Line data Source code
1 : /*
2 : *
3 : * Copyright (c) 2020 Project CHIP Authors
4 : * Copyright (c) 2013-2017 Nest Labs, Inc.
5 : *
6 : * Licensed under the Apache License, Version 2.0 (the "License");
7 : * you may not use this file except in compliance with the License.
8 : * You may obtain a copy of the License at
9 : *
10 : * http://www.apache.org/licenses/LICENSE-2.0
11 : *
12 : * Unless required by applicable law or agreed to in writing, software
13 : * distributed under the License is distributed on an "AS IS" BASIS,
14 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 : * See the License for the specific language governing permissions and
16 : * limitations under the License.
17 : */
18 :
19 : /**
20 : * @file
21 : * This file provides functions for:
22 : *
23 : * <ul>
24 : * <li>Performing byte reordering by value for 16-, 32-, and 64-bit
25 : * types.</li>
26 : * <li>Safely performing simple, efficient memory-mapped
27 : * accesses, potentially to unaligned memory locations, with or
28 : * without byte reordering, to 8-, 16-, 32-, and 64-bit
29 : * quantities, both with and without pointer management.</li>
30 : * </ul>
31 : *
32 : */
33 :
34 : #pragma once
35 :
36 : // The nlio headers use [inout] instead of [in,out], which makes the clang
37 : // documentation warning unhappy. Suppress it for those headers.
38 : #pragma GCC diagnostic push
39 : #ifdef __clang__
40 : #pragma GCC diagnostic ignored "-Wdocumentation"
41 : #endif // __clang__
42 :
43 : #include <nlbyteorder.hpp>
44 : #include <nlio-byteorder.hpp>
45 : #include <nlio.hpp>
46 :
47 : #pragma GCC diagnostic pop
48 :
49 : #include <stdint.h>
50 :
51 : namespace chip {
52 :
53 : /**
54 : * @namespace chip::Encoding
55 : *
56 : * This namespace provides functions for:
57 : *
58 : * <ul>
59 : * <li>Performing byte reordering by value for 16-, 32-, and 64-bit
60 : * types.</li>
61 : * <li>Safely performing simple, efficient memory-mapped
62 : * accesses, potentially to unaligned memory locations, with or
63 : * without byte reordering, to 8-, 16-, 32-, and 64-bit
64 : * quantities, both with and without pointer management.</li>
65 : * </ul>
66 : *
67 : */
68 : namespace Encoding {
69 :
70 : /**
71 : * This unconditionally performs a byte order swap by value of the
72 : * specified 16-bit value.
73 : *
74 : * @param[in] v The 16-bit value to be byte order swapped.
75 : *
76 : * @return The input value, byte order swapped.
77 : */
78 : inline uint16_t Swap16(uint16_t v)
79 : {
80 : return nl::ByteOrder::Swap16(v);
81 : }
82 :
83 : /**
84 : * This unconditionally performs a byte order swap by value of the
85 : * specified 32-bit value.
86 : *
87 : * @param[in] v The 32-bit value to be byte order swapped.
88 : *
89 : * @return The input value, byte order swapped.
90 : */
91 : inline uint32_t Swap32(uint32_t v)
92 : {
93 : return nl::ByteOrder::Swap32(v);
94 : }
95 :
96 : /**
97 : * This unconditionally performs a byte order swap by value of the
98 : * specified 64-bit value.
99 : *
100 : * @param[in] v The 64-bit value to be byte order swapped.
101 : *
102 : * @return The input value, byte order swapped.
103 : */
104 : inline uint64_t Swap64(uint64_t v)
105 : {
106 : return nl::ByteOrder::Swap64(v);
107 : }
108 :
109 : /**
110 : * Perform a, potentially unaligned, memory read of the 8-bit value
111 : * from the specified pointer address.
112 : *
113 : * @param[in] p A pointer address, potentially unaligned, to read
114 : * the 8-bit value from.
115 : *
116 : * @return The 8-bit value at the specified pointer address.
117 : */
118 : inline uint8_t Get8(const uint8_t * p)
119 : {
120 : return nl::IO::Get8(p);
121 : }
122 :
123 : /**
124 : * Perform a, potentially unaligned, memory write of the target system
125 : * byte ordered 8-bit value to the specified pointer address.
126 : *
127 : * @param[in] p A pointer address, potentially unaligned, to write
128 : * the 8-bit value to.
129 : *
130 : * @param[in] v The 8-bit value to write.
131 : *
132 : */
133 : inline void Put8(uint8_t * p, uint8_t v)
134 : {
135 : nl::IO::Put8(p, v);
136 : }
137 :
138 : /**
139 : * Perform a, potentially unaligned, memory read of the 8-bit value
140 : * from the specified pointer address and increment the pointer by
141 : * 8-bits (1 byte).
