1 /* Copyright (C) 2009, 2010, 2011 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_t_bits))
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_SET_PARENT(_bv, _parent) \
197 SCM_SET_CELL_OBJECT_3 ((_bv), (_parent))
199 #define SCM_BYTEVECTOR_TYPE_SIZE(var) \
200 (scm_i_array_element_type_sizes[SCM_BYTEVECTOR_ELEMENT_TYPE (var)]/8)
201 #define SCM_BYTEVECTOR_TYPED_LENGTH(var) \
202 (SCM_BYTEVECTOR_LENGTH (var) / SCM_BYTEVECTOR_TYPE_SIZE (var))
204 /* The empty bytevector. */
205 SCM scm_null_bytevector
= SCM_UNSPECIFIED
;
209 make_bytevector (size_t len
, scm_t_array_element_type element_type
)
214 if (SCM_UNLIKELY (element_type
> SCM_ARRAY_ELEMENT_TYPE_LAST
215 || scm_i_array_element_type_sizes
[element_type
] < 8
216 || len
>= (((size_t) -1)
217 / (scm_i_array_element_type_sizes
[element_type
]/8))))
218 /* This would be an internal Guile programming error */
221 if (SCM_UNLIKELY (len
== 0 && element_type
== SCM_ARRAY_ELEMENT_TYPE_VU8
222 && SCM_BYTEVECTOR_P (scm_null_bytevector
)))
223 ret
= scm_null_bytevector
;
226 signed char *contents
;
228 c_len
= len
* (scm_i_array_element_type_sizes
[element_type
] / 8);
230 contents
= scm_gc_malloc_pointerless (SCM_BYTEVECTOR_HEADER_BYTES
+ c_len
,
232 ret
= SCM_PACK_POINTER (contents
);
233 contents
+= SCM_BYTEVECTOR_HEADER_BYTES
;
235 SCM_BYTEVECTOR_SET_LENGTH (ret
, c_len
);
236 SCM_BYTEVECTOR_SET_CONTENTS (ret
, contents
);
237 SCM_BYTEVECTOR_SET_CONTIGUOUS_P (ret
, 1);
238 SCM_BYTEVECTOR_SET_ELEMENT_TYPE (ret
, element_type
);
239 SCM_BYTEVECTOR_SET_PARENT (ret
, SCM_BOOL_F
);
245 /* Return a bytevector of LEN elements of type ELEMENT_TYPE, with element
246 values taken from CONTENTS. Assume that the storage for CONTENTS will be
247 automatically reclaimed when it becomes unreachable. */
249 make_bytevector_from_buffer (size_t len
, void *contents
,
250 scm_t_array_element_type element_type
)
254 if (SCM_UNLIKELY (len
== 0))
255 ret
= make_bytevector (len
, element_type
);
260 ret
= SCM_PACK_POINTER (scm_gc_malloc (SCM_BYTEVECTOR_HEADER_BYTES
,
263 c_len
= len
* (scm_i_array_element_type_sizes
[element_type
] / 8);
265 SCM_BYTEVECTOR_SET_LENGTH (ret
, c_len
);
266 SCM_BYTEVECTOR_SET_CONTENTS (ret
, contents
);
267 SCM_BYTEVECTOR_SET_CONTIGUOUS_P (ret
, 0);
268 SCM_BYTEVECTOR_SET_ELEMENT_TYPE (ret
, element_type
);
269 SCM_BYTEVECTOR_SET_PARENT (ret
, SCM_BOOL_F
);
276 /* Return a new bytevector of size LEN octets. */
278 scm_c_make_bytevector (size_t len
)
280 return make_bytevector (len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
283 /* Return a new bytevector of size LEN elements. */
285 scm_i_make_typed_bytevector (size_t len
, scm_t_array_element_type element_type
)
287 return make_bytevector (len
, element_type
);
290 /* Return a bytevector of size LEN made up of CONTENTS. The area
291 pointed to by CONTENTS must be protected from GC somehow: either
292 because it was allocated using `scm_gc_malloc ()', or because it is
295 scm_c_take_gc_bytevector (signed char *contents
, size_t len
, SCM parent
)
299 ret
= make_bytevector_from_buffer (len
, contents
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
300 SCM_BYTEVECTOR_SET_PARENT (ret
, parent
);
306 scm_c_take_typed_bytevector (signed char *contents
, size_t len
,
307 scm_t_array_element_type element_type
, SCM parent
)
311 ret
= make_bytevector_from_buffer (len
, contents
, element_type
);
312 SCM_BYTEVECTOR_SET_PARENT (ret
, parent
);
317 /* Shrink BV to C_NEW_LEN (which is assumed to be smaller than its current
318 size) and return the new bytevector (possibly different from BV). */
320 scm_c_shrink_bytevector (SCM bv
, size_t c_new_len
)
325 if (SCM_UNLIKELY (c_new_len
% SCM_BYTEVECTOR_TYPE_SIZE (bv
)))
326 /* This would be an internal Guile programming error */
329 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
330 if (SCM_UNLIKELY (c_new_len
> c_len
))
333 SCM_BYTEVECTOR_SET_LENGTH (bv
, c_new_len
);
335 if (SCM_BYTEVECTOR_CONTIGUOUS_P (bv
))
336 new_bv
= SCM_PACK_POINTER (scm_gc_realloc (SCM_HEAP_OBJECT_BASE (bv
),
337 c_len
+ SCM_BYTEVECTOR_HEADER_BYTES
,
338 c_new_len
+ SCM_BYTEVECTOR_HEADER_BYTES
,
344 c_bv
= scm_gc_realloc (SCM_BYTEVECTOR_CONTENTS (bv
),
345 c_len
, c_new_len
, SCM_GC_BYTEVECTOR
);
346 SCM_BYTEVECTOR_SET_CONTENTS (bv
, c_bv
);
355 scm_is_bytevector (SCM obj
)
357 return SCM_BYTEVECTOR_P (obj
);
361 scm_c_bytevector_length (SCM bv
)
362 #define FUNC_NAME "scm_c_bytevector_length"
364 SCM_VALIDATE_BYTEVECTOR (1, bv
);
366 return SCM_BYTEVECTOR_LENGTH (bv
);
371 scm_c_bytevector_ref (SCM bv
, size_t index
)
372 #define FUNC_NAME "scm_c_bytevector_ref"
375 const scm_t_uint8
*c_bv
;
377 SCM_VALIDATE_BYTEVECTOR (1, bv
);
379 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
380 c_bv
= (scm_t_uint8
*) SCM_BYTEVECTOR_CONTENTS (bv
);
382 if (SCM_UNLIKELY (index
>= c_len
))
383 scm_out_of_range (FUNC_NAME
, scm_from_size_t (index
));
390 scm_c_bytevector_set_x (SCM bv
, size_t index
, scm_t_uint8 value
)
391 #define FUNC_NAME "scm_c_bytevector_set_x"
396 SCM_VALIDATE_BYTEVECTOR (1, bv
);
398 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
399 c_bv
= (scm_t_uint8
*) SCM_BYTEVECTOR_CONTENTS (bv
);
401 if (SCM_UNLIKELY (index
>= c_len
))
402 scm_out_of_range (FUNC_NAME
, scm_from_size_t (index
));
411 scm_i_print_bytevector (SCM bv
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
413 ssize_t ubnd
, inc
, i
;
414 scm_t_array_handle h
;
416 scm_array_get_handle (bv
, &h
);
418 scm_putc_unlocked ('#', port
);
419 scm_write (scm_array_handle_element_type (&h
), port
);
420 scm_putc_unlocked ('(', port
);
421 for (i
= h
.dims
[0].lbnd
, ubnd
= h
.dims
[0].ubnd
, inc
= h
.dims
[0].inc
;
425 scm_putc_unlocked (' ', port
);
426 scm_write (scm_array_handle_ref (&h
, i
), port
);
428 scm_putc_unlocked (')', port
);
434 /* General operations. */
436 SCM_SYMBOL (scm_sym_big
, "big");
437 SCM_SYMBOL (scm_sym_little
, "little");
439 SCM scm_endianness_big
, scm_endianness_little
;
441 /* Host endianness (a symbol). */
442 SCM scm_i_native_endianness
= SCM_UNSPECIFIED
;
446 # define bswap_24(_x) \
447 ((((_x) & 0xff0000) >> 16) | \
448 (((_x) & 0x00ff00)) | \
449 (((_x) & 0x0000ff) << 16))
453 SCM_DEFINE (scm_native_endianness
, "native-endianness", 0, 0, 0,
455 "Return a symbol denoting the machine's native endianness.")
