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: |
| c801d85f KB |
6 | // Created: 12.09.97 |
| 7 | // RCS-ID: $Id$ | |
| 8 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> | |
| 55d99c7a | 9 | // Licence: wxWindows licence |
| c801d85f KB |
10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | ||
| 12 | // ============================================================================ | |
| 13 | // headers | |
| 14 | // ============================================================================ | |
| 15 | ||
| 16 | #ifdef __GNUG__ | |
| 17 | #pragma implementation "dynarray.h" | |
| 18 | #endif | |
| 19 | ||
| 3096bd2f | 20 | #include "wx/wxprec.h" |
| c801d85f KB |
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 | ||
| acf88ae6 VZ |
36 | // we cast the value to long from which we cast it to void * in IndexForInsert: |
| 37 | // this can't work if the pointers are not big enough | |
| 38 | wxCOMPILE_TIME_ASSERT( sizeof(long) <= sizeof(void *), | |
| 39 | wxArraySizeOfPtrLessSizeOfLong ); // < 32 symbols | |
| 40 | ||
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41 | // ============================================================================ |
| 42 | // constants | |
| 43 | // ============================================================================ | |
| 44 | ||
| 45 | // size increment = max(50% of current size, ARRAY_MAXSIZE_INCREMENT) | |
| 46 | #define ARRAY_MAXSIZE_INCREMENT 4096 | |
| 47 | ||
| 48 | // ============================================================================ | |
| 49 | // implementation | |
| 50 | // ============================================================================ | |
| 51 | ||
| 52 | // ---------------------------------------------------------------------------- | |
| 5a1cad6e | 53 | // wxBaseArray - dynamic array of 'T's |
| c801d85f KB |
54 | // ---------------------------------------------------------------------------- |
| 55 | ||
| f1322419 | 56 | #define _WX_DEFINE_BASEARRAY(T, name) \ |
| 5a1cad6e GD |
57 | /* ctor */ \ |
| 58 | name::name() \ | |
| 59 | { \ | |
| 60 | m_nSize = \ | |
| 61 | m_nCount = 0; \ | |
| 62 | m_pItems = (T *)NULL; \ | |
| 63 | } \ | |
| 64 | \ | |
| 65 | /* copy ctor */ \ | |
| 66 | name::name(const name& src) \ | |
| 67 | { \ | |
| 68 | m_nSize = /* not src.m_nSize to save memory */ \ | |
| 69 | m_nCount = src.m_nCount; \ | |
| 70 | \ | |
| 71 | if ( m_nSize != 0 ) { \ | |
| 72 | m_pItems = new T[m_nSize]; \ | |
| 73 | /* only copy if allocation succeeded */ \ | |
| 74 | if ( m_pItems ) { \ | |
| 75 | memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(T)); \ | |
| 76 | } \ | |
| 77 | else { \ | |
| 78 | m_nSize = 0; \ | |
| 79 | } \ | |
| 80 | } \ | |
| 81 | else \ | |
| 82 | m_pItems = (T *) NULL; \ | |
| 83 | } \ | |
| 84 | \ | |
| 85 | /* assignment operator */ \ | |
| 86 | name& name::operator=(const name& src) \ | |
| 87 | { \ | |
| 88 | wxDELETEA(m_pItems); \ | |
| 89 | \ | |
| 90 | m_nSize = /* not src.m_nSize to save memory */ \ | |
| 91 | m_nCount = src.m_nCount; \ | |
| 92 | \ | |
| 93 | if ( m_nSize != 0 ){ \ | |
| 94 | m_pItems = new T[m_nSize]; \ | |
| 95 | /* only copy if allocation succeeded */ \ | |
| 96 | if ( m_pItems ) { \ | |
| 97 | memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(T)); \ | |
| 98 | } \ | |
| 99 | else { \ | |
| 100 | m_nSize = 0; \ | |
| 101 | } \ | |
| 102 | } \ | |
| 103 | else \ | |
| 104 | m_pItems = (T *) NULL; \ | |
| 105 | \ | |
| 106 | return *this; \ | |
| 107 | } \ | |
| 108 | \ | |
| 2abb9d2f VZ |
109 | /* allocate new buffer of the given size and move our data to it */ \ |
| 110 | bool name::Realloc(size_t nSize) \ | |
| 111 | { \ | |
| 112 | T *pNew = new T[nSize]; \ | |
| 113 | /* only grow if allocation succeeded */ \ | |
