1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. 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 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 /* 45 * unexpand - put tabs into a file replacing blanks 46 */ 47 #include <stdio.h> 48 49 char genbuf[BUFSIZ]; 50 char linebuf[BUFSIZ]; 51 int all; 52 53 main(argc, argv) 54 int argc; 55 char *argv[]; 56 { 57 register char *cp; 58 59 argc--, argv++; 60 if (argc > 0 && argv[0][0] == '-') { 61 if (strcmp(argv[0], "-a") != 0) { 62 fprintf(stderr, "usage: unexpand [ -a ] file ...\n"); 63 exit(1); 64 } 65 all++; 66 argc--, argv++; 67 } 68 do { 69 if (argc > 0) { 70 if (freopen(argv[0], "r", stdin) == NULL) { 71 perror(argv[0]); 72 exit(1); 73 } 74 argc--, argv++; 75 } 76 while (fgets(genbuf, BUFSIZ, stdin) != NULL) { 77 for (cp = linebuf; *cp; cp++) 78 continue; 79 if (cp > linebuf) 80 cp[-1] = 0; 81 tabify(all); 82 printf("%s", linebuf); 83 } 84 } while (argc > 0); 85 exit(0); 86 } 87 88 tabify(c) 89 char c; 90 { 91 register char *cp, *dp; 92 register int dcol; 93 int ocol; 94 95 ocol = 0; 96 dcol = 0; 97 cp = genbuf, dp = linebuf; 98 for (;;) { 99 switch (*cp) { 100 101 case ' ': 102 dcol++; 103 break; 104 105 case '\t': 106 dcol += 8; 107 dcol &= ~07; 108 break; 109 110 default: 111 while (((ocol + 8) &~ 07) <= dcol) { 112 if (ocol + 1 == dcol) 113 break; 114 *dp++ = '\t'; 115 ocol += 8; 116 ocol &= ~07; 117 } 118 while (ocol < dcol) { 119 *dp++ = ' '; 120 ocol++; 121 } 122 if (*cp == 0 || c == 0) { 123 strcpy(dp, cp); 124 return; 125 } 126 *dp++ = *cp; 127 ocol++, dcol++; 128 } 129 cp++; 130 } 131 } 132