1 /* 2 www.sourceforge.net/projects/tinyxml 3 Original file by Yves Berquin. 4 5 This software is provided 'as-is', without any express or implied 6 warranty. In no event will the authors be held liable for any 7 damages arising from the use of this software. 8 9 Permission is granted to anyone to use this software for any 10 purpose, including commercial applications, and to alter it and 11 redistribute it freely, subject to the following restrictions: 12 13 1. The origin of this software must not be misrepresented; you must 14 not claim that you wrote the original software. If you use this 15 software in a product, an acknowledgment in the product documentation 16 would be appreciated but is not required. 17 18 2. Altered source versions must be plainly marked as such, and 19 must not be misrepresented as being the original software. 20 21 3. This notice may not be removed or altered from any source 22 distribution. 23 */ 24 25 /* 26 * THIS FILE WAS ALTERED BY Tyge Lovset, 7. April 2005. 27 * 28 * - completely rewritten. compact, clean, and fast implementation. 29 * - sizeof(TiXmlString) = pointer size (4 bytes on 32-bit systems) 30 * - fixed reserve() to work as per specification. 31 * - fixed buggy compares operator==(), operator<(), and operator>() 32 * - fixed operator+=() to take a const ref argument, following spec. 33 * - added "copy" constructor with length, and most compare operators. 34 * - added swap(), clear(), size(), capacity(), operator+(). 35 */ 36 37 #ifndef TIXML_USE_STL 38 39 #ifndef TIXML_STRING_INCLUDED 40 #define TIXML_STRING_INCLUDED 41 42 #include <assert.h> 43 #include <string.h> 44 45 /* 46 TiXmlString is an emulation of a subset of the std::string template. 47 Its purpose is to allow compiling TinyXML on compilers with no or poor STL support. 48 Only the member functions relevant to the TinyXML project have been implemented. 49 The buffer allocation is made by a simplistic power of 2 like mechanism : if we increase 50 a string and there's no more room, we allocate a buffer twice as big as we need. 51 */ 52 class TiXmlString 53 { 54 public : 55 // The size type used 56 typedef unsigned int size_type; 57 58 // Error value for find primitive 59 static const size_type npos; // = -1; 60 61 62 // TiXmlString empty constructor 63 TiXmlString () : rep_(&nullrep_) 64 { 65 } 66 67 // TiXmlString copy constructor 68 TiXmlString (const TiXmlString & copy) 69 { 70 init(copy.length()); 71 memcpy(start(), copy.data(), length()); 72 } 73 74 // TiXmlString constructor, based on a string 75 TiXmlString (const char * copy) 76 { 77 init( static_cast<size_type>( strlen(copy) )); 78 memcpy(start(), copy, length()); 79 } 80 81 // TiXmlString constructor, based on a string 82 TiXmlString (const char * str, size_type len) 83 { 84 init(len); 85 memcpy(start(), str, len); 86 } 87 88 // TiXmlString destructor 89 ~TiXmlString () 90 { 91 quit(); 92 } 93 94 // = operator 95 TiXmlString& operator = (const char * copy) 96 { 97 return assign( copy, (size_type)strlen(copy)); 98 } 99 100 // = operator 101 TiXmlString& operator = (const TiXmlString & copy) 102 { 103 return assign(copy.start(), copy.length()); 104 } 105 106 107 // += operator. Maps to append 108 TiXmlString& operator += (const char * suffix) 109 { 110 return append(suffix, static_cast<size_type>( strlen(suffix) )); 111 } 112 113 // += operator. Maps to append 114 TiXmlString& operator += (char single) 115 { 116 return append(&single, 1); 117 } 118 119 // += operator. Maps to append 120 TiXmlString& operator += (const TiXmlString & suffix) 121 { 122 return append(suffix.data(), suffix.length()); 123 } 124 125 126 // Convert a TiXmlString into a null-terminated char * 127 const char * c_str () const { return rep_->str; } 128 129 // Convert a TiXmlString into a char * (need not be null terminated). 