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audk/MdeModulePkg/Universal/SetupBrowserDxe/Expression.c

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/** @file
Utility functions for expression evaluation.
Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Setup.h"
//
// Global stack used to evaluate boolean expresions
//
EFI_HII_VALUE *mOpCodeScopeStack = NULL;
EFI_HII_VALUE *mOpCodeScopeStackEnd = NULL;
EFI_HII_VALUE *mOpCodeScopeStackPointer = NULL;
EFI_HII_VALUE *mExpressionEvaluationStack = NULL;
EFI_HII_VALUE *mExpressionEvaluationStackEnd = NULL;
EFI_HII_VALUE *mExpressionEvaluationStackPointer = NULL;
UINTN mExpressionEvaluationStackOffset = 0;
EFI_HII_VALUE *mCurrentExpressionStack = NULL;
EFI_HII_VALUE *mCurrentExpressionEnd = NULL;
EFI_HII_VALUE *mCurrentExpressionPointer = NULL;
EFI_HII_VALUE *mMapExpressionListStack = NULL;
EFI_HII_VALUE *mMapExpressionListEnd = NULL;
EFI_HII_VALUE *mMapExpressionListPointer = NULL;
FORM_EXPRESSION **mFormExpressionStack = NULL;
FORM_EXPRESSION **mFormExpressionEnd = NULL;
FORM_EXPRESSION **mFormExpressionPointer = NULL;
FORM_EXPRESSION **mStatementExpressionStack = NULL;
FORM_EXPRESSION **mStatementExpressionEnd = NULL;
FORM_EXPRESSION **mStatementExpressionPointer = NULL;
FORM_EXPRESSION **mOptionExpressionStack = NULL;
FORM_EXPRESSION **mOptionExpressionEnd = NULL;
FORM_EXPRESSION **mOptionExpressionPointer = NULL;
//
// Unicode collation protocol interface
//
EFI_UNICODE_COLLATION_PROTOCOL *mUnicodeCollation = NULL;
EFI_USER_MANAGER_PROTOCOL *mUserManager = NULL;
/**
Grow size of the stack.
This is an internal function.
@param Stack On input: old stack; On output: new stack
@param StackPtr On input: old stack pointer; On output: new stack
pointer
@param StackEnd On input: old stack end; On output: new stack end
@retval EFI_SUCCESS Grow stack success.
@retval EFI_OUT_OF_RESOURCES No enough memory for stack space.
**/
EFI_STATUS
GrowStack (
IN OUT EFI_HII_VALUE **Stack,
IN OUT EFI_HII_VALUE **StackPtr,
IN OUT EFI_HII_VALUE **StackEnd
)
{
UINTN Size;
EFI_HII_VALUE *NewStack;
Size = EXPRESSION_STACK_SIZE_INCREMENT;
if (*StackPtr != NULL) {
Size = Size + (*StackEnd - *Stack);
}
NewStack = AllocatePool (Size * sizeof (EFI_HII_VALUE));
if (NewStack == NULL) {
return EFI_OUT_OF_RESOURCES;
}
if (*StackPtr != NULL) {
//
// Copy from Old Stack to the New Stack
//
CopyMem (
NewStack,
*Stack,
(*StackEnd - *Stack) * sizeof (EFI_HII_VALUE)
);
//
// Free The Old Stack
//
FreePool (*Stack);
}
//
// Make the Stack pointer point to the old data in the new stack
//
*StackPtr = NewStack + (*StackPtr - *Stack);
*Stack = NewStack;
*StackEnd = NewStack + Size;
return EFI_SUCCESS;
}
/**
Push an element onto the Boolean Stack.
@param Stack On input: old stack; On output: new stack
@param StackPtr On input: old stack pointer; On output: new stack
pointer
@param StackEnd On input: old stack end; On output: new stack end
@param Data Data to push.
@retval EFI_SUCCESS Push stack success.
**/
EFI_STATUS
PushStack (
IN OUT EFI_HII_VALUE **Stack,
IN OUT EFI_HII_VALUE **StackPtr,
IN OUT EFI_HII_VALUE **StackEnd,
IN EFI_HII_VALUE *Data
)
{
EFI_STATUS Status;
//
// Check for a stack overflow condition
//
if (*StackPtr >= *StackEnd) {
//
// Grow the stack
//
Status = GrowStack (Stack, StackPtr, StackEnd);
if (EFI_ERROR (Status)) {
return Status;
}
}
//
// Push the item onto the stack
//
CopyMem (*StackPtr, Data, sizeof (EFI_HII_VALUE));
if (Data->Type == EFI_IFR_TYPE_BUFFER) {
(*StackPtr)->Buffer = AllocateCopyPool(Data->BufferLen, Data->Buffer);
ASSERT ((*StackPtr)->Buffer != NULL);
}
*StackPtr = *StackPtr + 1;
return EFI_SUCCESS;
}
/**
Pop an element from the stack.
@param Stack On input: old stack
@param StackPtr On input: old stack pointer; On output: new stack pointer
@param Data Data to pop.
@retval EFI_SUCCESS The value was popped onto the stack.
@retval EFI_ACCESS_DENIED The pop operation underflowed the stack
**/
EFI_STATUS
PopStack (
IN EFI_HII_VALUE *Stack,
IN OUT EFI_HII_VALUE **StackPtr,
OUT EFI_HII_VALUE *Data
)
{
//
// Check for a stack underflow condition
//
if (*StackPtr == Stack) {
return EFI_ACCESS_DENIED;
}
//
// Pop the item off the stack
//
*StackPtr = *StackPtr - 1;
CopyMem (Data, *StackPtr, sizeof (EFI_HII_VALUE));
return EFI_SUCCESS;
}
/**
Reset stack pointer to begin of the stack.
**/
VOID
ResetCurrentExpressionStack (
VOID
)
{
mCurrentExpressionPointer = mCurrentExpressionStack;
mFormExpressionPointer = mFormExpressionStack;
mStatementExpressionPointer = mStatementExpressionStack;
mOptionExpressionPointer = mOptionExpressionStack;
}
/**
Push current expression onto the Stack
@param Pointer Pointer to current expression.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
**/
EFI_STATUS
PushCurrentExpression (
IN VOID *Pointer
)
{
EFI_HII_VALUE Data;
Data.Type = EFI_IFR_TYPE_NUM_SIZE_64;
Data.Value.u64 = (UINT64) (UINTN) Pointer;
return PushStack (
&mCurrentExpressionStack,
&mCurrentExpressionPointer,
&mCurrentExpressionEnd,
&Data
);
}
/**
Pop current expression from the Stack
@param Pointer Pointer to current expression to be pop.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
**/
EFI_STATUS
PopCurrentExpression (
OUT VOID **Pointer
)
{
EFI_STATUS Status;
EFI_HII_VALUE Data;
Status = PopStack (
mCurrentExpressionStack,
&mCurrentExpressionPointer,
&Data
);
*Pointer = (VOID *) (UINTN) Data.Value.u64;
return Status;
}
/**
Reset stack pointer to begin of the stack.
**/
VOID
ResetMapExpressionListStack (
VOID
)
{
mMapExpressionListPointer = mMapExpressionListStack;
}
/**
Grow size of the stack.
This is an internal function.
@param Stack On input: old stack; On output: new stack
@param StackPtr On input: old stack pointer; On output: new stack
pointer
@param StackEnd On input: old stack end; On output: new stack end
@param MemberSize The stack member size.
@retval EFI_SUCCESS Grow stack success.
@retval EFI_OUT_OF_RESOURCES No enough memory for stack space.
**/
EFI_STATUS
GrowConditionalStack (
IN OUT FORM_EXPRESSION ***Stack,
IN OUT FORM_EXPRESSION ***StackPtr,
IN OUT FORM_EXPRESSION ***StackEnd,
IN UINTN MemberSize
)
{
UINTN Size;
FORM_EXPRESSION **NewStack;
Size = EXPRESSION_STACK_SIZE_INCREMENT;
if (*StackPtr != NULL) {
Size = Size + (*StackEnd - *Stack);
}
NewStack = AllocatePool (Size * MemberSize);
if (NewStack == NULL) {
return EFI_OUT_OF_RESOURCES;
}
if (*StackPtr != NULL) {
//
// Copy from Old Stack to the New Stack
//
CopyMem (
NewStack,
*Stack,
(*StackEnd - *Stack) * MemberSize
);
//
// Free The Old Stack
//
FreePool (*Stack);
}
//
// Make the Stack pointer point to the old data in the new stack
//
*StackPtr = NewStack + (*StackPtr - *Stack);
*Stack = NewStack;
*StackEnd = NewStack + Size;
return EFI_SUCCESS;
}
/**
Push an element onto the Stack.
@param Stack On input: old stack; On output: new stack
@param StackPtr On input: old stack pointer; On output: new stack
pointer
@param StackEnd On input: old stack end; On output: new stack end
@param Data Data to push.
@retval EFI_SUCCESS Push stack success.
**/
EFI_STATUS
PushConditionalStack (
IN OUT FORM_EXPRESSION ***Stack,
IN OUT FORM_EXPRESSION ***StackPtr,
IN OUT FORM_EXPRESSION ***StackEnd,
IN FORM_EXPRESSION **Data
)
{
EFI_STATUS Status;
//
// Check for a stack overflow condition
//
if (*StackPtr >= *StackEnd) {
//
// Grow the stack
//
Status = GrowConditionalStack (Stack, StackPtr, StackEnd, sizeof (FORM_EXPRESSION *));
if (EFI_ERROR (Status)) {
return Status;
}
}
//
// Push the item onto the stack
//
CopyMem (*StackPtr, Data, sizeof (FORM_EXPRESSION *));
*StackPtr = *StackPtr + 1;
return EFI_SUCCESS;
}
/**
Pop an element from the stack.
@param Stack On input: old stack
@param StackPtr On input: old stack pointer; On output: new stack pointer
@param Data Data to pop.
@retval EFI_SUCCESS The value was popped onto the stack.
@retval EFI_ACCESS_DENIED The pop operation underflowed the stack
**/
EFI_STATUS
PopConditionalStack (
IN FORM_EXPRESSION **Stack,
IN OUT FORM_EXPRESSION ***StackPtr,
OUT FORM_EXPRESSION **Data
)
{
//
// Check for a stack underflow condition
//
if (*StackPtr == Stack) {
return EFI_ACCESS_DENIED;
}
//
// Pop the item off the stack
//
*StackPtr = *StackPtr - 1;
CopyMem (Data, *StackPtr, sizeof (FORM_EXPRESSION *));
return EFI_SUCCESS;
}
/**
Get the expression list count.
@param Level Which type this expression belong to. Form,
statement or option?
@retval >=0 The expression count
@retval -1 Input parameter error.
**/
INTN
GetConditionalExpressionCount (
IN EXPRESS_LEVEL Level
)
{
switch (Level) {
case ExpressForm:
return mFormExpressionPointer - mFormExpressionStack;
case ExpressStatement:
return mStatementExpressionPointer - mStatementExpressionStack;
case ExpressOption:
return mOptionExpressionPointer - mOptionExpressionStack;
default:
ASSERT (FALSE);
return -1;
}
}
/**
Get the expression Buffer pointer.
@param Level Which type this expression belong to. Form,
statement or option?
@retval The start pointer of the expression buffer or NULL.
