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1ee2c72e LC |
1 | /* Copyright (C) 2009 Free Software Foundation, Inc. |
2 | * | |
3 | * This library is free software; you can redistribute it and/or | |
53befeb7 NJ |
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. | |
1ee2c72e | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
1ee2c72e LC |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
12 | * | |
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 | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
1ee2c72e LC |
17 | */ |
18 | ||
19 | ||
20 | #ifdef HAVE_CONFIG_H | |
21 | # include <config.h> | |
22 | #endif | |
23 | ||
24 | #include <alloca.h> | |
25 | ||
26 | #include <gmp.h> | |
27 | ||
28 | #include "libguile/_scm.h" | |
cfb4702f | 29 | #include "libguile/extensions.h" |
1ee2c72e LC |
30 | #include "libguile/bytevectors.h" |
31 | #include "libguile/strings.h" | |
32 | #include "libguile/validate.h" | |
33 | #include "libguile/ieee-754.h" | |
2fa901a5 | 34 | #include "libguile/arrays.h" |
2a610be5 | 35 | #include "libguile/array-handle.h" |
782a82ee | 36 | #include "libguile/srfi-4.h" |
1ee2c72e LC |
37 | |
38 | #include <byteswap.h> | |
39 | #include <striconveh.h> | |
40 | #include <uniconv.h> | |
41 | ||
42 | #ifdef HAVE_LIMITS_H | |
43 | # include <limits.h> | |
44 | #else | |
45 | /* Assuming 32-bit longs. */ | |
46 | # define ULONG_MAX 4294967295UL | |
47 | #endif | |
48 | ||
49 | #include <string.h> | |
50 | ||
51 | ||
52 | \f | |
53 | /* Utilities. */ | |
54 | ||
55 | /* Convenience macros. These are used by the various templates (macros) that | |
56 | are parameterized by integer signedness. */ | |
57 | #define INT8_T_signed scm_t_int8 | |
58 | #define INT8_T_unsigned scm_t_uint8 | |
59 | #define INT16_T_signed scm_t_int16 | |
60 | #define INT16_T_unsigned scm_t_uint16 | |
61 | #define INT32_T_signed scm_t_int32 | |
62 | #define INT32_T_unsigned scm_t_uint32 | |
63 | #define is_signed_int8(_x) (((_x) >= -128L) && ((_x) <= 127L)) | |
64 | #define is_unsigned_int8(_x) ((_x) <= 255UL) | |
65 | #define is_signed_int16(_x) (((_x) >= -32768L) && ((_x) <= 32767L)) | |
66 | #define is_unsigned_int16(_x) ((_x) <= 65535UL) | |
67 | #define is_signed_int32(_x) (((_x) >= -2147483648L) && ((_x) <= 2147483647L)) | |
68 | #define is_unsigned_int32(_x) ((_x) <= 4294967295UL) | |
69 | #define SIGNEDNESS_signed 1 | |
70 | #define SIGNEDNESS_unsigned 0 | |
71 | ||
72 | #define INT_TYPE(_size, _sign) INT ## _size ## _T_ ## _sign | |
73 | #define INT_SWAP(_size) bswap_ ## _size | |
74 | #define INT_VALID_P(_size, _sign) is_ ## _sign ## _int ## _size | |
75 | #define SIGNEDNESS(_sign) SIGNEDNESS_ ## _sign | |
76 | ||
77 | ||
78 | #define INTEGER_ACCESSOR_PROLOGUE(_len, _sign) \ | |
2d34e924 | 79 | size_t c_len, c_index; \ |
1ee2c72e LC |
80 | _sign char *c_bv; \ |
81 | \ | |
82 | SCM_VALIDATE_BYTEVECTOR (1, bv); \ | |
83 | c_index = scm_to_uint (index); \ | |
84 | \ | |
85 | c_len = SCM_BYTEVECTOR_LENGTH (bv); \ | |
86 | c_bv = (_sign char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
87 | \ | |
88 | if (SCM_UNLIKELY (c_index + ((_len) >> 3UL) - 1 >= c_len)) \ | |
89 | scm_out_of_range (FUNC_NAME, index); | |
90 | ||
91 | /* Template for fixed-size integer access (only 8, 16 or 32-bit). */ | |
caa92f5e AW |
92 | #define INTEGER_REF(_len, _sign) \ |
93 | SCM result; \ | |
94 | \ | |
95 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
96 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
97 | \ | |
98 | { \ | |
99 | INT_TYPE (_len, _sign) c_result; \ | |
100 | \ | |
101 | memcpy (&c_result, &c_bv[c_index], (_len) / 8); \ | |
102 | if (!scm_is_eq (endianness, scm_i_native_endianness)) \ | |
103 | c_result = INT_SWAP (_len) (c_result); \ | |
104 | \ | |
105 | result = SCM_I_MAKINUM (c_result); \ | |
106 | } \ | |
107 | \ | |
1ee2c72e LC |
108 | return result; |
109 | ||
110 | /* Template for fixed-size integer access using the native endianness. */ | |
111 | #define INTEGER_NATIVE_REF(_len, _sign) \ | |
112 | SCM result; \ | |
113 | \ | |
114 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
115 | \ | |
116 | { \ | |
117 | INT_TYPE (_len, _sign) c_result; \ | |
118 | \ | |
119 | memcpy (&c_result, &c_bv[c_index], (_len) / 8); \ | |
120 | result = SCM_I_MAKINUM (c_result); \ | |
121 | } \ | |
122 | \ | |
123 | return result; | |
124 | ||
125 | /* Template for fixed-size integer modification (only 8, 16 or 32-bit). */ | |
126 | #define INTEGER_SET(_len, _sign) \ | |
127 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
128 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
129 | \ | |
130 | { \ | |
131 | _sign long c_value; \ | |
132 | INT_TYPE (_len, _sign) c_value_short; \ | |
133 | \ | |
134 | if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \ | |
135 | scm_wrong_type_arg (FUNC_NAME, 3, value); \ | |
136 | \ | |
137 | c_value = SCM_I_INUM (value); \ | |
138 | if (SCM_UNLIKELY (!INT_VALID_P (_len, _sign) (c_value))) \ | |
139 | scm_out_of_range (FUNC_NAME, value); \ | |
140 | \ | |
141 | c_value_short = (INT_TYPE (_len, _sign)) c_value; \ | |
caa92f5e | 142 | if (!scm_is_eq (endianness, scm_i_native_endianness)) \ |
1ee2c72e LC |
143 | c_value_short = INT_SWAP (_len) (c_value_short); \ |
144 | \ | |
145 | memcpy (&c_bv[c_index], &c_value_short, (_len) / 8); \ | |
146 | } \ | |
147 | \ | |
148 | return SCM_UNSPECIFIED; | |
149 | ||
150 | /* Template for fixed-size integer modification using the native | |
151 | endianness. */ | |
152 | #define INTEGER_NATIVE_SET(_len, _sign) \ | |
153 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
154 | \ | |
155 | { \ | |
156 | _sign long c_value; \ | |
157 | INT_TYPE (_len, _sign) c_value_short; \ | |
158 | \ | |
159 | if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \ | |
160 | scm_wrong_type_arg (FUNC_NAME, 3, value); \ | |
161 | \ | |
162 | c_value = SCM_I_INUM (value); \ | |
163 | if (SCM_UNLIKELY (!INT_VALID_P (_len, _sign) (c_value))) \ | |
164 | scm_out_of_range (FUNC_NAME, value); \ | |
165 | \ | |
166 | c_value_short = (INT_TYPE (_len, _sign)) c_value; \ | |
167 | \ | |
168 | memcpy (&c_bv[c_index], &c_value_short, (_len) / 8); \ | |
169 | } \ | |
170 | \ | |
171 | return SCM_UNSPECIFIED; | |
172 | ||
173 | ||
174 | \f | |
175 | /* Bytevector type. */ | |
176 | ||
cfb4702f | 177 | scm_t_bits scm_tc16_bytevector; |
1ee2c72e LC |
178 | |
179 | #define SCM_BYTEVECTOR_SET_LENGTH(_bv, _len) \ | |
180 | SCM_SET_SMOB_DATA ((_bv), (scm_t_bits) (_len)) | |
181 | #define SCM_BYTEVECTOR_SET_CONTENTS(_bv, _buf) \ | |
182 | SCM_SET_SMOB_DATA_2 ((_bv), (scm_t_bits) (_buf)) | |
183 | ||
184 | /* The empty bytevector. */ | |
185 | SCM scm_null_bytevector = SCM_UNSPECIFIED; | |
186 | ||
187 | ||
188 | static inline SCM | |
2d34e924 | 189 | make_bytevector_from_buffer (size_t len, signed char *contents) |
1ee2c72e LC |
190 | { |
191 | /* Assuming LEN > SCM_BYTEVECTOR_INLINE_THRESHOLD. */ | |
192 | SCM_RETURN_NEWSMOB2 (scm_tc16_bytevector, len, contents); | |
193 | } | |
194 | ||
195 | static inline SCM | |
2d34e924 | 196 | make_bytevector (size_t len) |
1ee2c72e LC |
197 | { |
198 | SCM bv; | |
199 | ||
200 | if (SCM_UNLIKELY (len == 0)) | |
201 | bv = scm_null_bytevector; | |
202 | else | |
203 | { | |
204 | signed char *contents = NULL; | |
205 | ||
206 | if (!SCM_BYTEVECTOR_INLINEABLE_SIZE_P (len)) | |
207 | contents = (signed char *) scm_gc_malloc (len, SCM_GC_BYTEVECTOR); | |
208 | ||
209 | bv = make_bytevector_from_buffer (len, contents); | |
210 | } | |
211 | ||
212 | return bv; | |
213 | } | |
214 | ||
215 | /* Return a new bytevector of size LEN octets. */ | |
216 | SCM | |
2d34e924 | 217 | scm_c_make_bytevector (size_t len) |
1ee2c72e LC |
218 | { |
219 | return (make_bytevector (len)); | |
220 | } | |
221 | ||
222 | /* Return a bytevector of size LEN made up of CONTENTS. The area pointed to | |
223 | by CONTENTS must have been allocated using `scm_gc_malloc ()'. */ | |
224 | SCM | |
2d34e924 | 225 | scm_c_take_bytevector (signed char *contents, size_t len) |
1ee2c72e LC |
226 | { |
227 | SCM bv; | |
228 | ||
229 | if (SCM_UNLIKELY (SCM_BYTEVECTOR_INLINEABLE_SIZE_P (len))) | |
230 | { | |
231 | /* Copy CONTENTS into an "in-line" buffer, then free CONTENTS. */ | |
232 | signed char *c_bv; | |
233 | ||
234 | bv = make_bytevector (len); | |
235 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
236 | memcpy (c_bv, contents, len); | |
237 | scm_gc_free (contents, len, SCM_GC_BYTEVECTOR); | |
238 | } | |
239 | else | |
240 | bv = make_bytevector_from_buffer (len, contents); | |
241 | ||
242 | return bv; | |
243 | } | |
244 | ||
245 | /* Shrink BV to C_NEW_LEN (which is assumed to be smaller than its current | |
246 | size) and return BV. */ | |
247 | SCM | |
2d34e924 | 248 | scm_i_shrink_bytevector (SCM bv, size_t c_new_len) |
1ee2c72e LC |
249 | { |
250 | if (!SCM_BYTEVECTOR_INLINE_P (bv)) | |
251 | { | |
2d34e924 | 252 | size_t c_len; |
1ee2c72e LC |
253 | signed char *c_bv, *c_new_bv; |
254 | ||
255 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
256 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
257 | ||
258 | SCM_BYTEVECTOR_SET_LENGTH (bv, c_new_len); | |
259 | ||
260 | if (SCM_BYTEVECTOR_INLINEABLE_SIZE_P (c_new_len)) | |
261 | { | |
262 | /* Copy to the in-line buffer and free the current buffer. */ | |
263 | c_new_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