456 #define FUNC_NAME s_scm_native_endianness
458 return scm_i_native_endianness
;
462 SCM_DEFINE (scm_bytevector_p
, "bytevector?", 1, 0, 0,
464 "Return true if @var{obj} is a bytevector.")
465 #define FUNC_NAME s_scm_bytevector_p
467 return scm_from_bool (scm_is_bytevector (obj
));
471 SCM_DEFINE (scm_make_bytevector
, "make-bytevector", 1, 1, 0,
473 "Return a newly allocated bytevector of @var{len} bytes, "
474 "optionally filled with @var{fill}.")
475 #define FUNC_NAME s_scm_make_bytevector
479 signed char c_fill
= '\0';
481 SCM_VALIDATE_UINT_COPY (1, len
, c_len
);
482 if (!scm_is_eq (fill
, SCM_UNDEFINED
))
486 value
= scm_to_int (fill
);
487 if (SCM_UNLIKELY ((value
< -128) || (value
> 255)))
488 scm_out_of_range (FUNC_NAME
, fill
);
489 c_fill
= (signed char) value
;
492 bv
= make_bytevector (c_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
493 if (!scm_is_eq (fill
, SCM_UNDEFINED
))
496 signed char *contents
;
498 contents
= SCM_BYTEVECTOR_CONTENTS (bv
);
499 for (i
= 0; i
< c_len
; i
++)
500 contents
[i
] = c_fill
;
503 memset (SCM_BYTEVECTOR_CONTENTS (bv
), 0, c_len
);
509 SCM_DEFINE (scm_bytevector_length
, "bytevector-length", 1, 0, 0,
511 "Return the length (in bytes) of @var{bv}.")
512 #define FUNC_NAME s_scm_bytevector_length
514 return scm_from_uint (scm_c_bytevector_length (bv
));
518 SCM_DEFINE (scm_bytevector_eq_p
, "bytevector=?", 2, 0, 0,
520 "Return is @var{bv1} equals to @var{bv2}---i.e., if they "
521 "have the same length and contents.")
522 #define FUNC_NAME s_scm_bytevector_eq_p
524 SCM result
= SCM_BOOL_F
;
525 unsigned c_len1
, c_len2
;
527 SCM_VALIDATE_BYTEVECTOR (1, bv1
);
528 SCM_VALIDATE_BYTEVECTOR (2, bv2
);
530 c_len1
= SCM_BYTEVECTOR_LENGTH (bv1
);
531 c_len2
= SCM_BYTEVECTOR_LENGTH (bv2
);
533 if (c_len1
== c_len2
&& (SCM_BYTEVECTOR_ELEMENT_TYPE (bv1
)
534 == SCM_BYTEVECTOR_ELEMENT_TYPE (bv2
)))
536 signed char *c_bv1
, *c_bv2
;
538 c_bv1
= SCM_BYTEVECTOR_CONTENTS (bv1
);
539 c_bv2
= SCM_BYTEVECTOR_CONTENTS (bv2
);
541 result
= scm_from_bool (!memcmp (c_bv1
, c_bv2
, c_len1
));
548 SCM_DEFINE (scm_bytevector_fill_x
, "bytevector-fill!", 2, 0, 0,
550 "Fill bytevector @var{bv} with @var{fill}, a byte.")
551 #define FUNC_NAME s_scm_bytevector_fill_x
554 signed char *c_bv
, c_fill
;
556 SCM_VALIDATE_BYTEVECTOR (1, bv
);
557 c_fill
= scm_to_int8 (fill
);
559 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
560 c_bv
= SCM_BYTEVECTOR_CONTENTS (bv
);
562 for (i
= 0; i
< c_len
; i
++)
565 return SCM_UNSPECIFIED
;
569 SCM_DEFINE (scm_bytevector_copy_x
, "bytevector-copy!", 5, 0, 0,
570 (SCM source
, SCM source_start
, SCM target
, SCM target_start
,
572 "Copy @var{len} bytes from @var{source} into @var{target}, "
573 "starting reading from @var{source_start} (a positive index "
574 "within @var{source}) and start writing at "
575 "@var{target_start}.")
576 #define FUNC_NAME s_scm_bytevector_copy_x
578 unsigned c_len
, c_source_len
, c_target_len
;
579 unsigned c_source_start
, c_target_start
;
580 signed char *c_source
, *c_target
;
582 SCM_VALIDATE_BYTEVECTOR (1, source
);
583 SCM_VALIDATE_BYTEVECTOR (3, target
);
585 c_len
= scm_to_uint (len
);
586 c_source_start
= scm_to_uint (source_start
);
587 c_target_start
= scm_to_uint (target_start
);
589 c_source
= SCM_BYTEVECTOR_CONTENTS (source
);
590 c_target
= SCM_BYTEVECTOR_CONTENTS (target
);
591 c_source_len
= SCM_BYTEVECTOR_LENGTH (source
);
592 c_target_len
= SCM_BYTEVECTOR_LENGTH (target
);
594 if (SCM_UNLIKELY (c_source_start
+ c_len
> c_source_len
))
595 scm_out_of_range (FUNC_NAME
, source_start
);
596 if (SCM_UNLIKELY (c_target_start
+ c_len
> c_target_len
))
597 scm_out_of_range (FUNC_NAME
, target_start
);
599 memmove (c_target
+ c_target_start
,
600 c_source
+ c_source_start
,
603 return SCM_UNSPECIFIED
;
607 SCM_DEFINE (scm_bytevector_copy
, "bytevector-copy", 1, 0, 0,
609 "Return a newly allocated copy of @var{bv}.")
610 #define FUNC_NAME s_scm_bytevector_copy
614 signed char *c_bv
, *c_copy
;
616 SCM_VALIDATE_BYTEVECTOR (1, bv
);
618 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
619 c_bv
= SCM_BYTEVECTOR_CONTENTS (bv
);
621 copy
= make_bytevector (c_len
, SCM_BYTEVECTOR_ELEMENT_TYPE (bv
));
622 c_copy
= SCM_BYTEVECTOR_CONTENTS (copy
);
623 memcpy (c_copy
, c_bv
, c_len
);
629 SCM_DEFINE (scm_uniform_array_to_bytevector
, "uniform-array->bytevector",
630 1, 0, 0, (SCM array
),
631 "Return a newly allocated bytevector whose contents\n"
632 "will be copied from the uniform array @var{array}.")
633 #define FUNC_NAME s_scm_uniform_array_to_bytevector
636 size_t len
, sz
, byte_len
;
637 scm_t_array_handle h
;
640 contents
= scm_array_contents (array
, SCM_BOOL_T
);
641 if (scm_is_false (contents
))
642 scm_wrong_type_arg_msg (FUNC_NAME
, 0, array
, "uniform contiguous array");
644 scm_array_get_handle (contents
, &h
);
645 assert (h
.base
== 0);
648 len
= h
.dims
->inc
* (h
.dims
->ubnd
- h
.dims
->lbnd
+ 1);
649 sz
= scm_array_handle_uniform_element_bit_size (&h
);
650 if (sz
>= 8 && ((sz
% 8) == 0))
651 byte_len
= len
* (sz
/ 8);
653 /* byte_len = ceil (len * sz / 8) */
654 byte_len
= (len
* sz
+ 7) / 8;
656 /* an internal guile error, really */
657 SCM_MISC_ERROR ("uniform elements larger than 8 bits must fill whole bytes", SCM_EOL
);
659 ret
= make_bytevector (byte_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
660 memcpy (SCM_BYTEVECTOR_CONTENTS (ret
), elts
, byte_len
);
662 scm_array_handle_release (&h
);
669 /* Operations on bytes and octets. */
671 SCM_DEFINE (scm_bytevector_u8_ref
, "bytevector-u8-ref", 2, 0, 0,
673 "Return the octet located at @var{index} in @var{bv}.")
674 #define FUNC_NAME s_scm_bytevector_u8_ref
676 INTEGER_NATIVE_REF (8, unsigned);
680 SCM_DEFINE (scm_bytevector_s8_ref
, "bytevector-s8-ref", 2, 0, 0,
682 "Return the byte located at @var{index} in @var{bv}.")
683 #define FUNC_NAME s_scm_bytevector_s8_ref
685 INTEGER_NATIVE_REF (8, signed);
689 SCM_DEFINE (scm_bytevector_u8_set_x
, "bytevector-u8-set!", 3, 0, 0,
690 (SCM bv
, SCM index
, SCM value
),
691 "Return the octet located at @var{index} in @var{bv}.")
