4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncUtility functions for expression evaluation.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncCopyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncThis program and the accompanying materials
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncare licensed and made available under the terms and conditions of the BSD License
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncwhich accompanies this distribution. The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncTHE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncWITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync// Global stack used to evaluate boolean expresions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFI_HII_VALUE *mExpressionEvaluationStackEnd = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFI_HII_VALUE *mExpressionEvaluationStackPointer = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncFORM_EXPRESSION **mStatementExpressionPointer = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync// Unicode collation protocol interface
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncEFI_UNICODE_COLLATION_PROTOCOL *mUnicodeCollation = NULL;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Grow size of the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This is an internal function.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Stack On input: old stack; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackPtr On input: old stack pointer; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackEnd On input: old stack end; On output: new stack end
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Grow stack success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES No enough memory for stack space.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync NewStack = AllocatePool (Size * sizeof (EFI_HII_VALUE));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Copy from Old Stack to the New Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Free The Old Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Make the Stack pointer point to the old data in the new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push an element onto the Boolean Stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Stack On input: old stack; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackPtr On input: old stack pointer; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackEnd On input: old stack end; On output: new stack end
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Data Data to push.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Push stack success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check for a stack overflow condition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Grow the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Push the item onto the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (*StackPtr)->Buffer = AllocateCopyPool(Data->BufferLen, Data->Buffer);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop an element from the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Stack On input: old stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackPtr On input: old stack pointer; On output: new stack pointer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Data Data to pop.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was popped onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_ACCESS_DENIED The pop operation underflowed the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check for a stack underflow condition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop the item off the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reset stack pointer to begin of the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mCurrentExpressionPointer = mCurrentExpressionStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mStatementExpressionPointer = mStatementExpressionStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push current expression onto the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Pointer Pointer to current expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop current expression from the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Pointer Pointer to current expression to be pop.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reset stack pointer to begin of the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mMapExpressionListPointer = mMapExpressionListStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Grow size of the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This is an internal function.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Stack On input: old stack; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackPtr On input: old stack pointer; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackEnd On input: old stack end; On output: new stack end
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param MemberSize The stack member size.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Grow stack success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES No enough memory for stack space.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Copy from Old Stack to the New Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Free The Old Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Make the Stack pointer point to the old data in the new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push an element onto the Stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Stack On input: old stack; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackPtr On input: old stack pointer; On output: new stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackEnd On input: old stack end; On output: new stack end
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Data Data to push.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Push stack success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check for a stack overflow condition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Grow the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = GrowConditionalStack (Stack, StackPtr, StackEnd, sizeof (FORM_EXPRESSION *));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Push the item onto the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (*StackPtr, Data, sizeof (FORM_EXPRESSION *));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop an element from the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Stack On input: old stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackPtr On input: old stack pointer; On output: new stack pointer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Data Data to pop.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was popped onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_ACCESS_DENIED The pop operation underflowed the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check for a stack underflow condition
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop the item off the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (Data, *StackPtr, sizeof (FORM_EXPRESSION *));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Get the expression list count.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Level Which type this expression belong to. Form,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync statement or option?
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval >=0 The expression count
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval -1 Input parameter error.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return mFormExpressionPointer - mFormExpressionStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return mStatementExpressionPointer - mStatementExpressionStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return mOptionExpressionPointer - mOptionExpressionStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Get the expression Buffer pointer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Level Which type this expression belong to. Form,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync statement or option?
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval The start pointer of the expression buffer or NULL.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push the expression options onto the Stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Pointer Pointer to the current expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Level Which type this expression belong to. Form,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync statement or option?
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop the expression options from the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Level Which type this expression belong to. Form,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync statement or option?
