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7936fb6a 1/** @file\r
2Private structure, MACRO and function definitions for User Interface related functionalities.\r
3\r
8d00a0f1 4Copyright (c) 2004 - 2008, Intel Corporation\r
7936fb6a 5All rights reserved. This program and the accompanying materials\r
6are licensed and made available under the terms and conditions of the BSD License\r
7which accompanies this distribution. The full text of the license may be found at\r
8http://opensource.org/licenses/bsd-license.php\r
9\r
10THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12\r
13**/\r
14\r
15#ifndef _UI_H_\r
16#define _UI_H_\r
17\r
18#include "Setup.h"\r
19\r
20//\r
21// Globals\r
22//\r
23#define REGULAR_NUMERIC 0\r
24#define TIME_NUMERIC 1\r
25#define DATE_NUMERIC 2\r
26\r
27#define SUBTITLE_INDENT 2\r
28\r
29typedef enum {\r
30 UiNoOperation,\r
31 UiDefault,\r
32 UiSelect,\r
33 UiUp,\r
34 UiDown,\r
35 UiLeft,\r
36 UiRight,\r
37 UiReset,\r
38 UiSave,\r
39 UiPrevious,\r
40 UiPageUp,\r
41 UiPageDown,\r
42 UiMaxOperation\r
43} UI_SCREEN_OPERATION;\r
44\r
45typedef enum {\r
46 CfInitialization,\r
47 CfCheckSelection,\r
48 CfRepaint,\r
49 CfRefreshHighLight,\r
50 CfUpdateHelpString,\r
51 CfPrepareToReadKey,\r
52 CfReadKey,\r
53 CfScreenOperation,\r
54 CfUiPrevious,\r
55 CfUiSelect,\r
56 CfUiReset,\r
57 CfUiLeft,\r
58 CfUiRight,\r
59 CfUiUp,\r
60 CfUiPageUp,\r
61 CfUiPageDown,\r
62 CfUiDown,\r
63 CfUiSave,\r
64 CfUiDefault,\r
65 CfUiNoOperation,\r
66 CfExit,\r
67 CfMaxControlFlag\r
68} UI_CONTROL_FLAG;\r
69\r
70#define UI_ACTION_NONE 0\r
71#define UI_ACTION_REFRESH_FORM 1\r
72#define UI_ACTION_REFRESH_FORMSET 2\r
73#define UI_ACTION_EXIT 3\r
74\r
75typedef struct {\r
76 EFI_HII_HANDLE Handle;\r
77\r
78 //\r
79 // Target formset/form/Question information\r
80 //\r
81 EFI_GUID FormSetGuid;\r
82 UINT16 FormId;\r
83 UINT16 QuestionId;\r
84\r
85 UINTN TopRow;\r
86 UINTN BottomRow;\r
87 UINTN PromptCol;\r
88 UINTN OptionCol;\r
89 UINTN CurrentRow;\r
90\r
91 //\r
92 // Ation for Browser to taken:\r
93 // UI_ACTION_NONE - navigation inside a form\r
94 // UI_ACTION_REFRESH_FORM - re-evaluate expressions and repaint form\r
95 // UI_ACTION_REFRESH_FORMSET - re-parse formset IFR binary\r
96 //\r
97 UINTN Action;\r
98\r
99 //\r
100 // Current selected fomset/form/Question\r
101 //\r
102 FORM_BROWSER_FORMSET *FormSet;\r
103 FORM_BROWSER_FORM *Form;\r
104 FORM_BROWSER_STATEMENT *Statement;\r
105} UI_MENU_SELECTION;\r
106\r
107#define UI_MENU_OPTION_SIGNATURE EFI_SIGNATURE_32 ('u', 'i', 'm', 'm')\r
108#define UI_MENU_LIST_SIGNATURE EFI_SIGNATURE_32 ('u', 'i', 'm', 'l')\r
109\r
110typedef struct {\r
111 UINTN Signature;\r
112 LIST_ENTRY Link;\r
113\r
114 EFI_HII_HANDLE Handle;\r
115 FORM_BROWSER_STATEMENT *ThisTag;\r
116 UINT16 EntryNumber;\r
117\r
118 UINTN Row;\r
119 UINTN Col;\r
120 UINTN OptCol;\r
121 CHAR16 *Description;\r
122 UINTN Skip; // Number of lines\r
123\r
124 //\r
125 // Display item sequence for date/time\r
126 // Date: Month/Day/Year\r
127 // Sequence: 0 1 2\r
128 //\r
129 // Time: Hour : Minute : Second\r
130 // Sequence: 0 1 2\r
131 //\r
132 //\r
133 UINTN Sequence;\r
134\r
135 BOOLEAN GrayOut;\r
136 BOOLEAN ReadOnly;\r
137} UI_MENU_OPTION;\r
138\r
139#define MENU_OPTION_FROM_LINK(a) CR (a, UI_MENU_OPTION, Link, UI_MENU_OPTION_SIGNATURE)\r
140\r
141typedef struct {\r
142 UINTN Signature;\r
143 LIST_ENTRY MenuLink;\r
144\r
