Diff: FloatValue.h

Revision:

0:099f76422485

Child:

5:2b74510900da

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FloatValue.h	Thu Jul 03 20:38:04 2014 +0200
@@ -0,0 +1,81 @@
+/*
+ * FloatValue.h
+ *
+ * Created on: Nov 1, 2013
+ * * Authors: Vincent Wochnik <v.wochnik@gmail.com>
+ *
+ * Copyright (c) 2013 Cumulocity GmbH
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef FLOATVALUE_H
+#define FLOATVALUE_H
+
+#include "config.h"
+#include <stdint.h>
+#include "Value.h"
+
+#define SMARTREST_FLOATVALUE_DETECTPREC 255
+
+/**
+ * A floating-point value.
+ * 
+ * Example:
+ * @code
+ * // decleration                       // serialized form
+ * FloatValue val1(3.1415, 2);          // 3.14
+ * FloatValue val2(3.1234, 0);          // 3
+ * FloatValue val3(3.95, 0);            // 4
+ * FloatValue val4(0.55, 1, false);     // .5
+ * FloatValue val4(0.55, 2, true);      // 0.55
+ * @encode
+ */
+class FloatValue : public Value
+{
+public:
+    /**
+     * Creates a new instance of a floating-point value.
+     * @param number the floating-point number
+     * @param digits precision in number of digits
+     * @param zflag whether to write a zero before the floating point
+     */
+    FloatValue(double, uint8_t=SMARTREST_FLOATVALUE_DETECTPREC, bool=true);
+
+    uint8_t valueType() const;
+    long integerValue() const;
+    double floatValue() const;
+    const char * characterValue() const;
+
+    size_t write(AbstractDataSink&) const;
+    size_t length() const;
+    Value* copy() const;
+
+protected:
+    uint8_t detectPrecision(double);
+
+private:
+    double _number;
+    bool _negative;
+    uint8_t _digits;
+    bool _zflag;
+};
+
+#endif