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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> | |
f5a51cae | 25 | #include <assert.h> |
1ee2c72e LC |
26 | |
27 | #include <gmp.h> | |
28 | ||
29 | #include "libguile/_scm.h" | |
cfb4702f | 30 | #include "libguile/extensions.h" |
1ee2c72e LC |
31 | #include "libguile/bytevectors.h" |
32 | #include "libguile/strings.h" | |
33 | #include "libguile/validate.h" | |
34 | #include "libguile/ieee-754.h" | |
2fa901a5 | 35 | #include "libguile/arrays.h" |
2a610be5 | 36 | #include "libguile/array-handle.h" |
476b894c | 37 | #include "libguile/uniform.h" |
782a82ee | 38 | #include "libguile/srfi-4.h" |
1ee2c72e LC |
39 | |
40 | #include <byteswap.h> | |
41 | #include <striconveh.h> | |
42 | #include <uniconv.h> | |
3a5bc4fa | 43 | #include <unistr.h> |
1ee2c72e LC |
44 | |
45 | #ifdef HAVE_LIMITS_H | |
46 | # include <limits.h> | |
47 | #else | |
48 | /* Assuming 32-bit longs. */ | |
49 | # define ULONG_MAX 4294967295UL | |
50 | #endif | |
51 | ||
52 | #include <string.h> | |
53 | ||
54 | ||
55 | \f | |
56 | /* Utilities. */ | |
57 | ||
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 | |
74 | ||
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 | |
79 | ||
80 | ||
81 | #define INTEGER_ACCESSOR_PROLOGUE(_len, _sign) \ | |
2d34e924 | 82 | size_t c_len, c_index; \ |
1ee2c72e LC |
83 | _sign char *c_bv; \ |
84 | \ | |
85 | SCM_VALIDATE_BYTEVECTOR (1, bv); \ | |
86 | c_index = scm_to_uint (index); \ | |
87 | \ | |
88 | c_len = SCM_BYTEVECTOR_LENGTH (bv); \ | |
89 | c_bv = (_sign char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
90 | \ | |
91 | if (SCM_UNLIKELY (c_index + ((_len) >> 3UL) - 1 >= c_len)) \ | |
92 | scm_out_of_range (FUNC_NAME, index); | |
93 | ||
94 | /* Template for fixed-size integer access (only 8, 16 or 32-bit). */ | |
caa92f5e AW |
95 | #define INTEGER_REF(_len, _sign) \ |
96 | SCM result; \ | |
97 | \ | |
98 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
99 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
100 | \ | |
101 | { \ | |
102 | INT_TYPE (_len, _sign) c_result; \ | |
103 | \ | |
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); \ | |
107 | \ | |
108 | result = SCM_I_MAKINUM (c_result); \ | |
109 | } \ | |
110 | \ | |
1ee2c72e LC |
111 | return result; |
112 | ||
113 | /* Template for fixed-size integer access using the native endianness. */ | |
114 | #define INTEGER_NATIVE_REF(_len, _sign) \ | |
115 | SCM result; \ | |
116 | \ | |
117 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
118 | \ | |
119 | { \ | |
120 | INT_TYPE (_len, _sign) c_result; \ | |
121 | \ | |
122 | memcpy (&c_result, &c_bv[c_index], (_len) / 8); \ | |
123 | result = SCM_I_MAKINUM (c_result); \ | |
124 | } \ | |
125 | \ | |
126 | return result; | |
127 | ||
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); \ | |
132 | \ | |
133 | { \ | |
134 | _sign long c_value; \ | |
135 | INT_TYPE (_len, _sign) c_value_short; \ | |
136 | \ | |
137 | if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \ | |
138 | scm_wrong_type_arg (FUNC_NAME, 3, value); \ | |
139 | \ | |
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); \ | |
143 | \ | |
144 | c_value_short = (INT_TYPE (_len, _sign)) c_value; \ | |
caa92f5e | 145 | if (!scm_is_eq (endianness, scm_i_native_endianness)) \ |
1ee2c72e LC |
146 | c_value_short = INT_SWAP (_len) (c_value_short); \ |
147 | \ | |
148 | memcpy (&c_bv[c_index], &c_value_short, (_len) / 8); \ | |
149 | } \ | |
150 | \ | |
151 | return SCM_UNSPECIFIED; | |
152 | ||
153 | /* Template for fixed-size integer modification using the native | |
154 | endianness. */ | |
155 | #define INTEGER_NATIVE_SET(_len, _sign) \ | |
156 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
157 | \ | |
158 | { \ | |
159 | _sign long c_value; \ | |
160 | INT_TYPE (_len, _sign) c_value_short; \ | |
161 | \ | |
162 | if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \ | |
163 | scm_wrong_type_arg (FUNC_NAME, 3, value); \ | |
164 | \ | |
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); \ | |
168 | \ | |
169 | c_value_short = (INT_TYPE (_len, _sign)) c_value; \ | |
170 | \ | |
171 | memcpy (&c_bv[c_index], &c_value_short, (_len) / 8); \ | |
172 | } \ | |
173 | \ | |
174 | return SCM_UNSPECIFIED; | |
175 | ||
176 | ||
177 | \f | |
178 | /* Bytevector type. */ | |
179 | ||
0665b3ff LC |
180 | #define SCM_BYTEVECTOR_HEADER_BYTES \ |
181 | (SCM_BYTEVECTOR_HEADER_SIZE * sizeof (SCM)) | |
182 | ||
f332089e | 183 | #define SCM_BYTEVECTOR_SET_LENGTH(_bv, _len) \ |
807e5a66 | 184 | SCM_SET_CELL_WORD_1 ((_bv), (scm_t_bits) (_len)) |
3fe87cf7 LC |
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)) | |
191 | ||
192 | #define SCM_BYTEVECTOR_SET_ELEMENT_TYPE(bv, hint) \ | |
193 | SCM_SET_BYTEVECTOR_FLAGS ((bv), \ | |
194 | (hint) \ | |
195 | | (SCM_BYTEVECTOR_CONTIGUOUS_P (bv) << 8UL)) | |
e286c973 AW |
196 | #define SCM_BYTEVECTOR_TYPE_SIZE(var) \ |
197 | (scm_i_array_element_type_sizes[SCM_BYTEVECTOR_ELEMENT_TYPE (var)]/8) | |
198 | #define SCM_BYTEVECTOR_TYPED_LENGTH(var) \ | |
3fe87cf7 | 199 | (SCM_BYTEVECTOR_LENGTH (var) / SCM_BYTEVECTOR_TYPE_SIZE (var)) |
1ee2c72e LC |
200 | |
201 | /* The empty bytevector. */ | |
202 | SCM scm_null_bytevector = SCM_UNSPECIFIED; | |
203 | ||
204 | ||
205 | static inline SCM | |
0665b3ff | 206 | make_bytevector (size_t len, scm_t_array_element_type element_type) |
1ee2c72e | 207 | { |
f332089e | 208 | SCM ret; |
e286c973 | 209 | size_t c_len; |
0665b3ff | 210 | |
e286c973 AW |
211 | if (SCM_UNLIKELY (element_type > SCM_ARRAY_ELEMENT_TYPE_LAST |
212 | || scm_i_array_element_type_sizes[element_type] < 8 | |
213 | || len >= (SCM_I_SIZE_MAX | |
214 | / (scm_i_array_element_type_sizes[element_type]/8)))) | |
215 | /* This would be an internal Guile programming error */ | |
216 | abort (); | |
0665b3ff LC |
217 | |
218 | if (SCM_UNLIKELY (len == 0 && element_type == SCM_ARRAY_ELEMENT_TYPE_VU8 | |
219 | && SCM_BYTEVECTOR_P (scm_null_bytevector))) | |
220 | ret = scm_null_bytevector; | |
f332089e AW |
221 | else |
222 | { | |
3fe87cf7 LC |
223 | signed char *contents; |
224 | ||
0665b3ff LC |
225 | c_len = len * (scm_i_array_element_type_sizes[element_type] / 8); |
226 | ||
3fe87cf7 LC |
227 | contents = scm_gc_malloc_pointerless (SCM_BYTEVECTOR_HEADER_BYTES + c_len, |
228 | SCM_GC_BYTEVECTOR); | |
229 | ret = PTR2SCM (contents); | |
230 | contents += SCM_BYTEVECTOR_HEADER_BYTES; | |
0665b3ff | 231 | |
0665b3ff | 232 | SCM_BYTEVECTOR_SET_LENGTH (ret, c_len); |
3fe87cf7 LC |
233 | SCM_BYTEVECTOR_SET_CONTENTS (ret, contents); |
234 | SCM_BYTEVECTOR_SET_CONTIGUOUS_P (ret, 1); | |
0665b3ff | 235 | SCM_BYTEVECTOR_SET_ELEMENT_TYPE (ret, element_type); |
f332089e | 236 | } |
0665b3ff | 237 | |
f332089e | 238 | return ret; |
1ee2c72e LC |
239 | } |
240 | ||
0665b3ff | 241 | /* Return a bytevector of LEN elements of type ELEMENT_TYPE, with element |
3fe87cf7 LC |
242 | values taken from CONTENTS. Assume that the storage for CONTENTS will be |
243 | automatically reclaimed when it becomes unreachable. */ | |
1ee2c72e | 244 | static inline SCM |
0665b3ff LC |
245 | make_bytevector_from_buffer (size_t len, void *contents, |
246 | scm_t_array_element_type element_type) | |
1ee2c72e | 247 | { |
0665b3ff | 248 | SCM ret; |
1ee2c72e | 249 | |
3fe87cf7 LC |
250 | if (SCM_UNLIKELY (len == 0)) |
251 | ret = make_bytevector (len, element_type); | |
252 | else | |
1ee2c72e | 253 | { |
0665b3ff LC |
254 | size_t c_len; |
255 | ||
3fe87cf7 LC |
256 | ret = PTR2SCM (scm_gc_malloc (SCM_BYTEVECTOR_HEADER_BYTES, |
257 | SCM_GC_BYTEVECTOR)); | |
258 | ||
0665b3ff | 259 | c_len = len * (scm_i_array_element_type_sizes[element_type] / 8); |
0665b3ff | 260 | |
3fe87cf7 LC |
261 | SCM_BYTEVECTOR_SET_LENGTH (ret, c_len); |
262 | SCM_BYTEVECTOR_SET_CONTENTS (ret, contents); | |
263 | SCM_BYTEVECTOR_SET_CONTIGUOUS_P (ret, 0); | |
264 | SCM_BYTEVECTOR_SET_ELEMENT_TYPE (ret, element_type); | |
1ee2c72e | 265 | } |
0665b3ff LC |
266 | |
267 | return ret; | |
1ee2c72e LC |
268 | } |
269 | ||
0665b3ff | 270 | |
1ee2c72e LC |
271 | /* Return a new bytevector of size LEN octets. */ |
272 | SCM | |
2d34e924 | 273 | scm_c_make_bytevector (size_t len) |
1ee2c72e | 274 | { |
e286c973 AW |
275 | return make_bytevector (len, SCM_ARRAY_ELEMENT_TYPE_VU8); |
276 | } | |
277 | ||
1ee2c72e LC |
278 | /* Return a bytevector of size LEN made up of CONTENTS. The area pointed to |
279 | by CONTENTS must have been allocated using `scm_gc_malloc ()'. */ | |
280 | SCM | |
2d34e924 | 281 | scm_c_take_bytevector (signed char *contents, size_t len) |
1ee2c72e | 282 | { |
e286c973 AW |
283 | return make_bytevector_from_buffer (len, contents, SCM_ARRAY_ELEMENT_TYPE_VU8); |
284 | } | |
1ee2c72e | 285 | |
1ee2c72e | 286 | /* Shrink BV to C_NEW_LEN (which is assumed to be smaller than its current |
0665b3ff | 287 | size) and return the new bytevector (possibly different from BV). */ |
1ee2c72e | 288 | SCM |
0665b3ff | 289 | scm_c_shrink_bytevector (SCM bv, size_t c_new_len) |
1ee2c72e | 290 | { |
0665b3ff LC |
291 | SCM new_bv; |
292 | size_t c_len; | |
293 | ||
e286c973 AW |
294 | if (SCM_UNLIKELY (c_new_len % SCM_BYTEVECTOR_TYPE_SIZE (bv))) |
295 | /* This would be an internal Guile programming error */ | |
296 | abort (); | |
297 | ||
0665b3ff LC |
298 | c_len = SCM_BYTEVECTOR_LENGTH (bv); |
299 | if (SCM_UNLIKELY (c_new_len > c_len)) | |
300 | abort (); | |
1ee2c72e | 301 | |
0665b3ff | 302 | SCM_BYTEVECTOR_SET_LENGTH (bv, c_new_len); |
1ee2c72e | 303 | |
3fe87cf7 LC |
304 | if (SCM_BYTEVECTOR_CONTIGUOUS_P (bv)) |
305 | new_bv = PTR2SCM (scm_gc_realloc (SCM2PTR (bv), | |
306 | c_len + SCM_BYTEVECTOR_HEADER_BYTES, | |
307 | c_new_len + SCM_BYTEVECTOR_HEADER_BYTES, | |
308 | SCM_GC_BYTEVECTOR)); | |
309 | else | |
310 | { | |
311 | signed char *c_bv; | |
312 | ||
313 | c_bv = scm_gc_realloc (SCM_BYTEVECTOR_CONTENTS (bv), | |
