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-rw-r--r--src/libexpr/value-to-json.cc3
-rw-r--r--src/libexpr/value-to-json.hh5
2 files changed, 8 insertions, 0 deletions
diff --git a/src/libexpr/value-to-json.cc b/src/libexpr/value-to-json.cc
index a2004df5c..d1ec9b566 100644
--- a/src/libexpr/value-to-json.cc
+++ b/src/libexpr/value-to-json.cc
@@ -3,6 +3,7 @@
#include "util.hh"
#include <cstdlib>
+#include <iomanip>
namespace nix {
@@ -16,6 +17,8 @@ void escapeJSON(std::ostream & str, const string & s)
else if (*i == '\n') str << "\\n";
else if (*i == '\r') str << "\\r";
else if (*i == '\t') str << "\\t";
+ else if (*i >= 0 && *i < 32)
+ str << "\\u" << std::setfill('0') << std::setw(4) << std::hex << (uint16_t) *i << std::dec;
else str << *i;
str << "\"";
}
diff --git a/src/libexpr/value-to-json.hh b/src/libexpr/value-to-json.hh
index e3a97efe4..f6796f205 100644
--- a/src/libexpr/value-to-json.hh
+++ b/src/libexpr/value-to-json.hh
@@ -36,6 +36,11 @@ struct JSONObject
attr(s);
escapeJSON(str, t);
}
+ void attr(const string & s, int n)
+ {
+ attr(s);
+ str << n;
+ }
};
struct JSONList