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1.1 deraadt 1: /* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $ */
2:
3: /*-
4: * Copyright (c) 1989, 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: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1989, 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[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
45: #endif
46: static char rcsid[] = "$NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $";
47: #endif /* not lint */
48:
49: #include <stdio.h>
50: #include <string.h>
51: #include <stdlib.h>
52: #include <unistd.h>
53: #include <err.h>
54: #include <vis.h>
55:
56: int eflags, fold, foldwidth=80, none, markeol, debug;
57:
58: int foldit __P((char *, int, int));
59: void process __P((FILE *, char *));
60:
61: int
62: main(argc, argv)
63: int argc;
64: char *argv[];
65: {
66: FILE *fp;
67: int ch;
68:
69: while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF)
70: switch((char)ch) {
71: case 'n':
72: none++;
73: break;
74: case 'w':
75: eflags |= VIS_WHITE;
76: break;
77: case 'c':
78: eflags |= VIS_CSTYLE;
79: break;
80: case 't':
81: eflags |= VIS_TAB;
82: break;
83: case 's':
84: eflags |= VIS_SAFE;
85: break;
86: case 'o':
87: eflags |= VIS_OCTAL;
88: break;
89: case 'b':
90: eflags |= VIS_NOSLASH;
91: break;
92: case 'F':
93: if ((foldwidth = atoi(optarg))<5) {
94: errx(1, "can't fold lines to less than 5 cols");
95: /* NOTREACHED */
96: }
97: /*FALLTHROUGH*/
98: case 'f':
99: fold++; /* fold output lines to 80 cols */
100: break; /* using hidden newline */
101: case 'l':
102: markeol++; /* mark end of line with \$ */
103: break;
104: #ifdef DEBUG
105: case 'd':
106: debug++;
107: break;
108: #endif
109: case '?':
110: default:
111: fprintf(stderr,
112: "usage: vis [-nwctsobf] [-F foldwidth]\n");
113: exit(1);
114: }
115: argc -= optind;
116: argv += optind;
117:
118: if (*argv)
119: while (*argv) {
120: if ((fp=fopen(*argv, "r")) != NULL)
121: process(fp, *argv);
122: else
123: warn("%s", *argv);
124: argv++;
125: }
126: else
127: process(stdin, "<stdin>");
128: exit(0);
129: }
130:
131: void
132: process(fp, filename)
133: FILE *fp;
134: char *filename;
135: {
136: static int col = 0;
137: register char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */
138: register int c, rachar;
139: char buff[5];
140:
141: c = getc(fp);
142: while (c != EOF) {
143: rachar = getc(fp);
144: if (none) {
145: cp = buff;
146: *cp++ = c;
147: if (c == '\\')
148: *cp++ = '\\';
149: *cp = '\0';
150: } else if (markeol && c == '\n') {
151: cp = buff;
152: if ((eflags & VIS_NOSLASH) == 0)
153: *cp++ = '\\';
154: *cp++ = '$';
155: *cp++ = '\n';
156: *cp = '\0';
157: } else
158: (void) vis(buff, (char)c, eflags, (char)rachar);
159:
160: cp = buff;
161: if (fold) {
162: #ifdef DEBUG
163: if (debug)
164: printf("<%02d,", col);
165: #endif
166: col = foldit(cp, col, foldwidth);
167: #ifdef DEBUG
168: if (debug)
169: printf("%02d>", col);
170: #endif
171: }
172: do {
173: putchar(*cp);
174: } while (*++cp);
175: c = rachar;
176: }
177: /*
178: * terminate partial line with a hidden newline
179: */
180: if (fold && *(cp-1) != '\n')
181: printf("\\\n");
182: }