1 /* 2 www.sourceforge.net/projects/tinyxml 3 4 This software is provided 'as-is', without any express or implied 5 warranty. In no event will the authors be held liable for any 6 damages arising from the use of this software. 7 8 Permission is granted to anyone to use this software for any 9 purpose, including commercial applications, and to alter it and 10 redistribute it freely, subject to the following restrictions: 11 12 1. The origin of this software must not be misrepresented; you must 13 not claim that you wrote the original software. If you use this 14 software in a product, an acknowledgment in the product documentation 15 would be appreciated but is not required. 16 17 2. Altered source versions must be plainly marked as such, and 18 must not be misrepresented as being the original software. 19 20 3. This notice may not be removed or altered from any source 21 distribution. 22 */ 23 24 25 #ifndef TIXML_USE_STL 26 27 #ifndef TIXML_STRING_INCLUDED 28 #define TIXML_STRING_INCLUDED 29 30 #include <assert.h> 31 #include <string.h> 32 33 /* The support for explicit isn't that universal, and it isn't really 34 required - it is used to check that the TiXmlString class isn't incorrectly 35 used. Be nice to old compilers and macro it here: 36 */ 37 #if defined(_MSC_VER) && (_MSC_VER >= 1200 ) 38 // Microsoft visual studio, version 6 and higher. 39 #define TIXML_EXPLICIT explicit 40 #elif defined(__GNUC__) && (__GNUC__ >= 3 ) 41 // GCC version 3 and higher.s 42 #define TIXML_EXPLICIT explicit 43 #else 44 #define TIXML_EXPLICIT 45 #endif 46 47 48 /* 49 TiXmlString is an emulation of a subset of the std::string template. 50 Its purpose is to allow compiling TinyXML on compilers with no or poor STL support. 51 Only the member functions relevant to the TinyXML project have been implemented. 52 The buffer allocation is made by a simplistic power of 2 like mechanism : if we increase 53 a string and there's no more room, we allocate a buffer twice as big as we need. 54 */ 55 class TiXmlString 56 { 57 public : 58 // The size type used 59 typedef size_t size_type; 60 61 // Error value for find primitive 62 static const size_type npos; // = -1; 63 64 65 // TiXmlString empty constructor 66 TiXmlString () : rep_(&nullrep_) 67 { 68 } 69 70 // TiXmlString copy constructor 71 TiXmlString ( const TiXmlString & copy) : rep_(0) 72 { 73 init(copy.length()); 74 memcpy(start(), copy.data(), length()); 75 } 76 77 // TiXmlString constructor, based on a string 78 TIXML_EXPLICIT TiXmlString ( const char * copy) : rep_(0) 79 { 80 init( static_cast<size_type>( strlen(copy) )); 81 memcpy(start(), copy, length()); 82 } 83 84 // TiXmlString constructor, based on a string 85 TIXML_EXPLICIT TiXmlString ( const char * str, size_type len) : rep_(0) 86 { 87 init(len); 88 memcpy(start(), str, len); 89 } 90 91 // TiXmlString destructor 92 ~TiXmlString () 93 { 94 quit(); 95 } 96 97 TiXmlString& operator = (const char * copy) 98 { 99 return assign( copy, (size_type)strlen(copy)); 100 } 101 102 TiXmlString& operator = (const TiXmlString & copy) 103 { 104 return assign(copy.start(), copy.length()); 105 } 106 107 108 // += operator. Maps to append 109 TiXmlString& operator += (const char * suffix) 110 { 111 return append(suffix, static_cast<size_type>( strlen(suffix) )); 112 } 113 114 // += operator. Maps to append 115 TiXmlString& operator += (char single) 116 { 117 return append(&single, 1); 118 } 119 120 // += operator. Maps to append 121 TiXmlString& operator += (const TiXmlString & suffix) 122 { 123 return append(suffix.data(), suffix.length()); 124 } 125 126 127 // Convert a TiXmlString into a null-terminated char * 128 const char * c_str () const { return rep_->str; } 129 130 // Convert a TiXmlString into a char * (need not be null terminated). 131 const char * data () const { return rep_->str; } 132 133 // Return the length of a TiXmlString 134 size_type length () const { return rep_->size; } 135 136 // Alias for length() 137 size_type size () const { return rep_->size; } 138 139 // Checks if a TiXmlString is empty 140 bool empty () const { return rep_->size == 0; } 141 142 // Return capacity of string 143 size_type capacity () const { return rep_->capacity; } 144 145 146 // single char extraction 147 const char& at (size_type index) const 148 { 149 assert( index < length() ); 150 return rep_->str[ index ]; 151 } 152 153 // [] operator 154 char& operator [] (size_type index) const 155 { 156 assert( index < length() ); 157 return