1 /* $NetBSD: unvis.c,v 1.6 1997/10/20 02:38:00 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) 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[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; 45 #endif 46 __RCSID("$NetBSD: unvis.c,v 1.6 1997/10/20 02:38:00 lukem Exp $"); 47 #endif /* not lint */ 48 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <err.h> 52 #include <vis.h> 53 54 int main __P((int, char **)); 55 void process __P((FILE *fp, const char *filename)); 56 57 int 58 main(argc, argv) 59 int argc; 60 char *argv[]; 61 { 62 FILE *fp; 63 int ch; 64 65 while ((ch = getopt(argc, argv, "")) != -1) 66 switch((char)ch) { 67 case '?': 68 default: 69 (void) fprintf(stderr, "usage: unvis [file...]\n"); 70 exit(1); 71 } 72 argc -= optind; 73 argv += optind; 74 75 if (*argv) 76 while (*argv) { 77 if ((fp=fopen(*argv, "r")) != NULL) 78 process(fp, *argv); 79 else 80 warn("%s", *argv); 81 argv++; 82 } 83 else 84 process(stdin, "<stdin>"); 85 exit(0); 86 } 87 88 void 89 process(fp, filename) 90 FILE *fp; 91 const char *filename; 92 { 93 int offset = 0, c, ret; 94 int state = 0; 95 char outc; 96 97 while ((c = getc(fp)) != EOF) { 98 offset++; 99 again: 100 switch(ret = unvis(&outc, (char)c, &state, 0)) { 101 case UNVIS_VALID: 102 putchar(outc); 103 break; 104 case UNVIS_VALIDPUSH: 105 putchar(outc); 106 goto again; 107 case UNVIS_SYNBAD: 108 warnx("%s: offset: %d: can't decode", filename, offset); 109 state = 0; 110 break; 111 case 0: 112 case UNVIS_NOCHAR: 113 break; 114 default: 115 errx(1, "bad return value (%d), can't happen", ret); 116 /* NOTREACHED */ 117 } 118 } 119 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 120 putchar(outc); 121 } 122