878ddf1f |
1 | /** @file\r |
2 | Wrapper functions for Base Memory Library.\r |
3 | \r |
4 | Copyright (c) 2006, Intel Corporation<BR>\r |
5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r |
8 | http://opensource.org/licenses/bsd-license.php\r |
9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
12 | \r |
13 | Module Name: MemLibWrapper.c\r |
14 | \r |
15 | The following BaseMemoryLib instances share the same version of this file:\r |
16 | \r |
17 | BaseMemoryLib\r |
18 | BaseMemoryLibMmx\r |
19 | BaseMemoryLibSse2\r |
20 | BaseMemoryLibRepStr\r |
21 | PeiMemoryLib\r |
22 | UefiMemoryLib\r |
23 | \r |
24 | **/\r |
25 | \r |
26 | /**\r |
27 | Copy Length bytes from Source to Destination.\r |
28 | \r |
29 | @param Destination Target of copy\r |
30 | @param Source Place to copy from\r |
31 | @param Length Number of bytes to copy\r |
32 | \r |
33 | @return Destination\r |
34 | \r |
35 | **/\r |
36 | VOID *\r |
37 | EFIAPI\r |
38 | InternalMemCopyMem (\r |
39 | OUT VOID *DestinationBuffer,\r |
40 | IN CONST VOID *SourceBuffer,\r |
41 | IN UINTN Length\r |
42 | );\r |
43 | \r |
44 | /**\r |
45 | Set Buffer to Value for Size bytes.\r |
46 | \r |
47 | @param Buffer Memory to set.\r |
48 | @param Size Number of bytes to set\r |
49 | @param Value Value of the set operation.\r |
50 | \r |
51 | @return Buffer\r |
52 | \r |
53 | **/\r |
54 | VOID *\r |
55 | EFIAPI\r |
56 | InternalMemSetMem (\r |
57 | OUT VOID *Buffer,\r |
58 | IN UINTN Length,\r |
59 | IN UINT8 Value\r |
60 | );\r |
61 | \r |
62 | /**\r |
63 | Fills a target buffer with a 16-bit value, and returns the target buffer.\r |
64 | \r |
65 | @param Buffer Pointer to the target buffer to fill.\r |
66 | @param Length Number of bytes in Buffer to fill.\r |
67 | @param Value Value with which to fill Length bytes of Buffer.\r |
68 | \r |
69 | @return Buffer\r |
70 | \r |
71 | **/\r |
72 | VOID *\r |
73 | EFIAPI\r |
74 | InternalMemSetMem16 (\r |
75 | OUT VOID *Buffer,\r |
76 | IN UINTN Length,\r |
77 | IN UINT16 Value\r |
78 | );\r |
79 | \r |
80 | /**\r |
81 | Fills a target buffer with a 32-bit value, and returns the target buffer.\r |
82 | \r |
83 | @param Buffer Pointer to the target buffer to fill.\r |
84 | @param Length Number of bytes in Buffer to fill.\r |
85 | @param Value Value with which to fill Length bytes of Buffer.\r |
86 | \r |
87 | @return Buffer\r |
88 | \r |
89 | **/\r |
90 | VOID *\r |
91 | EFIAPI\r |
92 | InternalMemSetMem32 (\r |
93 | OUT VOID *Buffer,\r |
94 | IN UINTN Length,\r |
95 | IN UINT32 Value\r |
96 | );\r |
97 | \r |
98 | /**\r |
99 | Fills a target buffer with a 64-bit value, and returns the target buffer.\r |
100 | \r |
101 | @param Buffer Pointer to the target buffer to fill.\r |
102 | @param Length Number of bytes in Buffer to fill.\r |
103 | @param Value Value with which to fill Length bytes of Buffer.\r |
104 | \r |
105 | @return Buffer\r |
106 | \r |
107 | **/\r |
108 | VOID *\r |
109 | EFIAPI\r |
110 | InternalMemSetMem64 (\r |
111 | OUT VOID *Buffer,\r |
112 | IN UINTN Length,\r |
113 | IN UINT64 Value\r |
114 | );\r |
115 | \r |
116 | /**\r |
117 | Set Buffer to 0 for Size bytes.\r |
118 | \r |
119 | @param Buffer Memory to set.\r |
120 | @param Size Number of bytes to set\r |
121 | \r |
122 | @return Buffer\r |
123 | \r |
124 | **/\r |
125 | VOID *\r |
126 | EFIAPI\r |
127 | InternalMemZeroMem (\r |
128 | OUT VOID *Buffer,\r |
129 | IN UINTN Length\r |
130 | );\r |
131 | \r |
132 | /**\r |
133 | Compares two memory buffers of a given length.\r |
134 | \r |