rep_->str[ index ]; 158 } 159 160 // find a char in a string. Return TiXmlString::npos if not found 161 size_type find (char lookup) const 162 { 163 return find(lookup, 0); 164 } 165 166 // find a char in a string from an offset. Return TiXmlString::npos if not found 167 size_type find (char tofind, size_type offset) const 168 { 169 if (offset >= length()) return npos; 170 171 for (const char* p = c_str() + offset; *p != '\0'; ++p) 172 { 173 if (*p == tofind) return static_cast< size_type >( p - c_str() ); 174 } 175 return npos; 176 } 177 178 void clear () 179 { 180 //Lee: 181 //The original was just too strange, though correct: 182 // TiXmlString().swap(*this); 183 //Instead use the quit & re-init: 184 quit(); 185 init(0,0); 186 } 187 188 /* Function to reserve a big amount of data when we know we'll need it. Be aware that this 189 function DOES NOT clear the content of the TiXmlString if any exists. 190 */ 191 void reserve (size_type cap); 192 193 TiXmlString& assign (const char* str, size_type len); 194 195 TiXmlString& append (const char* str, size_type len); 196 197 void swap (TiXmlString& other) 198 { 199 Rep* r = rep_; 200 rep_ = other.rep_; 201 other.rep_ = r; 202 } 203 204 private: 205 206 void init(size_type sz) { init(sz, sz); } 207 void set_size(size_type sz) { rep_->str[ rep_->size = sz ] = '\0'; } 208 char* start() const { return rep_->str; } 209 char* finish() const { return rep_->str + rep_->size; } 210 211 struct Rep 212 { 213 size_type size, capacity; 214 char str[1]; 215 }; 216 217 void init(size_type sz, size_type cap) 218 { 219 if (cap) 220 { 221 // Lee: the original form: 222 // rep_ = static_cast<Rep*>(operator new(sizeof(Rep) + cap)); 223 // doesn't work in some cases of new being overloaded. Switching 224 // to the normal allocation, although use an 'int' for systems 225 // that are overly picky about structure alignment. 226 const size_type bytesNeeded = sizeof(Rep) + cap; 227 const size_type intsNeeded = ( bytesNeeded + sizeof(int) - 1 ) / sizeof( int ); 228 rep_ = reinterpret_cast<Rep*>( new int[ intsNeeded ] ); 229 230 rep_->str[ rep_->size = sz ] = '\0'; 231 rep_->capacity = cap; 232 } 233 else 234 { 235 rep_ = &nullrep_; 236 } 237 } 238 239 void quit() 240 { 241 if (rep_ != &nullrep_) 242 { 243 // The rep_ is really an array of ints. (see the allocator, above). 244 // Cast it back before delete, so the compiler won't incorrectly call destructors. 245 delete [] ( reinterpret_cast<int*>( rep_ ) ); 246 } 247 } 248 249 Rep * rep_; 250 static Rep nullrep_; 251 252 } ; 253 254 255 inline bool operator == (const TiXmlString & a, const TiXmlString & b) 256 { 257 return ( a.length() == b.length() ) // optimization on some platforms 258 && ( strcmp(a.c_str(), b.c_str()) == 0 ); // actual compare 259 } 260 inline bool operator < (const TiXmlString & a, const TiXmlString & b) 261 { 262 return strcmp(a.c_str(), b.c_str()) < 0; 263 } 264 265 inline bool operator != (const TiXmlString & a, const TiXmlString & b) { return !(a == b); } 266 inline bool operator > (const TiXmlString & a, const TiXmlString & b) { return b < a; } 267 inline bool operator <= (const TiXmlString & a, const TiXmlString & b) { return !(b < a); } 268 inline bool operator >= (const TiXmlString & a, const TiXmlString & b) { return !(a < b); } 269 270 inline bool operator == (const TiXmlString & a, const char* b) { return strcmp(a.c_str(), b) == 0; } 271 inline bool operator == (const char* a, const TiXmlString & b) { return b == a; } 272 inline bool operator != (const TiXmlString & a, const char* b) { return !(a == b); } 273 inline bool operator != (const char* a, const TiXmlString & b) { return !(b == a); } 274 275 TiXmlString operator + (const TiXmlString & a, const TiXmlString & b); 276 TiXmlString operator + (const TiXmlString & a, const char* b); 277 TiXmlString operator + (const char* a, const TiXmlString & b); 278 279 280 /* 281 TiXmlOutStream is an emulation of std::ostream. It is based on TiXmlString. 282 Only the operators that we need for TinyXML have been developped. 283 */ 284 class TiXmlOutStream : public TiXmlString 285 { 286 public : 287 288 // TiXmlOutStream << operator. 289 TiXmlOutStream & operator << (const TiXmlString & in) 290 { 291 *this += in; 292 return *this; 293 } 294 295 // TiXmlOutStream << operator. 296 TiXmlOutStream & operator << (const char * in) 297 { 298 *this += in; 299 return *this; 300 } 301 302 } ; 303 304 #endif // TIXML_STRING_INCLUDED 305 #endif // TIXML_USE_STL 306