314 | c_len, c_new_len, SCM_GC_BYTEVECTOR); | |
315 | SCM_BYTEVECTOR_SET_CONTENTS (bv, c_bv); | |
316 | ||
317 | new_bv = bv; | |
318 | } | |
1ee2c72e | 319 | |
0665b3ff | 320 | return new_bv; |
1ee2c72e LC |
321 | } |
322 | ||
404bb5f8 LC |
323 | int |
324 | scm_is_bytevector (SCM obj) | |
325 | { | |
807e5a66 | 326 | return SCM_BYTEVECTOR_P (obj); |
404bb5f8 LC |
327 | } |
328 | ||
329 | size_t | |
330 | scm_c_bytevector_length (SCM bv) | |
331 | #define FUNC_NAME "scm_c_bytevector_length" | |
332 | { | |
333 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
334 | ||
335 | return SCM_BYTEVECTOR_LENGTH (bv); | |
336 | } | |
337 | #undef FUNC_NAME | |
338 | ||
339 | scm_t_uint8 | |
340 | scm_c_bytevector_ref (SCM bv, size_t index) | |
341 | #define FUNC_NAME "scm_c_bytevector_ref" | |
342 | { | |
343 | size_t c_len; | |
344 | const scm_t_uint8 *c_bv; | |
345 | ||
346 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
347 | ||
348 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
349 | c_bv = (scm_t_uint8 *) SCM_BYTEVECTOR_CONTENTS (bv); | |
350 | ||
351 | if (SCM_UNLIKELY (index >= c_len)) | |
352 | scm_out_of_range (FUNC_NAME, scm_from_size_t (index)); | |
353 | ||
354 | return c_bv[index]; | |
355 | } | |
356 | #undef FUNC_NAME | |
357 | ||
358 | void | |
359 | scm_c_bytevector_set_x (SCM bv, size_t index, scm_t_uint8 value) | |
360 | #define FUNC_NAME "scm_c_bytevector_set_x" | |
361 | { | |
362 | size_t c_len; | |
363 | scm_t_uint8 *c_bv; | |
364 | ||
365 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
366 | ||
367 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
368 | c_bv = (scm_t_uint8 *) SCM_BYTEVECTOR_CONTENTS (bv); | |
369 | ||
370 | if (SCM_UNLIKELY (index >= c_len)) | |
371 | scm_out_of_range (FUNC_NAME, scm_from_size_t (index)); | |
372 | ||
373 | c_bv[index] = value; | |
374 | } | |
375 | #undef FUNC_NAME | |
376 | ||
e286c973 AW |
377 | |
378 | \f | |
807e5a66 LC |
379 | int |
380 | scm_i_print_bytevector (SCM bv, SCM port, scm_print_state *pstate SCM_UNUSED) | |
1ee2c72e | 381 | { |
e286c973 AW |
382 | ssize_t ubnd, inc, i; |
383 | scm_t_array_handle h; | |
384 | ||
385 | scm_array_get_handle (bv, &h); | |
1ee2c72e | 386 | |
e286c973 AW |
387 | scm_putc ('#', port); |
388 | scm_write (scm_array_handle_element_type (&h), port); | |
389 | scm_putc ('(', port); | |
390 | for (i = h.dims[0].lbnd, ubnd = h.dims[0].ubnd, inc = h.dims[0].inc; | |
391 | i <= ubnd; i += inc) | |
1ee2c72e LC |
392 | { |
393 | if (i > 0) | |
394 | scm_putc (' ', port); | |
e286c973 | 395 | scm_write (scm_array_handle_ref (&h, i), port); |
1ee2c72e | 396 | } |
1ee2c72e LC |
397 | scm_putc (')', port); |
398 | ||
1ee2c72e LC |
399 | return 1; |
400 | } | |
401 | ||
1ee2c72e LC |
402 | \f |
403 | /* General operations. */ | |
404 | ||
405 | SCM_SYMBOL (scm_sym_big, "big"); | |
406 | SCM_SYMBOL (scm_sym_little, "little"); | |
407 | ||
408 | SCM scm_endianness_big, scm_endianness_little; | |
409 | ||
410 | /* Host endianness (a symbol). */ | |
caa92f5e | 411 | SCM scm_i_native_endianness = SCM_UNSPECIFIED; |
1ee2c72e LC |
412 | |
413 | /* Byte-swapping. */ | |
414 | #ifndef bswap_24 | |
415 | # define bswap_24(_x) \ | |
416 | ((((_x) & 0xff0000) >> 16) | \ | |
417 | (((_x) & 0x00ff00)) | \ | |
418 | (((_x) & 0x0000ff) << 16)) | |
419 | #endif | |
420 | ||
421 | ||
422 | SCM_DEFINE (scm_native_endianness, "native-endianness", 0, 0, 0, | |
423 | (void), | |
424 | "Return a symbol denoting the machine's native endianness.") | |
425 | #define FUNC_NAME s_scm_native_endianness | |
426 | { | |
caa92f5e | 427 | return scm_i_native_endianness; |
1ee2c72e LC |
428 | } |
429 | #undef FUNC_NAME | |
430 | ||
431 | SCM_DEFINE (scm_bytevector_p, "bytevector?", 1, 0, 0, | |
432 | (SCM obj), | |
433 | "Return true if @var{obj} is a bytevector.") | |
434 | #define FUNC_NAME s_scm_bytevector_p | |
435 | { | |
404bb5f8 | 436 | return scm_from_bool (scm_is_bytevector (obj)); |
1ee2c72e LC |
437 | } |
438 | #undef FUNC_NAME | |
439 | ||
440 | SCM_DEFINE (scm_make_bytevector, "make-bytevector", 1, 1, 0, | |
441 | (SCM len, SCM fill), | |
442 | "Return a newly allocated bytevector of @var{len} bytes, " | |
443 | "optionally filled with @var{fill}.") | |
444 | #define FUNC_NAME s_scm_make_bytevector | |
445 | { | |
446 | SCM bv; | |
447 | unsigned c_len; | |
448 | signed char c_fill = '\0'; | |
449 | ||
450 | SCM_VALIDATE_UINT_COPY (1, len, c_len); | |
451 | if (fill != SCM_UNDEFINED) | |
452 | { | |
453 | int value; | |
454 | ||
455 | value = scm_to_int (fill); | |
456 | if (SCM_UNLIKELY ((value < -128) || (value > 255))) | |
457 | scm_out_of_range (FUNC_NAME, fill); | |
458 | c_fill = (signed char) value; | |
459 | } | |
460 | ||
e286c973 | 461 | bv = make_bytevector (c_len, SCM_ARRAY_ELEMENT_TYPE_VU8); |
1ee2c72e LC |
462 | if (fill != SCM_UNDEFINED) |
463 | { | |
464 | unsigned i; | |
465 | signed char *contents; | |
466 | ||
467 | contents = SCM_BYTEVECTOR_CONTENTS (bv); | |
468 | for (i = 0; i < c_len; i++) | |
469 | contents[i] = c_fill; | |
470 | } | |
471 | ||
472 | return bv; | |
473 | } | |
474 | #undef FUNC_NAME | |
475 | ||
476 | SCM_DEFINE (scm_bytevector_length, "bytevector-length", 1, 0, 0, | |
477 | (SCM bv), | |
478 | "Return the length (in bytes) of @var{bv}.") | |
479 | #define FUNC_NAME s_scm_bytevector_length | |
480 | { | |
404bb5f8 | 481 | return scm_from_uint (scm_c_bytevector_length (bv)); |
1ee2c72e LC |
482 | } |
483 | #undef FUNC_NAME | |
484 | ||
485 | SCM_DEFINE (scm_bytevector_eq_p, "bytevector=?", 2, 0, 0, | |
486 | (SCM bv1, SCM bv2), | |
487 | "Return is @var{bv1} equals to @var{bv2}---i.e., if they " | |
488 | "have the same length and contents.") | |
489 | #define FUNC_NAME s_scm_bytevector_eq_p | |
490 | { | |
491 | SCM result = SCM_BOOL_F; | |
492 | unsigned c_len1, c_len2; | |
493 | ||
494 | SCM_VALIDATE_BYTEVECTOR (1, bv1); | |
495 | SCM_VALIDATE_BYTEVECTOR (2, bv2); | |
496 | ||
497 | c_len1 = SCM_BYTEVECTOR_LENGTH (bv1); | |
498 | c_len2 = SCM_BYTEVECTOR_LENGTH (bv2); | |
499 | ||
500 | if (c_len1 == c_len2) | |
501 | { | |
502 | signed char *c_bv1, *c_bv2; | |
503 | ||
504 | c_bv1 = SCM_BYTEVECTOR_CONTENTS (bv1); | |
505 | c_bv2 = SCM_BYTEVECTOR_CONTENTS (bv2); | |
506 | ||
507 | result = scm_from_bool (!memcmp (c_bv1, c_bv2, c_len1)); | |
508 | } | |
509 | ||
510 | return result; | |
511 | } | |
512 | #undef FUNC_NAME | |
513 | ||
514 | SCM_DEFINE (scm_bytevector_fill_x, "bytevector-fill!", 2, 0, 0, | |
515 | (SCM bv, SCM fill), | |
516 | "Fill bytevector @var{bv} with @var{fill}, a byte.") | |
517 | #define FUNC_NAME s_scm_bytevector_fill_x | |
518 | { | |
519 | unsigned c_len, i; | |
520 | signed char *c_bv, c_fill; | |
521 | ||
522 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
523 | c_fill = scm_to_int8 (fill); | |
524 | ||
525 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
526 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
527 | ||
528 | for (i = 0; i < c_len; i++) | |
529 | c_bv[i] = c_fill; | |
530 | ||
531 | return SCM_UNSPECIFIED; | |
532 | } | |
533 | #undef FUNC_NAME | |
534 | ||
535 | SCM_DEFINE (scm_bytevector_copy_x, "bytevector-copy!", 5, 0, 0, | |
536 | (SCM source, SCM source_start, SCM target, SCM target_start, | |
537 | SCM len), | |
538 | "Copy @var{len} bytes from @var{source} into @var{target}, " | |
539 | "starting reading from @var{source_start} (a positive index " | |
540 | "within @var{source}) and start writing at " | |
541 | "@var{target_start}.") | |
542 | #define FUNC_NAME s_scm_bytevector_copy_x | |
543 | { | |
544 | unsigned c_len, c_source_len, c_target_len; | |
545 | unsigned c_source_start, c_target_start; | |
546 | signed char *c_source, *c_target; | |
547 | ||
548 | SCM_VALIDATE_BYTEVECTOR (1, source); | |
549 | SCM_VALIDATE_BYTEVECTOR (3, target); | |
550 | ||
551 | c_len = scm_to_uint (len); | |
552 | c_source_start = scm_to_uint (source_start); | |
553 | c_target_start = scm_to_uint (target_start); | |
554 | ||
555 | c_source = SCM_BYTEVECTOR_CONTENTS (source); | |
556 | c_target = SCM_BYTEVECTOR_CONTENTS (target); | |
557 | c_source_len = SCM_BYTEVECTOR_LENGTH (source); | |
558 | c_target_len = SCM_BYTEVECTOR_LENGTH (target); | |
559 | ||
560 | if (SCM_UNLIKELY (c_source_start + c_len > c_source_len)) | |
561 | scm_out_of_range (FUNC_NAME, source_start); | |
562 | if (SCM_UNLIKELY (c_target_start + c_len > c_target_len)) | |
563 | scm_out_of_range (FUNC_NAME, target_start); | |
564 | ||
565 | memcpy (c_target + c_target_start, | |
566 | c_source + c_source_start, | |
567 | c_len); | |
568 | ||
569 | return SCM_UNSPECIFIED; | |
570 | } | |
571 | #undef FUNC_NAME | |
572 | ||
573 | SCM_DEFINE (scm_bytevector_copy, "bytevector-copy", 1, 0, 0, | |
574 | (SCM bv), | |
575 | "Return a newly allocated copy of @var{bv}.") | |
576 | #define FUNC_NAME s_scm_bytevector_copy | |
577 | { | |
578 | SCM copy; | |
579 | unsigned c_len; | |
580 | signed char *c_bv, *c_copy; | |
581 | ||
582 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
583 | ||
584 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
585 | c_bv = SCM_BYTEVECTOR_CONTENTS (bv); | |
586 | ||
e286c973 | 587 | copy = make_bytevector (c_len, SCM_BYTEVECTOR_ELEMENT_TYPE (bv)); |
1ee2c72e LC |
588 | c_copy = SCM_BYTEVECTOR_CONTENTS (copy); |
589 | memcpy (c_copy, c_bv, c_len); | |
590 | ||
591 | return copy; | |
592 | } | |
593 | #undef FUNC_NAME | |
594 | ||
782a82ee AW |
595 | SCM_DEFINE (scm_uniform_array_to_bytevector, "uniform-array->bytevector", |
596 | 1, 0, 0, (SCM array), | |
597 | "Return a newly allocated bytevector whose contents\n" | |
598 | "will be copied from the uniform array @var{array}.") | |
599 | #define FUNC_NAME s_scm_uniform_array_to_bytevector | |
600 | { | |
601 | SCM contents, ret; | |
f5a51cae | 602 | size_t len, sz, byte_len; |
782a82ee | 603 | scm_t_array_handle h; |
f5a51cae | 604 | const void *elts; |
