X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=ly%2Fpredefined-fretboards-init.ly;h=ccbcf321ce58b5a87da52c8b7a2fbbd35ce3e096;hb=63309b4631701409b02abb29596325312ba84be6;hp=9e91ed2220252025d8db37b764f898acc7aa79a5;hpb=235de94b7408e9badc7b82c8e0dae8f05009adc3;p=lilypond.git

diff --git a/ly/predefined-fretboards-init.ly b/ly/predefined-fretboards-init.ly
index 9e91ed2220..ccbcf321ce 100644
--- a/ly/predefined-fretboards-init.ly
+++ b/ly/predefined-fretboards-init.ly
@@ -1,6 +1,6 @@
 %%%% This file is part of LilyPond, the GNU music typesetter.
 %%%%
-%%%% Copyright (C) 2008--2010 Carl D. Sorensen <c_sorensen@byu.edu>
+%%%% Copyright (C) 2008--2011 Carl D. Sorensen <c_sorensen@byu.edu>
 %%%%
 %%%% LilyPond is free software: you can redistribute it and/or modify
 %%%% it under the terms of the GNU General Public License as published by
@@ -42,12 +42,28 @@ hash with the key @var{(cons key-symbol tuning)}.")
 #(define (chord-shape shape-code tuning)
    (get-chord-shape shape-code tuning chord-shape-table))
 
+% scheme function for copying/creating fretboard tables
+
+#(define (make-fretboard-table . rest)
+  "Create a new fretboard table.  @code{rest} is an optional table name.
+If present, the new fretboard table starts as a copy of the fretboard
+table @code{rest}."
+  (if (null? rest)
+      (make-hash-table 101)
+      (let ((source-table (car rest)))
+        (hash-fold
+          (lambda (key value tab)
+            (hash-set! tab key value)
+            tab)
+          (make-hash-table 101)
+          source-table))))
+
 % music function for adding a predefined diagram to
 % fretboard-table
 
 storePredefinedDiagram =
-#(define-music-function (parser location
-    fretboard-table chord tuning diagram-definition)
+#(define-music-function
+   (parser location fretboard-table chord tuning diagram-definition)
    (hash-table? ly:music? pair? string-or-pair?)
   (_i "Add predefined fret diagram defined by @var{diagram-definition}
   for the chord pitches @var{chord} and the stringTuning @var{tuning}.")