1 /* Copyright (C) 2009, 2010 Free Software Foundation, Inc.
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public License
5 * as published by the Free Software Foundation; either version 3 of
6 * the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
29 #include "libguile/_scm.h"
30 #include "libguile/extensions.h"
31 #include "libguile/bytevectors.h"
32 #include "libguile/strings.h"
33 #include "libguile/validate.h"
34 #include "libguile/ieee-754.h"
35 #include "libguile/arrays.h"
36 #include "libguile/array-handle.h"
37 #include "libguile/uniform.h"
38 #include "libguile/srfi-4.h"
41 #include <striconveh.h>
48 /* Assuming 32-bit longs. */
49 # define ULONG_MAX 4294967295UL
58 /* Convenience macros. These are used by the various templates (macros) that
59 are parameterized by integer signedness. */
60 #define INT8_T_signed scm_t_int8
61 #define INT8_T_unsigned scm_t_uint8
62 #define INT16_T_signed scm_t_int16
63 #define INT16_T_unsigned scm_t_uint16
64 #define INT32_T_signed scm_t_int32
65 #define INT32_T_unsigned scm_t_uint32
66 #define is_signed_int8(_x) (((_x) >= -128L) && ((_x) <= 127L))
67 #define is_unsigned_int8(_x) ((_x) <= 255UL)
68 #define is_signed_int16(_x) (((_x) >= -32768L) && ((_x) <= 32767L))
69 #define is_unsigned_int16(_x) ((_x) <= 65535UL)
70 #define is_signed_int32(_x) (((_x) >= -2147483648L) && ((_x) <= 2147483647L))
71 #define is_unsigned_int32(_x) ((_x) <= 4294967295UL)
72 #define SIGNEDNESS_signed 1
73 #define SIGNEDNESS_unsigned 0
75 #define INT_TYPE(_size, _sign) INT ## _size ## _T_ ## _sign
76 #define INT_SWAP(_size) bswap_ ## _size
77 #define INT_VALID_P(_size, _sign) is_ ## _sign ## _int ## _size
78 #define SIGNEDNESS(_sign) SIGNEDNESS_ ## _sign
81 #define INTEGER_ACCESSOR_PROLOGUE(_len, _sign) \
82 size_t c_len, c_index; \
85 SCM_VALIDATE_BYTEVECTOR (1, bv); \
86 c_index = scm_to_uint (index); \
88 c_len = SCM_BYTEVECTOR_LENGTH (bv); \
89 c_bv = (_sign char *) SCM_BYTEVECTOR_CONTENTS (bv); \
91 if (SCM_UNLIKELY (c_index + ((_len) >> 3UL) - 1 >= c_len)) \
92 scm_out_of_range (FUNC_NAME, index);
94 /* Template for fixed-size integer access (only 8, 16 or 32-bit). */
95 #define INTEGER_REF(_len, _sign) \
98 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
99 SCM_VALIDATE_SYMBOL (3, endianness); \
102 INT_TYPE (_len, _sign) c_result; \
104 memcpy (&c_result, &c_bv[c_index], (_len) / 8); \
105 if (!scm_is_eq (endianness, scm_i_native_endianness)) \
106 c_result = INT_SWAP (_len) (c_result); \
108 result = SCM_I_MAKINUM (c_result); \
113 /* Template for fixed-size integer access using the native endianness. */
114 #define INTEGER_NATIVE_REF(_len, _sign) \
117 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
120 INT_TYPE (_len, _sign) c_result; \
122 memcpy (&c_result, &c_bv[c_index], (_len) / 8); \
123 result = SCM_I_MAKINUM (c_result); \
128 /* Template for fixed-size integer modification (only 8, 16 or 32-bit). */
129 #define INTEGER_SET(_len, _sign) \
130 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
131 SCM_VALIDATE_SYMBOL (3, endianness); \
134 scm_t_signed_bits c_value; \
135 INT_TYPE (_len, _sign) c_value_short; \
137 if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \
138 scm_wrong_type_arg (FUNC_NAME, 3, value); \
140 c_value = SCM_I_INUM (value); \
141 if (SCM_UNLIKELY (!INT_VALID_P (_len, _sign) (c_value))) \
142 scm_out_of_range (FUNC_NAME, value); \
144 c_value_short = (INT_TYPE (_len, _sign)) c_value; \
145 if (!scm_is_eq (endianness, scm_i_native_endianness)) \
146 c_value_short = INT_SWAP (_len) (c_value_short); \
148 memcpy (&c_bv[c_index], &c_value_short, (_len) / 8); \
151 return SCM_UNSPECIFIED;
153 /* Template for fixed-size integer modification using the native
155 #define INTEGER_NATIVE_SET(_len, _sign) \
156 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
159 scm_t_signed_bits c_value; \
160 INT_TYPE (_len, _sign) c_value_short; \
162 if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \
163 scm_wrong_type_arg (FUNC_NAME, 3, value); \
165 c_value = SCM_I_INUM (value); \
166 if (SCM_UNLIKELY (!INT_VALID_P (_len, _sign) (c_value))) \
167 scm_out_of_range (FUNC_NAME, value); \
169 c_value_short = (INT_TYPE (_len, _sign)) c_value; \
171 memcpy (&c_bv[c_index], &c_value_short, (_len) / 8); \
174 return SCM_UNSPECIFIED;
178 /* Bytevector type. */
180 #define SCM_BYTEVECTOR_HEADER_BYTES \
181 (SCM_BYTEVECTOR_HEADER_SIZE * sizeof (SCM))
183 #define SCM_BYTEVECTOR_SET_LENGTH(_bv, _len) \
184 SCM_SET_CELL_WORD_1 ((_bv), (scm_t_bits) (_len))
185 #define SCM_BYTEVECTOR_SET_CONTENTS(_bv, _contents) \
186 SCM_SET_CELL_WORD_2 ((_bv), (scm_t_bits) (_contents))
187 #define SCM_BYTEVECTOR_SET_CONTIGUOUS_P(bv, contiguous_p) \
188 SCM_SET_BYTEVECTOR_FLAGS ((bv), \
189 SCM_BYTEVECTOR_ELEMENT_TYPE (bv) \
190 | ((contiguous_p) << 8UL))
192 #define SCM_BYTEVECTOR_SET_ELEMENT_TYPE(bv, hint) \
193 SCM_SET_BYTEVECTOR_FLAGS ((bv), \
195 | (SCM_BYTEVECTOR_CONTIGUOUS_P (bv) << 8UL))
196 #define SCM_BYTEVECTOR_TYPE_SIZE(var) \
197 (scm_i_array_element_type_sizes[SCM_BYTEVECTOR_ELEMENT_TYPE (var)]/8)
198 #define SCM_BYTEVECTOR_TYPED_LENGTH(var) \
199 (SCM_BYTEVECTOR_LENGTH (var) / SCM_BYTEVECTOR_TYPE_SIZE (var))
201 /* The empty bytevector. */
202 SCM scm_null_bytevector
= SCM_UNSPECIFIED
;
206 make_bytevector (size_t len
, scm_t_array_element_type element_type
)
211 if (SCM_UNLIKELY (element_type
> SCM_ARRAY_ELEMENT_TYPE_LAST
212 || scm_i_array_element_type_sizes
[element_type
] < 8
213 || len
>= (SCM_I_SIZE_MAX
214 / (scm_i_array_element_type_sizes
[element_type
]/8))))
215 /* This would be an internal Guile programming error */
218 if (SCM_UNLIKELY (len
== 0 && element_type
== SCM_ARRAY_ELEMENT_TYPE_VU8
219 && SCM_BYTEVECTOR_P (scm_null_bytevector
)))
220 ret
= scm_null_bytevector
;
223 signed char *contents
;
225 c_len
= len
* (scm_i_array_element_type_sizes
[element_type
] / 8);
227 contents
= scm_gc_malloc_pointerless (SCM_BYTEVECTOR_HEADER_BYTES
+ c_len
,
229 ret
= PTR2SCM (contents
);
230 contents
+= SCM_BYTEVECTOR_HEADER_BYTES
;
232 SCM_BYTEVECTOR_SET_LENGTH (ret
, c_len
);
233 SCM_BYTEVECTOR_SET_CONTENTS (ret
, contents
);
234 SCM_BYTEVECTOR_SET_CONTIGUOUS_P (ret
, 1);
235 SCM_BYTEVECTOR_SET_ELEMENT_TYPE (ret
, element_type
);
241 /* Return a bytevector of LEN elements of type ELEMENT_TYPE, with element
242 values taken from CONTENTS. Assume that the storage for CONTENTS will be
243 automatically reclaimed when it becomes unreachable. */
245 make_bytevector_from_buffer (size_t len
, void *contents
,
246 scm_t_array_element_type element_type
)
250 if (SCM_UNLIKELY (len
== 0))
251 ret
= make_bytevector (len
, element_type
);
256 ret
= PTR2SCM (scm_gc_malloc (SCM_BYTEVECTOR_HEADER_BYTES
,
259 c_len
= len
