X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fmisc.cc;h=c64983d8642fd224cdd32392ec719e9281c384c5;hb=a276a19dc6bd57832db3107f2f2cbb04cb4677b6;hp=95d730b9e7a1069b454b03878c06da2dc1583159;hpb=b782f68f927fa02b3ea895dd1bd801082e5bda6e;p=lilypond.git

diff --git a/lily/misc.cc b/lily/misc.cc
index 95d730b9e7..c64983d864 100644
--- a/lily/misc.cc
+++ b/lily/misc.cc
@@ -3,36 +3,78 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-    Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
-#include "misc.hh"
 
-#include <math.h>
+#include "misc.hh"
 
 /*
-  Return the 2-log, rounded down 
- */
+  Return the 2-log, rounded down
+*/
 int
 intlog2 (int d)
 {
   assert (d);
-  int i=0;
-  while ((d != 1)) 
+  int i = 0;
+  while ((d != 1))
     {
       d /= 2;
       i++;
     }
-  
-  assert (! (d/2));
+
+  assert (! (d / 2));
   return i;
 }
 
 double
 log_2 (double x)
 {
-  return log (x)  /log (2.0);
+  return log (x) / log (2.0);
+}
+
+Real
+directed_round (Real f, Direction d)
+{
+  if (d < 0)
+    return floor (f);
+  else
+    return ceil (f);
+}
+
+
+
+/*
+   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);
+}
+
+
+string
+camel_case_to_lisp_identifier (string in)
+{
+  vector<char> out;
+  
+  /* don't add '-' before first character */
+  out.push_back (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]));
+    }
+  
+  string result (&out[0], out.size ());
+  replace_all (result, '_', '-');
+
+  return result;
 }
 
-