source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include <math.h>
-#include "item.hh"
#include "misc.hh"
-#include "moment.hh"
+/*
+ Return the 2-log, rounded down
+*/
int
-intlog2(int d) {
- int i=0;
- while (!(d&1))
+intlog2 (int d)
+{
+ assert (d);
+ int i = 0;
+ while ((d != 1))
{
- d/= 2;
- i++;
+ d /= 2;
+ i++;
}
- assert (!(d/2));
+
+ 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);
}
-#if 1
-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);
+}
+
+
+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;
}
-#endif