[dsymutil] Escape HTML special characters in plist.

When printing string in the Plist, we weren't escaping the characters
which lead to invalid XML. This patch adds the escape logic to
StringExtras.

rdar://39785334

llvm-svn: 333565

1 files changed, 17 insertions, 0 deletions

diff --git a/llvm/lib/Support/StringExtras.cpp b/llvm/lib/Support/StringExtras.cpp
index f4933150d28..d8f8ff4f604 100644
--- a/llvm/lib/Support/StringExtras.cpp
+++ b/llvm/lib/Support/StringExtras.cpp
@@ -68,6 +68,23 @@ void llvm::PrintEscapedString(StringRef Name, raw_ostream &Out) {
   }
 }
 
+void llvm::PrintHTMLEscaped(StringRef String, raw_ostream &Out) {
+  for (char C : String) {
+    if (C == '&')
+      Out << "&amp;";
+    else if (C == '<')
+      Out << "&lt;";
+    else if (C == '>')
+      Out << "&gt;";
+    else if (C == '\"')
+      Out << "&quot;";
+    else if (C == '\'')
+      Out << "&apos;";
+    else
+      Out << C;
+  }
+}
+
 void llvm::printLowerCase(StringRef String, raw_ostream &Out) {
   for (const char C : String)
     Out << toLower(C);