[llvm-rc] Add support for parsing memory flags

Most of the handling is pretty straightforward; fetch the default
memory flags for the specific resource type before parsing the flags
and apply them on top of that, except that some flags imply others
and some flags clear more than one flag.

For icons and cursors, the flags set get passed on to all individual
single icon/cursor resources, while only some flags affect the icon/cursor
group resource.

For stringtables, the behaviour is pretty simple; the first stringtable
resource of a bundle sets the flags for the whole bundle.

The output of these tests match rc.exe byte for byte.

The actual use of these memory flags is deprecated and they have no
effect since Win16, but some resource script files may still happen
to have them in place.

Differential Revision: https://reviews.llvm.org/D46818

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332329 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/llvm-rc/ResourceScriptParser.h b/tools/llvm-rc/ResourceScriptParser.h
index 639ef63863c..8e3cc55499e 100644
--- a/tools/llvm-rc/ResourceScriptParser.h
+++ b/tools/llvm-rc/ResourceScriptParser.h
@@ -129,6 +129,8 @@ private:
   //    msdn.microsoft.com/en-us/library/windows/desktop/aa381002(v=vs.85).aspx
   enum class OptStmtType { BasicStmt, DialogStmt, DialogExStmt };
 
+  uint16_t parseMemoryFlags(uint16_t DefaultFlags);
+
   Expected<OptionalStmtList>
   parseOptionalStatements(OptStmtType StmtsType = OptStmtType::BasicStmt);