692 #define FUNC_NAME s_scm_bytevector_u8_set_x
694 INTEGER_NATIVE_SET (8, unsigned);
698 SCM_DEFINE (scm_bytevector_s8_set_x
, "bytevector-s8-set!", 3, 0, 0,
699 (SCM bv
, SCM index
, SCM value
),
700 "Return the octet located at @var{index} in @var{bv}.")
701 #define FUNC_NAME s_scm_bytevector_s8_set_x
703 INTEGER_NATIVE_SET (8, signed);
707 #undef OCTET_ACCESSOR_PROLOGUE
710 SCM_DEFINE (scm_bytevector_to_u8_list
, "bytevector->u8-list", 1, 0, 0,
712 "Return a newly allocated list of octets containing the "
713 "contents of @var{bv}.")
714 #define FUNC_NAME s_scm_bytevector_to_u8_list
720 SCM_VALIDATE_BYTEVECTOR (1, bv
);
722 c_len
= SCM_BYTEVECTOR_LENGTH (bv
);
723 c_bv
= (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv
);
725 lst
= scm_make_list (scm_from_uint (c_len
), SCM_UNSPECIFIED
);
726 for (i
= 0, pair
= lst
;
728 i
++, pair
= SCM_CDR (pair
))
730 SCM_SETCAR (pair
, SCM_I_MAKINUM (c_bv
[i
]));
737 SCM_DEFINE (scm_u8_list_to_bytevector
, "u8-list->bytevector", 1, 0, 0,
739 "Turn @var{lst}, a list of octets, into a bytevector.")
740 #define FUNC_NAME s_scm_u8_list_to_bytevector
746 SCM_VALIDATE_LIST_COPYLEN (1, lst
, c_len
);
748 bv
= make_bytevector (c_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
749 c_bv
= (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv
);
751 for (i
= 0; i
< c_len
; lst
= SCM_CDR (lst
), i
++)
753 item
= SCM_CAR (lst
);
755 if (SCM_LIKELY (SCM_I_INUMP (item
)))
757 scm_t_signed_bits c_item
;
759 c_item
= SCM_I_INUM (item
);
760 if (SCM_LIKELY ((c_item
>= 0) && (c_item
< 256)))
761 c_bv
[i
] = (unsigned char) c_item
;
772 scm_wrong_type_arg (FUNC_NAME
, 1, item
);
778 /* Compute the two's complement of VALUE (a positive integer) on SIZE octets
779 using (2^(SIZE * 8) - VALUE). */
781 twos_complement (mpz_t value
, size_t size
)
783 unsigned long bit_count
;
785 /* We expect BIT_COUNT to fit in a unsigned long thanks to the range
786 checking on SIZE performed earlier. */
787 bit_count
= (unsigned long) size
<< 3UL;
789 if (SCM_LIKELY (bit_count
< sizeof (unsigned long)))
790 mpz_ui_sub (value
, 1UL << bit_count
, value
);
796 mpz_ui_pow_ui (max
, 2, bit_count
);
797 mpz_sub (value
, max
, value
);
803 bytevector_large_ref (const char *c_bv
, size_t c_size
, int signed_p
,
808 int c_endianness
, negative_p
= 0;
812 if (scm_is_eq (endianness
, scm_sym_big
))
813 negative_p
= c_bv
[0] & 0x80;
815 negative_p
= c_bv
[c_size
- 1] & 0x80;
818 c_endianness
= scm_is_eq (endianness
, scm_sym_big
) ? 1 : -1;
821 mpz_import (c_mpz
, 1 /* 1 word */, 1 /* word order doesn't matter */,
822 c_size
/* word is C_SIZE-byte long */,
824 0 /* nails */, c_bv
);
826 if (signed_p
&& negative_p
)
828 twos_complement (c_mpz
, c_size
);
829 mpz_neg (c_mpz
, c_mpz
);
832 result
= scm_from_mpz (c_mpz
);
833 mpz_clear (c_mpz
); /* FIXME: Needed? */
839 bytevector_large_set (char *c_bv
, size_t c_size
, int signed_p
,
840 SCM value
, SCM endianness
)
843 int c_endianness
, c_sign
, err
= 0;
845 c_endianness
= scm_is_eq (endianness
, scm_sym_big
) ? 1 : -1;
848 scm_to_mpz (value
, c_mpz
);
850 c_sign
= mpz_sgn (c_mpz
);
853 if (SCM_LIKELY (signed_p
))
855 mpz_neg (c_mpz
, c_mpz
);
856 twos_complement (c_mpz
, c_size
);
867 memset (c_bv
, 0, c_size
);
870 size_t word_count
, value_size
;
872 value_size
= (mpz_sizeinbase (c_mpz
, 2) + (8 * c_size
)) / (8 * c_size
);
873 if (SCM_UNLIKELY (value_size
> c_size
))
880 mpz_export (c_bv
, &word_count
, 1 /* word order doesn't matter */,
881 c_size
, c_endianness
,
882 0 /* nails */, c_mpz
);
883 if (SCM_UNLIKELY (word_count
!= 1))
884 /* Shouldn't happen since we already checked with VALUE_SIZE. */
894 #define GENERIC_INTEGER_ACCESSOR_PROLOGUE(_sign) \
895 unsigned long c_len, c_index, c_size; \
898 SCM_VALIDATE_BYTEVECTOR (1, bv); \
899 c_index = scm_to_ulong (index); \
900 c_size = scm_to_ulong (size); \
902 c_len = SCM_BYTEVECTOR_LENGTH (bv); \
903 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
905 /* C_SIZE must have its 3 higher bits set to zero so that \
906 multiplying it by 8 yields a number that fits in an \
908 if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \
909 scm_out_of_range (FUNC_NAME, size); \
910 if (SCM_UNLIKELY (c_index + c_size > c_len)) \
911 scm_out_of_range (FUNC_NAME, index);
914 /* Template of an integer reference function. */
915 #define GENERIC_INTEGER_REF(_sign) \
923 swap = !scm_is_eq (endianness, scm_i_native_endianness); \
928 _sign char c_value8; \
929 memcpy (&c_value8, c_bv, 1); \
935 INT_TYPE (16, _sign) c_value16; \
936 memcpy (&c_value16, c_bv, 2); \
938 value = (INT_TYPE (16, _sign)) bswap_16 (c_value16); \
947 result = SCM_I_MAKINUM ((_sign int) value); \
950 result = bytevector_large_ref ((char *) c_bv, \
951 c_size, SIGNEDNESS (_sign), \
957 bytevector_signed_ref (const char *c_bv
, size_t c_size
, SCM endianness
)
959 GENERIC_INTEGER_REF (signed);
963 bytevector_unsigned_ref (const char *c_bv
, size_t c_size
, SCM endianness
)
965 GENERIC_INTEGER_REF (unsigned);
969 /* Template of an integer assignment function. */
970 #define GENERIC_INTEGER_SET(_sign) \
973 scm_t_signed_bits c_value; \
975 if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \
978 c_value = SCM_I_INUM (value); \
982 if (SCM_LIKELY (INT_VALID_P (8, _sign) (c_value))) \
984 _sign char c_value8; \
985 c_value8 = (_sign char) c_value; \
986 memcpy (c_bv, &c_value8, 1); \
993 if (SCM_LIKELY (INT_VALID_P (16, _sign) (c_value))) \
996 INT_TYPE (16, _sign) c_value16; \
998 swap = !scm_is_eq (endianness, scm_i_native_endianness); \
1001 c_value16 = (INT_TYPE (16, _sign)) bswap_16 (c_value); \
1003 c_value16 = c_value; \
1005 memcpy (c_bv, &c_value16, 2); \
1019 err = bytevector_large_set (c_bv, c_size, \
1020 SIGNEDNESS (_sign), \
1021 value, endianness); \
1029 scm_out_of_range (FUNC_NAME, value); \
1033 bytevector_signed_set (char *c_bv
, size_t c_size
,
1034 SCM value
, SCM endianness
,
1035 const char *func_name
)
1036 #define FUNC_NAME func_name
1038 GENERIC_INTEGER_SET (signed);
1043 bytevector_unsigned_set (char *c_bv
, size_t c_size
,
1044 SCM value
, SCM endianness
,
1045 const char *func_name
)
1046 #define FUNC_NAME func_name
1048 GENERIC_INTEGER_SET (unsigned);
1052 #undef GENERIC_INTEGER_SET
1053 #undef GENERIC_INTEGER_REF
1056 SCM_DEFINE (scm_bytevector_uint_ref
, "bytevector-uint-ref", 4, 0, 0,
1057 (SCM bv
, SCM index
, SCM endianness
, SCM size
),
1058 "Return the @var{size}-octet long unsigned integer at index "
1059 "@var{index} in @var{bv}.")