* (scm_i_array_element_type_sizes
[element_type
] / 8);
261 SCM_BYTEVECTOR_SET_LENGTH (ret
, c_len
);
262 SCM_BYTEVECTOR_SET_CONTENTS (ret
, contents
);
263 SCM_BYTEVECTOR_SET_CONTIGUOUS_P (ret
, 0);
264 SCM_BYTEVECTOR_SET_ELEMENT_TYPE (ret
, element_type
);
271 /* Return a new bytevector of size LEN octets. */
273 scm_c_make_bytevector (size_t len
)
275 return make_bytevector (len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
278 /* Return a new bytevector of size LEN elements. */
280 scm_i_make_typed_bytevector (size_t len
, scm_t_array_element_type element_type
)
282 return make_bytevector (len
, element_type
);
285 /* Return a bytevector of size LEN made up of CONTENTS. The area pointed to
286 by CONTENTS must have been allocated using `scm_gc_malloc ()'. */
288 scm_c_take_bytevector (signed char *contents
, size_t len
)
290 return make_bytevector_from_buffer (len
, contents
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
294 scm_c_take_typed_bytevector (signed char *contents
, size_t len
,
295 scm_t_array_element_type element_type
)
297 return make_bytevector_from_buffer (len
, contents
, element_type
);
300 /* Shrink BV to C_NEW_LEN (which is assumed to be smaller than its current
301 size) and return the new bytevector (possibly different from BV). */
303 scm_c_shrink_bytevector (SCM bv
, size_t c_new_len
)
308 if (SCM_UNLIKELY (c_new_len
% SCM_BYTEVECTOR_TYPE_SIZE (bv
)))
309 /* This would be an internal Guile programming error */
312 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
313 if (SCM_UNLIKELY (c_new_len
> c_len
))
316 SCM_BYTEVECTOR_SET_LENGTH (bv
, c_new_len
);
318 if (SCM_BYTEVECTOR_CONTIGUOUS_P (bv
))
319 new_bv
= PTR2SCM (scm_gc_realloc (SCM2PTR (bv
),
320 c_len
+ SCM_BYTEVECTOR_HEADER_BYTES
,
321 c_new_len
+ SCM_BYTEVECTOR_HEADER_BYTES
,
327 c_bv
= scm_gc_realloc (SCM_BYTEVECTOR_CONTENTS (bv
),
328 c_len
, c_new_len
, SCM_GC_BYTEVECTOR
);
329 SCM_BYTEVECTOR_SET_CONTENTS (bv
, c_bv
);
338 scm_is_bytevector (SCM obj
)
340 return SCM_BYTEVECTOR_P (obj
);
344 scm_c_bytevector_length (SCM bv
)
345 #define FUNC_NAME "scm_c_bytevector_length"
347 SCM_VALIDATE_BYTEVECTOR (1, bv
);
349 return SCM_BYTEVECTOR_LENGTH (bv
);
354 scm_c_bytevector_ref (SCM bv
, size_t index
)
355 #define FUNC_NAME "scm_c_bytevector_ref"
358 const scm_t_uint8
*c_bv
;
360 SCM_VALIDATE_BYTEVECTOR (1, bv
);
362 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
363 c_bv
= (scm_t_uint8
*) SCM_BYTEVECTOR_CONTENTS (bv
);
365 if (SCM_UNLIKELY (index
>= c_len
))
366 scm_out_of_range (FUNC_NAME
, scm_from_size_t (index
));
373 scm_c_bytevector_set_x (SCM bv
, size_t index
, scm_t_uint8 value
)
374 #define FUNC_NAME "scm_c_bytevector_set_x"
379 SCM_VALIDATE_BYTEVECTOR (1, bv
);
381 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
382 c_bv
= (scm_t_uint8
*) SCM_BYTEVECTOR_CONTENTS (bv
);
384 if (SCM_UNLIKELY (index
>= c_len
))
385 scm_out_of_range (FUNC_NAME
, scm_from_size_t (index
));
394 scm_i_print_bytevector (SCM bv
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
396 ssize_t ubnd
, inc
, i
;
397 scm_t_array_handle h
;
399 scm_array_get_handle (bv
, &h
);
401 scm_putc ('#', port
);
402 scm_write (scm_array_handle_element_type (&h
), port
);
403 scm_putc ('(', port
);
404 for (i
= h
.dims
[0].lbnd
, ubnd
= h
.dims
[0].ubnd
, inc
= h
.dims
[0].inc
;
408 scm_putc (' ', port
);
409 scm_write (scm_array_handle_ref (&h
, i
), port
);
411 scm_putc (')', port
);
417 /* General operations. */
419 SCM_SYMBOL (scm_sym_big
, "big");
420 SCM_SYMBOL (scm_sym_little
, "little");
422 SCM scm_endianness_big
, scm_endianness_little
;
424 /* Host endianness (a symbol). */
425 SCM scm_i_native_endianness
= SCM_UNSPECIFIED
;
429 # define bswap_24(_x) \
430 ((((_x) & 0xff0000) >> 16) | \
431 (((_x) & 0x00ff00)) | \
432 (((_x) & 0x0000ff) << 16))
436 SCM_DEFINE (scm_native_endianness
, "native-endianness", 0, 0, 0,
438 "Return a symbol denoting the machine's native endianness.")
439 #define FUNC_NAME s_scm_native_endianness
441 return scm_i_native_endianness
;
445 SCM_DEFINE (scm_bytevector_p
, "bytevector?", 1, 0, 0,
447 "Return true if @var{obj} is a bytevector.")
448 #define FUNC_NAME s_scm_bytevector_p
450 return scm_from_bool (scm_is_bytevector (obj
));
454 SCM_DEFINE (scm_make_bytevector
, "make-bytevector", 1, 1, 0,
456 "Return a newly allocated bytevector of @var{len} bytes, "
457 "optionally filled with @var{fill}.")
458 #define FUNC_NAME s_scm_make_bytevector
462 signed char c_fill
= '\0';
464 SCM_VALIDATE_UINT_COPY (1, len
, c_len
);
465 if (fill
!= SCM_UNDEFINED
)
469 value
= scm_to_int (fill
);
470 if (SCM_UNLIKELY ((value
< -128) || (value
> 255)))
471 scm_out_of_range (FUNC_NAME
, fill
);
472 c_fill
= (signed char) value
;
475 bv
= make_bytevector (c_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
476 if (fill
!= SCM_UNDEFINED
)
479 signed char *contents
;
481 contents
= SCM_BYTEVECTOR_CONTENTS (bv
);
482 for (i
= 0; i
< c_len
; i
++)
483 contents
[i
] = c_fill
;
490 SCM_DEFINE (scm_bytevector_length
, "bytevector-length", 1, 0, 0,
492 "Return the length (in bytes) of @var{bv}.")
493 #define FUNC_NAME s_scm_bytevector_length
495 return scm_from_uint (scm_c_bytevector_length (bv
));
499 SCM_DEFINE (scm_bytevector_eq_p
, "bytevector=?", 2, 0, 0,
501 "Return is @var{bv1} equals to @var{bv2}---i.e., if they "
502 "have the same length and contents.")
503 #define FUNC_NAME s_scm_bytevector_eq_p
505 SCM result
= SCM_BOOL_F
;
506 unsigned c_len1
, c_len2
;
508 SCM_VALIDATE_BYTEVECTOR (1, bv1
);
509 SCM_VALIDATE_BYTEVECTOR (2, bv2
);
511 c_len1
= SCM_BYTEVECTOR_LENGTH (bv1
);
512 c_len2
= SCM_BYTEVECTOR_LENGTH (bv2
);
514 if (c_len1
== c_len2
&& (SCM_BYTEVECTOR_ELEMENT_TYPE (bv1
)
515 == SCM_BYTEVECTOR_ELEMENT_TYPE (bv2
)))
517 signed char *c_bv1
, *c_bv2
;
519 c_bv1
= SCM_BYTEVECTOR_CONTENTS (bv1
);
520 c_bv2
= SCM_BYTEVECTOR_CONTENTS (bv2
);
522 result
= scm_from_bool (!memcmp (c_bv1
, c_bv2
, c_len1
));
529 SCM_DEFINE (scm_bytevector_fill_x
, "bytevector-fill!", 2, 0, 0,
531 "Fill bytevector @var{bv} with @var{fill}, a byte.")
532 #define FUNC_NAME s_scm_bytevector_fill_x
535 signed char *c_bv
, c_fill
;
537 SCM_VALIDATE_BYTEVECTOR (1, bv
);
538 c_fill
= scm_to_int8 (fill
);
540 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
541 c_bv
= SCM_BYTEVECTOR_CONTENTS (bv
);
543 for (i
= 0; i
< c_len
; i
++)
546 return SCM_UNSPECIFIED
;
550 SCM_DEFINE (scm_bytevector_copy_x
, "bytevector-copy!", 5, 0, 0,
551 (SCM source
, SCM source_start
, SCM target
, SCM target_start
,
553 "Copy @var{len} bytes from @var{source} into @var{target}, "
554 "starting reading from @var{source_start} (a positive index "
555 "within @var{source}) and start writing at "
556 "@var{target_start}.")
