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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 |