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push the list of map expression onto the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Pointer Pointer to the list of map expression to be pushed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop the list of map expression from the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Pointer Pointer to the list of map expression to be pop.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Reset stack pointer to begin of the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push an Operand onto the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Operand Operand to push.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop an Operand from the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Operand Operand to pop.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Push an Expression value onto the Stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value Expression value to push.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was pushed onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Pop an Expression value from the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value Expression value to pop.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The value was popped onto the stack.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_ACCESS_DENIED The pop operation underflowed the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mExpressionEvaluationStack + mExpressionEvaluationStackOffset,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Get current stack offset from stack start.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @return Stack offset to stack start.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TempStackOffset = mExpressionEvaluationStackOffset;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mExpressionEvaluationStackOffset = mExpressionEvaluationStackPointer - mExpressionEvaluationStack;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Restore stack offset based on input stack offset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param StackOffset Offset to stack start.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Get Form given its FormId.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet The formset which contains this form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormId Id of this form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Pointer The form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval NULL Specified Form is not found in the formset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Search a Question in Form scope using its QuestionId.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Form The form which contains this Question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param QuestionId Id of this Question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Pointer The Question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval NULL Specified Question not found in the form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // The value of zero is reserved
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = FORM_BROWSER_STATEMENT_FROM_LINK (Link);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Link = GetNextNode (&Form->StatementListHead, Link);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Search a Question in Formset scope using its QuestionId.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet The formset which contains this form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Form The form which contains this Question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param QuestionId Id of this Question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Pointer The Question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval NULL Specified Question not found in the form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Search in the form scope first
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Search in the formset scope
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // EFI variable storage may be updated by Callback() asynchronous,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // to keep synchronous, always reload the Question Value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Question->Storage->Type == EFI_HII_VARSTORE_EFI_VARIABLE) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Get Expression given its RuleId.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Form The form which contains this Expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param RuleId Id of this Expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Pointer The Expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval NULL Specified Expression not found in the form.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (!IsNull (&Form->ExpressionListHead, Link)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Expression->Type == EFI_HII_EXPRESSION_RULE && Expression->RuleId == RuleId) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Link = GetNextNode (&Form->ExpressionListHead, Link);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Locate the Unicode Collation Protocol interface for later use.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Protocol interface initialize success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Protocol interface initialize failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // BUGBUG: Proper impelmentation is to locate all Unicode Collation Protocol
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // instances first and then select one which support English language.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Current implementation just pick the first instance.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Convert the input Unicode character to upper.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param String Th Unicode character to be converted.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (*String != 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_TO_STRING.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Format String format in EFI_IFR_TO_STRING.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync BufferSize = MAXIMUM_VALUE_CHARACTERS * sizeof (CHAR16);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync UnicodeSPrint (Buffer, BufferSize, PrintFormat, Value.Value.u64);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // + 3 is base on the unicode format, the length may be odd number,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // so need 1 byte to align, also need 2 bytes for L'\0'.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Format == EFI_IFR_STRING_UNICODE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (TmpBuf, Value.Buffer, Value.BufferLen * sizeof (CHAR16));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync UnicodeSPrint (Buffer, MAXIMUM_VALUE_CHARACTERS, PrintFormat, Value.Buffer);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Value.string = NewString (String, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_TO_UINT.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value.Type >= EFI_IFR_TYPE_OTHER && Value.Type != EFI_IFR_TYPE_BUFFER) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String = GetToken (Value.Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Hex string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // decimal string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_CATENATE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[0] - The second string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[1] - The first string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value[Index].Type != EFI_IFR_TYPE_STRING && Value[Index].Type != EFI_IFR_TYPE_BUFFER) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String[Index] = GetToken (Value[Index].Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StringPtr= AllocatePool (StrSize (String[1]) + Size);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Value.string = NewString (StringPtr, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->BufferLen = (UINT16) (Value[0].BufferLen + Value[1].BufferLen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Buffer = AllocateZeroPool (Result->BufferLen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (Result->Buffer, Value[0].Buffer, Value[0].BufferLen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (&Result->Buffer[Value[0].BufferLen], Value[1].Buffer, Value[1].BufferLen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_MATCH.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[0] - The string to search
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[1] - pattern
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String[Index] = GetToken (Value[Index].Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Value.b = mUnicodeCollation->MetaiMatch (mUnicodeCollation, String[0], String[1]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_FIND.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Format Case sensitive or insensitive.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[0] - sub-string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[1] - The string to search
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value[Index + 1].Type != EFI_IFR_TYPE_STRING) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String[Index] = GetToken (Value[Index + 1].Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Case insensitive, convert both string to upper case
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Value.u64 = (StringPtr == NULL) ? 0xFFFFFFFFFFFFFFFFULL : (StringPtr - String[1]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_MID.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value[2].Type != EFI_IFR_TYPE_STRING && Value[2].Type != EFI_IFR_TYPE_BUFFER) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String = GetToken (Value[2].Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Value.string = NewString (SubString, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->BufferLen = (UINT16)((BufferLen - Base) < Length ? (BufferLen - Base) : Length);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Buffer = AllocateZeroPool (Result->BufferLen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (Result->Buffer, &Value[2].Buffer[Base], Result->BufferLen);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_TOKEN.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[0] - Delimiter
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[1] - The string to search
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value[Index + 1].Type != EFI_IFR_TYPE_STRING) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String[Index] = GetToken (Value[Index + 1].Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (Count > 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Skip over the delimiter
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // nth delimited sub-string not found, push an empty string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Put a NULL terminator for nth delimited sub-string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Result->Value.string = NewString (SubString, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate opcode EFI_IFR_SPAN.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet Formset which contains this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Flags FIRST_MATCHING or FIRST_NON_MATCHING.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Evaluation result for this opcode.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Opcode evaluation success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval Other Opcode evaluation failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[0] - Charset
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String[1] - The string to search
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value[Index + 1].Type != EFI_IFR_TYPE_STRING) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync String[Index] = GetToken (Value[Index + 1].Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (*StringPtr >= Charset[Index] && *StringPtr <= Charset[Index + 1]) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Skip characters pair representing low-end of a range and high-end of a range
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Zero extend integer/boolean/date/time to UINT64 for comparing.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value HII Value to be converted.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Compare two Hii value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value1 Expression value to compare on left-hand.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value2 Expression value to compare on right-hand.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Result Return value after compare.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync retval 0 Two operators equal.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return Positive value if Value1 is greater than Value2.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync retval Negative value if Value1 is less than Value2.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param HiiHandle Only required for string compare.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval other Could not perform compare on two values.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS Compare the value success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value1->Type >= EFI_IFR_TYPE_OTHER || Value2->Type >= EFI_IFR_TYPE_OTHER ) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value1->Type != EFI_IFR_TYPE_BUFFER && Value2->Type != EFI_IFR_TYPE_BUFFER) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value1->Type == EFI_IFR_TYPE_STRING || Value2->Type == EFI_IFR_TYPE_STRING ) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Both Operator should be type of String
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value1->Value.string == 0 || Value2->Value.string == 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // StringId 0 is reserved
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value1->Value.string == Value2->Value.string) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // String not found
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value1->Type == EFI_IFR_TYPE_BUFFER || Value2->Type == EFI_IFR_TYPE_BUFFER ) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Both Operator should be type of Buffer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Len = Value1->BufferLen > Value2->BufferLen ? Value2->BufferLen : Value1->BufferLen;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *Result = CompareMem (Value1->Buffer, Value2->Buffer, Len);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((*Result == 0) && (Value1->BufferLen != Value2->BufferLen))