782a82ee AW |
605 | |
606 | contents = scm_array_contents (array, SCM_BOOL_T); | |
607 | if (scm_is_false (contents)) | |
608 | scm_wrong_type_arg_msg (FUNC_NAME, 0, array, "uniform contiguous array"); | |
609 | ||
610 | scm_array_get_handle (contents, &h); | |
f5a51cae | 611 | assert (h.base == 0); |
782a82ee | 612 | |
f5a51cae | 613 | elts = h.elements; |
782a82ee | 614 | len = h.dims->inc * (h.dims->ubnd - h.dims->lbnd + 1); |
f5a51cae AW |
615 | sz = scm_array_handle_uniform_element_bit_size (&h); |
616 | if (sz >= 8 && ((sz % 8) == 0)) | |
617 | byte_len = len * (sz / 8); | |
b0fae4ec | 618 | else if (sz < 8) |
29553c54 LC |
619 | /* byte_len = ceil (len * sz / 8) */ |
620 | byte_len = (len * sz + 7) / 8; | |
b0fae4ec AW |
621 | else |
622 | /* an internal guile error, really */ | |
623 | SCM_MISC_ERROR ("uniform elements larger than 8 bits must fill whole bytes", SCM_EOL); | |
782a82ee | 624 | |
f5a51cae AW |
625 | ret = make_bytevector (byte_len, SCM_ARRAY_ELEMENT_TYPE_VU8); |
626 | memcpy (SCM_BYTEVECTOR_CONTENTS (ret), elts, byte_len); | |
782a82ee AW |
627 | |
628 | scm_array_handle_release (&h); | |
629 | ||
630 | return ret; | |
631 | } | |
632 | #undef FUNC_NAME | |
633 | ||
1ee2c72e LC |
634 | \f |
635 | /* Operations on bytes and octets. */ | |
636 | ||
637 | SCM_DEFINE (scm_bytevector_u8_ref, "bytevector-u8-ref", 2, 0, 0, | |
638 | (SCM bv, SCM index), | |
639 | "Return the octet located at @var{index} in @var{bv}.") | |
640 | #define FUNC_NAME s_scm_bytevector_u8_ref | |
641 | { | |
642 | INTEGER_NATIVE_REF (8, unsigned); | |
643 | } | |
644 | #undef FUNC_NAME | |
645 | ||
646 | SCM_DEFINE (scm_bytevector_s8_ref, "bytevector-s8-ref", 2, 0, 0, | |
647 | (SCM bv, SCM index), | |
648 | "Return the byte located at @var{index} in @var{bv}.") | |
649 | #define FUNC_NAME s_scm_bytevector_s8_ref | |
650 | { | |
651 | INTEGER_NATIVE_REF (8, signed); | |
652 | } | |
653 | #undef FUNC_NAME | |
654 | ||
655 | SCM_DEFINE (scm_bytevector_u8_set_x, "bytevector-u8-set!", 3, 0, 0, | |
656 | (SCM bv, SCM index, SCM value), | |
657 | "Return the octet located at @var{index} in @var{bv}.") | |
658 | #define FUNC_NAME s_scm_bytevector_u8_set_x | |
659 | { | |
660 | INTEGER_NATIVE_SET (8, unsigned); | |
661 | } | |
662 | #undef FUNC_NAME | |
663 | ||
664 | SCM_DEFINE (scm_bytevector_s8_set_x, "bytevector-s8-set!", 3, 0, 0, | |
665 | (SCM bv, SCM index, SCM value), | |
666 | "Return the octet located at @var{index} in @var{bv}.") | |
cabf1b31 | 667 | #define FUNC_NAME s_scm_bytevector_s8_set_x |
1ee2c72e LC |
668 | { |
669 | INTEGER_NATIVE_SET (8, signed); | |
670 | } | |
671 | #undef FUNC_NAME | |
672 | ||
673 | #undef OCTET_ACCESSOR_PROLOGUE | |
674 | ||
675 | ||
676 | SCM_DEFINE (scm_bytevector_to_u8_list, "bytevector->u8-list", 1, 0, 0, | |
677 | (SCM bv), | |
678 | "Return a newly allocated list of octets containing the " | |
679 | "contents of @var{bv}.") | |
680 | #define FUNC_NAME s_scm_bytevector_to_u8_list | |
681 | { | |
682 | SCM lst, pair; | |
683 | unsigned c_len, i; | |
684 | unsigned char *c_bv; | |
685 | ||
686 | SCM_VALIDATE_BYTEVECTOR (1, bv); | |
687 | ||
688 | c_len = SCM_BYTEVECTOR_LENGTH (bv); | |
689 | c_bv = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv); | |
690 | ||
691 | lst = scm_make_list (scm_from_uint (c_len), SCM_UNSPECIFIED); | |
692 | for (i = 0, pair = lst; | |
693 | i < c_len; | |
694 | i++, pair = SCM_CDR (pair)) | |
695 | { | |
696 | SCM_SETCAR (pair, SCM_I_MAKINUM (c_bv[i])); | |
697 | } | |
698 | ||
699 | return lst; | |
700 | } | |
701 | #undef FUNC_NAME | |
702 | ||
703 | SCM_DEFINE (scm_u8_list_to_bytevector, "u8-list->bytevector", 1, 0, 0, | |
704 | (SCM lst), | |
705 | "Turn @var{lst}, a list of octets, into a bytevector.") | |
706 | #define FUNC_NAME s_scm_u8_list_to_bytevector | |
707 | { | |
708 | SCM bv, item; | |
709 | long c_len, i; | |
710 | unsigned char *c_bv; | |
711 | ||
712 | SCM_VALIDATE_LIST_COPYLEN (1, lst, c_len); | |
713 | ||
e286c973 | 714 | bv = make_bytevector (c_len, SCM_ARRAY_ELEMENT_TYPE_VU8); |
1ee2c72e LC |
715 | c_bv = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv); |
716 | ||
717 | for (i = 0; i < c_len; lst = SCM_CDR (lst), i++) | |
718 | { | |
719 | item = SCM_CAR (lst); | |
720 | ||
721 | if (SCM_LIKELY (SCM_I_INUMP (item))) | |
722 | { | |
723 | long c_item; | |
724 | ||
725 | c_item = SCM_I_INUM (item); | |
726 | if (SCM_LIKELY ((c_item >= 0) && (c_item < 256))) | |
727 | c_bv[i] = (unsigned char) c_item; | |
728 | else | |
729 | goto type_error; | |
730 | } | |
731 | else | |
732 | goto type_error; | |
733 | } | |
734 | ||
735 | return bv; | |
736 | ||
737 | type_error: | |
738 | scm_wrong_type_arg (FUNC_NAME, 1, item); | |
739 | ||
740 | return SCM_BOOL_F; | |
741 | } | |
742 | #undef FUNC_NAME | |
743 | ||
744 | /* Compute the two's complement of VALUE (a positive integer) on SIZE octets | |
745 | using (2^(SIZE * 8) - VALUE). */ | |
746 | static inline void | |
747 | twos_complement (mpz_t value, size_t size) | |
748 | { | |
749 | unsigned long bit_count; | |
750 | ||
751 | /* We expect BIT_COUNT to fit in a unsigned long thanks to the range | |
752 | checking on SIZE performed earlier. */ | |
753 | bit_count = (unsigned long) size << 3UL; | |
754 | ||
755 | if (SCM_LIKELY (bit_count < sizeof (unsigned long))) | |
756 | mpz_ui_sub (value, 1UL << bit_count, value); | |
757 | else | |
758 | { | |
759 | mpz_t max; | |
760 | ||
761 | mpz_init (max); | |
762 | mpz_ui_pow_ui (max, 2, bit_count); | |
763 | mpz_sub (value, max, value); | |
764 | mpz_clear (max); | |
765 | } | |
766 | } | |
767 | ||
768 | static inline SCM | |
769 | bytevector_large_ref (const char *c_bv, size_t c_size, int signed_p, | |
770 | SCM endianness) | |
771 | { | |
772 | SCM result; | |
773 | mpz_t c_mpz; | |
774 | int c_endianness, negative_p = 0; | |
775 | ||
776 | if (signed_p) | |
777 | { | |
778 | if (scm_is_eq (endianness, scm_sym_big)) | |
779 | negative_p = c_bv[0] & 0x80; | |
780 | else | |
781 | negative_p = c_bv[c_size - 1] & 0x80; | |
782 | } | |
783 | ||
784 | c_endianness = scm_is_eq (endianness, scm_sym_big) ? 1 : -1; | |
785 | ||
786 | mpz_init (c_mpz); | |
787 | mpz_import (c_mpz, 1 /* 1 word */, 1 /* word order doesn't matter */, | |
788 | c_size /* word is C_SIZE-byte long */, | |
789 | c_endianness, | |
790 | 0 /* nails */, c_bv); | |
791 | ||
792 | if (signed_p && negative_p) | |
793 | { | |
794 | twos_complement (c_mpz, c_size); | |
795 | mpz_neg (c_mpz, c_mpz); | |
796 | } | |
797 | ||
798 | result = scm_from_mpz (c_mpz); | |
799 | mpz_clear (c_mpz); /* FIXME: Needed? */ | |
800 | ||
801 | return result; | |
802 | } | |
803 | ||
804 | static inline int | |
805 | bytevector_large_set (char *c_bv, size_t c_size, int signed_p, | |
806 | SCM value, SCM endianness) | |
807 | { | |
808 | mpz_t c_mpz; | |
809 | int c_endianness, c_sign, err = 0; | |
810 | ||
811 | c_endianness = scm_is_eq (endianness, scm_sym_big) ? 1 : -1; | |
812 | ||
813 | mpz_init (c_mpz); | |
814 | scm_to_mpz (value, c_mpz); | |
815 | ||
816 | c_sign = mpz_sgn (c_mpz); | |
817 | if (c_sign < 0) | |
818 | { | |
819 | if (SCM_LIKELY (signed_p)) | |
820 | { | |
821 | mpz_neg (c_mpz, c_mpz); | |
822 | twos_complement (c_mpz, c_size); | |
823 | } | |
824 | else | |
825 | { | |
826 | err = -1; | |
827 | goto finish; | |
828 | } | |
829 | } | |
830 | ||
831 | if (c_sign == 0) | |
832 | /* Zero. */ | |
833 | memset (c_bv, 0, c_size); | |
834 | else | |
835 | { | |
836 | size_t word_count, value_size; | |
837 | ||
838 | value_size = (mpz_sizeinbase (c_mpz, 2) + (8 * c_size)) / (8 * c_size); | |
839 | if (SCM_UNLIKELY (value_size > c_size)) | |
840 | { | |
841 | err = -2; | |
842 | goto finish; | |
843 | } | |
844 | ||
845 | ||
846 | mpz_export (c_bv, &word_count, 1 /* word order doesn't matter */, | |
847 | c_size, c_endianness, | |
848 | 0 /* nails */, c_mpz); | |
849 | if (SCM_UNLIKELY (word_count != 1)) | |
850 | /* Shouldn't happen since we already checked with VALUE_SIZE. */ | |
851 | abort (); | |
852 | } | |
853 | ||
854 | finish: | |
855 | mpz_clear (c_mpz); | |
856 | ||
857 | return err; | |
858 | } | |
859 | ||
860 | #define GENERIC_INTEGER_ACCESSOR_PROLOGUE(_sign) \ | |
861 | unsigned long c_len, c_index, c_size; \ | |
862 | char *c_bv; \ | |
863 | \ | |
864 | SCM_VALIDATE_BYTEVECTOR (1, bv); \ | |
865 | c_index = scm_to_ulong (index); \ | |
866 | c_size = scm_to_ulong (size); \ | |
867 | \ | |
868 | c_len = SCM_BYTEVECTOR_LENGTH (bv); \ | |
869 | c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
870 | \ | |
871 | /* C_SIZE must have its 3 higher bits set to zero so that \ | |
872 | multiplying it by 8 yields a number that fits in an \ | |
873 | unsigned long. */ \ | |
874 | if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \ | |
875 | scm_out_of_range (FUNC_NAME, size); \ | |
876 | if (SCM_UNLIKELY (c_index + c_size > c_len)) \ | |
877 | scm_out_of_range (FUNC_NAME, index); | |
878 | ||
879 | ||
880 | /* Template of an integer reference function. */ | |
881 | #define GENERIC_INTEGER_REF(_sign) \ | |
882 | SCM result; \ | |
883 | \ | |
884 | if (c_size < 3) \ | |
885 | { \ | |
886 | int swap; \ | |
887 | _sign int value; \ | |
888 | \ | |
caa92f5e | 889 | swap = !scm_is_eq (endianness, scm_i_native_endianness); \ |
1ee2c72e LC |
890 | switch (c_size) \ |
891 | { \ | |
892 | case 1: \ | |
893 | { \ | |
894 | _sign char c_value8; \ | |
895 | memcpy (&c_value8, c_bv, 1); \ | |
896 | value = c_value8; \ | |
897 | } \ | |
898 | break; \ | |
899 | case 2: \ | |
900 | { \ | |
901 | INT_TYPE (16, _sign) c_value16; \ | |
902 | memcpy (&c_value16, c_bv, 2); \ | |
903 | if (swap) \ | |
904 | value = (INT_TYPE (16, _sign)) bswap_16 (c_value16); \ | |
905 | else \ | |
906 | value = c_value16; \ | |
907 | } \ | |
908 | break; \ | |
909 | default: \ | |
910 | abort (); \ | |
911 | } \ | |
912 | \ | |
