1 /* $OpenBSD: vis.c,v 1.14 2010/08/24 23:49:06 djm 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 #include <stdio.h> 34 #include <string.h> 35 #include <stdlib.h> 36 #include <unistd.h> 37 #include <err.h> 38 #include <vis.h> 39 40 int eflags, fold, foldwidth=80, none, markeol; 41 42 #ifdef DEBUG 43 int debug; 44 #endif 45 46 int foldit(char *, int, int); 47 void process(FILE *); 48 __dead void usage(void); 49 50 int 51 main(int argc, char *argv[]) 52 { 53 FILE *fp; 54 int ch; 55 56 while ((ch = getopt(argc, argv, "anwctsobfF:ld")) != -1) 57 switch((char)ch) { 58 case 'a': 59 eflags |= VIS_ALL; 60 break; 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 errx(1, "can't fold lines to less than 5 cols"); 85 /* NOTREACHED */ 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 usage(); 102 } 103 argc -= optind; 104 argv += optind; 105 106 if (*argv) 107 while (*argv) { 108 if ((fp=fopen(*argv, "r")) != NULL) 109 process(fp); 110 else 111 warn("%s", *argv); 112 argv++; 113 } 114 else 115 process(stdin); 116 exit(0); 117 } 118 119 void 120 process(FILE *fp) 121 { 122 static int col = 0; 123 char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */ 124 int c, rachar; 125 char buff[5]; 126 127 c = getc(fp); 128 while (c != EOF) { 129 rachar = getc(fp); 130 if (none) { 131 cp = buff; 132 *cp++ = c; 133 if (c == '\\') 134 *cp++ = '\\'; 135 *cp = '\0'; 136 } else if (markeol && c == '\n') { 137 cp = buff; 138 if ((eflags & VIS_NOSLASH) == 0) 139 *cp++ = '\\'; 140 *cp++ = '$'; 141 *cp++ = '\n'; 142 *cp = '\0'; 143 } else 144 (void) vis(buff, (char)c, eflags, (char)rachar); 145 146 cp = buff; 147 if (fold) { 148 #ifdef DEBUG 149 if (debug) 150 printf("<%02d,", col); 151 #endif 152 col = foldit(cp, col, foldwidth); 153 #ifdef DEBUG 154 if (debug) 155 printf("%02d>", col); 156 #endif 157 } 158 do { 159 putchar(*cp); 160 } while (*++cp); 161 c = rachar; 162 } 163 /* 164 * terminate partial line with a hidden newline 165 */ 166 if (fold && *(cp-1) != '\n') 167 printf("\\\n"); 168 } 169 170 __dead void 171 usage(void) 172 { 173 extern char *__progname; 174 175 fprintf(stderr, "usage: %s [-abcflnostw] [-F foldwidth] [file ...]\n", 176 __progname); 177 exit(1); 178 } 179