add a bitset implementation

src/pulsecore/bitset.h

@@ -0,0 +1,37 @@
+#ifndef foopulsecorebitsethfoo
+#define foopulsecorebitsethfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2009 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <inttypes.h>
+#include <pulsecore/macro.h>
+
+#define PA_BITSET_ELEMENTS(n) (((n)+31)/32)
+#define PA_BITSET_SIZE(n) (PA_BITSET_ELEMENTS(n)*32)
+
+typedef uint32_t pa_bitset_t;
+
+void pa_bitset_set(pa_bitset_t *b, unsigned k, pa_bool_t v);
+pa_bool_t pa_bitset_get(const pa_bitset_t *b, unsigned k);
+pa_bool_t pa_bitset_equals(const pa_bitset_t *b, unsigned n, ...);
+
+#endif