1 /* $NetBSD: morse.c,v 1.23 2024/10/12 19:26:24 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\ 34 The Regents of the University of California. All rights reserved."); 35 /* @(#)morse.c 8.1 (Berkeley) 5/31/93 */ 36 __RCSID("$NetBSD: morse.c,v 1.23 2024/10/12 19:26:24 rillig Exp $"); 37 38 #include <ctype.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 static const char digit[][6] = { 45 "-----", 46 ".----", 47 "..---", 48 "...--", 49 "....-", 50 ".....", 51 "-....", 52 "--...", 53 "---..", 54 "----.", 55 }; 56 57 static const char alph[][5] = { 58 ".-", 59 "-...", 60 "-.-.", 61 "-..", 62 ".", 63 "..-.", 64 "--.", 65 "....", 66 "..", 67 ".---", 68 "-.-", 69 ".-..", 70 "--", 71 "-.", 72 "---", 73 ".--.", 74 "--.-", 75 ".-.", 76 "...", 77 "-", 78 "..-", 79 "...-", 80 ".--", 81 "-..-", 82 "-.--", 83 "--..", 84 }; 85 86 static const struct { 87 char c; 88 const char morse[7]; 89 } other[] = { 90 { '.', ".-.-.-" }, 91 { ',', "--..--" }, 92 { ':', "---..." }, 93 { '?', "..--.." }, 94 { '\'', ".----." }, 95 { '-', "-....-" }, 96 { '/', "-..-." }, 97 { '(', "-.--." }, 98 { ')', "-.--.-" }, 99 { '"', ".-..-." }, 100 { '=', "-...-" }, 101 { '+', ".-.-." }, 102 { '_', "..--.-" }, 103 { '@', ".--.-." }, 104 { '\0', "" } 105 }; 106 107 static void morse(int); 108 static void decode(const char *); 109 static void show(const char *); 110 111 static int sflag; 112 static int dflag; 113 114 int 115 main(int argc, char **argv) 116 { 117 int ch; 118 char *p; 119 120 /* Revoke setgid privileges */ 121 setgid(getgid()); 122 123 while ((ch = getopt(argc, argv, "ds")) != -1) 124 switch ((char)ch) { 125 case 'd': 126 dflag = 1; 127 break; 128 case 's': 129 sflag = 1; 130 break; 131 default: 132 fprintf(stderr, "usage: morse [-ds] [string ...]\n"); 133 exit(1); 134 } 135 argc -= optind; 136 argv += optind; 137 138 if (dflag) { 139 if (*argv) { 140 do { 141 decode(*argv); 142 } while (*++argv); 143 } else { 144 char foo[10]; /* All morse chars shorter than this */ 145 int is_blank, i; 146 147 i = 0; 148 is_blank = 0; 149 while ((ch = getchar()) != EOF) { 150 if (ch == '-' || ch == '.') { 151 foo[i++] = ch; 152 if (i == 10) { 153 /* overrun means gibberish--print 'x' and 154 * advance */ 155 i = 0; 156 putchar('x'); 157 while ((ch = getchar()) != EOF && 158 (ch == '.' || ch == '-')) 159 ; 160 is_blank = 1; 161 } 162 } else if (i) { 163 foo[i] = '\0'; 164 decode(foo); 165 i = 0; 166 is_blank = 0; 167 } else if (isspace(ch)) { 168 if (is_blank) { 169 /* print whitespace for each double blank */ 170 putchar(' '); 171 is_blank = 0; 172 } else 173 is_blank = 1; 174 } 175 } 176 } 177 putchar('\n'); 178 } else { 179 if (*argv) 180 do { 181 for (p = *argv; *p; ++p) 182 morse((unsigned char)*p); 183 show(""); 184 } while (*++argv); 185 else while ((ch = getchar()) != EOF) 186 morse(ch); 187 show("...-.-"); /* SK */ 188 } 189 190 return 0; 191 } 192 193 void 194 decode(const char *s) 195 { 196 for (size_t i = 0; i < __arraycount(digit); i++) 197 if (strcmp(digit[i], s) == 0) { 198 putchar('0' + i); 199 return; 200 } 201 202 for (size_t i = 0; i < __arraycount(alph); i++) 203 if (strcmp(alph[i], s) == 0) { 204 putchar('A' + i); 205 return; 206 } 207 208 for (size_t i = 0; other[i].c; i++) 209 if (strcmp(other[i].morse, s) == 0) { 210 putchar(other[i].c); 211 return; 212 } 213 214 if (strcmp("...-.-", s) == 0) /* SK */ 215 return; 216 217 putchar('x'); /* line noise */ 218 } 219 220 void 221 morse(int c) 222 { 223 if (isalpha(c)) 224 show(alph[c - (isupper(c) ? 'A' : 'a')]); 225 else if (isdigit(c)) 226 show(digit[c - '0']); 227 else if (isspace(c)) 228 show(""); /* could show BT for a pause */ 229 else 230 for (int i = 0; other[i].c; i++) 231 if (other[i].c == c) { 232 show(other[i].morse); 233 break; 234 } 235 } 236 237 void 238 show(const char *s) 239 { 240 if (sflag) 241 printf(" %s", s); 242 else for (; *s; ++s) 243 printf(" %s", *s == '.' ? "dit" : "daw"); 244 printf("\n"); 245 } 246