**/
FORM_EXPRESSION **
GetConditionalExpressionList (
IN EXPRESS_LEVEL Level
)
{
switch (Level) {
case ExpressForm:
return mFormExpressionStack;
case ExpressStatement:
return mStatementExpressionStack;
case ExpressOption:
return mOptionExpressionStack;
default:
ASSERT (FALSE);
return NULL;
}
}
/**
Push the expression options onto the Stack.
@param Pointer Pointer to the current expression.
@param Level Which type this expression belong to. Form,
statement or option?
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
**/
EFI_STATUS
PushConditionalExpression (
IN FORM_EXPRESSION *Pointer,
IN EXPRESS_LEVEL Level
)
{
switch (Level) {
case ExpressForm:
return PushConditionalStack (
&mFormExpressionStack,
&mFormExpressionPointer,
&mFormExpressionEnd,
&Pointer
);
case ExpressStatement:
return PushConditionalStack (
&mStatementExpressionStack,
&mStatementExpressionPointer,
&mStatementExpressionEnd,
&Pointer
);
case ExpressOption:
return PushConditionalStack (
&mOptionExpressionStack,
&mOptionExpressionPointer,
&mOptionExpressionEnd,
&Pointer
);
default:
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
}
/**
Pop the expression options from the Stack
@param Level Which type this expression belong to. Form,
statement or option?
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
**/
EFI_STATUS
PopConditionalExpression (
IN EXPRESS_LEVEL Level
)
{
FORM_EXPRESSION *Pointer;
switch (Level) {
case ExpressForm:
return PopConditionalStack (
mFormExpressionStack,
&mFormExpressionPointer,
&Pointer
);
case ExpressStatement:
return PopConditionalStack (
mStatementExpressionStack,
&mStatementExpressionPointer,
&Pointer
);
case ExpressOption:
return PopConditionalStack (
mOptionExpressionStack,
&mOptionExpressionPointer,
&Pointer
);
default:
ASSERT (FALSE);
return EFI_INVALID_PARAMETER;
}
}
/**
Push the list of map expression onto the Stack
@param Pointer Pointer to the list of map expression to be pushed.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
**/
EFI_STATUS
PushMapExpressionList (
IN VOID *Pointer
)
{
EFI_HII_VALUE Data;
Data.Type = EFI_IFR_TYPE_NUM_SIZE_64;
Data.Value.u64 = (UINT64) (UINTN) Pointer;
return PushStack (
&mMapExpressionListStack,
&mMapExpressionListPointer,
&mMapExpressionListEnd,
&Data
);
}
/**
Pop the list of map expression from the Stack
@param Pointer Pointer to the list of map expression to be pop.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the stack.
**/
EFI_STATUS
PopMapExpressionList (
OUT VOID **Pointer
)
{
EFI_STATUS Status;
EFI_HII_VALUE Data;
Status = PopStack (
mMapExpressionListStack,
&mMapExpressionListPointer,
&Data
);
*Pointer = (VOID *) (UINTN) Data.Value.u64;
return Status;
}
/**
Reset stack pointer to begin of the stack.
**/
VOID
ResetScopeStack (
VOID
)
{
mOpCodeScopeStackPointer = mOpCodeScopeStack;
}
/**
Push an Operand onto the Stack
@param Operand Operand to push.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
stack.
**/
EFI_STATUS
PushScope (
IN UINT8 Operand
)
{
EFI_HII_VALUE Data;
Data.Type = EFI_IFR_TYPE_NUM_SIZE_8;
Data.Value.u8 = Operand;
return PushStack (
&mOpCodeScopeStack,
&mOpCodeScopeStackPointer,
&mOpCodeScopeStackEnd,
&Data
);
}
/**
Pop an Operand from the Stack
@param Operand Operand to pop.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
stack.
**/
EFI_STATUS
PopScope (
OUT UINT8 *Operand
)
{
EFI_STATUS Status;
EFI_HII_VALUE Data;
Status = PopStack (
mOpCodeScopeStack,
&mOpCodeScopeStackPointer,
&Data
);
*Operand = Data.Value.u8;
return Status;
}
/**
Push an Expression value onto the Stack
@param Value Expression value to push.
@retval EFI_SUCCESS The value was pushed onto the stack.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
stack.
**/
EFI_STATUS
PushExpression (
IN EFI_HII_VALUE *Value
)
{
return PushStack (
&mExpressionEvaluationStack,
&mExpressionEvaluationStackPointer,
&mExpressionEvaluationStackEnd,
Value
);
}
/**
Pop an Expression value from the stack.
@param Value Expression value to pop.
@retval EFI_SUCCESS The value was popped onto the stack.
@retval EFI_ACCESS_DENIED The pop operation underflowed the stack
**/
EFI_STATUS
PopExpression (
OUT EFI_HII_VALUE *Value
)
{
return PopStack (
mExpressionEvaluationStack + mExpressionEvaluationStackOffset,
&mExpressionEvaluationStackPointer,
Value
);
}
/**
Get current stack offset from stack start.
@return Stack offset to stack start.
**/
UINTN
SaveExpressionEvaluationStackOffset (
VOID
)
{
UINTN TempStackOffset;
TempStackOffset = mExpressionEvaluationStackOffset;
mExpressionEvaluationStackOffset = mExpressionEvaluationStackPointer - mExpressionEvaluationStack;
return TempStackOffset;
}
/**
Restore stack offset based on input stack offset
@param StackOffset Offset to stack start.
**/
VOID
RestoreExpressionEvaluationStackOffset (
UINTN StackOffset
)
{
mExpressionEvaluationStackOffset = StackOffset;
}
/**
Get Form given its FormId.
@param FormSet The formset which contains this form.
@param FormId Id of this form.
@retval Pointer The form.
@retval NULL Specified Form is not found in the formset.
**/
FORM_BROWSER_FORM *
IdToForm (
IN FORM_BROWSER_FORMSET *FormSet,
IN UINT16 FormId
)
{
LIST_ENTRY *Link;
FORM_BROWSER_FORM *Form;
Link = GetFirstNode (&FormSet->FormListHead);
while (!IsNull (&FormSet->FormListHead, Link)) {
Form = FORM_BROWSER_FORM_FROM_LINK (Link);
if (Form->FormId == FormId) {
return Form;
}
Link = GetNextNode (&FormSet->FormListHead, Link);
}
return NULL;
}
/**
Search a Question in Form scope using its QuestionId.
@param Form The form which contains this Question.
@param QuestionId Id of this Question.
@retval Pointer The Question.
@retval NULL Specified Question not found in the form.
**/
FORM_BROWSER_STATEMENT *
IdToQuestion2 (
IN FORM_BROWSER_FORM *Form,
IN UINT16 QuestionId
)
{
LIST_ENTRY *Link;
FORM_BROWSER_STATEMENT *Question;
if (QuestionId == 0 || Form == NULL) {
//
// The value of zero is reserved
//
return NULL;
}
Link = GetFirstNode (&Form->StatementListHead);
while (!IsNull (&Form->StatementListHead, Link)) {
Question = FORM_BROWSER_STATEMENT_FROM_LINK (Link);
if (Question->QuestionId == QuestionId) {
return Question;
}
Link = GetNextNode (&Form->StatementListHead, Link);
}
return NULL;
}
/**
Search a Question in Formset scope using its QuestionId.
@param FormSet The formset which contains this form.
@param Form The form which contains this Question.
@param QuestionId Id of this Question.
@retval Pointer The Question.
@retval NULL Specified Question not found in the form.
**/
FORM_BROWSER_STATEMENT *
IdToQuestion (
IN FORM_BROWSER_FORMSET *FormSet,
IN FORM_BROWSER_FORM *Form,
IN UINT16 QuestionId
)
{
LIST_ENTRY *Link;
FORM_BROWSER_STATEMENT *Question;
//
// Search in the form scope first
//
Question = IdToQuestion2 (Form, QuestionId);
if (Question != NULL) {
return Question;
}
//
// Search in the formset scope
//
Link = GetFirstNode (&FormSet->FormListHead);
while (!IsNull (&FormSet->FormListHead, Link)) {
Form = FORM_BROWSER_FORM_FROM_LINK (Link);
Question = IdToQuestion2 (Form, QuestionId);
if (Question != NULL) {
//
// EFI variable storage may be updated by Callback() asynchronous,
// to keep synchronous, always reload the Question Value.
//
if (Question->Storage->Type == EFI_HII_VARSTORE_EFI_VARIABLE) {
GetQuestionValue (FormSet, Form, Question, GetSetValueWithHiiDriver);
}
return Question;
}
Link = GetNextNode (&FormSet->FormListHead, Link);
}
return NULL;
}
/**
Get Expression given its RuleId.
@param Form The form which contains this Expression.
@param RuleId Id of this Expression.
@retval Pointer The Expression.
@retval NULL Specified Expression not found in the form.
**/
FORM_EXPRESSION *
RuleIdToExpression (
IN FORM_BROWSER_FORM *Form,
IN UINT8 RuleId
)
{
LIST_ENTRY *Link;
FORM_EXPRESSION *Expression;
Link = GetFirstNode (&Form->ExpressionListHead);
while (!IsNull (&Form->ExpressionListHead, Link)) {
Expression = FORM_EXPRESSION_FROM_LINK (Link);
if (Expression->Type == EFI_HII_EXPRESSION_RULE && Expression->RuleId == RuleId) {
return Expression;
}
Link = GetNextNode (&Form->ExpressionListHead, Link);
}
return NULL;
}
/**
Locate the Unicode Collation Protocol interface for later use.
@retval EFI_SUCCESS Protocol interface initialize success.
@retval Other Protocol interface initialize failed.
**/
EFI_STATUS
InitializeUnicodeCollationProtocol (
VOID
)
{
EFI_STATUS Status;
if (mUnicodeCollation != NULL) {
return EFI_SUCCESS;
}
//
// BUGBUG: Proper impelmentation is to locate all Unicode Collation Protocol
// instances first and then select one which support English language.
// Current implementation just pick the first instance.
//
Status = gBS->LocateProtocol (
&gEfiUnicodeCollation2ProtocolGuid,
NULL,
(VOID **) &mUnicodeCollation
);
return Status;
}
/**
Convert the input Unicode character to upper.
@param String Th Unicode character to be converted.
**/
VOID
IfrStrToUpper (
IN CHAR16 *String
)
{
while (*String != 0) {
if ((*String >= 'a') && (*String <= 'z')) {
*String = (UINT16) ((*String) & ((UINT16) ~0x20));
}
String++;
}
}
/**
Check whether this value type can be transfer to EFI_IFR_TYPE_BUFFER type.
EFI_IFR_TYPE_REF, EFI_IFR_TYPE_DATE and EFI_IFR_TYPE_TIME are converted to
EFI_IFR_TYPE_BUFFER when do the value compare.
@param Value Expression value to compare on.
@retval TRUE This value type can be transter to EFI_IFR_TYPE_BUFFER type.
@retval FALSE This value type can't be transter to EFI_IFR_TYPE_BUFFER type.
**/
BOOLEAN
IsTypeInBuffer (
IN EFI_HII_VALUE *Value
)
{
switch (Value->Type) {
case EFI_IFR_TYPE_BUFFER:
case EFI_IFR_TYPE_DATE:
case EFI_IFR_TYPE_TIME:
case EFI_IFR_TYPE_REF:
return TRUE;
default:
return FALSE;
}
}
/**
Check whether this value type can be transfer to EFI_IFR_TYPE_UINT64
@param Value Expression value to compare on.
