[msf] Resubmit "Rename Msf -> MSF".

Previously this change was submitted from a Windows machine, so
changes made to the case of filenames and directory names did
not survive the commit, and as a result the CMake source file
names and the on-disk file names did not match on case-sensitive
file systems.

I'm resubmitting this patch from a Linux system, which hopefully
allows the case changes to make it through unfettered.

llvm-svn: 277213

1 files changed, 70 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/MSF/MSFError.cpp b/llvm/lib/DebugInfo/MSF/MSFError.cpp
new file mode 100644
index 00000000000..5272cad3890
--- /dev/null
+++ b/llvm/lib/DebugInfo/MSF/MSFError.cpp
@@ -0,0 +1,70 @@
+//===- MSFError.cpp - Error extensions for MSF files ------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/MSF/MSFError.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/ManagedStatic.h"
+
+using namespace llvm;
+using namespace llvm::msf;
+
+namespace {
+// FIXME: This class is only here to support the transition to llvm::Error. It
+// will be removed once this transition is complete. Clients should prefer to
+// deal with the Error value directly, rather than converting to error_code.
+class MSFErrorCategory : public std::error_category {
+public:
+  const char *name() const LLVM_NOEXCEPT override { return "llvm.msf"; }
+
+  std::string message(int Condition) const override {
+    switch (static_cast<msf_error_code>(Condition)) {
+    case msf_error_code::unspecified:
+      return "An unknown error has occurred.";
+    case msf_error_code::insufficient_buffer:
+      return "The buffer is not large enough to read the requested number of "
+             "bytes.";
+    case msf_error_code::not_writable:
+      return "The specified stream is not writable.";
+    case msf_error_code::no_stream:
+      return "The specified stream does not exist.";
+    case msf_error_code::invalid_format:
+      return "The data is in an unexpected format.";
+    case msf_error_code::block_in_use:
+      return "The block is already in use.";
+    }
+    llvm_unreachable("Unrecognized msf_error_code");
+  }
+};
+} // end anonymous namespace
+
+static ManagedStatic<MSFErrorCategory> Category;
+
+char MSFError::ID = 0;
+
+MSFError::MSFError(msf_error_code C) : MSFError(C, "") {}
+
+MSFError::MSFError(const std::string &Context)
+    : MSFError(msf_error_code::unspecified, Context) {}
+
+MSFError::MSFError(msf_error_code C, const std::string &Context) : Code(C) {
+  ErrMsg = "MSF Error: ";
+  std::error_code EC = convertToErrorCode();
+  if (Code != msf_error_code::unspecified)
+    ErrMsg += EC.message() + "  ";
+  if (!Context.empty())
+    ErrMsg += Context;
+}
+
+void MSFError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; }
+
+const std::string &MSFError::getErrorMessage() const { return ErrMsg; }
+
+std::error_code MSFError::convertToErrorCode() const {
+  return std::error_code(static_cast<int>(Code), *Category);
+}