1060 #define FUNC_NAME s_scm_bytevector_uint_ref
1062 GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned);
1064 return (bytevector_unsigned_ref (&c_bv
[c_index
], c_size
, endianness
));
1068 SCM_DEFINE (scm_bytevector_sint_ref
, "bytevector-sint-ref", 4, 0, 0,
1069 (SCM bv
, SCM index
, SCM endianness
, SCM size
),
1070 "Return the @var{size}-octet long unsigned integer at index "
1071 "@var{index} in @var{bv}.")
1072 #define FUNC_NAME s_scm_bytevector_sint_ref
1074 GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed);
1076 return (bytevector_signed_ref (&c_bv
[c_index
], c_size
, endianness
));
1080 SCM_DEFINE (scm_bytevector_uint_set_x
, "bytevector-uint-set!", 5, 0, 0,
1081 (SCM bv
, SCM index
, SCM value
, SCM endianness
, SCM size
),
1082 "Set the @var{size}-octet long unsigned integer at @var{index} "
1084 #define FUNC_NAME s_scm_bytevector_uint_set_x
1086 GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned);
1088 bytevector_unsigned_set (&c_bv
[c_index
], c_size
, value
, endianness
,
1091 return SCM_UNSPECIFIED
;
1095 SCM_DEFINE (scm_bytevector_sint_set_x
, "bytevector-sint-set!", 5, 0, 0,
1096 (SCM bv
, SCM index
, SCM value
, SCM endianness
, SCM size
),
1097 "Set the @var{size}-octet long signed integer at @var{index} "
1099 #define FUNC_NAME s_scm_bytevector_sint_set_x
1101 GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed);
1103 bytevector_signed_set (&c_bv
[c_index
], c_size
, value
, endianness
,
1106 return SCM_UNSPECIFIED
;
1112 /* Operations on integers of arbitrary size. */
1114 #define INTEGERS_TO_LIST(_sign) \
1116 size_t i, c_len, c_size; \
1118 SCM_VALIDATE_BYTEVECTOR (1, bv); \
1119 SCM_VALIDATE_SYMBOL (2, endianness); \
1120 c_size = scm_to_uint (size); \
1122 c_len = SCM_BYTEVECTOR_LENGTH (bv); \
1123 if (SCM_UNLIKELY (c_len == 0)) \
1125 else if (SCM_UNLIKELY (c_len < c_size)) \
1126 scm_out_of_range (FUNC_NAME, size); \
1131 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
1133 lst = scm_make_list (scm_from_uint (c_len / c_size), \
1135 for (i = 0, pair = lst; \
1136 i <= c_len - c_size; \
1137 i += c_size, c_bv += c_size, pair = SCM_CDR (pair)) \
1140 bytevector_ ## _sign ## _ref (c_bv, c_size, \
1147 SCM_DEFINE (scm_bytevector_to_sint_list
, "bytevector->sint-list",
1149 (SCM bv
, SCM endianness
, SCM size
),
1150 "Return a list of signed integers of @var{size} octets "
1151 "representing the contents of @var{bv}.")
1152 #define FUNC_NAME s_scm_bytevector_to_sint_list
1154 INTEGERS_TO_LIST (signed);
1158 SCM_DEFINE (scm_bytevector_to_uint_list
, "bytevector->uint-list",
1160 (SCM bv
, SCM endianness
, SCM size
),
1161 "Return a list of unsigned integers of @var{size} octets "
1162 "representing the contents of @var{bv}.")
1163 #define FUNC_NAME s_scm_bytevector_to_uint_list
1165 INTEGERS_TO_LIST (unsigned);
1169 #undef INTEGER_TO_LIST
1172 #define INTEGER_LIST_TO_BYTEVECTOR(_sign) \
1176 char *c_bv, *c_bv_ptr; \
1178 SCM_VALIDATE_LIST_COPYLEN (1, lst, c_len); \
1179 SCM_VALIDATE_SYMBOL (2, endianness); \
1180 c_size = scm_to_uint (size); \
1182 if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \
1183 scm_out_of_range (FUNC_NAME, size); \
1185 bv = make_bytevector (c_len * c_size, SCM_ARRAY_ELEMENT_TYPE_VU8); \
1186 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
1188 for (c_bv_ptr = c_bv; \
1189 !scm_is_null (lst); \
1190 lst = SCM_CDR (lst), c_bv_ptr += c_size) \
1192 bytevector_ ## _sign ## _set (c_bv_ptr, c_size, \
1193 SCM_CAR (lst), endianness, \
1200 SCM_DEFINE (scm_uint_list_to_bytevector
, "uint-list->bytevector",
1202 (SCM lst
, SCM endianness
, SCM size
),
1203 "Return a bytevector containing the unsigned integers "
1204 "listed in @var{lst} and encoded on @var{size} octets "
1205 "according to @var{endianness}.")
1206 #define FUNC_NAME s_scm_uint_list_to_bytevector
1208 INTEGER_LIST_TO_BYTEVECTOR (unsigned);
1212 SCM_DEFINE (scm_sint_list_to_bytevector
, "sint-list->bytevector",
1214 (SCM lst
, SCM endianness
, SCM size
),
1215 "Return a bytevector containing the signed integers "
1216 "listed in @var{lst} and encoded on @var{size} octets "
1217 "according to @var{endianness}.")
1218 #define FUNC_NAME s_scm_sint_list_to_bytevector
1220 INTEGER_LIST_TO_BYTEVECTOR (signed);
1224 #undef INTEGER_LIST_TO_BYTEVECTOR
1228 /* Operations on 16-bit integers. */
1230 SCM_DEFINE (scm_bytevector_u16_ref
, "bytevector-u16-ref",
1232 (SCM bv
, SCM index
, SCM endianness
),
1233 "Return the unsigned 16-bit integer from @var{bv} at "
1235 #define FUNC_NAME s_scm_bytevector_u16_ref
1237 INTEGER_REF (16, unsigned);
1241 SCM_DEFINE (scm_bytevector_s16_ref
, "bytevector-s16-ref",
1243 (SCM bv
, SCM index
, SCM endianness
),
1244 "Return the signed 16-bit integer from @var{bv} at "
1246 #define FUNC_NAME s_scm_bytevector_s16_ref
1248 INTEGER_REF (16, signed);
1252 SCM_DEFINE (scm_bytevector_u16_native_ref
, "bytevector-u16-native-ref",
1254 (SCM bv
, SCM index
),
1255 "Return the unsigned 16-bit integer from @var{bv} at "
1256 "@var{index} using the native endianness.")
1257 #define FUNC_NAME s_scm_bytevector_u16_native_ref
1259 INTEGER_NATIVE_REF (16, unsigned);
1263 SCM_DEFINE (scm_bytevector_s16_native_ref
, "bytevector-s16-native-ref",
1265 (SCM bv
, SCM index
),
1266 "Return the unsigned 16-bit integer from @var{bv} at "
1267 "@var{index} using the native endianness.")
1268 #define FUNC_NAME s_scm_bytevector_s16_native_ref
1270 INTEGER_NATIVE_REF (16, signed);
1274 SCM_DEFINE (scm_bytevector_u16_set_x
, "bytevector-u16-set!",
1276 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1277 "Store @var{value} in @var{bv} at @var{index} according to "
1278 "@var{endianness}.")
1279 #define FUNC_NAME s_scm_bytevector_u16_set_x
1281 INTEGER_SET (16, unsigned);
1285 SCM_DEFINE (scm_bytevector_s16_set_x
, "bytevector-s16-set!",
1287 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1288 "Store @var{value} in @var{bv} at @var{index} according to "
1289 "@var{endianness}.")
1290 #define FUNC_NAME s_scm_bytevector_s16_set_x
1292 INTEGER_SET (16, signed);
1296 SCM_DEFINE (scm_bytevector_u16_native_set_x
, "bytevector-u16-native-set!",
1298 (SCM bv
, SCM index
, SCM value
),
1299 "Store the unsigned integer @var{value} at index @var{index} "
1300 "of @var{bv} using the native endianness.")
1301 #define FUNC_NAME s_scm_bytevector_u16_native_set_x
1303 INTEGER_NATIVE_SET (16, unsigned);
1307 SCM_DEFINE (scm_bytevector_s16_native_set_x
, "bytevector-s16-native-set!",
1309 (SCM bv
, SCM index
, SCM value
),
1310 "Store the signed integer @var{value} at index @var{index} "
1311 "of @var{bv} using the native endianness.")
