implement transcript-style log

1 files changed, 27 insertions, 0 deletions

diff --git a/frontend/print.h b/frontend/print.h
new file mode 100644
index 0000000..6b526ae
--- /dev/null
+++ b/frontend/print.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <cstring>
+#include <memory>
+#include <functional>
+#include <string>
+
+void lprtf(const char * fmt, ...);
+
+class SessionLog {
+public:
+	static SessionLog & get();
+
+private:
+	SessionLog();
+	virtual ~SessionLog() = default;
+
+public:
+	virtual void append(const std::string & str);
+	virtual void append(const char * str);
+	virtual void append(const char * buf, size_t buf_size);
+
+private:
+	std::unique_ptr<FILE, std::function<void(FILE*)>> file = nullptr;
+	static constexpr bool enable = true;
+};
+