142 : *
143 : * @param[in,out] p A reference to a constant pointer address,
144 : * potentially unaligned, to read the 8-bit value
145 : * from and to then increment by 8-bits (1 byte).
146 : *
147 : * @return The 8-bit value at the specified pointer address.
148 : */
149 3613415 : inline uint8_t Read8(const uint8_t *& p)
150 : {
151 3613415 : return nl::IO::Read8(reinterpret_cast<const void *&>(p));
152 : }
153 :
154 : /**
155 : * Perform a, potentially unaligned, memory read of the 8-bit value
156 : * from the specified pointer address and increment the pointer by
157 : * 8-bits (1 byte).
158 : *
159 : * @param[in,out] p A reference to a pointer address, potentially
160 : * unaligned, to read the 8-bit value from and to
161 : * then increment by 8-bits (1 byte).
162 : *
163 : * @return The 8-bit value at the specified pointer address.
164 : */
165 : inline uint8_t Read8(uint8_t *& p)
166 : {
167 : return Read8(const_cast<const uint8_t *&>(p));
168 : }
169 :
170 : /**
171 : * Perform a, potentially unaligned, memory write of the 8-bit value
172 : * to the specified pointer address and increment the pointer by
173 : * 8-bits (1 byte).
174 : *
175 : * @param[in,out] p A reference to a pointer address, potentially
176 : * unaligned, to read the 8-bit value from and to
177 : * then increment by 8-bits (1 byte).
178 : *
179 : * @param[in] v The 8-bit value to write.
180 : *
181 : */
182 78161 : inline void Write8(uint8_t *& p, uint8_t v)
183 : {
184 78161 : *p++ = v;
185 78161 : }
186 :
187 : /**
188 : * @namespace chip::Encoding::LittleEndian
189 : *
190 : * This namespace provides functions for:
191 : *
192 : * <ul>
193 : * <li>Performing byte reordering, relative to the host system, by
194 : * value of little endian byte ordered values for 16-, 32-, and
195 : * 64-bit types.</li>
196 : * <li>Safely performing simple, efficient memory-mapped accesses,
197 : * potentially to unaligned memory locations, with or without byte
198 : * reordering, to 8-, 16-, 32-, and 64-bit little endian byte
199 : * ordered quantities, both with and without pointer
200 : * management.</li>
201 : * </ul>
202 : *
203 : * On little endian host systems no actual byte reordering will
204 : * occur. On other systems, byte reordering is performed as
205 : * appropriate.
206 : *
207 : */
208 : namespace LittleEndian {
209 :
210 : /**
211 : * This conditionally performs, as necessary for the target system, a
212 : * byte order swap by value of the specified value, presumed to be in
213 : * little endian byte ordering to the target system (i.e. host)
214 : * byte ordering.
215 : */
216 : template <typename T>
217 : inline T HostSwap(T v);
218 :
219 : // For completeness of the set, we have identity.
220 : template <>
221 99138 : inline uint8_t HostSwap<uint8_t>(uint8_t v)
222 : {
223 99138 : return v;
224 : }
225 :
226 : /**
227 : * This conditionally performs, as necessary for the target system, a
228 : * byte order swap by value of the specified 16-bit value, presumed to
229 : * be in little endian byte ordering to the target system (i.e. host)
230 : * byte ordering.
231 : *
232 : * Consequently, on little endian target systems, this is a no-op and
233 : * on big endian target systems, this performs a reordering.
234 : *
235 : * @param[in] v The 16-bit value to be byte order swapped.
236 : *
237 : * @return The input value, if necessary, byte order swapped.
238 : */
239 55397 : inline uint16_t HostSwap16(uint16_t v)
240 : {
241 55397 : return nl::ByteOrder::Swap16LittleToHost(v);
242 : }
243 :
244 : template <>
245 55397 : inline uint16_t HostSwap<uint16_t>(uint16_t v)
246 : {
247 55397 : return HostSwap16(v);
248 : }
249 :
250 : /**
251 : * This conditionally performs, as necessary for the target system, a
252 : * byte order swap by value of the specified 32-bit value, presumed to
253 : * be in little endian byte ordering to the target system (i.e. host)
254 : * byte ordering.
255 : *
256 : * Consequently, on little endian target systems, this is a no-op and
257 : * on big endian target systems, this performs a reordering.
258 : *
259 : * @param[in] v The 32-bit value to be byte order swapped.
260 : *
261 : * @return The input value, if necessary, byte order swapped.
