Initial import

include/c11log/details/fast_oss.h

@@ -0,0 +1,76 @@
+#pragma once
+
+#include<streambuf>
+#include<string>
+namespace c11log {
+namespace details {
+
+class str_devicebuf:public std::streambuf {
+public:
+    str_devicebuf()
+    {
+        _str.reserve(128);
+    }
+
+    const std::string& str_ref()
+    {
+        return _str;
+    }
+
+    void clear()
+    {
+        _str.clear();
+    }
+
+protected:
+    virtual int sync() override
+    {
+        return 0;
+    }
+
+    virtual std::streamsize xsputn(const char_type* s, std::streamsize count) override
+    {
+        _str.append(s, static_cast<unsigned int>(count));
+        return count;
+    }
+
+    virtual int_type overflow(int_type ch) override
+    {
+        if (ch != traits_type::eof())
+            _str.append((char*)&ch, 1);
+        return 1;
+    }
+private:
+    std::string _str;
+};
+
+class fast_oss:public std::ostream {
+public:
+    fast_oss():std::ostream(&_dev)
+    {}
+    ~fast_oss()
+    {}
+
+    const std::string& str_ref() const
+    {
+        auto mydevice = static_cast<str_devicebuf*>(rdbuf());
+        return mydevice->str_ref();
+    }
+
+    const std::string str() const
+    {
+        auto mydevice = static_cast<str_devicebuf*>(rdbuf());
+        return mydevice->str_ref();
+    }
+
+    void clear()
+    {
+        auto mydevice = static_cast<str_devicebuf*>(rdbuf());
+        mydevice->clear();
+    }
+private:
+    str_devicebuf _dev;
+
+};
+}
+}