135 | @param DestinationBuffer First memory buffer\r |
136 | @param SourceBuffer Second memory buffer\r |
137 | @param Length Length of DestinationBuffer and SourceBuffer memory\r |
138 | regions to compare. Must be non-zero.\r |
139 | \r |
140 | @retval 0 if MemOne == MemTwo\r |
141 | \r |
142 | **/\r |
143 | INTN\r |
144 | EFIAPI\r |
145 | InternalMemCompareMem (\r |
146 | IN CONST VOID *DestinationBuffer,\r |
147 | IN CONST VOID *SourceBuffer,\r |
148 | IN UINTN Length\r |
149 | );\r |
150 | \r |
151 | /**\r |
152 | Scans a target buffer for an 8-bit value, and returns a pointer to the\r |
153 | matching 8-bit value in the target buffer.\r |
154 | \r |
155 | @param Buffer Pointer to the target buffer to scan.\r |
156 | @param Length Number of bytes in Buffer to scan. Must be non-zero.\r |
157 | @param Value Value to search for in the target buffer.\r |
158 | \r |
159 | @return Pointer to the first occurrence or NULL if not found.\r |
160 | \r |
161 | **/\r |
162 | CONST VOID *\r |
163 | EFIAPI\r |
164 | InternalMemScanMem8 (\r |
165 | IN CONST VOID *Buffer,\r |
166 | IN UINTN Length,\r |
167 | IN UINT8 Value\r |
168 | );\r |
169 | \r |
170 | /**\r |
171 | Scans a target buffer for a 16-bit value, and returns a pointer to the\r |
172 | matching 16-bit value in the target buffer.\r |
173 | \r |
174 | @param Buffer Pointer to the target buffer to scan.\r |
175 | @param Length Number of bytes in Buffer to scan. Must be non-zero.\r |
176 | @param Value Value to search for in the target buffer.\r |
177 | \r |
178 | @return Pointer to the first occurrence or NULL if not found.\r |
179 | \r |
180 | **/\r |
181 | CONST VOID *\r |
182 | EFIAPI\r |
183 | InternalMemScanMem16 (\r |
184 | IN CONST VOID *Buffer,\r |
185 | IN UINTN Length,\r |
186 | IN UINT16 Value\r |
187 | );\r |
188 | \r |
189 | /**\r |
190 | Scans a target buffer for a 32-bit value, and returns a pointer to the\r |
191 | matching 32-bit value in the target buffer.\r |
192 | \r |
193 | @param Buffer Pointer to the target buffer to scan.\r |
194 | @param Length Number of bytes in Buffer to scan. Must be non-zero.\r |
195 | @param Value Value to search for in the target buffer.\r |
196 | \r |
197 | @return Pointer to the first occurrence or NULL if not found.\r |
198 | \r |
199 | **/\r |
200 | CONST VOID *\r |
201 | EFIAPI\r |
202 | InternalMemScanMem32 (\r |
203 | IN CONST VOID *Buffer,\r |
204 | IN UINTN Length,\r |
205 | IN UINT32 Value\r |
206 | );\r |
207 | \r |
208 | /**\r |
209 | Scans a target buffer for a 64-bit value, and returns a pointer to the\r |
210 | matching 64-bit value in the target buffer.\r |
211 | \r |
212 | @param Buffer Pointer to the target buffer to scan.\r |
213 | @param Length Number of bytes in Buffer to scan. Must be non-zero.\r |
214 | @param Value Value to search for in the target buffer.\r |
215 | \r |
216 | @return Pointer to the first occurrence or NULL if not found.\r |
217 | \r |
218 | **/\r |
219 | CONST VOID *\r |
220 | EFIAPI\r |
221 | InternalMemScanMem64 (\r |
222 | IN CONST VOID *Buffer,\r |
223 | IN UINTN Length,\r |
224 | IN UINT64 Value\r |
225 | );\r |
226 | \r |
227 | /**\r |
228 | Copy Length bytes from Source to Destination.\r |
229 | \r |
230 | This function copies Length bytes from SourceBuffer to DestinationBuffer, and\r |
231 | returns DestinationBuffer. The implementation must be reentrant, and it must\r |
232 | handle the case where SourceBuffer overlaps DestinationBuffer.\r |
233 | \r |
234 | If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then\r |
235 | ASSERT().\r |