1312 #define FUNC_NAME s_scm_bytevector_s16_native_set_x
1314 INTEGER_NATIVE_SET (16, signed);
1320 /* Operations on 32-bit integers. */
1322 /* Unfortunately, on 32-bit machines `SCM' is not large enough to hold
1323 arbitrary 32-bit integers. Thus we fall back to using the
1324 `large_{ref,set}' variants on 32-bit machines. */
1326 #define LARGE_INTEGER_REF(_len, _sign) \
1327 INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \
1328 SCM_VALIDATE_SYMBOL (3, endianness); \
1330 return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \
1331 SIGNEDNESS (_sign), endianness));
1333 #define LARGE_INTEGER_SET(_len, _sign) \
1335 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
1336 SCM_VALIDATE_SYMBOL (4, endianness); \
1338 err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \
1339 SIGNEDNESS (_sign), value, endianness); \
1340 if (SCM_UNLIKELY (err)) \
1341 scm_out_of_range (FUNC_NAME, value); \
1343 return SCM_UNSPECIFIED;
1345 #define LARGE_INTEGER_NATIVE_REF(_len, _sign) \
1346 INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \
1347 return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \
1348 SIGNEDNESS (_sign), scm_i_native_endianness));
1350 #define LARGE_INTEGER_NATIVE_SET(_len, _sign) \
1352 INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \
1354 err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \
1355 SIGNEDNESS (_sign), value, \
1356 scm_i_native_endianness); \
1357 if (SCM_UNLIKELY (err)) \
1358 scm_out_of_range (FUNC_NAME, value); \
1360 return SCM_UNSPECIFIED;
1363 SCM_DEFINE (scm_bytevector_u32_ref
, "bytevector-u32-ref",
1365 (SCM bv
, SCM index
, SCM endianness
),
1366 "Return the unsigned 32-bit integer from @var{bv} at "
1368 #define FUNC_NAME s_scm_bytevector_u32_ref
1370 #if SIZEOF_VOID_P > 4
1371 INTEGER_REF (32, unsigned);
1373 LARGE_INTEGER_REF (32, unsigned);
1378 SCM_DEFINE (scm_bytevector_s32_ref
, "bytevector-s32-ref",
1380 (SCM bv
, SCM index
, SCM endianness
),
1381 "Return the signed 32-bit integer from @var{bv} at "
1383 #define FUNC_NAME s_scm_bytevector_s32_ref
1385 #if SIZEOF_VOID_P > 4
1386 INTEGER_REF (32, signed);
1388 LARGE_INTEGER_REF (32, signed);
1393 SCM_DEFINE (scm_bytevector_u32_native_ref
, "bytevector-u32-native-ref",
1395 (SCM bv
, SCM index
),
1396 "Return the unsigned 32-bit integer from @var{bv} at "
1397 "@var{index} using the native endianness.")
1398 #define FUNC_NAME s_scm_bytevector_u32_native_ref
1400 #if SIZEOF_VOID_P > 4
1401 INTEGER_NATIVE_REF (32, unsigned);
1403 LARGE_INTEGER_NATIVE_REF (32, unsigned);
1408 SCM_DEFINE (scm_bytevector_s32_native_ref
, "bytevector-s32-native-ref",
1410 (SCM bv
, SCM index
),
1411 "Return the unsigned 32-bit integer from @var{bv} at "
1412 "@var{index} using the native endianness.")
1413 #define FUNC_NAME s_scm_bytevector_s32_native_ref
1415 #if SIZEOF_VOID_P > 4
1416 INTEGER_NATIVE_REF (32, signed);
1418 LARGE_INTEGER_NATIVE_REF (32, signed);
1423 SCM_DEFINE (scm_bytevector_u32_set_x
, "bytevector-u32-set!",
1425 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1426 "Store @var{value} in @var{bv} at @var{index} according to "
1427 "@var{endianness}.")
1428 #define FUNC_NAME s_scm_bytevector_u32_set_x
1430 #if SIZEOF_VOID_P > 4
1431 INTEGER_SET (32, unsigned);
1433 LARGE_INTEGER_SET (32, unsigned);
1438 SCM_DEFINE (scm_bytevector_s32_set_x
, "bytevector-s32-set!",
1440 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1441 "Store @var{value} in @var{bv} at @var{index} according to "
1442 "@var{endianness}.")
1443 #define FUNC_NAME s_scm_bytevector_s32_set_x
1445 #if SIZEOF_VOID_P > 4
1446 INTEGER_SET (32, signed);
1448 LARGE_INTEGER_SET (32, signed);
1453 SCM_DEFINE (scm_bytevector_u32_native_set_x
, "bytevector-u32-native-set!",
1455 (SCM bv
, SCM index
, SCM value
),
1456 "Store the unsigned integer @var{value} at index @var{index} "
1457 "of @var{bv} using the native endianness.")
1458 #define FUNC_NAME s_scm_bytevector_u32_native_set_x
1460 #if SIZEOF_VOID_P > 4
1461 INTEGER_NATIVE_SET (32, unsigned);
1463 LARGE_INTEGER_NATIVE_SET (32, unsigned);
1468 SCM_DEFINE (scm_bytevector_s32_native_set_x
, "bytevector-s32-native-set!",
1470 (SCM bv
, SCM index
, SCM value
),
1471 "Store the signed integer @var{value} at index @var{index} "
1472 "of @var{bv} using the native endianness.")
1473 #define FUNC_NAME s_scm_bytevector_s32_native_set_x
1475 #if SIZEOF_VOID_P > 4
1476 INTEGER_NATIVE_SET (32, signed);
1478 LARGE_INTEGER_NATIVE_SET (32, signed);
1485 /* Operations on 64-bit integers. */
1487 /* For 64-bit integers, we use only the `large_{ref,set}' variant. */
1489 SCM_DEFINE (scm_bytevector_u64_ref
, "bytevector-u64-ref",
1491 (SCM bv
, SCM index
, SCM endianness
),
1492 "Return the unsigned 64-bit integer from @var{bv} at "
1494 #define FUNC_NAME s_scm_bytevector_u64_ref
1496 LARGE_INTEGER_REF (64, unsigned);
1500 SCM_DEFINE (scm_bytevector_s64_ref
, "bytevector-s64-ref",
1502 (SCM bv
, SCM index
, SCM endianness
),
1503 "Return the signed 64-bit integer from @var{bv} at "
1505 #define FUNC_NAME s_scm_bytevector_s64_ref
1507 LARGE_INTEGER_REF (64, signed);
1511 SCM_DEFINE (scm_bytevector_u64_native_ref
, "bytevector-u64-native-ref",
1513 (SCM bv
, SCM index
),
1514 "Return the unsigned 64-bit integer from @var{bv} at "
1515 "@var{index} using the native endianness.")
1516 #define FUNC_NAME s_scm_bytevector_u64_native_ref
1518 LARGE_INTEGER_NATIVE_REF (64, unsigned);
1522 SCM_DEFINE (scm_bytevector_s64_native_ref
, "bytevector-s64-native-ref",
1524 (SCM bv
, SCM index
),
1525 "Return the unsigned 64-bit integer from @var{bv} at "
1526 "@var{index} using the native endianness.")
1527 #define FUNC_NAME s_scm_bytevector_s64_native_ref
1529 LARGE_INTEGER_NATIVE_REF (64, signed);
1533 SCM_DEFINE (scm_bytevector_u64_set_x
, "bytevector-u64-set!",
1535 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1536 "Store @var{value} in @var{bv} at @var{index} according to "
1537 "@var{endianness}.")
1538 #define FUNC_NAME s_scm_bytevector_u64_set_x
1540 LARGE_INTEGER_SET (64, unsigned);
1544 SCM_DEFINE (scm_bytevector_s64_set_x
, "bytevector-s64-set!",
1546 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1547 "Store @var{value} in @var{bv} at @var{index} according to "
1548 "@var{endianness}.")
1549 #define FUNC_NAME s_scm_bytevector_s64_set_x
1551 LARGE_INTEGER_SET (64, signed);
1555 SCM_DEFINE (scm_bytevector_u64_native_set_x
, "bytevector-u64-native-set!",
1557 (SCM bv
, SCM index
, SCM value
),
1558 "Store the unsigned integer @var{value} at index @var{index} "
1559 "of @var{bv} using the native endianness.")
