projects / wxWidgets.git / blame
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1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dynarray.cpp | |
| 3 | // Purpose: implementation of wxBaseArray class | |
| 4 | // Author: Vadim Zeitlin | |
| 3bfa4402 | 5 | // Modified by: |
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6 | // Created: 12.09.97 |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> | |
| 9 | // Licence: wxWindows license | |
| 10 | /////////////////////////////////////////////////////////////////////////////// | |
| 11 | ||
| 12 | // ============================================================================ | |
| 13 | // headers | |
| 14 | // ============================================================================ | |
| 15 | ||
| 16 | #ifdef __GNUG__ | |
| 17 | #pragma implementation "dynarray.h" | |
| 18 | #endif | |
| 19 | ||
| 3096bd2f | 20 | #include "wx/wxprec.h" |
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21 | |
| 22 | #ifdef __BORLANDC__ | |
| 23 | #pragma hdrstop | |
| 24 | #endif | |
| 25 | ||
| 26 | #include "wx/dynarray.h" | |
| 3096bd2f | 27 | #include "wx/intl.h" |
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28 | |
| 29 | #include <stdlib.h> | |
| 3bfa4402 | 30 | #include <string.h> // for memmove |
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31 | |
| 32 | #ifndef max | |
| 33 | #define max(a, b) (((a) > (b)) ? (a) : (b)) | |
| 34 | #endif | |
| 35 | ||
| 36 | // ============================================================================ | |
| 37 | // constants | |
| 38 | // ============================================================================ | |
| 39 | ||
| 40 | // size increment = max(50% of current size, ARRAY_MAXSIZE_INCREMENT) | |
| 41 | #define ARRAY_MAXSIZE_INCREMENT 4096 | |
| 42 | ||
| 43 | // ============================================================================ | |
| 44 | // implementation | |
| 45 | // ============================================================================ | |
| 46 | ||
| 47 | // ---------------------------------------------------------------------------- | |
| 5a1cad6e | 48 | // wxBaseArray - dynamic array of 'T's |
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49 | // ---------------------------------------------------------------------------- |
| 50 | ||
| f1322419 | 51 | #define _WX_DEFINE_BASEARRAY(T, name) \ |
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52 | /* ctor */ \ |
| 53 | name::name() \ | |
| 54 | { \ | |
| 55 | m_nSize = \ | |
| 56 | m_nCount = 0; \ | |
| 57 | m_pItems = (T *)NULL; \ | |
| 58 | } \ | |
| 59 | \ | |
| 60 | /* copy ctor */ \ | |
| 61 | name::name(const name& src) \ | |
| 62 | { \ | |
| 63 | m_nSize = /* not src.m_nSize to save memory */ \ | |
| 64 | m_nCount = src.m_nCount; \ | |
| 65 | \ | |
| 66 | if ( m_nSize != 0 ) { \ | |
| 67 | m_pItems = new T[m_nSize]; \ | |
| 68 | /* only copy if allocation succeeded */ \ | |
| 69 | if ( m_pItems ) { \ | |
| 70 | memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(T)); \ | |
| 71 | } \ | |
| 72 | else { \ | |
| 73 | m_nSize = 0; \ | |
| 74 | } \ | |
| 75 | } \ | |
| 76 | else \ | |
| 77 | m_pItems = (T *) NULL; \ | |
| 78 | } \ | |
| 79 | \ | |
| 80 | /* assignment operator */ \ | |
| 81 | name& name::operator=(const name& src) \ | |
| 82 | { \ | |
| 83 | wxDELETEA(m_pItems); \ | |
| 84 | \ | |
| 85 | m_nSize = /* not src.m_nSize to save memory */ \ | |
| 86 | m_nCount = src.m_nCount; \ | |
| 87 | \ | |
| 88 | if ( m_nSize != 0 ){ \ | |
| 89 | m_pItems = new T[m_nSize]; \ | |
| 90 | /* only copy if allocation succeeded */ \ | |