264 | memcpy (c_new_bv, c_bv, c_new_len); | |
265 | scm_gc_free (c_bv, c_len, SCM_GC_BYTEVECTOR); | |
266 | } | |
267 | else | |
268 | { | |
269 | /* Resize the existing buffer. */ | |
270 | c_new_bv = scm_gc_realloc (c_bv, c_len, c_new_len, | |
271 | SCM_GC_BYTEVECTOR); | |
272 | SCM_BYTEVECTOR_SET_CONTENTS (bv, c_new_bv); | |
273 | } | |
274 | } | |
275 | ||
276 | return bv; | |
277 | } | |
278 | ||
404bb5f8 LC |
279 | int |
280 | scm_is_bytevector (SCM obj) | |
281 | { | |
282 | return SCM_SMOB_PREDICATE (scm_tc16_bytevector, obj); | |
283 | } | |
284 | ||
285 | size_t | |
286 | scm_c_bytevector_length (SCM bv) | |
287 | #define FUNC_NAME "scm_c_bytevector_length" | |
288 | { | |
289 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
290 | ||
291 | return SCM_BYTEVECTOR_LENGTH (bv); | |
292 | } | |
293 | #undef FUNC_NAME | |
294 | ||
295 | scm_t_uint8 | |
296 | scm_c_bytevector_ref (SCM bv, size_t index) | |
297 | #define FUNC_NAME "scm_c_bytevector_ref" | |
298 | { | |
299 | size_t c_len; | |
300 | const scm_t_uint8 *c_bv; | |
301 | ||
302 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
303 | ||
304 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
305 | c_bv = (scm_t_uint8 *) SCM_BYTEVECTOR_CONTENTS (bv); | |
306 | ||
307 | if (SCM_UNLIKELY (index >= c_len)) | |
308 | scm_out_of_range (FUNC_NAME, scm_from_size_t (index)); | |
309 | ||
310 | return c_bv[index]; | |
311 | } | |
312 | #undef FUNC_NAME | |
313 | ||
314 | void | |
315 | scm_c_bytevector_set_x (SCM bv, size_t index, scm_t_uint8 value) | |
316 | #define FUNC_NAME "scm_c_bytevector_set_x" | |
317 | { | |
318 | size_t c_len; | |
319 | scm_t_uint8 *c_bv; | |
320 | ||
321 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
322 | ||
323 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
324 | c_bv = (scm_t_uint8 *) SCM_BYTEVECTOR_CONTENTS (bv); | |
325 | ||
326 | if (SCM_UNLIKELY (index >= c_len)) | |
327 | scm_out_of_range (FUNC_NAME, scm_from_size_t (index)); | |
328 | ||
329 | c_bv[index] = value; | |
330 | } | |
331 | #undef FUNC_NAME | |
332 | ||
438974d0 LC |
333 | /* This procedure is used by `scm_c_generalized_vector_set_x ()'. */ |
334 | void | |
335 | scm_i_bytevector_generalized_set_x (SCM bv, size_t index, SCM value) | |
336 | #define FUNC_NAME "scm_i_bytevector_generalized_set_x" | |
337 | { | |
338 | scm_c_bytevector_set_x (bv, index, scm_to_uint8 (value)); | |
339 | } | |
340 | #undef FUNC_NAME | |
341 | ||
cfb4702f LC |
342 | static int |
343 | print_bytevector (SCM bv, SCM port, scm_print_state *pstate) | |
1ee2c72e LC |
344 | { |
345 | unsigned c_len, i; | |
346 | unsigned char *c_bv; | |
347 | ||
348 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
349 | c_bv = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv); | |
350 | ||
351 | scm_puts ("#vu8(", port); | |
352 | for (i = 0; i < c_len; i++) | |
353 | { | |
354 | if (i > 0) | |
355 | scm_putc (' ', port); | |
356 | ||
357 | scm_uintprint (c_bv[i], 10, port); | |
358 | } | |
359 | ||
360 | scm_putc (')', port); | |
361 | ||
362 | /* Make GCC think we use it. */ | |
363 | scm_remember_upto_here ((SCM) pstate); | |
364 | ||
365 | return 1; | |
366 | } | |
367 | ||
cfb4702f LC |
368 | static SCM |
369 | bytevector_equal_p (SCM bv1, SCM bv2) | |
55bf8cb7 LC |
370 | { |
371 | return scm_bytevector_eq_p (bv1, bv2); | |
372 | } | |
373 | ||
cfb4702f LC |
374 | static size_t |
375 | free_bytevector (SCM bv) | |
1ee2c72e LC |
376 | { |
377 | ||
378 | if (!SCM_BYTEVECTOR_INLINE_P (bv)) | |
379 | { | |
380 | unsigned c_len; | |
381 | signed char *c_bv; | |
382 | ||
383 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
384 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
385 | ||
386 | scm_gc_free (c_bv, c_len, SCM_GC_BYTEVECTOR); | |
387 | } | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | ||
393 | \f | |
394 | /* General operations. */ | |
395 | ||
396 | SCM_SYMBOL (scm_sym_big, "big"); | |
397 | SCM_SYMBOL (scm_sym_little, "little"); | |
398 | ||
399 | SCM scm_endianness_big, scm_endianness_little; | |
400 | ||
401 | /* Host endianness (a symbol). */ | |
caa92f5e | 402 | SCM scm_i_native_endianness = SCM_UNSPECIFIED; |
1ee2c72e LC |
403 | |
404 | /* Byte-swapping. */ | |
405 | #ifndef bswap_24 | |
406 | # define bswap_24(_x) \ | |
407 | ((((_x) & 0xff0000) >> 16) | \ | |
408 | (((_x) & 0x00ff00)) | \ | |
409 | (((_x) & 0x0000ff) << 16)) | |
410 | #endif | |
411 | ||
412 | ||
413 | SCM_DEFINE (scm_native_endianness, "native-endianness", 0, 0, 0, | |
414 | (void), | |
415 | "Return a symbol denoting the machine's native endianness.") | |
416 | #define FUNC_NAME s_scm_native_endianness | |
417 | { | |
caa92f5e | 418 | return scm_i_native_endianness; |
1ee2c72e LC |
419 | } |
420 | #undef FUNC_NAME | |
421 | ||
422 | SCM_DEFINE (scm_bytevector_p, "bytevector?", 1, 0, 0, | |
423 | (SCM obj), | |
424 | "Return true if @var{obj} is a bytevector.") | |
425 | #define FUNC_NAME s_scm_bytevector_p | |
426 | { | |
404bb5f8 | 427 | return scm_from_bool (scm_is_bytevector (obj)); |
1ee2c72e LC |
428 | } |
429 | #undef FUNC_NAME | |
430 | ||
431 | SCM_DEFINE (scm_make_bytevector, "make-bytevector", 1, 1, 0, | |
432 | (SCM len, SCM fill), | |
433 | "Return a newly allocated bytevector of @var{len} bytes, " | |
434 | "optionally filled with @var{fill}.") | |
435 | #define FUNC_NAME s_scm_make_bytevector | |
436 | { | |
437 | SCM bv; | |
438 | unsigned c_len; | |
439 | signed char c_fill = '\0'; | |
440 | ||
441 | SCM_VALIDATE_UINT_COPY (1, len, c_len); | |
442 | if (fill != SCM_UNDEFINED) | |
443 | { | |
444 | int value; | |
445 | ||
446 | value = scm_to_int (fill); | |
447 | if (SCM_UNLIKELY ((value < -128) || (value > 255))) | |
448 | scm_out_of_range (FUNC_NAME, fill); | |
449 | c_fill = (signed char) value; | |
450 | } | |
451 | ||
452 | bv = make_bytevector (c_len); | |
453 | if (fill != SCM_UNDEFINED) | |
454 | { | |
455 | unsigned i; | |
456 | signed char *contents; | |
457 | ||
458 | contents = SCM_BYTEVECTOR_CONTENTS (bv); | |
459 | for (i = 0; i < c_len; i++) | |
460 | contents[i] = c_fill; | |
461 | } | |
462 | ||
463 | return bv; | |
464 | } | |
465 | #undef FUNC_NAME | |
466 | ||
467 | SCM_DEFINE (scm_bytevector_length, "bytevector-length", 1, 0, 0, | |
468 | (SCM bv), | |
469 | "Return the length (in bytes) of @var{bv}.") | |
470 | #define FUNC_NAME s_scm_bytevector_length | |
471 | { | |
404bb5f8 | 472 | return scm_from_uint (scm_c_bytevector_length (bv)); |
1ee2c72e LC |
473 | } |
474 | #undef FUNC_NAME | |
475 | ||
476 | SCM_DEFINE (scm_bytevector_eq_p, "bytevector=?", 2, 0, 0, | |
477 | (SCM bv1, SCM bv2), | |
478 | "Return is @var{bv1} equals to @var{bv2}---i.e., if they " | |
479 | "have the same length and contents.") | |
480 | #define FUNC_NAME s_scm_bytevector_eq_p | |
481 | { | |
482 | SCM result = SCM_BOOL_F; | |
483 | unsigned c_len1, c_len2; | |
484 | ||
485 | SCM_VALIDATE_BYTEVECTOR (1, bv1); | |
486 | SCM_VALIDATE_BYTEVECTOR (2, bv2); | |
487 | ||
488 | c_len1 = SCM_BYTEVECTOR_LENGTH (bv1); | |
489 | c_len2 = SCM_BYTEVECTOR_LENGTH (bv2); | |
490 | ||
491 | if (c_len1 == c_len2) | |
492 | { | |
493 | signed char *c_bv1, *c_bv2; | |
494 | ||
495 | c_bv1 = SCM_BYTEVECTOR_CONTENTS (bv1); | |
496 | c_bv2 = SCM_BYTEVECTOR_CONTENTS (bv2); | |
497 | ||
498 | result = scm_from_bool (!memcmp (c_bv1, c_bv2, c_len1)); | |
499 | } | |
500 | ||
501 | return result; | |
502 | } | |
503 | #undef FUNC_NAME | |
504 | ||
505 | SCM_DEFINE (scm_bytevector_fill_x, "bytevector-fill!", 2, 0, 0, | |
506 | (SCM bv, SCM fill), | |
507 | "Fill bytevector @var{bv} with @var{fill}, a byte.") | |
508 | #define FUNC_NAME s_scm_bytevector_fill_x | |
509 | { | |
510 | unsigned c_len, i; | |
511 | signed char *c_bv, c_fill; | |
512 | ||
513 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
514 | c_fill = scm_to_int8 (fill); | |
515 | ||
516 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
517 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
518 | ||
519 | for (i = 0; i < c_len; i++) | |
520 | c_bv[i] = c_fill; | |
521 | ||
522 | return SCM_UNSPECIFIED; | |
523 | } | |
524 | #undef FUNC_NAME | |
525 | ||
526 | SCM_DEFINE (scm_bytevector_copy_x, "bytevector-copy!", 5, 0, 0, | |
527 | (SCM source, SCM source_start, SCM target, SCM target_start, | |
528 | SCM len), | |
529 | "Copy @var{len} bytes from @var{source} into @var{target}, " | |
530 | "starting reading from @var{source_start} (a positive index " | |
531 | "within @var{source}) and start writing at " | |
532 | "@var{target_start}.") | |
533 | #define FUNC_NAME s_scm_bytevector_copy_x | |
534 | { | |
535 | unsigned c_len, c_source_len, c_target_len; | |
536 | unsigned c_source_start, c_target_start; | |
537 | signed char *c_source, *c_target; | |
538 | ||
539 | SCM_VALIDATE_BYTEVECTOR (1, source); | |
540 | SCM_VALIDATE_BYTEVECTOR (3, target); | |
541 | ||
542 | c_len = scm_to_uint (len); | |
543 | c_source_start = scm_to_uint (source_start); | |
544 | c_target_start = scm_to_uint (target_start); | |
545 | ||
546 | c_source = SCM_BYTEVECTOR_CONTENTS (source); | |
547 | c_target = SCM_BYTEVECTOR_CONTENTS (target); | |
548 | c_source_len = SCM_BYTEVECTOR_LENGTH (source); | |
549 | c_target_len = SCM_BYTEVECTOR_LENGTH (target); | |
550 | ||
551 | if (SCM_UNLIKELY (c_source_start + c_len > c_source_len)) | |
552 | scm_out_of_range (FUNC_NAME, source_start); | |