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // In this case, means base on samll number buffer, the data is same
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // So which value has more data, which value is bigger.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync *Result = Value1->BufferLen > Value2->BufferLen ? 1 : -1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Take remain types(integer, boolean, date/time) as integer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Temp64 = (INT64) (Value1->Value.u64 - Value2->Value.u64);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync } else if (Temp64 < 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Check if current user has the privilege specified by the permissions GUID.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param[in] Guid A GUID specifying setup access permissions.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval TRUE Current user has the privilege.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval FALSE Current user does not have the privilege.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /// If the system does not support user management, then it is assumed that
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /// all users have admin privilege and evaluation of each EFI_IFR_SECURITY
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /// op-code is always TRUE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = mUserManager->Current (mUserManager, &UserProfileHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /// Enumerate all user information of the current user profile
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /// to look for any EFI_USER_INFO_ACCESS_SETUP record.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = mUserManager->GetNextInfo (mUserManager, UserProfileHandle, &UserInfoHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = mUserManager->GetInfo (mUserManager, UserProfileHandle, UserInfoHandle, NULL, &UserInfoSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync UserInfo = (EFI_USER_INFO *) AllocatePool (UserInfoSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = mUserManager->GetInfo (mUserManager, UserProfileHandle, UserInfoHandle, UserInfo, &UserInfoSize);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync UserInfo->InfoType != EFI_USER_INFO_ACCESS_POLICY_RECORD ||
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync RemainSize = UserInfo->InfoSize - sizeof (EFI_USER_INFO);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AccessControl = (EFI_USER_INFO_ACCESS_CONTROL *)(UserInfo + 1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (RemainSize >= sizeof (EFI_USER_INFO_ACCESS_CONTROL)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (RemainSize < AccessControl->Size || AccessControl->Size < sizeof (EFI_USER_INFO_ACCESS_CONTROL)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (AccessControl->Type == EFI_USER_INFO_ACCESS_SETUP) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync /// Check if current user has the privilege specified by the permissions GUID.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync UserPermissionsGuid = (EFI_GUID *)(AccessControl + 1);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AccessControlDataSize = AccessControl->Size - sizeof (EFI_USER_INFO_ACCESS_CONTROL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (AccessControlDataSize >= sizeof (EFI_GUID)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync AccessControl = (EFI_USER_INFO_ACCESS_CONTROL *)((UINT8 *)AccessControl + AccessControl->Size);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Get question value from the predefined formset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param DevicePath The driver's device path which produece the formset data.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param InputHiiHandle The hii handle associate with the formset data.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSetGuid The formset guid which include the question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param QuestionId The question id which need to get value from.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Value The return data about question's value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval TRUE Get the question value success.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval FALSE Get the question value failed.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // The input parameter DevicePath or InputHiiHandle must have one valid input.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ASSERT ((DevicePath != NULL && InputHiiHandle == NULL) ||
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get HiiHandle.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 1. Get Driver handle.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (EFI_ERROR (Status) || (DriverHandle == NULL)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // 2. Get Hii handle
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index = 0; HiiHandles[Index] != NULL; Index++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!EFI_ERROR (Status) && (Handle == DriverHandle)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get the formset data include this question.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync FormSet = AllocateZeroPool (sizeof (FORM_BROWSER_FORMSET));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = InitializeFormSet(HiiHandle, FormSetGuid, FormSet, FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Base on the Question Id to get the question info.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion(FormSet, NULL, QuestionId);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Search form in the formset scope
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get the question value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = GetQuestionValue(FormSet, Form, Question, FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (Value, &Question->HiiValue, sizeof (EFI_HII_VALUE));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Clean the formset structure and restore the global parameter.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Evaluate the result of a HII expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync If Expression is NULL, then ASSERT.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet FormSet associated with this expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Form Form associated with this expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Expression Expression to be evaluated.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_SUCCESS The expression evaluated successfuly
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_NOT_FOUND The Question which referenced by a QuestionId
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync could not be found.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_ACCESS_DENIED The pop operation underflowed the stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EFI_INVALID_PARAMETER Syntax error with the Expression
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Save current stack offset.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StackOffset = SaveExpressionEvaluationStackOffset ();
