make ast-print handle random non-printable characters correctly with octal escapes.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62337 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index ea96411..96f5403 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -663,9 +663,19 @@
// FIXME: this doesn't print wstrings right.
for (unsigned i = 0, e = Str->getByteLength(); i != e; ++i) {
- switch (Str->getStrData()[i]) {
- default: OS << Str->getStrData()[i]; break;
- // Handle some common ones to make dumps prettier.
+ unsigned char Char = Str->getStrData()[i];
+
+ switch (Char) {
+ default:
+ if (isprint(Char))
+ OS << (char)Char;
+ else // Output anything hard as an octal escape.
+ OS << '\\'
+ << (char)('0'+ ((Char >> 6) & 7))
+ << (char)('0'+ ((Char >> 3) & 7))
+ << (char)('0'+ ((Char >> 0) & 7));
+ break;
+ // Handle some common non-printable cases to make dumps prettier.
case '\\': OS << "\\\\"; break;
case '"': OS << "\\\""; break;
case '\n': OS << "\\n"; break;