262 : */
263 34081 : inline uint32_t HostSwap32(uint32_t v)
264 : {
265 34081 : return nl::ByteOrder::Swap32LittleToHost(v);
266 : }
267 :
268 : template <>
269 34081 : inline uint32_t HostSwap<uint32_t>(uint32_t v)
270 : {
271 34081 : return HostSwap32(v);
272 : }
273 :
274 : /**
275 : * This conditionally performs, as necessary for the target system, a
276 : * byte order swap by value of the specified 64-bit value, presumed to
277 : * be in little endian byte ordering to the target system (i.e. host)
278 : * byte ordering.
279 : *
280 : * Consequently, on little endian target systems, this is a no-op and
281 : * on big endian target systems, this performs a reordering.
282 : *
283 : * @param[in] v The 64-bit value to be byte order swapped.
284 : *
285 : * @return The input value, if necessary, byte order swapped.
286 : */
287 8815879 : inline uint64_t HostSwap64(uint64_t v)
288 : {
289 8815879 : return nl::ByteOrder::Swap64LittleToHost(v);
290 : }
291 :
292 : template <>
293 8815879 : inline uint64_t HostSwap<uint64_t>(uint64_t v)
294 : {
295 8815879 : return HostSwap64(v);
296 : }
297 :
298 : /**
299 : * Perform a, potentially unaligned, memory read of the little endian
300 : * byte ordered 16-bit value from the specified pointer address,
301 : * perform byte reordering, as necessary, for the target system to
302 : * put the value in target system byte ordering.
303 : *
304 : * @param[in] p A pointer address, potentially unaligned, to read
305 : * the 16-bit little endian byte ordered value from.
306 : *
307 : * @return The 16-bit value at the specified pointer address, if
308 : * necessary, byte reordered.
309 : */
310 0 : inline uint16_t Get16(const uint8_t * p)
311 : {
312 0 : return nl::IO::LittleEndian::GetUnaligned16(p);
313 : }
314 :
315 : /**
316 : * Perform a, potentially unaligned, memory read of the little endian
317 : * byte ordered 32-bit value from the specified pointer address,
318 : * perform byte reordering, as necessary, for the target system to
319 : * put the value in target system byte ordering.
320 : *
321 : * @param[in] p A pointer address, potentially unaligned, to read
322 : * the 32-bit little endian byte ordered value from.
323 : *
324 : * @return The 32-bit value at the specified pointer address, if
325 : * necessary, byte reordered.
326 : */
327 34 : inline uint32_t Get32(const uint8_t * p)
328 : {
329 34 : return nl::IO::LittleEndian::GetUnaligned32(p);
330 : }
331 :
332 : /**
333 : * Perform a, potentially unaligned, memory read of the little endian
334 : * byte ordered 64-bit value from the specified pointer address,
335 : * perform byte reordering, as necessary, for the target system to
336 : * put the value in target system byte ordering.
337 : *
338 : * @param[in] p A pointer address, potentially unaligned, to read
339 : * the 64-bit little endian byte ordered value from.
340 : *
341 : * @return The 64-bit value at the specified pointer address, if
342 : * necessary, byte reordered.
343 : */
344 : inline uint64_t Get64(const uint8_t * p)
345 : {
346 : return nl::IO::LittleEndian::GetUnaligned64(p);
347 : }
348 :
349 : /**
350 : * Perform a, potentially unaligned, memory write of the target system
351 : * byte ordered 16-bit value to the specified pointer address,
352 : * perform byte reordering, as necessary, for the target system to
353 : * put the value in little endian byte ordering.
354 : *
355 : * @param[in] p A pointer address, potentially unaligned, to write
356 : * the target system byte ordered 16-bit value to in little
357 : * endian byte ordering.
358 : *
359 : * @param[in] v The 16-bit value to write, if necessary, byte reordered.
360 : *
361 : */
362 13572 : inline void Put16(uint8_t * p, uint16_t v)
363 : {
364 13572 : nl::IO::LittleEndian::PutUnaligned16(p, v);
365 13572 : }
366 :
367 : /**
368 : * Perform a, potentially unaligned, memory write of the target system
369 : * byte ordered 32-bit value to the specified pointer address,
370 : * perform byte reordering, as necessary, for the target system to
371 : * put the value in little endian byte ordering.
372 : *
373 : * @param[in] p A pointer address, potentially unaligned, to write
374 : * the target system byte ordered 32-bit value to in little
375 : * endian byte ordering.
376 : *
377 : * @param[in] v The 32-bit value to write, if necessary, byte reordered.