557 #define FUNC_NAME s_scm_bytevector_copy_x
559 unsigned c_len
, c_source_len
, c_target_len
;
560 unsigned c_source_start
, c_target_start
;
561 signed char *c_source
, *c_target
;
563 SCM_VALIDATE_BYTEVECTOR (1, source
);
564 SCM_VALIDATE_BYTEVECTOR (3, target
);
566 c_len
= scm_to_uint (len
);
567 c_source_start
= scm_to_uint (source_start
);
568 c_target_start
= scm_to_uint (target_start
);
570 c_source
= SCM_BYTEVECTOR_CONTENTS (source
);
571 c_target
= SCM_BYTEVECTOR_CONTENTS (target
);
572 c_source_len
= SCM_BYTEVECTOR_LENGTH (source
);
573 c_target_len
= SCM_BYTEVECTOR_LENGTH (target
);
575 if (SCM_UNLIKELY (c_source_start
+ c_len
> c_source_len
))
576 scm_out_of_range (FUNC_NAME
, source_start
);
577 if (SCM_UNLIKELY (c_target_start
+ c_len
> c_target_len
))
578 scm_out_of_range (FUNC_NAME
, target_start
);
580 memcpy (c_target
+ c_target_start
,
581 c_source
+ c_source_start
,
584 return SCM_UNSPECIFIED
;
588 SCM_DEFINE (scm_bytevector_copy
, "bytevector-copy", 1, 0, 0,
590 "Return a newly allocated copy of @var{bv}.")
591 #define FUNC_NAME s_scm_bytevector_copy
595 signed char *c_bv
, *c_copy
;
597 SCM_VALIDATE_BYTEVECTOR (1, bv
);
599 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
600 c_bv
= SCM_BYTEVECTOR_CONTENTS (bv
);
602 copy
= make_bytevector (c_len
, SCM_BYTEVECTOR_ELEMENT_TYPE (bv
));
603 c_copy
= SCM_BYTEVECTOR_CONTENTS (copy
);
604 memcpy (c_copy
, c_bv
, c_len
);
610 SCM_DEFINE (scm_uniform_array_to_bytevector
, "uniform-array->bytevector",
611 1, 0, 0, (SCM array
),
612 "Return a newly allocated bytevector whose contents\n"
613 "will be copied from the uniform array @var{array}.")
614 #define FUNC_NAME s_scm_uniform_array_to_bytevector
617 size_t len
, sz
, byte_len
;
618 scm_t_array_handle h
;
621 contents
= scm_array_contents (array
, SCM_BOOL_T
);
622 if (scm_is_false (contents
))
623 scm_wrong_type_arg_msg (FUNC_NAME
, 0, array
, "uniform contiguous array");
625 scm_array_get_handle (contents
, &h
);
626 assert (h
.base
== 0);
629 len
= h
.dims
->inc
* (h
.dims
->ubnd
- h
.dims
->lbnd
+ 1);
630 sz
= scm_array_handle_uniform_element_bit_size (&h
);
631 if (sz
>= 8 && ((sz
% 8) == 0))
632 byte_len
= len
* (sz
/ 8);
634 /* byte_len = ceil (len * sz / 8) */
635 byte_len
= (len
* sz
+ 7) / 8;
637 /* an internal guile error, really */
638 SCM_MISC_ERROR ("uniform elements larger than 8 bits must fill whole bytes", SCM_EOL
);
640 ret
= make_bytevector (byte_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
641 memcpy (SCM_BYTEVECTOR_CONTENTS (ret
), elts
, byte_len
);
643 scm_array_handle_release (&h
);
650 /* Operations on bytes and octets. */
652 SCM_DEFINE (scm_bytevector_u8_ref
, "bytevector-u8-ref", 2, 0, 0,
654 "Return the octet located at @var{index} in @var{bv}.")
655 #define FUNC_NAME s_scm_bytevector_u8_ref
657 INTEGER_NATIVE_REF (8, unsigned);
661 SCM_DEFINE (scm_bytevector_s8_ref
, "bytevector-s8-ref", 2, 0, 0,
663 "Return the byte located at @var{index} in @var{bv}.")
664 #define FUNC_NAME s_scm_bytevector_s8_ref
666 INTEGER_NATIVE_REF (8, signed);
670 SCM_DEFINE (scm_bytevector_u8_set_x
, "bytevector-u8-set!", 3, 0, 0,
671 (SCM bv
, SCM index
, SCM value
),
672 "Return the octet located at @var{index} in @var{bv}.")
673 #define FUNC_NAME s_scm_bytevector_u8_set_x
675 INTEGER_NATIVE_SET (8, unsigned);
679 SCM_DEFINE (scm_bytevector_s8_set_x
, "bytevector-s8-set!", 3, 0, 0,
680 (SCM bv
, SCM index
, SCM value
),
681 "Return the octet located at @var{index} in @var{bv}.")
682 #define FUNC_NAME s_scm_bytevector_s8_set_x
684 INTEGER_NATIVE_SET (8, signed);
688 #undef OCTET_ACCESSOR_PROLOGUE
691 SCM_DEFINE (scm_bytevector_to_u8_list
, "bytevector->u8-list", 1, 0, 0,
693 "Return a newly allocated list of octets containing the "
694 "contents of @var{bv}.")
695 #define FUNC_NAME s_scm_bytevector_to_u8_list
701 SCM_VALIDATE_BYTEVECTOR (1, bv
);
703 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
704 c_bv
= (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv
);
706 lst
= scm_make_list (scm_from_uint (c_len
), SCM_UNSPECIFIED
);
707 for (i
= 0, pair
= lst
;
709 i
++, pair
= SCM_CDR (pair
))
711 SCM_SETCAR (pair
, SCM_I_MAKINUM (c_bv
[i
]));
718 SCM_DEFINE (scm_u8_list_to_bytevector
, "u8-list->bytevector", 1, 0, 0,
720 "Turn @var{lst}, a list of octets, into a bytevector.")
721 #define FUNC_NAME s_scm_u8_list_to_bytevector
727 SCM_VALIDATE_LIST_COPYLEN (1, lst
, c_len
);
729 bv
= make_bytevector (c_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
730 c_bv
= (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv
);
732 for (i
= 0; i
< c_len
; lst
= SCM_CDR (lst
), i
++)
734 item
= SCM_CAR (lst
);
736 if (SCM_LIKELY (SCM_I_INUMP (item
)))
738 scm_t_signed_bits c_item
;
740 c_item
= SCM_I_INUM (item
);
741 if (SCM_LIKELY ((c_item
>= 0) && (c_item
< 256)))
742 c_bv
[i
] = (unsigned char) c_item
;
753 scm_wrong_type_arg (FUNC_NAME
, 1, item
);
759 /* Compute the two's complement of VALUE (a positive integer) on SIZE octets
760 using (2^(SIZE * 8) - VALUE). */
762 twos_complement (mpz_t value
, size_t size
)
764 unsigned long bit_count
;
766 /* We expect BIT_COUNT to fit in a unsigned long thanks to the range
767 checking on SIZE performed earlier. */
768 bit_count
= (unsigned long) size
<< 3UL;
770 if (SCM_LIKELY (bit_count
< sizeof (unsigned long)))
771 mpz_ui_sub (value
, 1UL << bit_count
, value
);
777 mpz_ui_pow_ui (max
, 2, bit_count
);
778 mpz_sub (value
, max
, value
);
784 bytevector_large_ref (const char *c_bv
, size_t c_size
, int signed_p
,
789 int c_endianness
, negative_p
= 0;
793 if (scm_is_eq (endianness
, scm_sym_big
))
794 negative_p
= c_bv
[0] & 0x80;
796 negative_p
= c_bv
[c_size
- 1] & 0x80;
799 c_endianness
= scm_is_eq (endianness
, scm_sym_big
) ? 1 : -1;
802 mpz_import (c_mpz
, 1 /* 1 word */, 1 /* word order doesn't matter */,
803 c_size
/* word is C_SIZE-byte long */,
805 0 /* nails */, c_bv
);
807 if (signed_p
&& negative_p
)
809 twos_complement (c_mpz
, c_size
);
810 mpz_neg (c_mpz
, c_mpz
);
813 result
= scm_from_mpz (c_mpz
);
814 mpz_clear (c_mpz
); /* FIXME: Needed? */
820 bytevector_large_set (char *c_bv
, size_t c_size
, int signed_p
,
821 SCM value
, SCM endianness
)
824 int c_endianness
, c_sign
, err
= 0;
826 c_endianness
= scm_is_eq (endianness
, scm_sym_big
) ? 1 : -1;
829 scm_to_mpz (value
, c_mpz
);
831 c_sign
= mpz_sgn (c_mpz
);
834 if (SCM_LIKELY (signed_p
))
836 mpz_neg (c_mpz
, c_mpz
);
837 twos_complement (c_mpz
, c_size
);
848 memset (c_bv
, 0, c_size
);
851 size_t word_count
, value_size
;
853 value_size
= (mpz_sizeinbase (c_mpz
, 2) + (8 * c_size
)) / (8 * c_size
);
854 if (SCM_UNLIKELY (value_size
> c_size
))
861 mpz_export (c_bv
, &word_count
, 1 /* word order doesn't matter */,
862 c_size
, c_endianness
,
863 0 /* nails */, c_mpz
);
864 if (SCM_UNLIKELY (word_count
!= 1))
865 /* Shouldn't happen since we already checked with VALUE_SIZE. */
875 #define GENERIC_INTEGER_ACCESSOR_PROLOGUE(_sign) \
