From 9fadaa0cb690dd672a6da2aff8e3252c11609ce2 Mon Sep 17 00:00:00 2001
From: Stuart Henderson <sthen@cvs.openbsd.org>
Date: Tue, 19 Jan 2016 23:21:27 +0000
Subject: Teach morse(6) the <AC> prosign as '@', as added on May 24, 2004 (the
 160th anniversary of the first public Morse telegraph transmission).

Support decoding (only; not encoding) of other prosigns, including <SK>
as we were previously using for '@'.  From pjanzen.
---
 games/morse/morse.6 |  5 +++--
 games/morse/morse.c | 37 ++++++++++++++++++++++++++++++++-----
 2 files changed, 35 insertions(+), 7 deletions(-)

diff --git a/games/morse/morse.6 b/games/morse/morse.6
index 63cd4a9f3ce..0a6f42c42b3 100644
--- a/games/morse/morse.6
+++ b/games/morse/morse.6
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: morse.6,v 1.2 2016/01/18 11:24:44 sthen Exp $
+.\"	$OpenBSD: morse.6,v 1.3 2016/01/19 23:21:26 sthen Exp $
 .\"
 .\" Copyright (c) 1988, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"	@(#)bcd.6	8.1 (Berkeley) 5/31/93
 .\"
-.Dd $Mdocdate: January 18 2016 $
+.Dd $Mdocdate: January 19 2016 $
 .Dt MORSE 6
 .Os
 .Sh NAME
@@ -58,6 +58,7 @@ back into text.
 A lowercase
 .Sq x
 is printed for undecipherable input; otherwise, text is returned uppercase.
+Many procedural signs can be decoded (though not encoded).
 If the morse to be translated is given on the command line, it should be
 preceded by
 .Sq --
diff --git a/games/morse/morse.c b/games/morse/morse.c
index be4d06d6646..ae246ad67e0 100644
--- a/games/morse/morse.c
+++ b/games/morse/morse.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: morse.c,v 1.20 2016/01/18 11:27:19 sthen Exp $	*/
+/*	$OpenBSD: morse.c,v 1.21 2016/01/19 23:21:26 sthen Exp $	*/
 
 /*
  * Copyright (c) 1988, 1993
@@ -82,6 +82,7 @@ struct punc {
 	char c;
 	char *morse;
 } other[] = {
+	{ 'e', "..-.." },	/* accented e - only decodes */
 	{ ',', "--..--" },
 	{ '.', ".-.-.-" },
 	{ '?', "..--.." },
@@ -89,17 +90,34 @@ struct punc {
 	{ '-', "-....-" },
 	{ ':', "---..." },
 	{ ';', "-.-.-." },
-	{ '(', "-.--." },
+	{ '(', "-.--." },	/* KN */
 	{ ')', "-.--.-" },
 	{ '"', ".-..-." },
 	{ '`', ".-..-." },
 	{ '\'', ".----." },
-	{ '+', ".-.-." },	/* AR */
-	{ '=', "-...-" },	/* BT */
-	{ '@', "...-.-" },	/* SK */
+	{ '+', ".-.-." },	/* AR \n\n\n */
+	{ '=', "-...-" },	/* BT \n\n */
+	{ '@', ".--.-." },
+	{ '\n', ".-.-" },	/* AA (will only decode) */
 	{ '\0', NULL }
 };
 
+struct prosign {
+	char *c;
+	char *morse;
+} ps[] = {
+	{ "<AS>", ".-..." },	/* wait */
+	{ "<CL>", "-.-..-.." },
+	{ "<CT>", "-.-.-" },	/* start */
+	{ "<EE5>", "......" },	/* error */
+	{ "<EE5>", "......." },
+	{ "<EE5>", "........" },
+	{ "<SK>", "...-.-" },
+	{ "<SN>", "...-." },	/* understood */
+	{ "<SOS>", "...---..." },
+	{ NULL, NULL }
+};
+
 void	morse(int);
 void	decode(char *);
 void	show(char *);
@@ -233,6 +251,15 @@ decode(char *s)
 		}
 		i++;
 	}
+	i = 0;
+	while (ps[i].c) {
+		/* put whitespace around prosigns */
+		if (strcmp(ps[i].morse, s) == 0) {
+			printf(" %s ", ps[i].c);
+			return;
+		}
+		i++;
+	}
 	putchar('x');	/* line noise */
 }
 
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