Generic SmartRest library
Dependents: SmartRestUnitTest MbedSmartRest MbedSmartRestStreaming
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 00034 inline int8_t __charvalue_need_escape(const char *str); 00035 00036 CharValue::CharValue(const char *str, bool copy) 00037 { 00038 if ((str == NULL) || (strlen(str) == 0)) { 00039 _alloc = false; 00040 _str = NULL; 00041 } else { 00042 _alloc = copy; 00043 if (copy) { 00044 _str = (const char*)malloc(strlen(str)*sizeof(char)); 00045 strcpy((char*)_str, str); 00046 } else { 00047 _str = str; 00048 } 00049 } 00050 } 00051 00052 CharValue::~CharValue() 00053 { 00054 if (_alloc) 00055 free((void*)_str); 00056 } 00057 00058 uint8_t CharValue::valueType() const 00059 { 00060 if (_str == NULL) 00061 return VALUE_NULL; 00062 return VALUE_CHARACTER; 00063 } 00064 00065 long CharValue::integerValue() const 00066 { 00067 return 0; 00068 } 00069 00070 double CharValue::floatValue() const 00071 { 00072 return 0.0; 00073 } 00074 00075 const char * CharValue::characterValue() const 00076 { 00077 return _str; 00078 } 00079 00080 size_t CharValue::write(AbstractDataSink& sink) const 00081 { 00082 if (_str == NULL) 00083 return 0; 00084 size_t n = 0; 00085 int8_t esc = __charvalue_need_escape(_str) ? 1 : 0; 00086 if (esc) n += sink.write('"'); 00087 for (char *q = (char*)_str, c; (c = *q) > 0; q++) { 00088 if ((esc) && (c == '"')) 00089 n += sink.write('"'); 00090 n += sink.write(c); 00091 } 00092 if (esc) n += sink.write('"'); 00093 return n; 00094 } 00095 00096 size_t CharValue::length() const 00097 { 00098 if (_str == NULL) 00099 return 0; 00100 size_t n = 0; 00101 int8_t esc = __charvalue_need_escape(_str) ? 1 : 0; 00102 if (esc) 00103 n += 2; 00104 for (char *q = (char*)_str, c; (c = *q) > 0; q++) { 00105 if ((esc) && (c == '"')) 00106 n++; 00107 n++; 00108 } 00109 return n; 00110 } 00111 00112 int8_t __charvalue_need_escape(const char *str) 00113 { 00114 int8_t w = 0; 00115 for (char c; (c = *str) > 0; str++) { 00116 if ((c == ' ') || (c == '\t')) { 00117 if (w == 0) 00118 return 1; 00119 w = 2; 00120 } else { 00121 w = 1; 00122 if ((c == '"') || (c == ',') || (c == '\r') || (c == '\n')) 00123 return 1; 00124 } 00125 } 00126 if (w == 2) 00127 return 1; 00128 return 0; 00129 } 00130 00131 Value* CharValue::copy() const 00132 { 00133 if (_str == NULL) 00134 return new NullValue(); 00135 return new CharValue(_str, true); 00136 } 00137
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