Move `DebugChar` into its own file

Change-Id: Ia40549e5d0b78ece8dd0722c3a5a032b9915f24b

1 files changed, 22 insertions, 0 deletions

diff --git a/src/libutil/escape-char.cc b/src/libutil/escape-char.cc
new file mode 100644
index 000000000..132260286
--- /dev/null
+++ b/src/libutil/escape-char.cc
@@ -0,0 +1,22 @@
+#include <boost/io/ios_state.hpp>
+#include <iomanip>
+#include <iostream>
+
+#include "escape-char.hh"
+
+namespace nix {
+
+std::ostream & operator<<(std::ostream & s, MaybeHexEscapedChar c)
+{
+    boost::io::ios_flags_saver _ifs(s);
+
+    if (isprint(c.c)) {
+        s << static_cast<char>(c.c);
+    } else {
+        s << "\\x" << std::hex << std::setfill('0') << std::setw(2)
+          << (static_cast<unsigned int>(c.c) & 0xff);
+    }
+    return s;
+}
+
+} // namespace nix