553 | if (SCM_UNLIKELY (c_target_start + c_len > c_target_len)) | |
554 | scm_out_of_range (FUNC_NAME, target_start); | |
555 | ||
556 | memcpy (c_target + c_target_start, | |
557 | c_source + c_source_start, | |
558 | c_len); | |
559 | ||
560 | return SCM_UNSPECIFIED; | |
561 | } | |
562 | #undef FUNC_NAME | |
563 | ||
564 | SCM_DEFINE (scm_bytevector_copy, "bytevector-copy", 1, 0, 0, | |
565 | (SCM bv), | |
566 | "Return a newly allocated copy of @var{bv}.") | |
567 | #define FUNC_NAME s_scm_bytevector_copy | |
568 | { | |
569 | SCM copy; | |
570 | unsigned c_len; | |
571 | signed char *c_bv, *c_copy; | |
572 | ||
573 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
574 | ||
575 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
576 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
577 | ||
578 | copy = make_bytevector (c_len); | |
579 | c_copy = SCM_BYTEVECTOR_CONTENTS (copy); | |
580 | memcpy (c_copy, c_bv, c_len); | |
581 | ||
582 | return copy; | |
583 | } | |
584 | #undef FUNC_NAME | |
585 | ||
782a82ee AW |
586 | SCM_DEFINE (scm_uniform_array_to_bytevector, "uniform-array->bytevector", |
587 | 1, 0, 0, (SCM array), | |
588 | "Return a newly allocated bytevector whose contents\n" | |
589 | "will be copied from the uniform array @var{array}.") | |
590 | #define FUNC_NAME s_scm_uniform_array_to_bytevector | |
591 | { | |
592 | SCM contents, ret; | |
593 | size_t len; | |
594 | scm_t_array_handle h; | |
595 | const void *base; | |
596 | size_t sz; | |
597 | ||
598 | contents = scm_array_contents (array, SCM_BOOL_T); | |
599 | if (scm_is_false (contents)) | |
600 | scm_wrong_type_arg_msg (FUNC_NAME, 0, array, "uniform contiguous array"); | |
601 | ||
602 | scm_array_get_handle (contents, &h); | |
603 | ||
604 | base = scm_array_handle_uniform_elements (&h); | |
605 | len = h.dims->inc * (h.dims->ubnd - h.dims->lbnd + 1); | |
606 | sz = scm_array_handle_uniform_element_size (&h); | |
607 | ||
608 | ret = make_bytevector (len * sz); | |
609 | memcpy (SCM_BYTEVECTOR_CONTENTS (ret), base, len * sz); | |
610 | ||
611 | scm_array_handle_release (&h); | |
612 | ||
613 | return ret; | |
614 | } | |
615 | #undef FUNC_NAME | |
616 | ||
1ee2c72e LC |
617 | \f |
618 | /* Operations on bytes and octets. */ | |
619 | ||
620 | SCM_DEFINE (scm_bytevector_u8_ref, "bytevector-u8-ref", 2, 0, 0, | |
621 | (SCM bv, SCM index), | |
622 | "Return the octet located at @var{index} in @var{bv}.") | |
623 | #define FUNC_NAME s_scm_bytevector_u8_ref | |
624 | { | |
625 | INTEGER_NATIVE_REF (8, unsigned); | |
626 | } | |
627 | #undef FUNC_NAME | |
628 | ||
629 | SCM_DEFINE (scm_bytevector_s8_ref, "bytevector-s8-ref", 2, 0, 0, | |
630 | (SCM bv, SCM index), | |
631 | "Return the byte located at @var{index} in @var{bv}.") | |
632 | #define FUNC_NAME s_scm_bytevector_s8_ref | |
633 | { | |
634 | INTEGER_NATIVE_REF (8, signed); | |
635 | } | |
636 | #undef FUNC_NAME | |
637 | ||
638 | SCM_DEFINE (scm_bytevector_u8_set_x, "bytevector-u8-set!", 3, 0, 0, | |
639 | (SCM bv, SCM index, SCM value), | |
640 | "Return the octet located at @var{index} in @var{bv}.") | |
641 | #define FUNC_NAME s_scm_bytevector_u8_set_x | |
642 | { | |
643 | INTEGER_NATIVE_SET (8, unsigned); | |
644 | } | |
645 | #undef FUNC_NAME | |
646 | ||
647 | SCM_DEFINE (scm_bytevector_s8_set_x, "bytevector-s8-set!", 3, 0, 0, | |
648 | (SCM bv, SCM index, SCM value), | |
649 | "Return the octet located at @var{index} in @var{bv}.") | |
cabf1b31 | 650 | #define FUNC_NAME s_scm_bytevector_s8_set_x |
1ee2c72e LC |
651 | { |
652 | INTEGER_NATIVE_SET (8, signed); | |
653 | } | |
654 | #undef FUNC_NAME | |
655 | ||
656 | #undef OCTET_ACCESSOR_PROLOGUE | |
657 | ||
658 | ||
659 | SCM_DEFINE (scm_bytevector_to_u8_list, "bytevector->u8-list", 1, 0, 0, | |
660 | (SCM bv), | |
661 | "Return a newly allocated list of octets containing the " | |
662 | "contents of @var{bv}.") | |
663 | #define FUNC_NAME s_scm_bytevector_to_u8_list | |
664 | { | |
665 | SCM lst, pair; | |
666 | unsigned c_len, i; | |
667 | unsigned char *c_bv; | |
668 | ||
669 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
670 | ||
671 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
672 | c_bv = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv); | |
673 | ||
674 | lst = scm_make_list (scm_from_uint (c_len), SCM_UNSPECIFIED); | |
675 | for (i = 0, pair = lst; | |
676 | i < c_len; | |
677 | i++, pair = SCM_CDR (pair)) | |
678 | { | |
679 | SCM_SETCAR (pair, SCM_I_MAKINUM (c_bv[i])); | |
680 | } | |
681 | ||
682 | return lst; | |
683 | } | |
684 | #undef FUNC_NAME | |
685 | ||
686 | SCM_DEFINE (scm_u8_list_to_bytevector, "u8-list->bytevector", 1, 0, 0, | |
687 | (SCM lst), | |
688 | "Turn @var{lst}, a list of octets, into a bytevector.") | |
689 | #define FUNC_NAME s_scm_u8_list_to_bytevector | |
690 | { | |
691 | SCM bv, item; | |
692 | long c_len, i; | |
693 | unsigned char *c_bv; | |
694 | ||
695 | SCM_VALIDATE_LIST_COPYLEN (1, lst, c_len); | |
696 | ||
697 | bv = make_bytevector (c_len); | |
698 | c_bv = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv); | |
699 | ||
700 | for (i = 0; i < c_len; lst = SCM_CDR (lst), i++) | |
701 | { | |
702 | item = SCM_CAR (lst); | |
703 | ||
704 | if (SCM_LIKELY (SCM_I_INUMP (item))) | |
705 | { | |
706 | long c_item; | |
707 | ||
708 | c_item = SCM_I_INUM (item); | |
709 | if (SCM_LIKELY ((c_item >= 0) && (c_item < 256))) | |
710 | c_bv[i] = (unsigned char) c_item; | |
711 | else | |
712 | goto type_error; | |
713 | } | |
714 | else | |
715 | goto type_error; | |
716 | } | |
717 | ||
718 | return bv; | |
719 | ||
720 | type_error: | |
721 | scm_wrong_type_arg (FUNC_NAME, 1, item); | |
722 | ||
723 | return SCM_BOOL_F; | |
724 | } | |
725 | #undef FUNC_NAME | |
726 | ||
727 | /* Compute the two's complement of VALUE (a positive integer) on SIZE octets | |
728 | using (2^(SIZE * 8) - VALUE). */ | |
729 | static inline void | |
730 | twos_complement (mpz_t value, size_t size) | |
731 | { | |
732 | unsigned long bit_count; | |
733 | ||
734 | /* We expect BIT_COUNT to fit in a unsigned long thanks to the range | |
735 | checking on SIZE performed earlier. */ | |
736 | bit_count = (unsigned long) size << 3UL; | |
737 | ||
738 | if (SCM_LIKELY (bit_count < sizeof (unsigned long))) | |
739 | mpz_ui_sub (value, 1UL << bit_count, value); | |
740 | else | |
741 | { | |
742 | mpz_t max; | |
743 | ||
744 | mpz_init (max); | |
745 | mpz_ui_pow_ui (max, 2, bit_count); | |
746 | mpz_sub (value, max, value); | |
747 | mpz_clear (max); | |
748 | } | |
749 | } | |
750 | ||
751 | static inline SCM | |
752 | bytevector_large_ref (const char *c_bv, size_t c_size, int signed_p, | |
753 | SCM endianness) | |
754 | { | |
755 | SCM result; | |
756 | mpz_t c_mpz; | |
757 | int c_endianness, negative_p = 0; | |
758 | ||
759 | if (signed_p) | |
760 | { | |
761 | if (scm_is_eq (endianness, scm_sym_big)) | |
762 | negative_p = c_bv[0] & 0x80; | |
763 | else | |
764 | negative_p = c_bv[c_size - 1] & 0x80; | |
765 | } | |
766 | ||
767 | c_endianness = scm_is_eq (endianness, scm_sym_big) ? 1 : -1; | |
768 | ||
769 | mpz_init (c_mpz); | |
770 | mpz_import (c_mpz, 1 /* 1 word */, 1 /* word order doesn't matter */, | |
771 | c_size /* word is C_SIZE-byte long */, | |
772 | c_endianness, | |
773 | 0 /* nails */, c_bv); | |
774 | ||
775 | if (signed_p && negative_p) | |
776 | { | |
777 | twos_complement (c_mpz, c_size); | |
778 | mpz_neg (c_mpz, c_mpz); | |
779 | } | |
780 | ||
781 | result = scm_from_mpz (c_mpz); | |
782 | mpz_clear (c_mpz); /* FIXME: Needed? */ | |
783 | ||
784 | return result; | |
785 | } | |
786 | ||
787 | static inline int | |
788 | bytevector_large_set (char *c_bv, size_t c_size, int signed_p, | |
789 | SCM value, SCM endianness) | |
790 | { | |
791 | mpz_t c_mpz; | |
792 | int c_endianness, c_sign, err = 0; | |
793 | ||
794 | c_endianness = scm_is_eq (endianness, scm_sym_big) ? 1 : -1; | |
795 | ||
796 | mpz_init (c_mpz); | |
797 | scm_to_mpz (value, c_mpz); | |
798 | ||
799 | c_sign = mpz_sgn (c_mpz); | |
800 | if (c_sign < 0) | |
801 | { | |
802 | if (SCM_LIKELY (signed_p)) | |
803 | { | |
804 | mpz_neg (c_mpz, c_mpz); | |
805 | twos_complement (c_mpz, c_size); | |
806 | } | |
807 | else | |
808 | { | |
809 | err = -1; | |
810 | goto finish; | |
811 | } | |
812 | } | |
813 | ||
814 | if (c_sign == 0) | |
815 | /* Zero. */ | |
816 | memset (c_bv, 0, c_size); | |
817 | else | |
818 | { | |
819 | size_t word_count, value_size; | |
820 | ||
821 | value_size = (mpz_sizeinbase (c_mpz, 2) + (8 * c_size)) / (8 * c_size); | |
822 | if (SCM_UNLIKELY (value_size > c_size)) | |
823 | { | |
824 | err = -2; | |
825 | goto finish; | |
826 | } | |
827 | ||
828 | ||
829 | mpz_export (c_bv, &word_count, 1 /* word order doesn't matter */, | |
830 | c_size, c_endianness, | |
831 | 0 /* nails */, c_mpz); | |
832 | if (SCM_UNLIKELY (word_count != 1)) | |
833 | /* Shouldn't happen since we already checked with VALUE_SIZE. */ | |
834 | abort (); | |
835 | } | |
836 | ||
837 | finish: | |
838 | mpz_clear (c_mpz); | |
839 | ||
840 | return err; | |
841 | } | |
842 | ||
843 | #define GENERIC_INTEGER_ACCESSOR_PROLOGUE(_sign) \ | |
844 | unsigned long c_len, c_index, c_size; \ | |
845 | char *c_bv; \ | |
846 | \ | |
847 | SCM_VALIDATE_BYTEVECTOR (1, bv); \ | |
848 | c_index = scm_to_ulong (index); \ | |
849 | c_size = scm_to_ulong (size); \ | |
850 | \ | |
