1 /* $NetBSD: vis.c,v 1.3 1994/11/17 07:56:01 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 1.3 1994/11/17 07:56:01 jtc Exp $"; 47 #endif /* not lint */ 48 49 #include <stdio.h> 50 #include <vis.h> 51 52 int eflags, fold, foldwidth=80, none, markeol, debug; 53 54 main(argc, argv) 55 char *argv[]; 56 { 57 extern char *optarg; 58 extern int optind; 59 extern int errno; 60 FILE *fp; 61 int ch; 62 63 while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF) 64 switch((char)ch) { 65 case 'n': 66 none++; 67 break; 68 case 'w': 69 eflags |= VIS_WHITE; 70 break; 71 case 'c': 72 eflags |= VIS_CSTYLE; 73 break; 74 case 't': 75 eflags |= VIS_TAB; 76 break; 77 case 's': 78 eflags |= VIS_SAFE; 79 break; 80 case 'o': 81 eflags |= VIS_OCTAL; 82 break; 83 case 'b': 84 eflags |= VIS_NOSLASH; 85 break; 86 case 'F': 87 if ((foldwidth = atoi(optarg))<5) { 88 fprintf(stderr, 89 "vis: can't fold lines to less than 5 cols\n"); 90 exit(1); 91 } 92 /*FALLTHROUGH*/ 93 case 'f': 94 fold++; /* fold output lines to 80 cols */ 95 break; /* using hidden newline */ 96 case 'l': 97 markeol++; /* mark end of line with \$ */ 98 break; 99 #ifdef DEBUG 100 case 'd': 101 debug++; 102 break; 103 #endif 104 case '?': 105 default: 106 fprintf(stderr, 107 "usage: vis [-nwctsobf] [-F foldwidth]\n"); 108 exit(1); 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (*argv) 114 while (*argv) { 115 if ((fp=fopen(*argv, "r")) != NULL) 116 process(fp, *argv); 117 else 118 fprintf(stderr, "vis: %s: %s\n", *argv, 119 (char *)strerror(errno)); 120 argv++; 121 } 122 else 123 process(stdin, "<stdin>"); 124 exit(0); 125 } 126 127 process(fp, filename) 128 FILE *fp; 129 char *filename; 130 { 131 static int col = 0; 132 register char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */ 133 register int c, rachar; 134 register char nc; 135 char buff[5]; 136 137 c = getc(fp); 138 while (c != EOF) { 139 rachar = getc(fp); 140 if (none) { 141 cp = buff; 142 *cp++ = c; 143 if (c == '\\') 144 *cp++ = '\\'; 145 *cp = '\0'; 146 } else if (markeol && c == '\n') { 147 cp = buff; 148 if ((eflags & VIS_NOSLASH) == 0) 149 *cp++ = '\\'; 150 *cp++ = '$'; 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