Doc-es: various updates.

[lilypond.git] / lily / misc.cc

diff --git a/lily/misc.cc b/lily/misc.cc
index aa49a697a6e990bac32fc78e76cd3ace09dd66ef..6cafa2b50b3669fac258e5d2b1d3e51cdb737db1 100644 (file)
--- a/lily/misc.cc
+++ b/lily/misc.cc
@@ -1,32 +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--2006 Han-Wen Nienhuys <hanwen@xs4all.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"
+  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)
@@ -43,38 +37,43 @@ directed_round (Real f, Direction d)
     return ceil (f);
 }
 
-
-
 /*
    0 at threshold,  1 at 0, with 1/x falloff.
  */
 Real
-peak_around (Real epsilon,  Real threshold, Real x)
+peak_around (Real epsilon, Real threshold, Real x)
 {
   if (x < 0)
     return 1.0;
-  return max (- epsilon * (x - threshold) / ((x + epsilon)  * threshold), 0.0);
+  return max (- epsilon * (x - threshold) / ((x + epsilon) * threshold), 0.0);
 }
 
+/*
+  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);
+}
 
 string
-camel_case_to_lisp_identifier (string in)
+camel_case_to_lisp_identifier (const string &in)
 {
   vector<char> out;
-  
+
   /* don't add '-' before first character */
-  out.push_back (tolower (in[0]));
-    
+  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 (tolower (in[inpos]));
+        out.push_back ('-');
+      out.push_back ( char (tolower (in[inpos])));
     }
-  
+
   string result (&out[0], out.size ());
-  replace_all (result, '_', '-');
+  replace_all (&result, '_', '-');
 
   return result;
 }
-