Port DebugInfoPDB over to using llvm::Error.

Differential Revision: http://reviews.llvm.org/D19940
Reviewed By: rnk

llvm-svn: 268791

1 files changed, 56 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/PDB/DIA/DIAError.cpp b/llvm/lib/DebugInfo/PDB/DIA/DIAError.cpp
new file mode 100644
index 00000000000..647446be577
--- /dev/null
+++ b/llvm/lib/DebugInfo/PDB/DIA/DIAError.cpp
@@ -0,0 +1,56 @@
+#include "llvm/DebugInfo/PDB/DIA/DIAError.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+class DIAErrorCategory : public std::error_category {
+public:
+  const char *name() const LLVM_NOEXCEPT override { return "llvm.pdb.dia"; }
+
+  std::string message(int Condition) const override {
+    switch (static_cast<dia_error_code>(Condition)) {
+    case dia_error_code::could_not_create_impl:
+      return "Failed to connect to DIA at runtime.  Verify that Visual Studio "
+             "is properly installed, or that msdiaXX.dll is in your PATH.";
+    case dia_error_code::invalid_file_format:
+      return "Unable to load PDB.  The file has an unrecognized format.";
+    case dia_error_code::invalid_parameter:
+      return "The parameter is incorrect.";
+    case dia_error_code::already_loaded:
+      return "Unable to load the PDB or EXE, because it is already loaded.";
+    case dia_error_code::debug_info_mismatch:
+      return "The PDB file and the EXE file do not match.";
+    case dia_error_code::unspecified:
+      return "An unknown error has occurred.";
+    }
+    llvm_unreachable("Unrecognized DIAErrorCode");
+  }
+};
+
+static ManagedStatic<DIAErrorCategory> Category;
+
+char DIAError::ID = 0;
+
+DIAError::DIAError(dia_error_code C) : DIAError(C, "") {}
+
+DIAError::DIAError(const std::string &Context)
+    : DIAError(dia_error_code::unspecified, Context) {}
+
+DIAError::DIAError(dia_error_code C, const std::string &Context) : Code(C) {
+  ErrMsg = "DIA Error: ";
+  std::error_code EC = convertToErrorCode();
+  if (Code != dia_error_code::unspecified)
+    ErrMsg += EC.message() + "  ";
+  if (!Context.empty())
+    ErrMsg += Context;
+}
+
+void DIAError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
+
+const std::string &DIAError::getErrorMessage() const { return ErrMsg; }
+
+std::error_code DIAError::convertToErrorCode() const {
+  return std::error_code(static_cast<int>(Code), *Category);
+}