| 114 | if ( !pNew ) \ | |
| 115 | return false; \ | |
| 116 | \ | |
| 117 | m_nSize = nSize; \ | |
| 118 | /* copy data to new location */ \ | |
| 119 | memcpy(pNew, m_pItems, m_nCount*sizeof(T)); \ | |
| 120 | delete [] m_pItems; \ | |
| 121 | m_pItems = pNew; \ | |
| 122 | \ | |
| 123 | return true; \ | |
| 124 | } \ | |
| 125 | \ | |
| 5a1cad6e | 126 | /* grow the array */ \ |
| 3b0b5f13 | 127 | void name::Grow(size_t nIncrement) \ |
| 5a1cad6e GD |
128 | { \ |
| 129 | /* only do it if no more place */ \ | |
| 2b5f62a0 | 130 | if( (m_nCount == m_nSize) || ((m_nSize - m_nCount) < nIncrement) ) { \ |
| 5a1cad6e | 131 | if( m_nSize == 0 ) { \ |
| a1db4ad4 SN |
132 | /* was empty, determine initial size */ \ |
| 133 | size_t size = WX_ARRAY_DEFAULT_INITIAL_SIZE; \ | |
| 134 | if (size < nIncrement) size = nIncrement; \ | |
| 135 | /* allocate some memory */ \ | |
| 136 | m_pItems = new T[size]; \ | |
| 5a1cad6e GD |
137 | /* only grow if allocation succeeded */ \ |
| 138 | if ( m_pItems ) { \ | |
| a1db4ad4 | 139 | m_nSize = size; \ |
| 5a1cad6e GD |
140 | } \ |
| 141 | } \ | |
| 142 | else \ | |
| 143 | { \ | |
| 3b0b5f13 VZ |
144 | /* add at least 50% but not too much */ \ |
| 145 | size_t ndefIncrement = m_nSize < WX_ARRAY_DEFAULT_INITIAL_SIZE \ | |
| 146 | ? WX_ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1; \ | |
| 147 | if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT ) \ | |
| 148 | ndefIncrement = ARRAY_MAXSIZE_INCREMENT; \ | |
| 149 | if ( nIncrement < ndefIncrement ) \ | |
| 150 | nIncrement = ndefIncrement; \ | |
| 2abb9d2f | 151 | Realloc(m_nSize + nIncrement); \ |
| 5a1cad6e GD |
152 | } \ |
| 153 | } \ | |
| 154 | } \ | |
| 155 | \ | |
| 2abb9d2f VZ |
156 | /* make sure that the array has at least count elements */ \ |
| 157 | void name::SetCount(size_t count, T defval) \ | |
| 158 | { \ | |
| 159 | if ( m_nSize < count ) \ | |
| 160 | { \ | |
| 161 | /* need to realloc memory: don't overallocate it here as if */ \ | |
| 162 | /* SetCount() is called, it probably means that the caller */ \ | |
| 163 | /* knows in advance how many elements there will be in the */ \ | |
| 164 | /* array and so it won't be necessary to realloc it later */ \ | |
| 165 | if ( !Realloc(count) ) \ | |
| 166 | { \ | |
| 167 | /* out of memory -- what can we do? */ \ | |
| 168 | return; \ | |
| 169 | } \ | |
| 170 | } \ | |
| 171 | \ | |
| 172 | /* add new elements if we extend the array */ \ | |
| 173 | while ( m_nCount < count ) \ | |
| 174 | { \ | |
| 175 | m_pItems[m_nCount++] = defval; \ | |
| 176 | } \ | |
| 177 | } \ | |
| 178 | \ | |
| 5a1cad6e GD |
179 | /* dtor */ \ |
| 180 | name::~name() \ | |
| 181 | { \ | |
| 182 | wxDELETEA(m_pItems); \ | |
| 183 | } \ | |
| 184 | \ | |
| 185 | /* clears the list */ \ | |
| 186 | void name::Clear() \ | |
| 187 | { \ | |
| 188 | m_nSize = \ | |
| 189 | m_nCount = 0; \ | |
| 190 | \ | |
| 191 | wxDELETEA(m_pItems); \ | |
| 192 | } \ | |
| 193 | \ | |
| 194 | /* pre-allocates memory (frees the previous data!) */ \ | |
| 195 | void name::Alloc(size_t nSize) \ | |
| 196 | { \ | |
| 197 | /* only if old buffer was not big enough */ \ | |
| 198 | if ( nSize > m_nSize ) { \ | |
| 199 | wxDELETEA(m_pItems); \ | |
| 200 | m_nSize = 0; \ | |
| 201 | m_pItems = new T[nSize]; \ | |
| 202 | /* only alloc if allocation succeeded */ \ | |
| 203 | if ( m_pItems ) { \ | |
| 204 | m_nSize = nSize; \ | |
| 205 | } \ | |
| 206 | } \ | |
| 207 | \ | |
| 208 | m_nCount = 0; \ | |
| 209 | } \ | |
| 210 | \ | |
| 211 | /* minimizes the memory usage by freeing unused memory */ \ | |
| 212 | void name::Shrink() \ | |
| 213 | { \ | |
| 214 | /* only do it if we have some memory to free */ \ | |
| 215 | if( m_nCount < m_nSize ) { \ | |
| 216 | /* allocates exactly as much memory as we need */ \ | |
