include/wx/arrstr.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        include/wx/arrstr.h
   3 // Purpose:     wxArrayString class
   4 // Author:      Mattia Barbon and Vadim Zeitlin
   5 // Modified by:
   6 // Created:     07/07/03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_ARRSTR_H
  13 #define _WX_ARRSTR_H
  14
  15 #include "wx/defs.h"
  16 #include "wx/string.h"
  17
  18 WXDLLIMPEXP_BASE int wxStringSortAscending(wxString*, wxString*);
  19 WXDLLIMPEXP_BASE int wxStringSortDescending(wxString*, wxString*);
  20
  21 #if wxUSE_STL
  22
  23 #include "wx/dynarray.h"
  24
  25 typedef int (*CMPFUNCwxString)(wxString*, wxString*);
  26 typedef wxString _wxArraywxBaseArrayStringBase;
  27 _WX_DECLARE_BASEARRAY_2(_wxArraywxBaseArrayStringBase, wxBaseArrayStringBase,
  28                         wxArray_SortFunction<wxString>,
  29                         class WXDLLIMPEXP_BASE);
  30 WX_DEFINE_USER_EXPORTED_TYPEARRAY(wxString, wxArrayStringBase,
  31                                   wxBaseArrayStringBase, WXDLLIMPEXP_BASE);
  32 _WX_DEFINE_SORTED_TYPEARRAY_2(wxString, wxSortedArrayStringBase,
  33                               wxBaseArrayStringBase, = wxStringSortAscending,
  34                               class WXDLLIMPEXP_BASE, CMPFUNCwxString);
  35
  36 class WXDLLIMPEXP_BASE wxArrayString : public wxArrayStringBase
  37 {
  38 public:
  39     wxArrayString() { }
  40     wxArrayString(const wxArrayString& a) : wxArrayStringBase(a) { }
  41
  42     int Index(const wxChar* sz, bool bCase = true, bool bFromEnd = false) const;
  43 };
  44
  45 class WXDLLIMPEXP_BASE wxSortedArrayString : public wxSortedArrayStringBase
  46 {
  47 public:
  48     wxSortedArrayString() : wxSortedArrayStringBase(wxStringSortAscending)
  49         { }
  50     wxSortedArrayString(const wxSortedArrayString& array)
  51         : wxSortedArrayStringBase(array)
  52         { }
  53     wxSortedArrayString(const wxArrayString& src)
  54         : wxSortedArrayStringBase(wxStringSortAscending)
  55     {
  56         reserve(src.size());
  57
  58         for ( size_t n = 0; n < src.size(); n++ )
  59             Add(src[n]);
  60     }
  61
  62     int Index(const wxChar* sz, bool bCase = true, bool bFromEnd = false) const;
  63 };
  64
  65 #else // if !wxUSE_STL
  66
  67 // ----------------------------------------------------------------------------
  68 // The string array uses it's knowledge of internal structure of the wxString
  69 // class to optimize string storage. Normally, we would store pointers to
  70 // string, but as wxString is, in fact, itself a pointer (sizeof(wxString) is
  71 // sizeof(char *)) we store these pointers instead. The cast to "wxString *" is
  72 // really all we need to turn such pointer into a string!
  73 //
  74 // Of course, it can be called a dirty hack, but we use twice less memory and
  75 // this approach is also more speed efficient, so it's probably worth it.
  76 //
  77 // Usage notes: when a string is added/inserted, a new copy of it is created,
  78 // so the original string may be safely deleted. When a string is retrieved
  79 // from the array (operator[] or Item() method), a reference is returned.
  80 // ----------------------------------------------------------------------------
  81
  82 class WXDLLIMPEXP_BASE wxArrayString
  83 {
  84 public:
  85   // type of function used by wxArrayString::Sort()
  86   typedef int (*CompareFunction)(const wxString& first,
  87                                  const wxString& second);
  88   // type of function used by wxArrayString::Sort(), for compatibility with
  89   // wxArray
  90   typedef int (*CompareFunction2)(wxString* first,
  91                                   wxString* second);
  92
  93   // constructors and destructor
  94     // default ctor
  95   wxArrayString()
  96       : m_nSize(0), m_nCount(0), m_pItems(NULL), m_autoSort(FALSE)
  97       { Init(FALSE); }
  98     // if autoSort is TRUE, the array is always sorted (in alphabetical order)
  99     //
 100     // NB: the reason for using int and not bool is that like this we can avoid
 101     //     using this ctor for implicit conversions from "const char *" (which
 102     //     we'd like to be implicitly converted to wxString instead!)
 103     //
 104     //     of course, using explicit would be even better - if all compilers
 105     //     supported it...
