diff options
Diffstat (limited to 'libguile/vectors.h')
-rw-r--r-- | libguile/vectors.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libguile/vectors.h b/libguile/vectors.h index df4902c33..4692a6574 100644 --- a/libguile/vectors.h +++ b/libguile/vectors.h @@ -56,6 +56,16 @@ #define SCM_VELTS(x) ((SCM *)SCM_CDR(x)) #define SCM_SETVELTS SCM_SETCDR + + +/* + bit vectors + */ +#define SCM_BITVEC_REF(a, i) ((SCM_ASWORD(SCM_VELTS(a)[(i)/SCM_LONG_BIT]) & (1L<<((i)%SCM_LONG_BIT))) ? 1 : 0) +#define SCM_BITVEC_SET(a, i) SCM_ASWORD(SCM_VELTS(a)[(i)/SCM_LONG_BIT]) |= (1L<<((i)%SCM_LONG_BIT)) +#define SCM_BITVEC_CLR(a, i) SCM_ASWORD(SCM_VELTS(a)[(i)/SCM_LONG_BIT]) &= ~(1L<<((i)%SCM_LONG_BIT)) + + extern SCM scm_vector_set_length_x (SCM vect, SCM len); |