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878ddf1f | 1 | /** @file\r |
2 | Mde UEFI library functions.\r | |
3 | \r | |
ca21f1a2 | 4 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
878ddf1f | 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: UefiLib.c\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | /**\r | |
18 | Compare whether two names of languages are identical.\r | |
19 | \r | |
20 | @param Language1 Name of language 1.\r | |
21 | @param Language2 Name of language 2.\r | |
22 | \r | |
23 | @retval TRUE Language 1 and language 2 are the same.\r | |
24 | @retval FALSE Language 1 and language 2 are not the same.\r | |
25 | \r | |
26 | **/\r | |
58251024 | 27 | STATIC\r |
878ddf1f | 28 | BOOLEAN\r |
29 | CompareIso639LanguageCode (\r | |
30 | IN CONST CHAR8 *Language1,\r | |
31 | IN CONST CHAR8 *Language2\r | |
32 | )\r | |
33 | {\r | |
58251024 | 34 | UINT32 Name1;\r |
35 | UINT32 Name2;\r | |
36 | \r | |
37 | Name1 = ReadUnaligned24 ((CONST UINT32 *) Language1);\r | |
38 | Name2 = ReadUnaligned24 ((CONST UINT32 *) Language2);\r | |
39 | \r | |
40 | return (BOOLEAN) (Name1 == Name2);\r | |
878ddf1f | 41 | }\r |
42 | \r | |
43 | /**\r | |
44 | This function searches the list of configuration tables stored in the EFI System \r | |
45 | Table for a table with a GUID that matches TableGuid. If a match is found, \r | |
46 | then a pointer to the configuration table is returned in Table, and EFI_SUCCESS \r | |
47 | is returned. If a matching GUID is not found, then EFI_NOT_FOUND is returned.\r | |
48 | \r | |
49 | @param TableGuid Pointer to table's GUID type..\r | |
50 | @param Table Pointer to the table associated with TableGuid in the EFI System Table.\r | |
51 | \r | |
52 | @retval EFI_SUCCESS A configuration table matching TableGuid was found.\r | |
53 | @retval EFI_NOT_FOUND A configuration table matching TableGuid could not be found.\r | |
54 | \r | |
55 | **/\r | |
56 | EFI_STATUS\r | |
57 | EFIAPI\r | |
58 | EfiGetSystemConfigurationTable ( \r | |
59 | IN EFI_GUID *TableGuid,\r | |
60 | OUT VOID **Table\r | |
61 | )\r | |
62 | {\r | |
63 | EFI_SYSTEM_TABLE *SystemTable;\r | |
64 | UINTN Index;\r | |
65 | \r | |
66 | ASSERT (TableGuid != NULL);\r | |
67 | ASSERT (Table != NULL);\r | |
68 | \r | |
69 | SystemTable = gST;\r | |
70 | *Table = NULL;\r | |
71 | for (Index = 0; Index < SystemTable->NumberOfTableEntries; Index++) {\r | |
72 | if (CompareGuid (TableGuid, &(SystemTable->ConfigurationTable[Index].VendorGuid))) {\r | |
73 | *Table = SystemTable->ConfigurationTable[Index].VendorTable;\r | |
74 | return EFI_SUCCESS;\r | |
75 | }\r | |
76 | }\r | |
77 | \r | |
78 | return EFI_NOT_FOUND;\r | |
79 | }\r | |
80 | \r | |
81 | /**\r | |
82 | This function causes the notification function to be executed for every protocol \r | |
83 | of type ProtocolGuid instance that exists in the system when this function is \r | |
84 | invoked. In addition, every time a protocol of type ProtocolGuid instance is \r | |
85 | installed or reinstalled, the notification function is also executed.\r | |
86 | \r | |
87 | @param ProtocolGuid Supplies GUID of the protocol upon whose installation the event is fired.\r | |
88 | @param NotifyTpl Supplies the task priority level of the event notifications.\r | |
89 | @param NotifyFunction Supplies the function to notify when the event is signaled.\r | |
90 | @param NotifyContext The context parameter to pass to NotifyFunction.\r | |
91 | @param Registration A pointer to a memory location to receive the registration value.\r | |
92 | \r | |
93 | @return The notification event that was created. \r | |
94 | \r | |
95 | **/\r | |
96 | EFI_EVENT\r | |
97 | EFIAPI\r | |
98 | EfiCreateProtocolNotifyEvent(\r | |