913 | result = SCM_I_MAKINUM ((_sign int) value); \ | |
914 | } \ | |
915 | else \ | |
916 | result = bytevector_large_ref ((char *) c_bv, \ | |
917 | c_size, SIGNEDNESS (_sign), \ | |
918 | endianness); \ | |
919 | \ | |
920 | return result; | |
921 | ||
922 | static inline SCM | |
923 | bytevector_signed_ref (const char *c_bv, size_t c_size, SCM endianness) | |
924 | { | |
925 | GENERIC_INTEGER_REF (signed); | |
926 | } | |
927 | ||
928 | static inline SCM | |
929 | bytevector_unsigned_ref (const char *c_bv, size_t c_size, SCM endianness) | |
930 | { | |
931 | GENERIC_INTEGER_REF (unsigned); | |
932 | } | |
933 | ||
934 | ||
935 | /* Template of an integer assignment function. */ | |
936 | #define GENERIC_INTEGER_SET(_sign) \ | |
937 | if (c_size < 3) \ | |
938 | { \ | |
939 | _sign int c_value; \ | |
940 | \ | |
941 | if (SCM_UNLIKELY (!SCM_I_INUMP (value))) \ | |
942 | goto range_error; \ | |
943 | \ | |
944 | c_value = SCM_I_INUM (value); \ | |
945 | switch (c_size) \ | |
946 | { \ | |
947 | case 1: \ | |
948 | if (SCM_LIKELY (INT_VALID_P (8, _sign) (c_value))) \ | |
949 | { \ | |
950 | _sign char c_value8; \ | |
951 | c_value8 = (_sign char) c_value; \ | |
952 | memcpy (c_bv, &c_value8, 1); \ | |
953 | } \ | |
954 | else \ | |
955 | goto range_error; \ | |
956 | break; \ | |
957 | \ | |
958 | case 2: \ | |
959 | if (SCM_LIKELY (INT_VALID_P (16, _sign) (c_value))) \ | |
960 | { \ | |
961 | int swap; \ | |
962 | INT_TYPE (16, _sign) c_value16; \ | |
963 | \ | |
caa92f5e | 964 | swap = !scm_is_eq (endianness, scm_i_native_endianness); \ |
1ee2c72e LC |
965 | \ |
966 | if (swap) \ | |
967 | c_value16 = (INT_TYPE (16, _sign)) bswap_16 (c_value); \ | |
968 | else \ | |
969 | c_value16 = c_value; \ | |
970 | \ | |
971 | memcpy (c_bv, &c_value16, 2); \ | |
972 | } \ | |
973 | else \ | |
974 | goto range_error; \ | |
975 | break; \ | |
976 | \ | |
977 | default: \ | |
978 | abort (); \ | |
979 | } \ | |
980 | } \ | |
981 | else \ | |
982 | { \ | |
983 | int err; \ | |
984 | \ | |
985 | err = bytevector_large_set (c_bv, c_size, \ | |
986 | SIGNEDNESS (_sign), \ | |
987 | value, endianness); \ | |
988 | if (err) \ | |
989 | goto range_error; \ | |
990 | } \ | |
991 | \ | |
992 | return; \ | |
993 | \ | |
994 | range_error: \ | |
995 | scm_out_of_range (FUNC_NAME, value); \ | |
996 | return; | |
997 | ||
998 | static inline void | |
999 | bytevector_signed_set (char *c_bv, size_t c_size, | |
1000 | SCM value, SCM endianness, | |
1001 | const char *func_name) | |
1002 | #define FUNC_NAME func_name | |
1003 | { | |
1004 | GENERIC_INTEGER_SET (signed); | |
1005 | } | |
1006 | #undef FUNC_NAME | |
1007 | ||
1008 | static inline void | |
1009 | bytevector_unsigned_set (char *c_bv, size_t c_size, | |
1010 | SCM value, SCM endianness, | |
1011 | const char *func_name) | |
1012 | #define FUNC_NAME func_name | |
1013 | { | |
1014 | GENERIC_INTEGER_SET (unsigned); | |
1015 | } | |
1016 | #undef FUNC_NAME | |
1017 | ||
1018 | #undef GENERIC_INTEGER_SET | |
1019 | #undef GENERIC_INTEGER_REF | |
1020 | ||
1021 | ||
1022 | SCM_DEFINE (scm_bytevector_uint_ref, "bytevector-uint-ref", 4, 0, 0, | |
1023 | (SCM bv, SCM index, SCM endianness, SCM size), | |
1024 | "Return the @var{size}-octet long unsigned integer at index " | |
1025 | "@var{index} in @var{bv}.") | |
1026 | #define FUNC_NAME s_scm_bytevector_uint_ref | |
1027 | { | |
1028 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned); | |
1029 | ||
1030 | return (bytevector_unsigned_ref (&c_bv[c_index], c_size, endianness)); | |
1031 | } | |
1032 | #undef FUNC_NAME | |
1033 | ||
1034 | SCM_DEFINE (scm_bytevector_sint_ref, "bytevector-sint-ref", 4, 0, 0, | |
1035 | (SCM bv, SCM index, SCM endianness, SCM size), | |
1036 | "Return the @var{size}-octet long unsigned integer at index " | |
1037 | "@var{index} in @var{bv}.") | |
1038 | #define FUNC_NAME s_scm_bytevector_sint_ref | |
1039 | { | |
1040 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed); | |
1041 | ||
1042 | return (bytevector_signed_ref (&c_bv[c_index], c_size, endianness)); | |
1043 | } | |
1044 | #undef FUNC_NAME | |
1045 | ||
1046 | SCM_DEFINE (scm_bytevector_uint_set_x, "bytevector-uint-set!", 5, 0, 0, | |
1047 | (SCM bv, SCM index, SCM value, SCM endianness, SCM size), | |
1048 | "Set the @var{size}-octet long unsigned integer at @var{index} " | |
1049 | "to @var{value}.") | |
1050 | #define FUNC_NAME s_scm_bytevector_uint_set_x | |
1051 | { | |
1052 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (unsigned); | |
1053 | ||
1054 | bytevector_unsigned_set (&c_bv[c_index], c_size, value, endianness, | |
1055 | FUNC_NAME); | |
1056 | ||
1057 | return SCM_UNSPECIFIED; | |
1058 | } | |
1059 | #undef FUNC_NAME | |
1060 | ||
1061 | SCM_DEFINE (scm_bytevector_sint_set_x, "bytevector-sint-set!", 5, 0, 0, | |
1062 | (SCM bv, SCM index, SCM value, SCM endianness, SCM size), | |
1063 | "Set the @var{size}-octet long signed integer at @var{index} " | |
1064 | "to @var{value}.") | |
1065 | #define FUNC_NAME s_scm_bytevector_sint_set_x | |
1066 | { | |
1067 | GENERIC_INTEGER_ACCESSOR_PROLOGUE (signed); | |
1068 | ||
1069 | bytevector_signed_set (&c_bv[c_index], c_size, value, endianness, | |
1070 | FUNC_NAME); | |
1071 | ||
1072 | return SCM_UNSPECIFIED; | |
1073 | } | |
1074 | #undef FUNC_NAME | |
1075 | ||
1076 | ||
1077 | \f | |
1078 | /* Operations on integers of arbitrary size. */ | |
1079 | ||
1080 | #define INTEGERS_TO_LIST(_sign) \ | |
1081 | SCM lst, pair; \ | |
1082 | size_t i, c_len, c_size; \ | |
1083 | \ | |
1084 | SCM_VALIDATE_BYTEVECTOR (1, bv); \ | |
1085 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1086 | c_size = scm_to_uint (size); \ | |
1087 | \ | |
1088 | c_len = SCM_BYTEVECTOR_LENGTH (bv); \ | |
1089 | if (SCM_UNLIKELY (c_len == 0)) \ | |
1090 | lst = SCM_EOL; \ | |
1091 | else if (SCM_UNLIKELY (c_len < c_size)) \ | |
1092 | scm_out_of_range (FUNC_NAME, size); \ | |
1093 | else \ | |
1094 | { \ | |
1095 | const char *c_bv; \ | |
1096 | \ | |
1097 | c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \ | |
1098 | \ | |
1099 | lst = scm_make_list (scm_from_uint (c_len / c_size), \ | |
1100 | SCM_UNSPECIFIED); \ | |
1101 | for (i = 0, pair = lst; \ | |
1102 | i <= c_len - c_size; \ | |
1103 | i += c_size, c_bv += c_size, pair = SCM_CDR (pair)) \ | |
1104 | { \ | |
1105 | SCM_SETCAR (pair, \ | |
1106 | bytevector_ ## _sign ## _ref (c_bv, c_size, \ | |
1107 | endianness)); \ | |
1108 | } \ | |
1109 | } \ | |
1110 | \ | |
1111 | return lst; | |
1112 | ||
1113 | SCM_DEFINE (scm_bytevector_to_sint_list, "bytevector->sint-list", | |
1114 | 3, 0, 0, | |
1115 | (SCM bv, SCM endianness, SCM size), | |
1116 | "Return a list of signed integers of @var{size} octets " | |
1117 | "representing the contents of @var{bv}.") | |
1118 | #define FUNC_NAME s_scm_bytevector_to_sint_list | |
1119 | { | |
1120 | INTEGERS_TO_LIST (signed); | |
1121 | } | |
1122 | #undef FUNC_NAME | |
1123 | ||
1124 | SCM_DEFINE (scm_bytevector_to_uint_list, "bytevector->uint-list", | |
1125 | 3, 0, 0, | |
1126 | (SCM bv, SCM endianness, SCM size), | |
1127 | "Return a list of unsigned integers of @var{size} octets " | |
1128 | "representing the contents of @var{bv}.") | |
1129 | #define FUNC_NAME s_scm_bytevector_to_uint_list | |
1130 | { | |
1131 | INTEGERS_TO_LIST (unsigned); | |
1132 | } | |
1133 | #undef FUNC_NAME | |
1134 | ||
1135 | #undef INTEGER_TO_LIST | |
1136 | ||
1137 | ||
1138 | #define INTEGER_LIST_TO_BYTEVECTOR(_sign) \ | |
1139 | SCM bv; \ | |
1140 | long c_len; \ | |
1141 | size_t c_size; \ | |
1142 | char *c_bv, *c_bv_ptr; \ | |
1143 | \ | |
1144 | SCM_VALIDATE_LIST_COPYLEN (1, lst, c_len); \ | |
1145 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1146 | c_size = scm_to_uint (size); \ | |
1147 | \ | |
1148 | if (SCM_UNLIKELY ((c_size == 0) || (c_size >= (ULONG_MAX >> 3L)))) \ | |
1149 | scm_out_of_range (FUNC_NAME, size); \ | |
1150 | \ | |
e286c973 | 1151 | bv = make_bytevector (c_len * c_size, SCM_ARRAY_ELEMENT_TYPE_VU8); \ |
1ee2c72e LC |
1152 | c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \ |
1153 | \ | |
1154 | for (c_bv_ptr = c_bv; \ | |
1155 | !scm_is_null (lst); \ | |
1156 | lst = SCM_CDR (lst), c_bv_ptr += c_size) \ | |
1157 | { \ | |
1158 | bytevector_ ## _sign ## _set (c_bv_ptr, c_size, \ | |
1159 | SCM_CAR (lst), endianness, \ | |
1160 | FUNC_NAME); \ | |
1161 | } \ | |
1162 | \ | |
1163 | return bv; | |
1164 | ||
1165 | ||
1166 | SCM_DEFINE (scm_uint_list_to_bytevector, "uint-list->bytevector", | |
1167 | 3, 0, 0, | |
1168 | (SCM lst, SCM endianness, SCM size), | |
1169 | "Return a bytevector containing the unsigned integers " | |
1170 | "listed in @var{lst} and encoded on @var{size} octets " | |
1171 | "according to @var{endianness}.") | |
1172 | #define FUNC_NAME s_scm_uint_list_to_bytevector | |
1173 | { | |
1174 | INTEGER_LIST_TO_BYTEVECTOR (unsigned); | |
1175 | } | |
1176 | #undef FUNC_NAME | |
1177 | ||
1178 | SCM_DEFINE (scm_sint_list_to_bytevector, "sint-list->bytevector", | |
1179 | 3, 0, 0, | |
1180 | (SCM lst, SCM endianness, SCM size), | |
1181 | "Return a bytevector containing the signed integers " | |
1182 | "listed in @var{lst} and encoded on @var{size} octets " | |
1183 | "according to @var{endianness}.") | |
1184 | #define FUNC_NAME s_scm_sint_list_to_bytevector | |
1185 | { | |
1186 | INTEGER_LIST_TO_BYTEVECTOR (signed); | |
1187 | } | |
1188 | #undef FUNC_NAME | |
1189 | ||
1190 | #undef INTEGER_LIST_TO_BYTEVECTOR | |
1191 | ||
1192 | ||
1193 | \f | |
1194 | /* Operations on 16-bit integers. */ | |
1195 | ||
1196 | SCM_DEFINE (scm_bytevector_u16_ref, "bytevector-u16-ref", | |
1197 | 3, 0, 0, | |
1198 | (SCM bv, SCM index, SCM endianness), | |
1199 | "Return the unsigned 16-bit integer from @var{bv} at " | |
1200 | "@var{index}.") | |
1201 | #define FUNC_NAME s_scm_bytevector_u16_ref | |
1202 | { | |
1203 | INTEGER_REF (16, unsigned); | |
1204 | } | |
