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1.5 ! millert 1: /* $OpenBSD: vis.c,v 1.4 2001/11/19 19:02:17 mpech Exp $ */
1.1 deraadt 2: /* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $ */
3:
4: /*-
5: * Copyright (c) 1989, 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) 1989, 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[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
46: #endif
1.5 ! millert 47: static char rcsid[] = "$OpenBSD: vis.c,v 1.4 2001/11/19 19:02:17 mpech Exp $";
1.1 deraadt 48: #endif /* not lint */
49:
50: #include <stdio.h>
51: #include <string.h>
52: #include <stdlib.h>
53: #include <unistd.h>
54: #include <err.h>
55: #include <vis.h>
56:
57: int eflags, fold, foldwidth=80, none, markeol, debug;
58:
1.5 ! millert 59: int foldit(char *, int, int);
! 60: void process(FILE *, char *);
1.1 deraadt 61:
62: int
63: main(argc, argv)
64: int argc;
65: char *argv[];
66: {
67: FILE *fp;
68: int ch;
69:
1.3 millert 70: while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != -1)
1.1 deraadt 71: switch((char)ch) {
72: case 'n':
73: none++;
74: break;
75: case 'w':
76: eflags |= VIS_WHITE;
77: break;
78: case 'c':
79: eflags |= VIS_CSTYLE;
80: break;
81: case 't':
82: eflags |= VIS_TAB;
83: break;
84: case 's':
85: eflags |= VIS_SAFE;
86: break;
87: case 'o':
88: eflags |= VIS_OCTAL;
89: break;
90: case 'b':
91: eflags |= VIS_NOSLASH;
92: break;
93: case 'F':
94: if ((foldwidth = atoi(optarg))<5) {
95: errx(1, "can't fold lines to less than 5 cols");
96: /* NOTREACHED */
97: }
98: /*FALLTHROUGH*/
99: case 'f':
100: fold++; /* fold output lines to 80 cols */
101: break; /* using hidden newline */
102: case 'l':
103: markeol++; /* mark end of line with \$ */
104: break;
105: #ifdef DEBUG
106: case 'd':
107: debug++;
108: break;
109: #endif
110: case '?':
111: default:
112: fprintf(stderr,
113: "usage: vis [-nwctsobf] [-F foldwidth]\n");
114: exit(1);
115: }
116: argc -= optind;
117: argv += optind;
118:
119: if (*argv)
120: while (*argv) {
121: if ((fp=fopen(*argv, "r")) != NULL)
122: process(fp, *argv);
123: else
124: warn("%s", *argv);
125: argv++;
126: }
127: else
128: process(stdin, "<stdin>");
129: exit(0);
130: }
131:
132: void
133: process(fp, filename)
134: FILE *fp;
135: char *filename;
136: {
137: static int col = 0;
1.4 mpech 138: char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */
139: int c, rachar;
1.1 deraadt 140: char buff[5];
141:
142: c = getc(fp);
143: while (c != EOF) {
144: rachar = getc(fp);
145: if (none) {
146: cp = buff;
147: *cp++ = c;
148: if (c == '\\')
149: *cp++ = '\\';
150: *cp = '\0';
151: } else if (markeol && c == '\n') {
152: cp = buff;
153: if ((eflags & VIS_NOSLASH) == 0)
154: *cp++ = '\\';
155: *cp++ = '$';
156: *cp++ = '\n';
157: *cp = '\0';
158: } else
159: (void) vis(buff, (char)c, eflags, (char)rachar);
160:
161: cp = buff;
162: if (fold) {
163: #ifdef DEBUG
164: if (debug)
165: printf("<%02d,", col);
166: #endif
167: col = foldit(cp, col, foldwidth);
168: #ifdef DEBUG
169: if (debug)
170: printf("%02d>", col);
171: #endif
172: }
173: do {
174: putchar(*cp);
175: } while (*++cp);
176: c = rachar;
177: }
178: /*
179: * terminate partial line with a hidden newline
180: */
181: if (fold && *(cp-1) != '\n')
182: printf("\\\n");
183: }