876 unsigned long c_len, c_index, c_size; \
879 SCM_VALIDATE_BYTEVECTOR (1, bv); \
880 c_index = scm_to_ulong (index); \
881 c_size = scm_to_ulong (size); \
883 c_len = SCM_BYTEVECTOR_LENGTH (bv); \
884 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
886 /* C_SIZE must have its 3 higher bits set to zero so that \
887 multiplying it by 8 yields a number that fits in an \
889 if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \
890 scm_out_of_range (FUNC_NAME, size); \
891 if (SCM_UNLIKELY (c_index + c_size > c_len)) \
892 scm_out_of_range (FUNC_NAME, index);
895 /* Template of an integer reference function. */
896 #define GENERIC_INTEGER_REF(_sign) \
904 swap = !scm_is_eq (endianness, scm_i_native_endianness); \
909 _sign char c_value8; \
910 memcpy (&c_value8, c_bv, 1); \
916 INT_TYPE (16, _sign) c_value16; \
917 memcpy (&c_value16, c_bv, 2); \
919 value = (INT_TYPE (16, _sign)) bswap_16 (c_value16); \
928 result = SCM_I_MAKINUM ((_sign int) value); \
931 result = bytevector_large_ref ((char *) c_bv, \
932 c_size, SIGNEDNESS (_sign), \
938 bytevector_signed_ref (const char *c_bv
, size_t c_size
, SCM endianness
)
940 GENERIC_INTEGER_REF (signed);
944 bytevector_unsigned_ref (const char *c_bv
, size_t c_size
, SCM endianness
)
946 GENERIC_INTEGER_REF (unsigned);
950 /* Template of an integer assignment function. */
951 #define GENERIC_INTEGER_SET(_sign) \
954 scm_t_signed_bits c_value; \
956 if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \
959 c_value = SCM_I_INUM (value); \
963 if (SCM_LIKELY (INT_VALID_P (8, _sign) (c_value))) \
965 _sign char c_value8; \
966 c_value8 = (_sign char) c_value; \
967 memcpy (c_bv, &c_value8, 1); \
974 if (SCM_LIKELY (INT_VALID_P (16, _sign) (c_value))) \
977 INT_TYPE (16, _sign) c_value16; \
979 swap = !scm_is_eq (endianness, scm_i_native_endianness); \
982 c_value16 = (INT_TYPE (16, _sign)) bswap_16 (c_value); \
984 c_value16 = c_value; \
986 memcpy (c_bv, &c_value16, 2); \
1000 err = bytevector_large_set (c_bv, c_size, \
1001 SIGNEDNESS (_sign), \
1002 value, endianness); \
1010 scm_out_of_range (FUNC_NAME, value); \
1014 bytevector_signed_set (char *c_bv
, size_t c_size
,
1015 SCM value
, SCM endianness
,
1016 const char *func_name
)
1017 #define FUNC_NAME func_name
1019 GENERIC_INTEGER_SET (signed);
1024 bytevector_unsigned_set (char *c_bv
, size_t c_size
,
1025 SCM value
, SCM endianness
,
1026 const char *func_name
)
1027 #define FUNC_NAME func_name
1029 GENERIC_INTEGER_SET (unsigned);
1033 #undef GENERIC_INTEGER_SET
1034 #undef GENERIC_INTEGER_REF
1037 SCM_DEFINE (scm_bytevector_uint_ref
, "bytevector-uint-ref", 4, 0, 0,
1038 (SCM bv
, SCM index
, SCM endianness
, SCM size
),
1039 "Return the @var{size}-octet long unsigned integer at index "
1040 "@var{index} in @var{bv}.")
1041 #define FUNC_NAME s_scm_bytevector_uint_ref
1043 GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned);
1045 return (bytevector_unsigned_ref (&c_bv
[c_index
], c_size
, endianness
));
1049 SCM_DEFINE (scm_bytevector_sint_ref
, "bytevector-sint-ref", 4, 0, 0,
1050 (SCM bv
, SCM index
, SCM endianness
, SCM size
),
1051 "Return the @var{size}-octet long unsigned integer at index "
1052 "@var{index} in @var{bv}.")
1053 #define FUNC_NAME s_scm_bytevector_sint_ref
1055 GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed);
1057 return (bytevector_signed_ref (&c_bv
[c_index
], c_size
, endianness
));
1061 SCM_DEFINE (scm_bytevector_uint_set_x
, "bytevector-uint-set!", 5, 0, 0,
1062 (SCM bv
, SCM index
, SCM value
, SCM endianness
, SCM size
),
1063 "Set the @var{size}-octet long unsigned integer at @var{index} "
1065 #define FUNC_NAME s_scm_bytevector_uint_set_x
1067 GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned);
1069 bytevector_unsigned_set (&c_bv
[c_index
], c_size
, value
, endianness
,
1072 return SCM_UNSPECIFIED
;
1076 SCM_DEFINE (scm_bytevector_sint_set_x
, "bytevector-sint-set!", 5, 0, 0,
1077 (SCM bv
, SCM index
, SCM value
, SCM endianness
, SCM size
),
1078 "Set the @var{size}-octet long signed integer at @var{index} "
1080 #define FUNC_NAME s_scm_bytevector_sint_set_x
1082 GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed);
1084 bytevector_signed_set (&c_bv
[c_index
], c_size
, value
, endianness
,
1087 return SCM_UNSPECIFIED
;
1093 /* Operations on integers of arbitrary size. */
1095 #define INTEGERS_TO_LIST(_sign) \
1097 size_t i, c_len, c_size; \
1099 SCM_VALIDATE_BYTEVECTOR (1, bv); \
1100 SCM_VALIDATE_SYMBOL (2, endianness); \
1101 c_size = scm_to_uint (size); \
1103 c_len = SCM_BYTEVECTOR_LENGTH (bv); \
1104 if (SCM_UNLIKELY (c_len == 0)) \
1106 else if (SCM_UNLIKELY (c_len < c_size)) \
1107 scm_out_of_range (FUNC_NAME, size); \
1112 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
1114 lst = scm_make_list (scm_from_uint (c_len / c_size), \
1116 for (i = 0, pair = lst; \
1117 i <= c_len - c_size; \
1118 i += c_size, c_bv += c_size, pair = SCM_CDR (pair)) \
1121 bytevector_ ## _sign ## _ref (c_bv, c_size, \
1128 SCM_DEFINE (scm_bytevector_to_sint_list
, "bytevector->sint-list",
1130 (SCM bv
, SCM endianness
, SCM size
),
1131 "Return a list of signed integers of @var{size} octets "
1132 "representing the contents of @var{bv}.")
1133 #define FUNC_NAME s_scm_bytevector_to_sint_list
1135 INTEGERS_TO_LIST (signed);
1139 SCM_DEFINE (scm_bytevector_to_uint_list
, "bytevector->uint-list",
1141 (SCM bv
, SCM endianness
, SCM size
),
1142 "Return a list of unsigned integers of @var{size} octets "
1143 "representing the contents of @var{bv}.")
1144 #define FUNC_NAME s_scm_bytevector_to_uint_list
1146 INTEGERS_TO_LIST (unsigned);
1150 #undef INTEGER_TO_LIST
1153 #define INTEGER_LIST_TO_BYTEVECTOR(_sign) \
1157 char *c_bv, *c_bv_ptr; \
1159 SCM_VALIDATE_LIST_COPYLEN (1, lst, c_len); \
1160 SCM_VALIDATE_SYMBOL (2, endianness); \
1161 c_size = scm_to_uint (size); \
1163 if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \
1164 scm_out_of_range (FUNC_NAME, size); \
1166 bv = make_bytevector (c_len * c_size, SCM_ARRAY_ELEMENT_TYPE_VU8); \
1167 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
1169 for (c_bv_ptr = c_bv; \
1170 !scm_is_null (lst); \
1171 lst = SCM_CDR (lst), c_bv_ptr += c_size) \
1173 bytevector_ ## _sign ## _set (c_bv_ptr, c_size, \
1174 SCM_CAR (lst), endianness, \
1181 SCM_DEFINE (scm_uint_list_to_bytevector
, "uint-list->bytevector",
1183 (SCM lst
, SCM endianness
, SCM size
),
1184 "Return a bytevector containing the unsigned integers "
1185 "listed in @var{lst} and encoded on @var{size} octets "
1186 "according to @var{endianness}.")
1187 #define FUNC_NAME s_scm_uint_list_to_bytevector
1189 INTEGER_LIST_TO_BYTEVECTOR (unsigned);
1193 SCM_DEFINE (scm_sint_list_to_bytevector
, "sint-list->bytevector",
1195 (SCM lst
, SCM endianness
, SCM size
),
1196 "Return a bytevector containing the signed integers "
1197 "listed in @var{lst} and encoded on @var{size} octets "
1198 "according to @var{endianness}.")
