[0][0] == '-') { 62 if (strcmp(argv[0], "-a") != 0) { 63 fprintf(stderr, "usage: unexpand [ -a ] file ...\n"); 64 exit(1); 65 } 66 all++; 67 argc--, argv++; 68 } 69 do { 70 if (argc > 0) { 71 if (freopen(argv[0], "r", stdin) == NULL) { 72 perror(argv[0]); 73 exit(1); 74 } 75 argc--, argv++; 76 } 77 while (fgets(genbuf, BUFSIZ, stdin) != NULL) { 78 for (cp = linebuf; *cp; cp++) 79 continue; 80 if (cp > linebuf) 81 cp[-1] = 0; 82 tabify(all); 83 printf("%s", linebuf); 84 } 85 } while (argc > 0); 86 exit(0); 87 } 88 89 tabify(c) 90 char c; 91 { 92 register char *cp, *dp; 93 register int dcol; 94 int ocol; 95 96 ocol = 0; 97 dcol = 0; 98 cp = genbuf, dp = linebuf; 99 for (;;) { 100 switch (*cp) { 101 102 case ' ': 103 dcol++; 104 break; 105 106 case '\t': 107 dcol += 8; 108 dcol &= ~07; 109 break; 110 111 default: 112 while (((ocol + 8) &~ 07) <= dcol) { 113 if (ocol + 1 == dcol) 114 break; 115 *dp++ = '\t'; 116 ocol += 8; 117 ocol &= ~07; 118 } 119 while (ocol < dcol) { 120 *dp++ = ' '; 121 ocol++; 122 } 123 if (*cp == 0 || c == 0) { 124 strcpy(dp, cp); 125 return; 126 } 127 *dp++ = *cp; 128 ocol++, dcol++; 129 } 130 cp++; 131 } 132 } 133