99 | IN EFI_GUID *ProtocolGuid,\r | |
100 | IN EFI_TPL NotifyTpl,\r | |
101 | IN EFI_EVENT_NOTIFY NotifyFunction,\r | |
102 | IN VOID *NotifyContext, OPTIONAL\r | |
f2df6a00 | 103 | OUT VOID **Registration\r |
878ddf1f | 104 | )\r |
105 | {\r | |
106 | EFI_STATUS Status;\r | |
107 | EFI_EVENT Event;\r | |
108 | \r | |
109 | //\r | |
110 | // Create the event\r | |
111 | //\r | |
112 | \r | |
113 | Status = gBS->CreateEvent (\r | |
114 | EFI_EVENT_NOTIFY_SIGNAL,\r | |
115 | NotifyTpl,\r | |
116 | NotifyFunction,\r | |
117 | NotifyContext,\r | |
118 | &Event\r | |
119 | );\r | |
120 | ASSERT_EFI_ERROR (Status);\r | |
121 | \r | |
122 | //\r | |
123 | // Register for protocol notifactions on this event\r | |
124 | //\r | |
125 | \r | |
126 | Status = gBS->RegisterProtocolNotify (\r | |
127 | ProtocolGuid,\r | |
128 | Event,\r | |
129 | Registration\r | |
130 | );\r | |
131 | \r | |
132 | ASSERT_EFI_ERROR (Status);\r | |
133 | \r | |
134 | //\r | |
135 | // Kick the event so we will perform an initial pass of\r | |
136 | // current installed drivers\r | |
137 | //\r | |
138 | \r | |
139 | gBS->SignalEvent (Event);\r | |
140 | return Event;\r | |
141 | }\r | |
142 | \r | |
143 | /**\r | |
144 | This function creates an event using NotifyTpl, NoifyFunction, and NotifyContext.\r | |
145 | This event is signaled with EfiNamedEventSignal(). This provide the ability for \r | |
146 | one or more listeners on the same event named by the GUID specified by Name.\r | |
147 | \r | |
148 | @param Name Supplies GUID name of the event.\r | |
149 | @param NotifyTpl Supplies the task priority level of the event notifications.\r | |
150 | @param NotifyFunction Supplies the function to notify when the event is signaled.\r | |
151 | @param NotifyContext The context parameter to pass to NotifyFunction. \r | |
152 | @param Registration A pointer to a memory location to receive the registration value.\r | |
153 | \r | |
154 | @retval EFI_SUCCESS A named event was created.\r | |
155 | @retval EFI_OUT_OF_RESOURCES There are not enough resource to create the named event.\r | |
156 | \r | |
157 | **/\r | |
158 | EFI_STATUS\r | |
159 | EFIAPI\r | |
160 | EfiNamedEventListen (\r | |
161 | IN CONST EFI_GUID *Name,\r | |
162 | IN EFI_TPL NotifyTpl,\r | |
163 | IN EFI_EVENT_NOTIFY NotifyFunction,\r | |
164 | IN CONST VOID *NotifyContext, OPTIONAL\r | |
13c84604 | 165 | OUT VOID *Registration OPTIONAL\r |
878ddf1f | 166 | )\r |
167 | {\r | |
168 | EFI_STATUS Status;\r | |
169 | EFI_EVENT Event;\r | |
170 | VOID *RegistrationLocal;\r | |
171 | \r | |
172 | //\r | |
173 | // Create event\r | |
174 | //\r | |
175 | Status = gBS->CreateEvent (\r | |
176 | EFI_EVENT_NOTIFY_SIGNAL,\r | |
177 | NotifyTpl,\r | |
178 | NotifyFunction,\r | |
179 | (VOID *) NotifyContext,\r | |
180 | &Event\r | |
181 | );\r | |
182 | ASSERT_EFI_ERROR (Status);\r | |
183 | \r | |
184 | //\r | |
185 | // The Registration is not optional to RegisterProtocolNotify().\r | |
186 | // To make it optional to EfiNamedEventListen(), may need to substitute with a local.\r | |
187 | //\r | |
188 | if (Registration != NULL) {\r | |
189 | RegistrationLocal = Registration;\r | |
190 | } else {\r | |
191 | RegistrationLocal = &RegistrationLocal;\r | |
192 | }\r | |
193 | \r | |
194 | //\r | |
195 | // Register for an installation of protocol interface\r | |
196 | //\r | |
197 | \r | |
198 | Status = gBS->RegisterProtocolNotify (\r | |
199 | (EFI_GUID *) Name,\r | |
200 | Event,\r | |
201 | RegistrationLocal\r | |
202 | );\r | |
203 | ASSERT_EFI_ERROR (Status);\r | |
204 | \r | |
205 | return EFI_SUCCESS;\r | |
206 | }\r | |
207 | \r | |
208 | /**\r | |
209 | This function signals the named event specified by Name. The named event must \r | |