851 | c_len = SCM_BYTEVECTOR_LENGTH (bv); \ | |
852 | c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
853 | \ | |
854 | /* C_SIZE must have its 3 higher bits set to zero so that \ | |
855 | multiplying it by 8 yields a number that fits in an \ | |
856 | unsigned long. */ \ | |
857 | if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \ | |
858 | scm_out_of_range (FUNC_NAME, size); \ | |
859 | if (SCM_UNLIKELY (c_index + c_size > c_len)) \ | |
860 | scm_out_of_range (FUNC_NAME, index); | |
861 | ||
862 | ||
863 | /* Template of an integer reference function. */ | |
864 | #define GENERIC_INTEGER_REF(_sign) \ | |
865 | SCM result; \ | |
866 | \ | |
867 | if (c_size < 3) \ | |
868 | { \ | |
869 | int swap; \ | |
870 | _sign int value; \ | |
871 | \ | |
caa92f5e | 872 | swap = !scm_is_eq (endianness, scm_i_native_endianness); \ |
1ee2c72e LC |
873 | switch (c_size) \ |
874 | { \ | |
875 | case 1: \ | |
876 | { \ | |
877 | _sign char c_value8; \ | |
878 | memcpy (&c_value8, c_bv, 1); \ | |
879 | value = c_value8; \ | |
880 | } \ | |
881 | break; \ | |
882 | case 2: \ | |
883 | { \ | |
884 | INT_TYPE (16, _sign) c_value16; \ | |
885 | memcpy (&c_value16, c_bv, 2); \ | |
886 | if (swap) \ | |
887 | value = (INT_TYPE (16, _sign)) bswap_16 (c_value16); \ | |
888 | else \ | |
889 | value = c_value16; \ | |
890 | } \ | |
891 | break; \ | |
892 | default: \ | |
893 | abort (); \ | |
894 | } \ | |
895 | \ | |
896 | result = SCM_I_MAKINUM ((_sign int) value); \ | |
897 | } \ | |
898 | else \ | |
899 | result = bytevector_large_ref ((char *) c_bv, \ | |
900 | c_size, SIGNEDNESS (_sign), \ | |
901 | endianness); \ | |
902 | \ | |
903 | return result; | |
904 | ||
905 | static inline SCM | |
906 | bytevector_signed_ref (const char *c_bv, size_t c_size, SCM endianness) | |
907 | { | |
908 | GENERIC_INTEGER_REF (signed); | |
909 | } | |
910 | ||
911 | static inline SCM | |
912 | bytevector_unsigned_ref (const char *c_bv, size_t c_size, SCM endianness) | |
913 | { | |
914 | GENERIC_INTEGER_REF (unsigned); | |
915 | } | |
916 | ||
917 | ||
918 | /* Template of an integer assignment function. */ | |
919 | #define GENERIC_INTEGER_SET(_sign) \ | |
920 | if (c_size < 3) \ | |
921 | { \ | |
922 | _sign int c_value; \ | |
923 | \ | |
924 | if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \ | |
925 | goto range_error; \ | |
926 | \ | |
927 | c_value = SCM_I_INUM (value); \ | |
928 | switch (c_size) \ | |
929 | { \ | |
930 | case 1: \ | |
931 | if (SCM_LIKELY (INT_VALID_P (8, _sign) (c_value))) \ | |
932 | { \ | |
933 | _sign char c_value8; \ | |
934 | c_value8 = (_sign char) c_value; \ | |
935 | memcpy (c_bv, &c_value8, 1); \ | |
936 | } \ | |
937 | else \ | |
938 | goto range_error; \ | |
939 | break; \ | |
940 | \ | |
941 | case 2: \ | |
942 | if (SCM_LIKELY (INT_VALID_P (16, _sign) (c_value))) \ | |
943 | { \ | |
944 | int swap; \ | |
945 | INT_TYPE (16, _sign) c_value16; \ | |
946 | \ | |
caa92f5e | 947 | swap = !scm_is_eq (endianness, scm_i_native_endianness); \ |
1ee2c72e LC |
948 | \ |
949 | if (swap) \ | |
950 | c_value16 = (INT_TYPE (16, _sign)) bswap_16 (c_value); \ | |
951 | else \ | |
952 | c_value16 = c_value; \ | |
953 | \ | |
954 | memcpy (c_bv, &c_value16, 2); \ | |
955 | } \ | |
956 | else \ | |
957 | goto range_error; \ | |
958 | break; \ | |
959 | \ | |
960 | default: \ | |
961 | abort (); \ | |
962 | } \ | |
963 | } \ | |
964 | else \ | |
965 | { \ | |
966 | int err; \ | |
967 | \ | |
968 | err = bytevector_large_set (c_bv, c_size, \ | |
969 | SIGNEDNESS (_sign), \ | |
970 | value, endianness); \ | |
971 | if (err) \ | |
972 | goto range_error; \ | |
973 | } \ | |
974 | \ | |
975 | return; \ | |
976 | \ | |
977 | range_error: \ | |
978 | scm_out_of_range (FUNC_NAME, value); \ | |
979 | return; | |
980 | ||
981 | static inline void | |
982 | bytevector_signed_set (char *c_bv, size_t c_size, | |
983 | SCM value, SCM endianness, | |
984 | const char *func_name) | |
985 | #define FUNC_NAME func_name | |
986 | { | |
987 | GENERIC_INTEGER_SET (signed); | |
988 | } | |
989 | #undef FUNC_NAME | |
990 | ||
991 | static inline void | |
992 | bytevector_unsigned_set (char *c_bv, size_t c_size, | |
993 | SCM value, SCM endianness, | |
994 | const char *func_name) | |
995 | #define FUNC_NAME func_name | |
996 | { | |
997 | GENERIC_INTEGER_SET (unsigned); | |
998 | } | |
999 | #undef FUNC_NAME | |
1000 | ||
1001 | #undef GENERIC_INTEGER_SET | |
1002 | #undef GENERIC_INTEGER_REF | |
1003 | ||
1004 | ||
1005 | SCM_DEFINE (scm_bytevector_uint_ref, "bytevector-uint-ref", 4, 0, 0, | |
1006 | (SCM bv, SCM index, SCM endianness, SCM size), | |
1007 | "Return the @var{size}-octet long unsigned integer at index " | |
1008 | "@var{index} in @var{bv}.") | |
1009 | #define FUNC_NAME s_scm_bytevector_uint_ref | |
1010 | { | |
1011 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned); | |
1012 | ||
1013 | return (bytevector_unsigned_ref (&c_bv[c_index], c_size, endianness)); | |
1014 | } | |
1015 | #undef FUNC_NAME | |
1016 | ||
1017 | SCM_DEFINE (scm_bytevector_sint_ref, "bytevector-sint-ref", 4, 0, 0, | |
1018 | (SCM bv, SCM index, SCM endianness, SCM size), | |
1019 | "Return the @var{size}-octet long unsigned integer at index " | |
1020 | "@var{index} in @var{bv}.") | |
1021 | #define FUNC_NAME s_scm_bytevector_sint_ref | |
1022 | { | |
1023 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed); | |
1024 | ||
1025 | return (bytevector_signed_ref (&c_bv[c_index], c_size, endianness)); | |
1026 | } | |
1027 | #undef FUNC_NAME | |
1028 | ||
1029 | SCM_DEFINE (scm_bytevector_uint_set_x, "bytevector-uint-set!", 5, 0, 0, | |
1030 | (SCM bv, SCM index, SCM value, SCM endianness, SCM size), | |
1031 | "Set the @var{size}-octet long unsigned integer at @var{index} " | |
1032 | "to @var{value}.") | |
1033 | #define FUNC_NAME s_scm_bytevector_uint_set_x | |
1034 | { | |
1035 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned); | |
1036 | ||
1037 | bytevector_unsigned_set (&c_bv[c_index], c_size, value, endianness, | |
1038 | FUNC_NAME); | |
1039 | ||
1040 | return SCM_UNSPECIFIED; | |
1041 | } | |
1042 | #undef FUNC_NAME | |
1043 | ||
1044 | SCM_DEFINE (scm_bytevector_sint_set_x, "bytevector-sint-set!", 5, 0, 0, | |
1045 | (SCM bv, SCM index, SCM value, SCM endianness, SCM size), | |
1046 | "Set the @var{size}-octet long signed integer at @var{index} " | |
1047 | "to @var{value}.") | |
1048 | #define FUNC_NAME s_scm_bytevector_sint_set_x | |
1049 | { | |
1050 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed); | |
1051 | ||
1052 | bytevector_signed_set (&c_bv[c_index], c_size, value, endianness, | |
1053 | FUNC_NAME); | |
1054 | ||
1055 | return SCM_UNSPECIFIED; | |
1056 | } | |
1057 | #undef FUNC_NAME | |
1058 | ||
1059 | ||
1060 | \f | |
1061 | /* Operations on integers of arbitrary size. */ | |
1062 | ||
1063 | #define INTEGERS_TO_LIST(_sign) \ | |
1064 | SCM lst, pair; \ | |
1065 | size_t i, c_len, c_size; \ | |
1066 | \ | |
1067 | SCM_VALIDATE_BYTEVECTOR (1, bv); \ | |
1068 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1069 | c_size = scm_to_uint (size); \ | |
1070 | \ | |
1071 | c_len = SCM_BYTEVECTOR_LENGTH (bv); \ | |
1072 | if (SCM_UNLIKELY (c_len == 0)) \ | |
1073 | lst = SCM_EOL; \ | |
1074 | else if (SCM_UNLIKELY (c_len < c_size)) \ | |
1075 | scm_out_of_range (FUNC_NAME, size); \ | |
1076 | else \ | |
1077 | { \ | |
1078 | const char *c_bv; \ | |
1079 | \ | |
1080 | c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
1081 | \ | |
1082 | lst = scm_make_list (scm_from_uint (c_len / c_size), \ | |
1083 | SCM_UNSPECIFIED); \ | |
1084 | for (i = 0, pair = lst; \ | |
1085 | i <= c_len - c_size; \ | |
1086 | i += c_size, c_bv += c_size, pair = SCM_CDR (pair)) \ | |
1087 | { \ | |
1088 | SCM_SETCAR (pair, \ | |
1089 | bytevector_ ## _sign ## _ref (c_bv, c_size, \ | |
1090 | endianness)); \ | |
1091 | } \ | |
1092 | } \ | |
1093 | \ | |
1094 | return lst; | |
1095 | ||
1096 | SCM_DEFINE (scm_bytevector_to_sint_list, "bytevector->sint-list", | |
1097 | 3, 0, 0, | |
1098 | (SCM bv, SCM endianness, SCM size), | |
1099 | "Return a list of signed integers of @var{size} octets " | |
1100 | "representing the contents of @var{bv}.") | |
1101 | #define FUNC_NAME s_scm_bytevector_to_sint_list | |
1102 | { | |
1103 | INTEGERS_TO_LIST (signed); | |
1104 | } | |
1105 | #undef FUNC_NAME | |
1106 | ||
1107 | SCM_DEFINE (scm_bytevector_to_uint_list, "bytevector->uint-list", | |
1108 | 3, 0, 0, | |
1109 | (SCM bv, SCM endianness, SCM size), | |
1110 | "Return a list of unsigned integers of @var{size} octets " | |
1111 | "representing the contents of @var{bv}.") | |
1112 | #define FUNC_NAME s_scm_bytevector_to_uint_list | |
1113 | { | |
1114 | INTEGERS_TO_LIST (unsigned); | |
1115 | } | |
1116 | #undef FUNC_NAME | |
1117 | ||
1118 | #undef INTEGER_TO_LIST | |
1119 | ||
1120 | ||
1121 | #define INTEGER_LIST_TO_BYTEVECTOR(_sign) \ | |
1122 | SCM bv; \ | |
1123 | long c_len; \ | |
1124 | size_t c_size; \ | |
1125 | char *c_bv, *c_bv_ptr; \ | |
1126 | \ | |
1127 | SCM_VALIDATE_LIST_COPYLEN (1, lst, c_len); \ | |
1128 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1129 | c_size = scm_to_uint (size); \ | |
1130 | \ | |
1131 | if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \ | |
1132 | scm_out_of_range (FUNC_NAME, size); \ | |
1133 | \ | |
1134 | bv = make_bytevector (c_len * c_size); \ | |
