Shapeworks Studio  2.1
Shape analysis software suite
tinystr.h
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 */
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 */
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