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (!IsNull (&Expression->OpCodeListHead, Link)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Link = GetNextNode (&Expression->OpCodeListHead, Link);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Built-in functions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = CompareHiiValue (&Question->HiiValue, &OpCode->Value, &Result, NULL);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result == 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question2 = IdToQuestion (FormSet, Form, OpCode->QuestionId2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = CompareHiiValue (&Question->HiiValue, &Question2->HiiValue, &Result, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result == 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index =0; Index < OpCode->ListLength; Index++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Question->HiiValue.Value.u16 == OpCode->ValueList[Index]) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = CheckUserPrivilege (&OpCode->Guid);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get Value from VarStore buffer, EFI VarStore, Name/Value VarStore.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get value from Edit Buffer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (&Value->Value, OpCode->VarStorage->EditBuffer + OpCode->VarStoreInfo.VarOffset, OpCode->ValueWidth);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get value from string except for STRING value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = GetValueByName (OpCode->VarStorage, OpCode->ValueName, &StrPtr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (OpCode->ValueWidth >= ((TempLength + 1) / 2)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TempBuffer [Index/2] = (UINT8) ((DigitUint8 << 4) + TempBuffer [Index/2]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Get value from variable.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Not recognize storage.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // For Time/Date Data
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (OpCode->ValueType != EFI_IFR_TYPE_DATE && OpCode->ValueType != EFI_IFR_TYPE_TIME) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Only support Data/Time data when storage doesn't exist.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Invalid Date field.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Invalid Time field.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // EFI_IFR_QUESTION_REF3
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Validate the expression value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((Value->Type > EFI_IFR_TYPE_NUM_SIZE_64) || (Value->Value.u64 > 0xffff)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StrPtr = GetToken (OpCode->DevicePath, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!GetQuestionValueFromForm((EFI_DEVICE_PATH_PROTOCOL*)StrPtr, NULL, &OpCode->Guid, Value->Value.u16, &QuestionVal)){
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync } else if (CompareGuid (&OpCode->Guid, &gZeroGuid) != 0) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (!GetQuestionValueFromForm(NULL, FormSet->HiiHandle, &OpCode->Guid, Value->Value.u16, &QuestionVal)){
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion (FormSet, Form, Value->Value.u16);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // push the questions' value on to the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Find expression for this rule
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync RuleExpression = RuleIdToExpression (Form, OpCode->RuleId);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Evaluate this rule expression
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = EvaluateExpression (FormSet, Form, RuleExpression);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (EFI_ERROR (Status) || RuleExpression->Result.Type == EFI_IFR_TYPE_UNDEFINED) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Constant
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // unary-op
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (Value->Type != EFI_IFR_TYPE_STRING && Value->Type != EFI_IFR_TYPE_BUFFER) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StrPtr = GetToken (Value->Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Validate the expression value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((Value->Type > EFI_IFR_TYPE_NUM_SIZE_64) || (Value->Value.u64 > 0xffff)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Question = IdToQuestion (FormSet, Form, Value->Value.u16);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Validate the expression value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((Value->Type > EFI_IFR_TYPE_NUM_SIZE_64) || (Value->Value.u64 > 0xffff)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StrPtr = GetToken (Value->Value.u16, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // If String not exit, push an empty string
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.string = NewString (gEmptyString, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Convert an expression to a Boolean
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // When converting from an unsigned integer, zero will be converted to
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // FALSE and any other value will be converted to TRUE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) (Value->Value.u64 != 0);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // When converting from a string, if case-insensitive compare
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // with "true" is True, then push True. If a case-insensitive compare
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // with "false" is True, then push False. Otherwise, push Undefined.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StrPtr = GetToken (Value->Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // When converting from a buffer, if the buffer is all zeroes,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // then push False. Otherwise push True.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index =0; Index < Value->BufferLen; Index ++) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = IfrToString (FormSet, OpCode->Format, Value);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StrPtr = GetToken (Value->Value.string, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mUnicodeCollation->StrLwr (mUnicodeCollation, StrPtr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync mUnicodeCollation->StrUpr (mUnicodeCollation, StrPtr);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.string = NewString (StrPtr, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Set value to var storage buffer
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (OpCode->VarStorage->EditBuffer + OpCode->VarStoreInfo.VarOffset, &Value->Value, OpCode->ValueWidth);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync NameValue = AllocateZeroPool ((OpCode->ValueWidth * 2 + 1) * sizeof (CHAR16));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Convert Buffer to Hex String
