refactor SourceRange printing out of Verifier.cpp into methods on SourceRange and SourceLoc.

Swift SVN r1752

lib/Basic/SourceLoc.cpp

@@ -0,0 +1,59 @@
+//===--- SourceLoc.cpp - SourceLoc and SourceRange implementations --------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+#include "swift/Basic/SourceLoc.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/SourceMgr.h"
+using namespace swift;
+
+void SourceLoc::print(raw_ostream &OS, const llvm::SourceMgr &SM) const {
+  if (isInvalid()) {
+    OS << "<invalid loc>";
+    return;
+  }
+  int BufferIndex = SM.FindBufferContainingLoc(Value);
+  if (BufferIndex == -1) {
+    OS << "<malformed loc>";
+    return;
+  }
+  
+  const llvm::MemoryBuffer *Buffer = SM.getMemoryBuffer((unsigned)BufferIndex);
+  const char *BufferStart = Buffer->getBufferStart();
+  OS << Buffer->getBufferIdentifier() << ':'
+     << (Value.getPointer() - BufferStart);
+}
+
+void SourceLoc::dump(const llvm::SourceMgr &SM) const {
+  print(llvm::errs(), SM);
+}
+
+void SourceRange::print(raw_ostream &OS, const llvm::SourceMgr &SM) const {
+  OS << '[';
+  Start.print(OS, SM);
+  OS << " - ";
+  End.print(OS, SM);
+  OS << ']';
+  
+  if (Start.isInvalid() || End.isInvalid())
+    return;
+  
+  OS << " RangeText=\""
+     << StringRef(Start.Value.getPointer(),
+                  End.Value.getPointer() - Start.Value.getPointer())
+     << '"';
+}
+
+void SourceRange::dump(const llvm::SourceMgr &SM) const {
+  print(llvm::errs(), SM);
+}
+