Commit | Line | Data |
---|---|---|
11176d9b | 1 | /*- |
ecb16b9f MT |
2 | * Copyright (c) 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
11176d9b | 5 | * %sccs.include.redist.c% |
ecb16b9f MT |
6 | */ |
7 | ||
8 | #ifndef lint | |
9 | char copyright[] = | |
10 | "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ | |
11 | All rights reserved.\n"; | |
12 | #endif /* not lint */ | |
13 | ||
14 | #ifndef lint | |
11176d9b | 15 | static char sccsid[] = "@(#)unvis.c 5.1 (Berkeley) %G%"; |
ecb16b9f MT |
16 | #endif /* not lint */ |
17 | ||
18 | #include <stdio.h> | |
19 | #include <vis.h> | |
20 | ||
21 | char *Program; | |
22 | #define usage() fprintf(stderr, "usage: %s %s\n", Program, USAGE) | |
23 | #define USAGE "[file...]" | |
24 | ||
25 | main(argc, argv) | |
26 | char *argv[]; | |
27 | { | |
28 | FILE *fp; | |
29 | extern char *optarg; | |
30 | extern int optind; | |
31 | int ch; | |
32 | ||
33 | Program = argv[0]; | |
34 | while ((ch = getopt(argc, argv, "")) != EOF) | |
35 | switch((char)ch) { | |
36 | case '?': | |
37 | default: | |
38 | usage(); | |
39 | exit(1); | |
40 | } | |
41 | argc -= optind; | |
42 | argv += optind; | |
43 | ||
44 | if (*argv) | |
45 | while (*argv) { | |
46 | if ((fp=fopen(*argv, "r")) != NULL) | |
47 | process(fp, *argv); | |
48 | else | |
49 | syserror("%s", *argv); | |
50 | argv++; | |
51 | } | |
52 | else | |
53 | process(stdin, "<stdin>"); | |
54 | exit(0); | |
55 | } | |
56 | ||
57 | process(fp, filename) | |
58 | FILE *fp; | |
59 | char *filename; | |
60 | { | |
61 | register int offset = 0, c, ret; | |
62 | int state = 0; | |
63 | char outc; | |
64 | ||
65 | while ((c = getc(fp)) != EOF) { | |
66 | offset++; | |
67 | again: | |
68 | switch(ret = unvis(&outc, (char)c, &state, 0)) { | |
69 | case UNVIS_VALID: | |
70 | putchar(outc); | |
71 | break; | |
72 | case UNVIS_VALIDPUSH: | |
73 | putchar(outc); | |
74 | goto again; | |
75 | case UNVIS_SYNBAD: | |
76 | error("%s: offset: %d: can't decode", filename, offset); | |
77 | state = 0; | |
78 | break; | |
79 | case 0: | |
80 | case UNVIS_NOCHAR: | |
81 | break; | |
82 | default: | |
83 | error("bad return value (%d), can't happen", ret); | |
84 | exit(1); | |
85 | } | |
86 | } | |
87 | if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) | |
88 | putchar(outc); | |
89 | } | |
90 | ||
91 | #include <varargs.h> | |
92 | ||
93 | error(va_alist) | |
94 | va_dcl | |
95 | { | |
96 | char *fmt; | |
97 | va_list ap; | |
98 | extern errno; | |
99 | ||
100 | fprintf(stderr, "%s: ", Program); | |
101 | va_start(ap); | |
102 | fmt = va_arg(ap, char *); | |
103 | (void) vfprintf(stderr, fmt, ap); | |
104 | va_end(ap); | |
105 | fprintf(stderr, "\n"); | |
106 | } | |
107 | ||
108 | syserror(va_alist) | |
109 | va_dcl | |
110 | { | |
111 | char *fmt; | |
112 | va_list ap; | |
113 | extern errno; | |
114 | ||
115 | fprintf(stderr, "%s: ", Program); | |
116 | va_start(ap); | |
117 | fmt = va_arg(ap, char *); | |
118 | (void) vfprintf(stderr, fmt, ap); | |
119 | va_end(ap); | |
120 | fprintf(stderr, ": %s\n", strerror(errno)); | |
121 | } |