378 : *
379 : */
380 37923 : inline void Put32(uint8_t * p, uint32_t v)
381 : {
382 37923 : nl::IO::LittleEndian::PutUnaligned32(p, v);
383 37923 : }
384 :
385 : /**
386 : * Perform a, potentially unaligned, memory write of the target system
387 : * byte ordered 64-bit value to the specified pointer address,
388 : * perform byte reordering, as necessary, for the target system to
389 : * put the value in little endian byte ordering.
390 : *
391 : * @param[in] p A pointer address, potentially unaligned, to write
392 : * the target system byte ordered 64-bit value to in little
393 : * endian byte ordering.
394 : *
395 : * @param[in] v The 64-bit value to write, if necessary, byte reordered.
396 : *
397 : */
398 152 : inline void Put64(uint8_t * p, uint64_t v)
399 : {
400 152 : nl::IO::LittleEndian::PutUnaligned64(p, v);
401 152 : }
402 :
403 : /**
404 : * Perform a, potentially unaligned, memory read of the little endian
405 : * byte ordered 16-bit value from the specified pointer address,
406 : * perform byte reordering, as necessary, for the target system to put
407 : * the value in target system byte ordering, and increment the pointer
408 : * by 16-bits (2 bytes).
409 : *
410 : * @param[in,out] p A reference to a constant pointer address, potentially
411 : * unaligned, to read the 16-bit little endian byte
412 : * ordered value from and to then increment by 16-
413 : * bits (2 bytes).
414 : *
415 : * @return The 16-bit value at the specified pointer address, if necessary,
416 : * byte order swapped.
417 : */
418 6762803 : inline uint16_t Read16(const uint8_t *& p)
419 : {
420 6762803 : return nl::IO::LittleEndian::ReadUnaligned16(reinterpret_cast<const void *&>(p));
421 : }
422 :
423 : /**
424 : * Perform a, potentially unaligned, memory read of the little endian
425 : * byte ordered 16-bit value from the specified pointer address,
426 : * perform byte reordering, as necessary, for the target system to put
427 : * the value in target system byte ordering, and increment the pointer
428 : * by 16-bits (2 bytes).
429 : *
430 : * @param[in,out] p A reference to a pointer address, potentially
431 : * unaligned, to read the 16-bit little endian byte
432 : * ordered value from and to then increment by 16-
433 : * bits (2 bytes).
434 : *
435 : * @return The 16-bit value at the specified pointer address, if necessary,
436 : * byte order swapped.
437 : */
438 : inline uint16_t Read16(uint8_t *& p)
439 : {
440 : return Read16(const_cast<const uint8_t *&>(p));
441 : }
442 :
443 : /**
444 : * Perform a, potentially unaligned, memory read of the little endian
445 : * byte ordered 32-bit value from the specified pointer address,
446 : * perform byte reordering, as necessary, for the target system to put
447 : * the value in target system byte ordering, and increment the pointer
448 : * by 32-bits (4 bytes).
449 : *
450 : * @param[in,out] p A reference to a constant pointer address, potentially
451 : * unaligned, to read the 32-bit little endian byte
452 : * ordered value from and to then increment by 32-
453 : * bits (4 bytes).
454 : *
455 : * @return The 32-bit value at the specified pointer address, if necessary,
456 : * byte order swapped.
457 : */
458 6243 : inline uint32_t Read32(const uint8_t *& p)
459 : {
460 6243 : return nl::IO::LittleEndian::ReadUnaligned32(reinterpret_cast<const void *&>(p));
461 : }
462 :
463 : /**
464 : * Perform a, potentially unaligned, memory read of the little endian
465 : * byte ordered 32-bit value from the specified pointer address,
466 : * perform byte reordering, as necessary, for the target system to put
467 : * the value in target system byte ordering, and increment the pointer
468 : * by 32-bits (4 bytes).
469 : *
470 : * @param[in,out] p A reference to a pointer address, potentially
471 : * unaligned, to read the 32-bit little endian byte
472 : * ordered value from and to then increment by 32-
473 : * bits (4 bytes).
474 : *
475 : * @return The 32-bit value at the specified pointer address, if necessary,
476 : * byte order swapped.
477 : */
478 : inline uint32_t Read32(uint8_t *& p)
479 : {
480 : return Read32(const_cast<const uint8_t *&>(p));
481 : }
482 :
483 : /**
484 : * Perform a, potentially unaligned, memory read of the little endian
485 : * byte ordered 64-bit value from the specified pointer address,
486 : * perform byte reordering, as necessary, for the target system to put
487 : * the value in target system byte ordering, and increment the pointer
488 : * by 64-bits (8 bytes).
