1 /* $NetBSD: morse.c,v 1.20 2023/06/01 04:08:36 mrg 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 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)morse.c 8.1 (Berkeley) 5/31/93"; 41 #else 42 __RCSID("$NetBSD: morse.c,v 1.20 2023/06/01 04:08:36 mrg Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 #include <ctype.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 52 static const char 53 *const digit[] = { 54 "-----", 55 ".----", 56 "..---", 57 "...--", 58 "....-", 59 ".....", 60 "-....", 61 "--...", 62 "---..", 63 "----.", 64 }, 65 *const alph[] = { 66 ".-", 67 "-...", 68 "-.-.", 69 "-..", 70 ".", 71 "..-.", 72 "--.", 73 "....", 74 "..", 75 ".---", 76 "-.-", 77 ".-..", 78 "--", 79 "-.", 80 "---", 81 ".--.", 82 "--.-", 83 ".-.", 84 "...", 85 "-", 86 "..-", 87 "...-", 88 ".--", 89 "-..-", 90 "-.--", 91 "--..", 92 }; 93 94 static const struct punc { 95 char c; 96 const char *morse; 97 } other[] = { 98 { '.', ".-.-.-" }, 99 { ',', "--..--" }, 100 { ':', "---..." }, 101 { '?', "..--.." }, 102 { '\'', ".----." }, 103 { '-', "-....-" }, 104 { '/', "-..-." }, 105 { '(', "-.--." }, 106 { ')', "-.--.-" }, 107 { '"', ".-..-." }, 108 { '=', "-...-" }, 109 { '+', ".-.-." }, 110 { '_', "..--.-" }, 111 { '@', ".--.-." }, 112 { '\0', NULL } 113 }; 114 115 int main(int, char *[]); 116 static void morse(int); 117 static void decode(const char *); 118 static void show(const char *); 119 120 static int sflag; 121 static int dflag; 122 123 int 124 main(int argc, char **argv) 125 { 126 int ch; 127 char *p; 128 129 /* Revoke setgid privileges */ 130 setgid(getgid()); 131 132 while ((ch = getopt(argc, argv, "ds")) != -1) 133 switch((char)ch) { 134 case 'd': 135 dflag = 1; 136 break; 137 case 's': 138 sflag = 1; 139 break; 140 case '?': 141 default: 142 fprintf(stderr, "usage: morse [-ds] [string ...]\n"); 143 exit(1); 144 } 145 argc -= optind; 146 argv += optind; 147 148 if (dflag) { 149 if (*argv) { 150 do { 151 decode(*argv); 152 } while (*++argv); 153 } else { 154 char foo[10]; /* All morse chars shorter than this */ 155 int is_blank, i; 156 157 i = 0; 158 is_blank = 0; 159 while ((ch = getchar()) != EOF) { 160 if (ch == '-' || ch == '.') { 161 foo[i++] = ch; 162 if (i == 10) { 163 /* overrun means gibberish--print 'x' and 164 * advance */ 165 i = 0; 166 putchar('x'); 167 while ((ch = getchar()) != EOF && 168 (ch == '.' || ch == '-')) 169 ; 170 is_blank = 1; 171 } 172 } else if (i) { 173 foo[i] = '\0'; 174 decode(foo); 175 i = 0; 176 is_blank = 0; 177 } else if (isspace(ch)) { 178 if (is_blank) { 179 /* print whitespace for each double blank */ 180 putchar(' '); 181 is_blank = 0; 182 } else 183 is_blank = 1; 184 } 185 } 186 } 187 putchar('\n'); 188 } else { 189 if (*argv) 190 do { 191 for (p = *argv; *p; ++p) 192 morse((int)*p); 193 show(""); 194 } while (*++argv); 195 else while ((ch = getchar()) != EOF) 196 morse(ch); 197 show("...-.-"); /* SK */ 198 } 199 200 return 0; 201 } 202 203 void 204 decode(const char *s) 205 { 206 int i; 207 208 for (i = 0; i < 10; i++) 209 if (strcmp(digit[i], s) == 0) { 210 putchar('0' + i); 211 return; 212 } 213 214 for (i = 0; i < 26; i++) 215 if (strcmp(alph[i], s) == 0) { 216 putchar('A' + i); 217 return; 218 } 219 i = 0; 220 while (other[i].c) { 221 if (strcmp(other[i].morse, s) == 0) { 222 putchar(other[i].c); 223 return; 224 } 225 i++; 226 } 227 if (strcmp("...-.-", s) == 0) 228 return; 229 putchar('x'); /* line noise */ 230 } 231 232 void 233 morse(int c) 234 { 235 int i; 236 237 if (isalpha(c)) 238 show(alph[c - (isupper(c) ? 'A' : 'a')]); 239 else if (isdigit(c)) 240 show(digit[c - '0']); 241 else if (isspace(c)) 242 show(""); /* could show BT for a pause */ 243 else { 244 i = 0; 245 while (other[i].c) { 246 if (other[i].c == c) { 247 show(other[i].morse); 248 break; 249 } 250 i++; 251 } 252 } 253 } 254 255 void 256 show(const char *s) 257 { 258 if (sflag) 259 printf(" %s", s); 260 else for (; *s; ++s) 261 printf(" %s", *s == '.' ? "dit" : "daw"); 262 printf("\n"); 263 } 264