diff options
Diffstat (limited to 'src/pulsecore/bitset.c')
-rw-r--r-- | src/pulsecore/bitset.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/pulsecore/bitset.c b/src/pulsecore/bitset.c new file mode 100644 index 00000000..4beeb1cc --- /dev/null +++ b/src/pulsecore/bitset.c @@ -0,0 +1,67 @@ +/*** + 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. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <string.h> + +#include <pulse/xmalloc.h> + +#include "bitset.h" + +void pa_bitset_set(pa_bitset_t *b, unsigned k, pa_bool_t v) { + pa_assert(b); + + if (v) + b[k >> 5] |= 1 << (k & 31); + else + b[k >> 5] &= ~((uint32_t) (1 << (k & 31))); +} + +pa_bool_t pa_bitset_get(const pa_bitset_t *b, unsigned k) { + return !!(b[k >> 5] & (1 << (k & 31))); +} + +pa_bool_t pa_bitset_equals(const pa_bitset_t *b, unsigned n, ...) { + va_list ap; + pa_bitset_t *a; + pa_bool_t equal; + + a = pa_xnew0(pa_bitset_t, PA_BITSET_ELEMENTS(n)); + + va_start(ap, n); + for (;;) { + int j = va_arg(ap, int); + + if (j < 0) + break; + + pa_bitset_set(a, j, TRUE); + } + va_end(ap); + + equal = memcmp(a, b, PA_BITSET_SIZE(n)) == 0; + pa_xfree(a); + + return equal; +} |