1199 #define FUNC_NAME s_scm_sint_list_to_bytevector
1201 INTEGER_LIST_TO_BYTEVECTOR (signed);
1205 #undef INTEGER_LIST_TO_BYTEVECTOR
1209 /* Operations on 16-bit integers. */
1211 SCM_DEFINE (scm_bytevector_u16_ref
, "bytevector-u16-ref",
1213 (SCM bv
, SCM index
, SCM endianness
),
1214 "Return the unsigned 16-bit integer from @var{bv} at "
1216 #define FUNC_NAME s_scm_bytevector_u16_ref
1218 INTEGER_REF (16, unsigned);
1222 SCM_DEFINE (scm_bytevector_s16_ref
, "bytevector-s16-ref",
1224 (SCM bv
, SCM index
, SCM endianness
),
1225 "Return the signed 16-bit integer from @var{bv} at "
1227 #define FUNC_NAME s_scm_bytevector_s16_ref
1229 INTEGER_REF (16, signed);
1233 SCM_DEFINE (scm_bytevector_u16_native_ref
, "bytevector-u16-native-ref",
1235 (SCM bv
, SCM index
),
1236 "Return the unsigned 16-bit integer from @var{bv} at "
1237 "@var{index} using the native endianness.")
1238 #define FUNC_NAME s_scm_bytevector_u16_native_ref
1240 INTEGER_NATIVE_REF (16, unsigned);
1244 SCM_DEFINE (scm_bytevector_s16_native_ref
, "bytevector-s16-native-ref",
1246 (SCM bv
, SCM index
),
1247 "Return the unsigned 16-bit integer from @var{bv} at "
1248 "@var{index} using the native endianness.")
1249 #define FUNC_NAME s_scm_bytevector_s16_native_ref
1251 INTEGER_NATIVE_REF (16, signed);
1255 SCM_DEFINE (scm_bytevector_u16_set_x
, "bytevector-u16-set!",
1257 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1258 "Store @var{value} in @var{bv} at @var{index} according to "
1259 "@var{endianness}.")
1260 #define FUNC_NAME s_scm_bytevector_u16_set_x
1262 INTEGER_SET (16, unsigned);
1266 SCM_DEFINE (scm_bytevector_s16_set_x
, "bytevector-s16-set!",
1268 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1269 "Store @var{value} in @var{bv} at @var{index} according to "
1270 "@var{endianness}.")
1271 #define FUNC_NAME s_scm_bytevector_s16_set_x
1273 INTEGER_SET (16, signed);
1277 SCM_DEFINE (scm_bytevector_u16_native_set_x
, "bytevector-u16-native-set!",
1279 (SCM bv
, SCM index
, SCM value
),
1280 "Store the unsigned integer @var{value} at index @var{index} "
1281 "of @var{bv} using the native endianness.")
1282 #define FUNC_NAME s_scm_bytevector_u16_native_set_x
1284 INTEGER_NATIVE_SET (16, unsigned);
1288 SCM_DEFINE (scm_bytevector_s16_native_set_x
, "bytevector-s16-native-set!",
1290 (SCM bv
, SCM index
, SCM value
),
1291 "Store the signed integer @var{value} at index @var{index} "
1292 "of @var{bv} using the native endianness.")
1293 #define FUNC_NAME s_scm_bytevector_s16_native_set_x
1295 INTEGER_NATIVE_SET (16, signed);
1301 /* Operations on 32-bit integers. */
1303 /* Unfortunately, on 32-bit machines `SCM' is not large enough to hold
1304 arbitrary 32-bit integers. Thus we fall back to using the
1305 `large_{ref,set}' variants on 32-bit machines. */
1307 #define LARGE_INTEGER_REF(_len, _sign) \
1308 INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \
1309 SCM_VALIDATE_SYMBOL (3, endianness); \
1311 return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \
1312 SIGNEDNESS (_sign), endianness));
1314 #define LARGE_INTEGER_SET(_len, _sign) \
1316 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
1317 SCM_VALIDATE_SYMBOL (4, endianness); \
1319 err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \
1320 SIGNEDNESS (_sign), value, endianness); \
1321 if (SCM_UNLIKELY (err)) \
1322 scm_out_of_range (FUNC_NAME, value); \
1324 return SCM_UNSPECIFIED;
1326 #define LARGE_INTEGER_NATIVE_REF(_len, _sign) \
1327 INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \
1328 return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \
1329 SIGNEDNESS (_sign), scm_i_native_endianness));
1331 #define LARGE_INTEGER_NATIVE_SET(_len, _sign) \
1333 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
1335 err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \
1336 SIGNEDNESS (_sign), value, \
1337 scm_i_native_endianness); \
1338 if (SCM_UNLIKELY (err)) \
1339 scm_out_of_range (FUNC_NAME, value); \
1341 return SCM_UNSPECIFIED;
1344 SCM_DEFINE (scm_bytevector_u32_ref
, "bytevector-u32-ref",
1346 (SCM bv
, SCM index
, SCM endianness
),
1347 "Return the unsigned 32-bit integer from @var{bv} at "
1349 #define FUNC_NAME s_scm_bytevector_u32_ref
1351 #if SIZEOF_VOID_P > 4
1352 INTEGER_REF (32, unsigned);
1354 LARGE_INTEGER_REF (32, unsigned);
1359 SCM_DEFINE (scm_bytevector_s32_ref
, "bytevector-s32-ref",
1361 (SCM bv
, SCM index
, SCM endianness
),
1362 "Return the signed 32-bit integer from @var{bv} at "
1364 #define FUNC_NAME s_scm_bytevector_s32_ref
1366 #if SIZEOF_VOID_P > 4
1367 INTEGER_REF (32, signed);
1369 LARGE_INTEGER_REF (32, signed);
1374 SCM_DEFINE (scm_bytevector_u32_native_ref
, "bytevector-u32-native-ref",
1376 (SCM bv
, SCM index
),
1377 "Return the unsigned 32-bit integer from @var{bv} at "
1378 "@var{index} using the native endianness.")
1379 #define FUNC_NAME s_scm_bytevector_u32_native_ref
1381 #if SIZEOF_VOID_P > 4
1382 INTEGER_NATIVE_REF (32, unsigned);
1384 LARGE_INTEGER_NATIVE_REF (32, unsigned);
1389 SCM_DEFINE (scm_bytevector_s32_native_ref
, "bytevector-s32-native-ref",
1391 (SCM bv
, SCM index
),
1392 "Return the unsigned 32-bit integer from @var{bv} at "
1393 "@var{index} using the native endianness.")
1394 #define FUNC_NAME s_scm_bytevector_s32_native_ref
1396 #if SIZEOF_VOID_P > 4
1397 INTEGER_NATIVE_REF (32, signed);
1399 LARGE_INTEGER_NATIVE_REF (32, signed);
1404 SCM_DEFINE (scm_bytevector_u32_set_x
, "bytevector-u32-set!",
1406 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1407 "Store @var{value} in @var{bv} at @var{index} according to "
1408 "@var{endianness}.")
1409 #define FUNC_NAME s_scm_bytevector_u32_set_x
1411 #if SIZEOF_VOID_P > 4
1412 INTEGER_SET (32, unsigned);
1414 LARGE_INTEGER_SET (32, unsigned);
1419 SCM_DEFINE (scm_bytevector_s32_set_x
, "bytevector-s32-set!",
1421 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1422 "Store @var{value} in @var{bv} at @var{index} according to "
1423 "@var{endianness}.")
1424 #define FUNC_NAME s_scm_bytevector_s32_set_x
1426 #if SIZEOF_VOID_P > 4
1427 INTEGER_SET (32, signed);
1429 LARGE_INTEGER_SET (32, signed);
1434 SCM_DEFINE (scm_bytevector_u32_native_set_x
, "bytevector-u32-native-set!",
1436 (SCM bv
, SCM index
, SCM value
),
1437 "Store the unsigned integer @var{value} at index @var{index} "
1438 "of @var{bv} using the native endianness.")
1439 #define FUNC_NAME s_scm_bytevector_u32_native_set_x
1441 #if SIZEOF_VOID_P > 4
1442 INTEGER_NATIVE_SET (32, unsigned);
1444 LARGE_INTEGER_NATIVE_SET (32, unsigned);
1449 SCM_DEFINE (scm_bytevector_s32_native_set_x
, "bytevector-s32-native-set!",
1451 (SCM bv
, SCM index
, SCM value
),
1452 "Store the signed integer @var{value} at index @var{index} "
1453 "of @var{bv} using the native endianness.")