236 | If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().\r |
237 | \r |
238 | @param Destination Target of copy\r |
239 | @param Source Place to copy from\r |
240 | @param Length Number of bytes to copy\r |
241 | \r |
242 | @return Destination\r |
243 | \r |
244 | **/\r |
245 | VOID *\r |
246 | EFIAPI\r |
247 | CopyMem (\r |
248 | OUT VOID *Destination,\r |
249 | IN CONST VOID *Source,\r |
250 | IN UINTN Length\r |
251 | )\r |
252 | {\r |
253 | ASSERT (Length <= MAX_ADDRESS - (UINTN)Destination + 1);\r |
254 | ASSERT (Length <= MAX_ADDRESS - (UINTN)Source + 1);\r |
255 | return InternalMemCopyMem (Destination, Source, Length);\r |
256 | }\r |
257 | \r |
258 | /**\r |
259 | Set Buffer to Value for Size bytes.\r |
260 | \r |
261 | This function fills Length bytes of Buffer with Value, and returns Buffer.\r |
262 | \r |
263 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
264 | \r |
265 | @param Buffer Memory to set.\r |
266 | @param Size Number of bytes to set\r |
267 | @param Value Value of the set operation.\r |
268 | \r |
269 | @return Buffer\r |
270 | \r |
271 | **/\r |
272 | VOID *\r |
273 | EFIAPI\r |
274 | SetMem (\r |
275 | IN VOID *Buffer,\r |
276 | IN UINTN Size,\r |
277 | IN UINT8 Value\r |
278 | )\r |
279 | {\r |
280 | ASSERT (Size <= MAX_ADDRESS - (UINTN)Buffer + 1);\r |
281 | return InternalMemSetMem (Buffer, Size, Value);\r |
282 | }\r |
283 | \r |
284 | /**\r |
285 | Fills a target buffer with a 16-bit value, and returns the target buffer.\r |
286 | \r |
287 | This function fills Length bytes of Buffer with the 16-bit value specified by\r |
288 | Value, and returns Buffer. Value is repeated every 16-bits in for Length\r |
289 | bytes of Buffer.\r |
290 | \r |
291 | If Buffer is NULL and Length > 0, then ASSERT().\r |
292 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
293 | If Buffer is not aligned on a 16-bit boundary, then ASSERT().\r |
294 | If Length is not aligned on a 16-bit boundary, then ASSERT().\r |
295 | \r |
296 | @param Buffer Pointer to the target buffer to fill.\r |
297 | @param Length Number of bytes in Buffer to fill.\r |
298 | @param Value Value with which to fill Length bytes of Buffer.\r |
299 | \r |
300 | @return Buffer\r |
301 | \r |
302 | **/\r |
303 | VOID *\r |
304 | EFIAPI\r |
305 | SetMem16 (\r |
306 | OUT VOID *Buffer,\r |
307 | IN UINTN Length,\r |
308 | IN UINT16 Value\r |
309 | )\r |
310 | {\r |
311 | ASSERT (Buffer != NULL);\r |
312 | ASSERT (Length <= MAX_ADDRESS - (UINTN)Buffer + 1);\r |
313 | ASSERT ((((UINTN)Buffer) & 1) != 0);\r |
314 | ASSERT ((Length & 1) != 0);\r |
315 | \r |
316 | if ((Length /= sizeof (Value)) == 0) {\r |
317 | return Buffer;\r |
318 | }\r |
319 | return InternalMemSetMem16 (Buffer, Length, Value);\r |
320 | }\r |
321 | \r |
322 | /**\r |
323 | Fills a target buffer with a 32-bit value, and returns the target buffer.\r |
324 | \r |
325 | This function fills Length bytes of Buffer with the 32-bit value specified by\r |
326 | Value, and returns Buffer. Value is repeated every 32-bits in for Length\r |
327 | bytes of Buffer.\r |
328 | \r |
329 | If Buffer is NULL and Length > 0, then ASSERT().\r |
330 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
331 | If Buffer is not aligned on a 32-bit boundary, then ASSERT().\r |
332 | If Length is not aligned on a 32-bit boundary, then ASSERT().\r |
333 | \r |
334 | @param Buffer Pointer to the target buffer to fill.\r |
335 | @param Length Number of bytes in Buffer to fill.\r |
336 | @param Value Value with which to fill Length bytes of Buffer.\r |
337 | \r |
