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CharValue.cpp

00001 /*
00002  * CharValue.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 "CharValue.h"
00030 #include "NullValue.h"
00031 #include <stdlib.h>
00032 #include <string.h>
00033 #include <ctype.h>
00034 
00035 
00036 /*-------------------------------------------------------------------------*/
00037 CharValue::CharValue(const char *str, bool copy)
00038 {
00039     if ((str == NULL) || (*str == '\0'))
00040     {
00041         _alloc = false;
00042         _str = NULL;
00043     }
00044     else
00045     {
00046         _alloc = copy;
00047         if (copy)
00048         {
00049             _str = (const char*)malloc(strlen(str)*sizeof(char));
00050             if (_str == NULL)
00051                 return;
00052             strcpy((char*)_str, str);
00053             _escape = escapeCheck();
00054         }
00055         else
00056         {
00057             _str = str;
00058             _escape = escapeCheck();
00059         }
00060     }
00061 }
00062 /*-------------------------------------------------------------------------*/
00063 CharValue::~CharValue()
00064 {
00065     if (_alloc)
00066         free((void*)_str);
00067 }
00068 /*-------------------------------------------------------------------------*/
00069 uint8_t CharValue::valueType() const
00070 {
00071     if (_str == NULL)
00072         return VALUE_NULL;
00073     return VALUE_CHARACTER;
00074 }
00075 /*-------------------------------------------------------------------------*/
00076 long CharValue::integerValue() const
00077 {
00078     return 0;
00079 }
00080 /*-------------------------------------------------------------------------*/
00081 double CharValue::floatValue() const
00082 {
00083     return 0.0;
00084 }
00085 /*-------------------------------------------------------------------------*/
00086 const char * CharValue::characterValue() const
00087 {
00088     return _str;
00089 }
00090 /*-------------------------------------------------------------------------*/
00091 size_t CharValue::write(AbstractDataSink& sink) const
00092 {
00093     size_t n;
00094     const char *ptr; char c;
00095 
00096     if (_str == NULL)
00097         return 0;
00098 
00099     n = 0;
00100     if (_escape)
00101         n += sink.write('"');
00102 
00103     for (ptr = _str; (c = *ptr) != '\0'; ptr++)
00104     {
00105         if ((_escape) && (c == '"'))
00106             n += sink.write('"');
00107         n += sink.write(c);
00108     }
00109 
00110     if (_escape)
00111         n += sink.write('"');
00112     return n;
00113 }
00114 /*-------------------------------------------------------------------------*/
00115 size_t CharValue::length() const
00116 {
00117     size_t n;
00118     const char *ptr; char c;
00119 
00120     if (_str == NULL)
00121         return 0;
00122 
00123     n = 0;
00124     if (_escape)
00125         n += 2;
00126 
00127     for (ptr = _str; (c = *ptr) != '\0'; ptr++)
00128     {
00129         if ((_escape) && (c == '"'))
00130             n++;
00131         n++;
00132     }
00133 
00134     return n;
00135 }
00136 /*-------------------------------------------------------------------------*/
00137 Value* CharValue::copy() const
00138 {
00139     if (_str == NULL)
00140         return new NullValue();
00141     return new CharValue(_str, true);
00142 }
00143 /*-------------------------------------------------------------------------*/
00144 bool CharValue::escapeCheck()
00145 {
00146     const char *ptr = _str;
00147     char c = '\0';
00148 
00149     while (*ptr != '\0') {
00150         c = *ptr;
00151         if ((isspace(c)) && ((ptr == _str) || (c != ' ')))
00152             return true;
00153         else if ((c == '"') || (c == ','))
00154             return true;
00155         ptr++;
00156     }
00157     if (isspace(c))
00158         return true;
00159     else
00160         return false;
00161 }
00162 /*-------------------------------------------------------------------------*/