1454 #define FUNC_NAME s_scm_bytevector_s32_native_set_x
1456 #if SIZEOF_VOID_P > 4
1457 INTEGER_NATIVE_SET (32, signed);
1459 LARGE_INTEGER_NATIVE_SET (32, signed);
1466 /* Operations on 64-bit integers. */
1468 /* For 64-bit integers, we use only the `large_{ref,set}' variant. */
1470 SCM_DEFINE (scm_bytevector_u64_ref
, "bytevector-u64-ref",
1472 (SCM bv
, SCM index
, SCM endianness
),
1473 "Return the unsigned 64-bit integer from @var{bv} at "
1475 #define FUNC_NAME s_scm_bytevector_u64_ref
1477 LARGE_INTEGER_REF (64, unsigned);
1481 SCM_DEFINE (scm_bytevector_s64_ref
, "bytevector-s64-ref",
1483 (SCM bv
, SCM index
, SCM endianness
),
1484 "Return the signed 64-bit integer from @var{bv} at "
1486 #define FUNC_NAME s_scm_bytevector_s64_ref
1488 LARGE_INTEGER_REF (64, signed);
1492 SCM_DEFINE (scm_bytevector_u64_native_ref
, "bytevector-u64-native-ref",
1494 (SCM bv
, SCM index
),
1495 "Return the unsigned 64-bit integer from @var{bv} at "
1496 "@var{index} using the native endianness.")
1497 #define FUNC_NAME s_scm_bytevector_u64_native_ref
1499 LARGE_INTEGER_NATIVE_REF (64, unsigned);
1503 SCM_DEFINE (scm_bytevector_s64_native_ref
, "bytevector-s64-native-ref",
1505 (SCM bv
, SCM index
),
1506 "Return the unsigned 64-bit integer from @var{bv} at "
1507 "@var{index} using the native endianness.")
1508 #define FUNC_NAME s_scm_bytevector_s64_native_ref
1510 LARGE_INTEGER_NATIVE_REF (64, signed);
1514 SCM_DEFINE (scm_bytevector_u64_set_x
, "bytevector-u64-set!",
1516 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1517 "Store @var{value} in @var{bv} at @var{index} according to "
1518 "@var{endianness}.")
1519 #define FUNC_NAME s_scm_bytevector_u64_set_x
1521 LARGE_INTEGER_SET (64, unsigned);
1525 SCM_DEFINE (scm_bytevector_s64_set_x
, "bytevector-s64-set!",
1527 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1528 "Store @var{value} in @var{bv} at @var{index} according to "
1529 "@var{endianness}.")
1530 #define FUNC_NAME s_scm_bytevector_s64_set_x
1532 LARGE_INTEGER_SET (64, signed);
1536 SCM_DEFINE (scm_bytevector_u64_native_set_x
, "bytevector-u64-native-set!",
1538 (SCM bv
, SCM index
, SCM value
),
1539 "Store the unsigned integer @var{value} at index @var{index} "
1540 "of @var{bv} using the native endianness.")
1541 #define FUNC_NAME s_scm_bytevector_u64_native_set_x
1543 LARGE_INTEGER_NATIVE_SET (64, unsigned);
1547 SCM_DEFINE (scm_bytevector_s64_native_set_x
, "bytevector-s64-native-set!",
1549 (SCM bv
, SCM index
, SCM value
),
1550 "Store the signed integer @var{value} at index @var{index} "
1551 "of @var{bv} using the native endianness.")
1552 #define FUNC_NAME s_scm_bytevector_s64_native_set_x
1554 LARGE_INTEGER_NATIVE_SET (64, signed);
1560 /* Operations on IEEE-754 numbers. */
1562 /* There are two possible word endians, visible in glibc's <ieee754.h>.
1563 However, in R6RS, when the endianness is `little', little endian is
1564 assumed for both the byte order and the word order. This is clear from
1565 Section 2.1 of R6RS-lib (in response to
1566 http://www.r6rs.org/formal-comments/comment-187.txt). */
1569 /* Convert to/from a floating-point number with different endianness. This
1570 method is probably not the most efficient but it should be portable. */
1573 float_to_foreign_endianness (union scm_ieee754_float
*target
,
1576 union scm_ieee754_float src
;
1580 #ifdef WORDS_BIGENDIAN
1581 /* Assuming little endian for both byte and word order. */
1582 target
->little_endian
.negative
= src
.big_endian
.negative
;
1583 target
->little_endian
.exponent
= src
.big_endian
.exponent
;
1584 target
->little_endian
.mantissa
= src
.big_endian
.mantissa
;
1586 target
->big_endian
.negative
= src
.little_endian
.negative
;
1587 target
->big_endian
.exponent
= src
.little_endian
.exponent
;
1588 target
->big_endian
.mantissa
= src
.little_endian
.mantissa
;
1593 float_from_foreign_endianness (const union scm_ieee754_float
*source
)
1595 union scm_ieee754_float result
;
1597 #ifdef WORDS_BIGENDIAN
1598 /* Assuming little endian for both byte and word order. */
1599 result
.big_endian
.negative
= source
->little_endian
.negative
;
1600 result
.big_endian
.exponent
= source
->little_endian
.exponent
;
1601 result
.big_endian
.mantissa
= source
->little_endian
.mantissa
;
1603 result
.little_endian
.negative
= source
->big_endian
.negative
;
1604 result
.little_endian
.exponent
= source
->big_endian
.exponent
;
1605 result
.little_endian
.mantissa
= source
->big_endian
.mantissa
;
1612 double_to_foreign_endianness (union scm_ieee754_double
*target
,
1615 union scm_ieee754_double src
;
1619 #ifdef WORDS_BIGENDIAN
1620 /* Assuming little endian for both byte and word order. */
1621 target
->little_little_endian
.negative
= src
.big_endian
.negative
;
1622 target
->little_little_endian
.exponent
= src
.big_endian
.exponent
;
1623 target
->little_little_endian
.mantissa0
= src
.big_endian
.mantissa0
;
1624 target
->little_little_endian
.mantissa1
= src
.big_endian
.mantissa1
;
1626 target
->big_endian
.negative
= src
.little_little_endian
.negative
;
1627 target
->big_endian
.exponent
= src
.little_little_endian
.exponent
;
1628 target
->big_endian
.mantissa0
= src
.little_little_endian
.mantissa0
;
1629 target
->big_endian
.mantissa1
= src
.little_little_endian
.mantissa1
;
1633 static inline double
1634 double_from_foreign_endianness (const union scm_ieee754_double
*source
)
1636 union scm_ieee754_double result
;
1638 #ifdef WORDS_BIGENDIAN
1639 /* Assuming little endian for both byte and word order. */
1640 result
.big_endian
.negative
= source
->little_little_endian
.negative
;
1641 result
.big_endian
.exponent
= source
->little_little_endian
.exponent
;
1642 result
.big_endian
.mantissa0
= source
->little_little_endian
.mantissa0
;
1643 result
.big_endian
.mantissa1
= source
->little_little_endian
.mantissa1
;
1645 result
.little_little_endian
.negative
= source
->big_endian
.negative
;
1646 result
.little_little_endian
.exponent
= source
->big_endian
.exponent
;
1647 result
.little_little_endian
.mantissa0
= source
->big_endian
.mantissa0
;
1648 result
.little_little_endian
.mantissa1
= source
->big_endian
.mantissa1
;
1654 /* Template macros to abstract over doubles and floats.
1655 XXX: Guile can only convert to/from doubles. */
1656 #define IEEE754_UNION(_c_type) union scm_ieee754_ ## _c_type
1657 #define IEEE754_TO_SCM(_c_type) scm_from_double
1658 #define IEEE754_FROM_SCM(_c_type) scm_to_double
1659 #define IEEE754_FROM_FOREIGN_ENDIANNESS(_c_type) \
1660 _c_type ## _from_foreign_endianness
1661 #define IEEE754_TO_FOREIGN_ENDIANNESS(_c_type) \
1662 _c_type ## _to_foreign_endianness
1665 /* FIXME: SCM_VALIDATE_REAL rejects integers, etc. grrr */
1666 #define VALIDATE_REAL(pos, v) \
1668 SCM_ASSERT_TYPE (scm_is_true (scm_rational_p (v)), v, pos, FUNC_NAME, "real"); \
1671 /* Templace getters and setters. */
1673 #define IEEE754_ACCESSOR_PROLOGUE(_type) \
1674 INTEGER_ACCESSOR_PROLOGUE (sizeof (_type) << 3UL, signed);
1676 #define IEEE754_REF(_type) \
1679 IEEE754_ACCESSOR_PROLOGUE (_type); \
1680 SCM_VALIDATE_SYMBOL (3, endianness); \
1682 if (scm_is_eq (endianness, scm_i_native_endianness)) \
1683 memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \
1686 IEEE754_UNION (_type) c_raw; \
1688 memcpy (&c_raw, &c_bv[c_index], sizeof (c_raw)); \
1690 IEEE754_FROM_FOREIGN_ENDIANNESS (_type) (&c_raw); \
1693 return (IEEE754_TO_SCM (_type) (c_result));
1695 #define IEEE754_NATIVE_REF(_type) \
1698 IEEE754_ACCESSOR_PROLOGUE (_type); \
1700 memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \
1701 return (IEEE754_TO_SCM (_type) (c_result));
1703 #define IEEE754_SET(_type) \
1706 IEEE754_ACCESSOR_PROLOGUE (_type); \
1707 VALIDATE_REAL (3, value); \
1708 SCM_VALIDATE_SYMBOL (4, endianness); \
1709 c_value = IEEE754_FROM_SCM (_type) (value); \
1711 if (scm_is_eq (endianness, scm_i_native_endianness)) \
1712 memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \
1715 IEEE754_UNION (_type) c_raw; \
1717 IEEE754_TO_FOREIGN_ENDIANNESS (_type) (&c_raw, c_value); \
1718 memcpy (&c_bv[c_index], &c_raw, sizeof (c_raw)); \
1721 return SCM_UNSPECIFIED;
1723 #define IEEE754_NATIVE_SET(_type) \
1726 IEEE754_ACCESSOR_PROLOGUE (_type); \
1727 VALIDATE_REAL (3, value); \
1728 c_value = IEEE754_FROM_SCM (_type) (value); \
1730 memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \
1731 return SCM_UNSPECIFIED;
1734 /* Single precision. */
1736 SCM_DEFINE (scm_bytevector_ieee_single_ref
,
1737 "bytevector-ieee-single-ref",
1739 (SCM bv
, SCM index
, SCM endianness
),
1740 "Return the IEEE-754 single from @var{bv} at "
1742 #define FUNC_NAME s_scm_bytevector_ieee_single_ref
1744 IEEE754_REF (float);
1748 SCM_DEFINE (scm_bytevector_ieee_single_native_ref
,
1749 "bytevector-ieee-single-native-ref",
1751 (SCM bv
, SCM index
),
1752 "Return the IEEE-754 single from @var{bv} at "
1753 "@var{index} using the native endianness.")