130 const char * data () const { return rep_->str; } 131 132 // Return the length of a TiXmlString 133 size_type length () const { return rep_->size; } 134 135 // Alias for length() 136 size_type size () const { return rep_->size; } 137 138 // Checks if a TiXmlString is empty 139 bool empty () const { return rep_->size == 0; } 140 141 // Return capacity of string 142 size_type capacity () const { return rep_->capacity; } 143 144 145 // single char extraction 146 const char& at (size_type index) const 147 { 148 assert( index < length() ); 149 return rep_->str[ index ]; 150 } 151 152 // [] operator 153 char& operator [] (size_type index) const 154 { 155 assert( index < length() ); 156 return rep_->str[ index ]; 157 } 158 159 // find a char in a string. Return TiXmlString::npos if not found 160 size_type find (char lookup) const 161 { 162 return find(lookup, 0); 163 } 164 165 // find a char in a string from an offset. Return TiXmlString::npos if not found 166 size_type find (char tofind, size_type offset) const 167 { 168 if (offset >= length()) return npos; 169 170 for (const char* p = c_str() + offset; *p != '\0'; ++p) 171 { 172 if (*p == tofind) return static_cast< size_type >( p - c_str() ); 173 } 174 return npos; 175 } 176 177 void clear () 178 { 179 //Lee: 180 //The original was just too strange, though correct: 181 // TiXmlString().swap(*this); 182 //Instead use the quit & re-init: 183 quit(); 184 init(0,0); 185 } 186 187 /* Function to reserve a big amount of data when we know we'll need it. Be aware that this 188 function DOES NOT clear the content of the TiXmlString if any exists. 189 */ 190 void reserve (size_type cap); 191 192 TiXmlString& assign (const char* str, size_type len); 193 194 TiXmlString& append (const char* str, size_type len); 195 196 void swap (TiXmlString& other) 197 { 198 Rep* r = rep_; 199 rep_ = other.rep_; 200 other.rep_ = r; 201 } 202 203 private: 204 205 void init(size_type sz) { init(sz, sz); } 206 void set_size(size_type sz) { rep_->str[ rep_->size = sz ] = '\0'; } 207 char* start() const { return rep_->str; } 208 char* finish() const { return rep_->str + rep_->size; } 209 210 struct Rep 211 { 212 size_type size, capacity; 213 char str[1]; 214 }; 215 216 void init(size_type sz, size_type cap) 217 { 218 if (cap) 219 { 220 rep_ = static_cast<Rep*>(operator new(sizeof(Rep) + cap)); 221 rep_->str[ rep_->size = sz ] = '\0'; 222 rep_->capacity = cap; 223 } 224 else 225 { 226 rep_ = &nullrep_; 227 } 228 } 229 230 void quit() 231 { 232 if (rep_ != &nullrep_) 233 { 234 operator delete(rep_); 235 } 236 } 237 238 Rep * rep_; 239 static Rep nullrep_; 240 241 } ; 242 243 244 inline bool operator == (const TiXmlString & a, const TiXmlString & b) 245 { 246 return ( a.length() == b.length() ) // optimization on some platforms 247 && ( strcmp(a.c_str(), b.c_str()) == 0 ); // actual compare 248 } 249 inline bool operator < (const TiXmlString & a, const TiXmlString & b) 250 { 251 return strcmp(a.c_str(), b.c_str()) < 0; 252 } 253 254 inline bool operator != (const TiXmlString & a, const TiXmlString & b) { return !(a == b); } 255 inline bool operator > (const TiXmlString & a, const TiXmlString & b) { return b < a; } 256 inline bool operator <= (const TiXmlString & a, const TiXmlString & b) { return !(b < a); } 257 inline bool operator >= (const TiXmlString & a, const TiXmlString & b) { return !(a < b); } 258 259 inline bool operator == (const TiXmlString & a, const char* b) { return strcmp(a.c_str(), b) == 0; } 260 inline bool operator == (const char* a, const TiXmlString & b) { return b == a; } 261 inline bool operator != (const TiXmlString & a, const char* b) { return !(a == b); } 262 inline bool operator != (const char* a, const TiXmlString & b) { return !(b == a); } 263 264 TiXmlString operator + (const TiXmlString & a, const TiXmlString & b); 265 TiXmlString operator + (const TiXmlString & a, const char* b); 266 TiXmlString operator + (const char* a, const TiXmlString & b); 267 268 269 /* 270 TiXmlOutStream is an emulation of std::ostream. It is based on TiXmlString. 271 Only the operators that we need for TinyXML have been developped. 272 */ 273 class TiXmlOutStream : public TiXmlString 274 { 275 public : 276 277 // TiXmlOutStream << operator. 278 TiXmlOutStream & operator << (const TiXmlString & in) 279 { 280 *this += in; 281 return *this; 282 } 283 284 // TiXmlOutStream << operator. 285 TiXmlOutStream & operator << (const char * in) 286 { 287 *this += in; 288 return *this; 289 } 290 291 } ; 292 293 #endif // TIXML_STRING_INCLUDED 294 #endif // TIXML_USE_STL 295