338 | @return Buffer\r |
339 | \r |
340 | **/\r |
341 | VOID *\r |
342 | EFIAPI\r |
343 | SetMem32 (\r |
344 | OUT VOID *Buffer,\r |
345 | IN UINTN Length,\r |
346 | IN UINT32 Value\r |
347 | )\r |
348 | {\r |
349 | ASSERT (Buffer != NULL);\r |
350 | ASSERT (Length <= MAX_ADDRESS - (UINTN)Buffer + 1);\r |
351 | ASSERT ((((UINTN)Buffer) & 1) != 0);\r |
352 | ASSERT ((Length & 1) != 0);\r |
353 | \r |
354 | if ((Length /= sizeof (Value)) == 0) {\r |
355 | return Buffer;\r |
356 | }\r |
357 | return InternalMemSetMem32 (Buffer, Length, Value);\r |
358 | }\r |
359 | \r |
360 | /**\r |
361 | Fills a target buffer with a 64-bit value, and returns the target buffer.\r |
362 | \r |
363 | This function fills Length bytes of Buffer with the 64-bit value specified by\r |
364 | Value, and returns Buffer. Value is repeated every 64-bits in for Length\r |
365 | bytes of Buffer.\r |
366 | \r |
367 | If Buffer is NULL and Length > 0, then ASSERT().\r |
368 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
369 | If Buffer is not aligned on a 64-bit boundary, then ASSERT().\r |
370 | If Length is not aligned on a 64-bit boundary, then ASSERT().\r |
371 | \r |
372 | @param Buffer Pointer to the target buffer to fill.\r |
373 | @param Length Number of bytes in Buffer to fill.\r |
374 | @param Value Value with which to fill Length bytes of Buffer.\r |
375 | \r |
376 | @return Buffer\r |
377 | \r |
378 | **/\r |
379 | VOID *\r |
380 | EFIAPI\r |
381 | SetMem64 (\r |
382 | OUT VOID *Buffer,\r |
383 | IN UINTN Length,\r |
384 | IN UINT64 Value\r |
385 | )\r |
386 | {\r |
387 | ASSERT (Buffer != NULL);\r |
388 | ASSERT (Length <= MAX_ADDRESS - (UINTN)Buffer + 1);\r |
389 | ASSERT ((((UINTN)Buffer) & 1) != 0);\r |
390 | ASSERT ((Length & 1) != 0);\r |
391 | \r |
392 | if ((Length /= sizeof (Value)) == 0) {\r |
393 | return Buffer;\r |
394 | }\r |
395 | return InternalMemSetMem64 (Buffer, Length, Value);\r |
396 | }\r |
397 | \r |
398 | /**\r |
399 | Set Buffer to 0 for Size bytes.\r |
400 | \r |
401 | This function fills Length bytes of Buffer with zeros, and returns Buffer.\r |
402 | \r |
403 | If Buffer is NULL and Length > 0, then ASSERT().\r |
404 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
405 | \r |
406 | @param Buffer Memory to set.\r |
407 | @param Size Number of bytes to set\r |
408 | \r |
409 | @return Buffer\r |
410 | \r |
411 | **/\r |
412 | VOID *\r |
413 | EFIAPI\r |
414 | ZeroMem (\r |
415 | IN VOID *Buffer,\r |
416 | IN UINTN Size\r |
417 | )\r |
418 | {\r |
419 | ASSERT (Buffer != NULL);\r |
420 | return InternalMemSetMem (Buffer, Size, 0);\r |
421 | }\r |
422 | \r |
423 | /**\r |
424 | Compares two memory buffers of a given length.\r |
425 | \r |
426 | This function compares Length bytes of SourceBuffer to Length bytes of\r |
427 | DestinationBuffer. If all Length bytes of the two buffers are identical, then\r |
428 | 0 is returned. Otherwise, the value returned is the first mismatched byte in\r |
429 | SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.\r |
430 | \r |
431 | If DestinationBuffer is NULL and Length > 0, then ASSERT().\r |
432 | If SourceBuffer is NULL and Length > 0, then ASSERT().\r |
433 | If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then\r |
434 | ASSERT().\r |
435 | If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().\r |
436 | \r |
437 | @param DestinationBuffer First memory buffer\r |
438 | @param SourceBuffer Second memory buffer\r |
439 | @param Length Length of DestinationBuffer and SourceBuffer memory\r |
440 | regions to compare\r |