145 UINT16 FormId;\r
146 UINT16 QuestionId;\r
147} UI_MENU_LIST;\r
148\r
149typedef struct _MENU_REFRESH_ENTRY {\r
150 struct _MENU_REFRESH_ENTRY *Next;\r
151 UI_MENU_OPTION *MenuOption; // Describes the entry needing an update\r
152 UI_MENU_SELECTION *Selection;\r
153 UINTN CurrentColumn;\r
154 UINTN CurrentRow;\r
155 UINTN CurrentAttribute;\r
156} MENU_REFRESH_ENTRY;\r
157\r
158typedef struct {\r
159 UINT16 ScanCode;\r
160 UI_SCREEN_OPERATION ScreenOperation;\r
161} SCAN_CODE_TO_SCREEN_OPERATION;\r
162\r
163typedef struct {\r
164 UI_SCREEN_OPERATION ScreenOperation;\r
165 UI_CONTROL_FLAG ControlFlag;\r
166} SCREEN_OPERATION_T0_CONTROL_FLAG;\r
167\r
168\r
169extern LIST_ENTRY gMenuList;\r
170extern MENU_REFRESH_ENTRY *gMenuRefreshHead;\r
171extern UI_MENU_SELECTION *gCurrentSelection;\r
8d00a0f1 172extern BOOLEAN mHiiPackageListUpdated;\r
7936fb6a 173\r
174//\r
175// Global Functions\r
176//\r
177/**\r
178 Initialize Menu option list.\r
179\r
180**/\r
181VOID\r
182UiInitMenu (\r
183 VOID\r
ed66e1bc 184 );\r
7936fb6a 185\r
186/**\r
187 Initialize Menu option list.\r
188\r
189**/\r
190VOID\r
191UiInitMenuList (\r
192 VOID\r
ed66e1bc 193 );\r
7936fb6a 194\r
195/**\r
196 Remove a Menu in list, and return FormId/QuestionId for previous Menu.\r
197\r
198 @param Selection Menu selection.\r
199\r
200**/\r
201VOID\r
202UiRemoveMenuListEntry (\r
203 OUT UI_MENU_SELECTION *Selection\r
ed66e1bc 204 );\r
7936fb6a 205\r
206/**\r
207 Free Menu option linked list.\r
208\r
209**/\r
210VOID\r
211UiFreeMenuList (\r
212 VOID\r
ed66e1bc 213 );\r
7936fb6a 214\r
215/**\r
216 Add one menu entry to the linked lst\r
217\r
218 @param Selection Menu selection.\r
219\r
220**/\r
221VOID\r
222UiAddMenuListEntry (\r
223 IN UI_MENU_SELECTION *Selection\r
ed66e1bc 224 );\r
7936fb6a 225\r
226/**\r
227 Free Menu option linked list.\r
228\r
229**/\r
230VOID\r
231UiFreeMenu (\r
232 VOID\r
ed66e1bc 233 );\r
7936fb6a 234\r
235/**\r
236 Add one menu option by specified description and context.\r
237\r
238 @param String String description for this option.\r
239 @param Handle Hii handle for the package list.\r
240 @param Statement Statement of this Menu Option.\r
241 @param NumberOfLines Display lines for this Menu Option.\r
242 @param MenuItemCount The index for this Option in the Menu.\r
243\r
244**/\r
245VOID\r
246UiAddMenuOption (\r
247 IN CHAR16 *String,\r
248 IN EFI_HII_HANDLE Handle,\r
249 IN FORM_BROWSER_STATEMENT *Statement,\r
250 IN UINT16 NumberOfLines,\r
251 IN UINT16 MenuItemCount\r
ed66e1bc 252 );\r
7936fb6a 253\r
254/**\r
255 Display menu and wait for user to select one menu option, then return it.\r
256 If AutoBoot is enabled, then if user doesn't select any option,\r
257 after period of time, it will automatically return the first menu option.\r
258\r
259 @param Selection Menu selection.\r
260\r
261 @return Return the pointer of the menu which selected,\r
262 @return otherwise return NULL.\r
263\r
264**/\r
265EFI_STATUS\r
266UiDisplayMenu (\r
267 IN OUT UI_MENU_SELECTION *Selection\r
ed66e1bc 268 );\r
7936fb6a 269\r
270/**\r
271 Free up the resource allocated for all strings required\r
272 by Setup Browser.\r
273\r
274**/\r
275VOID\r
276FreeBrowserStrings (\r
277 VOID\r
ed66e1bc 278 );\r
7936fb6a 279\r
280/**\r
281 The worker function that send the displays to the screen. On output,\r
282 the selection made by user is returned.\r
283\r
