1 /* $NetBSD: unvis.c,v 1.10 2004/04/22 06:55:15 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. 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 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) 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 __RCSID("$NetBSD: unvis.c,v 1.10 2004/04/22 06:55:15 lukem Exp $"); 43 #endif /* not lint */ 44 45 #include <err.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include <vis.h> 50 51 int eflags; 52 53 int main __P((int, char **)); 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, "h")) != -1) 65 switch((char)ch) { 66 case 'h': 67 eflags |= VIS_HTTPSTYLE; 68 break; 69 case '?': 70 default: 71 (void) fprintf(stderr, "usage: unvis [-h] [file...]\n"); 72 exit(1); 73 } 74 argc -= optind; 75 argv += optind; 76 77 if (*argv) 78 while (*argv) { 79 if ((fp=fopen(*argv, "r")) != NULL) 80 process(fp, *argv); 81 else 82 warn("%s", *argv); 83 argv++; 84 } 85 else 86 process(stdin, "<stdin>"); 87 exit(0); 88 } 89 90 void 91 process(fp, filename) 92 FILE *fp; 93 const char *filename; 94 { 95 int offset = 0, c, ret; 96 int state = 0; 97 char outc; 98 99 while ((c = getc(fp)) != EOF) { 100 offset++; 101 again: 102 switch(ret = unvis(&outc, (char)c, &state, eflags)) { 103 case UNVIS_VALID: 104 putchar(outc); 105 break; 106 case UNVIS_VALIDPUSH: 107 putchar(outc); 108 goto again; 109 case UNVIS_SYNBAD: 110 warnx("%s: offset: %d: can't decode", filename, offset); 111 state = 0; 112 break; 113 case 0: 114 case UNVIS_NOCHAR: 115 break; 116 default: 117 errx(1, "bad return value (%d), can't happen", ret); 118 /* NOTREACHED */ 119 } 120 } 121 if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID) 122 putchar(outc); 123 } 124