210 | have been created with EfiNamedEventListen().\r | |
211 | \r | |
212 | @param Name Supplies GUID name of the event.\r | |
213 | \r | |
214 | @retval EFI_SUCCESS A named event was signaled.\r | |
215 | @retval EFI_OUT_OF_RESOURCES There are not enough resource to signal the named event.\r | |
216 | \r | |
217 | **/\r | |
218 | EFI_STATUS\r | |
219 | EFIAPI\r | |
220 | EfiNamedEventSignal (\r | |
221 | IN CONST EFI_GUID *Name\r | |
222 | )\r | |
223 | {\r | |
224 | EFI_STATUS Status;\r | |
225 | EFI_HANDLE Handle;\r | |
226 | \r | |
227 | Handle = NULL;\r | |
228 | Status = gBS->InstallProtocolInterface (\r | |
229 | &Handle,\r | |
230 | (EFI_GUID *) Name,\r | |
231 | EFI_NATIVE_INTERFACE,\r | |
232 | NULL\r | |
233 | );\r | |
234 | ASSERT_EFI_ERROR (Status);\r | |
235 | \r | |
236 | Status = gBS->UninstallProtocolInterface (\r | |
237 | Handle,\r | |
238 | (EFI_GUID *) Name,\r | |
239 | NULL\r | |
240 | );\r | |
241 | ASSERT_EFI_ERROR (Status);\r | |
242 | \r | |
243 | return EFI_SUCCESS;\r | |
244 | }\r | |
245 | \r | |
d958721a | 246 | /** \r |
247 | Returns the current TPL.\r | |
248 | \r | |
249 | This function returns the current TPL. There is no EFI service to directly \r | |
250 | retrieve the current TPL. Instead, the RaiseTPL() function is used to raise \r | |
251 | the TPL to TPL_HIGH_LEVEL. This will return the current TPL. The TPL level \r | |
252 | can then immediately be restored back to the current TPL level with a call \r | |
253 | to RestoreTPL().\r | |
254 | \r | |
255 | @param VOID\r | |
256 | \r | |
257 | @retvale EFI_TPL The current TPL.\r | |
258 | \r | |
259 | **/\r | |
260 | EFI_TPL\r | |
261 | EFIAPI\r | |
262 | EfiGetCurrentTpl (\r | |
263 | VOID\r | |
264 | )\r | |
265 | {\r | |
266 | EFI_TPL Tpl;\r | |
267 | \r | |
268 | Tpl = gBS->RaiseTPL (EFI_TPL_HIGH_LEVEL); \r | |
269 | gBS->RestoreTPL (Tpl);\r | |
270 | \r | |
271 | return Tpl;\r | |
272 | }\r | |
273 | \r | |
878ddf1f | 274 | \r |
275 | /**\r | |
276 | This function initializes a basic mutual exclusion lock to the released state \r | |
277 | and returns the lock. Each lock provides mutual exclusion access at its task \r | |
278 | priority level. Since there is no preemption or multiprocessor support in EFI,\r | |
279 | acquiring the lock only consists of raising to the locks TPL.\r | |
280 | \r | |
281 | @param Lock A pointer to the lock data structure to initialize.\r | |
282 | @param Priority EFI TPL associated with the lock.\r | |
283 | \r | |
284 | @return The lock.\r | |
285 | \r | |
286 | **/\r | |
287 | EFI_LOCK *\r | |
288 | EFIAPI\r | |
289 | EfiInitializeLock (\r | |
290 | IN OUT EFI_LOCK *Lock,\r | |
291 | IN EFI_TPL Priority\r | |
292 | )\r | |
293 | {\r | |
294 | ASSERT (Lock != NULL);\r | |
295 | ASSERT (Priority <= EFI_TPL_HIGH_LEVEL);\r | |
296 | \r | |
297 | Lock->Tpl = Priority;\r | |
298 | Lock->OwnerTpl = EFI_TPL_APPLICATION;\r | |
299 | Lock->Lock = EfiLockReleased ;\r | |
300 | return Lock;\r | |
301 | }\r | |
302 | \r | |
303 | /**\r | |
511710d6 | 304 | This function raises the system's current task priority level to the task \r |
878ddf1f | 305 | priority level of the mutual exclusion lock. Then, it places the lock in the \r |
306 | acquired state.\r | |
307 | \r | |
308 | @param Priority The task priority level of the lock.\r | |
309 | \r | |
310 | **/\r | |
311 | VOID\r | |
312 | EFIAPI\r | |
313 | EfiAcquireLock (\r | |
314 | IN EFI_LOCK *Lock\r | |
315 | )\r | |
316 | {\r | |
317 | ASSERT (Lock != NULL);\r | |
318 | ASSERT (Lock->Lock == EfiLockReleased);\r | |
319 | \r | |
320 | Lock->OwnerTpl = gBS->RaiseTPL (Lock->Tpl);\r | |
321 | Lock->Lock = EfiLockAcquired;\r | |
322 | }\r | |
