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49b4d532 WJ |
1 | /*- |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * 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 | char copyright[] = | |
36 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)unvis.c 5.1 (Berkeley) 6/1/90"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | #include <stdio.h> | |
45 | #include <vis.h> | |
46 | ||
47 | char *Program; | |
48 | #define usage() fprintf(stderr, "usage: %s %s\n", Program, USAGE) | |
49 | #define USAGE "[file...]" | |
50 | ||
51 | main(argc, argv) | |
52 | char *argv[]; | |
53 | { | |
54 | FILE *fp; | |
55 | extern char *optarg; | |
56 | extern int optind; | |
57 | int ch; | |
58 | ||
59 | Program = argv[0]; | |
60 | while ((ch = getopt(argc, argv, "")) != EOF) | |
61 | switch((char)ch) { | |
62 | case '?': | |
63 | default: | |
64 | usage(); | |
65 | exit(1); | |
66 | } | |
67 | argc -= optind; | |
68 | argv += optind; | |
69 | ||
70 | if (*argv) | |
71 | while (*argv) { | |
72 | if ((fp=fopen(*argv, "r")) != NULL) | |
73 | process(fp, *argv); | |
74 | else | |
75 | syserror("%s", *argv); | |
76 | argv++; | |
77 | } | |
78 | else | |
79 | process(stdin, "<stdin>"); | |
80 | exit(0); | |
81 | } | |
82 | ||
83 | process(fp, filename) | |
84 | FILE *fp; | |
85 | char *filename; | |
86 | { | |
87 | register int offset = 0, c, ret; | |
88 | int state = 0; | |
89 | char outc; | |
90 | ||
91 | while ((c = getc(fp)) != EOF) { | |
92 | offset++; | |
93 | again: | |
94 | switch(ret = unvis(&outc, (char)c, &state, 0)) { | |
95 | case UNVIS_VALID: | |
96 | putchar(outc); | |
97 | break; | |
98 | case UNVIS_VALIDPUSH: | |
99 | putchar(outc); | |
100 | goto again; | |
101 | case UNVIS_SYNBAD: | |
102 | error("%s: offset: %d: can't decode", filename, offset); | |
103 | state = 0; | |
104 | break; | |
105 | case 0: | |
106 | case UNVIS_NOCHAR: | |
107 | break; | |
108 | default: | |
109 | error("bad return value (%d), can't happen", ret); | |
110 | exit(1); | |
111 | } | |
112 | } | |
113 | if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) | |
114 | putchar(outc); | |
115 | } | |
116 | ||
117 | #include <varargs.h> | |
118 | ||
119 | error(va_alist) | |
120 | va_dcl | |
121 | { | |
122 | char *fmt; | |
123 | va_list ap; | |
124 | extern errno; | |
125 | ||
126 | fprintf(stderr, "%s: ", Program); | |
127 | va_start(ap); | |
128 | fmt = va_arg(ap, char *); | |
129 | (void) vfprintf(stderr, fmt, ap); | |
130 | va_end(ap); | |
131 | fprintf(stderr, "\n"); | |
132 | } | |
133 | ||
134 | syserror(va_alist) | |
135 | va_dcl | |
136 | { | |
137 | char *fmt; | |
138 | va_list ap; | |
139 | extern errno; | |
140 | ||
141 | fprintf(stderr, "%s: ", Program); | |
142 | va_start(ap); | |
143 | fmt = va_arg(ap, char *); | |
144 | (void) vfprintf(stderr, fmt, ap); | |
145 | va_end(ap); | |
146 | fprintf(stderr, ": %s\n", strerror(errno)); | |
147 | } |