diff options
| author | Vito Caputo <vcaputo@gnugeneration.com> | 2016-08-28 00:36:53 -0700 |
|---|---|---|
| committer | Vito Caputo <vcaputo@gnugeneration.com> | 2016-09-09 14:14:31 -0700 |
| commit | 4642216f70dd98134a79f9299b7ca4bc876649c7 (patch) | |
| tree | bdf9fd892bc54a2f2a678a9828c6af9d9fc8bed2 /src/libvmon/bitmap.h | |
| parent | e99f5ac1293a0ae1f498bc4c73c4c04e4edb8665 (diff) | |
*: refactor all the things
Long overdue house cleaning.
The addition of compositing/monitoring overlays in vwm3 pushed vwm well past
what is a reasonable size for a simple thousand line file. This is a first
step towards restoring sanity in the code, but no behavioral differences are
intended, this is mostly just shuffling around and organizing code.
I expect some performance regressions initially, follow-on commits will make
more improvements to that end as the dust settles.
Diffstat (limited to 'src/libvmon/bitmap.h')
| -rw-r--r-- | src/libvmon/bitmap.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/libvmon/bitmap.h b/src/libvmon/bitmap.h new file mode 100644 index 0000000..eacb97d --- /dev/null +++ b/src/libvmon/bitmap.h @@ -0,0 +1,15 @@ +#ifndef _BITMAP_H +#define _BITMAP_H + +/* simple implementation of general-purpose bitmap macros taken from the comp.lang.c FAQ */ + +#include <limits.h> /* for CHAR_BIT */ + +#define BITMASK(b) (1 << ((b) % CHAR_BIT)) +#define BITSLOT(b) ((b) / CHAR_BIT) +#define BITSET(a, b) ((a)[BITSLOT(b)] |= BITMASK(b)) +#define BITCLEAR(a, b) ((a)[BITSLOT(b)] &= ~BITMASK(b)) +#define BITTEST(a, b) ((a)[BITSLOT(b)] & BITMASK(b)) +#define BITNSLOTS(nb) ((nb + CHAR_BIT - 1) / CHAR_BIT) + +#endif |