Port DebugInfoPDB over to using llvm::Error.

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

llvm-svn: 268791

1 files changed, 52 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/PDB/Raw/RawError.cpp b/llvm/lib/DebugInfo/PDB/Raw/RawError.cpp
new file mode 100644
index 00000000000..aa6f15726a6
--- /dev/null
+++ b/llvm/lib/DebugInfo/PDB/Raw/RawError.cpp
@@ -0,0 +1,52 @@
+#include "llvm/DebugInfo/PDB/Raw/RawError.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+class RawErrorCategory : public std::error_category {
+public:
+  const char *name() const LLVM_NOEXCEPT override { return "llvm.pdb.raw"; }
+
+  std::string message(int Condition) const override {
+    switch (static_cast<raw_error_code>(Condition)) {
+    case raw_error_code::unspecified:
+      return "An unknown error has occurred.";
+    case raw_error_code::feature_unsupported:
+      return "The feature is unsupported by the implementation.";
+    case raw_error_code::corrupt_file:
+      return "The PDB file is corrupt.";
+    case raw_error_code::insufficient_buffer:
+      return "The buffer is not large enough to read the requested number of "
+             "bytes.";
+    }
+    llvm_unreachable("Unrecognized raw_error_code");
+  }
+};
+
+static ManagedStatic<RawErrorCategory> Category;
+
+char RawError::ID = 0;
+
+RawError::RawError(raw_error_code C) : RawError(C, "") {}
+
+RawError::RawError(const std::string &Context)
+    : RawError(raw_error_code::unspecified, Context) {}
+
+RawError::RawError(raw_error_code C, const std::string &Context) : Code(C) {
+  ErrMsg = "Native PDB Error: ";
+  std::error_code EC = convertToErrorCode();
+  if (Code != raw_error_code::unspecified)
+    ErrMsg += EC.message() + "  ";
+  if (!Context.empty())
+    ErrMsg += Context;
+}
+
+void RawError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
+
+const std::string &RawError::getErrorMessage() const { return ErrMsg; }
+
+std::error_code RawError::convertToErrorCode() const {
+  return std::error_code(static_cast<int>(Code), *Category);
+}