ParsedValue.cpp

00001 /*
00002  * ParsedValue.cpp
00003  *
00004  * Created on: Nov 1, 2013
00005  * * Authors: Vincent Wochnik <v.wochnik@gmail.com>
00006  *
00007  * Copyright (c) 2013 Cumulocity GmbH
00008  *
00009  * Permission is hereby granted, free of charge, to any person obtaining
00010  * a copy of this software and associated documentation files (the
00011  * "Software"), to deal in the Software without restriction, including
00012  * without limitation the rights to use, copy, modify, merge, publish,
00013  * distribute, sublicense, and/or sell copies of the Software, and to
00014  * permit persons to whom the Software is furnished to do so, subject to
00015  * the following conditions:
00016  *
00017  * The above copyright notice and this permission notice shall be
00018  * included in all copies or substantial portions of the Software.
00019  *
00020  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00021  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00022  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00023  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00024  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00025  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00026  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00027  */
00028 
00029 #include "ParsedValue.h"
00030 #include "NullValue.h"
00031 #include "IntegerValue.h"
00032 #include "FloatValue.h"
00033 #include "CharValue.h"
00034 #include <stdio.h>
00035 #include <string.h>
00036 #include <ctype.h>
00037 
00038 ParsedValue::ParsedValue(const char *str, bool copy) : _value(str, copy)
00039 {
00040     if (_value.valueType() != VALUE_NULL) {
00041         _type = VALUE_CHARACTER;
00042         extractValue();
00043     } else {
00044         _type = VALUE_NULL;
00045     }
00046 }
00047 
00048 uint8_t ParsedValue::valueType() const
00049 {
00050     return _type;
00051 }
00052 
00053 long ParsedValue::integerValue() const
00054 {
00055     if (_type != VALUE_INTEGER)
00056         return 0;
00057     return _integer;
00058 }
00059 
00060 double ParsedValue::floatValue() const
00061 {
00062     if (_type != VALUE_FLOAT)
00063         return 0.0;
00064     return _float;
00065 }
00066 
00067 const char * ParsedValue::characterValue() const
00068 {
00069     if (_type != VALUE_CHARACTER)
00070         return NULL;
00071     return _value.characterValue();
00072 }
00073 
00074 size_t ParsedValue::write(AbstractDataSink& sink) const
00075 {
00076     return _value.write(sink);
00077 }
00078 
00079 size_t ParsedValue::length() const
00080 {
00081     return _value.length();
00082 }
00083 
00084 Value* ParsedValue::copy() const
00085 {
00086     if (_type == VALUE_NULL)
00087         return new NullValue();
00088     if (_type == VALUE_INTEGER)
00089         return new IntegerValue(_integer);
00090     if (_type == VALUE_FLOAT)
00091         return new FloatValue(_float, _digits, _zflag);
00092     return new CharValue(_value.characterValue(), true);
00093 }
00094 
00095 void ParsedValue::extractValue()
00096 {
00097     int len;
00098     const char *str = _value.characterValue();
00099 
00100     sscanf(str, "%li%n", &_integer, &len);
00101     if ((size_t)len == strlen(str)) {
00102         _type = VALUE_INTEGER;
00103         return;
00104     }
00105 
00106     sscanf(str, "%lf%n", &_float, &len);
00107     if ((size_t)len == strlen(str)) {
00108         bool floating = false;
00109         _digits = 0;
00110         _zflag = false;
00111         for (char c, *ptr = (char*)str; (c = *ptr) > 0; ptr++) {
00112             if (floating) {
00113                 if (c == '.')
00114                     return;
00115                 _digits++;
00116             } else {
00117                 if (c == '.')
00118                     floating = true;
00119                 else if (isdigit(c))
00120                     _zflag = true;
00121             }
00122         }
00123         if (!((floating) && (!_digits))) {
00124             _type = VALUE_FLOAT;
00125             return;
00126         }
00127     }
00128 }