Add 2011/vik/try.sh

The script will check that mplayer(1) is installed. If it is it will
pipe vik to mplayer. In that case it will still use the raw2wav program
just in case something goes wrong (or for some reason mplayer is not
what is expected). If mplayer cannot be found or is not a regular
executable file then it will just use raw2wav. The raw2wav function in
the script tells you the name of the converted file. In the case that
mplayer cannot be found the script also suggests that you play the WAV
files with a program that can play WAV files.

2011/vik/try.sh

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2011/vik
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+# in this case we won't fail if we can't compile the code because we can still
+# run the supplementary program.
+make CC="$CC" all >/dev/null
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+# fine mplayer
+MPLAYER="$(type -P mplayer)"
+
+raw2wav()
+{
+    if [[ "$#" != 2 ]]; then
+	echo "$0: raw2wav() expects two args, got: $#" 1>&2
+	return
+    fi
+
+    read -r -n 1 -p "Press any key to run: ./vik $1 > $2: "
+    echo 1>&2
+    ./vik "$1" > "$2"
+    echo 1>&2
+
+    read -r -n 1 -p "Press any key to run: ./raw2wav $1 > $2: "
+    echo 1>&2
+    ./raw2wav "$1" > "$2"
+    echo 1>&2
+    echo "Converted $1 to $2." 1>&2
+    echo 1>&2
+}
+
+if [[ -n "$MPLAYER" && -f "$MPLAYER" && -x "$MPLAYER" ]]; then
+    # If we have mplayer we'll try playing the sounds directly. If however it
+    # fails for some reason we will run the alternate procedure, creating WAV
+    # files.
+    read -r -n 1 -p "Press any key to run: ./vik randowan.mod | $MPLAYER -demuxer rawaudio -: "
+    echo 1>&2
+    ./vik randowan.mod | mplayer -demuxer rawaudio -
+    raw2wav randowan.mod randowan.wav
+
+    read -r -n 1 -p "Press any key to run: ./vik mad_world.mod | mplayer -demuxer rawaudio -: "
+    echo 1>&2
+    ./vik mad_world.mod | mplayer -demuxer rawaudio -
+    raw2wav mad_world.mod mad_world.wav
+    echo 1>&2
+else
+    raw2wav randowan.mod randowan.wav
+    [[ -f randowan.wav ]] && echo "Now try playing randowan.wav with a program that can play WAV files." 1>&2
+
+    raw2wav mad_world.mod mad_world.wav
+    [[ -f mad_world.wav ]] && echo "Now try playing mad_world.wav with a program that can play WAV files." 1>&2
+fi