 106   wxArrayString(int autoSort)
 107       : m_nSize(0), m_nCount(0), m_pItems(NULL), m_autoSort(FALSE)
 108       { Init(autoSort != 0); }
 109     // copy ctor
 110   wxArrayString(const wxArrayString& array);
 111     // assignment operator
 112   wxArrayString& operator=(const wxArrayString& src);
 113     // not virtual, this class should not be derived from
 114  ~wxArrayString();
 115
 116   // memory management
 117     // empties the list, but doesn't release memory
 118   void Empty();
 119     // empties the list and releases memory
 120   void Clear();
 121     // preallocates memory for given number of items
 122   void Alloc(size_t nCount);
 123     // minimzes the memory usage (by freeing all extra memory)
 124   void Shrink();
 125
 126   // simple accessors
 127     // number of elements in the array
 128   size_t GetCount() const { return m_nCount; }
 129     // is it empty?
 130   bool IsEmpty() const { return m_nCount == 0; }
 131     // number of elements in the array (GetCount is preferred API)
 132   size_t Count() const { return m_nCount; }
 133
 134   // items access (range checking is done in debug version)
 135     // get item at position uiIndex
 136   wxString& Item(size_t nIndex) const
 137     {
 138         wxASSERT_MSG( nIndex < m_nCount,
 139                       _T("wxArrayString: index out of bounds") );
 140
 141         return *(wxString *)&(m_pItems[nIndex]);
 142     }
 143
 144     // same as Item()
 145   wxString& operator[](size_t nIndex) const { return Item(nIndex); }
 146     // get last item
 147   wxString& Last() const
 148   {
 149       wxASSERT_MSG( !IsEmpty(),
 150                     _T("wxArrayString: index out of bounds") );
 151       return Item(Count() - 1);
 152   }
 153
 154 #if WXWIN_COMPATIBILITY_2_4
 155     // return a wxString[], useful for the controls which
 156     // take one in their ctor.  You must delete[] it yourself
 157     // once you are done with it.  Will return NULL if the
 158     // ArrayString was empty.
 159   wxString* GetStringArray() const;
 160 #endif
 161
 162   // item management
 163     // Search the element in the array, starting from the beginning if
 164     // bFromEnd is FALSE or from end otherwise. If bCase, comparison is case
 165     // sensitive (default). Returns index of the first item matched or
 166     // wxNOT_FOUND
 167   int  Index (const wxChar *sz, bool bCase = TRUE, bool bFromEnd = FALSE) const;
 168     // add new element at the end (if the array is not sorted), return its
 169     // index
 170   size_t Add(const wxString& str, size_t nInsert = 1);
 171     // add new element at given position
 172   void Insert(const wxString& str, size_t uiIndex, size_t nInsert = 1);
 173     // expand the array to have count elements
 174   void SetCount(size_t count);
 175     // remove first item matching this value
 176   void Remove(const wxChar *sz);
 177     // remove item by index
 178 #if WXWIN_COMPATIBILITY_2_4
 179   void Remove(size_t nIndex, size_t nRemove = 1) { RemoveAt(nIndex, nRemove); }
 180 #endif
 181   void RemoveAt(size_t nIndex, size_t nRemove = 1);
 182
 183   // sorting
 184     // sort array elements in alphabetical order (or reversed alphabetical
 185     // order if reverseOrder parameter is TRUE)
 186   void Sort(bool reverseOrder = FALSE);
 187     // sort array elements using specified comparaison function
 188   void Sort(CompareFunction compareFunction);
 189   void Sort(CompareFunction2 compareFunction);
 190
 191   // comparison
 192     // compare two arrays case sensitively
 193   bool operator==(const wxArrayString& a) const;
 194     // compare two arrays case sensitively
 195   bool operator!=(const wxArrayString& a) const { return !(*this == a); }
 196
 197   // STL-like interface
 198   typedef wxString value_type;
 199   typedef value_type* pointer;
 200   typedef const value_type* const_pointer;
 201   typedef value_type* iterator;
 202   typedef const value_type* const_iterator;
 203   typedef value_type& reference;
 204   typedef const value_type& const_reference;
 205   typedef int difference_type;
 206   typedef size_t size_type;
 207
 208   // FIXME: same in dynarray.h
 209   class reverse_iterator
 210   {
 211     typedef wxString value_type;
 212     typedef value_type* pointer;
 213     typedef value_type& reference;
 214     typedef reverse_iterator itor;
 215     friend itor operator+(int o, const itor& it);
 216     friend itor operator+(const itor& it, int o);
 217     friend itor operator-(const itor& it, int o);
 218     friend difference_type operator -(const itor& i1, const itor& i2);
 219   public:
 220     pointer m_ptr;
 221     reverse_iterator() : m_ptr(NULL) { }
 222     reverse_iterator(pointer ptr) : m_ptr(ptr) { }