@retval TRUE This value type can be transter to EFI_IFR_TYPE_BUFFER type.
@retval FALSE This value type can't be transter to EFI_IFR_TYPE_BUFFER type.
**/
BOOLEAN
IsTypeInUINT64 (
IN EFI_HII_VALUE *Value
)
{
switch (Value->Type) {
case EFI_IFR_TYPE_NUM_SIZE_8:
case EFI_IFR_TYPE_NUM_SIZE_16:
case EFI_IFR_TYPE_NUM_SIZE_32:
case EFI_IFR_TYPE_NUM_SIZE_64:
case EFI_IFR_TYPE_BOOLEAN:
return TRUE;
default:
return FALSE;
}
}
/**
Return the buffer length for this value.
EFI_IFR_TYPE_REF, EFI_IFR_TYPE_DATE and EFI_IFR_TYPE_TIME are converted to
EFI_IFR_TYPE_BUFFER when do the value compare.
@param Value Expression value to compare on.
@retval BufLen Return the buffer length.
**/
UINT16
GetLengthForValue (
IN EFI_HII_VALUE *Value
)
{
switch (Value->Type) {
case EFI_IFR_TYPE_BUFFER:
return Value->BufferLen;
case EFI_IFR_TYPE_DATE:
return (UINT16) sizeof (EFI_HII_DATE);
case EFI_IFR_TYPE_TIME:
return (UINT16) sizeof (EFI_HII_TIME);
case EFI_IFR_TYPE_REF:
return (UINT16) sizeof (EFI_HII_REF);
default:
return 0;
}
}
/**
Return the buffer pointer for this value.
EFI_IFR_TYPE_REF, EFI_IFR_TYPE_DATE and EFI_IFR_TYPE_TIME are converted to
EFI_IFR_TYPE_BUFFER when do the value compare.
@param Value Expression value to compare on.
@retval Buf Return the buffer pointer.
**/
UINT8 *
GetBufferForValue (
IN EFI_HII_VALUE *Value
)
{
switch (Value->Type) {
case EFI_IFR_TYPE_BUFFER:
return Value->Buffer;
case EFI_IFR_TYPE_DATE:
return (UINT8 *) (&Value->Value.date);
case EFI_IFR_TYPE_TIME:
return (UINT8 *) (&Value->Value.time);
case EFI_IFR_TYPE_REF:
return (UINT8 *) (&Value->Value.ref);
default:
return NULL;
}
}
/**
Evaluate opcode EFI_IFR_TO_STRING.
@param FormSet Formset which contains this opcode.
@param Format String format in EFI_IFR_TO_STRING.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrToString (
IN FORM_BROWSER_FORMSET *FormSet,
IN UINT8 Format,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value;
CHAR16 *String;
CHAR16 *PrintFormat;
CHAR16 Buffer[MAXIMUM_VALUE_CHARACTERS];
UINT8 *TmpBuf;
UINT8 *SrcBuf;
UINTN SrcLen;
UINTN BufferSize;
Status = PopExpression (&Value);
if (EFI_ERROR (Status)) {
return Status;
}
switch (Value.Type) {
case EFI_IFR_TYPE_NUM_SIZE_8:
case EFI_IFR_TYPE_NUM_SIZE_16:
case EFI_IFR_TYPE_NUM_SIZE_32:
case EFI_IFR_TYPE_NUM_SIZE_64:
BufferSize = MAXIMUM_VALUE_CHARACTERS * sizeof (CHAR16);
switch (Format) {
case EFI_IFR_STRING_UNSIGNED_DEC:
case EFI_IFR_STRING_SIGNED_DEC:
PrintFormat = L"%ld";
break;
case EFI_IFR_STRING_LOWERCASE_HEX:
PrintFormat = L"%lx";
break;
case EFI_IFR_STRING_UPPERCASE_HEX:
PrintFormat = L"%lX";
break;
default:
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
UnicodeSPrint (Buffer, BufferSize, PrintFormat, Value.Value.u64);
String = Buffer;
break;
case EFI_IFR_TYPE_STRING:
CopyMem (Result, &Value, sizeof (EFI_HII_VALUE));
return EFI_SUCCESS;
case EFI_IFR_TYPE_BOOLEAN:
String = (Value.Value.b) ? L"True" : L"False";
break;
case EFI_IFR_TYPE_BUFFER:
case EFI_IFR_TYPE_DATE:
case EFI_IFR_TYPE_TIME:
case EFI_IFR_TYPE_REF:
//
// + 3 is base on the unicode format, the length may be odd number,
// so need 1 byte to align, also need 2 bytes for L'\0'.
//
if (Value.Type == EFI_IFR_TYPE_BUFFER) {
SrcLen = Value.BufferLen;
SrcBuf = Value.Buffer;
} else {
SrcBuf = GetBufferForValue(&Value);
SrcLen = GetLengthForValue(&Value);
}
TmpBuf = AllocateZeroPool (SrcLen + 3);
ASSERT (TmpBuf != NULL);
if (Format == EFI_IFR_STRING_ASCII) {
CopyMem (TmpBuf, SrcBuf, SrcLen);
PrintFormat = L"%a";
} else {
// Format == EFI_IFR_STRING_UNICODE
CopyMem (TmpBuf, SrcBuf, SrcLen * sizeof (CHAR16));
PrintFormat = L"%s";
}
UnicodeSPrint (Buffer, sizeof (Buffer), PrintFormat, TmpBuf);
String = Buffer;
FreePool (TmpBuf);
if (Value.Type == EFI_IFR_TYPE_BUFFER) {
FreePool (Value.Buffer);
}
break;
default:
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Result->Type = EFI_IFR_TYPE_STRING;
Result->Value.string = NewString (String, FormSet->HiiHandle);
return EFI_SUCCESS;
}
/**
Evaluate opcode EFI_IFR_TO_UINT.
@param FormSet Formset which contains this opcode.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrToUint (
IN FORM_BROWSER_FORMSET *FormSet,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value;
CHAR16 *String;
CHAR16 *StringPtr;
Status = PopExpression (&Value);
if (EFI_ERROR (Status)) {
return Status;
}
if (Value.Type >= EFI_IFR_TYPE_OTHER && !IsTypeInBuffer(&Value)) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Status = EFI_SUCCESS;
if (Value.Type == EFI_IFR_TYPE_STRING) {
String = GetToken (Value.Value.string, FormSet->HiiHandle);
if (String == NULL) {
return EFI_NOT_FOUND;
}
IfrStrToUpper (String);
StringPtr = StrStr (String, L"0X");
if (StringPtr != NULL) {
//
// Hex string
//
Result->Value.u64 = StrHexToUint64 (String);
} else {
//
// decimal string
//
Result->Value.u64 = StrDecimalToUint64 (String);
}
FreePool (String);
} else if (IsTypeInBuffer(&Value)) {
if (GetLengthForValue (&Value) > 8) {
if (Value.Type == EFI_IFR_TYPE_BUFFER) {
FreePool (Value.Buffer);
}
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Result->Value.u64 = *(UINT64*) GetBufferForValue (&Value);
if (Value.Type == EFI_IFR_TYPE_BUFFER) {
FreePool (Value.Buffer);
}
} else {
CopyMem (Result, &Value, sizeof (EFI_HII_VALUE));
}
Result->Type = EFI_IFR_TYPE_NUM_SIZE_64;
return Status;
}
/**
Evaluate opcode EFI_IFR_CATENATE.
@param FormSet Formset which contains this opcode.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrCatenate (
IN FORM_BROWSER_FORMSET *FormSet,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[2];
CHAR16 *String[2];
UINTN Index;
CHAR16 *StringPtr;
UINTN Size;
UINT16 Length0;
UINT16 Length1;
UINT8 *TmpBuf;
UINTN MaxLen;
//
// String[0] - The second string
// String[1] - The first string
//
String[0] = NULL;
String[1] = NULL;
StringPtr = NULL;
Status = EFI_SUCCESS;
ZeroMem (Value, sizeof (Value));
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
goto Done;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
goto Done;
}
for (Index = 0; Index < 2; Index++) {
if (Value[Index].Type != EFI_IFR_TYPE_STRING && !IsTypeInBuffer(&Value[Index])) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
if (Value[Index].Type == EFI_IFR_TYPE_STRING) {
String[Index] = GetToken (Value[Index].Value.string, FormSet->HiiHandle);
if (String[Index] == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
}
}
if (Value[0].Type == EFI_IFR_TYPE_STRING) {
Size = StrSize (String[0]);
MaxLen = (StrSize (String[1]) + Size) / sizeof (CHAR16);
StringPtr= AllocatePool (MaxLen * sizeof (CHAR16));
ASSERT (StringPtr != NULL);
StrCpyS (StringPtr, MaxLen, String[1]);
StrCatS (StringPtr, MaxLen, String[0]);
Result->Type = EFI_IFR_TYPE_STRING;
Result->Value.string = NewString (StringPtr, FormSet->HiiHandle);
} else {
Result->Type = EFI_IFR_TYPE_BUFFER;
Length0 = GetLengthForValue(&Value[0]);
Length1 = GetLengthForValue(&Value[1]);
Result->BufferLen = (UINT16) (Length0 + Length1);
Result->Buffer = AllocateZeroPool (Result->BufferLen);
ASSERT (Result->Buffer != NULL);
TmpBuf = GetBufferForValue(&Value[0]);
ASSERT (TmpBuf != NULL);
CopyMem (Result->Buffer, TmpBuf, Length0);
TmpBuf = GetBufferForValue(&Value[1]);
ASSERT (TmpBuf != NULL);
CopyMem (&Result->Buffer[Length0], TmpBuf, Length1);
}
Done:
if (Value[0].Buffer != NULL) {
FreePool (Value[0].Buffer);
}
if (Value[1].Buffer != NULL) {
FreePool (Value[1].Buffer);
}
if (String[0] != NULL) {
FreePool (String[0]);
}
if (String[1] != NULL) {
FreePool (String[1]);
}
if (StringPtr != NULL) {
FreePool (StringPtr);
}
return Status;
}
/**
Evaluate opcode EFI_IFR_MATCH.
@param FormSet Formset which contains this opcode.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrMatch (
IN FORM_BROWSER_FORMSET *FormSet,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[2];
CHAR16 *String[2];
UINTN Index;
//
// String[0] - The string to search
// String[1] - pattern
//
String[0] = NULL;
String[1] = NULL;
Status = EFI_SUCCESS;
ZeroMem (Value, sizeof (Value));
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
goto Done;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
goto Done;
}
for (Index = 0; Index < 2; Index++) {
if (Value[Index].Type != EFI_IFR_TYPE_STRING) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
String[Index] = GetToken (Value[Index].Value.string, FormSet->HiiHandle);
if (String [Index] == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
}
Result->Type = EFI_IFR_TYPE_BOOLEAN;
Result->Value.b = mUnicodeCollation->MetaiMatch (mUnicodeCollation, String[0], String[1]);
Done:
if (String[0] != NULL) {
FreePool (String[0]);
}
if (String[1] != NULL) {
FreePool (String[1]);
}
return Status;
}
/**
Evaluate opcode EFI_IFR_MATCH2.
@param FormSet Formset which contains this opcode.
