1 files changed, 191 insertions, 0 deletions
diff --git a/RedfishPkg/Library/HiiUtilityLib/HiiExpression.h b/RedfishPkg/Library/HiiUtilityLib/HiiExpression.h
new file mode 100644
index 0000000000..dda96ada60
--- /dev/null
+++ b/RedfishPkg/Library/HiiUtilityLib/HiiExpression.h
@@ -0,0 +1,191 @@
+/** @file
+  Definitions of Hii Expression.
+
+  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+  (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
+  Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef HII_EXPRESSION_H_
+#define HII_EXPRESSION_H_
+
+#include <Library/HiiUtilityLib.h>
+
+/**
+  Get the expression list count.
+
+  @param[in]  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
+  );
+
+/**
+  Get the expression Buffer pointer.
+
+  @param[in]  Level              Which type this expression belong to. Form,
+                                 statement or option?
+
+  @retval  The start pointer of the expression buffer or NULL.
+
+**/
+HII_EXPRESSION **
+GetConditionalExpressionList (
+  IN EXPRESS_LEVEL  Level
+  );
+
+/**
+  Push the expression options onto the Stack.
+
+  @param[in]  Pointer            Pointer to the current expression.
+  @param[in]  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 HII_EXPRESSION  *Pointer,
+  IN EXPRESS_LEVEL   Level
+  );
+
+/**
+  Pop the expression options from the Stack
+
+  @param[in]  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
+  );
+
+/**
+  Reset stack pointer to begin of the stack.
+
+**/
+VOID
+ResetCurrentExpressionStack (
+  VOID
+  );
+
+/**
+  Push current expression onto the Stack
+
+  @param[in]  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
+  );
+
+/**
+  Pop current expression from the Stack
+
+  @param[in]  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
+  );
+
+/**
+  Reset stack pointer to begin of the stack.
+
+**/
+VOID
+ResetMapExpressionListStack (
+  VOID
+  );
+
+/**
+  Push the list of map expression onto the Stack
+
+  @param[in]  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
+  );
+
+/**
+  Pop the list of map expression from the Stack
+
+  @param[in]  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
+  );
+
+/**
+  Reset stack pointer to begin of the stack.
+
+**/
+VOID
+ResetScopeStack (
+  VOID
+  );
+
+/**
+  Push an Operand onto the Stack
+
+  @param[in]  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
+  );
+
+/**
+  Pop an Operand from the Stack
+
+  @param[out]  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
+  );
+
+#endif