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync TempBuffer = (UINT8 *) &Value->Value + OpCode->ValueWidth - 1;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync for (Index = 0; Index < OpCode->ValueWidth; Index ++, TempBuffer --) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync StrPtr += UnicodeValueToString (StrPtr, PREFIX_ZERO | RADIX_HEX, *TempBuffer, 2);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = SetValueByName (OpCode->VarStorage, OpCode->ValueName, NameValue, TRUE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Not recognize storage.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // For Time/Date Data
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (OpCode->ValueType != EFI_IFR_TYPE_DATE && OpCode->ValueType != EFI_IFR_TYPE_TIME) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Only support Data/Time data when storage doesn't exist.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Invalid Date field.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Invalid Time field.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // binary-op
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop an expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop another expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = Data1.Value.u64 + Data2.Value.u64;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = Data1.Value.u64 - Data2.Value.u64;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = MultU64x32 (Data1.Value.u64, (UINT32) Data2.Value.u64);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = DivU64x32 (Data1.Value.u64, (UINT32) Data2.Value.u64);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DivU64x32Remainder (Data1.Value.u64, (UINT32) Data2.Value.u64, &TempValue);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = Data1.Value.u64 & Data2.Value.u64;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = Data1.Value.u64 | Data2.Value.u64;
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = LShiftU64 (Data1.Value.u64, (UINTN) Data2.Value.u64);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.u64 = RShiftU64 (Data1.Value.u64, (UINTN) Data2.Value.u64);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Two Boolean operator
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop another expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) (Data1.Value.b && Data2.Value.b);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) (Data1.Value.b || Data2.Value.b);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Compare two integer, string, boolean or date/time
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop another expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = CompareHiiValue (&Data1, &Data2, &Result, FormSet->HiiHandle);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result == 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result != 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result >= 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result > 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result <= 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Value->Value.b = (BOOLEAN) ((Result < 0) ? TRUE : FALSE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // ternary-op
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop third expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop second expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop first expression from the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop the check value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check MapExpression list is valid.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (OpCode->MapExpressionList.ForwardLink == NULL) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Go through map expression list.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SubExpressionLink = GetFirstNode(&OpCode->MapExpressionList);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync while (!IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SubExpression = FORM_EXPRESSION_FROM_LINK (SubExpressionLink);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Evaluate the first expression in this pair.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = EvaluateExpression (FormSet, Form, SubExpression);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Compare the expression value with current value
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if ((CompareHiiValue (&Data1, &SubExpression->Result, &Result, NULL) == EFI_SUCCESS) && (Result == 0)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Try get the map value.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SubExpressionLink = GetNextNode (&OpCode->MapExpressionList, SubExpressionLink);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SubExpression = FORM_EXPRESSION_FROM_LINK (SubExpressionLink);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = EvaluateExpression (FormSet, Form, SubExpression);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Skip the second expression on this pair.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SubExpressionLink = GetNextNode (&OpCode->MapExpressionList, SubExpressionLink);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Goto the first expression on next pair.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync SubExpressionLink = GetNextNode (&OpCode->MapExpressionList, SubExpressionLink);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // No map value is found.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (EFI_ERROR (Status) || Value->Type == EFI_IFR_TYPE_UNDEFINED) {
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Pop the final result from expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // After evaluating an expression, there should be only one value left on the expression stack
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync RestoreExpressionEvaluationStackOffset (StackOffset);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync CopyMem (&Expression->Result, Value, sizeof (EFI_HII_VALUE));
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Return the result of the expression list. Check the expression list and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync return the highest priority express result.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Priority: DisableIf > SuppressIf > GrayOutIf > FALSE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param ExpList The input expression list.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Evaluate Whether need to evaluate the expression first.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param FormSet FormSet associated with this expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @param Form Form associated with this expression.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync @retval EXPRESS_RESULT Return the higher priority express result.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync DisableIf > SuppressIf > GrayOutIf > FALSE
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync ASSERT(ExpList->Signature == FORM_EXPRESSION_LIST_SIGNATURE);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Check whether need to evaluate the expression first.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Status = EvaluateExpression (FormSet, Form, ExpList->Expression[Index++]);
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync // Run the list of expressions.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync if (ExpList->Expression[Index]->Result.Type == EFI_IFR_TYPE_BOOLEAN &&