projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 11176d9b | 1 | /*- |
| 0836b5cf KB |
2 | * Copyright (c) 1989, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| ecb16b9f | 4 | * |
| 11176d9b | 5 | * %sccs.include.redist.c% |
| ecb16b9f MT |
6 | */ |
| 7 | ||
| 8 | #ifndef lint | |
| 0836b5cf KB |
9 | static char copyright[] = |
| 10 | "@(#) Copyright (c) 1989, 1993\n\ | |
| 11 | The Regents of the University of California. All rights reserved.\n"; | |
| ecb16b9f MT |
12 | #endif /* not lint */ |
| 13 | ||
| 14 | #ifndef lint | |
| 0836b5cf | 15 | static char sccsid[] = "@(#)unvis.c 8.1 (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 | } |