X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fmisc.cc;h=6cafa2b50b3669fac258e5d2b1d3e51cdb737db1;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=08f3827abbf48122cc27ceb281e455ebe5aebe23;hpb=eb72c0f066957c3e71d336db0f72814e34d3964d;p=lilypond.git

diff --git a/lily/misc.cc b/lily/misc.cc
index 08f3827abb..6cafa2b50b 100644
--- a/lily/misc.cc
+++ b/lily/misc.cc
@@ -1,33 +1,26 @@
 /*
-  misc.cc -- implement various stuff
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
-
-  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
   Jan Nieuwenhuizen <janneke@gnu.org>
-*/
 
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
 
-#include "misc.hh"
-#include "string.hh"
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
 
-/*
-  Return the 2-log, rounded down
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
-int
-intlog2 (int d)
-{
-  assert (d);
-  int i = 0;
-  while ((d != 1))
-    {
-      d /= 2;
-      i++;
-    }
 
-  assert (! (d / 2));
-  return i;
-}
+#include "misc.hh"
+#include "offset.hh"
+#include "warn.hh"
 
 double
 log_2 (double x)
@@ -35,26 +28,52 @@ log_2 (double x)
   return log (x) / log (2.0);
 }
 
-Array<String>
-split_string (String s, char c)
+Real
+directed_round (Real f, Direction d)
 {
-  Array<String> rv;
-  while (s.length ())
-    {
-      int i = s.index (c);
+  if (d < 0)
+    return floor (f);
+  else
+    return ceil (f);
+}
 
-      if (i == 0)
-	{
-	  s = s.nomid_string (0, 1);
-	  continue;
-	}
+/*
+   0 at threshold,  1 at 0, with 1/x falloff.
+ */
+Real
+peak_around (Real epsilon, Real threshold, Real x)
+{
+  if (x < 0)
+    return 1.0;
+  return max (- epsilon * (x - threshold) / ((x + epsilon) * threshold), 0.0);
+}
 
-      if (i < 0)
-	i = s.length ();
+/*
+  0 at 0,  1 at standard_x, and increasing thereafter.
+ */
+Real
+convex_amplifier (Real standard_x, Real increase_factor, Real x)
+{
+  return (exp (increase_factor * x / standard_x) - 1.0) / (exp (increase_factor) - 1.0);
+}
 
-      rv.push (s.cut_string (0, i));
-      s = s.nomid_string (0, i);
+string
+camel_case_to_lisp_identifier (const string &in)
+{
+  vector<char> out;
+
+  /* don't add '-' before first character */
+  out.push_back (char (tolower (in[0])));
+
+  for (size_t inpos = 1; inpos < in.size (); inpos++)
+    {
+      if (isupper (in[inpos]))
+        out.push_back ('-');
+      out.push_back ( char (tolower (in[inpos])));
     }
 
-  return rv;
+  string result (&out[0], out.size ());
+  replace_all (&result, '_', '-');
+
+  return result;
 }