489 : *
490 : * @param[in,out] p A reference to a constant pointer address, potentially
491 : * unaligned, to read the 64-bit little endian byte
492 : * ordered value from and to then increment by 64-
493 : * bits (8 bytes).
494 : *
495 : * @return The 64-bit value at the specified pointer address, if necessary,
496 : * byte order swapped.
497 : */
498 : inline uint64_t Read64(const uint8_t *& p)
499 : {
500 : return nl::IO::LittleEndian::ReadUnaligned64(reinterpret_cast<const void *&>(p));
501 : }
502 :
503 : /**
504 : * Perform a, potentially unaligned, memory read of the little endian
505 : * byte ordered 64-bit value from the specified pointer address,
506 : * perform byte reordering, as necessary, for the target system to put
507 : * the value in target system byte ordering, and increment the pointer
508 : * by 64-bits (8 bytes).
509 : *
510 : * @param[in,out] p A reference to a pointer address, potentially
511 : * unaligned, to read the 64-bit little endian byte
512 : * ordered value from and to then increment by 64-
513 : * bits (8 bytes).
514 : *
515 : * @return The 64-bit value at the specified pointer address, if necessary,
516 : * byte order swapped.
517 : */
518 : inline uint64_t Read64(uint8_t *& p)
519 : {
520 : return Read64(const_cast<const uint8_t *&>(p));
521 : }
522 :
523 : /**
524 : * Perform a, potentially unaligned, memory write of the target system
525 : * byte ordered 16-bit value to the specified pointer address,
526 : * perform byte reordering, as necessary, for the target system to
527 : * put the value in little endian byte ordering.
528 : *
529 : * @param[in] p A reference to a pointer address, potentially
530 : * unaligned, to write the target system byte
531 : * ordered 16-bit value to in little endian byte
532 : * ordering and to then increment by 16-bits (2
533 : * bytes).
534 : *
535 : * @param[in] v The 16-bit value to write, if necessary, byte order
536 : * swapped.
537 : *
538 : */
539 48922 : inline void Write16(uint8_t *& p, uint16_t v)
540 : {
541 48922 : Put16(p, v);
542 48922 : p += sizeof(uint16_t);
543 48922 : }
544 :
545 : /**
546 : * Perform a, potentially unaligned, memory write of the target system
547 : * byte ordered 32-bit value to the specified pointer address,
548 : * perform byte reordering, as necessary, for the target system to
549 : * put the value in little endian byte ordering.
550 : *
551 : * @param[in] p A reference to a pointer address, potentially
552 : * unaligned, to write the target system byte
553 : * ordered 32-bit value to in little endian byte
554 : * ordering and to then increment by 32-bits (4
555 : * bytes).
556 : *
557 : * @param[in] v The 32-bit value to write, if necessary, byte order
558 : * swapped.
559 : *
560 : */
561 37886 : inline void Write32(uint8_t *& p, uint32_t v)
562 : {
563 37886 : Put32(p, v);
564 37886 : p += sizeof(uint32_t);
565 37886 : }
566 :
567 : /**
568 : * Perform a, potentially unaligned, memory write of the target system
569 : * byte ordered 64-bit value to the specified pointer address,
570 : * perform byte reordering, as necessary, for the target system to
571 : * put the value in little endian byte ordering.
572 : *
573 : * @param[in] p A reference to a pointer address, potentially
574 : * unaligned, to write the target system byte
575 : * ordered 64-bit value to in little endian byte
576 : * ordering and to then increment by 64-bits (8
577 : * bytes).
578 : *
579 : * @param[in] v The 64-bit value to write, if necessary, byte order
580 : * swapped.
581 : *
582 : */
583 152 : inline void Write64(uint8_t *& p, uint64_t v)
584 : {
585 152 : Put64(p, v);
586 152 : p += sizeof(uint64_t);
587 152 : }
588 :
589 : } // namespace LittleEndian
590 :
591 : /**
592 : * @namespace chip::Encoding::BigEndian
593 : *
594 : * This namespace provides functions for:
595 : *
596 : * <ul>
597 : * <li>Performing byte reordering, relative to the host system, by
598 : * value of big endian byte ordered values for 16-, 32-, and
599 : * 64-bit types.</li>
600 : * <li>Safely performing simple, efficient memory-mapped accesses,
601 : * potentially to unaligned memory locations, with or without byte
602 : * reordering, to 8-, 16-, 32-, and 64-bit big endian byte
603 : * ordered quantities, both with and without pointer
604 : * management.</li>
605 : * </ul>
606 : *
607 : * On big endian host systems no actual byte reordering will
608 : * occur. On other systems, byte reordering is performed as
609 : * appropriate.
