X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fpitch-scheme.cc;h=1ecc247ed13911110dfccf21463d739a718d0fe3;hb=5be4c57cff4ebd477b2b3d0899d6725794da77f0;hp=12ddddf10a1c9b71e729622fc0be5c64a5feda5d;hpb=b80683cc94b0c22bbe3fccb94a9b2e23787fd10b;p=lilypond.git

diff --git a/lily/pitch-scheme.cc b/lily/pitch-scheme.cc
index 12ddddf10a..1ecc247ed1 100644
--- a/lily/pitch-scheme.cc
+++ b/lily/pitch-scheme.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 2005--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  (c) 2005--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "pitch.hh"
@@ -25,10 +25,11 @@ LY_DEFINE (ly_pitch_transpose, "ly:pitch-transpose",
 LY_DEFINE (ly_make_pitch, "ly:make-pitch",
 	   2, 1, 0, (SCM octave, SCM note, SCM alter),
 	   "@var{octave} is specified by an integer, zero for the octave"
-	   " containing middle@tie{}C.  @var{note} is a number from 0"
-	   " to@tie{}6, with 0 corresponding to pitch@tie{}C and 6"
-	   " corresponding to pitch@tie{}B.  @var{alter} is a rational"
-	   " number of whole tones for alteration.")
+	   " containing middle@tie{}C. @var{note} is a number indexing the"
+	   " global default scale, with 0 corresponding to pitch@tie{}C"
+	   " and 6 usually corresponding to pitch@tie{}B. @var{alter} is" 
+	   " a rational number of 200-cent whole tones for alteration.")
+
 {
   LY_ASSERT_TYPE (scm_is_integer, octave, 1);
   LY_ASSERT_TYPE (scm_is_integer, note, 2);
@@ -142,3 +143,21 @@ LY_DEFINE (ly_pitch_diff, "ly:pitch-diff",
 
   return pitch_interval (*r, *p).smobbed_copy ();
 }
+
+/* FIXME: probably isn't the right place for this function */
+#include "context.hh"
+LY_DEFINE (ly_set_middle_C_x, "ly:set-middle-C!",
+	   1, 0, 0, (SCM context),
+	   "Set the @code{middleCPosition} variable in @var{context}"
+	   " based on the variables @code{middleCClefPosition} and"
+	   " middleCOffset.")
+{
+  LY_ASSERT_SMOB (Context, context, 1);
+
+  Context *c = unsmob_context (context);
+  int clef_pos = robust_scm2int (c->get_property ("middleCClefPosition"), 0);
+  int offset = robust_scm2int (c->get_property ("middleCOffset"), 0);
+
+  c->set_property (ly_symbol2scm ("middleCPosition"), scm_from_int (clef_pos + offset));
+  return SCM_UNDEFINED;
+}