@param SyntaxType Syntax type for match2.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrMatch2 (
IN FORM_BROWSER_FORMSET *FormSet,
IN EFI_GUID *SyntaxType,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[2];
CHAR16 *String[2];
UINTN Index;
UINTN GuidIndex;
EFI_HANDLE *HandleBuffer;
UINTN BufferSize;
EFI_REGULAR_EXPRESSION_PROTOCOL *RegularExpressionProtocol;
UINTN RegExSyntaxTypeListSize;
EFI_REGEX_SYNTAX_TYPE *RegExSyntaxTypeList;
UINTN CapturesCount;
//
// String[0] - The string to search
// String[1] - pattern
//
String[0] = NULL;
String[1] = NULL;
HandleBuffer = NULL;
RegExSyntaxTypeList = NULL;
Status = EFI_SUCCESS;
ZeroMem (Value, sizeof (Value));
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
goto Done;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
goto Done;
}
for (Index = 0; Index < 2; Index++) {
if (Value[Index].Type != EFI_IFR_TYPE_STRING) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
String[Index] = GetToken (Value[Index].Value.string, FormSet->HiiHandle);
if (String [Index] == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
}
BufferSize = 0;
HandleBuffer = NULL;
Status = gBS->LocateHandle(
ByProtocol,
&gEfiRegularExpressionProtocolGuid,
NULL,
&BufferSize,
HandleBuffer);
if (Status == EFI_BUFFER_TOO_SMALL) {
HandleBuffer = AllocateZeroPool(BufferSize);
if (HandleBuffer == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
Status = gBS->LocateHandle(
ByProtocol,
&gEfiRegularExpressionProtocolGuid,
NULL,
&BufferSize,
HandleBuffer);
}
if (EFI_ERROR (Status)) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
ASSERT (HandleBuffer != NULL);
for ( Index = 0; Index < BufferSize / sizeof(EFI_HANDLE); Index ++) {
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiRegularExpressionProtocolGuid,
(VOID**)&RegularExpressionProtocol
);
if (EFI_ERROR (Status)) {
goto Done;
}
RegExSyntaxTypeListSize = 0;
RegExSyntaxTypeList = NULL;
Status = RegularExpressionProtocol->GetInfo (
RegularExpressionProtocol,
&RegExSyntaxTypeListSize,
RegExSyntaxTypeList
);
if (Status == EFI_BUFFER_TOO_SMALL) {
RegExSyntaxTypeList = AllocateZeroPool(RegExSyntaxTypeListSize);
if (RegExSyntaxTypeList == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
Status = RegularExpressionProtocol->GetInfo (
RegularExpressionProtocol,
&RegExSyntaxTypeListSize,
RegExSyntaxTypeList
);
} else if (EFI_ERROR (Status)) {
goto Done;
}
for (GuidIndex = 0; GuidIndex < RegExSyntaxTypeListSize / sizeof(EFI_GUID); GuidIndex++) {
if (CompareGuid (&RegExSyntaxTypeList[GuidIndex], SyntaxType)) {
//
// Find the match type, return the value.
//
Result->Type = EFI_IFR_TYPE_BOOLEAN;
Status = RegularExpressionProtocol->MatchString (
RegularExpressionProtocol,
String[0],
String[1],
SyntaxType,
&Result->Value.b,
NULL,
&CapturesCount
);
goto Done;
}
}
if (RegExSyntaxTypeList != NULL) {
FreePool (RegExSyntaxTypeList);
}
}
//
// Type specified by SyntaxType is not supported
// in any of the EFI_REGULAR_EXPRESSION_PROTOCOL instances.
//
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
Done:
if (String[0] != NULL) {
FreePool (String[0]);
}
if (String[1] != NULL) {
FreePool (String[1]);
}
if (RegExSyntaxTypeList != NULL) {
FreePool (RegExSyntaxTypeList);
}
if (HandleBuffer != NULL) {
FreePool (HandleBuffer);
}
return Status;
}
/**
Evaluate opcode EFI_IFR_FIND.
@param FormSet Formset which contains this opcode.
@param Format Case sensitive or insensitive.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrFind (
IN FORM_BROWSER_FORMSET *FormSet,
IN UINT8 Format,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[3];
CHAR16 *String[2];
UINTN Base;
CHAR16 *StringPtr;
UINTN Index;
ZeroMem (Value, sizeof (Value));
if (Format > EFI_IFR_FF_CASE_INSENSITIVE) {
return EFI_INVALID_PARAMETER;
}
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[2]);
if (EFI_ERROR (Status)) {
return Status;
}
if (Value[0].Type > EFI_IFR_TYPE_NUM_SIZE_64) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Base = (UINTN) Value[0].Value.u64;
//
// String[0] - sub-string
// String[1] - The string to search
//
String[0] = NULL;
String[1] = NULL;
for (Index = 0; Index < 2; Index++) {
if (Value[Index + 1].Type != EFI_IFR_TYPE_STRING) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
String[Index] = GetToken (Value[Index + 1].Value.string, FormSet->HiiHandle);
if (String[Index] == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
if (Format == EFI_IFR_FF_CASE_INSENSITIVE) {
//
// Case insensitive, convert both string to upper case
//
IfrStrToUpper (String[Index]);
}
}
Result->Type = EFI_IFR_TYPE_NUM_SIZE_64;
if (Base >= StrLen (String[1])) {
Result->Value.u64 = 0xFFFFFFFFFFFFFFFFULL;
} else {
StringPtr = StrStr (String[1] + Base, String[0]);
Result->Value.u64 = (StringPtr == NULL) ? 0xFFFFFFFFFFFFFFFFULL : (StringPtr - String[1]);
}
Done:
if (String[0] != NULL) {
FreePool (String[0]);
}
if (String[1] != NULL) {
FreePool (String[1]);
}
return Status;
}
/**
Evaluate opcode EFI_IFR_MID.
@param FormSet Formset which contains this opcode.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrMid (
IN FORM_BROWSER_FORMSET *FormSet,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[3];
CHAR16 *String;
UINTN Base;
UINTN Length;
CHAR16 *SubString;
UINT16 BufferLen;
UINT8 *Buffer;
ZeroMem (Value, sizeof (Value));
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[2]);
if (EFI_ERROR (Status)) {
return Status;
}
if (Value[0].Type > EFI_IFR_TYPE_NUM_SIZE_64) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Length = (UINTN) Value[0].Value.u64;
if (Value[1].Type > EFI_IFR_TYPE_NUM_SIZE_64) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Base = (UINTN) Value[1].Value.u64;
if (Value[2].Type != EFI_IFR_TYPE_STRING && !IsTypeInBuffer(&Value[2])) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
if (Value[2].Type == EFI_IFR_TYPE_STRING) {
String = GetToken (Value[2].Value.string, FormSet->HiiHandle);
if (String == NULL) {
return EFI_NOT_FOUND;
}
if (Length == 0 || Base >= StrLen (String)) {
SubString = gEmptyString;
} else {
SubString = String + Base;
if ((Base + Length) < StrLen (String)) {
SubString[Length] = L'\0';
}
}
Result->Type = EFI_IFR_TYPE_STRING;
Result->Value.string = NewString (SubString, FormSet->HiiHandle);
FreePool (String);
} else {
BufferLen = GetLengthForValue (&Value[2]);
Buffer = GetBufferForValue (&Value[2]);
Result->Type = EFI_IFR_TYPE_BUFFER;
if (Length == 0 || Base >= BufferLen) {
Result->BufferLen = 0;
Result->Buffer = NULL;
} else {
Result->BufferLen = (UINT16)((BufferLen - Base) < Length ? (BufferLen - Base) : Length);
Result->Buffer = AllocateZeroPool (Result->BufferLen);
ASSERT (Result->Buffer != NULL);
CopyMem (Result->Buffer, &Buffer[Base], Result->BufferLen);
}
if (Value[2].Type == EFI_IFR_TYPE_BUFFER) {
FreePool (Value[2].Buffer);
}
}
return Status;
}
/**
Evaluate opcode EFI_IFR_TOKEN.
@param FormSet Formset which contains this opcode.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrToken (
IN FORM_BROWSER_FORMSET *FormSet,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[3];
CHAR16 *String[2];
UINTN Count;
CHAR16 *Delimiter;
CHAR16 *SubString;
CHAR16 *StringPtr;
UINTN Index;
ZeroMem (Value, sizeof (Value));
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[2]);
if (EFI_ERROR (Status)) {
return Status;
}
if (Value[0].Type > EFI_IFR_TYPE_NUM_SIZE_64) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Count = (UINTN) Value[0].Value.u64;
//
// String[0] - Delimiter
// String[1] - The string to search
//
String[0] = NULL;
String[1] = NULL;
for (Index = 0; Index < 2; Index++) {
if (Value[Index + 1].Type != EFI_IFR_TYPE_STRING) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
String[Index] = GetToken (Value[Index + 1].Value.string, FormSet->HiiHandle);
if (String[Index] == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
}
Delimiter = String[0];
SubString = String[1];
while (Count > 0) {
SubString = StrStr (SubString, Delimiter);
if (SubString != NULL) {
//
// Skip over the delimiter
//
SubString = SubString + StrLen (Delimiter);
} else {
break;
}
Count--;
}
if (SubString == NULL) {
//
// nth delimited sub-string not found, push an empty string
//
SubString = gEmptyString;
} else {
//
// Put a NULL terminator for nth delimited sub-string
//
StringPtr = StrStr (SubString, Delimiter);
if (StringPtr != NULL) {
*StringPtr = L'\0';
}
}
Result->Type = EFI_IFR_TYPE_STRING;
Result->Value.string = NewString (SubString, FormSet->HiiHandle);
Done:
if (String[0] != NULL) {
FreePool (String[0]);
}
if (String[1] != NULL) {
FreePool (String[1]);
}
return Status;
}
/**
Evaluate opcode EFI_IFR_SPAN.
@param FormSet Formset which contains this opcode.
@param Flags FIRST_MATCHING or FIRST_NON_MATCHING.
@param Result Evaluation result for this opcode.
@retval EFI_SUCCESS Opcode evaluation success.
@retval Other Opcode evaluation failed.
**/
EFI_STATUS
IfrSpan (
IN FORM_BROWSER_FORMSET *FormSet,
IN UINT8 Flags,
OUT EFI_HII_VALUE *Result
)
{
EFI_STATUS Status;
EFI_HII_VALUE Value[3];
CHAR16 *String[2];
CHAR16 *Charset;
UINTN Base;
UINTN Index;
CHAR16 *StringPtr;
BOOLEAN Found;
ZeroMem (Value, sizeof (Value));
Status = PopExpression (&Value[0]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[1]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = PopExpression (&Value[2]);
if (EFI_ERROR (Status)) {
return Status;
}
if (Value[0].Type > EFI_IFR_TYPE_NUM_SIZE_64) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
return EFI_SUCCESS;
}
Base = (UINTN) Value[0].Value.u64;
//
// String[0] - Charset
// String[1] - The string to search
//
String[0] = NULL;
String[1] = NULL;
for (Index = 0; Index < 2; Index++) {
if (Value[Index + 1].Type != EFI_IFR_TYPE_STRING) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
String[Index] = GetToken (Value[Index + 1].Value.string, FormSet->HiiHandle);
if (String [Index] == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
}
if (Base >= StrLen (String[1])) {
Result->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
goto Done;
}
Found = FALSE;
StringPtr = String[1] + Base;
Charset = String[0];
while (*StringPtr != 0 && !Found) {
Index = 0;
while (Charset[Index] != 0) {
if (*StringPtr >= Charset[Index] && *StringPtr <= Charset[Index + 1]) {
if (Flags == EFI_IFR_FLAGS_FIRST_MATCHING) {
Found = TRUE;
break;
}
} else {
if (Flags == EFI_IFR_FLAGS_FIRST_NON_MATCHING) {
Found = TRUE;
break;
}
}
//
// Skip characters pair representing low-end of a range and high-end of a range
//
Index += 2;
}
if (!Found) {
StringPtr++;
}
}
Result->Type = EFI_IFR_TYPE_NUM_SIZE_64;
Result->Value.u64 = StringPtr - String[1];
Done:
if (String[0] != NULL) {
FreePool (String[0]);
}
if (String[1] != NULL) {
FreePool (String[1]);
}
return Status;
}
/**
Zero extend integer/boolean/date/time to UINT64 for comparing.
