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audk/MdeModulePkg/Universal/SetupBrowserDxe/Expression.c

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/** @file
Utility functions for expression evaluation.
Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#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 (
)
{
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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