1135 | c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
1136 | \ | |
1137 | for (c_bv_ptr = c_bv; \ | |
1138 | !scm_is_null (lst); \ | |
1139 | lst = SCM_CDR (lst), c_bv_ptr += c_size) \ | |
1140 | { \ | |
1141 | bytevector_ ## _sign ## _set (c_bv_ptr, c_size, \ | |
1142 | SCM_CAR (lst), endianness, \ | |
1143 | FUNC_NAME); \ | |
1144 | } \ | |
1145 | \ | |
1146 | return bv; | |
1147 | ||
1148 | ||
1149 | SCM_DEFINE (scm_uint_list_to_bytevector, "uint-list->bytevector", | |
1150 | 3, 0, 0, | |
1151 | (SCM lst, SCM endianness, SCM size), | |
1152 | "Return a bytevector containing the unsigned integers " | |
1153 | "listed in @var{lst} and encoded on @var{size} octets " | |
1154 | "according to @var{endianness}.") | |
1155 | #define FUNC_NAME s_scm_uint_list_to_bytevector | |
1156 | { | |
1157 | INTEGER_LIST_TO_BYTEVECTOR (unsigned); | |
1158 | } | |
1159 | #undef FUNC_NAME | |
1160 | ||
1161 | SCM_DEFINE (scm_sint_list_to_bytevector, "sint-list->bytevector", | |
1162 | 3, 0, 0, | |
1163 | (SCM lst, SCM endianness, SCM size), | |
1164 | "Return a bytevector containing the signed integers " | |
1165 | "listed in @var{lst} and encoded on @var{size} octets " | |
1166 | "according to @var{endianness}.") | |
1167 | #define FUNC_NAME s_scm_sint_list_to_bytevector | |
1168 | { | |
1169 | INTEGER_LIST_TO_BYTEVECTOR (signed); | |
1170 | } | |
1171 | #undef FUNC_NAME | |
1172 | ||
1173 | #undef INTEGER_LIST_TO_BYTEVECTOR | |
1174 | ||
1175 | ||
1176 | \f | |
1177 | /* Operations on 16-bit integers. */ | |
1178 | ||
1179 | SCM_DEFINE (scm_bytevector_u16_ref, "bytevector-u16-ref", | |
1180 | 3, 0, 0, | |
1181 | (SCM bv, SCM index, SCM endianness), | |
1182 | "Return the unsigned 16-bit integer from @var{bv} at " | |
1183 | "@var{index}.") | |
1184 | #define FUNC_NAME s_scm_bytevector_u16_ref | |
1185 | { | |
1186 | INTEGER_REF (16, unsigned); | |
1187 | } | |
1188 | #undef FUNC_NAME | |
1189 | ||
1190 | SCM_DEFINE (scm_bytevector_s16_ref, "bytevector-s16-ref", | |
1191 | 3, 0, 0, | |
1192 | (SCM bv, SCM index, SCM endianness), | |
1193 | "Return the signed 16-bit integer from @var{bv} at " | |
1194 | "@var{index}.") | |
1195 | #define FUNC_NAME s_scm_bytevector_s16_ref | |
1196 | { | |
1197 | INTEGER_REF (16, signed); | |
1198 | } | |
1199 | #undef FUNC_NAME | |
1200 | ||
1201 | SCM_DEFINE (scm_bytevector_u16_native_ref, "bytevector-u16-native-ref", | |
1202 | 2, 0, 0, | |
1203 | (SCM bv, SCM index), | |
1204 | "Return the unsigned 16-bit integer from @var{bv} at " | |
1205 | "@var{index} using the native endianness.") | |
1206 | #define FUNC_NAME s_scm_bytevector_u16_native_ref | |
1207 | { | |
1208 | INTEGER_NATIVE_REF (16, unsigned); | |
1209 | } | |
1210 | #undef FUNC_NAME | |
1211 | ||
1212 | SCM_DEFINE (scm_bytevector_s16_native_ref, "bytevector-s16-native-ref", | |
1213 | 2, 0, 0, | |
1214 | (SCM bv, SCM index), | |
1215 | "Return the unsigned 16-bit integer from @var{bv} at " | |
1216 | "@var{index} using the native endianness.") | |
1217 | #define FUNC_NAME s_scm_bytevector_s16_native_ref | |
1218 | { | |
1219 | INTEGER_NATIVE_REF (16, signed); | |
1220 | } | |
1221 | #undef FUNC_NAME | |
1222 | ||
1223 | SCM_DEFINE (scm_bytevector_u16_set_x, "bytevector-u16-set!", | |
1224 | 4, 0, 0, | |
1225 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1226 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1227 | "@var{endianness}.") | |
1228 | #define FUNC_NAME s_scm_bytevector_u16_set_x | |
1229 | { | |
1230 | INTEGER_SET (16, unsigned); | |
1231 | } | |
1232 | #undef FUNC_NAME | |
1233 | ||
1234 | SCM_DEFINE (scm_bytevector_s16_set_x, "bytevector-s16-set!", | |
1235 | 4, 0, 0, | |
1236 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1237 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1238 | "@var{endianness}.") | |
1239 | #define FUNC_NAME s_scm_bytevector_s16_set_x | |
1240 | { | |
1241 | INTEGER_SET (16, signed); | |
1242 | } | |
1243 | #undef FUNC_NAME | |
1244 | ||
1245 | SCM_DEFINE (scm_bytevector_u16_native_set_x, "bytevector-u16-native-set!", | |
1246 | 3, 0, 0, | |
1247 | (SCM bv, SCM index, SCM value), | |
1248 | "Store the unsigned integer @var{value} at index @var{index} " | |
1249 | "of @var{bv} using the native endianness.") | |
1250 | #define FUNC_NAME s_scm_bytevector_u16_native_set_x | |
1251 | { | |
1252 | INTEGER_NATIVE_SET (16, unsigned); | |
1253 | } | |
1254 | #undef FUNC_NAME | |
1255 | ||
1256 | SCM_DEFINE (scm_bytevector_s16_native_set_x, "bytevector-s16-native-set!", | |
1257 | 3, 0, 0, | |
1258 | (SCM bv, SCM index, SCM value), | |
1259 | "Store the signed integer @var{value} at index @var{index} " | |
1260 | "of @var{bv} using the native endianness.") | |
1261 | #define FUNC_NAME s_scm_bytevector_s16_native_set_x | |
1262 | { | |
1263 | INTEGER_NATIVE_SET (16, signed); | |
1264 | } | |
1265 | #undef FUNC_NAME | |
1266 | ||
1267 | ||
1268 | \f | |
1269 | /* Operations on 32-bit integers. */ | |
1270 | ||
1271 | /* Unfortunately, on 32-bit machines `SCM' is not large enough to hold | |
1272 | arbitrary 32-bit integers. Thus we fall back to using the | |
1273 | `large_{ref,set}' variants on 32-bit machines. */ | |
1274 | ||
1275 | #define LARGE_INTEGER_REF(_len, _sign) \ | |
1276 | INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \ | |
1277 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
1278 | \ | |
1279 | return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \ | |
1280 | SIGNEDNESS (_sign), endianness)); | |
1281 | ||
1282 | #define LARGE_INTEGER_SET(_len, _sign) \ | |
1283 | int err; \ | |
1284 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
1285 | SCM_VALIDATE_SYMBOL (4, endianness); \ | |
1286 | \ | |
1287 | err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \ | |
1288 | SIGNEDNESS (_sign), value, endianness); \ | |
1289 | if (SCM_UNLIKELY (err)) \ | |
1290 | scm_out_of_range (FUNC_NAME, value); \ | |
1291 | \ | |
1292 | return SCM_UNSPECIFIED; | |
1293 | ||
1294 | #define LARGE_INTEGER_NATIVE_REF(_len, _sign) \ | |
1295 | INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \ | |
1296 | return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \ | |
caa92f5e | 1297 | SIGNEDNESS (_sign), scm_i_native_endianness)); |
1ee2c72e LC |
1298 | |
1299 | #define LARGE_INTEGER_NATIVE_SET(_len, _sign) \ | |
1300 | int err; \ | |
1301 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
1302 | \ | |
1303 | err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \ | |
1304 | SIGNEDNESS (_sign), value, \ | |
caa92f5e | 1305 | scm_i_native_endianness); \ |
1ee2c72e LC |
1306 | if (SCM_UNLIKELY (err)) \ |
1307 | scm_out_of_range (FUNC_NAME, value); \ | |
1308 | \ | |
1309 | return SCM_UNSPECIFIED; | |
1310 | ||
1311 | ||
1312 | SCM_DEFINE (scm_bytevector_u32_ref, "bytevector-u32-ref", | |
1313 | 3, 0, 0, | |
1314 | (SCM bv, SCM index, SCM endianness), | |
1315 | "Return the unsigned 32-bit integer from @var{bv} at " | |
1316 | "@var{index}.") | |
1317 | #define FUNC_NAME s_scm_bytevector_u32_ref | |
1318 | { | |
1319 | #if SIZEOF_VOID_P > 4 | |
1320 | INTEGER_REF (32, unsigned); | |
1321 | #else | |
1322 | LARGE_INTEGER_REF (32, unsigned); | |
1323 | #endif | |
1324 | } | |
1325 | #undef FUNC_NAME | |
1326 | ||
1327 | SCM_DEFINE (scm_bytevector_s32_ref, "bytevector-s32-ref", | |
1328 | 3, 0, 0, | |
1329 | (SCM bv, SCM index, SCM endianness), | |
1330 | "Return the signed 32-bit integer from @var{bv} at " | |
1331 | "@var{index}.") | |
1332 | #define FUNC_NAME s_scm_bytevector_s32_ref | |
1333 | { | |
1334 | #if SIZEOF_VOID_P > 4 | |
1335 | INTEGER_REF (32, signed); | |
1336 | #else | |
1337 | LARGE_INTEGER_REF (32, signed); | |
1338 | #endif | |
1339 | } | |
1340 | #undef FUNC_NAME | |
1341 | ||
1342 | SCM_DEFINE (scm_bytevector_u32_native_ref, "bytevector-u32-native-ref", | |
1343 | 2, 0, 0, | |
1344 | (SCM bv, SCM index), | |
1345 | "Return the unsigned 32-bit integer from @var{bv} at " | |
1346 | "@var{index} using the native endianness.") | |
1347 | #define FUNC_NAME s_scm_bytevector_u32_native_ref | |
1348 | { | |
1349 | #if SIZEOF_VOID_P > 4 | |
1350 | INTEGER_NATIVE_REF (32, unsigned); | |
1351 | #else | |
1352 | LARGE_INTEGER_NATIVE_REF (32, unsigned); | |
1353 | #endif | |
1354 | } | |
1355 | #undef FUNC_NAME | |
1356 | ||
1357 | SCM_DEFINE (scm_bytevector_s32_native_ref, "bytevector-s32-native-ref", | |
1358 | 2, 0, 0, | |
1359 | (SCM bv, SCM index), | |
1360 | "Return the unsigned 32-bit integer from @var{bv} at " | |
1361 | "@var{index} using the native endianness.") | |
1362 | #define FUNC_NAME s_scm_bytevector_s32_native_ref | |
1363 | { | |
1364 | #if SIZEOF_VOID_P > 4 | |
1365 | INTEGER_NATIVE_REF (32, signed); | |
1366 | #else | |
1367 | LARGE_INTEGER_NATIVE_REF (32, signed); | |
1368 | #endif | |
1369 | } | |
1370 | #undef FUNC_NAME | |
1371 | ||
1372 | SCM_DEFINE (scm_bytevector_u32_set_x, "bytevector-u32-set!", | |
1373 | 4, 0, 0, | |
1374 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1375 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1376 | "@var{endianness}.") | |
1377 | #define FUNC_NAME s_scm_bytevector_u32_set_x | |
1378 | { | |
1379 | #if SIZEOF_VOID_P > 4 | |
1380 | INTEGER_SET (32, unsigned); | |
1381 | #else | |
1382 | LARGE_INTEGER_SET (32, unsigned); | |
1383 | #endif | |
1384 | } | |
1385 | #undef FUNC_NAME | |
1386 | ||
