clang-format: Basic escaping when outputting XML.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@250440 91177308-0d34-0410-b5e6-96231b3b80d8

tools/clang-format/ClangFormat.cpp

@@ -199,9 +199,11 @@ static bool fillRanges(MemoryBuffer *Code,
 }
 
 static void outputReplacementXML(StringRef Text) {
+  // FIXME: When we sort includes, we need to make sure the stream is correct
+  // utf-8.
   size_t From = 0;
   size_t Index;
-  while ((Index = Text.find_first_of("\n\r", From)) != StringRef::npos) {
+  while ((Index = Text.find_first_of("\n\r<&", From)) != StringRef::npos) {
     llvm::outs() << Text.substr(From, Index - From);
     switch (Text[Index]) {
     case '\n':
@@ -210,6 +212,12 @@ static void outputReplacementXML(StringRef Text) {
     case '\r':
       llvm::outs() << "&#13;";
       break;
+    case '<':
+      llvm::outs() << "&lt;";
+      break;
+    case '&':
+      llvm::outs() << "&amp;";
+      break;
     default:
       llvm_unreachable("Unexpected character encountered!");
     }