@param Value HII Value to be converted.
**/
VOID
ExtendValueToU64 (
IN EFI_HII_VALUE *Value
)
{
UINT64 Temp;
Temp = 0;
switch (Value->Type) {
case EFI_IFR_TYPE_NUM_SIZE_8:
Temp = Value->Value.u8;
break;
case EFI_IFR_TYPE_NUM_SIZE_16:
Temp = Value->Value.u16;
break;
case EFI_IFR_TYPE_NUM_SIZE_32:
Temp = Value->Value.u32;
break;
case EFI_IFR_TYPE_BOOLEAN:
Temp = Value->Value.b;
break;
case EFI_IFR_TYPE_TIME:
Temp = Value->Value.u32 & 0xffffff;
break;
case EFI_IFR_TYPE_DATE:
Temp = Value->Value.u32;
break;
default:
return;
}
Value->Value.u64 = Temp;
}
/**
Get UINT64 type value.
@param Value Input Hii value.
@retval UINT64 Return the UINT64 type value.
**/
UINT64
HiiValueToUINT64 (
IN EFI_HII_VALUE *Value
)
{
UINT64 RetVal;
RetVal = 0;
switch (Value->Type) {
case EFI_IFR_TYPE_NUM_SIZE_8:
RetVal = Value->Value.u8;
break;
case EFI_IFR_TYPE_NUM_SIZE_16:
RetVal = Value->Value.u16;
break;
case EFI_IFR_TYPE_NUM_SIZE_32:
RetVal = Value->Value.u32;
break;
case EFI_IFR_TYPE_BOOLEAN:
RetVal = Value->Value.b;
break;
case EFI_IFR_TYPE_DATE:
RetVal = *(UINT64*) &Value->Value.date;
break;
case EFI_IFR_TYPE_TIME:
RetVal = (*(UINT64*) &Value->Value.time) & 0xffffff;
break;
default:
RetVal = Value->Value.u64;
break;
}
return RetVal;
}
/**
Compare two Hii value.
@param Value1 Expression value to compare on left-hand.
@param Value2 Expression value to compare on right-hand.
@param Result Return value after compare.
retval 0 Two operators equal.
return Positive value if Value1 is greater than Value2.
retval Negative value if Value1 is less than Value2.
@param HiiHandle Only required for string compare.
@retval other Could not perform compare on two values.
@retval EFI_SUCCESS Compare the value success.
**/
EFI_STATUS
CompareHiiValue (
IN EFI_HII_VALUE *Value1,
IN EFI_HII_VALUE *Value2,
OUT INTN *Result,
IN EFI_HII_HANDLE HiiHandle OPTIONAL
)
{
INT64 Temp64;
CHAR16 *Str1;
CHAR16 *Str2;
UINTN Len;
UINT8 *Buf1;
UINT16 Buf1Len;
UINT8 *Buf2;
UINT16 Buf2Len;
if (Value1->Type == EFI_IFR_TYPE_STRING && Value2->Type == EFI_IFR_TYPE_STRING) {
if (Value1->Value.string == 0 || Value2->Value.string == 0) {
//
// StringId 0 is reserved
//
return EFI_INVALID_PARAMETER;
}
if (Value1->Value.string == Value2->Value.string) {
*Result = 0;
return EFI_SUCCESS;
}
Str1 = GetToken (Value1->Value.string, HiiHandle);
if (Str1 == NULL) {
//
// String not found
//
return EFI_NOT_FOUND;
}
Str2 = GetToken (Value2->Value.string, HiiHandle);
if (Str2 == NULL) {
FreePool (Str1);
return EFI_NOT_FOUND;
}
*Result = StrCmp (Str1, Str2);
FreePool (Str1);
FreePool (Str2);
return EFI_SUCCESS;
}
//
// Take types(date, time, ref, buffer) as buffer
//
if (IsTypeInBuffer(Value1) && IsTypeInBuffer(Value2)) {
Buf1 = GetBufferForValue(Value1);
Buf1Len = GetLengthForValue(Value1);
Buf2 = GetBufferForValue(Value2);
Buf2Len = GetLengthForValue(Value2);
Len = Buf1Len > Buf2Len ? Buf2Len : Buf1Len;
*Result = CompareMem (Buf1, Buf2, Len);
if ((*Result == 0) && (Buf1Len != Buf2Len)) {
//
// In this case, means base on samll number buffer, the data is same
// So which value has more data, which value is bigger.
//
*Result = Buf1Len > Buf2Len ? 1 : -1;
}
return EFI_SUCCESS;
}
//
// Take types(integer, boolean) as integer
//
if (IsTypeInUINT64(Value1) && IsTypeInUINT64(Value2)) {
Temp64 = HiiValueToUINT64(Value1) - HiiValueToUINT64(Value2);
if (Temp64 > 0) {
*Result = 1;
} else if (Temp64 < 0) {
*Result = -1;
} else {
*Result = 0;
}
return EFI_SUCCESS;
}
return EFI_UNSUPPORTED;
}
/**
Check if current user has the privilege specified by the permissions GUID.
@param[in] Guid A GUID specifying setup access permissions.
@retval TRUE Current user has the privilege.
@retval FALSE Current user does not have the privilege.
**/
BOOLEAN
CheckUserPrivilege (
IN EFI_GUID *Guid
)
{
EFI_STATUS Status;
EFI_USER_PROFILE_HANDLE UserProfileHandle;
EFI_USER_INFO_HANDLE UserInfoHandle;
EFI_USER_INFO *UserInfo;
EFI_GUID *UserPermissionsGuid;
UINTN UserInfoSize;
UINTN AccessControlDataSize;
EFI_USER_INFO_ACCESS_CONTROL *AccessControl;
UINTN RemainSize;
if (mUserManager == NULL) {
Status = gBS->LocateProtocol (
&gEfiUserManagerProtocolGuid,
NULL,
(VOID **) &mUserManager
);
if (EFI_ERROR (Status)) {
///
/// If the system does not support user management, then it is assumed that
/// all users have admin privilege and evaluation of each EFI_IFR_SECURITY
/// op-code is always TRUE.
///
return TRUE;
}
}
Status = mUserManager->Current (mUserManager, &UserProfileHandle);
ASSERT_EFI_ERROR (Status);
///
/// Enumerate all user information of the current user profile
/// to look for any EFI_USER_INFO_ACCESS_SETUP record.
///
for (UserInfoHandle = NULL;;) {
Status = mUserManager->GetNextInfo (mUserManager, UserProfileHandle, &UserInfoHandle);
if (EFI_ERROR (Status)) {
break;
}
UserInfoSize = 0;
Status = mUserManager->GetInfo (mUserManager, UserProfileHandle, UserInfoHandle, NULL, &UserInfoSize);
if (Status != EFI_BUFFER_TOO_SMALL) {
continue;
}
UserInfo = (EFI_USER_INFO *) AllocatePool (UserInfoSize);
if (UserInfo == NULL) {
break;
}
Status = mUserManager->GetInfo (mUserManager, UserProfileHandle, UserInfoHandle, UserInfo, &UserInfoSize);
if (EFI_ERROR (Status) ||
UserInfo->InfoType != EFI_USER_INFO_ACCESS_POLICY_RECORD ||
UserInfo->InfoSize <= sizeof (EFI_USER_INFO)) {
FreePool (UserInfo);
continue;
}
RemainSize = UserInfo->InfoSize - sizeof (EFI_USER_INFO);
AccessControl = (EFI_USER_INFO_ACCESS_CONTROL *)(UserInfo + 1);
while (RemainSize >= sizeof (EFI_USER_INFO_ACCESS_CONTROL)) {
if (RemainSize < AccessControl->Size || AccessControl->Size < sizeof (EFI_USER_INFO_ACCESS_CONTROL)) {
break;
}
if (AccessControl->Type == EFI_USER_INFO_ACCESS_SETUP) {
///
/// Check if current user has the privilege specified by the permissions GUID.
///
UserPermissionsGuid = (EFI_GUID *)(AccessControl + 1);
AccessControlDataSize = AccessControl->Size - sizeof (EFI_USER_INFO_ACCESS_CONTROL);
while (AccessControlDataSize >= sizeof (EFI_GUID)) {
if (CompareGuid (Guid, UserPermissionsGuid)) {
FreePool (UserInfo);
return TRUE;
}
UserPermissionsGuid++;
AccessControlDataSize -= sizeof (EFI_GUID);
}
}
RemainSize -= AccessControl->Size;
AccessControl = (EFI_USER_INFO_ACCESS_CONTROL *)((UINT8 *)AccessControl + AccessControl->Size);
}
FreePool (UserInfo);
}
return FALSE;
}
/**
Get question value from the predefined formset.
@param DevicePath The driver's device path which produece the formset data.
@param InputHiiHandle The hii handle associate with the formset data.
@param FormSetGuid The formset guid which include the question.
@param QuestionId The question id which need to get value from.
@param Value The return data about question's value.
@retval TRUE Get the question value success.
@retval FALSE Get the question value failed.
**/
BOOLEAN
GetQuestionValueFromForm (
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN EFI_HII_HANDLE InputHiiHandle,
IN EFI_GUID *FormSetGuid,
IN EFI_QUESTION_ID QuestionId,
OUT EFI_HII_VALUE *Value
)
{
EFI_STATUS Status;
EFI_HII_HANDLE HiiHandle;
FORM_BROWSER_STATEMENT *Question;
FORM_BROWSER_FORMSET *FormSet;
FORM_BROWSER_FORM *Form;
BOOLEAN GetTheVal;
LIST_ENTRY *Link;
//
// The input parameter DevicePath or InputHiiHandle must have one valid input.
//
ASSERT ((DevicePath != NULL && InputHiiHandle == NULL) ||
(DevicePath == NULL && InputHiiHandle != NULL) );
GetTheVal = TRUE;
HiiHandle = NULL;
Question = NULL;
Form = NULL;
//
// Get HiiHandle.
//
if (DevicePath != NULL) {
HiiHandle = DevicePathToHiiHandle (DevicePath, FormSetGuid);
if (HiiHandle == NULL) {
return FALSE;
}
} else {
HiiHandle = InputHiiHandle;
}
ASSERT (HiiHandle != NULL);
//
// Get the formset data include this question.