284 @param Selection On input, Selection tell setup browser the information\r
285 about the Selection, form and formset to be displayed.\r
286 On output, Selection return the screen item that is selected\r
287 by user.\r
288\r
289 @retval EFI_SUCCESS The page is displayed successfully.\r
290 @return Other value if the page failed to be diplayed.\r
291\r
292**/\r
293EFI_STATUS\r
294SetupBrowser (\r
295 IN OUT UI_MENU_SELECTION *Selection\r
ed66e1bc 296 );\r
7936fb6a 297\r
298/**\r
299 VSPrint worker function that prints a Value as a decimal number in Buffer.\r
300\r
301 @param Buffer Location to place ascii decimal number string of Value.\r
302 @param Flags Flags to use in printing decimal string, see file header for\r
303 details.\r
304 @param Value Decimal value to convert to a string in Buffer.\r
305\r
306 @return Number of characters printed.\r
307\r
308**/\r
309VOID\r
310ValueToString (\r
311 IN CHAR16 *Buffer,\r
312 IN BOOLEAN Flags,\r
313 IN INT64 Value\r
ed66e1bc 314 );\r
7936fb6a 315\r
316/**\r
317 Set Buffer to Value for Size bytes.\r
318\r
319 @param Buffer Memory to set.\r
320 @param Size Number of bytes to set\r
321 @param Value Value of the set operation.\r
322\r
323**/\r
324VOID\r
325SetUnicodeMem (\r
326 IN VOID *Buffer,\r
327 IN UINTN Size,\r
328 IN CHAR16 Value\r
ed66e1bc 329 );\r
7936fb6a 330\r
331/**\r
332 Wait for a given event to fire, or for an optional timeout to expire.\r
333\r
334 @param Event The event to wait for\r
335 @param Timeout An optional timeout value in 100 ns units.\r
336 @param RefreshInterval Menu refresh interval (in seconds).\r
337\r
338 @retval EFI_SUCCESS Event fired before Timeout expired.\r
339 @retval EFI_TIME_OUT Timout expired before Event fired.\r
340\r
341**/\r
342EFI_STATUS\r
343UiWaitForSingleEvent (\r
344 IN EFI_EVENT Event,\r
345 IN UINT64 Timeout, OPTIONAL\r
346 IN UINT8 RefreshInterval OPTIONAL\r
ed66e1bc 347 );\r
7936fb6a 348\r
349/**\r
350 Draw a pop up windows based on the dimension, number of lines and\r
351 strings specified.\r
352\r
353 @param RequestedWidth The width of the pop-up.\r
354 @param NumberOfLines The number of lines.\r
7936fb6a 355 @param ... A series of text strings that displayed in the pop-up.\r
356\r
357**/\r
358VOID\r
359CreatePopUp (\r
360 IN UINTN ScreenWidth,\r
361 IN UINTN NumberOfLines,\r
7936fb6a 362 ...\r
ed66e1bc 363 );\r
7936fb6a 364\r
365/**\r
366 Get string or password input from user.\r
367\r
368 @param MenuOption Pointer to the current input menu.\r
369 @param Prompt The prompt string shown on popup window.\r
370 @param StringPtr Destination for use input string.\r
371\r
372 @retval EFI_SUCCESS If string input is read successfully\r
373 @retval EFI_DEVICE_ERROR If operation fails\r
374\r
375**/\r
376EFI_STATUS\r
377ReadString (\r
378 IN UI_MENU_OPTION *MenuOption,\r
379 IN CHAR16 *Prompt,\r
380 OUT CHAR16 *StringPtr\r
ed66e1bc 381 );\r
7936fb6a 382\r
383/**\r
384 Get selection for OneOf and OrderedList (Left/Right will be ignored).\r
385\r
386 @param Selection Pointer to current selection.\r
387 @param MenuOption Pointer to the current input menu.\r
388\r
389 @retval EFI_SUCCESS If Option input is processed successfully\r
390 @retval EFI_DEVICE_ERROR If operation fails\r
391\r
392**/\r
393EFI_STATUS\r
394GetSelectionInputPopUp (\r
395 IN UI_MENU_SELECTION *Selection,\r
396 IN UI_MENU_OPTION *MenuOption\r
ed66e1bc 397 );\r
7936fb6a 398\r
399/**\r