323 | \r | |
324 | /**\r | |
511710d6 | 325 | This function raises the system's current task priority level to the task \r |
878ddf1f | 326 | priority level of the mutual exclusion lock. Then, it attempts to place the \r |
327 | lock in the acquired state.\r | |
328 | \r | |
329 | @param Lock A pointer to the lock to acquire.\r | |
330 | \r | |
331 | @retval EFI_SUCCESS The lock was acquired.\r | |
332 | @retval EFI_ACCESS_DENIED The lock could not be acquired because it is already owned.\r | |
333 | \r | |
334 | **/\r | |
335 | EFI_STATUS\r | |
336 | EFIAPI\r | |
337 | EfiAcquireLockOrFail (\r | |
338 | IN EFI_LOCK *Lock\r | |
339 | )\r | |
340 | {\r | |
341 | \r | |
342 | ASSERT (Lock != NULL);\r | |
343 | ASSERT (Lock->Lock != EfiLockUninitialized);\r | |
344 | \r | |
345 | if (Lock->Lock == EfiLockAcquired) {\r | |
346 | //\r | |
347 | // Lock is already owned, so bail out\r | |
348 | //\r | |
349 | return EFI_ACCESS_DENIED;\r | |
350 | }\r | |
351 | \r | |
352 | Lock->OwnerTpl = gBS->RaiseTPL (Lock->Tpl);\r | |
353 | \r | |
354 | Lock->Lock = EfiLockAcquired;\r | |
355 | \r | |
356 | return EFI_SUCCESS;\r | |
357 | }\r | |
358 | \r | |
359 | /**\r | |
360 | This function transitions a mutual exclusion lock from the acquired state to \r | |
511710d6 | 361 | the released state, and restores the system's task priority level to its \r |
878ddf1f | 362 | previous level.\r |
363 | \r | |
364 | @param Lock A pointer to the lock to release.\r | |
365 | \r | |
366 | **/\r | |
367 | VOID\r | |
368 | EFIAPI\r | |
369 | EfiReleaseLock (\r | |
370 | IN EFI_LOCK *Lock\r | |
371 | )\r | |
372 | {\r | |
373 | EFI_TPL Tpl;\r | |
374 | \r | |
375 | ASSERT (Lock != NULL);\r | |
376 | ASSERT (Lock->Lock == EfiLockAcquired);\r | |
377 | \r | |
378 | Tpl = Lock->OwnerTpl;\r | |
379 | \r | |
380 | Lock->Lock = EfiLockReleased;\r | |
381 | \r | |
382 | gBS->RestoreTPL (Tpl);\r | |
383 | }\r | |
384 | \r | |
ca21f1a2 | 385 | /** |
386 | Tests whether a controller is managed by a specific driver. | |
387 | ||
388 | This function tests whether a specific driver manages ControllerHandle by\r | |
389 | opening on DriverBindingHandle a protocol specified by ProtocolGuid with\r | |
390 | attribute EFI_OPEN_PROTOCOL_BY_DRIVER. This library function is used to\r | |
391 | implement the Component Name Protocol for EFI Drivers.\r | |
392 | If ProtocolGuid is NULL, then ASSERT().\r | |
393 | ||
394 | @param ControllerHandle A handle for a controller to test. | |
395 | @param DriverBindingHandle Specifies the driver binding handle for the | |
396 | driver. | |
397 | @param ProtocolGuid Supplies GUID for the protocol opened by the | |
398 | driver on the controller. | |
399 | ||
400 | @retval EFI_SUCCESS ControllerHandle is managed by the specific | |
401 | driver. | |
402 | @retval EFI_UNSUPPORTED ControllerHandle is not managed by the specific | |
403 | driver. | |
404 | ||
405 | **/\r | |
406 | EFI_STATUS\r | |
407 | EFIAPI\r | |
408 | EfiTestManagedDevice (\r | |
409 | IN CONST EFI_HANDLE ControllerHandle,\r | |
410 | IN CONST EFI_HANDLE DriverBindingHandle,\r | |
411 | IN CONST EFI_GUID *ProtocolGuid\r | |
412 | )\r | |
413 | {\r | |
414 | EFI_STATUS Status;\r | |
415 | VOID *ManagedInterface;\r | |
416 | \r | |
417 | ASSERT (ProtocolGuid != NULL);\r | |
418 | \r | |
419 | Status = gBS->OpenProtocol (\r | |
420 | ControllerHandle,\r | |
421 | (EFI_GUID *) ProtocolGuid,\r | |
422 | &ManagedInterface,\r | |
423 | DriverBindingHandle,\r | |
424 | ControllerHandle,\r | |
425 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
426 | );\r | |
427 | if (!EFI_ERROR (Status)) {\r | |
428 | gBS->CloseProtocol (\r | |
429 | ControllerHandle,\r | |
430 | (EFI_GUID *) ProtocolGuid,\r | |