1754 #define FUNC_NAME s_scm_bytevector_ieee_single_native_ref
1756 IEEE754_NATIVE_REF (float);
1760 SCM_DEFINE (scm_bytevector_ieee_single_set_x
,
1761 "bytevector-ieee-single-set!",
1763 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1764 "Store real @var{value} in @var{bv} at @var{index} according to "
1765 "@var{endianness}.")
1766 #define FUNC_NAME s_scm_bytevector_ieee_single_set_x
1768 IEEE754_SET (float);
1772 SCM_DEFINE (scm_bytevector_ieee_single_native_set_x
,
1773 "bytevector-ieee-single-native-set!",
1775 (SCM bv
, SCM index
, SCM value
),
1776 "Store the real @var{value} at index @var{index} "
1777 "of @var{bv} using the native endianness.")
1778 #define FUNC_NAME s_scm_bytevector_ieee_single_native_set_x
1780 IEEE754_NATIVE_SET (float);
1785 /* Double precision. */
1787 SCM_DEFINE (scm_bytevector_ieee_double_ref
,
1788 "bytevector-ieee-double-ref",
1790 (SCM bv
, SCM index
, SCM endianness
),
1791 "Return the IEEE-754 double from @var{bv} at "
1793 #define FUNC_NAME s_scm_bytevector_ieee_double_ref
1795 IEEE754_REF (double);
1799 SCM_DEFINE (scm_bytevector_ieee_double_native_ref
,
1800 "bytevector-ieee-double-native-ref",
1802 (SCM bv
, SCM index
),
1803 "Return the IEEE-754 double from @var{bv} at "
1804 "@var{index} using the native endianness.")
1805 #define FUNC_NAME s_scm_bytevector_ieee_double_native_ref
1807 IEEE754_NATIVE_REF (double);
1811 SCM_DEFINE (scm_bytevector_ieee_double_set_x
,
1812 "bytevector-ieee-double-set!",
1814 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1815 "Store real @var{value} in @var{bv} at @var{index} according to "
1816 "@var{endianness}.")
1817 #define FUNC_NAME s_scm_bytevector_ieee_double_set_x
1819 IEEE754_SET (double);
1823 SCM_DEFINE (scm_bytevector_ieee_double_native_set_x
,
1824 "bytevector-ieee-double-native-set!",
1826 (SCM bv
, SCM index
, SCM value
),
1827 "Store the real @var{value} at index @var{index} "
1828 "of @var{bv} using the native endianness.")
1829 #define FUNC_NAME s_scm_bytevector_ieee_double_native_set_x
1831 IEEE754_NATIVE_SET (double);
1836 #undef IEEE754_UNION
1837 #undef IEEE754_TO_SCM
1838 #undef IEEE754_FROM_SCM
1839 #undef IEEE754_FROM_FOREIGN_ENDIANNESS
1840 #undef IEEE754_TO_FOREIGN_ENDIANNESS
1842 #undef IEEE754_NATIVE_REF
1844 #undef IEEE754_NATIVE_SET
1847 /* Operations on strings. */
1850 /* Produce a function that returns the length of a UTF-encoded string. */
1851 #define UTF_STRLEN_FUNCTION(_utf_width) \
1852 static inline size_t \
1853 utf ## _utf_width ## _strlen (const uint ## _utf_width ## _t *str) \
1856 const uint ## _utf_width ## _t *ptr; \
1864 return (len * ((_utf_width) / 8)); \
1867 UTF_STRLEN_FUNCTION (8)
1870 /* Return the length (in bytes) of STR, a UTF-(UTF_WIDTH) encoded string. */
1871 #define UTF_STRLEN(_utf_width, _str) \
1872 utf ## _utf_width ## _strlen (_str)
1874 /* Return the "portable" name of the UTF encoding of size UTF_WIDTH and
1875 ENDIANNESS (Gnulib's `iconv_open' module guarantees the portability of the
1878 utf_encoding_name (char *name
, size_t utf_width
, SCM endianness
)
1880 strcpy (name
, "UTF-");
1881 strcat (name
, ((utf_width
== 8)
1883 : ((utf_width
== 16)
1885 : ((utf_width
== 32)
1889 ((scm_is_eq (endianness
, scm_sym_big
))
1891 : ((scm_is_eq (endianness
, scm_sym_little
))
1896 /* Maximum length of a UTF encoding name. */
1897 #define MAX_UTF_ENCODING_NAME_LEN 16
1899 /* Produce the body of a `string->utf' function. */
1900 #define STRING_TO_UTF(_utf_width) \
1903 char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \
1904 char *c_utf = NULL; \
1905 size_t c_strlen, c_utf_len = 0; \
1907 SCM_VALIDATE_STRING (1, str); \
1908 if (endianness == SCM_UNDEFINED) \
1909 endianness = scm_sym_big; \
1911 SCM_VALIDATE_SYMBOL (2, endianness); \
1913 utf_encoding_name (c_utf_name, (_utf_width), endianness); \
1915 c_strlen = scm_i_string_length (str); \
1916 if (scm_i_is_narrow_string (str)) \
1918 err = mem_iconveh (scm_i_string_chars (str), c_strlen, \
1919 "ISO-8859-1", c_utf_name, \
1920 iconveh_question_mark, NULL, \
1921 &c_utf, &c_utf_len); \
1922 if (SCM_UNLIKELY (err)) \
1923 scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \
1924 scm_list_1 (str), err); \
1928 const scm_t_wchar *wbuf = scm_i_string_wide_chars (str); \
1929 c_utf = u32_conv_to_encoding (c_utf_name, \
1930 iconveh_question_mark, \
1931 (scm_t_uint32 *) wbuf, \
1932 c_strlen, NULL, NULL, &c_utf_len); \
1933 if (SCM_UNLIKELY (c_utf == NULL)) \
1934 scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \
1935 scm_list_1 (str), errno); \
1937 scm_dynwind_begin (0); \
1938 scm_dynwind_free (c_utf); \
1939 utf = make_bytevector (c_utf_len, SCM_ARRAY_ELEMENT_TYPE_VU8); \
1940 memcpy (SCM_BYTEVECTOR_CONTENTS (utf), c_utf, c_utf_len); \
1941 scm_dynwind_end (); \
1947 SCM_DEFINE (scm_string_to_utf8
, "string->utf8",
1950 "Return a newly allocated bytevector that contains the UTF-8 "
1951 "encoding of @var{str}.")
1952 #define FUNC_NAME s_scm_string_to_utf8
1956 size_t c_strlen
, c_utf_len
= 0;
1958 SCM_VALIDATE_STRING (1, str
);
1960 c_strlen
= scm_i_string_length (str
);
1961 if (scm_i_is_narrow_string (str
))
1962 c_utf
= u8_conv_from_encoding ("ISO-8859-1", iconveh_question_mark
,
1963 scm_i_string_chars (str
), c_strlen
,
1964 NULL
, NULL
, &c_utf_len
);
1967 const scm_t_wchar
*wbuf
= scm_i_string_wide_chars (str
);
1968 c_utf
= u32_to_u8 ((const uint32_t *) wbuf
, c_strlen
, NULL
, &c_utf_len
);
1970 if (SCM_UNLIKELY (c_utf
== NULL
))
1971 scm_syserror (FUNC_NAME
);
1974 scm_dynwind_begin (0);
1975 scm_dynwind_free (c_utf
);
1977 utf
= make_bytevector (c_utf_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
1978 memcpy (SCM_BYTEVECTOR_CONTENTS (utf
), c_utf
, c_utf_len
);
1987 SCM_DEFINE (scm_string_to_utf16
, "string->utf16",
1989 (SCM str
, SCM endianness
),
1990 "Return a newly allocated bytevector that contains the UTF-16 "
1991 "encoding of @var{str}.")