1387 | SCM_DEFINE (scm_bytevector_s32_set_x, "bytevector-s32-set!", | |
1388 | 4, 0, 0, | |
1389 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1390 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1391 | "@var{endianness}.") | |
1392 | #define FUNC_NAME s_scm_bytevector_s32_set_x | |
1393 | { | |
1394 | #if SIZEOF_VOID_P > 4 | |
1395 | INTEGER_SET (32, signed); | |
1396 | #else | |
1397 | LARGE_INTEGER_SET (32, signed); | |
1398 | #endif | |
1399 | } | |
1400 | #undef FUNC_NAME | |
1401 | ||
1402 | SCM_DEFINE (scm_bytevector_u32_native_set_x, "bytevector-u32-native-set!", | |
1403 | 3, 0, 0, | |
1404 | (SCM bv, SCM index, SCM value), | |
1405 | "Store the unsigned integer @var{value} at index @var{index} " | |
1406 | "of @var{bv} using the native endianness.") | |
1407 | #define FUNC_NAME s_scm_bytevector_u32_native_set_x | |
1408 | { | |
1409 | #if SIZEOF_VOID_P > 4 | |
1410 | INTEGER_NATIVE_SET (32, unsigned); | |
1411 | #else | |
1412 | LARGE_INTEGER_NATIVE_SET (32, unsigned); | |
1413 | #endif | |
1414 | } | |
1415 | #undef FUNC_NAME | |
1416 | ||
1417 | SCM_DEFINE (scm_bytevector_s32_native_set_x, "bytevector-s32-native-set!", | |
1418 | 3, 0, 0, | |
1419 | (SCM bv, SCM index, SCM value), | |
1420 | "Store the signed integer @var{value} at index @var{index} " | |
1421 | "of @var{bv} using the native endianness.") | |
1422 | #define FUNC_NAME s_scm_bytevector_s32_native_set_x | |
1423 | { | |
1424 | #if SIZEOF_VOID_P > 4 | |
1425 | INTEGER_NATIVE_SET (32, signed); | |
1426 | #else | |
1427 | LARGE_INTEGER_NATIVE_SET (32, signed); | |
1428 | #endif | |
1429 | } | |
1430 | #undef FUNC_NAME | |
1431 | ||
1432 | ||
1433 | \f | |
1434 | /* Operations on 64-bit integers. */ | |
1435 | ||
1436 | /* For 64-bit integers, we use only the `large_{ref,set}' variant. */ | |
1437 | ||
1438 | SCM_DEFINE (scm_bytevector_u64_ref, "bytevector-u64-ref", | |
1439 | 3, 0, 0, | |
1440 | (SCM bv, SCM index, SCM endianness), | |
1441 | "Return the unsigned 64-bit integer from @var{bv} at " | |
1442 | "@var{index}.") | |
1443 | #define FUNC_NAME s_scm_bytevector_u64_ref | |
1444 | { | |
1445 | LARGE_INTEGER_REF (64, unsigned); | |
1446 | } | |
1447 | #undef FUNC_NAME | |
1448 | ||
1449 | SCM_DEFINE (scm_bytevector_s64_ref, "bytevector-s64-ref", | |
1450 | 3, 0, 0, | |
1451 | (SCM bv, SCM index, SCM endianness), | |
1452 | "Return the signed 64-bit integer from @var{bv} at " | |
1453 | "@var{index}.") | |
1454 | #define FUNC_NAME s_scm_bytevector_s64_ref | |
1455 | { | |
1456 | LARGE_INTEGER_REF (64, signed); | |
1457 | } | |
1458 | #undef FUNC_NAME | |
1459 | ||
1460 | SCM_DEFINE (scm_bytevector_u64_native_ref, "bytevector-u64-native-ref", | |
1461 | 2, 0, 0, | |
1462 | (SCM bv, SCM index), | |
1463 | "Return the unsigned 64-bit integer from @var{bv} at " | |
1464 | "@var{index} using the native endianness.") | |
1465 | #define FUNC_NAME s_scm_bytevector_u64_native_ref | |
1466 | { | |
1467 | LARGE_INTEGER_NATIVE_REF (64, unsigned); | |
1468 | } | |
1469 | #undef FUNC_NAME | |
1470 | ||
1471 | SCM_DEFINE (scm_bytevector_s64_native_ref, "bytevector-s64-native-ref", | |
1472 | 2, 0, 0, | |
1473 | (SCM bv, SCM index), | |
1474 | "Return the unsigned 64-bit integer from @var{bv} at " | |
1475 | "@var{index} using the native endianness.") | |
1476 | #define FUNC_NAME s_scm_bytevector_s64_native_ref | |
1477 | { | |
1478 | LARGE_INTEGER_NATIVE_REF (64, signed); | |
1479 | } | |
1480 | #undef FUNC_NAME | |
1481 | ||
1482 | SCM_DEFINE (scm_bytevector_u64_set_x, "bytevector-u64-set!", | |
1483 | 4, 0, 0, | |
1484 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1485 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1486 | "@var{endianness}.") | |
1487 | #define FUNC_NAME s_scm_bytevector_u64_set_x | |
1488 | { | |
1489 | LARGE_INTEGER_SET (64, unsigned); | |
1490 | } | |
1491 | #undef FUNC_NAME | |
1492 | ||
1493 | SCM_DEFINE (scm_bytevector_s64_set_x, "bytevector-s64-set!", | |
1494 | 4, 0, 0, | |
1495 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1496 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1497 | "@var{endianness}.") | |
1498 | #define FUNC_NAME s_scm_bytevector_s64_set_x | |
1499 | { | |
1500 | LARGE_INTEGER_SET (64, signed); | |
1501 | } | |
1502 | #undef FUNC_NAME | |
1503 | ||
1504 | SCM_DEFINE (scm_bytevector_u64_native_set_x, "bytevector-u64-native-set!", | |
1505 | 3, 0, 0, | |
1506 | (SCM bv, SCM index, SCM value), | |
1507 | "Store the unsigned integer @var{value} at index @var{index} " | |
1508 | "of @var{bv} using the native endianness.") | |
1509 | #define FUNC_NAME s_scm_bytevector_u64_native_set_x | |
1510 | { | |
1511 | LARGE_INTEGER_NATIVE_SET (64, unsigned); | |
1512 | } | |
1513 | #undef FUNC_NAME | |
1514 | ||
1515 | SCM_DEFINE (scm_bytevector_s64_native_set_x, "bytevector-s64-native-set!", | |
1516 | 3, 0, 0, | |
1517 | (SCM bv, SCM index, SCM value), | |
1518 | "Store the signed integer @var{value} at index @var{index} " | |
1519 | "of @var{bv} using the native endianness.") | |
1520 | #define FUNC_NAME s_scm_bytevector_s64_native_set_x | |
1521 | { | |
1522 | LARGE_INTEGER_NATIVE_SET (64, signed); | |
1523 | } | |
1524 | #undef FUNC_NAME | |
1525 | ||
1526 | ||
1527 | \f | |
1528 | /* Operations on IEEE-754 numbers. */ | |
1529 | ||
1530 | /* There are two possible word endians, visible in glibc's <ieee754.h>. | |
1531 | However, in R6RS, when the endianness is `little', little endian is | |
1532 | assumed for both the byte order and the word order. This is clear from | |
1533 | Section 2.1 of R6RS-lib (in response to | |
1534 | http://www.r6rs.org/formal-comments/comment-187.txt). */ | |
1535 | ||
1536 | ||
1537 | /* Convert to/from a floating-point number with different endianness. This | |
1538 | method is probably not the most efficient but it should be portable. */ | |
1539 | ||
1540 | static inline void | |
1541 | float_to_foreign_endianness (union scm_ieee754_float *target, | |
1542 | float source) | |
1543 | { | |
1544 | union scm_ieee754_float src; | |
1545 | ||
1546 | src.f = source; | |
1547 | ||
1548 | #ifdef WORDS_BIGENDIAN | |
1549 | /* Assuming little endian for both byte and word order. */ | |
1550 | target->little_endian.negative = src.big_endian.negative; | |
1551 | target->little_endian.exponent = src.big_endian.exponent; | |
1552 | target->little_endian.mantissa = src.big_endian.mantissa; | |
1553 | #else | |
1554 | target->big_endian.negative = src.little_endian.negative; | |
1555 | target->big_endian.exponent = src.little_endian.exponent; | |
1556 | target->big_endian.mantissa = src.little_endian.mantissa; | |
1557 | #endif | |
1558 | } | |
1559 | ||
1560 | static inline float | |
1561 | float_from_foreign_endianness (const union scm_ieee754_float *source) | |
1562 | { | |
1563 | union scm_ieee754_float result; | |
1564 | ||
1565 | #ifdef WORDS_BIGENDIAN | |
1566 | /* Assuming little endian for both byte and word order. */ | |
1567 | result.big_endian.negative = source->little_endian.negative; | |
1568 | result.big_endian.exponent = source->little_endian.exponent; | |
1569 | result.big_endian.mantissa = source->little_endian.mantissa; | |
1570 | #else | |
1571 | result.little_endian.negative = source->big_endian.negative; | |
1572 | result.little_endian.exponent = source->big_endian.exponent; | |
1573 | result.little_endian.mantissa = source->big_endian.mantissa; | |
1574 | #endif | |
1575 | ||
1576 | return (result.f); | |
1577 | } | |
1578 | ||
1579 | static inline void | |
1580 | double_to_foreign_endianness (union scm_ieee754_double *target, | |
1581 | double source) | |
1582 | { | |
1583 | union scm_ieee754_double src; | |
1584 | ||
1585 | src.d = source; | |
1586 | ||
1587 | #ifdef WORDS_BIGENDIAN | |
1588 | /* Assuming little endian for both byte and word order. */ | |
1589 | target->little_little_endian.negative = src.big_endian.negative; | |
1590 | target->little_little_endian.exponent = src.big_endian.exponent; | |
1591 | target->little_little_endian.mantissa0 = src.big_endian.mantissa0; | |
1592 | target->little_little_endian.mantissa1 = src.big_endian.mantissa1; | |
1593 | #else | |
1594 | target->big_endian.negative = src.little_little_endian.negative; | |
1595 | target->big_endian.exponent = src.little_little_endian.exponent; | |
1596 | target->big_endian.mantissa0 = src.little_little_endian.mantissa0; | |
1597 | target->big_endian.mantissa1 = src.little_little_endian.mantissa1; | |
1598 | #endif | |
1599 | } | |
1600 | ||
1601 | static inline double | |
1602 | double_from_foreign_endianness (const union scm_ieee754_double *source) | |
1603 | { | |
1604 | union scm_ieee754_double result; | |
1605 | ||
1606 | #ifdef WORDS_BIGENDIAN | |
1607 | /* Assuming little endian for both byte and word order. */ | |
1608 | result.big_endian.negative = source->little_little_endian.negative; | |
1609 | result.big_endian.exponent = source->little_little_endian.exponent; | |
1610 | result.big_endian.mantissa0 = source->little_little_endian.mantissa0; | |
1611 | result.big_endian.mantissa1 = source->little_little_endian.mantissa1; | |
1612 | #else | |
1613 | result.little_little_endian.negative = source->big_endian.negative; | |
1614 | result.little_little_endian.exponent = source->big_endian.exponent; | |
1615 | result.little_little_endian.mantissa0 = source->big_endian.mantissa0; | |
1616 | result.little_little_endian.mantissa1 = source->big_endian.mantissa1; | |