400 This routine reads a numeric value from the user input.\r
401\r
402 @param Selection Pointer to current selection.\r
403 @param MenuOption Pointer to the current input menu.\r
404\r
405 @retval EFI_SUCCESS If numerical input is read successfully\r
406 @retval EFI_DEVICE_ERROR If operation fails\r
407\r
408**/\r
409EFI_STATUS\r
410GetNumericInput (\r
411 IN UI_MENU_SELECTION *Selection,\r
412 IN UI_MENU_OPTION *MenuOption\r
ed66e1bc 413 );\r
7936fb6a 414\r
415/**\r
416 Update status bar on the bottom of menu.\r
417\r
418 @param MessageType The type of message to be shown.\r
419 @param Flags The flags in Question header.\r
420 @param State Set or clear.\r
421\r
422**/\r
423VOID\r
424UpdateStatusBar (\r
425 IN UINTN MessageType,\r
426 IN UINT8 Flags,\r
427 IN BOOLEAN State\r
ed66e1bc 428 );\r
7936fb6a 429\r
430/**\r
431 Process Question Config.\r
432\r
433 @param Selection The UI menu selection.\r
434 @param Question The Question to be peocessed.\r
435\r
436 @retval EFI_SUCCESS Question Config process success.\r
437 @retval Other Question Config process fail.\r
438\r
439**/\r
440EFI_STATUS\r
441ProcessQuestionConfig (\r
442 IN UI_MENU_SELECTION *Selection,\r
443 IN FORM_BROWSER_STATEMENT *Question\r
ed66e1bc 444 );\r
7936fb6a 445\r
446/**\r
447 Print Question Value according to it's storage width and display attributes.\r
448\r
449 @param Question The Question to be printed.\r
450 @param FormattedNumber Buffer for output string.\r
451 @param BufferSize The FormattedNumber buffer size in bytes.\r
452\r
453 @retval EFI_SUCCESS Print success.\r
454 @retval EFI_BUFFER_TOO_SMALL Buffer size is not enough for formatted number.\r
455\r
456**/\r
457EFI_STATUS\r
458PrintFormattedNumber (\r
459 IN FORM_BROWSER_STATEMENT *Question,\r
460 IN OUT CHAR16 *FormattedNumber,\r
461 IN UINTN BufferSize\r
ed66e1bc 462 );\r
7936fb6a 463\r
464/**\r
465 Search an Option of a Question by its value.\r
466\r
467 @param Question The Question\r
468 @param OptionValue Value for Option to be searched.\r
469\r
470 @retval Pointer Pointer to the found Option.\r
471 @retval NULL Option not found.\r
472\r
473**/\r
474QUESTION_OPTION *\r
475ValueToOption (\r
476 IN FORM_BROWSER_STATEMENT *Question,\r
477 IN EFI_HII_VALUE *OptionValue\r
ed66e1bc 478 );\r
7936fb6a 479\r
480/**\r
481 Process a Question's Option (whether selected or un-selected).\r
482\r
483 @param Selection Pointer to UI_MENU_SELECTION.\r
484 @param MenuOption The MenuOption for this Question.\r
485 @param Selected TRUE: if Question is selected.\r
486 @param OptionString Pointer of the Option String to be displayed.\r
487\r
488 @retval EFI_SUCCESS Question Option process success.\r
489 @retval Other Question Option process fail.\r
490\r
491**/\r
492EFI_STATUS\r
493ProcessOptions (\r
494 IN UI_MENU_SELECTION *Selection,\r
495 IN UI_MENU_OPTION *MenuOption,\r
496 IN BOOLEAN Selected,\r
497 OUT CHAR16 **OptionString\r
ed66e1bc 498 );\r
7936fb6a 499\r
500/**\r
501 Process the help string: Split StringPtr to several lines of strings stored in\r
502 FormattedString and the glyph width of each line cannot exceed gHelpBlockWidth.\r
503\r
504 @param StringPtr The entire help string.\r
505 @param FormattedString The oupput formatted string.\r
506 @param RowCount TRUE: if Question is selected.\r
507\r
508**/\r
509VOID\r
510ProcessHelpString (\r
511 IN CHAR16 *StringPtr,\r
512 OUT CHAR16 **FormattedString,\r
513 IN UINTN RowCount\r
