1 /* $NetBSD: unexpand.c,v 1.8 1999/02/11 15:29:14 kleink Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93"; 45 #endif 46 __RCSID("$NetBSD: unexpand.c,v 1.8 1999/02/11 15:29:14 kleink Exp $"); 47 #endif /* not lint */ 48 49 /* 50 * unexpand - put tabs into a file replacing blanks 51 */ 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 char genbuf[BUFSIZ]; 58 char linebuf[BUFSIZ]; 59 60 int main __P((int, char **)); 61 void tabify __P((int)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char *argv[]; 67 { 68 int all, c; 69 char *cp; 70 71 all = 0; 72 while ((c = getopt(argc, argv, "a")) != -1) { 73 switch (c) { 74 case 'a': 75 all++; 76 break; 77 case '?': 78 default: 79 fprintf(stderr, "usage: unexpand [-a] [file ...]\n"); 80 exit(EXIT_FAILURE); 81 /* NOTREACHED */ 82 } 83 } 84 argc -= optind; 85 argv += optind; 86 87 do { 88 if (argc > 0) { 89 if (freopen(argv[0], "r", stdin) == NULL) { 90 perror(argv[0]); 91 exit(EXIT_FAILURE); 92 } 93 argc--, argv++; 94 } 95 while (fgets(genbuf, BUFSIZ, stdin) != NULL) { 96 for (cp = linebuf; *cp; cp++) 97 continue; 98 if (cp > linebuf) 99 cp[-1] = 0; 100 tabify(all); 101 printf("%s", linebuf); 102 } 103 } while (argc > 0); 104 exit(EXIT_SUCCESS); 105 /* NOTREACHED */ 106 } 107 108 void 109 tabify(c) 110 int c; 111 { 112 char *cp, *dp; 113 int dcol; 114 int ocol; 115 116 ocol = 0; 117 dcol = 0; 118 cp = genbuf, dp = linebuf; 119 for (;;) { 120 switch (*cp) { 121 122 case ' ': 123 dcol++; 124 break; 125 126 case '\t': 127 dcol += 8; 128 dcol &= ~07; 129 break; 130 131 default: 132 while (((ocol + 8) &~ 07) <= dcol) { 133 if (ocol + 1 == dcol) 134 break; 135 *dp++ = '\t'; 136 ocol += 8; 137 ocol &= ~07; 138 } 139 while (ocol < dcol) { 140 *dp++ = ' '; 141 ocol++; 142 } 143 if (*cp == 0 || c == 0) { 144 strcpy(dp, cp); 145 return; 146 } 147 *dp++ = *cp; 148 ocol++, dcol++; 149 } 150 cp++; 151 } 152 } 153