 223     reverse_iterator(const itor& it) : m_ptr(it.m_ptr) { }
 224     reference operator*() const { return *m_ptr; }
 225     pointer operator->() const { return m_ptr; }
 226     itor operator++() { --m_ptr; return *this; }
 227     itor operator++(int)
 228       { reverse_iterator tmp = *this; --m_ptr; return tmp; }
 229     itor operator--() { ++m_ptr; return *this; }
 230     itor operator--(int) { itor tmp = *this; ++m_ptr; return tmp; }
 231     bool operator ==(const itor& it) { return m_ptr == it.m_ptr; }
 232     bool operator !=(const itor& it) { return m_ptr != it.m_ptr; }
 233   };
 234
 235   class const_reverse_iterator
 236   {
 237     typedef wxString value_type;
 238     typedef const value_type* pointer;
 239     typedef const value_type& reference;
 240     typedef const_reverse_iterator itor;
 241     friend itor operator+(int o, const itor& it);
 242     friend itor operator+(const itor& it, int o);
 243     friend itor operator-(const itor& it, int o);
 244     friend difference_type operator -(const itor& i1, const itor& i2);
 245   public:
 246     pointer m_ptr;
 247     const_reverse_iterator() : m_ptr(NULL) { }
 248     const_reverse_iterator(pointer ptr) : m_ptr(ptr) { }
 249     const_reverse_iterator(const itor& it) : m_ptr(it.m_ptr) { }
 250     const_reverse_iterator(const reverse_iterator& it) : m_ptr(it.m_ptr) { }
 251     reference operator*() const { return *m_ptr; }
 252     pointer operator->() const { return m_ptr; }
 253     itor operator++() { --m_ptr; return *this; }
 254     itor operator++(int)
 255       { itor tmp = *this; --m_ptr; return tmp; }
 256     itor operator--() { ++m_ptr; return *this; }
 257     itor operator--(int) { itor tmp = *this; ++m_ptr; return tmp; }
 258     bool operator ==(const itor& it) { return m_ptr == it.m_ptr; }
 259     bool operator !=(const itor& it) { return m_ptr != it.m_ptr; }
 260   };
 261
 262   void assign(const_iterator first, const_iterator last);
 263   void assign(size_type n, const_reference v)
 264     { clear(); Add(v, n); }
 265   reference back() { return *(end() - 1); }
 266   const_reference back() const { return *(end() - 1); }
 267   iterator begin() { return (wxString *)&(m_pItems[0]); }
 268   const_iterator begin() const { return (wxString *)&(m_pItems[0]); }
 269   size_type capacity() const { return m_nSize; }
 270   void clear() { Clear(); }
 271   bool empty() const { return IsEmpty(); }
 272   iterator end() { return begin() + GetCount(); }
 273   const_iterator end() const { return begin() + GetCount(); }
 274   iterator erase(iterator first, iterator last)
 275   {
 276       size_t idx = first - begin();
 277       RemoveAt(idx, last - first);
 278       return begin() + idx;
 279   }
 280   iterator erase(iterator it) { return erase(it, it + 1); }
 281   reference front() { return *begin(); }
 282   const_reference front() const { return *begin(); }
 283   void insert(iterator it, size_type n, const_reference v)
 284     { Insert(v, it - begin(), n); }
 285   iterator insert(iterator it, const_reference v = value_type())
 286     { size_t idx = it - begin(); Insert(v, idx); return begin() + idx; }
 287   void insert(iterator it, const_iterator first, const_iterator last);
 288   size_type max_size() const { return INT_MAX; }
 289   void pop_back() { RemoveAt(GetCount() - 1); }
 290   void push_back(const_reference v) { Add(v); }
 291   reverse_iterator rbegin() { return reverse_iterator(end() - 1); }
 292   const_reverse_iterator rbegin() const;
 293   reverse_iterator rend() { return reverse_iterator(begin() - 1); }
 294   const_reverse_iterator rend() const;
 295   void reserve(size_type n) /* base::reserve*/;
 296   void resize(size_type n, value_type v = value_type());
 297   size_type size() const { return GetCount(); }
 298
 299 protected:
 300   void Init(bool autoSort);             // common part of all ctors
 301   void Copy(const wxArrayString& src);  // copies the contents of another array
 302
 303 private:
 304   void Grow(size_t nIncrement = 0);     // makes array bigger if needed
 305   void Free();                          // free all the strings stored
 306
 307   void DoSort();                        // common part of all Sort() variants
 308
 309   size_t  m_nSize,    // current size of the array
 310           m_nCount;   // current number of elements
 311
 312   wxChar  **m_pItems; // pointer to data
 313
 314   bool    m_autoSort; // if TRUE, keep the array always sorted
 315 };
 316
 317 class WXDLLIMPEXP_BASE wxSortedArrayString : public wxArrayString
 318 {
 319 public:
 320   wxSortedArrayString() : wxArrayString(TRUE)
 321     { }
 322   wxSortedArrayString(const wxArrayString& array) : wxArrayString(TRUE)
 323     { Copy(array); }
 324 };
 325
 326 #endif // !wxUSE_STL
 327
 328 #endif