From 6f91b67cf342c6a849b7d93d24924e80f1b7d714 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Fri, 9 Sep 2016 21:28:10 +1200
Subject: Add rot13(6df)

---
 .gitignore         |  1 +
 Makefile           |  3 ++-
 README.markdown    |  1 +
 games/rot13.sed    |  3 +++
 man/man6/rot13.6df | 20 ++++++++++++++++++++
 5 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100755 games/rot13.sed
 create mode 100644 man/man6/rot13.6df

diff --git a/.gitignore b/.gitignore
index bab3eb65..1e9e814f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,7 @@ bin/tot
 bin/unf
 games/acq
 games/kvlt
+games/rot13
 games/zs
 git/gitconfig
 gnupg/gpg.conf
diff --git a/Makefile b/Makefile
index 6353688c..d8e61785 100644
--- a/Makefile
+++ b/Makefile
@@ -97,6 +97,7 @@ clean distclean :
 		bin/unf \
 		games/acq \
 		games/kvlt \
+		games/rot13 \
 		games/zs \
 		git/gitconfig \
 		gnupg/gpg.conf \
@@ -209,7 +210,7 @@ install-finger :
 	install -pm 0644 -- finger/project "$(HOME)"/.project
 	install -pm 0644 -- finger/pgpkey "$(HOME)"/.pgpkey
 
-install-games : games/acq games/kvlt games/zs check-games install-games-man
+install-games : games/acq games/kvlt games/rot13 games/zs check-games install-games-man
 	install -m 0755 -d -- "$(HOME)"/.local/games
 	for name in games/* ; do \
 		[ -x "$$name" ] || continue ; \
diff --git a/README.markdown b/README.markdown
index 2d943a9e..5b833ad8 100644
--- a/README.markdown
+++ b/README.markdown
@@ -476,6 +476,7 @@ There's some silly stuff in `install-games`:
 *   `kvlt(6df)` translates input to emulate a style of typing unique to black
     metal communities on the internet.
 *   `rndn(6df)` implements an esoteric random number generation algorithm.
+*   `rot13(6df)` rotates the Latin letters in its input.
 *   `xyzzy(6df)` teleports to a marked location on the filesystem.
 *   `zs(6df)` prepends "z" case-appropriately to every occurrence of "s" in the
     text on its standard input.
diff --git a/games/rot13.sed b/games/rot13.sed
new file mode 100755
index 00000000..7fb8fac9
--- /dev/null
+++ b/games/rot13.sed
@@ -0,0 +1,3 @@
+# Latin ROT-13 cipher
+y/abcdefghijklmnopqrstuvwxyz/nopqrstuvwxyzabcdefghijklm/
+y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/NOPQRSTUVWXYZABCDEFGHIJKLM/
diff --git a/man/man6/rot13.6df b/man/man6/rot13.6df
new file mode 100644
index 00000000..9856e61c
--- /dev/null
+++ b/man/man6/rot13.6df
@@ -0,0 +1,20 @@
+.TH ROT13 6df "September 2016" "Manual page for rot13"
+.SH NAME
+.B rot13
+\- Latin ROT13 cipher
+.SH USAGE
+.B rot13
+.br
+.B rot13
+file
+.br
+.B rot13
+file1 file2 file3
+.br
+.B rot13 < file
+.SH DESCRIPTION
+.B rot13
+implements the ROT13 Caesar cipher for the Latin letters with sed(1), both
+upper and lowercase.
+.SH AUTHORS
+Tom Ryder <tom@sanctum.geek.nz>
-- 
cgit v1.2.3