| 91 | if ( m_pItems ) { \ | |
| 92 | memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(T)); \ | |
| 93 | } \ | |
| 94 | else { \ | |
| 95 | m_nSize = 0; \ | |
| 96 | } \ | |
| 97 | } \ | |
| 98 | else \ | |
| 99 | m_pItems = (T *) NULL; \ | |
| 100 | \ | |
| 101 | return *this; \ | |
| 102 | } \ | |
| 103 | \ | |
| 104 | /* grow the array */ \ | |
| 105 | void name::Grow() \ | |
| 106 | { \ | |
| 107 | /* only do it if no more place */ \ | |
| 108 | if( m_nCount == m_nSize ) { \ | |
| 109 | if( m_nSize == 0 ) { \ | |
| 110 | /* was empty, alloc some memory */ \ | |
| 111 | m_pItems = new T[WX_ARRAY_DEFAULT_INITIAL_SIZE]; \ | |
| 112 | /* only grow if allocation succeeded */ \ | |
| 113 | if ( m_pItems ) { \ | |
| 114 | m_nSize = WX_ARRAY_DEFAULT_INITIAL_SIZE; \ | |
| 115 | } \ | |
| 116 | } \ | |
| 117 | else \ | |
| 118 | { \ | |
| 119 | /* add 50% but not too much */ \ | |
| 120 | size_t nIncrement = m_nSize < WX_ARRAY_DEFAULT_INITIAL_SIZE \ | |
| 121 | ? WX_ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1; \ | |
| 122 | if ( nIncrement > ARRAY_MAXSIZE_INCREMENT ) \ | |
| 123 | nIncrement = ARRAY_MAXSIZE_INCREMENT; \ | |
| 124 | T *pNew = new T[m_nSize + nIncrement]; \ | |
| 125 | /* only grow if allocation succeeded */ \ | |
| 126 | if ( pNew ) { \ | |
| 127 | m_nSize += nIncrement; \ | |
| 128 | /* copy data to new location */ \ | |
| 129 | memcpy(pNew, m_pItems, m_nCount*sizeof(T)); \ | |
| 130 | delete [] m_pItems; \ | |
| 131 | m_pItems = pNew; \ | |
| 132 | } \ | |
| 133 | } \ | |
| 134 | } \ | |
| 135 | } \ | |
| 136 | \ | |
| 137 | /* dtor */ \ | |
| 138 | name::~name() \ | |
| 139 | { \ | |
| 140 | wxDELETEA(m_pItems); \ | |
| 141 | } \ | |
| 142 | \ | |
| 143 | /* clears the list */ \ | |
| 144 | void name::Clear() \ | |
| 145 | { \ | |
| 146 | m_nSize = \ | |
| 147 | m_nCount = 0; \ | |
| 148 | \ | |
| 149 | wxDELETEA(m_pItems); \ | |
| 150 | } \ | |
| 151 | \ | |
| 152 | /* pre-allocates memory (frees the previous data!) */ \ | |
| 153 | void name::Alloc(size_t nSize) \ | |
| 154 | { \ | |
| 155 | /* only if old buffer was not big enough */ \ | |
| 156 | if ( nSize > m_nSize ) { \ | |
| 157 | wxDELETEA(m_pItems); \ | |
| 158 | m_nSize = 0; \ | |
| 159 | m_pItems = new T[nSize]; \ | |
| 160 | /* only alloc if allocation succeeded */ \ | |
| 161 | if ( m_pItems ) { \ | |
| 162 | m_nSize = nSize; \ | |
| 163 | } \ | |
| 164 | } \ | |
| 165 | \ | |
| 166 | m_nCount = 0; \ | |
| 167 | } \ | |
| 168 | \ | |
| 169 | /* minimizes the memory usage by freeing unused memory */ \ | |
| 170 | void name::Shrink() \ | |
| 171 | { \ | |
| 172 | /* only do it if we have some memory to free */ \ | |
| 173 | if( m_nCount < m_nSize ) { \ | |
| 174 | /* allocates exactly as much memory as we need */ \ | |
| 175 | T *pNew = new T[m_nCount]; \ | |
| 176 | /* only shrink if allocation succeeded */ \ | |
| 177 | if ( pNew ) { \ | |
| 178 | /* copy data to new location */ \ | |
| 179 | memcpy(pNew, m_pItems, m_nCount*sizeof(T)); \ | |
| 180 | delete [] m_pItems; \ | |
| 181 | m_pItems = pNew; \ | |
| 182 | } \ | |
| 183 | } \ | |
| 184 | } \ | |
| 185 | \ | |
| 186 | /* searches the array for an item (forward or backwards) */ \ | |
| 187 | int name::Index(T lItem, bool bFromEnd) const \ | |
| 188 | { \ | |
| 189 | if ( bFromEnd ) { \ | |
| 190 | if ( m_nCount > 0 ) { \ | |
| 191 | size_t n = m_nCount; \ | |
| 192 | do { \ | |
| 193 | if ( m_pItems[--n] == lItem ) \ | |
| 194 | return n; \ | |
| 195 | } \ | |
| 196 | while ( n != 0 ); \ | |
| 197 | } \ | |
| 198 | } \ | |
| 199 | else { \ | |