431 | DriverBindingHandle,\r | |
432 | ControllerHandle\r | |
433 | );\r | |
434 | return EFI_UNSUPPORTED;\r | |
435 | }\r | |
436 | \r | |
437 | if (Status != EFI_ALREADY_STARTED) {\r | |
438 | return EFI_UNSUPPORTED;\r | |
439 | }\r | |
440 | \r | |
441 | return EFI_SUCCESS;\r | |
442 | }\r | |
443 | \r | |
444 | /** | |
445 | Tests whether a child handle is a children device of the controller. | |
446 | ||
447 | This function tests whether ChildHandle is one of the children of | |
448 | ControllerHandle which are consuming a protocol specified by ProtocolGuid | |
449 | with the attribute bit EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER set. This | |
450 | library function is used to implement the Component Name Protocol for EFI | |
451 | Drivers. | |
452 | If ProtocolGuid is NULL, then ASSERT(). | |
453 | ||
454 | @param ControllerHandle A handle for a (parent) controller to test. | |
455 | @param ChildHandle A child handle to test. | |
456 | @param ConsumsedGuid Supplies GUID for the protocol consumed by | |
457 | children from controller. | |
458 | ||
459 | @retval EFI_SUCCESS ChildHandle is a child of the ControllerHandle. | |
460 | @retval EFI_UNSUPPORTED ChildHandle is not a child of the | |
461 | ControllerHandle. | |
462 | ||
463 | **/\r | |
464 | EFI_STATUS\r | |
465 | EFIAPI\r | |
466 | EfiTestChildHandle (\r | |
467 | IN CONST EFI_HANDLE ControllerHandle,\r | |
468 | IN CONST EFI_HANDLE ChildHandle,\r | |
469 | IN CONST EFI_GUID *ProtocolGuid\r | |
470 | )\r | |
471 | {\r | |
472 | EFI_STATUS Status;\r | |
473 | EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer;\r | |
474 | UINTN EntryCount;\r | |
475 | UINTN Index;\r | |
476 | \r | |
477 | ASSERT (ProtocolGuid != NULL);\r | |
478 | \r | |
479 | //\r | |
480 | // Retrieve the list of agents that are consuming the specific protocol\r | |
481 | // on ControllerHandle.\r | |
482 | //\r | |
483 | Status = gBS->OpenProtocolInformation (\r | |
484 | ControllerHandle,\r | |
485 | (EFI_GUID *) ProtocolGuid,\r | |
486 | &OpenInfoBuffer,\r | |
487 | &EntryCount\r | |
488 | );\r | |
489 | if (EFI_ERROR (Status)) {\r | |
490 | return EFI_UNSUPPORTED;\r | |
491 | }\r | |
492 | \r | |
493 | //\r | |
494 | // Inspect if ChildHandle is one of the agents.\r | |
495 | //\r | |
496 | Status = EFI_UNSUPPORTED;\r | |
497 | for (Index = 0; Index < EntryCount; Index++) {\r | |
498 | if ((OpenInfoBuffer[Index].ControllerHandle == ChildHandle) &&\r | |
499 | (OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {\r | |
500 | Status = EFI_SUCCESS;\r | |
501 | break;\r | |
502 | }\r | |
503 | }\r | |
504 | \r | |
505 | FreePool (OpenInfoBuffer);\r | |
506 | return Status;\r | |
507 | }\r | |
508 | \r | |
878ddf1f | 509 | /**\r |
510 | This function looks up a Unicode string in UnicodeStringTable. If Language is \r | |
511 | a member of SupportedLanguages and a Unicode string is found in UnicodeStringTable\r | |
512 | that matches the language code specified by Language, then it is returned in \r | |
513 | UnicodeString.\r | |
514 | \r | |
515 | @param Language A pointer to the ISO 639-2 language code for the \r | |
516 | Unicode string to look up and return.\r | |
517 | @param SupportedLanguages A pointer to the set of ISO 639-2 language codes \r | |
518 | that the Unicode string table supports. Language \r | |
519 | must be a member of this set.\r | |
520 | @param UnicodeStringTable A pointer to the table of Unicode strings.\r | |
521 | @param UnicodeString A pointer to the Unicode string from UnicodeStringTable\r | |
522 | that matches the language specified by Language.\r | |
523 | \r | |
524 | @retval EFI_SUCCESS The Unicode string that matches the language \r | |