1205 | #undef FUNC_NAME | |
1206 | ||
1207 | SCM_DEFINE (scm_bytevector_s16_ref, "bytevector-s16-ref", | |
1208 | 3, 0, 0, | |
1209 | (SCM bv, SCM index, SCM endianness), | |
1210 | "Return the signed 16-bit integer from @var{bv} at " | |
1211 | "@var{index}.") | |
1212 | #define FUNC_NAME s_scm_bytevector_s16_ref | |
1213 | { | |
1214 | INTEGER_REF (16, signed); | |
1215 | } | |
1216 | #undef FUNC_NAME | |
1217 | ||
1218 | SCM_DEFINE (scm_bytevector_u16_native_ref, "bytevector-u16-native-ref", | |
1219 | 2, 0, 0, | |
1220 | (SCM bv, SCM index), | |
1221 | "Return the unsigned 16-bit integer from @var{bv} at " | |
1222 | "@var{index} using the native endianness.") | |
1223 | #define FUNC_NAME s_scm_bytevector_u16_native_ref | |
1224 | { | |
1225 | INTEGER_NATIVE_REF (16, unsigned); | |
1226 | } | |
1227 | #undef FUNC_NAME | |
1228 | ||
1229 | SCM_DEFINE (scm_bytevector_s16_native_ref, "bytevector-s16-native-ref", | |
1230 | 2, 0, 0, | |
1231 | (SCM bv, SCM index), | |
1232 | "Return the unsigned 16-bit integer from @var{bv} at " | |
1233 | "@var{index} using the native endianness.") | |
1234 | #define FUNC_NAME s_scm_bytevector_s16_native_ref | |
1235 | { | |
1236 | INTEGER_NATIVE_REF (16, signed); | |
1237 | } | |
1238 | #undef FUNC_NAME | |
1239 | ||
1240 | SCM_DEFINE (scm_bytevector_u16_set_x, "bytevector-u16-set!", | |
1241 | 4, 0, 0, | |
1242 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1243 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1244 | "@var{endianness}.") | |
1245 | #define FUNC_NAME s_scm_bytevector_u16_set_x | |
1246 | { | |
1247 | INTEGER_SET (16, unsigned); | |
1248 | } | |
1249 | #undef FUNC_NAME | |
1250 | ||
1251 | SCM_DEFINE (scm_bytevector_s16_set_x, "bytevector-s16-set!", | |
1252 | 4, 0, 0, | |
1253 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1254 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1255 | "@var{endianness}.") | |
1256 | #define FUNC_NAME s_scm_bytevector_s16_set_x | |
1257 | { | |
1258 | INTEGER_SET (16, signed); | |
1259 | } | |
1260 | #undef FUNC_NAME | |
1261 | ||
1262 | SCM_DEFINE (scm_bytevector_u16_native_set_x, "bytevector-u16-native-set!", | |
1263 | 3, 0, 0, | |
1264 | (SCM bv, SCM index, SCM value), | |
1265 | "Store the unsigned integer @var{value} at index @var{index} " | |
1266 | "of @var{bv} using the native endianness.") | |
1267 | #define FUNC_NAME s_scm_bytevector_u16_native_set_x | |
1268 | { | |
1269 | INTEGER_NATIVE_SET (16, unsigned); | |
1270 | } | |
1271 | #undef FUNC_NAME | |
1272 | ||
1273 | SCM_DEFINE (scm_bytevector_s16_native_set_x, "bytevector-s16-native-set!", | |
1274 | 3, 0, 0, | |
1275 | (SCM bv, SCM index, SCM value), | |
1276 | "Store the signed integer @var{value} at index @var{index} " | |
1277 | "of @var{bv} using the native endianness.") | |
1278 | #define FUNC_NAME s_scm_bytevector_s16_native_set_x | |
1279 | { | |
1280 | INTEGER_NATIVE_SET (16, signed); | |
1281 | } | |
1282 | #undef FUNC_NAME | |
1283 | ||
1284 | ||
1285 | \f | |
1286 | /* Operations on 32-bit integers. */ | |
1287 | ||
1288 | /* Unfortunately, on 32-bit machines `SCM' is not large enough to hold | |
1289 | arbitrary 32-bit integers. Thus we fall back to using the | |
1290 | `large_{ref,set}' variants on 32-bit machines. */ | |
1291 | ||
1292 | #define LARGE_INTEGER_REF(_len, _sign) \ | |
1293 | INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \ | |
1294 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
1295 | \ | |
1296 | return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \ | |
1297 | SIGNEDNESS (_sign), endianness)); | |
1298 | ||
1299 | #define LARGE_INTEGER_SET(_len, _sign) \ | |
1300 | int err; \ | |
1301 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
1302 | SCM_VALIDATE_SYMBOL (4, endianness); \ | |
1303 | \ | |
1304 | err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \ | |
1305 | SIGNEDNESS (_sign), value, endianness); \ | |
1306 | if (SCM_UNLIKELY (err)) \ | |
1307 | scm_out_of_range (FUNC_NAME, value); \ | |
1308 | \ | |
1309 | return SCM_UNSPECIFIED; | |
1310 | ||
1311 | #define LARGE_INTEGER_NATIVE_REF(_len, _sign) \ | |
1312 | INTEGER_ACCESSOR_PROLOGUE(_len, _sign); \ | |
1313 | return (bytevector_large_ref ((char *) c_bv + c_index, _len / 8, \ | |
caa92f5e | 1314 | SIGNEDNESS (_sign), scm_i_native_endianness)); |
1ee2c72e LC |
1315 | |
1316 | #define LARGE_INTEGER_NATIVE_SET(_len, _sign) \ | |
1317 | int err; \ | |
1318 | INTEGER_ACCESSOR_PROLOGUE (_len, _sign); \ | |
1319 | \ | |
1320 | err = bytevector_large_set ((char *) c_bv + c_index, _len / 8, \ | |
1321 | SIGNEDNESS (_sign), value, \ | |
caa92f5e | 1322 | scm_i_native_endianness); \ |
1ee2c72e LC |
1323 | if (SCM_UNLIKELY (err)) \ |
1324 | scm_out_of_range (FUNC_NAME, value); \ | |
1325 | \ | |
1326 | return SCM_UNSPECIFIED; | |
1327 | ||
1328 | ||
1329 | SCM_DEFINE (scm_bytevector_u32_ref, "bytevector-u32-ref", | |
1330 | 3, 0, 0, | |
1331 | (SCM bv, SCM index, SCM endianness), | |
1332 | "Return the unsigned 32-bit integer from @var{bv} at " | |
1333 | "@var{index}.") | |
1334 | #define FUNC_NAME s_scm_bytevector_u32_ref | |
1335 | { | |
1336 | #if SIZEOF_VOID_P > 4 | |
1337 | INTEGER_REF (32, unsigned); | |
1338 | #else | |
1339 | LARGE_INTEGER_REF (32, unsigned); | |
1340 | #endif | |
1341 | } | |
1342 | #undef FUNC_NAME | |
1343 | ||
1344 | SCM_DEFINE (scm_bytevector_s32_ref, "bytevector-s32-ref", | |
1345 | 3, 0, 0, | |
1346 | (SCM bv, SCM index, SCM endianness), | |
1347 | "Return the signed 32-bit integer from @var{bv} at " | |
1348 | "@var{index}.") | |
1349 | #define FUNC_NAME s_scm_bytevector_s32_ref | |
1350 | { | |
1351 | #if SIZEOF_VOID_P > 4 | |
1352 | INTEGER_REF (32, signed); | |
1353 | #else | |
1354 | LARGE_INTEGER_REF (32, signed); | |
1355 | #endif | |
1356 | } | |
1357 | #undef FUNC_NAME | |
1358 | ||
1359 | SCM_DEFINE (scm_bytevector_u32_native_ref, "bytevector-u32-native-ref", | |
1360 | 2, 0, 0, | |
1361 | (SCM bv, SCM index), | |
1362 | "Return the unsigned 32-bit integer from @var{bv} at " | |
1363 | "@var{index} using the native endianness.") | |
1364 | #define FUNC_NAME s_scm_bytevector_u32_native_ref | |
1365 | { | |
1366 | #if SIZEOF_VOID_P > 4 | |
1367 | INTEGER_NATIVE_REF (32, unsigned); | |
1368 | #else | |
1369 | LARGE_INTEGER_NATIVE_REF (32, unsigned); | |
1370 | #endif | |
1371 | } | |
1372 | #undef FUNC_NAME | |
1373 | ||
1374 | SCM_DEFINE (scm_bytevector_s32_native_ref, "bytevector-s32-native-ref", | |
1375 | 2, 0, 0, | |
1376 | (SCM bv, SCM index), | |
1377 | "Return the unsigned 32-bit integer from @var{bv} at " | |
1378 | "@var{index} using the native endianness.") | |
1379 | #define FUNC_NAME s_scm_bytevector_s32_native_ref | |
1380 | { | |
1381 | #if SIZEOF_VOID_P > 4 | |
1382 | INTEGER_NATIVE_REF (32, signed); | |
1383 | #else | |
1384 | LARGE_INTEGER_NATIVE_REF (32, signed); | |
1385 | #endif | |
1386 | } | |
1387 | #undef FUNC_NAME | |
1388 | ||
1389 | SCM_DEFINE (scm_bytevector_u32_set_x, "bytevector-u32-set!", | |
1390 | 4, 0, 0, | |
1391 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1392 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1393 | "@var{endianness}.") | |
1394 | #define FUNC_NAME s_scm_bytevector_u32_set_x | |
1395 | { | |
1396 | #if SIZEOF_VOID_P > 4 | |
1397 | INTEGER_SET (32, unsigned); | |
1398 | #else | |
1399 | LARGE_INTEGER_SET (32, unsigned); | |
1400 | #endif | |
1401 | } | |
1402 | #undef FUNC_NAME | |
1403 | ||
1404 | SCM_DEFINE (scm_bytevector_s32_set_x, "bytevector-s32-set!", | |
1405 | 4, 0, 0, | |
1406 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1407 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1408 | "@var{endianness}.") | |
1409 | #define FUNC_NAME s_scm_bytevector_s32_set_x | |
1410 | { | |
1411 | #if SIZEOF_VOID_P > 4 | |
1412 | INTEGER_SET (32, signed); | |
1413 | #else | |
1414 | LARGE_INTEGER_SET (32, signed); | |
1415 | #endif | |
1416 | } | |
1417 | #undef FUNC_NAME | |
1418 | ||
1419 | SCM_DEFINE (scm_bytevector_u32_native_set_x, "bytevector-u32-native-set!", | |
1420 | 3, 0, 0, | |
1421 | (SCM bv, SCM index, SCM value), | |
1422 | "Store the unsigned integer @var{value} at index @var{index} " | |
1423 | "of @var{bv} using the native endianness.") | |
1424 | #define FUNC_NAME s_scm_bytevector_u32_native_set_x | |
1425 | { | |
1426 | #if SIZEOF_VOID_P > 4 | |
1427 | INTEGER_NATIVE_SET (32, unsigned); | |
1428 | #else | |
1429 | LARGE_INTEGER_NATIVE_SET (32, unsigned); | |
1430 | #endif | |
1431 | } | |
1432 | #undef FUNC_NAME | |
1433 | ||
1434 | SCM_DEFINE (scm_bytevector_s32_native_set_x, "bytevector-s32-native-set!", | |
1435 | 3, 0, 0, | |
1436 | (SCM bv, SCM index, SCM value), | |
1437 | "Store the signed integer @var{value} at index @var{index} " | |
1438 | "of @var{bv} using the native endianness.") | |
1439 | #define FUNC_NAME s_scm_bytevector_s32_native_set_x | |
1440 | { | |
1441 | #if SIZEOF_VOID_P > 4 | |
1442 | INTEGER_NATIVE_SET (32, signed); | |
1443 | #else | |
1444 | LARGE_INTEGER_NATIVE_SET (32, signed); | |
1445 | #endif | |
1446 | } | |
1447 | #undef FUNC_NAME | |
1448 | ||
1449 | ||
1450 | \f | |
1451 | /* Operations on 64-bit integers. */ | |
1452 | ||
1453 | /* For 64-bit integers, we use only the `large_{ref,set}' variant. */ | |
1454 | ||
1455 | SCM_DEFINE (scm_bytevector_u64_ref, "bytevector-u64-ref", | |
1456 | 3, 0, 0, | |
1457 | (SCM bv, SCM index, SCM endianness), | |
1458 | "Return the unsigned 64-bit integer from @var{bv} at " | |
1459 | "@var{index}.") | |
1460 | #define FUNC_NAME s_scm_bytevector_u64_ref | |
1461 | { | |
1462 | LARGE_INTEGER_REF (64, unsigned); | |
1463 | } | |
1464 | #undef FUNC_NAME | |
1465 | ||
1466 | SCM_DEFINE (scm_bytevector_s64_ref, "bytevector-s64-ref", | |
1467 | 3, 0, 0, | |
1468 | (SCM bv, SCM index, SCM endianness), | |
1469 | "Return the signed 64-bit integer from @var{bv} at " | |
1470 | "@var{index}.") | |
