#ifndef SCM_BYTEVECTORS_H
#define SCM_BYTEVECTORS_H
-/* Copyright (C) 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2009, 2011 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
/* R6RS bytevectors. */
+/* The size in words of the bytevector header (type tag and flags, length,
+ and pointer to the underlying buffer). */
+#define SCM_BYTEVECTOR_HEADER_SIZE 4U
+
#define SCM_BYTEVECTOR_LENGTH(_bv) \
- ((size_t) SCM_SMOB_DATA (_bv))
+ ((size_t) SCM_CELL_WORD_1 (_bv))
#define SCM_BYTEVECTOR_CONTENTS(_bv) \
- (SCM_BYTEVECTOR_INLINE_P (_bv) \
- ? (signed char *) SCM_SMOB_OBJECT_2_LOC (_bv) \
- : (signed char *) SCM_SMOB_DATA_2 (_bv))
+ ((signed char *) SCM_CELL_WORD_2 (_bv))
+#define SCM_BYTEVECTOR_PARENT(_bv) \
+ (SCM_CELL_OBJECT_3 (_bv))
SCM_API SCM scm_endianness_big;
\f
/* Internal API. */
-/* The threshold (in octets) under which bytevectors are stored "in-line",
- i.e., without allocating memory beside the SMOB itself (a double cell).
- This optimization is necessary since small bytevectors are expected to be
- common. */
-#define SCM_BYTEVECTOR_P(_bv) \
- SCM_SMOB_PREDICATE (scm_tc16_bytevector, _bv)
-#define SCM_F_BYTEVECTOR_INLINE 0x1
-#define SCM_BYTEVECTOR_INLINE_P(_bv) \
- (SCM_SMOB_FLAGS (_bv) & SCM_F_BYTEVECTOR_INLINE)
+#define SCM_BYTEVECTOR_P(x) \
+ (SCM_HAS_TYP7 (x, scm_tc7_bytevector))
+#define SCM_BYTEVECTOR_FLAGS(_bv) \
+ (SCM_CELL_TYPE (_bv) >> 7UL)
+#define SCM_SET_BYTEVECTOR_FLAGS(_bv, _f) \
+ SCM_SET_CELL_TYPE ((_bv), \
+ scm_tc7_bytevector | ((scm_t_bits)(_f) << 7UL))
+
+#define SCM_BYTEVECTOR_ELEMENT_TYPE(_bv) \
+ (SCM_BYTEVECTOR_FLAGS (_bv) & 0xffUL)
+#define SCM_BYTEVECTOR_CONTIGUOUS_P(_bv) \
+ (SCM_BYTEVECTOR_FLAGS (_bv) >> 8UL)
/* Hint that is passed to `scm_gc_malloc ()' and friends. */
#define SCM_GC_BYTEVECTOR "bytevector"
+SCM_INTERNAL SCM scm_i_make_typed_bytevector (size_t, scm_t_array_element_type);
+SCM_INTERNAL SCM scm_c_take_typed_bytevector (signed char *, size_t,
+ scm_t_array_element_type, SCM);
+
SCM_INTERNAL void scm_bootstrap_bytevectors (void);
SCM_INTERNAL void scm_init_bytevectors (void);
-SCM_INTERNAL scm_t_bits scm_tc16_bytevector;
SCM_INTERNAL SCM scm_i_native_endianness;
-SCM_INTERNAL SCM scm_c_take_bytevector (signed char *, size_t);
+SCM_INTERNAL SCM scm_c_take_gc_bytevector (signed char *, size_t, SCM);
-#define scm_c_shrink_bytevector(_bv, _len) \
- (SCM_BYTEVECTOR_INLINE_P (_bv) \
- ? (_bv) \
- : scm_i_shrink_bytevector ((_bv), (_len)))
+SCM_INTERNAL int scm_i_print_bytevector (SCM, SCM, scm_print_state *);
-SCM_INTERNAL SCM scm_i_shrink_bytevector (SCM, size_t);
+SCM_INTERNAL SCM scm_c_shrink_bytevector (SCM, size_t);
SCM_INTERNAL void scm_i_bytevector_generalized_set_x (SCM, size_t, SCM);
SCM_INTERNAL SCM scm_null_bytevector;