525 | specified by Language was found\r | |
526 | in the table of Unicoide strings UnicodeStringTable, \r | |
527 | and it was returned in UnicodeString.\r | |
528 | @retval EFI_INVALID_PARAMETER Language is NULL.\r | |
529 | @retval EFI_INVALID_PARAMETER UnicodeString is NULL.\r | |
530 | @retval EFI_UNSUPPORTED SupportedLanguages is NULL.\r | |
531 | @retval EFI_UNSUPPORTED UnicodeStringTable is NULL.\r | |
532 | @retval EFI_UNSUPPORTED The language specified by Language is not a \r | |
533 | member of SupportedLanguages.\r | |
534 | @retval EFI_UNSUPPORTED The language specified by Language is not \r | |
535 | supported by UnicodeStringTable.\r | |
536 | \r | |
537 | **/\r | |
538 | EFI_STATUS\r | |
539 | EFIAPI\r | |
540 | LookupUnicodeString (\r | |
541 | IN CONST CHAR8 *Language,\r | |
542 | IN CONST CHAR8 *SupportedLanguages,\r | |
543 | IN CONST EFI_UNICODE_STRING_TABLE *UnicodeStringTable,\r | |
544 | OUT CHAR16 **UnicodeString\r | |
545 | )\r | |
546 | {\r | |
547 | //\r | |
548 | // Make sure the parameters are valid\r | |
549 | //\r | |
550 | if (Language == NULL || UnicodeString == NULL) {\r | |
551 | return EFI_INVALID_PARAMETER;\r | |
552 | }\r | |
553 | \r | |
554 | //\r | |
555 | // If there are no supported languages, or the Unicode String Table is empty, then the\r | |
556 | // Unicode String specified by Language is not supported by this Unicode String Table\r | |
557 | //\r | |
558 | if (SupportedLanguages == NULL || UnicodeStringTable == NULL) {\r | |
559 | return EFI_UNSUPPORTED;\r | |
560 | }\r | |
561 | \r | |
562 | //\r | |
563 | // Make sure Language is in the set of Supported Languages\r | |
564 | //\r | |
565 | while (*SupportedLanguages != 0) {\r | |
566 | if (CompareIso639LanguageCode (Language, SupportedLanguages)) {\r | |
567 | \r | |
568 | //\r | |
569 | // Search the Unicode String Table for the matching Language specifier\r | |
570 | //\r | |
571 | while (UnicodeStringTable->Language != NULL) {\r | |
572 | if (CompareIso639LanguageCode (Language, UnicodeStringTable->Language)) {\r | |
573 | \r | |
574 | //\r | |
575 | // A matching string was found, so return it\r | |
576 | //\r | |
577 | *UnicodeString = UnicodeStringTable->UnicodeString;\r | |
578 | return EFI_SUCCESS;\r | |
579 | }\r | |
580 | \r | |
581 | UnicodeStringTable++;\r | |
582 | }\r | |
583 | \r | |
584 | return EFI_UNSUPPORTED;\r | |
585 | }\r | |
586 | \r | |
587 | SupportedLanguages += 3;\r | |
588 | }\r | |
589 | \r | |
590 | return EFI_UNSUPPORTED;\r | |
591 | }\r | |
592 | \r | |
593 | /**\r | |
594 | This function adds a Unicode string to UnicodeStringTable.\r | |
595 | If Language is a member of SupportedLanguages then UnicodeString is added to \r | |
596 | UnicodeStringTable. New buffers are allocated for both Language and \r | |
597 | UnicodeString. The contents of Language and UnicodeString are copied into \r | |
598 | these new buffers. These buffers are automatically freed when \r | |
599 | FreeUnicodeStringTable() is called.\r | |
600 | \r | |
601 | @param Language A pointer to the ISO 639-2 language code for the Unicode \r | |
602 | string to add.\r | |
603 | @param SupportedLanguages A pointer to the set of ISO 639-2 language codes\r | |
604 | that the Unicode string table supports.\r | |
605 | Language must be a member of this set.\r | |
606 | @param UnicodeStringTable A pointer to the table of Unicode strings.\r | |
607 | @param UnicodeString A pointer to the Unicode string to add.\r | |
608 | \r | |
609 | @retval EFI_SUCCESS The Unicode string that matches the language \r | |
610 | specified by Language was found in the table of \r | |
611 | Unicode strings UnicodeStringTable, and it was \r | |
612 | returned in UnicodeString.\r | |
