1 /* $OpenBSD: vis.c,v 1.11 2007/03/15 23:17:20 jmc Exp $ */ 2 /* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $ */ 3 4 /*- 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1989, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #ifndef lint 40 #if 0 41 static const char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93"; 42 #endif 43 static const char rcsid[] = "$OpenBSD: vis.c,v 1.11 2007/03/15 23:17:20 jmc Exp $"; 44 #endif /* not lint */ 45 46 #include <stdio.h> 47 #include <string.h> 48 #include <stdlib.h> 49 #include <unistd.h> 50 #include <err.h> 51 #include <vis.h> 52 53 int eflags, fold, foldwidth=80, none, markeol; 54 55 #ifdef DEBUG 56 int debug; 57 #endif 58 59 int foldit(char *, int, int); 60 void process(FILE *); 61 __dead void usage(void); 62 63 int 64 main(int argc, char *argv[]) 65 { 66 FILE *fp; 67 int ch; 68 69 while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != -1) 70 switch((char)ch) { 71 case 'n': 72 none++; 73 break; 74 case 'w': 75 eflags |= VIS_WHITE; 76 break; 77 case 'c': 78 eflags |= VIS_CSTYLE; 79 break; 80 case 't': 81 eflags |= VIS_TAB; 82 break; 83 case 's': 84 eflags |= VIS_SAFE; 85 break; 86 case 'o': 87 eflags |= VIS_OCTAL; 88 break; 89 case 'b': 90 eflags |= VIS_NOSLASH; 91 break; 92 case 'F': 93 if ((foldwidth = atoi(optarg))<5) { 94 errx(1, "can't fold lines to less than 5 cols"); 95 /* NOTREACHED */ 96 } 97 /*FALLTHROUGH*/ 98 case 'f': 99 fold++; /* fold output lines to 80 cols */ 100 break; /* using hidden newline */ 101 case 'l': 102 markeol++; /* mark end of line with \$ */ 103 break; 104 #ifdef DEBUG 105 case 'd': 106 debug++; 107 break; 108 #endif 109 case '?': 110 default: 111 usage(); 112 } 113 argc -= optind; 114 argv += optind; 115 116 if (*argv) 117 while (*argv) { 118 if ((fp=fopen(*argv, "r")) != NULL) 119 process(fp); 120 else 121 warn("%s", *argv); 122 argv++; 123 } 124 else 125 process(stdin); 126 exit(0); 127 } 128 129 void 130 process(FILE *fp) 131 { 132 static int col = 0; 133 char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */ 134 int c, rachar; 135 char buff[5]; 136 137 c = getc(fp); 138 while (c != EOF) { 139 rachar = getc(fp); 140 if (none) { 141 cp = buff; 142 *cp++ = c; 143 if (c == '\\') 144 *cp++ = '\\'; 145 *cp = '\0'; 146 } else if (markeol && c == '\n') { 147 cp = buff; 148 if ((eflags & VIS_NOSLASH) == 0) 149 *cp++ = '\\'; 150 *cp++ = '$'; 151 *cp++ = '\n'; 152 *cp = '\0'; 153 } else 154 (void) vis(buff, (char)c, eflags, (char)rachar); 155 156 cp = buff; 157 if (fold) { 158 #ifdef DEBUG 159 if (debug) 160 printf("<%02d,", col); 161 #endif 162 col = foldit(cp, col, foldwidth); 163 #ifdef DEBUG 164 if (debug) 165 printf("%02d>", col); 166 #endif 167 } 168 do { 169 putchar(*cp); 170 } while (*++cp); 171 c = rachar; 172 } 173 /* 174 * terminate partial line with a hidden newline 175 */ 176 if (fold && *(cp-1) != '\n') 177 printf("\\\n"); 178 } 179 180 __dead void 181 usage(void) 182 { 183 extern char *__progname; 184 185 fprintf(stderr, "usage: %s [-bcflnostw] [-F foldwidth] [file ...]\n", 186 __progname); 187 exit(1); 188 } 189