version 5.4.0

remove CORS default header from PIHTTPServer
fix several docs
fix PIMathVector::dot return type
add units directory with PIUnits facility

libs/main/units/piunits_value.h

@@ -0,0 +1,81 @@
+/*! \file piunits_value.h
+ * \ingroup Core
+ * \~\brief
+ * \~english Unit value
+ * \~russian Единица измерения
+ */
+/*
+    PIP - Platform Independent Primitives
+    Unit value
+    Ivan Pelipenko peri4ko@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef PIUNITS_VALUE_H
+#define PIUNITS_VALUE_H
+
+#include "piunits_base.h"
+
+
+namespace PIUnits {
+/*
+    enum class Angle {
+        Degree = 0x200,
+        Radian,
+    };
+    enum class Time {
+        Second = 0x300,
+        Hertz,
+    };
+    enum class Temperature {
+        Kelvin = 0x400,
+        Celsius,
+        Fahrenheit,
+    };
+    enum class Pressure {
+        Pascal = 0x500,
+    };
+    enum class Distance {
+        Meter = 0x500,
+    };
+};
+*/
+class PIP_EXPORT Value {
+public:
+	Value(double v = 0., int t = Class::Invalid);
+
+	bool isValid() const { return m_type >= 0 && m_class; }
+	bool isNotValid() const { return m_type < 0 || !m_class; }
+
+	double value() const { return m_value; }
+	PIString toString(char format = 'g', int prec = 5) const;
+
+	bool convert(int type_to);
+	Value converted(int type_to);
+
+private:
+	double m_value                       = 0.;
+	int m_type                           = -1;
+	Class::Internal::ClassBase * m_class = nullptr;
+};
+
+}; // namespace PIUnits
+
+inline PICout operator<<(PICout s, const PIUnits::Value & v) {
+	s << v.toString();
+	return s;
+}
+
+#endif