610 : *
611 : */
612 : namespace BigEndian {
613 :
614 : /**
615 : * This conditionally performs, as necessary for the target system, a
616 : * byte order swap by value of the specified 16-bit value, presumed to
617 : * be in big endian byte ordering to the target system (i.e. host)
618 : * byte ordering.
619 : *
620 : * Consequently, on bit endian target systems, this is a no-op and
621 : * on big endian target systems, this performs a reordering.
622 : *
623 : * @param[in] v The 16-bit value to be byte order swapped.
624 : *
625 : * @return The input value, if necessary, byte order swapped.
626 : */
627 : inline uint16_t HostSwap16(uint16_t v)
628 : {
629 : return nl::ByteOrder::Swap16BigToHost(v);
630 : }
631 :
632 : /**
633 : * This conditionally performs, as necessary for the target system, a
634 : * byte order swap by value of the specified 32-bit value, presumed to
635 : * be in big endian byte ordering to the target system (i.e. host)
636 : * byte ordering.
637 : *
638 : * Consequently, on bit endian target systems, this is a no-op and
639 : * on big endian target systems, this performs a reordering.
640 : *
641 : * @param[in] v The 32-bit value to be byte order swapped.
642 : *
643 : * @return The input value, if necessary, byte order swapped.
644 : */
645 53 : inline uint32_t HostSwap32(uint32_t v)
646 : {
647 53 : return nl::ByteOrder::Swap32BigToHost(v);
648 : }
649 :
650 : /**
651 : * This conditionally performs, as necessary for the target system, a
652 : * byte order swap by value of the specified 64-bit value, presumed to
653 : * be in big endian byte ordering to the target system (i.e. host)
654 : * byte ordering.
655 : *
656 : * Consequently, on bit endian target systems, this is a no-op and
657 : * on big endian target systems, this performs a reordering.
658 : *
659 : * @param[in] v The 64-bit value to be byte order swapped.
660 : *
661 : * @return The input value, if necessary, byte order swapped.
662 : */
663 : inline uint64_t HostSwap64(uint64_t v)
664 : {
665 : return nl::ByteOrder::Swap64BigToHost(v);
666 : }
667 :
668 : /**
669 : * Perform a, potentially unaligned, memory read of the big endian
670 : * byte ordered 16-bit value from the specified pointer address,
671 : * perform byte reordering, as necessary, for the target system to
672 : * put the value in target system byte ordering.
673 : *
674 : * @param[in] p A pointer address, potentially unaligned, to read
675 : * the 16-bit big endian byte ordered value from.
676 : *
677 : * @return The 16-bit value at the specified pointer address, if
678 : * necessary, byte reordered.
679 : */
680 2381 : inline uint16_t Get16(const uint8_t * p)
681 : {
682 2381 : return nl::IO::BigEndian::GetUnaligned16(p);
683 : }
684 :
685 : /**
686 : * Perform a, potentially unaligned, memory read of the big endian
687 : * byte ordered 32-bit value from the specified pointer address,
688 : * perform byte reordering, as necessary, for the target system to
689 : * put the value in target system byte ordering.
690 : *
691 : * @param[in] p A pointer address, potentially unaligned, to read
692 : * the 32-bit big endian byte ordered value from.
693 : *
694 : * @return The 32-bit value at the specified pointer address, if
695 : * necessary, byte reordered.
696 : */
697 28 : inline uint32_t Get32(const uint8_t * p)
698 : {
699 28 : return nl::IO::BigEndian::GetUnaligned32(p);
700 : }
701 :
702 : /**
703 : * Perform a, potentially unaligned, memory read of the big endian
704 : * byte ordered 64-bit value from the specified pointer address,
705 : * perform byte reordering, as necessary, for the target system to
706 : * put the value in target system byte ordering.
707 : *
708 : * @param[in] p A pointer address, potentially unaligned, to read
709 : * the 64-bit big endian byte ordered value from.
710 : *
711 : * @return The 64-bit value at the specified pointer address, if
712 : * necessary, byte reordered.
713 : */
714 1187 : inline uint64_t Get64(const uint8_t * p)
715 : {
716 1187 : return nl::IO::BigEndian::GetUnaligned64(p);
717 : }
718 :
719 : /**
720 : * Perform a, potentially unaligned, memory write of the target system
721 : * byte ordered 16-bit value to the specified pointer address,
722 : * perform byte reordering, as necessary, for the target system to
723 : * put the value in big endian byte ordering.
724 : *
725 : * @param[in] p A pointer address, potentially unaligned, to write
726 : * the target system byte ordered 16-bit value to in big
727 : * endian byte ordering.
728 : *
729 : * @param[in] v The 16-bit value to write, if necessary, byte order
730 : * swapped.