441 | \r |
442 | @retval 0 if DestinationBuffer == SourceBuffer\r |
443 | @retval Non-zero if DestinationBuffer != SourceBuffer\r |
444 | \r |
445 | **/\r |
446 | INTN\r |
447 | EFIAPI\r |
448 | CompareMem (\r |
449 | IN CONST VOID *DestinationBuffer,\r |
450 | IN CONST VOID *SourceBuffer,\r |
451 | IN UINTN Length\r |
452 | )\r |
453 | {\r |
454 | ASSERT (DestinationBuffer != NULL);\r |
455 | ASSERT (SourceBuffer != NULL);\r |
456 | ASSERT (Length <= MAX_ADDRESS - (UINTN)DestinationBuffer + 1);\r |
457 | ASSERT (Length <= MAX_ADDRESS - (UINTN)SourceBuffer + 1);\r |
458 | if (Length == 0) {\r |
459 | return 0;\r |
460 | }\r |
461 | return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);\r |
462 | }\r |
463 | \r |
464 | /**\r |
465 | Scans a target buffer for an 8-bit value, and returns a pointer to the\r |
466 | matching 8-bit value in the target buffer.\r |
467 | \r |
468 | This function searches target the buffer specified by Buffer and Length from\r |
469 | the lowest address to the highest address for an 8-bit value that matches\r |
470 | Value. If a match is found, then a pointer to the matching byte in the target\r |
471 | buffer is returned. If no match is found, then NULL is returned. If Length is\r |
472 | 0, then NULL is returned.\r |
473 | \r |
474 | If Buffer is NULL, then ASSERT().\r |
475 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
476 | \r |
477 | @param Buffer Pointer to the target buffer to scan.\r |
478 | @param Length Number of bytes in Buffer to scan.\r |
479 | @param Value Value to search for in the target buffer.\r |
480 | \r |
481 | @return Pointer to the first occurrence or NULL if not found.\r |
482 | @retval NULL if Length == 0 or Value was not found.\r |
483 | \r |
484 | **/\r |
485 | VOID *\r |
486 | EFIAPI\r |
487 | ScanMem8 (\r |
488 | IN CONST VOID *Buffer,\r |
489 | IN UINTN Length,\r |
490 | IN UINT8 Value\r |
491 | )\r |
492 | {\r |
493 | ASSERT (Buffer != NULL);\r |
494 | ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);\r |
495 | \r |
496 | if ((Length /= sizeof (Value)) == 0) {\r |
497 | return NULL;\r |
498 | }\r |
499 | return (VOID*)InternalMemScanMem8 (Buffer, Length, Value);\r |
500 | }\r |
501 | \r |
502 | /**\r |
503 | Scans a target buffer for a 16-bit value, and returns a pointer to the\r |
504 | matching 16-bit value in the target buffer.\r |
505 | \r |
506 | This function searches target the buffer specified by Buffer and Length from\r |
507 | the lowest address to the highest address at 16-bit increments for a 16-bit\r |
508 | value that matches Value. If a match is found, then a pointer to the matching\r |
509 | value in the target buffer is returned. If no match is found, then NULL is\r |
510 | returned. If Length is 0, then NULL is returned.\r |
511 | \r |
512 | If Buffer is NULL, then ASSERT().\r |
513 | If Buffer is not aligned on a 16-bit boundary, then ASSERT().\r |
514 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
515 | \r |
516 | @param Buffer Pointer to the target buffer to scan.\r |
517 | @param Length Number of bytes in Buffer to scan.\r |
518 | @param Value Value to search for in the target buffer.\r |
519 | \r |
520 | @return Pointer to the first occurrence.\r |
521 | @retval NULL if Length == 0 or Value was not found.\r |
522 | \r |
523 | **/\r |
524 | VOID *\r |
525 | EFIAPI\r |
526 | ScanMem16 (\r |
527 | IN CONST VOID *Buffer,\r |
528 | IN UINTN Length,\r |
529 | IN UINT16 Value\r |
530 | )\r |
531 | {\r |
532 | ASSERT (Buffer != NULL);\r |