1471 | #define FUNC_NAME s_scm_bytevector_s64_ref | |
1472 | { | |
1473 | LARGE_INTEGER_REF (64, signed); | |
1474 | } | |
1475 | #undef FUNC_NAME | |
1476 | ||
1477 | SCM_DEFINE (scm_bytevector_u64_native_ref, "bytevector-u64-native-ref", | |
1478 | 2, 0, 0, | |
1479 | (SCM bv, SCM index), | |
1480 | "Return the unsigned 64-bit integer from @var{bv} at " | |
1481 | "@var{index} using the native endianness.") | |
1482 | #define FUNC_NAME s_scm_bytevector_u64_native_ref | |
1483 | { | |
1484 | LARGE_INTEGER_NATIVE_REF (64, unsigned); | |
1485 | } | |
1486 | #undef FUNC_NAME | |
1487 | ||
1488 | SCM_DEFINE (scm_bytevector_s64_native_ref, "bytevector-s64-native-ref", | |
1489 | 2, 0, 0, | |
1490 | (SCM bv, SCM index), | |
1491 | "Return the unsigned 64-bit integer from @var{bv} at " | |
1492 | "@var{index} using the native endianness.") | |
1493 | #define FUNC_NAME s_scm_bytevector_s64_native_ref | |
1494 | { | |
1495 | LARGE_INTEGER_NATIVE_REF (64, signed); | |
1496 | } | |
1497 | #undef FUNC_NAME | |
1498 | ||
1499 | SCM_DEFINE (scm_bytevector_u64_set_x, "bytevector-u64-set!", | |
1500 | 4, 0, 0, | |
1501 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1502 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1503 | "@var{endianness}.") | |
1504 | #define FUNC_NAME s_scm_bytevector_u64_set_x | |
1505 | { | |
1506 | LARGE_INTEGER_SET (64, unsigned); | |
1507 | } | |
1508 | #undef FUNC_NAME | |
1509 | ||
1510 | SCM_DEFINE (scm_bytevector_s64_set_x, "bytevector-s64-set!", | |
1511 | 4, 0, 0, | |
1512 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1513 | "Store @var{value} in @var{bv} at @var{index} according to " | |
1514 | "@var{endianness}.") | |
1515 | #define FUNC_NAME s_scm_bytevector_s64_set_x | |
1516 | { | |
1517 | LARGE_INTEGER_SET (64, signed); | |
1518 | } | |
1519 | #undef FUNC_NAME | |
1520 | ||
1521 | SCM_DEFINE (scm_bytevector_u64_native_set_x, "bytevector-u64-native-set!", | |
1522 | 3, 0, 0, | |
1523 | (SCM bv, SCM index, SCM value), | |
1524 | "Store the unsigned integer @var{value} at index @var{index} " | |
1525 | "of @var{bv} using the native endianness.") | |
1526 | #define FUNC_NAME s_scm_bytevector_u64_native_set_x | |
1527 | { | |
1528 | LARGE_INTEGER_NATIVE_SET (64, unsigned); | |
1529 | } | |
1530 | #undef FUNC_NAME | |
1531 | ||
1532 | SCM_DEFINE (scm_bytevector_s64_native_set_x, "bytevector-s64-native-set!", | |
1533 | 3, 0, 0, | |
1534 | (SCM bv, SCM index, SCM value), | |
1535 | "Store the signed integer @var{value} at index @var{index} " | |
1536 | "of @var{bv} using the native endianness.") | |
1537 | #define FUNC_NAME s_scm_bytevector_s64_native_set_x | |
1538 | { | |
1539 | LARGE_INTEGER_NATIVE_SET (64, signed); | |
1540 | } | |
1541 | #undef FUNC_NAME | |
1542 | ||
1543 | ||
1544 | \f | |
1545 | /* Operations on IEEE-754 numbers. */ | |
1546 | ||
1547 | /* There are two possible word endians, visible in glibc's <ieee754.h>. | |
1548 | However, in R6RS, when the endianness is `little', little endian is | |
1549 | assumed for both the byte order and the word order. This is clear from | |
1550 | Section 2.1 of R6RS-lib (in response to | |
1551 | http://www.r6rs.org/formal-comments/comment-187.txt). */ | |
1552 | ||
1553 | ||
1554 | /* Convert to/from a floating-point number with different endianness. This | |
1555 | method is probably not the most efficient but it should be portable. */ | |
1556 | ||
1557 | static inline void | |
1558 | float_to_foreign_endianness (union scm_ieee754_float *target, | |
1559 | float source) | |
1560 | { | |
1561 | union scm_ieee754_float src; | |
1562 | ||
1563 | src.f = source; | |
1564 | ||
1565 | #ifdef WORDS_BIGENDIAN | |
1566 | /* Assuming little endian for both byte and word order. */ | |
1567 | target->little_endian.negative = src.big_endian.negative; | |
1568 | target->little_endian.exponent = src.big_endian.exponent; | |
1569 | target->little_endian.mantissa = src.big_endian.mantissa; | |
1570 | #else | |
1571 | target->big_endian.negative = src.little_endian.negative; | |
1572 | target->big_endian.exponent = src.little_endian.exponent; | |
1573 | target->big_endian.mantissa = src.little_endian.mantissa; | |
1574 | #endif | |
1575 | } | |
1576 | ||
1577 | static inline float | |
1578 | float_from_foreign_endianness (const union scm_ieee754_float *source) | |
1579 | { | |
1580 | union scm_ieee754_float result; | |
1581 | ||
1582 | #ifdef WORDS_BIGENDIAN | |
1583 | /* Assuming little endian for both byte and word order. */ | |
1584 | result.big_endian.negative = source->little_endian.negative; | |
1585 | result.big_endian.exponent = source->little_endian.exponent; | |
1586 | result.big_endian.mantissa = source->little_endian.mantissa; | |
1587 | #else | |
1588 | result.little_endian.negative = source->big_endian.negative; | |
1589 | result.little_endian.exponent = source->big_endian.exponent; | |
1590 | result.little_endian.mantissa = source->big_endian.mantissa; | |
1591 | #endif | |
1592 | ||
1593 | return (result.f); | |
1594 | } | |
1595 | ||
1596 | static inline void | |
1597 | double_to_foreign_endianness (union scm_ieee754_double *target, | |
1598 | double source) | |
1599 | { | |
1600 | union scm_ieee754_double src; | |
1601 | ||
1602 | src.d = source; | |
1603 | ||
1604 | #ifdef WORDS_BIGENDIAN | |
1605 | /* Assuming little endian for both byte and word order. */ | |
1606 | target->little_little_endian.negative = src.big_endian.negative; | |
1607 | target->little_little_endian.exponent = src.big_endian.exponent; | |
1608 | target->little_little_endian.mantissa0 = src.big_endian.mantissa0; | |
1609 | target->little_little_endian.mantissa1 = src.big_endian.mantissa1; | |
1610 | #else | |
1611 | target->big_endian.negative = src.little_little_endian.negative; | |
1612 | target->big_endian.exponent = src.little_little_endian.exponent; | |
1613 | target->big_endian.mantissa0 = src.little_little_endian.mantissa0; | |
1614 | target->big_endian.mantissa1 = src.little_little_endian.mantissa1; | |
1615 | #endif | |
1616 | } | |
1617 | ||
1618 | static inline double | |
1619 | double_from_foreign_endianness (const union scm_ieee754_double *source) | |
1620 | { | |
1621 | union scm_ieee754_double result; | |
1622 | ||
1623 | #ifdef WORDS_BIGENDIAN | |
1624 | /* Assuming little endian for both byte and word order. */ | |
1625 | result.big_endian.negative = source->little_little_endian.negative; | |
1626 | result.big_endian.exponent = source->little_little_endian.exponent; | |
1627 | result.big_endian.mantissa0 = source->little_little_endian.mantissa0; | |
1628 | result.big_endian.mantissa1 = source->little_little_endian.mantissa1; | |
1629 | #else | |
1630 | result.little_little_endian.negative = source->big_endian.negative; | |
1631 | result.little_little_endian.exponent = source->big_endian.exponent; | |
1632 | result.little_little_endian.mantissa0 = source->big_endian.mantissa0; | |
1633 | result.little_little_endian.mantissa1 = source->big_endian.mantissa1; | |
1634 | #endif | |
1635 | ||
1636 | return (result.d); | |
1637 | } | |
1638 | ||
1639 | /* Template macros to abstract over doubles and floats. | |
1640 | XXX: Guile can only convert to/from doubles. */ | |
1641 | #define IEEE754_UNION(_c_type) union scm_ieee754_ ## _c_type | |
1642 | #define IEEE754_TO_SCM(_c_type) scm_from_double | |
1643 | #define IEEE754_FROM_SCM(_c_type) scm_to_double | |
1644 | #define IEEE754_FROM_FOREIGN_ENDIANNESS(_c_type) \ | |
1645 | _c_type ## _from_foreign_endianness | |
1646 | #define IEEE754_TO_FOREIGN_ENDIANNESS(_c_type) \ | |
1647 | _c_type ## _to_foreign_endianness | |
1648 | ||
1649 | ||
cd43fdc5 AW |
1650 | /* FIXME: SCM_VALIDATE_REAL rejects integers, etc. grrr */ |
1651 | #define VALIDATE_REAL(pos, v) \ | |
1652 | do { \ | |
1653 | SCM_ASSERT_TYPE (scm_is_true (scm_rational_p (v)), v, pos, FUNC_NAME, "real"); \ | |
1654 | } while (0) | |
1655 | ||
1ee2c72e LC |
1656 | /* Templace getters and setters. */ |
1657 | ||
1658 | #define IEEE754_ACCESSOR_PROLOGUE(_type) \ | |
1659 | INTEGER_ACCESSOR_PROLOGUE (sizeof (_type) << 3UL, signed); | |
1660 | ||
1661 | #define IEEE754_REF(_type) \ | |
1662 | _type c_result; \ | |
1663 | \ | |
1664 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
1665 | SCM_VALIDATE_SYMBOL (3, endianness); \ | |
1666 | \ | |
caa92f5e | 1667 | if (scm_is_eq (endianness, scm_i_native_endianness)) \ |
1ee2c72e LC |
1668 | memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \ |
1669 | else \ | |
1670 | { \ | |
1671 | IEEE754_UNION (_type) c_raw; \ | |
1672 | \ | |
1673 | memcpy (&c_raw, &c_bv[c_index], sizeof (c_raw)); \ | |
1674 | c_result = \ | |
1675 | IEEE754_FROM_FOREIGN_ENDIANNESS (_type) (&c_raw); \ | |
1676 | } \ | |
1677 | \ | |
1678 | return (IEEE754_TO_SCM (_type) (c_result)); | |
1679 | ||
1680 | #define IEEE754_NATIVE_REF(_type) \ | |
1681 | _type c_result; \ | |
1682 | \ | |
1683 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
1684 | \ | |
1685 | memcpy (&c_result, &c_bv[c_index], sizeof (c_result)); \ | |
1686 | return (IEEE754_TO_SCM (_type) (c_result)); | |
1687 | ||
1688 | #define IEEE754_SET(_type) \ | |
1689 | _type c_value; \ | |
1690 | \ | |
1691 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
cd43fdc5 | 1692 | VALIDATE_REAL (3, value); \ |
1ee2c72e LC |
1693 | SCM_VALIDATE_SYMBOL (4, endianness); \ |
1694 | c_value = IEEE754_FROM_SCM (_type) (value); \ | |
1695 | \ | |
caa92f5e | 1696 | if (scm_is_eq (endianness, scm_i_native_endianness)) \ |
1ee2c72e LC |
1697 | memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \ |
1698 | else \ | |
1699 | { \ | |
1700 | IEEE754_UNION (_type) c_raw; \ | |
1701 | \ | |
1702 | IEEE754_TO_FOREIGN_ENDIANNESS (_type) (&c_raw, c_value); \ | |
1703 | memcpy (&c_bv[c_index], &c_raw, sizeof (c_raw)); \ | |
1704 | } \ | |
1705 | \ | |
1706 | return SCM_UNSPECIFIED; | |
1707 | ||
1708 | #define IEEE754_NATIVE_SET(_type) \ | |
