Merge pull request #7 from OpenVicProject/dataloading-event-and-functions

1 files changed, 30 insertions, 0 deletions

diff --git a/src/openvic-dataloader/detail/NullBuff.hpp b/src/openvic-dataloader/detail/NullBuff.hpp
new file mode 100644
index 0000000..baf9e1b
--- /dev/null
+++ b/src/openvic-dataloader/detail/NullBuff.hpp
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <ostream>
+
+namespace ovdl::detail {
+	template<class cT, class traits = std::char_traits<cT>>
+	class basic_nullbuf : public std::basic_streambuf<cT, traits> {
+		typename traits::int_type overflow(typename traits::int_type c) {
+			return traits::not_eof(c); // indicate success
+		}
+	};
+
+	template<class cT, class traits = std::char_traits<cT>>
+	class basic_onullstream : public std::basic_ostream<cT, traits> {
+	public:
+		basic_onullstream() : std::basic_ios<cT, traits>(&m_sbuf),
+							  std::basic_ostream<cT, traits>(&m_sbuf) {
+			std::basic_ios<cT, traits>::init(&m_sbuf);
+		}
+
+	private:
+		basic_nullbuf<cT, traits> m_sbuf;
+	};
+
+	typedef basic_onullstream<char> onullstream;
+	typedef basic_onullstream<wchar_t> wonullstream;
+
+	inline onullstream cnull;
+	inline onullstream wcnull;
+}
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