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authorGreg J. Badros <gjb@cs.washington.edu>2000-03-09 18:58:58 +0000
committerGreg J. Badros <gjb@cs.washington.edu>2000-03-09 18:58:58 +0000
commitc209c88e54d08a557a297836200e16e20355df02 (patch)
treedce0d672bc0a63be5f658c65269c9a4144da1c67 /libguile/vectors.h
parentdf8bb2dc3988d24c0f64bd2cc5fa01a31825d11a (diff)
downloadguile-c209c88e54d08a557a297836200e16e20355df02.tar.gz
*.[ch]: make a distinction between SCM as a generic
name for a Scheme object (now a void*), and SCM as 32 bit word for storing tags and immediates (now a long int). Introduced SCM_ASWORD and SCM_ASSCM for conversion. Fixed various dubious code in the process: arbiter.c (use macros), unif.c (scm_array_p),
Diffstat (limited to 'libguile/vectors.h')
-rw-r--r--libguile/vectors.h10
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);