1 files changed, 15 insertions, 0 deletions
diff --git a/apps/SoilMoistureIo.h b/apps/SoilMoistureIo.h
index 5324114..3e78f46 100644
--- a/apps/SoilMoistureIo.h
+++ b/apps/SoilMoistureIo.h
@@ -31,6 +31,10 @@ enum class sample_format_type {
 
 string to_string(const sample_format_type &arg);
 
+std::ostream& operator<<(std::ostream& os, sample_format_type const& type);
+
+std::istream& operator>>(std::istream& is, sample_format_type& type);
+
 class SampleStreamParser;
 
 class SampleOutputStream;
@@ -270,6 +274,17 @@ private:
     shared_ptr<ostream> stream;
 };
 
+class KeyValueSampleOutputStream : public SampleOutputStream {
+public:
+    KeyValueSampleOutputStream(shared_ptr<ostream> stream, KeyDictionary &dict);
+
+    void write(SampleRecord sample) override;
+
+private:
+    KeyDictionary &dict;
+    shared_ptr<ostream> stream;
+};
+
 class SqlSampleOutputStream : public SampleOutputStream {
 public:
     SqlSampleOutputStream(shared_ptr<ostream> stream, KeyDictionary &dict, string table_name);