Richard Osterloh
/
SemVer
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SemVer.h
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00001 /** 00002 * @file 00003 * @date 30 March 2015 00004 * @author Richard Osterloh <richardo@buddi.co.uk> 00005 */ 00006 #pragma once 00007 00008 #include <sstream> 00009 #include <string> 00010 00011 /** 00012 * @class SemVer 00013 * @brief A basic implementation of semantic versioning 00014 */ 00015 class SemVer { 00016 public: 00017 00018 /** 00019 * SemVer constructor 00020 * @param version string to parse as a version 00021 */ 00022 SemVer(const std::string& version) 00023 { 00024 m_version = version; 00025 m_major = 0; 00026 m_minor = 0; 00027 m_patch = 0; 00028 00029 if (version.empty()) 00030 { 00031 m_is_valid = false; 00032 } 00033 else 00034 { 00035 m_is_valid = true; 00036 parse(); 00037 } 00038 } 00039 00040 ~SemVer() {} 00041 00042 /** 00043 * Get full version 00044 */ 00045 const std::string& getVersion() const 00046 { 00047 return m_version; 00048 } 00049 00050 /** 00051 * Get the major of the version 00052 */ 00053 const int& getMajor() const 00054 { 00055 return m_major; 00056 } 00057 00058 /** 00059 * Get the minor of the version 00060 */ 00061 const int& getMinor() const 00062 { 00063 return m_minor; 00064 } 00065 00066 /** 00067 * Get the patch of the version 00068 */ 00069 const int& getPatch() const 00070 { 00071 return m_patch; 00072 } 00073 00074 /** 00075 * Check if the version is valid 00076 */ 00077 const bool& isValid() const 00078 { 00079 return m_is_valid; 00080 } 00081 00082 int compare(SemVer& rgt) 00083 { 00084 if ((*this) == rgt) 00085 { 00086 return 0; 00087 } 00088 00089 if ((*this) > rgt) 00090 { 00091 return 1; 00092 } 00093 00094 return -1; 00095 } 00096 00097 SemVer& operator= (SemVer& rgt) 00098 { 00099 if ((*this) != rgt) 00100 { 00101 this->m_version = rgt.getVersion(); 00102 this->m_major = rgt.getMajor(); 00103 this->m_minor = rgt.getMinor(); 00104 this->m_patch = rgt.getPatch(); 00105 this->m_is_valid = rgt.isValid(); 00106 } 00107 00108 return *this; 00109 } 00110 00111 friend bool operator== (SemVer &lft, SemVer &rgt) 00112 { 00113 return lft.getVersion().compare(rgt.getVersion()) == 0; 00114 } 00115 00116 friend bool operator!= (SemVer &lft, SemVer &rgt) 00117 { 00118 return !(lft == rgt); 00119 } 00120 00121 friend bool operator> (SemVer &lft, SemVer &rgt) 00122 { 00123 // Major 00124 if (lft.getMajor() < 0 && rgt.getMajor() >= 0) 00125 { 00126 return false; 00127 } 00128 00129 if (lft.getMajor() >= 0 && rgt.getMajor() < 0) 00130 { 00131 return true; 00132 } 00133 00134 if (lft.getMajor() > rgt.getMajor()) 00135 { 00136 return true; 00137 } 00138 00139 if (lft.getMajor() < rgt.getMajor()) 00140 { 00141 return false; 00142 } 00143 00144 // Minor 00145 if (lft.getMinor() < 0 && rgt.getMinor() >= 0) 00146 { 00147 return false; 00148 } 00149 00150 if (lft.getMinor() >= 0 && rgt.getMinor() < 0) 00151 { 00152 return true; 00153 } 00154 00155 if (lft.getMinor() > rgt.getMinor()) 00156 { 00157 return true; 00158 } 00159 00160 if (lft.getMinor() < rgt.getMinor()) 00161 { 00162 return false; 00163 } 00164 00165 // Patch 00166 if (lft.getPatch() < 0 && rgt.getPatch() >= 0) 00167 { 00168 return false; 00169 } 00170 00171 if (lft.getPatch() >= 0 && rgt.getPatch() < 0) 00172 { 00173 return true; 00174 } 00175 00176 if (lft.getPatch() > rgt.getPatch()) 00177 { 00178 return true; 00179 } 00180 00181 if (lft.getPatch() < rgt.getPatch()) 00182 { 00183 return false; 00184 } 00185 00186 return false; 00187 } 00188 00189 friend bool operator>= (SemVer &lft, SemVer &rgt) 00190 { 00191 return (lft > rgt) || (lft == rgt); 00192 } 00193 00194 friend bool operator< (SemVer &lft, SemVer &rgt) 00195 { 00196 return (rgt > lft); 00197 } 00198 00199 friend bool operator<= (SemVer &lft, SemVer &rgt) 00200 { 00201 return (lft < rgt) || (lft == rgt); 00202 } 00203 00204 friend std::ostream& operator<< (std::ostream& out, const SemVer& value) 00205 { 00206 out << value.getVersion(); 00207 00208 return out; 00209 } 00210 00211 private: 00212 std::string m_version; 00213 int m_major; 00214 int m_minor; 00215 int m_patch; 00216 bool m_is_valid; 00217 00218 enum m_type { 00219 TYPE_MAJOR, 00220 TYPE_MINOR, 00221 TYPE_PATCH, 00222 }; 00223 00224 void parse() 00225 { 00226 int type = TYPE_MAJOR; 00227 00228 std::string major, minor, patch; 00229 00230 for (std::size_t i = 0; i < m_version.length(); i++) 00231 { 00232 char chr = m_version[i]; 00233 int chr_dec = chr; 00234 00235 switch (type) 00236 { 00237 case TYPE_MAJOR: 00238 if (chr == '.') 00239 { 00240 type = TYPE_MINOR; 00241 continue; 00242 } 00243 00244 if (chr_dec < 48 || chr_dec > 57) 00245 { 00246 m_is_valid = false; 00247 } 00248 00249 major += chr; 00250 break; 00251 00252 case TYPE_MINOR: 00253 if (chr == '.') 00254 { 00255 type = TYPE_PATCH; 00256 continue; 00257 } 00258 00259 if (chr_dec < 48 || chr_dec > 57) 00260 { 00261 m_is_valid = false; 00262 } 00263 00264 minor += chr; 00265 break; 00266 00267 case TYPE_PATCH: 00268 if (chr_dec < 48 || chr_dec > 57) 00269 { 00270 m_is_valid = false; 00271 } 00272 00273 patch += chr; 00274 break; 00275 00276 } 00277 00278 if (m_is_valid) 00279 { 00280 std::istringstream(major) >> m_major; 00281 std::istringstream(minor) >> m_minor; 00282 std::istringstream(patch) >> m_patch; 00283 00284 if (m_major == 0 && m_minor == 0 && m_patch == 0) 00285 { 00286 m_is_valid = false; 00287 } 00288 } 00289 } 00290 } 00291 00292 };
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