533 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r |
534 | ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);\r |
535 | \r |
536 | if ((Length /= sizeof (Value)) == 0) {\r |
537 | return NULL;\r |
538 | }\r |
539 | return (VOID*)InternalMemScanMem16 (Buffer, Length, Value);\r |
540 | }\r |
541 | \r |
542 | /**\r |
543 | Scans a target buffer for a 32-bit value, and returns a pointer to the\r |
544 | matching 32-bit value in the target buffer.\r |
545 | \r |
546 | This function searches target the buffer specified by Buffer and Length from\r |
547 | the lowest address to the highest address at 32-bit increments for a 32-bit\r |
548 | value that matches Value. If a match is found, then a pointer to the matching\r |
549 | value in the target buffer is returned. If no match is found, then NULL is\r |
550 | returned. If Length is 0, then NULL is returned.\r |
551 | \r |
552 | If Buffer is NULL, then ASSERT().\r |
553 | If Buffer is not aligned on a 32-bit boundary, then ASSERT().\r |
554 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
555 | \r |
556 | @param Buffer Pointer to the target buffer to scan.\r |
557 | @param Length Number of bytes in Buffer to scan.\r |
558 | @param Value Value to search for in the target buffer.\r |
559 | \r |
560 | @return Pointer to the first occurrence or NULL if not found.\r |
561 | @retval NULL if Length == 0 or Value was not found.\r |
562 | \r |
563 | **/\r |
564 | VOID *\r |
565 | EFIAPI\r |
566 | ScanMem32 (\r |
567 | IN CONST VOID *Buffer,\r |
568 | IN UINTN Length,\r |
569 | IN UINT32 Value\r |
570 | )\r |
571 | {\r |
572 | ASSERT (Buffer != NULL);\r |
573 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r |
574 | ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);\r |
575 | \r |
576 | if ((Length /= sizeof (Value)) == 0) {\r |
577 | return NULL;\r |
578 | }\r |
579 | return (VOID*)InternalMemScanMem32 (Buffer, Length, Value);\r |
580 | }\r |
581 | \r |
582 | /**\r |
583 | Scans a target buffer for a 64-bit value, and returns a pointer to the\r |
584 | matching 64-bit value in the target buffer.\r |
585 | \r |
586 | This function searches target the buffer specified by Buffer and Length from\r |
587 | the lowest address to the highest address at 64-bit increments for a 64-bit\r |
588 | value that matches Value. If a match is found, then a pointer to the matching\r |
589 | value in the target buffer is returned. If no match is found, then NULL is\r |
590 | returned. If Length is 0, then NULL is returned.\r |
591 | \r |
592 | If Buffer is NULL, then ASSERT().\r |
593 | If Buffer is not aligned on a 64-bit boundary, then ASSERT().\r |
594 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
595 | \r |
596 | @param Buffer Pointer to the target buffer to scan.\r |
597 | @param Length Number of bytes in Buffer to scan.\r |
598 | @param Value Value to search for in the target buffer.\r |
599 | \r |
600 | @return Pointer to the first occurrence or NULL if not found.\r |
601 | @retval NULL if Length == 0 or Value was not found.\r |
602 | \r |
603 | **/\r |
604 | VOID *\r |
605 | EFIAPI\r |
606 | ScanMem64 (\r |
607 | IN CONST VOID *Buffer,\r |
608 | IN UINTN Length,\r |
609 | IN UINT64 Value\r |
610 | )\r |
611 | {\r |
612 | ASSERT (Buffer != NULL);\r |
613 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r |
614 | ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);\r |
615 | \r |
616 | if ((Length /= sizeof (Value)) == 0) {\r |
617 | return NULL;\r |
618 | }\r |
619 | return (VOID*)InternalMemScanMem64 (Buffer, Length, Value);\r |
620 | }\r |