| 200 | for( size_t n = 0; n < m_nCount; n++ ) { \ | |
| 201 | if( m_pItems[n] == lItem ) \ | |
| 202 | return n; \ | |
| 203 | } \ | |
| 204 | } \ | |
| 205 | \ | |
| 206 | return wxNOT_FOUND; \ | |
| 207 | } \ | |
| 208 | \ | |
| 209 | /* search for a place to insert item into sorted array (binary search) */ \ | |
| 210 | size_t name::IndexForInsert(T lItem, CMPFUNC fnCompare) const \ | |
| 211 | { \ | |
| 212 | size_t i, \ | |
| 213 | lo = 0, \ | |
| 214 | hi = m_nCount; \ | |
| 215 | int res; \ | |
| 216 | \ | |
| 217 | while ( lo < hi ) { \ | |
| 218 | i = (lo + hi)/2; \ | |
| 219 | \ | |
| f1322419 | 220 | res = (*fnCompare)((const void *)lItem, (const void *)(m_pItems[i])); \ |
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221 | if ( res < 0 ) \ |
| 222 | hi = i; \ | |
| 223 | else if ( res > 0 ) \ | |
| 224 | lo = i + 1; \ | |
| 225 | else { \ | |
| 226 | lo = i; \ | |
| 227 | break; \ | |
| 228 | } \ | |
| 229 | } \ | |
| 230 | \ | |
| 231 | return lo; \ | |
| 232 | } \ | |
| 233 | \ | |
| 234 | /* search for an item in a sorted array (binary search) */ \ | |
| 235 | int name::Index(T lItem, CMPFUNC fnCompare) const \ | |
| 236 | { \ | |
| 237 | size_t n = IndexForInsert(lItem, fnCompare); \ | |
| 238 | \ | |
| 239 | return n < m_nCount && m_pItems[n] == lItem ? (int)n : wxNOT_FOUND; \ | |
| 240 | } \ | |
| 241 | \ | |
| 242 | /* add item at the end */ \ | |
| 243 | void name::Add(T lItem) \ | |
| 244 | { \ | |
| 245 | Grow(); \ | |
| 246 | m_pItems[m_nCount++] = lItem; \ | |
| 247 | } \ | |
| 248 | \ | |
| 249 | /* add item assuming the array is sorted with fnCompare function */ \ | |
| 250 | void name::Add(T lItem, CMPFUNC fnCompare) \ | |
| 251 | { \ | |
| 252 | Insert(lItem, IndexForInsert(lItem, fnCompare)); \ | |
| 253 | } \ | |
| 254 | \ | |
| 255 | /* add item at the given position */ \ | |
| 256 | void name::Insert(T lItem, size_t nIndex) \ | |
| 257 | { \ | |
| 258 | wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArray::Insert") ); \ | |
| 259 | \ | |
| 260 | Grow(); \ | |
| 261 | \ | |
| 262 | memmove(&m_pItems[nIndex + 1], &m_pItems[nIndex], \ | |
| 263 | (m_nCount - nIndex)*sizeof(T)); \ | |
| 264 | m_pItems[nIndex] = lItem; \ | |
| 265 | m_nCount++; \ | |
| 266 | } \ | |
| 267 | \ | |
| 268 | /* removes item from array (by index) */ \ | |
| 269 | void name::RemoveAt(size_t nIndex) \ | |
| 270 | { \ | |
| 271 | wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArray::RemoveAt") ); \ | |
| 272 | \ | |
| 273 | memmove(&m_pItems[nIndex], &m_pItems[nIndex + 1], \ | |
| 274 | (m_nCount - nIndex - 1)*sizeof(T)); \ | |
| 275 | m_nCount--; \ | |
| 276 | } \ | |
| 277 | \ | |
| 278 | /* removes item from array (by value) */ \ | |
| 279 | void name::Remove(T lItem) \ | |
| 280 | { \ | |
| 281 | int iIndex = Index(lItem); \ | |
| 282 | \ | |
| 283 | wxCHECK_RET( iIndex != wxNOT_FOUND, \ | |
| 284 | wxT("removing inexistent item in wxArray::Remove") ); \ | |
| 285 | \ | |
| 286 | RemoveAt((size_t)iIndex); \ | |
| 287 | } \ | |
| 288 | \ | |
| 289 | /* sort array elements using passed comparaison function */ \ | |
| 290 | void name::Sort(CMPFUNC fCmp) \ | |
| 291 | { \ | |
| 292 | qsort(m_pItems, m_nCount, sizeof(T), fCmp); \ | |
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293 | } |
| 294 | ||
| f1322419 VZ |
295 | _WX_DEFINE_BASEARRAY(const void *, wxBaseArrayPtrVoid) |
| 296 | _WX_DEFINE_BASEARRAY(short, wxBaseArrayShort) | |
| 297 | _WX_DEFINE_BASEARRAY(int, wxBaseArrayInt) | |
| 298 | _WX_DEFINE_BASEARRAY(long, wxBaseArrayLong) | |
| 299 | //_WX_DEFINE_BASEARRAY(double, wxBaseArrayDouble) | |
| c801d85f | 300 |