-#include <math.h>
+/*
+ misc.cc -- implement various stuff
-#include "item.hh"
-#include "misc.hh"
-#include "glob.hh"
-#include "moment.hh"
+ source file of the GNU LilyPond music typesetter
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
+*/
-// depreciated, see struct Duration*
-Moment
-wholes(int dur, int dots)
-{
- if (!dur)
- return 0;
- Moment f = Rational(1)/Moment(dur);
- Moment delta = f;
+#include "misc.hh"
- while (dots--) {
- delta /= 2.0;
- f += delta;
- }
- return f;
-}
+/*
+ Return the 2-log, rounded down
+*/
int
-intlog2(int d) {
- int i=0;
- while (!(d&1)) {
- d/= 2;
- i++;
+intlog2 (int d)
+{
+ assert (d);
+ int i = 0;
+ while ((d != 1))
+ {
+ d /= 2;
+ i++;
}
- assert(!(d/2));
- return i;
+
+ assert (! (d / 2));
+ return i;
}
double
-log_2(double x) {
- return log(x) /log(2.0);
+log_2 (double x)
+{
+ return log (x) / log (2.0);
}
-Interval
-itemlist_width(const Array<Item*> &its)
+Real
+directed_round (Real f, Direction d)
{
- Interval iv ;
- iv.set_empty();
-
- for (int j =0; j < its.size(); j++){
- iv.unite (its[j]->width());
+ 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);
+}
+
+/*
+ 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)
+{
+ 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]));
}
- return iv;
+
+ string result (&out[0], out.size ());
+ replace_all (result, '_', '-');
+
+ return result;
}