//
FormSet = AllocateZeroPool (sizeof (FORM_BROWSER_FORMSET));
ASSERT (FormSet != NULL);
Status = InitializeFormSet(HiiHandle, FormSetGuid, FormSet);
if (EFI_ERROR (Status)) {
GetTheVal = FALSE;
goto Done;
}
//
// Base on the Question Id to get the question info.
//
Question = IdToQuestion(FormSet, NULL, QuestionId);
if (Question == NULL) {
GetTheVal = FALSE;
goto Done;
}
//
// Search form in the formset scope
//
Link = GetFirstNode (&FormSet->FormListHead);
while (!IsNull (&FormSet->FormListHead, Link)) {
Form = FORM_BROWSER_FORM_FROM_LINK (Link);
Question = IdToQuestion2 (Form, QuestionId);
if (Question != NULL) {
break;
}
Link = GetNextNode (&FormSet->FormListHead, Link);
Form = NULL;
}
ASSERT (Form != NULL);
//
// Get the question value.
//
Status = GetQuestionValue(FormSet, Form, Question, GetSetValueWithEditBuffer);
if (EFI_ERROR (Status)) {
GetTheVal = FALSE;
goto Done;
}
CopyMem (Value, &Question->HiiValue, sizeof (EFI_HII_VALUE));
Done:
//
// Clean the formset structure and restore the global parameter.
//
if (FormSet != NULL) {
DestroyFormSet (FormSet);
}
return GetTheVal;
}
/**
Evaluate the result of a HII expression.
If Expression is NULL, then ASSERT.
@param FormSet FormSet associated with this expression.
@param Form Form associated with this expression.
@param Expression Expression to be evaluated.
@retval EFI_SUCCESS The expression evaluated successfuly
@retval EFI_NOT_FOUND The Question which referenced by a QuestionId
could not be found.
@retval EFI_OUT_OF_RESOURCES There is not enough system memory to grow the
stack.
@retval EFI_ACCESS_DENIED The pop operation underflowed the stack
@retval EFI_INVALID_PARAMETER Syntax error with the Expression
**/
EFI_STATUS
EvaluateExpression (
IN FORM_BROWSER_FORMSET *FormSet,
IN FORM_BROWSER_FORM *Form,
IN OUT FORM_EXPRESSION *Expression
)
{
EFI_STATUS Status;
LIST_ENTRY *Link;
EXPRESSION_OPCODE *OpCode;
FORM_BROWSER_STATEMENT *Question;
FORM_BROWSER_STATEMENT *Question2;
UINT16 Index;
EFI_HII_VALUE Data1;
EFI_HII_VALUE Data2;
EFI_HII_VALUE Data3;
FORM_EXPRESSION *RuleExpression;
EFI_HII_VALUE *Value;
INTN Result;
CHAR16 *StrPtr;
CHAR16 *NameValue;
UINT32 TempValue;
LIST_ENTRY *SubExpressionLink;
FORM_EXPRESSION *SubExpression;
UINTN StackOffset;
UINTN TempLength;
CHAR16 TempStr[5];
UINT8 DigitUint8;
UINT8 *TempBuffer;
EFI_TIME EfiTime;
EFI_HII_VALUE QuestionVal;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
StrPtr = NULL;
//
// Save current stack offset.
//
StackOffset = SaveExpressionEvaluationStackOffset ();
ASSERT (Expression != NULL);
Expression->Result.Type = EFI_IFR_TYPE_OTHER;
Link = GetFirstNode (&Expression->OpCodeListHead);
while (!IsNull (&Expression->OpCodeListHead, Link)) {
OpCode = EXPRESSION_OPCODE_FROM_LINK (Link);
Link = GetNextNode (&Expression->OpCodeListHead, Link);
ZeroMem (&Data1, sizeof (EFI_HII_VALUE));
ZeroMem (&Data2, sizeof (EFI_HII_VALUE));
ZeroMem (&Data3, sizeof (EFI_HII_VALUE));
Value = &Data3;
Value->Type = EFI_IFR_TYPE_BOOLEAN;
Status = EFI_SUCCESS;
switch (OpCode->Operand) {
//
// Built-in functions
//
case EFI_IFR_EQ_ID_VAL_OP:
Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
if (Question == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Status = CompareHiiValue (&Question->HiiValue, &OpCode->Value, &Result, NULL);
if (Status == EFI_UNSUPPORTED) {
Status = EFI_SUCCESS;
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (EFI_ERROR (Status)) {
goto Done;
}
Value->Value.b = (BOOLEAN) ((Result == 0) ? TRUE : FALSE);
break;
case EFI_IFR_EQ_ID_ID_OP:
Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
if (Question == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Question2 = IdToQuestion (FormSet, Form, OpCode->QuestionId2);
if (Question2 == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Status = CompareHiiValue (&Question->HiiValue, &Question2->HiiValue, &Result, FormSet->HiiHandle);
if (Status == EFI_UNSUPPORTED) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
break;
}
if (EFI_ERROR (Status)) {
goto Done;
}
Value->Value.b = (BOOLEAN) ((Result == 0) ? TRUE : FALSE);
break;
case EFI_IFR_EQ_ID_VAL_LIST_OP:
Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
if (Question == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value->Value.b = FALSE;
for (Index =0; Index < OpCode->ListLength; Index++) {
if (Question->HiiValue.Value.u16 == OpCode->ValueList[Index]) {
Value->Value.b = TRUE;
break;
}
}
break;
case EFI_IFR_DUP_OP:
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
Status = PushExpression (Value);
break;
case EFI_IFR_QUESTION_REF1_OP:
case EFI_IFR_THIS_OP:
Question = IdToQuestion (FormSet, Form, OpCode->QuestionId);
if (Question == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
Value = &Question->HiiValue;
break;
case EFI_IFR_SECURITY_OP:
Value->Value.b = CheckUserPrivilege (&OpCode->Guid);
break;
case EFI_IFR_GET_OP:
//
// Get Value from VarStore buffer, EFI VarStore, Name/Value VarStore.
//
Value->Type = EFI_IFR_TYPE_UNDEFINED;
Value->Value.u8 = 0;
if (OpCode->VarStorage != NULL) {
switch (OpCode->VarStorage->Type) {
case EFI_HII_VARSTORE_BUFFER:
case EFI_HII_VARSTORE_EFI_VARIABLE_BUFFER:
//
// Get value from Edit Buffer
//
Value->Type = OpCode->ValueType;
CopyMem (&Value->Value, OpCode->VarStorage->EditBuffer + OpCode->VarStoreInfo.VarOffset, OpCode->ValueWidth);
break;
case EFI_HII_VARSTORE_NAME_VALUE:
if (OpCode->ValueType != EFI_IFR_TYPE_STRING) {
//
// Get value from string except for STRING value.
//
Status = GetValueByName (OpCode->VarStorage, OpCode->ValueName, &StrPtr, GetSetValueWithEditBuffer);
if (!EFI_ERROR (Status)) {
ASSERT (StrPtr != NULL);
TempLength = StrLen (StrPtr);
if (OpCode->ValueWidth >= ((TempLength + 1) / 2)) {
Value->Type = OpCode->ValueType;
TempBuffer = (UINT8 *) &Value->Value;
ZeroMem (TempStr, sizeof (TempStr));
for (Index = 0; Index < TempLength; Index ++) {
TempStr[0] = StrPtr[TempLength - Index - 1];
DigitUint8 = (UINT8) StrHexToUint64 (TempStr);
if ((Index & 1) == 0) {
TempBuffer [Index/2] = DigitUint8;
} else {
TempBuffer [Index/2] = (UINT8) ((DigitUint8 << 4) + TempBuffer [Index/2]);
}
}
}
}
}
break;
case EFI_HII_VARSTORE_EFI_VARIABLE:
//
// Get value from variable.
//
TempLength = OpCode->ValueWidth;
Value->Type = OpCode->ValueType;
Status = gRT->GetVariable (
OpCode->ValueName,
&OpCode->VarStorage->Guid,
NULL,
&TempLength,
&Value->Value
);
if (EFI_ERROR (Status)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
Value->Value.u8 = 0;
}
break;
default:
//
// Not recognize storage.
//
Status = EFI_UNSUPPORTED;
goto Done;
}
} else {
//
// For Time/Date Data
//
if (OpCode->ValueType != EFI_IFR_TYPE_DATE && OpCode->ValueType != EFI_IFR_TYPE_TIME) {
//
// Only support Data/Time data when storage doesn't exist.
//
Status = EFI_UNSUPPORTED;
goto Done;
}
Status = gRT->GetTime (&EfiTime, NULL);
if (!EFI_ERROR (Status)) {
if (OpCode->ValueType == EFI_IFR_TYPE_DATE) {
switch (OpCode->VarStoreInfo.VarOffset) {
case 0x00:
Value->Type = EFI_IFR_TYPE_NUM_SIZE_16;
Value->Value.u16 = EfiTime.Year;
break;
case 0x02:
Value->Type = EFI_IFR_TYPE_NUM_SIZE_8;
Value->Value.u8 = EfiTime.Month;
break;
case 0x03:
Value->Type = EFI_IFR_TYPE_NUM_SIZE_8;
Value->Value.u8 = EfiTime.Day;
break;
default:
//
// Invalid Date field.
//
Status = EFI_INVALID_PARAMETER;
goto Done;
}
} else {
switch (OpCode->VarStoreInfo.VarOffset) {
case 0x00:
Value->Type = EFI_IFR_TYPE_NUM_SIZE_8;
Value->Value.u8 = EfiTime.Hour;
break;
case 0x01:
Value->Type = EFI_IFR_TYPE_NUM_SIZE_8;
Value->Value.u8 = EfiTime.Minute;
break;
case 0x02:
Value->Type = EFI_IFR_TYPE_NUM_SIZE_8;
Value->Value.u8 = EfiTime.Second;
break;
default:
//
// Invalid Time field.
