1 /* $NetBSD: vis.c,v 1.7 2002/12/23 01:45:54 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) 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 __RCSID("$NetBSD: vis.c,v 1.7 2002/12/23 01:45:54 lukem 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 char *extra; 58 59 int foldit __P((char *, int, int)); 60 int main __P((int, char **)); 61 void process __P((FILE *, char *)); 62 63 int 64 main(argc, argv) 65 int argc; 66 char *argv[]; 67 { 68 FILE *fp; 69 int ch; 70 int rval; 71 72 while ((ch = getopt(argc, argv, "nwctsobe:fF:ld")) != -1) 73 switch((char)ch) { 74 case 'n': 75 none++; 76 break; 77 case 'w': 78 eflags |= VIS_WHITE; 79 break; 80 case 'c': 81 eflags |= VIS_CSTYLE; 82 break; 83 case 't': 84 eflags |= VIS_TAB; 85 break; 86 case 's': 87 eflags |= VIS_SAFE; 88 break; 89 case 'o': 90 eflags |= VIS_OCTAL; 91 break; 92 case 'b': 93 eflags |= VIS_NOSLASH; 94 break; 95 case 'e': 96 extra = optarg; 97 break; 98 case 'F': 99 if ((foldwidth = atoi(optarg))<5) { 100 errx(1, "can't fold lines to less than 5 cols"); 101 /* NOTREACHED */ 102 } 103 /*FALLTHROUGH*/ 104 case 'f': 105 fold++; /* fold output lines to 80 cols */ 106 break; /* using hidden newline */ 107 case 'l': 108 markeol++; /* mark end of line with \$ */ 109 break; 110 #ifdef DEBUG 111 case 'd': 112 debug++; 113 break; 114 #endif 115 case '?': 116 default: 117 fprintf(stderr, 118 "Usage: vis [-nwctsobf] [-e extra] [-F foldwidth]\n"); 119 exit(1); 120 } 121 argc -= optind; 122 argv += optind; 123 124 rval = 0; 125 126 if (*argv) 127 while (*argv) { 128 if ((fp=fopen(*argv, "r")) != NULL) { 129 process(fp, *argv); 130 fclose(fp); 131 } else { 132 warn("%s", *argv); 133 rval = 1; 134 } 135 argv++; 136 } 137 else 138 process(stdin, "<stdin>"); 139 exit(rval); 140 } 141 142 void 143 process(fp, filename) 144 FILE *fp; 145 char *filename; 146 { 147 static int col = 0; 148 char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */ 149 int c, rachar; 150 char buff[5]; 151 152 c = getc(fp); 153 while (c != EOF) { 154 rachar = getc(fp); 155 if (none) { 156 cp = buff; 157 *cp++ = c; 158 if (c == '\\') 159 *cp++ = '\\'; 160 *cp = '\0'; 161 } else if (markeol && c == '\n') { 162 cp = buff; 163 if ((eflags & VIS_NOSLASH) == 0) 164 *cp++ = '\\'; 165 *cp++ = '$'; 166 *cp++ = '\n'; 167 *cp = '\0'; 168 } else if (extra) 169 (void) svis(buff, (char)c, eflags, (char)rachar, extra); 170 else 171 (void) vis(buff, (char)c, eflags, (char)rachar); 172 173 cp = buff; 174 if (fold) { 175 #ifdef DEBUG 176 if (debug) 177 printf("<%02d,", col); 178 #endif 179 col = foldit(cp, col, foldwidth); 180 #ifdef DEBUG 181 if (debug) 182 printf("%02d>", col); 183 #endif 184 } 185 do { 186 putchar(*cp); 187 } while (*++cp); 188 c = rachar; 189 } 190 /* 191 * terminate partial line with a hidden newline 192 */ 193 if (fold && *(cp-1) != '\n') 194 printf("\\\n"); 195 } 196