731 : *
732 : */
733 492 : inline void Put16(uint8_t * p, uint16_t v)
734 : {
735 492 : nl::IO::BigEndian::PutUnaligned16(p, v);
736 492 : }
737 :
738 : /**
739 : * Perform a, potentially unaligned, memory write of the target system
740 : * byte ordered 32-bit value to the specified pointer address,
741 : * perform byte reordering, as necessary, for the target system to
742 : * put the value in big endian byte ordering.
743 : *
744 : * @param[in] p A pointer address, potentially unaligned, to write
745 : * the target system byte ordered 32-bit value to in big
746 : * endian byte ordering.
747 : *
748 : * @param[in] v The 32-bit value to write, if necessary, byte order
749 : * swapped.
750 : *
751 : */
752 123 : inline void Put32(uint8_t * p, uint32_t v)
753 : {
754 123 : nl::IO::BigEndian::PutUnaligned32(p, v);
755 123 : }
756 :
757 : /**
758 : * Perform a, potentially unaligned, memory write of the target system
759 : * byte ordered 64-bit value to the specified pointer address,
760 : * perform byte reordering, as necessary, for the target system to
761 : * put the value in big endian byte ordering.
762 : *
763 : * @param[in] p A pointer address, potentially unaligned, to write
764 : * the target system byte ordered 64-bit value to in big
765 : * endian byte ordering.
766 : *
767 : * @param[in] v The 64-bit value to write, if necessary, byte order
768 : * swapped.
769 : *
770 : */
771 11705 : inline void Put64(uint8_t * p, uint64_t v)
772 : {
773 11705 : nl::IO::BigEndian::PutUnaligned64(p, v);
774 11705 : }
775 :
776 : /**
777 : * Perform a, potentially unaligned, memory read of the big endian
778 : * byte ordered 16-bit value from the specified pointer address,
779 : * perform byte reordering, as necessary, for the target system to put
780 : * the value in target system byte ordering, and increment the pointer
781 : * by 16-bits (2 bytes).
782 : *
783 : * @param[in,out] p A reference to a constant pointer address, potentially
784 : * unaligned, to read the 16-bit big endian byte
785 : * ordered value from and to then increment by 16-
786 : * bits (2 bytes).
787 : *
788 : * @return The 16-bit value at the specified pointer address, if necessary,
789 : * byte order swapped.
790 : */
791 1231 : inline uint16_t Read16(const uint8_t *& p)
792 : {
793 1231 : return nl::IO::BigEndian::ReadUnaligned16(reinterpret_cast<const void *&>(p));
794 : }
795 :
796 : /**
797 : * Perform a, potentially unaligned, memory read of the big endian
798 : * byte ordered 16-bit value from the specified pointer address,
799 : * perform byte reordering, as necessary, for the target system to put
800 : * the value in target system byte ordering, and increment the pointer
801 : * by 16-bits (2 bytes).
802 : *
803 : * @param[in,out] p A reference to a pointer address, potentially
804 : * unaligned, to read the 16-bit big endian byte
805 : * ordered value from and to then increment by 16-
806 : * bits (2 bytes).
807 : *
808 : * @return The 16-bit value at the specified pointer address, if necessary,
809 : * byte order swapped.
810 : */
811 : inline uint16_t Read16(uint8_t *& p)
812 : {
813 : return Read16(const_cast<const uint8_t *&>(p));
814 : }
815 :
816 : /**
817 : * Perform a, potentially unaligned, memory read of the big endian
818 : * byte ordered 32-bit value from the specified pointer address,
819 : * perform byte reordering, as necessary, for the target system to put
820 : * the value in target system byte ordering, and increment the pointer
821 : * by 32-bits (4 bytes).
822 : *
823 : * @param[in,out] p A reference to a constant pointer address, potentially
824 : * unaligned, to read the 32-bit big endian byte
825 : * ordered value from and to then increment by 32-
826 : * bits (4 bytes).
827 : *
828 : * @return The 32-bit value at the specified pointer address, if necessary,
829 : * byte order swapped.
830 : */
831 328 : inline uint32_t Read32(const uint8_t *& p)
832 : {
833 328 : return nl::IO::BigEndian::ReadUnaligned32(reinterpret_cast<const void *&>(p));
834 : }
835 :
836 : /**
837 : * Perform a, potentially unaligned, memory read of the big endian
838 : * byte ordered 32-bit value from the specified pointer address,
839 : * perform byte reordering, as necessary, for the target system to put
840 : * the value in target system byte ordering, and increment the pointer
841 : * by 32-bits (4 bytes).