1560 #define FUNC_NAME s_scm_bytevector_u64_native_set_x
1562 LARGE_INTEGER_NATIVE_SET (64, unsigned);
1566 SCM_DEFINE (scm_bytevector_s64_native_set_x
, "bytevector-s64-native-set!",
1568 (SCM bv
, SCM index
, SCM value
),
1569 "Store the signed integer @var{value} at index @var{index} "
1570 "of @var{bv} using the native endianness.")
1571 #define FUNC_NAME s_scm_bytevector_s64_native_set_x
1573 LARGE_INTEGER_NATIVE_SET (64, signed);
1579 /* Operations on IEEE-754 numbers. */
1581 /* There are two possible word endians, visible in glibc's <ieee754.h>.
1582 However, in R6RS, when the endianness is `little', little endian is
1583 assumed for both the byte order and the word order. This is clear from
1584 Section 2.1 of R6RS-lib (in response to
1585 http://www.r6rs.org/formal-comments/comment-187.txt). */
1588 /* Convert to/from a floating-point number with different endianness. This
1589 method is probably not the most efficient but it should be portable. */
1592 float_to_foreign_endianness (union scm_ieee754_float
*target
,
1595 union scm_ieee754_float src
;
1599 #ifdef WORDS_BIGENDIAN
1600 /* Assuming little endian for both byte and word order. */
1601 target
->little_endian
.negative
= src
.big_endian
.negative
;
1602 target
->little_endian
.exponent
= src
.big_endian
.exponent
;
1603 target
->little_endian
.mantissa
= src
.big_endian
.mantissa
;
1605 target
->big_endian
.negative
= src
.little_endian
.negative
;
1606 target
->big_endian
.exponent
= src
.little_endian
.exponent
;
1607 target
->big_endian
.mantissa
= src
.little_endian
.mantissa
;
1612 float_from_foreign_endianness (const union scm_ieee754_float
*source
)
1614 union scm_ieee754_float result
;
1616 #ifdef WORDS_BIGENDIAN
1617 /* Assuming little endian for both byte and word order. */
1618 result
.big_endian
.negative
= source
->little_endian
.negative
;
1619 result
.big_endian
.exponent
= source
->little_endian
.exponent
;
1620 result
.big_endian
.mantissa
= source
->little_endian
.mantissa
;
1622 result
.little_endian
.negative
= source
->big_endian
.negative
;
1623 result
.little_endian
.exponent
= source
->big_endian
.exponent
;
1624 result
.little_endian
.mantissa
= source
->big_endian
.mantissa
;
1631 double_to_foreign_endianness (union scm_ieee754_double
*target
,
1634 union scm_ieee754_double src
;
1638 #ifdef WORDS_BIGENDIAN
1639 /* Assuming little endian for both byte and word order. */
1640 target
->little_little_endian
.negative
= src
.big_endian
.negative
;
1641 target
->little_little_endian
.exponent
= src
.big_endian
.exponent
;
1642 target
->little_little_endian
.mantissa0
= src
.big_endian
.mantissa0
;
1643 target
->little_little_endian
.mantissa1
= src
.big_endian
.mantissa1
;
1645 target
->big_endian
.negative
= src
.little_little_endian
.negative
;
1646 target
->big_endian
.exponent
= src
.little_little_endian
.exponent
;
1647 target
->big_endian
.mantissa0
= src
.little_little_endian
.mantissa0
;
1648 target
->big_endian
.mantissa1
= src
.little_little_endian
.mantissa1
;
1652 static inline double
1653 double_from_foreign_endianness (const union scm_ieee754_double
*source
)
1655 union scm_ieee754_double result
;
1657 #ifdef WORDS_BIGENDIAN
1658 /* Assuming little endian for both byte and word order. */
1659 result
.big_endian
.negative
= source
->little_little_endian
.negative
;
1660 result
.big_endian
.exponent
= source
->little_little_endian
.exponent
;
1661 result
.big_endian
.mantissa0
= source
->little_little_endian
.mantissa0
;
1662 result
.big_endian
.mantissa1
= source
->little_little_endian
.mantissa1
;
1664 result
.little_little_endian
.negative
= source
->big_endian
.negative
;
1665 result
.little_little_endian
.exponent
= source
->big_endian
.exponent
;
1666 result
.little_little_endian
.mantissa0
= source
->big_endian
.mantissa0
;
1667 result
.little_little_endian
.mantissa1
= source
->big_endian
.mantissa1
;
1673 /* Template macros to abstract over doubles and floats.
1674 XXX: Guile can only convert to/from doubles. */
1675 #define IEEE754_UNION(_c_type) union scm_ieee754_ ## _c_type
1676 #define IEEE754_TO_SCM(_c_type) scm_from_double
1677 #define IEEE754_FROM_SCM(_c_type) scm_to_double
1678 #define IEEE754_FROM_FOREIGN_ENDIANNESS(_c_type) \
1679 _c_type ## _from_foreign_endianness
1680 #define IEEE754_TO_FOREIGN_ENDIANNESS(_c_type) \
1681 _c_type ## _to_foreign_endianness
1684 /* FIXME: SCM_VALIDATE_REAL rejects integers, etc. grrr */
1685 #define VALIDATE_REAL(pos, v) \
1687 SCM_ASSERT_TYPE (scm_is_real (v), v, pos, FUNC_NAME, "real"); \
1690 /* Templace getters and setters. */
1692 #define IEEE754_ACCESSOR_PROLOGUE(_type) \
1693 INTEGER_ACCESSOR_PROLOGUE (sizeof (_type) << 3UL, signed);
1695 #define IEEE754_REF(_type) \
1698 IEEE754_ACCESSOR_PROLOGUE (_type); \
1699 SCM_VALIDATE_SYMBOL (3, endianness); \
1701 if (scm_is_eq (endianness, scm_i_native_endianness)) \
1702 memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \
1705 IEEE754_UNION (_type) c_raw; \
1707 memcpy (&c_raw, &c_bv[c_index], sizeof (c_raw)); \
1709 IEEE754_FROM_FOREIGN_ENDIANNESS (_type) (&c_raw); \
1712 return (IEEE754_TO_SCM (_type) (c_result));
1714 #define IEEE754_NATIVE_REF(_type) \
1717 IEEE754_ACCESSOR_PROLOGUE (_type); \
1719 memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \
1720 return (IEEE754_TO_SCM (_type) (c_result));
1722 #define IEEE754_SET(_type) \
1725 IEEE754_ACCESSOR_PROLOGUE (_type); \
1726 VALIDATE_REAL (3, value); \
1727 SCM_VALIDATE_SYMBOL (4, endianness); \
1728 c_value = IEEE754_FROM_SCM (_type) (value); \
1730 if (scm_is_eq (endianness, scm_i_native_endianness)) \
1731 memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \
1734 IEEE754_UNION (_type) c_raw; \
1736 IEEE754_TO_FOREIGN_ENDIANNESS (_type) (&c_raw, c_value); \
1737 memcpy (&c_bv[c_index], &c_raw, sizeof (c_raw)); \
1740 return SCM_UNSPECIFIED;
1742 #define IEEE754_NATIVE_SET(_type) \
1745 IEEE754_ACCESSOR_PROLOGUE (_type); \
1746 VALIDATE_REAL (3, value); \
1747 c_value = IEEE754_FROM_SCM (_type) (value); \
1749 memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \
1750 return SCM_UNSPECIFIED;
1753 /* Single precision. */
1755 SCM_DEFINE (scm_bytevector_ieee_single_ref
,
1756 "bytevector-ieee-single-ref",
1758 (SCM bv
, SCM index
, SCM endianness
),
1759 "Return the IEEE-754 single from @var{bv} at "
1761 #define FUNC_NAME s_scm_bytevector_ieee_single_ref
1763 IEEE754_REF (float);
1767 SCM_DEFINE (scm_bytevector_ieee_single_native_ref
,
1768 "bytevector-ieee-single-native-ref",
1770 (SCM bv
, SCM index
),
1771 "Return the IEEE-754 single from @var{bv} at "
1772 "@var{index} using the native endianness.")
1773 #define FUNC_NAME s_scm_bytevector_ieee_single_native_ref
1775 IEEE754_NATIVE_REF (float);
1779 SCM_DEFINE (scm_bytevector_ieee_single_set_x
,
1780 "bytevector-ieee-single-set!",
1782 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1783 "Store real @var{value} in @var{bv} at @var{index} according to "
1784 "@var{endianness}.")
1785 #define FUNC_NAME s_scm_bytevector_ieee_single_set_x
1787 IEEE754_SET (float);
1791 SCM_DEFINE (scm_bytevector_ieee_single_native_set_x
,
1792 "bytevector-ieee-single-native-set!",
1794 (SCM bv
, SCM index
, SCM value
),
1795 "Store the real @var{value} at index @var{index} "
1796 "of @var{bv} using the native endianness.")
