1 /*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)vis.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/vis/vis.c,v 1.6 1999/08/28 01:07:25 peter Exp $ 36 * $DragonFly: src/usr.bin/vis/vis.c,v 1.2 2003/06/17 04:29:33 dillon Exp $ 37 */ 38 39 #include <err.h> 40 #include <locale.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <vis.h> 45 46 int eflags, fold, foldwidth=80, none, markeol, debug; 47 48 void process __P((FILE *, char *filename)); 49 static void usage __P((void)); 50 extern int foldit __P((char *, int, int)); 51 52 int 53 main(argc, argv) 54 char *argv[]; 55 { 56 FILE *fp; 57 int ch; 58 59 (void) setlocale(LC_CTYPE, ""); 60 61 while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != -1) 62 switch((char)ch) { 63 case 'n': 64 none++; 65 break; 66 case 'w': 67 eflags |= VIS_WHITE; 68 break; 69 case 'c': 70 eflags |= VIS_CSTYLE; 71 break; 72 case 't': 73 eflags |= VIS_TAB; 74 break; 75 case 's': 76 eflags |= VIS_SAFE; 77 break; 78 case 'o': 79 eflags |= VIS_OCTAL; 80 break; 81 case 'b': 82 eflags |= VIS_NOSLASH; 83 break; 84 case 'F': 85 if ((foldwidth = atoi(optarg))<5) 86 errx(1, "can't fold lines to less than 5 cols"); 87 /*FALLTHROUGH*/ 88 case 'f': 89 fold++; /* fold output lines to 80 cols */ 90 break; /* using hidden newline */ 91 case 'l': 92 markeol++; /* mark end of line with \$ */ 93 break; 94 #ifdef DEBUG 95 case 'd': 96 debug++; 97 break; 98 #endif 99 case '?': 100 default: 101 usage(); 102 } 103 argc -= optind; 104 argv += optind; 105 106 if (*argv) 107 while (*argv) { 108 if ((fp=fopen(*argv, "r")) != NULL) 109 process(fp, *argv); 110 else 111 warn("%s", *argv); 112 argv++; 113 } 114 else 115 process(stdin, "<stdin>"); 116 exit(0); 117 } 118 119 120 static void 121 usage() 122 { 123 #ifdef DEBUG 124 fprintf(stderr, "usage: vis [-cbflnostwd] [-F foldwidth] [file ...]\n"); 125 #else 126 fprintf(stderr, "usage: vis [-cbflnostw] [-F foldwidth] [file ...]\n"); 127 #endif 128 exit(1); 129 } 130 131 void 132 process(fp, filename) 133 FILE *fp; 134 char *filename; 135 { 136 static int col = 0; 137 register char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */ 138 register int c, rachar; 139 char buff[5]; 140 141 c = getc(fp); 142 while (c != EOF) { 143 rachar = getc(fp); 144 if (none) { 145 cp = buff; 146 *cp++ = c; 147 if (c == '\\') 148 *cp++ = '\\'; 149 *cp = '\0'; 150 } else if (markeol && c == '\n') { 151 cp = buff; 152 if ((eflags & VIS_NOSLASH) == 0) 153 *cp++ = '\\'; 154 *cp++ = '$'; 155 *cp++ = '\n'; 156 *cp = '\0'; 157 } else 158 (void) vis(buff, (char)c, eflags, (char)rachar); 159 160 cp = buff; 161 if (fold) { 162 #ifdef DEBUG 163 if (debug) 164 printf("<%02d,", col); 165 #endif 166 col = foldit(cp, col, foldwidth); 167 #ifdef DEBUG 168 if (debug) 169 printf("%02d>", col); 170 #endif 171 } 172 do { 173 putchar(*cp); 174 } while (*++cp); 175 c = rachar; 176 } 177 /* 178 * terminate partial line with a hidden newline 179 */ 180 if (fold && *(cp-1) != '\n') 181 printf("\\\n"); 182 } 183