/*
- 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@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"
-#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)
return log (x) / log (2.0);
}
-Array<String>
-split_string (String s, char c)
-{
- Array<String> rv;
- while (s.length ())
- {
- int i = s.index (c);
-
- if (i == 0)
- {
- s = s.nomid_string (0, 1);
- continue;
- }
-
- if (i < 0)
- i = s.length ();
-
- rv.push (s.cut_string (0, i));
- s = s.nomid_string (0, i);
- }
-
- return rv;
-}
-
-
Real
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)
+{
+ if (x < 0)
+ return 1.0;
+ 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 (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])));
+ }
+
+ string result (&out[0], out.size ());
+ replace_all (&result, '_', '-');
+
+ return result;
+}