BaseTools: Update Expression.py for VOID* to support L'a' and 'a'

Original VOID* type support L"string" and "string" format, now we also
add support for single quote string that without null terminator.
Type VOID* support L'a' and 'a', the value transfer to c style value.
L'a' --> {0x61, 0x00}
L'ab' --> {0x61, 0x00, 0x62, 0x00}
'a'  --> {0x61}
'ab' --> {0x61, 0x62}

when the value is L'' or '' that not include any character, tool will
report error.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yunhua Feng <yunhuax.feng@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/BaseTools/Source/Python/Common/Misc.py b/BaseTools/Source/Python/Common/Misc.py
index b34cb4c3be..d80f645d2e 100644
--- a/BaseTools/Source/Python/Common/Misc.py
+++ b/BaseTools/Source/Python/Common/Misc.py
@@ -1572,6 +1572,8 @@ def ParseFieldValue (Value):
     if Value.startswith("L'") and Value.endswith("'"):

         # Unicode Character Constant

         List = list(Value[2:-1])

+        if len(List) == 0:

+            raise BadExpression('Length %s is %s' % (Value, len(List)))

         List.reverse()

         Value = 0

         for Char in List:

@@ -1580,6 +1582,8 @@ def ParseFieldValue (Value):
     if Value.startswith("'") and Value.endswith("'"):

         # Character constant

         List = list(Value[1:-1])

+        if len(List) == 0:

+            raise BadExpression('Length %s is %s' % (Value, len(List)))

         List.reverse()

         Value = 0

         for Char in List: