+
+ bool NeedPrefix = true;
+ bool NeedQuotes = false;
+ std::string Result;
+ std::string::const_iterator I = X.begin();
+ if (*I == 1) {
+ NeedPrefix = false;
+ ++I; // Skip over the marker.
+ }
+
+ // If the first character is a number, we need quotes.
+ if (*I >= '0' && *I <= '9')
+ NeedQuotes = true;
+
+ // Do an initial scan of the string, checking to see if we need quotes or
+ // to escape a '"' or not.
+ if (!NeedQuotes)
+ for (std::string::const_iterator E = X.end(); I != E; ++I)
+ if (!isCharAcceptable(*I)) {
+ NeedQuotes = true;
+ break;
+ }
+
+ // In the common case, we don't need quotes. Handle this quickly.
+ if (!NeedQuotes) {
+ if (!NeedPrefix)
+ return X.substr(1); // Strip off the \001.
+
+ Result = Prefix + X;
+
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
+
+ return Result;
+ }
+
+ Result = X.substr(0, I-X.begin());
+
+ // Otherwise, construct the string the expensive way.
+ for (std::string::const_iterator E = X.end(); I != E; ++I) {
+ if (*I == '"')
+ Result += "_QQ_";
+ else if (*I == '\n')
+ Result += "_NL_";
+ else
+ Result += *I;
+ }
+
+ if (NeedPrefix) {
+ Result = Prefix + Result;
+
+ if (PrefixTy == Mangler::Private)
+ Result = PrivatePrefix + Result;
+ else if (PrefixTy == Mangler::LinkerPrivate)
+ Result = LinkerPrivatePrefix + Result;
+ }
+
+ Result = '"' + Result + '"';
+ return Result;