//
Status = EFI_INVALID_PARAMETER;
goto Done;
}
}
}
}
break;
case EFI_IFR_QUESTION_REF3_OP:
//
// EFI_IFR_QUESTION_REF3
// Pop an expression from the expression stack
//
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Validate the expression value
//
if ((Value->Type > EFI_IFR_TYPE_NUM_SIZE_64) || (Value->Value.u64 > 0xffff)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (OpCode->DevicePath != 0) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
StrPtr = GetToken (OpCode->DevicePath, FormSet->HiiHandle);
if (StrPtr != NULL && mPathFromText != NULL) {
DevicePath = mPathFromText->ConvertTextToDevicePath(StrPtr);
if (DevicePath != NULL && GetQuestionValueFromForm(DevicePath, NULL, &OpCode->Guid, Value->Value.u16, &QuestionVal)) {
Value = &QuestionVal;
}
if (DevicePath != NULL) {
FreePool (DevicePath);
}
}
if (StrPtr != NULL) {
FreePool (StrPtr);
}
} else if (IsZeroGuid (&OpCode->Guid)) {
if (!GetQuestionValueFromForm(NULL, FormSet->HiiHandle, &OpCode->Guid, Value->Value.u16, &QuestionVal)){
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value = &QuestionVal;
} else {
Question = IdToQuestion (FormSet, Form, Value->Value.u16);
if (Question == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
//
// push the questions' value on to the expression stack
//
Value = &Question->HiiValue;
}
break;
case EFI_IFR_RULE_REF_OP:
//
// Find expression for this rule
//
RuleExpression = RuleIdToExpression (Form, OpCode->RuleId);
if (RuleExpression == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
//
// Evaluate this rule expression
//
Status = EvaluateExpression (FormSet, Form, RuleExpression);
if (EFI_ERROR (Status) || RuleExpression->Result.Type == EFI_IFR_TYPE_UNDEFINED) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value = &RuleExpression->Result;
break;
case EFI_IFR_STRING_REF1_OP:
Value->Type = EFI_IFR_TYPE_STRING;
Value->Value.string = OpCode->Value.Value.string;
break;
//
// Constant
//
case EFI_IFR_TRUE_OP:
case EFI_IFR_FALSE_OP:
case EFI_IFR_ONE_OP:
case EFI_IFR_ONES_OP:
case EFI_IFR_UINT8_OP:
case EFI_IFR_UINT16_OP:
case EFI_IFR_UINT32_OP:
case EFI_IFR_UINT64_OP:
case EFI_IFR_UNDEFINED_OP:
case EFI_IFR_VERSION_OP:
case EFI_IFR_ZERO_OP:
Value = &OpCode->Value;
break;
//
// unary-op
//
case EFI_IFR_LENGTH_OP:
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Value->Type != EFI_IFR_TYPE_STRING && !IsTypeInBuffer (Value)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (Value->Type == EFI_IFR_TYPE_STRING) {
StrPtr = GetToken (Value->Value.string, FormSet->HiiHandle);
if (StrPtr == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
Value->Type = EFI_IFR_TYPE_NUM_SIZE_64;
Value->Value.u64 = StrLen (StrPtr);
FreePool (StrPtr);
} else {
Value->Type = EFI_IFR_TYPE_NUM_SIZE_64;
Value->Value.u64 = GetLengthForValue(Value);
FreePool (Value->Buffer);
}
break;
case EFI_IFR_NOT_OP:
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Value->Type != EFI_IFR_TYPE_BOOLEAN) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value->Value.b = (BOOLEAN) (!Value->Value.b);
break;
case EFI_IFR_QUESTION_REF2_OP:
//
// Pop an expression from the expression stack
//
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Validate the expression value
//
if ((Value->Type > EFI_IFR_TYPE_NUM_SIZE_64) || (Value->Value.u64 > 0xffff)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Question = IdToQuestion (FormSet, Form, Value->Value.u16);
if (Question == NULL) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value = &Question->HiiValue;
break;
case EFI_IFR_STRING_REF2_OP:
//
// Pop an expression from the expression stack
//
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Validate the expression value
//
if ((Value->Type > EFI_IFR_TYPE_NUM_SIZE_64) || (Value->Value.u64 > 0xffff)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value->Type = EFI_IFR_TYPE_STRING;
StrPtr = GetToken (Value->Value.u16, FormSet->HiiHandle);
if (StrPtr == NULL) {
//
// If String not exit, push an empty string
//
Value->Value.string = NewString (gEmptyString, FormSet->HiiHandle);
} else {
Index = (UINT16) Value->Value.u64;
Value->Value.string = Index;
FreePool (StrPtr);
}
break;
case EFI_IFR_TO_BOOLEAN_OP:
//
// Pop an expression from the expression stack
//
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Convert an expression to a Boolean
//
if (Value->Type <= EFI_IFR_TYPE_DATE) {
//
// When converting from an unsigned integer, zero will be converted to
// FALSE and any other value will be converted to TRUE.
//
Value->Value.b = (BOOLEAN) (HiiValueToUINT64(Value) != 0);
Value->Type = EFI_IFR_TYPE_BOOLEAN;
} else if (Value->Type == EFI_IFR_TYPE_STRING) {
//
// When converting from a string, if case-insensitive compare
// with "true" is True, then push True. If a case-insensitive compare
// with "false" is True, then push False. Otherwise, push Undefined.
//
StrPtr = GetToken (Value->Value.string, FormSet->HiiHandle);
if (StrPtr == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
IfrStrToUpper (StrPtr);
if (StrCmp (StrPtr, L"TRUE") == 0){
Value->Value.b = TRUE;
Value->Type = EFI_IFR_TYPE_BOOLEAN;
} else if (StrCmp (StrPtr, L"FALSE") == 0) {
Value->Value.b = FALSE;
Value->Type = EFI_IFR_TYPE_BOOLEAN;
} else {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
}
FreePool (StrPtr);
} else if (Value->Type == EFI_IFR_TYPE_BUFFER) {
//
// When converting from a buffer, if the buffer is all zeroes,
// then push False. Otherwise push True.
//
for (Index =0; Index < Value->BufferLen; Index ++) {
if (Value->Buffer[Index] != 0) {
break;
}
}
if (Index >= Value->BufferLen) {
Value->Value.b = FALSE;
} else {
Value->Value.b = TRUE;
}
Value->Type = EFI_IFR_TYPE_BOOLEAN;
FreePool (Value->Buffer);
}
break;
case EFI_IFR_TO_STRING_OP:
Status = IfrToString (FormSet, OpCode->Format, Value);
break;
case EFI_IFR_TO_UINT_OP:
Status = IfrToUint (FormSet, Value);
break;
case EFI_IFR_TO_LOWER_OP:
case EFI_IFR_TO_UPPER_OP:
Status = InitializeUnicodeCollationProtocol ();
if (EFI_ERROR (Status)) {
goto Done;
}
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Value->Type != EFI_IFR_TYPE_STRING) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
StrPtr = GetToken (Value->Value.string, FormSet->HiiHandle);
if (StrPtr == NULL) {
Status = EFI_NOT_FOUND;
goto Done;
}
if (OpCode->Operand == EFI_IFR_TO_LOWER_OP) {
mUnicodeCollation->StrLwr (mUnicodeCollation, StrPtr);
} else {
mUnicodeCollation->StrUpr (mUnicodeCollation, StrPtr);
}
Value->Value.string = NewString (StrPtr, FormSet->HiiHandle);
FreePool (StrPtr);
break;
case EFI_IFR_BITWISE_NOT_OP:
//
// Pop an expression from the expression stack
//
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Value->Type > EFI_IFR_TYPE_DATE) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value->Type = EFI_IFR_TYPE_NUM_SIZE_64;
Value->Value.u64 = ~ HiiValueToUINT64(Value);
break;
case EFI_IFR_SET_OP:
//
// Pop an expression from the expression stack
//
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
Data1.Type = EFI_IFR_TYPE_BOOLEAN;
Data1.Value.b = FALSE;
//
// Set value to var storage buffer
//
if (OpCode->VarStorage != NULL) {
switch (OpCode->VarStorage->Type) {
case EFI_HII_VARSTORE_BUFFER:
case EFI_HII_VARSTORE_EFI_VARIABLE_BUFFER:
CopyMem (OpCode->VarStorage->EditBuffer + OpCode->VarStoreInfo.VarOffset, &Value->Value, OpCode->ValueWidth);
Data1.Value.b = TRUE;
break;
case EFI_HII_VARSTORE_NAME_VALUE:
if (OpCode->ValueType != EFI_IFR_TYPE_STRING) {
NameValue = AllocateZeroPool ((OpCode->ValueWidth * 2 + 1) * sizeof (CHAR16));
ASSERT (NameValue != NULL);
//
// Convert Buffer to Hex String
//
TempBuffer = (UINT8 *) &Value->Value + OpCode->ValueWidth - 1;
StrPtr = NameValue;
for (Index = 0; Index < OpCode->ValueWidth; Index ++, TempBuffer --) {
UnicodeValueToStringS (
StrPtr,
(OpCode->ValueWidth * 2 + 1) * sizeof (CHAR16) - ((UINTN)StrPtr - (UINTN)NameValue),
PREFIX_ZERO | RADIX_HEX,
*TempBuffer,
2
);
StrPtr += StrnLenS (StrPtr, OpCode->ValueWidth * 2 + 1 - ((UINTN)StrPtr - (UINTN)NameValue) / sizeof (CHAR16));
}
Status = SetValueByName (OpCode->VarStorage, OpCode->ValueName, NameValue, GetSetValueWithEditBuffer, NULL);
FreePool (NameValue);
if (!EFI_ERROR (Status)) {
Data1.Value.b = TRUE;
}
}
break;
case EFI_HII_VARSTORE_EFI_VARIABLE:
Status = gRT->SetVariable (
OpCode->ValueName,
&OpCode->VarStorage->Guid,
OpCode->VarStorage->Attributes,
OpCode->ValueWidth,
&Value->Value
);
if (!EFI_ERROR (Status)) {
Data1.Value.b = TRUE;
}
break;
default:
//
// Not recognize storage.
//
Status = EFI_UNSUPPORTED;
goto Done;
}
} else {
//
// For Time/Date Data
//
if (OpCode->ValueType != EFI_IFR_TYPE_DATE && OpCode->ValueType != EFI_IFR_TYPE_TIME) {
//
// Only support Data/Time data when storage doesn't exist.
//
Status = EFI_UNSUPPORTED;
goto Done;
}
Status = gRT->GetTime (&EfiTime, NULL);
if (!EFI_ERROR (Status)) {
if (OpCode->ValueType == EFI_IFR_TYPE_DATE) {
switch (OpCode->VarStoreInfo.VarOffset) {
case 0x00:
EfiTime.Year = Value->Value.u16;
break;
case 0x02:
EfiTime.Month = Value->Value.u8;
break;
case 0x03:
EfiTime.Day = Value->Value.u8;
break;
default:
//
// Invalid Date field.
//
Status = EFI_INVALID_PARAMETER;
goto Done;
}
} else {
switch (OpCode->VarStoreInfo.VarOffset) {
case 0x00:
EfiTime.Hour = Value->Value.u8;
break;
case 0x01:
EfiTime.Minute = Value->Value.u8;
break;
case 0x02:
EfiTime.Second = Value->Value.u8;
break;
default:
//
// Invalid Time field.
