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1.5 ! millert 1: /* $OpenBSD: unexpand.c,v 1.4 2001/11/19 19:02:17 mpech Exp $ */
1.1 deraadt 2: /* $NetBSD: unexpand.c,v 1.5 1994/12/24 17:08:05 cgd Exp $ */
3:
4: /*-
5: * Copyright (c) 1980, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1980, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93";
46: #endif
1.5 ! millert 47: static char rcsid[] = "$OpenBSD: unexpand.c,v 1.4 2001/11/19 19:02:17 mpech Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: /*
51: * unexpand - put tabs into a file replacing blanks
52: */
53: #include <stdio.h>
54: #include <string.h>
55:
56: char genbuf[BUFSIZ];
57: char linebuf[BUFSIZ];
58: int all;
59:
1.5 ! millert 60: void tabify(char);
1.1 deraadt 61:
62: int
63: main(argc, argv)
64: int argc;
65: char *argv[];
66: {
1.4 mpech 67: char *cp;
1.1 deraadt 68:
69: argc--, argv++;
70: if (argc > 0 && argv[0][0] == '-') {
71: if (strcmp(argv[0], "-a") != 0) {
1.3 deraadt 72: fprintf(stderr, "usage: unexpand [-a] [file ...]\n");
1.1 deraadt 73: exit(1);
74: }
75: all++;
76: argc--, argv++;
77: }
78: do {
79: if (argc > 0) {
80: if (freopen(argv[0], "r", stdin) == NULL) {
81: perror(argv[0]);
82: exit(1);
83: }
84: argc--, argv++;
85: }
86: while (fgets(genbuf, BUFSIZ, stdin) != NULL) {
87: for (cp = linebuf; *cp; cp++)
88: continue;
89: if (cp > linebuf)
90: cp[-1] = 0;
91: tabify(all);
92: printf("%s", linebuf);
93: }
94: } while (argc > 0);
95: exit(0);
96: }
97:
98: void
99: tabify(c)
100: char c;
101: {
1.4 mpech 102: char *cp, *dp;
103: int dcol;
1.1 deraadt 104: int ocol;
105:
106: ocol = 0;
107: dcol = 0;
108: cp = genbuf, dp = linebuf;
109: for (;;) {
110: switch (*cp) {
111:
112: case ' ':
113: dcol++;
114: break;
115:
116: case '\t':
117: dcol += 8;
118: dcol &= ~07;
119: break;
120:
121: default:
122: while (((ocol + 8) &~ 07) <= dcol) {
123: if (ocol + 1 == dcol)
124: break;
125: *dp++ = '\t';
126: ocol += 8;
127: ocol &= ~07;
128: }
129: while (ocol < dcol) {
130: *dp++ = ' ';
131: ocol++;
132: }
133: if (*cp == 0 || c == 0) {
134: strcpy(dp, cp);
135: return;
136: }
137: *dp++ = *cp;
138: ocol++, dcol++;
139: }
140: cp++;
141: }
142: }