1709 | _type c_value; \ | |
1710 | \ | |
1711 | IEEE754_ACCESSOR_PROLOGUE (_type); \ | |
cd43fdc5 | 1712 | VALIDATE_REAL (3, value); \ |
1ee2c72e LC |
1713 | c_value = IEEE754_FROM_SCM (_type) (value); \ |
1714 | \ | |
1715 | memcpy (&c_bv[c_index], &c_value, sizeof (c_value)); \ | |
1716 | return SCM_UNSPECIFIED; | |
1717 | ||
1718 | ||
1719 | /* Single precision. */ | |
1720 | ||
1721 | SCM_DEFINE (scm_bytevector_ieee_single_ref, | |
1722 | "bytevector-ieee-single-ref", | |
1723 | 3, 0, 0, | |
1724 | (SCM bv, SCM index, SCM endianness), | |
1725 | "Return the IEEE-754 single from @var{bv} at " | |
1726 | "@var{index}.") | |
1727 | #define FUNC_NAME s_scm_bytevector_ieee_single_ref | |
1728 | { | |
1729 | IEEE754_REF (float); | |
1730 | } | |
1731 | #undef FUNC_NAME | |
1732 | ||
1733 | SCM_DEFINE (scm_bytevector_ieee_single_native_ref, | |
1734 | "bytevector-ieee-single-native-ref", | |
1735 | 2, 0, 0, | |
1736 | (SCM bv, SCM index), | |
1737 | "Return the IEEE-754 single from @var{bv} at " | |
1738 | "@var{index} using the native endianness.") | |
1739 | #define FUNC_NAME s_scm_bytevector_ieee_single_native_ref | |
1740 | { | |
1741 | IEEE754_NATIVE_REF (float); | |
1742 | } | |
1743 | #undef FUNC_NAME | |
1744 | ||
1745 | SCM_DEFINE (scm_bytevector_ieee_single_set_x, | |
1746 | "bytevector-ieee-single-set!", | |
1747 | 4, 0, 0, | |
1748 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1749 | "Store real @var{value} in @var{bv} at @var{index} according to " | |
1750 | "@var{endianness}.") | |
1751 | #define FUNC_NAME s_scm_bytevector_ieee_single_set_x | |
1752 | { | |
1753 | IEEE754_SET (float); | |
1754 | } | |
1755 | #undef FUNC_NAME | |
1756 | ||
1757 | SCM_DEFINE (scm_bytevector_ieee_single_native_set_x, | |
1758 | "bytevector-ieee-single-native-set!", | |
1759 | 3, 0, 0, | |
1760 | (SCM bv, SCM index, SCM value), | |
1761 | "Store the real @var{value} at index @var{index} " | |
1762 | "of @var{bv} using the native endianness.") | |
1763 | #define FUNC_NAME s_scm_bytevector_ieee_single_native_set_x | |
1764 | { | |
1765 | IEEE754_NATIVE_SET (float); | |
1766 | } | |
1767 | #undef FUNC_NAME | |
1768 | ||
1769 | ||
1770 | /* Double precision. */ | |
1771 | ||
1772 | SCM_DEFINE (scm_bytevector_ieee_double_ref, | |
1773 | "bytevector-ieee-double-ref", | |
1774 | 3, 0, 0, | |
1775 | (SCM bv, SCM index, SCM endianness), | |
1776 | "Return the IEEE-754 double from @var{bv} at " | |
1777 | "@var{index}.") | |
1778 | #define FUNC_NAME s_scm_bytevector_ieee_double_ref | |
1779 | { | |
1780 | IEEE754_REF (double); | |
1781 | } | |
1782 | #undef FUNC_NAME | |
1783 | ||
1784 | SCM_DEFINE (scm_bytevector_ieee_double_native_ref, | |
1785 | "bytevector-ieee-double-native-ref", | |
1786 | 2, 0, 0, | |
1787 | (SCM bv, SCM index), | |
1788 | "Return the IEEE-754 double from @var{bv} at " | |
1789 | "@var{index} using the native endianness.") | |
1790 | #define FUNC_NAME s_scm_bytevector_ieee_double_native_ref | |
1791 | { | |
1792 | IEEE754_NATIVE_REF (double); | |
1793 | } | |
1794 | #undef FUNC_NAME | |
1795 | ||
1796 | SCM_DEFINE (scm_bytevector_ieee_double_set_x, | |
1797 | "bytevector-ieee-double-set!", | |
1798 | 4, 0, 0, | |
1799 | (SCM bv, SCM index, SCM value, SCM endianness), | |
1800 | "Store real @var{value} in @var{bv} at @var{index} according to " | |
1801 | "@var{endianness}.") | |
1802 | #define FUNC_NAME s_scm_bytevector_ieee_double_set_x | |
1803 | { | |
1804 | IEEE754_SET (double); | |
1805 | } | |
1806 | #undef FUNC_NAME | |
1807 | ||
1808 | SCM_DEFINE (scm_bytevector_ieee_double_native_set_x, | |
1809 | "bytevector-ieee-double-native-set!", | |
1810 | 3, 0, 0, | |
1811 | (SCM bv, SCM index, SCM value), | |
1812 | "Store the real @var{value} at index @var{index} " | |
1813 | "of @var{bv} using the native endianness.") | |
1814 | #define FUNC_NAME s_scm_bytevector_ieee_double_native_set_x | |
1815 | { | |
1816 | IEEE754_NATIVE_SET (double); | |
1817 | } | |
1818 | #undef FUNC_NAME | |
1819 | ||
1820 | ||
1821 | #undef IEEE754_UNION | |
1822 | #undef IEEE754_TO_SCM | |
1823 | #undef IEEE754_FROM_SCM | |
1824 | #undef IEEE754_FROM_FOREIGN_ENDIANNESS | |
1825 | #undef IEEE754_TO_FOREIGN_ENDIANNESS | |
1826 | #undef IEEE754_REF | |
1827 | #undef IEEE754_NATIVE_REF | |
1828 | #undef IEEE754_SET | |
1829 | #undef IEEE754_NATIVE_SET | |
1830 | ||
1831 | \f | |
1832 | /* Operations on strings. */ | |
1833 | ||
1834 | ||
1835 | /* Produce a function that returns the length of a UTF-encoded string. */ | |
1836 | #define UTF_STRLEN_FUNCTION(_utf_width) \ | |
1837 | static inline size_t \ | |
1838 | utf ## _utf_width ## _strlen (const uint ## _utf_width ## _t *str) \ | |
1839 | { \ | |
1840 | size_t len = 0; \ | |
1841 | const uint ## _utf_width ## _t *ptr; \ | |
1842 | for (ptr = str; \ | |
1843 | *ptr != 0; \ | |
1844 | ptr++) \ | |
1845 | { \ | |
1846 | len++; \ | |
1847 | } \ | |
1848 | \ | |
1849 | return (len * ((_utf_width) / 8)); \ | |
1850 | } | |
1851 | ||
1852 | UTF_STRLEN_FUNCTION (8) | |
1853 | ||
1854 | ||
1855 | /* Return the length (in bytes) of STR, a UTF-(UTF_WIDTH) encoded string. */ | |
1856 | #define UTF_STRLEN(_utf_width, _str) \ | |
1857 | utf ## _utf_width ## _strlen (_str) | |
1858 | ||
1859 | /* Return the "portable" name of the UTF encoding of size UTF_WIDTH and | |
1860 | ENDIANNESS (Gnulib's `iconv_open' module guarantees the portability of the | |
1861 | encoding name). */ | |
1862 | static inline void | |
1863 | utf_encoding_name (char *name, size_t utf_width, SCM endianness) | |
1864 | { | |
1865 | strcpy (name, "UTF-"); | |
1866 | strcat (name, ((utf_width == 8) | |
1867 | ? "8" | |
1868 | : ((utf_width == 16) | |
1869 | ? "16" | |
1870 | : ((utf_width == 32) | |
1871 | ? "32" | |
1872 | : "??")))); | |
1873 | strcat (name, | |
1874 | ((scm_is_eq (endianness, scm_sym_big)) | |
1875 | ? "BE" | |
1876 | : ((scm_is_eq (endianness, scm_sym_little)) | |
1877 | ? "LE" | |
1878 | : "unknown"))); | |
1879 | } | |
1880 | ||
1881 | /* Maximum length of a UTF encoding name. */ | |
1882 | #define MAX_UTF_ENCODING_NAME_LEN 16 | |
1883 | ||
1884 | /* Produce the body of a `string->utf' function. */ | |
3a5bc4fa MG |
1885 | #define STRING_TO_UTF(_utf_width) \ |
1886 | SCM utf; \ | |
1887 | int err; \ | |
1888 | char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \ | |
1889 | char *c_utf = NULL; \ | |
1890 | size_t c_strlen, c_utf_len = 0; \ | |
1891 | \ | |
1892 | SCM_VALIDATE_STRING (1, str); \ | |
1893 | if (endianness == SCM_UNDEFINED) \ | |
1894 | endianness = scm_sym_big; \ | |
1895 | else \ | |
1896 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
1897 | \ | |
1898 | utf_encoding_name (c_utf_name, (_utf_width), endianness); \ | |
1899 | \ | |
1900 | c_strlen = scm_i_string_length (str); \ | |
1901 | if (scm_i_is_narrow_string (str)) \ | |
1902 | { \ | |
1903 | err = mem_iconveh (scm_i_string_chars (str), c_strlen, \ | |
1904 | "ISO-8859-1", c_utf_name, \ | |
1905 | iconveh_question_mark, NULL, \ | |
1906 | &c_utf, &c_utf_len); \ | |
1907 | if (SCM_UNLIKELY (err)) \ | |
1908 | scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \ | |
1909 | scm_list_1 (str), err); \ | |
1910 | } \ | |
1911 | else \ | |
1912 | { \ | |
1913 | const scm_t_wchar *wbuf = scm_i_string_wide_chars (str); \ | |
1914 | c_utf = u32_conv_to_encoding (c_utf_name, \ | |
1915 | iconveh_question_mark, \ | |
1916 | (scm_t_uint32 *) wbuf, \ | |
1917 | c_strlen, NULL, NULL, &c_utf_len); \ | |
1918 | if (SCM_UNLIKELY (c_utf == NULL)) \ | |
1919 | scm_syserror_msg (FUNC_NAME, "failed to convert string: ~A", \ | |
1920 | scm_list_1 (str), errno); \ | |
1921 | } \ | |
1922 | scm_dynwind_begin (0); \ | |
1923 | scm_dynwind_free (c_utf); \ | |
1924 | utf = make_bytevector (c_utf_len, SCM_ARRAY_ELEMENT_TYPE_VU8); \ | |
1925 | memcpy (SCM_BYTEVECTOR_CONTENTS (utf), c_utf, c_utf_len); \ | |
1926 | scm_dynwind_end (); \ | |
1927 | \ | |
1928 | return (utf); | |
1ee2c72e LC |
1929 | |
1930 | ||
1931 | ||
1932 | SCM_DEFINE (scm_string_to_utf8, "string->utf8", | |
1933 | 1, 0, 0, | |
1934 | (SCM str), | |
1935 | "Return a newly allocated bytevector that contains the UTF-8 " | |
1936 | "encoding of @var{str}.") | |
1937 | #define FUNC_NAME s_scm_string_to_utf8 | |
1938 | { | |
1939 | SCM utf; | |
1ee2c72e | 1940 | uint8_t *c_utf; |
3a5bc4fa | 1941 | size_t c_strlen, c_utf_len = 0; |
1ee2c72e LC |
1942 | |
1943 | SCM_VALIDATE_STRING (1, str); | |
1944 | ||
3a5bc4fa MG |
1945 | c_strlen = scm_i_string_length (str); |
1946 | if (scm_i_is_narrow_string (str)) | |
1947 | c_utf = u8_conv_from_encoding ("ISO-8859-1", iconveh_question_mark, | |
1948 | scm_i_string_chars (str), c_strlen, | |
1949 | NULL, NULL, &c_utf_len); | |
1950 | else | |
1ee2c72e | 1951 | { |
3a5bc4fa MG |
1952 | const scm_t_wchar *wbuf = scm_i_string_wide_chars (str); |
1953 | c_utf = u32_to_u8 ((const uint32_t *) wbuf, c_strlen, NULL, &c_utf_len); | |
1ee2c72e | 1954 | } |
1ee2c72e LC |
1955 | if (SCM_UNLIKELY (c_utf == NULL)) |
1956 | scm_syserror (FUNC_NAME); | |
1957 | else | |
1ac8a47f | 1958 | { |
1ac8a47f LC |
1959 | scm_dynwind_begin (0); |
1960 | scm_dynwind_free (c_utf); | |
1961 | ||
3a5bc4fa MG |
1962 | utf = make_bytevector (c_utf_len, SCM_ARRAY_ELEMENT_TYPE_VU8); |
1963 | memcpy (SCM_BYTEVECTOR_CONTENTS (utf), c_utf, c_utf_len); | |
1ac8a47f LC |
1964 | |
1965 | scm_dynwind_end (); | |
1966 | } | |
1ee2c72e LC |
1967 | |
1968 | return (utf); | |
1969 | } | |
1970 | #undef FUNC_NAME | |
1971 | ||
1972 | SCM_DEFINE (scm_string_to_utf16, "string->utf16", | |
1973 | 1, 1, 0, | |
1974 | (SCM str, SCM endianness), | |
1975 | "Return a newly allocated bytevector that contains the UTF-16 " | |
1976 | "encoding of @var{str}.") | |
1977 | #define FUNC_NAME s_scm_string_to_utf16 | |
1978 | { | |
1979 | STRING_TO_UTF (16); | |
1980 | } | |
1981 | #undef FUNC_NAME | |
1982 | ||
1983 | SCM_DEFINE (scm_string_to_utf32, "string->utf32", | |