1797 #define FUNC_NAME s_scm_bytevector_ieee_single_native_set_x
1799 IEEE754_NATIVE_SET (float);
1804 /* Double precision. */
1806 SCM_DEFINE (scm_bytevector_ieee_double_ref
,
1807 "bytevector-ieee-double-ref",
1809 (SCM bv
, SCM index
, SCM endianness
),
1810 "Return the IEEE-754 double from @var{bv} at "
1812 #define FUNC_NAME s_scm_bytevector_ieee_double_ref
1814 IEEE754_REF (double);
1818 SCM_DEFINE (scm_bytevector_ieee_double_native_ref
,
1819 "bytevector-ieee-double-native-ref",
1821 (SCM bv
, SCM index
),
1822 "Return the IEEE-754 double from @var{bv} at "
1823 "@var{index} using the native endianness.")
1824 #define FUNC_NAME s_scm_bytevector_ieee_double_native_ref
1826 IEEE754_NATIVE_REF (double);
1830 SCM_DEFINE (scm_bytevector_ieee_double_set_x
,
1831 "bytevector-ieee-double-set!",
1833 (SCM bv
, SCM index
, SCM value
, SCM endianness
),
1834 "Store real @var{value} in @var{bv} at @var{index} according to "
1835 "@var{endianness}.")
1836 #define FUNC_NAME s_scm_bytevector_ieee_double_set_x
1838 IEEE754_SET (double);
1842 SCM_DEFINE (scm_bytevector_ieee_double_native_set_x
,
1843 "bytevector-ieee-double-native-set!",
1845 (SCM bv
, SCM index
, SCM value
),
1846 "Store the real @var{value} at index @var{index} "
1847 "of @var{bv} using the native endianness.")
1848 #define FUNC_NAME s_scm_bytevector_ieee_double_native_set_x
1850 IEEE754_NATIVE_SET (double);
1855 #undef IEEE754_UNION
1856 #undef IEEE754_TO_SCM
1857 #undef IEEE754_FROM_SCM
1858 #undef IEEE754_FROM_FOREIGN_ENDIANNESS
1859 #undef IEEE754_TO_FOREIGN_ENDIANNESS
1861 #undef IEEE754_NATIVE_REF
1863 #undef IEEE754_NATIVE_SET
1866 /* Operations on strings. */
1869 /* Produce a function that returns the length of a UTF-encoded string. */
1870 #define UTF_STRLEN_FUNCTION(_utf_width) \
1871 static inline size_t \
1872 utf ## _utf_width ## _strlen (const uint ## _utf_width ## _t *str) \
1875 const uint ## _utf_width ## _t *ptr; \
1883 return (len * ((_utf_width) / 8)); \
1886 UTF_STRLEN_FUNCTION (8)
1889 /* Return the length (in bytes) of STR, a UTF-(UTF_WIDTH) encoded string. */
1890 #define UTF_STRLEN(_utf_width, _str) \
1891 utf ## _utf_width ## _strlen (_str)
1893 /* Return the "portable" name of the UTF encoding of size UTF_WIDTH and
1894 ENDIANNESS (Gnulib's `iconv_open' module guarantees the portability of the
1897 utf_encoding_name (char *name
, size_t utf_width
, SCM endianness
)
1899 strcpy (name
, "UTF-");
1900 strcat (name
, ((utf_width
== 8)
1902 : ((utf_width
== 16)
1904 : ((utf_width
== 32)
1908 ((scm_is_eq (endianness
, scm_sym_big
))
1910 : ((scm_is_eq (endianness
, scm_sym_little
))
1915 /* Maximum length of a UTF encoding name. */
1916 #define MAX_UTF_ENCODING_NAME_LEN 16
1918 /* Produce the body of a `string->utf' function. */
1919 #define STRING_TO_UTF(_utf_width) \
1922 char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \
1923 char *c_utf = NULL; \
1924 size_t c_strlen, c_utf_len = 0; \
1926 SCM_VALIDATE_STRING (1, str); \
1927 if (scm_is_eq (endianness, SCM_UNDEFINED)) \
1928 endianness = scm_sym_big; \
1930 SCM_VALIDATE_SYMBOL (2, endianness); \
1932 utf_encoding_name (c_utf_name, (_utf_width), endianness); \
1934 c_strlen = scm_i_string_length (str); \
1935 if (scm_i_is_narrow_string (str)) \
1937 err = mem_iconveh (scm_i_string_chars (str), c_strlen, \
1938 "ISO-8859-1", c_utf_name, \
1939 iconveh_question_mark, NULL, \
1940 &c_utf, &c_utf_len); \
1941 if (SCM_UNLIKELY (err)) \
1942 scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \
1943 scm_list_1 (str), err); \
1947 const scm_t_wchar *wbuf = scm_i_string_wide_chars (str); \
1948 c_utf = u32_conv_to_encoding (c_utf_name, \
1949 iconveh_question_mark, \
1950 (scm_t_uint32 *) wbuf, \
1951 c_strlen, NULL, NULL, &c_utf_len); \
1952 if (SCM_UNLIKELY (c_utf == NULL)) \
1953 scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \
1954 scm_list_1 (str), errno); \
1956 scm_dynwind_begin (0); \
1957 scm_dynwind_free (c_utf); \
1958 utf = make_bytevector (c_utf_len, SCM_ARRAY_ELEMENT_TYPE_VU8); \
1959 memcpy (SCM_BYTEVECTOR_CONTENTS (utf), c_utf, c_utf_len); \
1960 scm_dynwind_end (); \
1966 SCM_DEFINE (scm_string_to_utf8
, "string->utf8",
1969 "Return a newly allocated bytevector that contains the UTF-8 "
1970 "encoding of @var{str}.")
1971 #define FUNC_NAME s_scm_string_to_utf8
1975 size_t c_strlen
, c_utf_len
= 0;
1977 SCM_VALIDATE_STRING (1, str
);
1979 c_strlen
= scm_i_string_length (str
);
1980 if (scm_i_is_narrow_string (str
))
1981 c_utf
= u8_conv_from_encoding ("ISO-8859-1", iconveh_question_mark
,
1982 scm_i_string_chars (str
), c_strlen
,
1983 NULL
, NULL
, &c_utf_len
);
1986 const scm_t_wchar
*wbuf
= scm_i_string_wide_chars (str
);
1987 c_utf
= u32_to_u8 ((const uint32_t *) wbuf
, c_strlen
, NULL
, &c_utf_len
);
1989 if (SCM_UNLIKELY (c_utf
== NULL
))
1990 scm_syserror (FUNC_NAME
);
1993 scm_dynwind_begin (0);
1994 scm_dynwind_free (c_utf
);
1996 utf
= make_bytevector (c_utf_len
, SCM_ARRAY_ELEMENT_TYPE_VU8
);
1997 memcpy (SCM_BYTEVECTOR_CONTENTS (utf
), c_utf
, c_utf_len
);
2006 SCM_DEFINE (scm_string_to_utf16
, "string->utf16",
2008 (SCM str
, SCM endianness
),
2009 "Return a newly allocated bytevector that contains the UTF-16 "
2010 "encoding of @var{str}.")
2011 #define FUNC_NAME s_scm_string_to_utf16
2017 SCM_DEFINE (scm_string_to_utf32
, "string->utf32",
2019 (SCM str
, SCM endianness
),
2020 "Return a newly allocated bytevector that contains the UTF-32 "
2021 "encoding of @var{str}.")
2022 #define FUNC_NAME s_scm_string_to_utf32
2029 /* Produce the body of a function that converts a UTF-encoded bytevector to a
2031 #define UTF_TO_STRING(_utf_width) \
2032 SCM str = SCM_BOOL_F; \
2034 char *c_str = NULL; \
2035 char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \
2037 size_t c_strlen = 0, c_utf_len = 0; \
2039 SCM_VALIDATE_BYTEVECTOR (1, utf); \
2040 if (scm_is_eq (endianness, SCM_UNDEFINED)) \
2041 endianness = scm_sym_big; \
2043 SCM_VALIDATE_SYMBOL (2, endianness); \
2045 c_utf_len = SCM_BYTEVECTOR_LENGTH (utf); \
2046 c_utf = (char *) SCM_BYTEVECTOR_CONTENTS (utf); \
2047 utf_encoding_name (c_utf_name, (_utf_width), endianness); \
2049 err = mem_iconveh (c_utf, c_utf_len, \
2050 c_utf_name, "UTF-8", \
2051 iconveh_question_mark, NULL, \
2052 &c_str, &c_strlen); \
2053 if (SCM_UNLIKELY (err)) \
2054 scm_syserror_msg (FUNC_NAME, "failed to convert to string: ~A", \
2055 scm_list_1 (utf), err); \
2058 str = scm_from_stringn (c_str, c_strlen, "UTF-8", \
2059 SCM_FAILED_CONVERSION_ERROR); \
2065 SCM_DEFINE (scm_utf8_to_string
, "utf8->string",
2068 "Return a newly allocate string that contains from the UTF-8-"
2069 "encoded contents of bytevector @var{utf}.")
