+/**\r
+ Get bit field value from the buffer and then set the value for the question.\r
+ Note: Data type UINT32 can cover all the bit field value.\r
+\r
+ @param Question The question refer to bit field.\r
+ @param Buffer Point to the buffer which the question value get from.\r
+\r
+**/\r
+VOID\r
+GetBitsQuestionValue (\r
+ IN FORM_BROWSER_STATEMENT *Question,\r
+ IN UINT8 *Buffer\r
+ )\r
+{\r
+ UINTN StartBit;\r
+ UINTN EndBit;\r
+ UINT32 RetVal;\r
+ UINT32 BufferValue;\r
+\r
+ StartBit = Question->BitVarOffset % 8;\r
+ EndBit = StartBit + Question->BitStorageWidth - 1;\r
+\r
+ CopyMem ((UINT8 *)&BufferValue, Buffer, Question->StorageWidth);\r
+\r
+ RetVal = BitFieldRead32 (BufferValue, StartBit, EndBit);\r
+\r
+ //\r
+ // Set question value.\r
+ // Note: Since Question with BufferValue (orderedlist, password, string)are not supported to refer bit field.\r
+ // Only oneof/checkbox/oneof can support bit field.So we can copy the value to the Hiivalue of Question directly.\r
+ //\r
+ CopyMem ((UINT8 *)&Question->HiiValue.Value, (UINT8 *)&RetVal, Question->StorageWidth);\r
+}\r
+\r
+/**\r
+ Set bit field value to the buffer.\r
+ Note: Data type UINT32 can cover all the bit field value.\r
+\r
+ @param Question The question refer to bit field.\r
+ @param Buffer Point to the buffer which the question value set to.\r
+ @param Value The bit field value need to set.\r
+\r
+**/\r
+VOID\r
+SetBitsQuestionValue (\r
+ IN FORM_BROWSER_STATEMENT *Question,\r
+ IN OUT UINT8 *Buffer,\r
+ IN UINT32 Value\r
+ )\r
+{\r
+ UINT32 Operand;\r
+ UINTN StartBit;\r
+ UINTN EndBit;\r
+ UINT32 RetVal;\r
+\r
+ StartBit = Question->BitVarOffset % 8;\r
+ EndBit = StartBit + Question->BitStorageWidth - 1;\r
+\r
+ CopyMem ((UINT8 *)&Operand, Buffer, Question->StorageWidth);\r
+\r
+ RetVal = BitFieldWrite32 (Operand, StartBit, EndBit, Value);\r
+\r
+ CopyMem (Buffer, (UINT8 *)&RetVal, Question->StorageWidth);\r
+}\r
+\r
+/**\r
+ Convert the buffer value to HiiValue.\r
+\r
+ @param Question The question.\r
+ @param Value Unicode buffer save the question value.\r
+\r
+ @retval Status whether convert the value success.\r
+\r
+**/\r
+EFI_STATUS\r
+BufferToValue (\r
+ IN OUT FORM_BROWSER_STATEMENT *Question,\r
+ IN CHAR16 *Value\r
+ )\r
+{\r
+ CHAR16 *StringPtr;\r
+ BOOLEAN IsBufferStorage;\r
+ CHAR16 *DstBuf;\r
+ CHAR16 TempChar;\r
+ UINTN LengthStr;\r
+ UINT8 *Dst;\r
+ CHAR16 TemStr[5];\r
+ UINTN Index;\r
+ UINT8 DigitUint8;\r
+ BOOLEAN IsString;\r
+ UINTN Length;\r
+ EFI_STATUS Status;\r
+ UINT8 *Buffer;\r
+\r
+ Buffer = NULL;\r
+\r
+ IsString = (BOOLEAN)((Question->HiiValue.Type == EFI_IFR_TYPE_STRING) ? TRUE : FALSE);\r
+ if ((Question->Storage->Type == EFI_HII_VARSTORE_BUFFER) ||\r
