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