ed66e1bc 514 );\r
7936fb6a 515\r
516/**\r
517 Update key's help imformation.\r
518\r
519 @param MenuOption The Menu option\r
520 @param Selected Whether or not a tag be selected\r
521\r
522**/\r
523VOID\r
524UpdateKeyHelp (\r
525 IN UI_MENU_OPTION *MenuOption,\r
526 IN BOOLEAN Selected\r
ed66e1bc 527 );\r
7936fb6a 528\r
529/**\r
530 Clear retangle with specified text attribute.\r
531\r
532 @param LeftColumn Left column of retangle.\r
533 @param RightColumn Right column of retangle.\r
534 @param TopRow Start row of retangle.\r
535 @param BottomRow End row of retangle.\r
536 @param TextAttribute The character foreground and background.\r
537\r
538**/\r
539VOID\r
540ClearLines (\r
541 UINTN LeftColumn,\r
542 UINTN RightColumn,\r
543 UINTN TopRow,\r
544 UINTN BottomRow,\r
545 UINTN TextAttribute\r
ed66e1bc 546 );\r
7936fb6a 547\r
548/**\r
549 Count the storage space of a Unicode string.\r
550\r
551 This function handles the Unicode string with NARROW_CHAR\r
552 and WIDE_CHAR control characters. NARROW_HCAR and WIDE_CHAR\r
553 does not count in the resultant output. If a WIDE_CHAR is \r
554 hit, then 2 Unicode character will consume an output storage\r
555 space with size of CHAR16 till a NARROW_CHAR is hit.\r
556\r
557 @param String The input string to be counted.\r
558\r
559 @return Storage space for the input string.\r
560\r
561**/\r
562UINTN\r
563GetStringWidth (\r
564 CHAR16 *String\r
ed66e1bc 565 );\r
7936fb6a 566\r
567/**\r
568 Will copy LineWidth amount of a string in the OutputString buffer and return the\r
569 number of CHAR16 characters that were copied into the OutputString buffer.\r
570\r
571 @param InputString String description for this option.\r
572 @param LineWidth Width of the desired string to extract in CHAR16\r
573 characters\r
574 @param Index Where in InputString to start the copy process\r
575 @param OutputString Buffer to copy the string into\r
576\r
577 @return Returns the number of CHAR16 characters that were copied into the OutputString buffer.\r
578\r
579**/\r
580UINT16\r
581GetLineByWidth (\r
582 IN CHAR16 *InputString,\r
583 IN UINT16 LineWidth,\r
584 IN OUT UINTN *Index,\r
585 OUT CHAR16 **OutputString\r
ed66e1bc 586 );\r
7936fb6a 587\r
588/**\r
589 Get the supported width for a particular op-code\r
590\r
591 @param Statement The FORM_BROWSER_STATEMENT structure passed in.\r
592 @param Handle The handle in the HII database being used\r
593\r
594 @return Returns the number of CHAR16 characters that is support.\r
595\r
596**/\r
597UINT16\r
598GetWidth (\r
599 IN FORM_BROWSER_STATEMENT *Statement,\r
600 IN EFI_HII_HANDLE Handle\r
ed66e1bc 601 );\r
7936fb6a 602\r
603/**\r
604 Concatenate a narrow string to another string.\r
605\r
606 @param Destination The destination string.\r
607 @param Source The source string. The string to be concatenated.\r
608 to the end of Destination.\r
609\r
610**/\r
611VOID\r
612NewStrCat (\r
613 CHAR16 *Destination,\r
614 CHAR16 *Source\r
ed66e1bc 615 );\r
7936fb6a 616\r
617/**\r
618 Wait for a key to be pressed by user.\r
619\r
620 @param Key The key which is pressed by user.\r
621\r
622 @retval EFI_SUCCESS The function always completed successfully.\r
623\r
624**/\r
625EFI_STATUS\r
626WaitForKeyStroke (\r
627 OUT EFI_INPUT_KEY *Key\r
ed66e1bc 628 );\r
7936fb6a 629\r
630/**\r
631 Reset stack pointer to begin of the stack.\r
632\r
633**/\r
634VOID\r
635ResetScopeStack (\r
636 VOID\r
