1 /* $OpenBSD: unvis.c,v 1.3 1997/01/15 23:43:29 millert 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 #ifndef lint 37 static char copyright[] = 38 "@(#) 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 static char rcsid[] = "$OpenBSD: unvis.c,v 1.3 1997/01/15 23:43:29 millert Exp $"; 47 #endif /* not lint */ 48 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <err.h> 52 #include <vis.h> 53 54 void process __P((FILE *fp, const char *filename)); 55 56 int 57 main(argc, argv) 58 int argc; 59 char *argv[]; 60 { 61 FILE *fp; 62 int ch; 63 64 while ((ch = getopt(argc, argv, "")) != -1) 65 switch((char)ch) { 66 case '?': 67 default: 68 (void) fprintf(stderr, "usage: unvis [file...]\n"); 69 exit(1); 70 } 71 argc -= optind; 72 argv += optind; 73 74 if (*argv) 75 while (*argv) { 76 if ((fp=fopen(*argv, "r")) != NULL) 77 process(fp, *argv); 78 else 79 warn("%s", *argv); 80 argv++; 81 } 82 else 83 process(stdin, "<stdin>"); 84 exit(0); 85 } 86 87 void 88 process(fp, filename) 89 FILE *fp; 90 const char *filename; 91 { 92 register int offset = 0, c, ret; 93 int state = 0; 94 char outc; 95 96 while ((c = getc(fp)) != EOF) { 97 offset++; 98 again: 99 switch(ret = unvis(&outc, (char)c, &state, 0)) { 100 case UNVIS_VALID: 101 putchar(outc); 102 break; 103 case UNVIS_VALIDPUSH: 104 putchar(outc); 105 goto again; 106 case UNVIS_SYNBAD: 107 warnx("%s: offset: %d: can't decode", filename, offset); 108 state = 0; 109 break; 110 case 0: 111 case UNVIS_NOCHAR: 112 break; 113 default: 114 errx(1, "bad return value (%d), can't happen", ret); 115 /* NOTREACHED */ 116 } 117 } 118 if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID) 119 putchar(outc); 120 } 121