1 /* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc 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[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93"; 45 #endif 46 static char rcsid[] = "$NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $"; 47 #endif /* not lint */ 48 49 #include <stdio.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include <err.h> 54 #include <vis.h> 55 56 int eflags, fold, foldwidth=80, none, markeol, debug; 57 58 int foldit __P((char *, int, int)); 59 void process __P((FILE *, char *)); 60 61 int 62 main(argc, argv) 63 int argc; 64 char *argv[]; 65 { 66 FILE *fp; 67 int ch; 68 69 while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF) 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 fprintf(stderr, 112 "usage: vis [-nwctsobf] [-F foldwidth]\n"); 113 exit(1); 114 } 115 argc -= optind; 116 argv += optind; 117 118 if (*argv) 119 while (*argv) { 120 if ((fp=fopen(*argv, "r")) != NULL) 121 process(fp, *argv); 122 else 123 warn("%s", *argv); 124 argv++; 125 } 126 else 127 process(stdin, "<stdin>"); 128 exit(0); 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