1617 | #endif | |
1618 | ||
1619 | return (result.d); | |
1620 | } | |
1621 | ||
1622 | /* Template macros to abstract over doubles and floats. | |
1623 | XXX: Guile can only convert to/from doubles. */ | |
1624 | #define IEEE754_UNION(_c_type) union scm_ieee754_ ## _c_type | |
1625 | #define IEEE754_TO_SCM(_c_type) scm_from_double | |
1626 | #define IEEE754_FROM_SCM(_c_type) scm_to_double | |
1627 | #define IEEE754_FROM_FOREIGN_ENDIANNESS(_c_type) \ | |
1628 | _c_type ## _from_foreign_endianness | |
1629 | #define IEEE754_TO_FOREIGN_ENDIANNESS(_c_type) \ | |
1630 | _c_type ## _to_foreign_endianness | |
1631 | ||
1632 | ||
1633 | /* Templace getters and setters. */ | |
1634 | ||
1635 | #define IEEE754_ACCESSOR_PROLOGUE(_type) \ | |
1636 | INTEGER_ACCESSOR_PROLOGUE (sizeof (_type) << 3UL, signed); | |
1637 | ||
1638 | #define IEEE754_REF(_type) \ | |
1639 | _type c_result; \ | |
1640 | \ | |
1641 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
1642 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
1643 | \ | |
caa92f5e | 1644 | if (scm_is_eq (endianness, scm_i_native_endianness)) \ |
1ee2c72e LC |
1645 | memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \ |
1646 | else \ | |
1647 | { \ | |
1648 | IEEE754_UNION (_type) c_raw; \ | |
1649 | \ | |
1650 | memcpy (&c_raw, &c_bv[c_index], sizeof (c_raw)); \ | |
1651 | c_result = \ | |
1652 | IEEE754_FROM_FOREIGN_ENDIANNESS (_type) (&c_raw); \ | |
1653 | } \ | |
1654 | \ | |
1655 | return (IEEE754_TO_SCM (_type) (c_result)); | |
1656 | ||
1657 | #define IEEE754_NATIVE_REF(_type) \ | |
1658 | _type c_result; \ | |
1659 | \ | |
1660 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
1661 | \ | |
1662 | memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \ | |
1663 | return (IEEE754_TO_SCM (_type) (c_result)); | |
1664 | ||
1665 | #define IEEE754_SET(_type) \ | |
1666 | _type c_value; \ | |
1667 | \ | |
1668 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
1669 | SCM_VALIDATE_REAL (3, value); \ | |
1670 | SCM_VALIDATE_SYMBOL (4, endianness); \ | |
1671 | c_value = IEEE754_FROM_SCM (_type) (value); \ | |
1672 | \ | |
caa92f5e | 1673 | if (scm_is_eq (endianness, scm_i_native_endianness)) \ |
1ee2c72e LC |
1674 | memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \ |
1675 | else \ | |
1676 | { \ | |
1677 | IEEE754_UNION (_type) c_raw; \ | |
1678 | \ | |
1679 | IEEE754_TO_FOREIGN_ENDIANNESS (_type) (&c_raw, c_value); \ | |
1680 | memcpy (&c_bv[c_index], &c_raw, sizeof (c_raw)); \ | |
1681 | } \ | |
1682 | \ | |
1683 | return SCM_UNSPECIFIED; | |
1684 | ||
1685 | #define IEEE754_NATIVE_SET(_type) \ | |
1686 | _type c_value; \ | |
1687 | \ | |
1688 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
1689 | SCM_VALIDATE_REAL (3, value); \ | |
1690 | c_value = IEEE754_FROM_SCM (_type) (value); \ | |
1691 | \ | |
1692 | memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \ | |
1693 | return SCM_UNSPECIFIED; | |
1694 | ||
1695 | ||
1696 | /* Single precision. */ | |
1697 | ||
1698 | SCM_DEFINE (scm_bytevector_ieee_single_ref, | |
1699 | "bytevector-ieee-single-ref", | |
1700 | 3, 0, 0, | |
1701 | (SCM bv, SCM index, SCM endianness), | |
1702 | "Return the IEEE-754 single from @var{bv} at " | |
1703 | "@var{index}.") | |
1704 | #define FUNC_NAME s_scm_bytevector_ieee_single_ref | |
1705 | { | |
1706 | IEEE754_REF (float); | |
1707 | } | |
1708 | #undef FUNC_NAME | |
1709 | ||
1710 | SCM_DEFINE (scm_bytevector_ieee_single_native_ref, | |
1711 | "bytevector-ieee-single-native-ref", | |
1712 | 2, 0, 0, | |
1713 | (SCM bv, SCM index), | |
1714 | "Return the IEEE-754 single from @var{bv} at " | |
1715 | "@var{index} using the native endianness.") | |
1716 | #define FUNC_NAME s_scm_bytevector_ieee_single_native_ref | |
1717 | { | |
1718 | IEEE754_NATIVE_REF (float); | |
1719 | } | |
1720 | #undef FUNC_NAME | |
1721 | ||
1722 | SCM_DEFINE (scm_bytevector_ieee_single_set_x, | |
1723 | "bytevector-ieee-single-set!", | |
1724 | 4, 0, 0, | |
1725 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1726 | "Store real @var{value} in @var{bv} at @var{index} according to " | |
1727 | "@var{endianness}.") | |
1728 | #define FUNC_NAME s_scm_bytevector_ieee_single_set_x | |
1729 | { | |
1730 | IEEE754_SET (float); | |
1731 | } | |
1732 | #undef FUNC_NAME | |
1733 | ||
1734 | SCM_DEFINE (scm_bytevector_ieee_single_native_set_x, | |
1735 | "bytevector-ieee-single-native-set!", | |
1736 | 3, 0, 0, | |
1737 | (SCM bv, SCM index, SCM value), | |
1738 | "Store the real @var{value} at index @var{index} " | |
1739 | "of @var{bv} using the native endianness.") | |
1740 | #define FUNC_NAME s_scm_bytevector_ieee_single_native_set_x | |
1741 | { | |
1742 | IEEE754_NATIVE_SET (float); | |
1743 | } | |
1744 | #undef FUNC_NAME | |
1745 | ||
1746 | ||
1747 | /* Double precision. */ | |
1748 | ||
1749 | SCM_DEFINE (scm_bytevector_ieee_double_ref, | |
1750 | "bytevector-ieee-double-ref", | |
1751 | 3, 0, 0, | |
1752 | (SCM bv, SCM index, SCM endianness), | |
1753 | "Return the IEEE-754 double from @var{bv} at " | |
1754 | "@var{index}.") | |
1755 | #define FUNC_NAME s_scm_bytevector_ieee_double_ref | |
1756 | { | |
1757 | IEEE754_REF (double); | |
1758 | } | |
1759 | #undef FUNC_NAME | |
1760 | ||
1761 | SCM_DEFINE (scm_bytevector_ieee_double_native_ref, | |
1762 | "bytevector-ieee-double-native-ref", | |
1763 | 2, 0, 0, | |
1764 | (SCM bv, SCM index), | |
1765 | "Return the IEEE-754 double from @var{bv} at " | |
1766 | "@var{index} using the native endianness.") | |
1767 | #define FUNC_NAME s_scm_bytevector_ieee_double_native_ref | |
1768 | { | |
1769 | IEEE754_NATIVE_REF (double); | |
1770 | } | |
1771 | #undef FUNC_NAME | |
1772 | ||
1773 | SCM_DEFINE (scm_bytevector_ieee_double_set_x, | |
1774 | "bytevector-ieee-double-set!", | |
1775 | 4, 0, 0, | |
1776 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1777 | "Store real @var{value} in @var{bv} at @var{index} according to " | |
1778 | "@var{endianness}.") | |
1779 | #define FUNC_NAME s_scm_bytevector_ieee_double_set_x | |
1780 | { | |
1781 | IEEE754_SET (double); | |
1782 | } | |
1783 | #undef FUNC_NAME | |
1784 | ||
1785 | SCM_DEFINE (scm_bytevector_ieee_double_native_set_x, | |
1786 | "bytevector-ieee-double-native-set!", | |
1787 | 3, 0, 0, | |
1788 | (SCM bv, SCM index, SCM value), | |
1789 | "Store the real @var{value} at index @var{index} " | |
1790 | "of @var{bv} using the native endianness.") | |
1791 | #define FUNC_NAME s_scm_bytevector_ieee_double_native_set_x | |
1792 | { | |
1793 | IEEE754_NATIVE_SET (double); | |
1794 | } | |
1795 | #undef FUNC_NAME | |
1796 | ||
1797 | ||
1798 | #undef IEEE754_UNION | |
1799 | #undef IEEE754_TO_SCM | |
1800 | #undef IEEE754_FROM_SCM | |
1801 | #undef IEEE754_FROM_FOREIGN_ENDIANNESS | |
1802 | #undef IEEE754_TO_FOREIGN_ENDIANNESS | |
1803 | #undef IEEE754_REF | |
1804 | #undef IEEE754_NATIVE_REF | |
1805 | #undef IEEE754_SET | |
1806 | #undef IEEE754_NATIVE_SET | |
1807 | ||
1808 | \f | |
1809 | /* Operations on strings. */ | |
1810 | ||
1811 | ||
1812 | /* Produce a function that returns the length of a UTF-encoded string. */ | |
1813 | #define UTF_STRLEN_FUNCTION(_utf_width) \ | |
1814 | static inline size_t \ | |
1815 | utf ## _utf_width ## _strlen (const uint ## _utf_width ## _t *str) \ | |
1816 | { \ | |
1817 | size_t len = 0; \ | |
1818 | const uint ## _utf_width ## _t *ptr; \ | |
1819 | for (ptr = str; \ | |
1820 | *ptr != 0; \ | |
1821 | ptr++) \ | |
1822 | { \ | |
1823 | len++; \ | |
1824 | } \ | |
1825 | \ | |
1826 | return (len * ((_utf_width) / 8)); \ | |
1827 | } | |
1828 | ||
1829 | UTF_STRLEN_FUNCTION (8) | |
1830 | ||
1831 | ||
1832 | /* Return the length (in bytes) of STR, a UTF-(UTF_WIDTH) encoded string. */ | |
1833 | #define UTF_STRLEN(_utf_width, _str) \ | |
1834 | utf ## _utf_width ## _strlen (_str) | |
1835 | ||
1836 | /* Return the "portable" name of the UTF encoding of size UTF_WIDTH and | |
1837 | ENDIANNESS (Gnulib's `iconv_open' module guarantees the portability of the | |
1838 | encoding name). */ | |
1839 | static inline void | |
1840 | utf_encoding_name (char *name, size_t utf_width, SCM endianness) | |
1841 | { | |
1842 | strcpy (name, "UTF-"); | |
1843 | strcat (name, ((utf_width == 8) | |
1844 | ? "8" | |
1845 | : ((utf_width == 16) | |
1846 | ? "16" | |
1847 | : ((utf_width == 32) | |
1848 | ? "32" | |
1849 | : "??")))); | |
1850 | strcat (name, | |
1851 | ((scm_is_eq (endianness, scm_sym_big)) | |
1852 | ? "BE" | |
1853 | : ((scm_is_eq (endianness, scm_sym_little)) | |
1854 | ? "LE" | |
1855 | : "unknown"))); | |
1856 | } | |
1857 | ||
1858 | /* Maximum length of a UTF encoding name. */ | |
1859 | #define MAX_UTF_ENCODING_NAME_LEN 16 | |
1860 | ||
1861 | /* Produce the body of a `string->utf' function. */ | |
1862 | #define STRING_TO_UTF(_utf_width) \ | |
1863 | SCM utf; \ | |
1864 | int err; \ | |
1865 | char *c_str; \ | |
1866 | char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \ | |
1867 | char *c_utf = NULL, *c_locale; \ | |
1868 | size_t c_strlen, c_raw_strlen, c_utf_len = 0; \ | |
1869 | \ | |
1870 | SCM_VALIDATE_STRING (1, str); \ | |
1871 | if (endianness == SCM_UNDEFINED) \ | |
1872 | endianness = scm_sym_big; \ | |
1873 | else \ | |
1874 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1875 | \ | |
1876 | c_strlen = scm_c_string_length (str); \ | |