//
Status = EFI_INVALID_PARAMETER;
goto Done;
}
}
Status = gRT->SetTime (&EfiTime);
if (!EFI_ERROR (Status)) {
Data1.Value.b = TRUE;
}
}
}
Value = &Data1;
break;
//
// binary-op
//
case EFI_IFR_ADD_OP:
case EFI_IFR_SUBTRACT_OP:
case EFI_IFR_MULTIPLY_OP:
case EFI_IFR_DIVIDE_OP:
case EFI_IFR_MODULO_OP:
case EFI_IFR_BITWISE_AND_OP:
case EFI_IFR_BITWISE_OR_OP:
case EFI_IFR_SHIFT_LEFT_OP:
case EFI_IFR_SHIFT_RIGHT_OP:
//
// Pop an expression from the expression stack
//
Status = PopExpression (&Data2);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Pop another expression from the expression stack
//
Status = PopExpression (&Data1);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Data2.Type > EFI_IFR_TYPE_DATE) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (Data1.Type > EFI_IFR_TYPE_DATE) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Value->Type = EFI_IFR_TYPE_NUM_SIZE_64;
switch (OpCode->Operand) {
case EFI_IFR_ADD_OP:
Value->Value.u64 = HiiValueToUINT64(&Data1) + HiiValueToUINT64(&Data2);
break;
case EFI_IFR_SUBTRACT_OP:
Value->Value.u64 = HiiValueToUINT64(&Data1) - HiiValueToUINT64(&Data2);
break;
case EFI_IFR_MULTIPLY_OP:
Value->Value.u64 = MultU64x32 (HiiValueToUINT64(&Data1), (UINT32) HiiValueToUINT64(&Data2));
break;
case EFI_IFR_DIVIDE_OP:
Value->Value.u64 = DivU64x32 (HiiValueToUINT64(&Data1), (UINT32) HiiValueToUINT64(&Data2));
break;
case EFI_IFR_MODULO_OP:
DivU64x32Remainder (HiiValueToUINT64(&Data1), (UINT32) HiiValueToUINT64(&Data2), &TempValue);
Value->Value.u64 = TempValue;
break;
case EFI_IFR_BITWISE_AND_OP:
Value->Value.u64 = HiiValueToUINT64(&Data1) & HiiValueToUINT64(&Data2);
break;
case EFI_IFR_BITWISE_OR_OP:
Value->Value.u64 = HiiValueToUINT64(&Data1) | HiiValueToUINT64(&Data2);
break;
case EFI_IFR_SHIFT_LEFT_OP:
Value->Value.u64 = LShiftU64 (HiiValueToUINT64(&Data1), (UINTN) HiiValueToUINT64(&Data2));
break;
case EFI_IFR_SHIFT_RIGHT_OP:
Value->Value.u64 = RShiftU64 (HiiValueToUINT64(&Data1), (UINTN) HiiValueToUINT64(&Data2));
break;
default:
break;
}
break;
case EFI_IFR_AND_OP:
case EFI_IFR_OR_OP:
//
// Two Boolean operator
//
Status = PopExpression (&Data2);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Pop another expression from the expression stack
//
Status = PopExpression (&Data1);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Data2.Type != EFI_IFR_TYPE_BOOLEAN) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (Data1.Type != EFI_IFR_TYPE_BOOLEAN) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (OpCode->Operand == EFI_IFR_AND_OP) {
Value->Value.b = (BOOLEAN) (Data1.Value.b && Data2.Value.b);
} else {
Value->Value.b = (BOOLEAN) (Data1.Value.b || Data2.Value.b);
}
break;
case EFI_IFR_EQUAL_OP:
case EFI_IFR_NOT_EQUAL_OP:
case EFI_IFR_GREATER_EQUAL_OP:
case EFI_IFR_GREATER_THAN_OP:
case EFI_IFR_LESS_EQUAL_OP:
case EFI_IFR_LESS_THAN_OP:
//
// Compare two integer, string, boolean or date/time
//
Status = PopExpression (&Data2);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Pop another expression from the expression stack
//
Status = PopExpression (&Data1);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Data2.Type > EFI_IFR_TYPE_BOOLEAN &&
Data2.Type != EFI_IFR_TYPE_STRING &&
!IsTypeInBuffer(&Data2)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (Data1.Type > EFI_IFR_TYPE_BOOLEAN &&
Data1.Type != EFI_IFR_TYPE_STRING &&
!IsTypeInBuffer(&Data1)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
Status = CompareHiiValue (&Data1, &Data2, &Result, FormSet->HiiHandle);
if (Data1.Type == EFI_IFR_TYPE_BUFFER) {
FreePool (Data1.Buffer);
}
if (Data2.Type == EFI_IFR_TYPE_BUFFER) {
FreePool (Data2.Buffer);
}
if (Status == EFI_UNSUPPORTED) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
Status = EFI_SUCCESS;
break;
}
if (EFI_ERROR (Status)) {
goto Done;
}
switch (OpCode->Operand) {
case EFI_IFR_EQUAL_OP:
Value->Value.b = (BOOLEAN) ((Result == 0) ? TRUE : FALSE);
break;
case EFI_IFR_NOT_EQUAL_OP:
Value->Value.b = (BOOLEAN) ((Result != 0) ? TRUE : FALSE);
break;
case EFI_IFR_GREATER_EQUAL_OP:
Value->Value.b = (BOOLEAN) ((Result >= 0) ? TRUE : FALSE);
break;
case EFI_IFR_GREATER_THAN_OP:
Value->Value.b = (BOOLEAN) ((Result > 0) ? TRUE : FALSE);
break;
case EFI_IFR_LESS_EQUAL_OP:
Value->Value.b = (BOOLEAN) ((Result <= 0) ? TRUE : FALSE);
break;
case EFI_IFR_LESS_THAN_OP:
Value->Value.b = (BOOLEAN) ((Result < 0) ? TRUE : FALSE);
break;
default:
break;
}
break;
case EFI_IFR_MATCH_OP:
Status = InitializeUnicodeCollationProtocol ();
if (EFI_ERROR (Status)) {
goto Done;
}
Status = IfrMatch (FormSet, Value);
break;
case EFI_IFR_MATCH2_OP:
Status = IfrMatch2 (FormSet, &OpCode->Guid, Value);
break;
case EFI_IFR_CATENATE_OP:
Status = IfrCatenate (FormSet, Value);
break;
//
// ternary-op
//
case EFI_IFR_CONDITIONAL_OP:
//
// Pop third expression from the expression stack
//
Status = PopExpression (&Data3);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Pop second expression from the expression stack
//
Status = PopExpression (&Data2);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Pop first expression from the expression stack
//
Status = PopExpression (&Data1);
if (EFI_ERROR (Status)) {
goto Done;
}
if (Data1.Type != EFI_IFR_TYPE_BOOLEAN) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
break;
}
if (Data1.Value.b) {
Value = &Data3;
} else {
Value = &Data2;
}
break;
case EFI_IFR_FIND_OP:
Status = IfrFind (FormSet, OpCode->Format, Value);
break;
case EFI_IFR_MID_OP:
Status = IfrMid (FormSet, Value);
break;
case EFI_IFR_TOKEN_OP:
Status = IfrToken (FormSet, Value);
break;
case EFI_IFR_SPAN_OP:
Status = IfrSpan (FormSet, OpCode->Flags, Value);
break;
case EFI_IFR_MAP_OP:
//
// Pop the check value
//
Status = PopExpression (&Data1);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Check MapExpression list is valid.
//
if (OpCode->MapExpressionList.ForwardLink == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Go through map expression list.
//
SubExpressionLink = GetFirstNode(&OpCode->MapExpressionList);
while (!IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
SubExpression = FORM_EXPRESSION_FROM_LINK (SubExpressionLink);
//
// Evaluate the first expression in this pair.
//
Status = EvaluateExpression (FormSet, Form, SubExpression);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Compare the expression value with current value
//
if ((CompareHiiValue (&Data1, &SubExpression->Result, &Result, NULL) == EFI_SUCCESS) && (Result == 0)) {
//
// Try get the map value.
//
SubExpressionLink = GetNextNode (&OpCode->MapExpressionList, SubExpressionLink);
if (IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
SubExpression = FORM_EXPRESSION_FROM_LINK (SubExpressionLink);
Status = EvaluateExpression (FormSet, Form, SubExpression);
if (EFI_ERROR (Status)) {
goto Done;
}
Value = &SubExpression->Result;
break;
}
//
// Skip the second expression on this pair.
//
SubExpressionLink = GetNextNode (&OpCode->MapExpressionList, SubExpressionLink);
if (IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Goto the first expression on next pair.
//
SubExpressionLink = GetNextNode (&OpCode->MapExpressionList, SubExpressionLink);
}
//
// No map value is found.
//
if (IsNull (&OpCode->MapExpressionList, SubExpressionLink)) {
Value->Type = EFI_IFR_TYPE_UNDEFINED;
Value->Value.u8 = 0;
}
break;
default:
break;
}
if (EFI_ERROR (Status) || Value->Type == EFI_IFR_TYPE_UNDEFINED) {
goto Done;
}
Status = PushExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
}
//
// Pop the final result from expression stack
//
Value = &Data1;
Status = PopExpression (Value);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// After evaluating an expression, there should be only one value left on the expression stack
//
if (PopExpression (Value) != EFI_ACCESS_DENIED) {
Status = EFI_INVALID_PARAMETER;
}
Done:
RestoreExpressionEvaluationStackOffset (StackOffset);
if (!EFI_ERROR (Status)) {
CopyMem (&Expression->Result, Value, sizeof (EFI_HII_VALUE));
}
return Status;
}
/**
Check whether the result is TRUE or FALSE.
For the EFI_HII_VALUE value type is numeric, return TRUE if the
value is not 0.
@param Result Input the result data.
@retval TRUE The result is TRUE.
@retval FALSE The result is FALSE.
**/
BOOLEAN
IsTrue (
IN EFI_HII_VALUE *Result
)
{
switch (Result->Type) {
case EFI_IFR_TYPE_BOOLEAN:
return Result->Value.b;
case EFI_IFR_TYPE_NUM_SIZE_8:
return (BOOLEAN)(Result->Value.u8 != 0);
case EFI_IFR_TYPE_NUM_SIZE_16:
return (BOOLEAN)(Result->Value.u16 != 0);
case EFI_IFR_TYPE_NUM_SIZE_32:
return (BOOLEAN)(Result->Value.u32 != 0);
case EFI_IFR_TYPE_NUM_SIZE_64:
return (BOOLEAN)(Result->Value.u64 != 0);
default:
return FALSE;
}
}
/**
Return the result of the expression list. Check the expression list and
return the highest priority express result.
Priority: DisableIf > SuppressIf > GrayOutIf > FALSE
@param ExpList The input expression list.
@param Evaluate Whether need to evaluate the expression first.
@param FormSet FormSet associated with this expression.
@param Form Form associated with this expression.
@retval EXPRESS_RESULT Return the higher priority express result.
DisableIf > SuppressIf > GrayOutIf > FALSE
**/
EXPRESS_RESULT
EvaluateExpressionList (
IN FORM_EXPRESSION_LIST *ExpList,
IN BOOLEAN Evaluate,
IN FORM_BROWSER_FORMSET *FormSet, OPTIONAL
IN FORM_BROWSER_FORM *Form OPTIONAL
)
{
UINTN Index;
EXPRESS_RESULT ReturnVal;
EXPRESS_RESULT CompareOne;
EFI_STATUS Status;
if (ExpList == NULL) {
return ExpressFalse;
}
ASSERT(ExpList->Signature == FORM_EXPRESSION_LIST_SIGNATURE);
Index = 0;
//
// Check whether need to evaluate the expression first.
//
if (Evaluate) {
while (ExpList->Count > Index) {
Status = EvaluateExpression (FormSet, Form, ExpList->Expression[Index++]);
if (EFI_ERROR (Status)) {
return ExpressFalse;
}
}
}
//
// Run the list of expressions.
//
ReturnVal = ExpressFalse;
for (Index = 0; Index < ExpList->Count; Index++) {
if (IsTrue (&ExpList->Expression[Index]->Result)) {
switch (ExpList->Expression[Index]->Type) {
case EFI_HII_EXPRESSION_SUPPRESS_IF:
CompareOne = ExpressSuppress;
break;
case EFI_HII_EXPRESSION_GRAY_OUT_IF:
CompareOne = ExpressGrayOut;
break;
case EFI_HII_EXPRESSION_DISABLE_IF:
CompareOne = ExpressDisable;
break;
default:
return ExpressFalse;
}
ReturnVal = ReturnVal < CompareOne ? CompareOne : ReturnVal;
}
}
return ReturnVal;
}
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