613 | @retval EFI_INVALID_PARAMETER Language is NULL.\r | |
614 | @retval EFI_INVALID_PARAMETER UnicodeString is NULL.\r | |
615 | @retval EFI_INVALID_PARAMETER UnicodeString is an empty string.\r | |
616 | @retval EFI_UNSUPPORTED SupportedLanguages is NULL.\r | |
617 | @retval EFI_ALREADY_STARTED A Unicode string with language Language is \r | |
618 | already present in UnicodeStringTable.\r | |
619 | @retval EFI_OUT_OF_RESOURCES There is not enough memory to add another \r | |
620 | Unicode string to UnicodeStringTable.\r | |
621 | @retval EFI_UNSUPPORTED The language specified by Language is not a \r | |
622 | member of SupportedLanguages.\r | |
623 | \r | |
624 | **/\r | |
625 | EFI_STATUS\r | |
626 | EFIAPI\r | |
627 | AddUnicodeString (\r | |
628 | IN CONST CHAR8 *Language,\r | |
629 | IN CONST CHAR8 *SupportedLanguages,\r | |
630 | IN EFI_UNICODE_STRING_TABLE **UnicodeStringTable,\r | |
631 | IN CONST CHAR16 *UnicodeString\r | |
632 | )\r | |
633 | {\r | |
634 | UINTN NumberOfEntries;\r | |
635 | EFI_UNICODE_STRING_TABLE *OldUnicodeStringTable;\r | |
636 | EFI_UNICODE_STRING_TABLE *NewUnicodeStringTable;\r | |
637 | UINTN UnicodeStringLength;\r | |
638 | \r | |
639 | //\r | |
640 | // Make sure the parameter are valid\r | |
641 | //\r | |
642 | if (Language == NULL || UnicodeString == NULL || UnicodeStringTable == NULL) {\r | |
643 | return EFI_INVALID_PARAMETER;\r | |
644 | }\r | |
645 | \r | |
646 | //\r | |
647 | // If there are no supported languages, then a Unicode String can not be added\r | |
648 | //\r | |
649 | if (SupportedLanguages == NULL) {\r | |
650 | return EFI_UNSUPPORTED;\r | |
651 | }\r | |
652 | \r | |
653 | //\r | |
654 | // If the Unicode String is empty, then a Unicode String can not be added\r | |
655 | //\r | |
656 | if (UnicodeString[0] == 0) {\r | |
657 | return EFI_INVALID_PARAMETER;\r | |
658 | }\r | |
659 | \r | |
660 | //\r | |
661 | // Make sure Language is a member of SupportedLanguages\r | |
662 | //\r | |
663 | while (*SupportedLanguages != 0) {\r | |
664 | if (CompareIso639LanguageCode (Language, SupportedLanguages)) {\r | |
665 | \r | |
666 | //\r | |
667 | // Determine the size of the Unicode String Table by looking for a NULL Language entry\r | |
668 | //\r | |
669 | NumberOfEntries = 0;\r | |
670 | if (*UnicodeStringTable != NULL) {\r | |
671 | OldUnicodeStringTable = *UnicodeStringTable;\r | |
672 | while (OldUnicodeStringTable->Language != NULL) {\r | |
673 | if (CompareIso639LanguageCode (Language, OldUnicodeStringTable->Language)) {\r | |
674 | return EFI_ALREADY_STARTED;\r | |
675 | }\r | |
676 | \r | |
677 | OldUnicodeStringTable++;\r | |
678 | NumberOfEntries++;\r | |
679 | }\r | |
680 | }\r | |
681 | \r | |
682 | //\r | |
683 | // Allocate space for a new Unicode String Table. It must hold the current number of\r | |
684 | // entries, plus 1 entry for the new Unicode String, plus 1 entry for the end of table\r | |
685 | // marker\r | |
686 | //\r | |
687 | NewUnicodeStringTable = AllocatePool ((NumberOfEntries + 2) * sizeof (EFI_UNICODE_STRING_TABLE));\r | |
688 | if (NewUnicodeStringTable == NULL) {\r | |
689 | return EFI_OUT_OF_RESOURCES;\r | |
690 | }\r | |
691 | \r | |
692 | //\r | |
693 | // If the current Unicode String Table contains any entries, then copy them to the\r | |
694 | // newly allocated Unicode String Table.\r | |
695 | //\r | |
696 | if (*UnicodeStringTable != NULL) {\r | |
697 | CopyMem (\r | |
698 | NewUnicodeStringTable,\r | |
699 | *UnicodeStringTable,\r | |
700 | NumberOfEntries * sizeof (EFI_UNICODE_STRING_TABLE)\r | |
701 | );\r | |
702 | }\r | |
703 | \r | |
704 | //\r | |
705 | // Allocate space for a copy of the Language specifier\r | |
706 | //\r | |
