1 /* $NetBSD: morse.c,v 1.19 2021/05/02 12:50:45 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 #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 1.19 2021/05/02 12:50:45 rillig 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 { '\0', NULL } 112 }; 113 114 int main(int, char *[]); 115 static void morse(int); 116 static void decode(const char *); 117 static void show(const char *); 118 119 static int sflag; 120 static int dflag; 121 122 int 123 main(int argc, char **argv) 124 { 125 int ch; 126 char *p; 127 128 /* Revoke setgid privileges */ 129 setgid(getgid()); 130 131 while ((ch = getopt(argc, argv, "ds")) != -1) 132 switch((char)ch) { 133 case 'd': 134 dflag = 1; 135 break; 136 case 's': 137 sflag = 1; 138 break; 139 case '?': 140 default: 141 fprintf(stderr, "usage: morse [-ds] [string ...]\n"); 142 exit(1); 143 } 144 argc -= optind; 145 argv += optind; 146 147 if (dflag) { 148 if (*argv) { 149 do { 150 decode(*argv); 151 } while (*++argv); 152 } else { 153 char foo[10]; /* All morse chars shorter than this */ 154 int is_blank, i; 155 156 i = 0; 157 is_blank = 0; 158 while ((ch = getchar()) != EOF) { 159 if (ch == '-' || ch == '.') { 160 foo[i++] = ch; 161 if (i == 10) { 162 /* overrun means gibberish--print 'x' and 163 * advance */ 164 i = 0; 165 putchar('x'); 166 while ((ch = getchar()) != EOF && 167 (ch == '.' || ch == '-')) 168 ; 169 is_blank = 1; 170 } 171 } else if (i) { 172 foo[i] = '\0'; 173 decode(foo); 174 i = 0; 175 is_blank = 0; 176 } else if (isspace(ch)) { 177 if (is_blank) { 178 /* print whitespace for each double blank */ 179 putchar(' '); 180 is_blank = 0; 181 } else 182 is_blank = 1; 183 } 184 } 185 } 186 putchar('\n'); 187 } else { 188 if (*argv) 189 do { 190 for (p = *argv; *p; ++p) 191 morse((int)*p); 192 show(""); 193 } while (*++argv); 194 else while ((ch = getchar()) != EOF) 195 morse(ch); 196 show("...-.-"); /* SK */ 197 } 198 199 return 0; 200 } 201 202 void 203 decode(const char *s) 204 { 205 int i; 206 207 for (i = 0; i < 10; i++) 208 if (strcmp(digit[i], s) == 0) { 209 putchar('0' + i); 210 return; 211 } 212 213 for (i = 0; i < 26; i++) 214 if (strcmp(alph[i], s) == 0) { 215 putchar('A' + i); 216 return; 217 } 218 i = 0; 219 while (other[i].c) { 220 if (strcmp(other[i].morse, s) == 0) { 221 putchar(other[i].c); 222 return; 223 } 224 i++; 225 } 226 if (strcmp("...-.-", s) == 0) 227 return; 228 putchar('x'); /* line noise */ 229 } 230 231 void 232 morse(int c) 233 { 234 int i; 235 236 if (isalpha(c)) 237 show(alph[c - (isupper(c) ? 'A' : 'a')]); 238 else if (isdigit(c)) 239 show(digit[c - '0']); 240 else if (isspace(c)) 241 show(""); /* could show BT for a pause */ 242 else { 243 i = 0; 244 while (other[i].c) { 245 if (other[i].c == c) { 246 show(other[i].morse); 247 break; 248 } 249 i++; 250 } 251 } 252 } 253 254 void 255 show(const char *s) 256 { 257 if (sflag) 258 printf(" %s", s); 259 else for (; *s; ++s) 260 printf(" %s", *s == '.' ? "dit" : "daw"); 261 printf("\n"); 262 } 263