+ (Question->Storage->Type == EFI_HII_VARSTORE_EFI_VARIABLE_BUFFER))\r
+ {\r
+ IsBufferStorage = TRUE;\r
+ } else {\r
+ IsBufferStorage = FALSE;\r
+ }\r
+\r
+ //\r
+ // Question Value is provided by Buffer Storage or NameValue Storage\r
+ //\r
+ if (Question->BufferValue != NULL) {\r
+ //\r
+ // This Question is password or orderedlist\r
+ //\r
+ Dst = Question->BufferValue;\r
+ } else {\r
+ //\r
+ // Other type of Questions\r
+ //\r
+ if (Question->QuestionReferToBitField) {\r
+ Buffer = (UINT8 *)AllocateZeroPool (Question->StorageWidth);\r
+ if (Buffer == NULL) {\r
+ return EFI_OUT_OF_RESOURCES;\r
+ }\r
+\r
+ Dst = Buffer;\r
+ } else {\r
+ Dst = (UINT8 *)&Question->HiiValue.Value;\r
+ }\r
+ }\r
+\r
+ //\r
+ // Temp cut at the end of this section, end with '\0' or '&'.\r
+ //\r
+ StringPtr = Value;\r
+ while (*StringPtr != L'\0' && *StringPtr != L'&') {\r
+ StringPtr++;\r
+ }\r
+\r
+ TempChar = *StringPtr;\r
+ *StringPtr = L'\0';\r
+\r
+ LengthStr = StrLen (Value);\r
+\r
+ //\r
+ // Value points to a Unicode hexadecimal string, we need to convert the string to the value with CHAR16/UINT8...type.\r
+ // When generating the Value string, we follow this rule: 1 byte -> 2 Unicode characters (for string: 2 byte(CHAR16) ->4 Unicode characters).\r
+ // So the maximum value string length of a question is : Question->StorageWidth * 2.\r
+ // If the value string length > Question->StorageWidth * 2, only set the string length as Question->StorageWidth * 2, then convert.\r
+ //\r
+ if (LengthStr > (UINTN)Question->StorageWidth * 2) {\r
+ Length = (UINTN)Question->StorageWidth * 2;\r
+ } else {\r
+ Length = LengthStr;\r
+ }\r
+\r
+ Status = EFI_SUCCESS;\r
+ if (!IsBufferStorage && IsString) {\r
+ //\r
+ // Convert Config String to Unicode String, e.g "0041004200430044" => "ABCD"\r
+ // Add string tail char L'\0' into Length\r
+ //\r
+ DstBuf = (CHAR16 *)Dst;\r
+ ZeroMem (TemStr, sizeof (TemStr));\r
+ for (Index = 0; Index < Length; Index += 4) {\r
+ StrnCpyS (TemStr, sizeof (TemStr) / sizeof (CHAR16), Value + Index, 4);\r
+ DstBuf[Index/4] = (CHAR16)StrHexToUint64 (TemStr);\r
+ }\r
+\r
+ //\r
+ // Add tailing L'\0' character\r
+ //\r
+ DstBuf[Index/4] = L'\0';\r
+ } else {\r
+ ZeroMem (TemStr, sizeof (TemStr));\r
+ for (Index = 0; Index < Length; Index++) {\r
+ TemStr[0] = Value[LengthStr - Index - 1];\r
+ DigitUint8 = (UINT8)StrHexToUint64 (TemStr);\r
+ if ((Index & 1) == 0) {\r
+ Dst[Index/2] = DigitUint8;\r
+ } else {\r
+ Dst[Index/2] = (UINT8)((DigitUint8 << 4) + Dst[Index/2]);\r
+ }\r
+ }\r
+ }\r
+\r
+ *StringPtr = TempChar;\r
+\r
+ if ((Buffer != NULL) && Question->QuestionReferToBitField) {\r
+ GetBitsQuestionValue (Question, Buffer);\r
+ FreePool (Buffer);\r
+ }\r
+\r
+ return Status;\r
+}\r