ed66e1bc 637 );\r
7936fb6a 638\r
639/**\r
640 Push an Operand onto the Stack\r
641\r
642 @param Operand Operand to push.\r
643\r
644 @retval EFI_SUCCESS The value was pushed onto the stack.\r
645 @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the\r
646 stack.\r
647\r
648**/\r
649EFI_STATUS\r
650PushScope (\r
651 IN UINT8 Operand\r
ed66e1bc 652 );\r
7936fb6a 653\r
654/**\r
655 Pop an Operand from the Stack\r
656\r
657 @param Operand Operand to pop.\r
658\r
659 @retval EFI_SUCCESS The value was pushed onto the stack.\r
660 @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the\r
661 stack.\r
662\r
663**/\r
664EFI_STATUS\r
665PopScope (\r
666 OUT UINT8 *Operand\r
ed66e1bc 667 );\r
7936fb6a 668\r
669/**\r
670 Get Form given its FormId.\r
671\r
672 @param FormSet The formset which contains this form.\r
673 @param FormId Id of this form.\r
674\r
675 @retval Pointer The form.\r
676 @retval NULL Specified Form is not found in the formset.\r
677\r
678**/\r
679FORM_BROWSER_FORM *\r
680IdToForm (\r
681 IN FORM_BROWSER_FORMSET *FormSet,\r
682 IN UINT16 FormId\r
ed66e1bc 683 );\r
7936fb6a 684\r
685/**\r
686 Search a Question in Formset scope using its QuestionId.\r
687\r
688 @param FormSet The formset which contains this form.\r
689 @param Form The form which contains this Question.\r
690 @param QuestionId Id of this Question.\r
691\r
692 @retval Pointer The Question.\r
693 @retval NULL Specified Question not found in the form.\r
694\r
695**/\r
696FORM_BROWSER_STATEMENT *\r
697IdToQuestion (\r
698 IN FORM_BROWSER_FORMSET *FormSet,\r
699 IN FORM_BROWSER_FORM *Form,\r
700 IN UINT16 QuestionId\r
ed66e1bc 701 );\r
7936fb6a 702\r
703/**\r
704 Zero extend integer/boolean/date/time to UINT64 for comparing.\r
705\r
706 @param Value HII Value to be converted.\r
707\r
708**/\r
709VOID\r
710ExtendValueToU64 (\r
711 IN EFI_HII_VALUE *Value\r
ed66e1bc 712 );\r
7936fb6a 713\r
714/**\r
715 Compare two Hii value.\r
716\r
717 @param Value1 Expression value to compare on left-hand.\r
718 @param Value2 Expression value to compare on right-hand.\r
719 @param HiiHandle Only required for string compare.\r
720\r
721 @retval EFI_INVALID_PARAMETER Could not perform comparation on two values.\r
722 @retval 0 Two operators equeal.\r
723 @return Positive value if Value1 is greater than Value2.\r
724 @retval Negative value if Value1 is less than Value2.\r
725\r
726**/\r
727INTN\r
728CompareHiiValue (\r
729 IN EFI_HII_VALUE *Value1,\r
730 IN EFI_HII_VALUE *Value2,\r
731 IN EFI_HII_HANDLE HiiHandle OPTIONAL\r
ed66e1bc 732 );\r
7936fb6a 733\r
734/**\r
735 Evaluate the result of a HII expression\r
736\r
737 @param FormSet FormSet associated with this expression.\r
738 @param Form Form associated with this expression.\r
739 @param Expression Expression to be evaluated.\r
740\r
741 @retval EFI_SUCCESS The expression evaluated successfuly\r
742 @retval EFI_NOT_FOUND The Question which referenced by a QuestionId\r
743 could not be found.\r
744 @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the\r
745 stack.\r
746 @retval EFI_ACCESS_DENIED The pop operation underflowed the stack\r
747 @retval EFI_INVALID_PARAMETER Syntax error with the Expression\r
748\r
749**/\r
750EFI_STATUS\r
751EvaluateExpression (\r
752 IN FORM_BROWSER_FORMSET *FormSet,\r
753 IN FORM_BROWSER_FORM *Form,\r
754 IN OUT FORM_EXPRESSION *Expression\r
ed66e1bc 755 );\r
7936fb6a 756\r
757#endif // _UI_H\r