842 : *
843 : * @param[in,out] p A reference to a pointer address, potentially
844 : * unaligned, to read the 32-bit big endian byte
845 : * ordered value from and to then increment by 32-
846 : * bits (4 bytes).
847 : *
848 : * @return The 32-bit value at the specified pointer address, if necessary,
849 : * byte order swapped.
850 : */
851 : inline uint32_t Read32(uint8_t *& p)
852 : {
853 : return Read32(const_cast<const uint8_t *&>(p));
854 : }
855 :
856 : /**
857 : * Perform a, potentially unaligned, memory read of the big endian
858 : * byte ordered 64-bit value from the specified pointer address,
859 : * perform byte reordering, as necessary, for the target system to put
860 : * the value in target system byte ordering, and increment the pointer
861 : * by 64-bits (8 bytes).
862 : *
863 : * @param[in,out] p A reference to a constant pointer address, potentially
864 : * unaligned, to read the 64-bit big endian byte
865 : * ordered value from and to then increment by 64-
866 : * bits (8 bytes).
867 : *
868 : * @return The 64-bit value at the specified pointer address, if necessary,
869 : * byte order swapped.
870 : */
871 : inline uint64_t Read64(const uint8_t *& p)
872 : {
873 : return nl::IO::BigEndian::ReadUnaligned64(reinterpret_cast<const void *&>(p));
874 : }
875 :
876 : /**
877 : * Perform a, potentially unaligned, memory read of the big endian
878 : * byte ordered 64-bit value from the specified pointer address,
879 : * perform byte reordering, as necessary, for the target system to put
880 : * the value in target system byte ordering, and increment the pointer
881 : * by 64-bits (8 bytes).
882 : *
883 : * @param[in,out] p A reference to a pointer address, potentially
884 : * unaligned, to read the 64-bit big endian byte
885 : * ordered value from and to then increment by 64-
886 : * bits (8 bytes).
887 : *
888 : * @return The 64-bit value at the specified pointer address, if necessary,
889 : * byte order swapped.
890 : */
891 : inline uint64_t Read64(uint8_t *& p)
892 : {
893 : return Read64(const_cast<const uint8_t *&>(p));
894 : }
895 :
896 : /**
897 : * Perform a, potentially unaligned, memory write of the target system
898 : * byte ordered 16-bit value to the specified pointer address,
899 : * perform byte reordering, as necessary, for the target system to
900 : * put the value in big endian byte ordering.
901 : *
902 : * @param[in] p A reference to a pointer address, potentially
903 : * unaligned, to write the target system byte
904 : * ordered 16-bit value to in big endian byte
905 : * ordering and to then increment by 16-bits (2
906 : * bytes).
907 : *
908 : * @param[in] v The 16-bit value to write, if necessary, byte order
909 : * swapped.
910 : *
911 : */
912 : inline void Write16(uint8_t *& p, uint16_t v)
913 : {
914 : Put16(p, v);
915 : p += sizeof(uint16_t);
916 : }
917 :
918 : /**
919 : * Perform a, potentially unaligned, memory write of the target system
920 : * byte ordered 32-bit value to the specified pointer address,
921 : * perform byte reordering, as necessary, for the target system to
922 : * put the value in big endian byte ordering.
923 : *
924 : * @param[in] p A reference to a pointer address, potentially
925 : * unaligned, to write the target system byte
926 : * ordered 32-bit value to in big endian byte
927 : * ordering and to then increment by 32-bits (4
928 : * bytes).
929 : *
930 : * @param[in] v The 32-bit value to write, if necessary, byte order
931 : * swapped.
932 : *
933 : */
934 : inline void Write32(uint8_t *& p, uint32_t v)
935 : {
936 : Put32(p, v);
937 : p += sizeof(uint32_t);
938 : }
939 :
940 : /**
941 : * Perform a, potentially unaligned, memory write of the target system
942 : * byte ordered 64-bit value to the specified pointer address,
943 : * perform byte reordering, as necessary, for the target system to
944 : * put the value in big endian byte ordering.
945 : *
946 : * @param[in] p A reference to a pointer address, potentially
947 : * unaligned, to write the target system byte
948 : * ordered 64-bit value to in big endian byte
949 : * ordering and to then increment by 64-bits (8
950 : * bytes).
951 : *
952 : * @param[in] v The 64-bit value to write, if necessary, byte order
953 : * swapped.
954 : *
955 : */
956 : inline void Write64(uint8_t *& p, uint64_t v)
957 : {
958 : Put64(p, v);
959 : p += sizeof(uint64_t);
960 : }
961 :
962 : } // namespace BigEndian
963 :
964 : } // namespace Encoding
965 : } // namespace chip
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