1877 | c_raw_strlen = c_strlen * ((_utf_width) / 8); \ | |
1878 | do \ | |
1879 | { \ | |
1880 | c_str = (char *) alloca (c_raw_strlen + 1); \ | |
1881 | c_raw_strlen = scm_to_locale_stringbuf (str, c_str, c_strlen); \ | |
1882 | } \ | |
1883 | while (c_raw_strlen > c_strlen); \ | |
1884 | c_str[c_raw_strlen] = '\0'; \ | |
1885 | \ | |
1886 | utf_encoding_name (c_utf_name, (_utf_width), endianness); \ | |
1887 | \ | |
1888 | c_locale = (char *) alloca (strlen (locale_charset ()) + 1); \ | |
1889 | strcpy (c_locale, locale_charset ()); \ | |
1890 | \ | |
1891 | err = mem_iconveh (c_str, c_raw_strlen, \ | |
1892 | c_locale, c_utf_name, \ | |
1893 | iconveh_question_mark, NULL, \ | |
1894 | &c_utf, &c_utf_len); \ | |
1895 | if (SCM_UNLIKELY (err)) \ | |
1896 | scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \ | |
1897 | scm_list_1 (str), err); \ | |
1898 | else \ | |
1899 | /* C_UTF is null-terminated. */ \ | |
1900 | utf = scm_c_take_bytevector ((signed char *) c_utf, \ | |
1901 | c_utf_len); \ | |
1902 | \ | |
1903 | return (utf); | |
1904 | ||
1905 | ||
1906 | ||
1907 | SCM_DEFINE (scm_string_to_utf8, "string->utf8", | |
1908 | 1, 0, 0, | |
1909 | (SCM str), | |
1910 | "Return a newly allocated bytevector that contains the UTF-8 " | |
1911 | "encoding of @var{str}.") | |
1912 | #define FUNC_NAME s_scm_string_to_utf8 | |
1913 | { | |
1914 | SCM utf; | |
1915 | char *c_str; | |
1916 | uint8_t *c_utf; | |
1917 | size_t c_strlen, c_raw_strlen; | |
1918 | ||
1919 | SCM_VALIDATE_STRING (1, str); | |
1920 | ||
1921 | c_strlen = scm_c_string_length (str); | |
1922 | c_raw_strlen = c_strlen; | |
1923 | do | |
1924 | { | |
1925 | c_str = (char *) alloca (c_raw_strlen + 1); | |
1926 | c_raw_strlen = scm_to_locale_stringbuf (str, c_str, c_strlen); | |
1927 | } | |
1928 | while (c_raw_strlen > c_strlen); | |
1929 | c_str[c_raw_strlen] = '\0'; | |
1930 | ||
1931 | c_utf = u8_strconv_from_locale (c_str); | |
1932 | if (SCM_UNLIKELY (c_utf == NULL)) | |
1933 | scm_syserror (FUNC_NAME); | |
1934 | else | |
1935 | /* C_UTF is null-terminated. */ | |
1936 | utf = scm_c_take_bytevector ((signed char *) c_utf, | |
1937 | UTF_STRLEN (8, c_utf)); | |
1938 | ||
1939 | return (utf); | |
1940 | } | |
1941 | #undef FUNC_NAME | |
1942 | ||
1943 | SCM_DEFINE (scm_string_to_utf16, "string->utf16", | |
1944 | 1, 1, 0, | |
1945 | (SCM str, SCM endianness), | |
1946 | "Return a newly allocated bytevector that contains the UTF-16 " | |
1947 | "encoding of @var{str}.") | |
1948 | #define FUNC_NAME s_scm_string_to_utf16 | |
1949 | { | |
1950 | STRING_TO_UTF (16); | |
1951 | } | |
1952 | #undef FUNC_NAME | |
1953 | ||
1954 | SCM_DEFINE (scm_string_to_utf32, "string->utf32", | |
1955 | 1, 1, 0, | |
1956 | (SCM str, SCM endianness), | |
1957 | "Return a newly allocated bytevector that contains the UTF-32 " | |
1958 | "encoding of @var{str}.") | |
1959 | #define FUNC_NAME s_scm_string_to_utf32 | |
1960 | { | |
1961 | STRING_TO_UTF (32); | |
1962 | } | |
1963 | #undef FUNC_NAME | |
1964 | ||
1965 | ||
1966 | /* Produce the body of a function that converts a UTF-encoded bytevector to a | |
1967 | string. */ | |
1968 | #define UTF_TO_STRING(_utf_width) \ | |
1969 | SCM str = SCM_BOOL_F; \ | |
1970 | int err; \ | |
1971 | char *c_str = NULL, *c_locale; \ | |
1972 | char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \ | |
1973 | const char *c_utf; \ | |
1974 | size_t c_strlen = 0, c_utf_len; \ | |
1975 | \ | |
1976 | SCM_VALIDATE_BYTEVECTOR (1, utf); \ | |
1977 | if (endianness == SCM_UNDEFINED) \ | |
1978 | endianness = scm_sym_big; \ | |
1979 | else \ | |
1980 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1981 | \ | |
1982 | c_utf_len = SCM_BYTEVECTOR_LENGTH (utf); \ | |
1983 | c_utf = (char *) SCM_BYTEVECTOR_CONTENTS (utf); \ | |
1984 | utf_encoding_name (c_utf_name, (_utf_width), endianness); \ | |
1985 | \ | |
1986 | c_locale = (char *) alloca (strlen (locale_charset ()) + 1); \ | |
1987 | strcpy (c_locale, locale_charset ()); \ | |
1988 | \ | |
1989 | err = mem_iconveh (c_utf, c_utf_len, \ | |
1990 | c_utf_name, c_locale, \ | |
1991 | iconveh_question_mark, NULL, \ | |
1992 | &c_str, &c_strlen); \ | |
1993 | if (SCM_UNLIKELY (err)) \ | |
1994 | scm_syserror_msg (FUNC_NAME, "failed to convert to string: ~A", \ | |
1995 | scm_list_1 (utf), err); \ | |
1996 | else \ | |
1997 | /* C_STR is null-terminated. */ \ | |
1998 | str = scm_take_locale_stringn (c_str, c_strlen); \ | |
1999 | \ | |
2000 | return (str); | |
2001 | ||
2002 | ||
2003 | SCM_DEFINE (scm_utf8_to_string, "utf8->string", | |
2004 | 1, 0, 0, | |
2005 | (SCM utf), | |
2006 | "Return a newly allocate string that contains from the UTF-8-" | |
2007 | "encoded contents of bytevector @var{utf}.") | |
2008 | #define FUNC_NAME s_scm_utf8_to_string | |
2009 | { | |
2010 | SCM str; | |
2011 | int err; | |
2012 | char *c_str = NULL, *c_locale; | |
2013 | const char *c_utf; | |
2014 | size_t c_utf_len, c_strlen = 0; | |
2015 | ||
2016 | SCM_VALIDATE_BYTEVECTOR (1, utf); | |
2017 | ||
2018 | c_utf_len = SCM_BYTEVECTOR_LENGTH (utf); | |
2019 | ||
2020 | c_locale = (char *) alloca (strlen (locale_charset ()) + 1); | |
2021 | strcpy (c_locale, locale_charset ()); | |
2022 | ||
2023 | c_utf = (char *) SCM_BYTEVECTOR_CONTENTS (utf); | |
2024 | err = mem_iconveh (c_utf, c_utf_len, | |
2025 | "UTF-8", c_locale, | |
2026 | iconveh_question_mark, NULL, | |
2027 | &c_str, &c_strlen); | |
2028 | if (SCM_UNLIKELY (err)) | |
2029 | scm_syserror_msg (FUNC_NAME, "failed to convert to string: ~A", | |
2030 | scm_list_1 (utf), err); | |
2031 | else | |
2032 | /* C_STR is null-terminated. */ | |
2033 | str = scm_take_locale_stringn (c_str, c_strlen); | |
2034 | ||
2035 | return (str); | |
2036 | } | |
2037 | #undef FUNC_NAME | |
2038 | ||
2039 | SCM_DEFINE (scm_utf16_to_string, "utf16->string", | |
2040 | 1, 1, 0, | |
2041 | (SCM utf, SCM endianness), | |
2042 | "Return a newly allocate string that contains from the UTF-16-" | |
2043 | "encoded contents of bytevector @var{utf}.") | |
2044 | #define FUNC_NAME s_scm_utf16_to_string | |
2045 | { | |
2046 | UTF_TO_STRING (16); | |
2047 | } | |
2048 | #undef FUNC_NAME | |
2049 | ||
2050 | SCM_DEFINE (scm_utf32_to_string, "utf32->string", | |
2051 | 1, 1, 0, | |
2052 | (SCM utf, SCM endianness), | |
2053 | "Return a newly allocate string that contains from the UTF-32-" | |
2054 | "encoded contents of bytevector @var{utf}.") | |
2055 | #define FUNC_NAME s_scm_utf32_to_string | |
2056 | { | |
2057 | UTF_TO_STRING (32); | |
2058 | } | |
2059 | #undef FUNC_NAME | |
2060 | ||
2061 | ||
2062 | \f | |
2a610be5 AW |
2063 | /* Bytevectors as generalized vectors & arrays. */ |
2064 | ||
2065 | static SCM | |
2066 | bv_handle_ref (scm_t_array_handle *h, size_t index) | |
2067 | { | |
2068 | return SCM_I_MAKINUM (scm_c_bytevector_ref (h->array, index)); | |
2069 | } | |
2070 | ||
2071 | static void | |
2072 | bv_handle_set_x (scm_t_array_handle *h, size_t index, SCM val) | |
2073 | { | |
2074 | scm_c_bytevector_set_x (h->array, index, scm_to_uint8 (val)); | |
2075 | } | |
2076 | ||
2077 | static void | |
2078 | bytevector_get_handle (SCM v, scm_t_array_handle *h) | |
2079 | { | |
2080 | h->array = v; | |
2081 | h->ndims = 1; | |
2082 | h->dims = &h->dim0; | |
2083 | h->dim0.lbnd = 0; | |
2084 | h->dim0.ubnd = SCM_BYTEVECTOR_LENGTH (v) - 1; | |
2085 | h->dim0.inc = 1; | |
2086 | h->element_type = SCM_ARRAY_ELEMENT_TYPE_VU8; | |
2087 | h->elements = h->writable_elements = SCM_BYTEVECTOR_CONTENTS (v); | |
2088 | } | |
2089 | ||
2090 | \f | |
1ee2c72e LC |
2091 | /* Initialization. */ |
2092 | ||
cfb4702f LC |
2093 | void |
2094 | scm_bootstrap_bytevectors (void) | |
2095 | { | |
2096 | /* The SMOB type must be instantiated here because the | |
2097 | generalized-vector API may want to access bytevectors even though | |
2098 | `(rnrs bytevector)' hasn't been loaded. */ | |
2099 | scm_tc16_bytevector = scm_make_smob_type ("bytevector", 0); | |
2100 | scm_set_smob_free (scm_tc16_bytevector, free_bytevector); | |
2101 | scm_set_smob_print (scm_tc16_bytevector, print_bytevector); | |
2102 | scm_set_smob_equalp (scm_tc16_bytevector, bytevector_equal_p); | |
2103 | ||
2104 | scm_null_bytevector = | |
2105 | scm_gc_protect_object (make_bytevector_from_buffer (0, NULL)); | |
2106 | ||
caa92f5e AW |
2107 | #ifdef WORDS_BIGENDIAN |
2108 | scm_i_native_endianness = scm_permanent_object (scm_from_locale_symbol ("big")); | |
2109 | #else | |
2110 | scm_i_native_endianness = scm_permanent_object (scm_from_locale_symbol ("little")); | |
2111 | #endif | |
2112 | ||
cfb4702f LC |
2113 | scm_c_register_extension ("libguile", "scm_init_bytevectors", |
2114 | (scm_t_extension_init_func) scm_init_bytevectors, | |
2115 | NULL); | |
2a610be5 AW |
2116 | |
2117 | { | |
2118 | scm_t_array_implementation impl; | |
2119 | impl.tag = scm_tc16_bytevector; | |
2120 | impl.mask = 0xffff; | |
2121 | impl.vref = bv_handle_ref; | |
2122 | impl.vset = bv_handle_set_x; | |
2123 | impl.get_handle = bytevector_get_handle; | |
2124 | scm_i_register_array_implementation (&impl); | |
2125 | } | |
cfb4702f LC |
2126 | } |
2127 | ||
1ee2c72e LC |
2128 | void |
2129 | scm_init_bytevectors (void) | |
2130 | { | |
2131 | #include "libguile/bytevectors.x" | |
2132 | ||
1ee2c72e LC |
2133 | scm_endianness_big = scm_sym_big; |
2134 | scm_endianness_little = scm_sym_little; | |
1ee2c72e | 2135 | } |