707 | NewUnicodeStringTable[NumberOfEntries].Language = AllocateCopyPool (3, Language);\r | |
708 | if (NewUnicodeStringTable[NumberOfEntries].Language == NULL) {\r | |
709 | gBS->FreePool (NewUnicodeStringTable);\r | |
710 | return EFI_OUT_OF_RESOURCES;\r | |
711 | }\r | |
712 | \r | |
713 | //\r | |
714 | // Compute the length of the Unicode String\r | |
715 | //\r | |
716 | for (UnicodeStringLength = 0; UnicodeString[UnicodeStringLength] != 0; UnicodeStringLength++)\r | |
717 | ;\r | |
718 | \r | |
719 | //\r | |
720 | // Allocate space for a copy of the Unicode String\r | |
721 | //\r | |
722 | NewUnicodeStringTable[NumberOfEntries].UnicodeString = AllocateCopyPool (\r | |
723 | (UnicodeStringLength + 1) * sizeof (CHAR16),\r | |
724 | UnicodeString\r | |
725 | );\r | |
726 | if (NewUnicodeStringTable[NumberOfEntries].UnicodeString == NULL) {\r | |
727 | gBS->FreePool (NewUnicodeStringTable[NumberOfEntries].Language);\r | |
728 | gBS->FreePool (NewUnicodeStringTable);\r | |
729 | return EFI_OUT_OF_RESOURCES;\r | |
730 | }\r | |
731 | \r | |
732 | //\r | |
733 | // Mark the end of the Unicode String Table\r | |
734 | //\r | |
735 | NewUnicodeStringTable[NumberOfEntries + 1].Language = NULL;\r | |
736 | NewUnicodeStringTable[NumberOfEntries + 1].UnicodeString = NULL;\r | |
737 | \r | |
738 | //\r | |
739 | // Free the old Unicode String Table\r | |
740 | //\r | |
741 | if (*UnicodeStringTable != NULL) {\r | |
742 | gBS->FreePool (*UnicodeStringTable);\r | |
743 | }\r | |
744 | \r | |
745 | //\r | |
746 | // Point UnicodeStringTable at the newly allocated Unicode String Table\r | |
747 | //\r | |
748 | *UnicodeStringTable = NewUnicodeStringTable;\r | |
749 | \r | |
750 | return EFI_SUCCESS;\r | |
751 | }\r | |
752 | \r | |
753 | SupportedLanguages += 3;\r | |
754 | }\r | |
755 | \r | |
756 | return EFI_UNSUPPORTED;\r | |
757 | }\r | |
758 | \r | |
759 | /**\r | |
760 | This function frees the table of Unicode strings in UnicodeStringTable.\r | |
761 | If UnicodeStringTable is NULL, then EFI_SUCCESS is returned.\r | |
762 | Otherwise, each language code, and each Unicode string in the Unicode string \r | |
763 | table are freed, and EFI_SUCCESS is returned.\r | |
764 | \r | |
765 | @param UnicodeStringTable A pointer to the table of Unicode strings.\r | |
766 | \r | |
767 | @retval EFI_SUCCESS The Unicode string table was freed.\r | |
768 | \r | |
769 | **/\r | |
770 | EFI_STATUS\r | |
771 | EFIAPI\r | |
772 | FreeUnicodeStringTable (\r | |
773 | IN EFI_UNICODE_STRING_TABLE *UnicodeStringTable\r | |
774 | )\r | |
775 | {\r | |
776 | UINTN Index;\r | |
777 | \r | |
778 | //\r | |
779 | // If the Unicode String Table is NULL, then it is already freed\r | |
780 | //\r | |
781 | if (UnicodeStringTable == NULL) {\r | |
782 | return EFI_SUCCESS;\r | |
783 | }\r | |
784 | \r | |
785 | //\r | |
786 | // Loop through the Unicode String Table until we reach the end of table marker\r | |
787 | //\r | |
788 | for (Index = 0; UnicodeStringTable[Index].Language != NULL; Index++) {\r | |
789 | \r | |
790 | //\r | |
791 | // Free the Language string from the Unicode String Table\r | |
792 | //\r | |
793 | gBS->FreePool (UnicodeStringTable[Index].Language);\r | |
794 | \r | |
795 | //\r | |
796 | // Free the Unicode String from the Unicode String Table\r | |
797 | //\r | |
798 | if (UnicodeStringTable[Index].UnicodeString != NULL) {\r | |
799 | gBS->FreePool (UnicodeStringTable[Index].UnicodeString);\r | |
800 | }\r | |
801 | }\r | |
802 | \r | |
803 | //\r | |
804 | // Free the Unicode String Table itself\r | |
805 | //\r | |
806 | gBS->FreePool (UnicodeStringTable);\r | |
807 | \r | |
808 | return EFI_SUCCESS;\r | |
809 | }\r | |
d958721a | 810 | \r |