1 /*- 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1989 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)vis.c 5.1 (Berkeley) 4/18/91";*/ 42 static char rcsid[] = "$Id: vis.c,v 1.2 1993/08/01 18:04:00 mycroft Exp $"; 43 #endif /* not lint */ 44 45 #include <stdio.h> 46 #include <vis.h> 47 48 int eflags, fold, foldwidth=80, none, markeol, debug; 49 50 main(argc, argv) 51 char *argv[]; 52 { 53 extern char *optarg; 54 extern int optind; 55 extern int errno; 56 FILE *fp; 57 int ch; 58 59 while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF) 60 switch((char)ch) { 61 case 'n': 62 none++; 63 break; 64 case 'w': 65 eflags |= VIS_WHITE; 66 break; 67 case 'c': 68 eflags |= VIS_CSTYLE; 69 break; 70 case 't': 71 eflags |= VIS_TAB; 72 break; 73 case 's': 74 eflags |= VIS_SAFE; 75 break; 76 case 'o': 77 eflags |= VIS_OCTAL; 78 break; 79 case 'b': 80 eflags |= VIS_NOSLASH; 81 break; 82 case 'F': 83 if ((foldwidth = atoi(optarg))<5) { 84 fprintf(stderr, 85 "vis: can't fold lines to less than 5 cols\n"); 86 exit(1); 87 } 88 /*FALLTHROUGH*/ 89 case 'f': 90 fold++; /* fold output lines to 80 cols */ 91 break; /* using hidden newline */ 92 case 'l': 93 markeol++; /* mark end of line with \$ */ 94 break; 95 #ifdef DEBUG 96 case 'd': 97 debug++; 98 break; 99 #endif 100 case '?': 101 default: 102 fprintf(stderr, 103 "usage: vis [-nwctsobf] [-F foldwidth]\n"); 104 exit(1); 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (*argv) 110 while (*argv) { 111 if ((fp=fopen(*argv, "r")) != NULL) 112 process(fp, *argv); 113 else 114 fprintf(stderr, "vis: %s: %s\n", *argv, 115 (char *)strerror(errno)); 116 argv++; 117 } 118 else 119 process(stdin, "<stdin>"); 120 exit(0); 121 } 122 123 process(fp, filename) 124 FILE *fp; 125 char *filename; 126 { 127 static int col = 0; 128 register char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */ 129 register int c, rachar; 130 register char nc; 131 char buff[5]; 132 133 c = getc(fp); 134 while (c != EOF) { 135 rachar = getc(fp); 136 if (none) { 137 cp = buff; 138 *cp++ = c; 139 if (c == '\\') 140 *cp++ = '\\'; 141 *cp = '\0'; 142 } else if (markeol && c == '\n') { 143 cp = buff; 144 if ((eflags & VIS_NOSLASH) == 0) 145 *cp++ = '\\'; 146 *cp++ = '$'; 147 *cp++ = '\n'; 148 *cp = '\0'; 149 } else 150 (void) vis(buff, (char)c, eflags, (char)rachar); 151 152 cp = buff; 153 if (fold) { 154 #ifdef DEBUG 155 if (debug) 156 printf("<%02d,", col); 157 #endif 158 col = foldit(cp, col, foldwidth); 159 #ifdef DEBUG 160 if (debug) 161 printf("%02d>", col); 162 #endif 163 } 164 do { 165 putchar(*cp); 166 } while (*++cp); 167 c = rachar; 168 } 169 /* 170 * terminate partial line with a hidden newline 171 */ 172 if (fold && *(cp-1) != '\n') 173 printf("\\\n"); 174 } 175