2070 #define FUNC_NAME s_scm_utf8_to_string
2074 size_t c_utf_len
= 0;
2076 SCM_VALIDATE_BYTEVECTOR (1, utf
);
2078 c_utf_len
= SCM_BYTEVECTOR_LENGTH (utf
);
2079 c_utf
= (char *) SCM_BYTEVECTOR_CONTENTS (utf
);
2080 str
= scm_from_stringn (c_utf
, c_utf_len
, "UTF-8",
2081 SCM_FAILED_CONVERSION_ERROR
);
2087 SCM_DEFINE (scm_utf16_to_string
, "utf16->string",
2089 (SCM utf
, SCM endianness
),
2090 "Return a newly allocate string that contains from the UTF-16-"
2091 "encoded contents of bytevector @var{utf}.")
2092 #define FUNC_NAME s_scm_utf16_to_string
2098 SCM_DEFINE (scm_utf32_to_string
, "utf32->string",
2100 (SCM utf
, SCM endianness
),
2101 "Return a newly allocate string that contains from the UTF-32-"
2102 "encoded contents of bytevector @var{utf}.")
2103 #define FUNC_NAME s_scm_utf32_to_string
2110 /* Bytevectors as generalized vectors & arrays. */
2112 #define COMPLEX_ACCESSOR_PROLOGUE(_type) \
2113 size_t c_len, c_index; \
2116 SCM_VALIDATE_BYTEVECTOR (1, bv); \
2117 c_index = scm_to_size_t (index); \
2119 c_len = SCM_BYTEVECTOR_LENGTH (bv); \
2120 c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
2122 if (SCM_UNLIKELY (c_index + 2 * sizeof (_type) - 1 >= c_len)) \
2123 scm_out_of_range (FUNC_NAME, index);
2125 /* Template for native access to complex numbers of type TYPE. */
2126 #define COMPLEX_NATIVE_REF(_type) \
2129 COMPLEX_ACCESSOR_PROLOGUE (_type); \
2134 memcpy (&real, &c_bv[c_index], sizeof (_type)); \
2135 memcpy (&imag, &c_bv[c_index + sizeof (_type)], sizeof (_type)); \
2137 result = scm_c_make_rectangular (real, imag); \
2143 bytevector_ref_c32 (SCM bv
, SCM index
)
2144 #define FUNC_NAME "bytevector_ref_c32"
2146 COMPLEX_NATIVE_REF (float);
2151 bytevector_ref_c64 (SCM bv
, SCM index
)
2152 #define FUNC_NAME "bytevector_ref_c64"
2154 COMPLEX_NATIVE_REF (double);
2158 typedef SCM (*scm_t_bytevector_ref_fn
)(SCM
, SCM
);
2160 static const scm_t_bytevector_ref_fn
2161 bytevector_ref_fns
[SCM_ARRAY_ELEMENT_TYPE_LAST
+ 1] =
2166 scm_bytevector_u8_ref
, /* VU8 */
2167 scm_bytevector_u8_ref
, /* U8 */
2168 scm_bytevector_s8_ref
,
2169 scm_bytevector_u16_native_ref
,
2170 scm_bytevector_s16_native_ref
,
2171 scm_bytevector_u32_native_ref
,
2172 scm_bytevector_s32_native_ref
,
2173 scm_bytevector_u64_native_ref
,
2174 scm_bytevector_s64_native_ref
,
2175 scm_bytevector_ieee_single_native_ref
,
2176 scm_bytevector_ieee_double_native_ref
,
2182 bv_handle_ref (scm_t_array_handle
*h
, size_t index
)
2185 scm_t_bytevector_ref_fn ref_fn
;
2187 ref_fn
= bytevector_ref_fns
[h
->element_type
];
2189 scm_from_size_t (index
* scm_array_handle_uniform_element_size (h
));
2190 return ref_fn (h
->array
, byte_index
);
2193 /* Template for native modification of complex numbers of type TYPE. */
2194 #define COMPLEX_NATIVE_SET(_type) \
2195 COMPLEX_ACCESSOR_PROLOGUE (_type); \
2199 real = scm_c_real_part (value); \
2200 imag = scm_c_imag_part (value); \
2202 memcpy (&c_bv[c_index], &real, sizeof (_type)); \
2203 memcpy (&c_bv[c_index + sizeof (_type)], &imag, sizeof (_type)); \
2206 return SCM_UNSPECIFIED;
2209 bytevector_set_c32 (SCM bv
, SCM index
, SCM value
)
2210 #define FUNC_NAME "bytevector_set_c32"
2212 COMPLEX_NATIVE_SET (float);
2217 bytevector_set_c64 (SCM bv
, SCM index
, SCM value
)
2218 #define FUNC_NAME "bytevector_set_c64"
2220 COMPLEX_NATIVE_SET (double);
2224 typedef SCM (*scm_t_bytevector_set_fn
)(SCM
, SCM
, SCM
);
2226 const scm_t_bytevector_set_fn bytevector_set_fns
[SCM_ARRAY_ELEMENT_TYPE_LAST
+ 1] =
2231 scm_bytevector_u8_set_x
, /* VU8 */
2232 scm_bytevector_u8_set_x
, /* U8 */
2233 scm_bytevector_s8_set_x
,
2234 scm_bytevector_u16_native_set_x
,
2235 scm_bytevector_s16_native_set_x
,
2236 scm_bytevector_u32_native_set_x
,
2237 scm_bytevector_s32_native_set_x
,
2238 scm_bytevector_u64_native_set_x
,
2239 scm_bytevector_s64_native_set_x
,
2240 scm_bytevector_ieee_single_native_set_x
,
2241 scm_bytevector_ieee_double_native_set_x
,
2247 bv_handle_set_x (scm_t_array_handle
*h
, size_t index
, SCM val
)
2250 scm_t_bytevector_set_fn set_fn
;
2252 set_fn
= bytevector_set_fns
[h
->element_type
];
2254 scm_from_size_t (index
* scm_array_handle_uniform_element_size (h
));
2255 set_fn (h
->array
, byte_index
, val
);
2259 bytevector_get_handle (SCM v
, scm_t_array_handle
*h
)
2265 h
->dim0
.ubnd
= SCM_BYTEVECTOR_TYPED_LENGTH (v
) - 1;
2267 h
->element_type
= SCM_BYTEVECTOR_ELEMENT_TYPE (v
);
2268 h
->elements
= h
->writable_elements
= SCM_BYTEVECTOR_CONTENTS (v
);
2272 /* Initialization. */
2275 scm_bootstrap_bytevectors (void)
2277 /* This must be instantiated here because the generalized-vector API may
2278 want to access bytevectors even though `(rnrs bytevectors)' hasn't been
2280 scm_null_bytevector
= make_bytevector (0, SCM_ARRAY_ELEMENT_TYPE_VU8
);
2282 #ifdef WORDS_BIGENDIAN
2283 scm_i_native_endianness
= scm_from_latin1_symbol ("big");
2285 scm_i_native_endianness
= scm_from_latin1_symbol ("little");
2288 scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION
,
2289 "scm_init_bytevectors",
2290 (scm_t_extension_init_func
) scm_init_bytevectors
,
2294 scm_t_array_implementation impl
;
2296 impl
.tag
= scm_tc7_bytevector
;
2298 impl
.vref
= bv_handle_ref
;
2299 impl
.vset
= bv_handle_set_x
;
2300 impl
.get_handle
= bytevector_get_handle
;
2301 scm_i_register_array_implementation (&impl
);
2302 scm_i_register_vector_constructor
2303 (scm_i_array_element_types
[SCM_ARRAY_ELEMENT_TYPE_VU8
],
2304 scm_make_bytevector
);
2309 scm_init_bytevectors (void)
2311 #include "libguile/bytevectors.x"
2313 scm_endianness_big
= scm_sym_big
;
2314 scm_endianness_little
= scm_sym_little
;