1984 | 1, 1, 0, | |
1985 | (SCM str, SCM endianness), | |
1986 | "Return a newly allocated bytevector that contains the UTF-32 " | |
1987 | "encoding of @var{str}.") | |
1988 | #define FUNC_NAME s_scm_string_to_utf32 | |
1989 | { | |
1990 | STRING_TO_UTF (32); | |
1991 | } | |
1992 | #undef FUNC_NAME | |
1993 | ||
1994 | ||
1995 | /* Produce the body of a function that converts a UTF-encoded bytevector to a | |
1996 | string. */ | |
1997 | #define UTF_TO_STRING(_utf_width) \ | |
1998 | SCM str = SCM_BOOL_F; \ | |
1999 | int err; \ | |
3a5bc4fa | 2000 | char *c_str = NULL; \ |
1ee2c72e | 2001 | char c_utf_name[MAX_UTF_ENCODING_NAME_LEN]; \ |
3a5bc4fa MG |
2002 | char *c_utf; \ |
2003 | size_t c_strlen = 0, c_utf_len = 0; \ | |
1ee2c72e LC |
2004 | \ |
2005 | SCM_VALIDATE_BYTEVECTOR (1, utf); \ | |
2006 | if (endianness == SCM_UNDEFINED) \ | |
2007 | endianness = scm_sym_big; \ | |
2008 | else \ | |
2009 | SCM_VALIDATE_SYMBOL (2, endianness); \ | |
2010 | \ | |
2011 | c_utf_len = SCM_BYTEVECTOR_LENGTH (utf); \ | |
2012 | c_utf = (char *) SCM_BYTEVECTOR_CONTENTS (utf); \ | |
2013 | utf_encoding_name (c_utf_name, (_utf_width), endianness); \ | |
2014 | \ | |
1ee2c72e | 2015 | err = mem_iconveh (c_utf, c_utf_len, \ |
3a5bc4fa | 2016 | c_utf_name, "UTF-8", \ |
1ee2c72e LC |
2017 | iconveh_question_mark, NULL, \ |
2018 | &c_str, &c_strlen); \ | |
2019 | if (SCM_UNLIKELY (err)) \ | |
2020 | scm_syserror_msg (FUNC_NAME, "failed to convert to string: ~A", \ | |
2021 | scm_list_1 (utf), err); \ | |
2022 | else \ | |
3a5bc4fa MG |
2023 | { \ |
2024 | str = scm_from_stringn (c_str, c_strlen, "UTF-8", \ | |
2025 | SCM_FAILED_CONVERSION_ERROR); \ | |
2026 | free (c_str); \ | |
2027 | } \ | |
1ee2c72e LC |
2028 | return (str); |
2029 | ||
2030 | ||
2031 | SCM_DEFINE (scm_utf8_to_string, "utf8->string", | |
2032 | 1, 0, 0, | |
2033 | (SCM utf), | |
2034 | "Return a newly allocate string that contains from the UTF-8-" | |
2035 | "encoded contents of bytevector @var{utf}.") | |
2036 | #define FUNC_NAME s_scm_utf8_to_string | |
2037 | { | |
2038 | SCM str; | |
1ee2c72e | 2039 | const char *c_utf; |
3a5bc4fa | 2040 | size_t c_utf_len = 0; |
1ee2c72e LC |
2041 | |
2042 | SCM_VALIDATE_BYTEVECTOR (1, utf); | |
2043 | ||
2044 | c_utf_len = SCM_BYTEVECTOR_LENGTH (utf); | |
1ee2c72e | 2045 | c_utf = (char *) SCM_BYTEVECTOR_CONTENTS (utf); |
3a5bc4fa MG |
2046 | str = scm_from_stringn (c_utf, c_utf_len, "UTF-8", |
2047 | SCM_FAILED_CONVERSION_ERROR); | |
1ee2c72e LC |
2048 | |
2049 | return (str); | |
2050 | } | |
2051 | #undef FUNC_NAME | |
2052 | ||
2053 | SCM_DEFINE (scm_utf16_to_string, "utf16->string", | |
2054 | 1, 1, 0, | |
2055 | (SCM utf, SCM endianness), | |
2056 | "Return a newly allocate string that contains from the UTF-16-" | |
2057 | "encoded contents of bytevector @var{utf}.") | |
2058 | #define FUNC_NAME s_scm_utf16_to_string | |
2059 | { | |
2060 | UTF_TO_STRING (16); | |
2061 | } | |
2062 | #undef FUNC_NAME | |
2063 | ||
2064 | SCM_DEFINE (scm_utf32_to_string, "utf32->string", | |
2065 | 1, 1, 0, | |
2066 | (SCM utf, SCM endianness), | |
2067 | "Return a newly allocate string that contains from the UTF-32-" | |
2068 | "encoded contents of bytevector @var{utf}.") | |
2069 | #define FUNC_NAME s_scm_utf32_to_string | |
2070 | { | |
2071 | UTF_TO_STRING (32); | |
2072 | } | |
2073 | #undef FUNC_NAME | |
2074 | ||
1ee2c72e | 2075 | \f |
2a610be5 AW |
2076 | /* Bytevectors as generalized vectors & arrays. */ |
2077 | ||
e286c973 AW |
2078 | |
2079 | static SCM | |
2080 | bytevector_ref_c32 (SCM bv, SCM idx) | |
2081 | { /* FIXME add some checks */ | |
2082 | const float *contents = (const float*)SCM_BYTEVECTOR_CONTENTS (bv); | |
2083 | size_t i = scm_to_size_t (idx); | |
2084 | return scm_c_make_rectangular (contents[i/8], contents[i/8 + 1]); | |
2085 | } | |
2086 | ||
2087 | static SCM | |
2088 | bytevector_ref_c64 (SCM bv, SCM idx) | |
2089 | { /* FIXME add some checks */ | |
2090 | const double *contents = (const double*)SCM_BYTEVECTOR_CONTENTS (bv); | |
2091 | size_t i = scm_to_size_t (idx); | |
2092 | return scm_c_make_rectangular (contents[i/16], contents[i/16 + 1]); | |
2093 | } | |
2094 | ||
2095 | typedef SCM (*scm_t_bytevector_ref_fn)(SCM, SCM); | |
2096 | ||
2097 | const scm_t_bytevector_ref_fn bytevector_ref_fns[SCM_ARRAY_ELEMENT_TYPE_LAST + 1] = | |
2098 | { | |
2099 | NULL, /* SCM */ | |
2100 | NULL, /* CHAR */ | |
2101 | NULL, /* BIT */ | |
2102 | scm_bytevector_u8_ref, /* VU8 */ | |
2103 | scm_bytevector_u8_ref, /* U8 */ | |
2104 | scm_bytevector_s8_ref, | |
2105 | scm_bytevector_u16_native_ref, | |
2106 | scm_bytevector_s16_native_ref, | |
2107 | scm_bytevector_u32_native_ref, | |
2108 | scm_bytevector_s32_native_ref, | |
2109 | scm_bytevector_u64_native_ref, | |
2110 | scm_bytevector_s64_native_ref, | |
2111 | scm_bytevector_ieee_single_native_ref, | |
2112 | scm_bytevector_ieee_double_native_ref, | |
2113 | bytevector_ref_c32, | |
2114 | bytevector_ref_c64 | |
2115 | }; | |
2116 | ||
2a610be5 AW |
2117 | static SCM |
2118 | bv_handle_ref (scm_t_array_handle *h, size_t index) | |
2119 | { | |
e286c973 AW |
2120 | SCM byte_index; |
2121 | scm_t_bytevector_ref_fn ref_fn; | |
2122 | ||
2123 | ref_fn = bytevector_ref_fns[h->element_type]; | |
2124 | byte_index = | |
2125 | scm_from_size_t (index * scm_array_handle_uniform_element_size (h)); | |
2126 | return ref_fn (h->array, byte_index); | |
2127 | } | |
2128 | ||
2129 | static SCM | |
2130 | bytevector_set_c32 (SCM bv, SCM idx, SCM val) | |
2131 | { /* checks are unnecessary here */ | |
2132 | float *contents = (float*)SCM_BYTEVECTOR_CONTENTS (bv); | |
2133 | size_t i = scm_to_size_t (idx); | |
2134 | contents[i/8] = scm_c_real_part (val); | |
2135 | contents[i/8 + 1] = scm_c_imag_part (val); | |
2136 | return SCM_UNSPECIFIED; | |
2a610be5 AW |
2137 | } |
2138 | ||
e286c973 AW |
2139 | static SCM |
2140 | bytevector_set_c64 (SCM bv, SCM idx, SCM val) | |
2141 | { /* checks are unnecessary here */ | |
2142 | double *contents = (double*)SCM_BYTEVECTOR_CONTENTS (bv); | |
2143 | size_t i = scm_to_size_t (idx); | |
2144 | contents[i/16] = scm_c_real_part (val); | |
2145 | contents[i/16 + 1] = scm_c_imag_part (val); | |
2146 | return SCM_UNSPECIFIED; | |
2147 | } | |
2148 | ||
2149 | typedef SCM (*scm_t_bytevector_set_fn)(SCM, SCM, SCM); | |
2150 | ||
2151 | const scm_t_bytevector_set_fn bytevector_set_fns[SCM_ARRAY_ELEMENT_TYPE_LAST + 1] = | |
2152 | { | |
2153 | NULL, /* SCM */ | |
2154 | NULL, /* CHAR */ | |
2155 | NULL, /* BIT */ | |
2156 | scm_bytevector_u8_set_x, /* VU8 */ | |
2157 | scm_bytevector_u8_set_x, /* U8 */ | |
2158 | scm_bytevector_s8_set_x, | |
2159 | scm_bytevector_u16_native_set_x, | |
2160 | scm_bytevector_s16_native_set_x, | |
2161 | scm_bytevector_u32_native_set_x, | |
2162 | scm_bytevector_s32_native_set_x, | |
2163 | scm_bytevector_u64_native_set_x, | |
2164 | scm_bytevector_s64_native_set_x, | |
2165 | scm_bytevector_ieee_single_native_set_x, | |
2166 | scm_bytevector_ieee_double_native_set_x, | |
2167 | bytevector_set_c32, | |
2168 | bytevector_set_c64 | |
2169 | }; | |
2170 | ||
2a610be5 AW |
2171 | static void |
2172 | bv_handle_set_x (scm_t_array_handle *h, size_t index, SCM val) | |
2173 | { | |
e286c973 AW |
2174 | SCM byte_index; |
2175 | scm_t_bytevector_set_fn set_fn; | |
2176 | ||
2177 | set_fn = bytevector_set_fns[h->element_type]; | |
2178 | byte_index = | |
2179 | scm_from_size_t (index * scm_array_handle_uniform_element_size (h)); | |
2180 | set_fn (h->array, byte_index, val); | |
2a610be5 AW |
2181 | } |
2182 | ||
2183 | static void | |
2184 | bytevector_get_handle (SCM v, scm_t_array_handle *h) | |
2185 | { | |
2186 | h->array = v; | |
2187 | h->ndims = 1; | |
2188 | h->dims = &h->dim0; | |
2189 | h->dim0.lbnd = 0; | |
e286c973 | 2190 | h->dim0.ubnd = SCM_BYTEVECTOR_TYPED_LENGTH (v) - 1; |
2a610be5 | 2191 | h->dim0.inc = 1; |
e286c973 | 2192 | h->element_type = SCM_BYTEVECTOR_ELEMENT_TYPE (v); |
2a610be5 AW |
2193 | h->elements = h->writable_elements = SCM_BYTEVECTOR_CONTENTS (v); |
2194 | } | |
2195 | ||
2196 | \f | |
1ee2c72e LC |
2197 | /* Initialization. */ |
2198 | ||
cfb4702f LC |
2199 | void |
2200 | scm_bootstrap_bytevectors (void) | |
2201 | { | |
807e5a66 LC |
2202 | /* This must be instantiated here because the generalized-vector API may |
2203 | want to access bytevectors even though `(rnrs bytevector)' hasn't been | |
2204 | loaded. */ | |
cfb4702f | 2205 | scm_null_bytevector = |
0665b3ff | 2206 | scm_gc_protect_object (make_bytevector (0, SCM_ARRAY_ELEMENT_TYPE_VU8)); |
cfb4702f | 2207 | |
caa92f5e | 2208 | #ifdef WORDS_BIGENDIAN |
f39448c5 | 2209 | scm_i_native_endianness = scm_from_locale_symbol ("big"); |
caa92f5e | 2210 | #else |
f39448c5 | 2211 | scm_i_native_endianness = scm_from_locale_symbol ("little"); |
caa92f5e AW |
2212 | #endif |
2213 | ||
cfb4702f LC |
2214 | scm_c_register_extension ("libguile", "scm_init_bytevectors", |
2215 | (scm_t_extension_init_func) scm_init_bytevectors, | |
2216 | NULL); | |
2a610be5 AW |
2217 | |
2218 | { | |
2219 | scm_t_array_implementation impl; | |
807e5a66 LC |
2220 | |
2221 | impl.tag = scm_tc7_bytevector; | |
2222 | impl.mask = 0x7f; | |
2a610be5 AW |
2223 | impl.vref = bv_handle_ref; |
2224 | impl.vset = bv_handle_set_x; | |
2225 | impl.get_handle = bytevector_get_handle; | |
2226 | scm_i_register_array_implementation (&impl); | |
f45eccff AW |
2227 | scm_i_register_vector_constructor |
2228 | (scm_i_array_element_types[SCM_ARRAY_ELEMENT_TYPE_VU8], | |
2229 | scm_make_bytevector); | |
2a610be5 | 2230 | } |
cfb4702f LC |
2231 | } |
2232 | ||
1ee2c72e LC |
2233 | void |
2234 | scm_init_bytevectors (void) | |
2235 | { | |
2236 | #include "libguile/bytevectors.x" | |
2237 | ||
1ee2c72e LC |
2238 | scm_endianness_big = scm_sym_big; |
2239 | scm_endianness_little = scm_sym_little; | |
1ee2c72e | 2240 | } |