1 /* $OpenBSD: unvis.c,v 1.8 2008/07/06 13:49:35 sobrado 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static char copyright[] = 34 "@(#) Copyright (c) 1989, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 static char rcsid[] = "$OpenBSD: unvis.c,v 1.8 2008/07/06 13:49:35 sobrado Exp $"; 43 #endif /* not lint */ 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <err.h> 48 #include <vis.h> 49 50 void process(FILE *fp, const char *filename); 51 52 int 53 main(int argc, char *argv[]) 54 { 55 FILE *fp; 56 int ch; 57 58 while ((ch = getopt(argc, argv, "")) != -1) 59 switch((char)ch) { 60 case '?': 61 default: 62 (void) fprintf(stderr, "usage: unvis [file ...]\n"); 63 exit(1); 64 } 65 argc -= optind; 66 argv += optind; 67 68 if (*argv) 69 while (*argv) { 70 if ((fp=fopen(*argv, "r")) != NULL) 71 process(fp, *argv); 72 else 73 warn("%s", *argv); 74 argv++; 75 } 76 else 77 process(stdin, "<stdin>"); 78 exit(0); 79 } 80 81 void 82 process(FILE *fp, const char *filename) 83 { 84 int offset = 0, c, ret; 85 int state = 0; 86 char outc; 87 88 while ((c = getc(fp)) != EOF) { 89 offset++; 90 again: 91 switch(ret = unvis(&outc, (char)c, &state, 0)) { 92 case UNVIS_VALID: 93 putchar(outc); 94 break; 95 case UNVIS_VALIDPUSH: 96 putchar(outc); 97 goto again; 98 case UNVIS_SYNBAD: 99 warnx("%s: offset: %d: can't decode", filename, offset); 100 state = 0; 101 break; 102 case 0: 103 case UNVIS_NOCHAR: 104 break; 105 default: 106 errx(1, "bad return value (%d), can't happen", ret); 107 /* NOTREACHED */ 108 } 109 } 110 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 111 putchar(outc); 112 } 113