1992 #define FUNC_NAME s_scm_string_to_utf16
1998 SCM_DEFINE (scm_string_to_utf32
, "string->utf32",
2000 (SCM str
, SCM endianness
),
2001 "Return a newly allocated bytevector that contains the UTF-32 "
2002 "encoding of @var{str}.")
2003 #define FUNC_NAME s_scm_string_to_utf32
2010 /* Produce the body of a function that converts a UTF-encoded bytevector to a
2012 #define UTF_TO_STRING(_utf_width) \
2013 SCM str = SCM_BOOL_F; \
2015 char *c_str = NULL; \
2016 char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \
2018 size_t c_strlen = 0, c_utf_len = 0; \
2020 SCM_VALIDATE_BYTEVECTOR (1, utf); \
2021 if (endianness == SCM_UNDEFINED) \
2022 endianness = scm_sym_big; \
2024 SCM_VALIDATE_SYMBOL (2, endianness); \
2026 c_utf_len = SCM_BYTEVECTOR_LENGTH (utf); \
2027 c_utf = (char *) SCM_BYTEVECTOR_CONTENTS (utf); \
2028 utf_encoding_name (c_utf_name, (_utf_width), endianness); \
2030 err = mem_iconveh (c_utf, c_utf_len, \
2031 c_utf_name, "UTF-8", \
2032 iconveh_question_mark, NULL, \
2033 &c_str, &c_strlen); \
2034 if (SCM_UNLIKELY (err)) \
2035 scm_syserror_msg (FUNC_NAME, "failed to convert to string: ~A", \
2036 scm_list_1 (utf), err); \
2039 str = scm_from_stringn (c_str, c_strlen, "UTF-8", \
2040 SCM_FAILED_CONVERSION_ERROR); \
2046 SCM_DEFINE (scm_utf8_to_string
, "utf8->string",
2049 "Return a newly allocate string that contains from the UTF-8-"
2050 "encoded contents of bytevector @var{utf}.")
2051 #define FUNC_NAME s_scm_utf8_to_string
2055 size_t c_utf_len
= 0;
2057 SCM_VALIDATE_BYTEVECTOR (1, utf
);
2059 c_utf_len
= SCM_BYTEVECTOR_LENGTH (utf
);
2060 c_utf
= (char *) SCM_BYTEVECTOR_CONTENTS (utf
);
2061 str
= scm_from_stringn (c_utf
, c_utf_len
, "UTF-8",
2062 SCM_FAILED_CONVERSION_ERROR
);
2068 SCM_DEFINE (scm_utf16_to_string
, "utf16->string",
2070 (SCM utf
, SCM endianness
),
2071 "Return a newly allocate string that contains from the UTF-16-"
2072 "encoded contents of bytevector @var{utf}.")
2073 #define FUNC_NAME s_scm_utf16_to_string
2079 SCM_DEFINE (scm_utf32_to_string
, "utf32->string",
2081 (SCM utf
, SCM endianness
),
2082 "Return a newly allocate string that contains from the UTF-32-"
2083 "encoded contents of bytevector @var{utf}.")
2084 #define FUNC_NAME s_scm_utf32_to_string
2091 /* Bytevectors as generalized vectors & arrays. */
2095 bytevector_ref_c32 (SCM bv
, SCM idx
)
2096 { /* FIXME add some checks */
2097 const float *contents
= (const float*)SCM_BYTEVECTOR_CONTENTS (bv
);
2098 size_t i
= scm_to_size_t (idx
);
2099 return scm_c_make_rectangular (contents
[i
/4], contents
[i
/4 + 1]);
2103 bytevector_ref_c64 (SCM bv
, SCM idx
)
2104 { /* FIXME add some checks */
2105 const double *contents
= (const double*)SCM_BYTEVECTOR_CONTENTS (bv
);
2106 size_t i
= scm_to_size_t (idx
);
2107 return scm_c_make_rectangular (contents
[i
/8], contents
[i
/8 + 1]);
2110 typedef SCM (*scm_t_bytevector_ref_fn
)(SCM
, SCM
);
2112 const scm_t_bytevector_ref_fn bytevector_ref_fns
[SCM_ARRAY_ELEMENT_TYPE_LAST
+ 1] =
2117 scm_bytevector_u8_ref
, /* VU8 */
2118 scm_bytevector_u8_ref
, /* U8 */
2119 scm_bytevector_s8_ref
,
2120 scm_bytevector_u16_native_ref
,
2121 scm_bytevector_s16_native_ref
,
2122 scm_bytevector_u32_native_ref
,
2123 scm_bytevector_s32_native_ref
,
2124 scm_bytevector_u64_native_ref
,
2125 scm_bytevector_s64_native_ref
,
2126 scm_bytevector_ieee_single_native_ref
,
2127 scm_bytevector_ieee_double_native_ref
,
2133 bv_handle_ref (scm_t_array_handle
*h
, size_t index
)
2136 scm_t_bytevector_ref_fn ref_fn
;
2138 ref_fn
= bytevector_ref_fns
[h
->element_type
];
2140 scm_from_size_t (index
* scm_array_handle_uniform_element_size (h
));
2141 return ref_fn (h
->array
, byte_index
);
2144 /* FIXME add checks!!! */
2146 bytevector_set_c32 (SCM bv
, SCM idx
, SCM val
)
2147 { float *contents
= (float*)SCM_BYTEVECTOR_CONTENTS (bv
);
2148 size_t i
= scm_to_size_t (idx
);
2149 contents
[i
/4] = scm_c_real_part (val
);
2150 contents
[i
/4 + 1] = scm_c_imag_part (val
);
2151 return SCM_UNSPECIFIED
;
2155 bytevector_set_c64 (SCM bv
, SCM idx
, SCM val
)
2156 { double *contents
= (double*)SCM_BYTEVECTOR_CONTENTS (bv
);
2157 size_t i
= scm_to_size_t (idx
);
2158 contents
[i
/8] = scm_c_real_part (val
);
2159 contents
[i
/8 + 1] = scm_c_imag_part (val
);
2160 return SCM_UNSPECIFIED
;
2163 typedef SCM (*scm_t_bytevector_set_fn
)(SCM
, SCM
, SCM
);
2165 const scm_t_bytevector_set_fn bytevector_set_fns
[SCM_ARRAY_ELEMENT_TYPE_LAST
+ 1] =
2170 scm_bytevector_u8_set_x
, /* VU8 */
2171 scm_bytevector_u8_set_x
, /* U8 */
2172 scm_bytevector_s8_set_x
,
2173 scm_bytevector_u16_native_set_x
,
2174 scm_bytevector_s16_native_set_x
,
2175 scm_bytevector_u32_native_set_x
,
2176 scm_bytevector_s32_native_set_x
,
2177 scm_bytevector_u64_native_set_x
,
2178 scm_bytevector_s64_native_set_x
,
2179 scm_bytevector_ieee_single_native_set_x
,
2180 scm_bytevector_ieee_double_native_set_x
,
2186 bv_handle_set_x (scm_t_array_handle
*h
, size_t index
, SCM val
)
2189 scm_t_bytevector_set_fn set_fn
;
2191 set_fn
= bytevector_set_fns
[h
->element_type
];
2193 scm_from_size_t (index
* scm_array_handle_uniform_element_size (h
));
2194 set_fn (h
->array
, byte_index
, val
);
2198 bytevector_get_handle (SCM v
, scm_t_array_handle
*h
)
2204 h
->dim0
.ubnd
= SCM_BYTEVECTOR_TYPED_LENGTH (v
) - 1;
2206 h
->element_type
= SCM_BYTEVECTOR_ELEMENT_TYPE (v
);
2207 h
->elements
= h
->writable_elements
= SCM_BYTEVECTOR_CONTENTS (v
);
2211 /* Initialization. */
2214 scm_bootstrap_bytevectors (void)
2216 /* This must be instantiated here because the generalized-vector API may
2217 want to access bytevectors even though `(rnrs bytevectors)' hasn't been
2219 scm_null_bytevector
= make_bytevector (0, SCM_ARRAY_ELEMENT_TYPE_VU8
);
2221 #ifdef WORDS_BIGENDIAN
2222 scm_i_native_endianness
= scm_from_locale_symbol ("big");
2224 scm_i_native_endianness
= scm_from_locale_symbol ("little");
2227 scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION
,
2228 "scm_init_bytevectors",
2229 (scm_t_extension_init_func
) scm_init_bytevectors
,
2233 scm_t_array_implementation impl
;
2235 impl
.tag
= scm_tc7_bytevector
;
2237 impl
.vref
= bv_handle_ref
;
2238 impl
.vset
= bv_handle_set_x
;
2239 impl
.get_handle
= bytevector_get_handle
;
2240 scm_i_register_array_implementation (&impl
);
2241 scm_i_register_vector_constructor
2242 (scm_i_array_element_types
[SCM_ARRAY_ELEMENT_TYPE_VU8
],
2243 scm_make_bytevector
);
2248 scm_init_bytevectors (void)
2250 #include "libguile/bytevectors.x"
2252 scm_endianness_big
= scm_sym_big
;
2253 scm_endianness_little
= scm_sym_little
;