Add functions that have been added to MdePkg/UefiLib.
* GetVariable2()
* GetEfiGlobalVariable2
Cc: Sean Brogan <sean.bro...@microsoft.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Liming Gao <liming....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kin...@intel.com>
---
.../Library/FrameworkUefiLib/UefiLib.c | 102 +++++++++++++++++++++
1 file changed, 102 insertions(+)
diff --git a/IntelFrameworkPkg/Library/FrameworkUefiLib/UefiLib.c
b/IntelFrameworkPkg/Library/FrameworkUefiLib/UefiLib.c
index 845f6ea173..895ff39fc1 100644
--- a/IntelFrameworkPkg/Library/FrameworkUefiLib/UefiLib.c
+++ b/IntelFrameworkPkg/Library/FrameworkUefiLib/UefiLib.c
@@ -1338,6 +1338,108 @@ GetEfiGlobalVariable (
return GetVariable (Name, &gEfiGlobalVariableGuid);
}
+/**
+ Returns the status whether get the variable success. The function retrieves
+ variable through the UEFI Runtime Service GetVariable(). The
+ returned buffer is allocated using AllocatePool(). The caller is responsible
+ for freeing this buffer with FreePool().
+
+ If Name is NULL, then ASSERT().
+ If Guid is NULL, then ASSERT().
+ If Value is NULL, then ASSERT().
+
+ @param[in] Name The pointer to a Null-terminated Unicode string.
+ @param[in] Guid The pointer to an EFI_GUID structure
+ @param[out] Value The buffer point saved the variable info.
+ @param[out] Size The buffer size of the variable.
+
+ @return EFI_OUT_OF_RESOURCES Allocate buffer failed.
+ @return EFI_SUCCESS Find the specified variable.
+ @return Others Errors Return errors from call to
gRT->GetVariable.
+
+**/
+EFI_STATUS
+EFIAPI
+GetVariable2 (
+ IN CONST CHAR16 *Name,
+ IN CONST EFI_GUID *Guid,
+ OUT VOID **Value,
+ OUT UINTN *Size OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ UINTN BufferSize;
+
+ ASSERT (Name != NULL && Guid != NULL && Value != NULL);
+
+ //
+ // Try to get the variable size.
+ //
+ BufferSize = 0;
+ *Value = NULL;
+ if (Size != NULL) {
+ *Size = 0;
+ }
+
+ Status = gRT->GetVariable ((CHAR16 *) Name, (EFI_GUID *) Guid, NULL,
&BufferSize, *Value);
+ if (Status != EFI_BUFFER_TOO_SMALL) {
+ return Status;
+ }
+
+ //
+ // Allocate buffer to get the variable.
+ //
+ *Value = AllocatePool (BufferSize);
+ ASSERT (*Value != NULL);
+ if (*Value == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ //
+ // Get the variable data.
+ //
+ Status = gRT->GetVariable ((CHAR16 *) Name, (EFI_GUID *) Guid, NULL,
&BufferSize, *Value);
+ if (EFI_ERROR (Status)) {
+ FreePool(*Value);
+ *Value = NULL;
+ }
+
+ if (Size != NULL) {
+ *Size = BufferSize;
+ }
+
+ return Status;
+}
+
+/**
+ Returns a pointer to an allocated buffer that contains the contents of a
+ variable retrieved through the UEFI Runtime Service GetVariable(). This
+ function always uses the EFI_GLOBAL_VARIABLE GUID to retrieve variables.
+ The returned buffer is allocated using AllocatePool(). The caller is
+ responsible for freeing this buffer with FreePool().
+
+ If Name is NULL, then ASSERT().
+ If Value is NULL, then ASSERT().
+
+ @param[in] Name The pointer to a Null-terminated Unicode string.
+ @param[out] Value The buffer point saved the variable info.
+ @param[out] Size The buffer size of the variable.
+
+ @return EFI_OUT_OF_RESOURCES Allocate buffer failed.
+ @return EFI_SUCCESS Find the specified variable.
+ @return Others Errors Return errors from call to
gRT->GetVariable.
+
+**/
+EFI_STATUS
+EFIAPI
+GetEfiGlobalVariable2 (
+ IN CONST CHAR16 *Name,
+ OUT VOID **Value,
+ OUT UINTN *Size OPTIONAL
+ )
+{
+ return GetVariable2 (Name, &gEfiGlobalVariableGuid, Value, Size);
+}
/**
Returns a pointer to an allocated buffer that contains the best matching
language
--
2.14.2.windows.3
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