| 217 | T *pNew = new T[m_nCount]; \ | |
| 218 | /* only shrink if allocation succeeded */ \ | |
| 219 | if ( pNew ) { \ | |
| 220 | /* copy data to new location */ \ | |
| 221 | memcpy(pNew, m_pItems, m_nCount*sizeof(T)); \ | |
| 222 | delete [] m_pItems; \ | |
| 223 | m_pItems = pNew; \ | |
| 79e929e7 VZ |
224 | \ |
| 225 | /* update the size of the new block */ \ | |
| 226 | m_nSize = m_nCount; \ | |
| 5a1cad6e | 227 | } \ |
| 79e929e7 | 228 | /* else: don't do anything, better keep old memory block! */ \ |
| 5a1cad6e GD |
229 | } \ |
| 230 | } \ | |
| 231 | \ | |
| 232 | /* searches the array for an item (forward or backwards) */ \ | |
| 233 | int name::Index(T lItem, bool bFromEnd) const \ | |
| 234 | { \ | |
| 235 | if ( bFromEnd ) { \ | |
| 236 | if ( m_nCount > 0 ) { \ | |
| 237 | size_t n = m_nCount; \ | |
| 238 | do { \ | |
| 239 | if ( m_pItems[--n] == lItem ) \ | |
| 240 | return n; \ | |
| 241 | } \ | |
| 242 | while ( n != 0 ); \ | |
| 243 | } \ | |
| 244 | } \ | |
| 245 | else { \ | |
| 246 | for( size_t n = 0; n < m_nCount; n++ ) { \ | |
| 247 | if( m_pItems[n] == lItem ) \ | |
| 248 | return n; \ | |
| 249 | } \ | |
| 250 | } \ | |
| 251 | \ | |
| 252 | return wxNOT_FOUND; \ | |
| 253 | } \ | |
| 254 | \ | |
| 255 | /* search for a place to insert item into sorted array (binary search) */ \ | |
| 256 | size_t name::IndexForInsert(T lItem, CMPFUNC fnCompare) const \ | |
| 257 | { \ | |
| 258 | size_t i, \ | |
| 259 | lo = 0, \ | |
| 260 | hi = m_nCount; \ | |
| 261 | int res; \ | |
| 262 | \ | |
| 263 | while ( lo < hi ) { \ | |
| 264 | i = (lo + hi)/2; \ | |
| 265 | \ | |
| acf88ae6 VZ |
266 | res = (*fnCompare)((const void *)(long)lItem, \ |
| 267 | (const void *)(long)(m_pItems[i])); \ | |
| 5a1cad6e GD |
268 | if ( res < 0 ) \ |
| 269 | hi = i; \ | |
| 270 | else if ( res > 0 ) \ | |
| 271 | lo = i + 1; \ | |
| 272 | else { \ | |
| 273 | lo = i; \ | |
| 274 | break; \ | |
| 275 | } \ | |
| 276 | } \ | |
| 277 | \ | |
| 278 | return lo; \ | |
| 279 | } \ | |
| 280 | \ | |
| 281 | /* search for an item in a sorted array (binary search) */ \ | |
| 282 | int name::Index(T lItem, CMPFUNC fnCompare) const \ | |
| 283 | { \ | |
| 284 | size_t n = IndexForInsert(lItem, fnCompare); \ | |
| 285 | \ | |
| bb793b0c | 286 | return (n >= m_nCount || \ |
| 4365da58 | 287 | (*fnCompare)((const void *)(long)lItem, \ |
| bb793b0c VZ |
288 | ((const void *)(long)m_pItems[n]))) ? wxNOT_FOUND \ |
| 289 | : (int)n; \ | |
| 5a1cad6e GD |
290 | } \ |
| 291 | \ | |
| 292 | /* add item at the end */ \ | |
| 3b0b5f13 | 293 | void name::Add(T lItem, size_t nInsert) \ |
| 5a1cad6e | 294 | { \ |
| 2b5f62a0 VZ |
295 | if (nInsert == 0) \ |
| 296 | return; \ | |
| 3b0b5f13 VZ |
297 | Grow(nInsert); \ |
| 298 | for (size_t i = 0; i < nInsert; i++) \ | |
| 299 | m_pItems[m_nCount++] = lItem; \ | |
| 5a1cad6e GD |
300 | } \ |
| 301 | \ | |
| 302 | /* add item assuming the array is sorted with fnCompare function */ \ | |
| 303 | void name::Add(T lItem, CMPFUNC fnCompare) \ | |
| 304 | { \ | |
| 305 | Insert(lItem, IndexForInsert(lItem, fnCompare)); \ | |
| 306 | } \ | |
| 307 | \ | |
| 308 | /* add item at the given position */ \ | |
| 3b0b5f13 | 309 | void name::Insert(T lItem, size_t nIndex, size_t nInsert) \ |
| 5a1cad6e GD |
310 | { \ |
| 311 | wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArray::Insert") ); \ | |
| 3b0b5f13 VZ |
312 | wxCHECK_RET( m_nCount <= m_nCount + nInsert, \ |
| 313 | wxT("array size overflow in wxArray::Insert") ); \ | |
| 5a1cad6e | 314 | \ |
| 2b5f62a0 VZ |
315 | if (nInsert == 0) \ |
| 316 | return; \ | |
| 3b0b5f13 | 317 | Grow(nInsert); \ |
| 5a1cad6e | 318 | \ |
| 3b0b5f13 | 319 | memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex], \ |
| 5a1cad6e | 320 | (m_nCount - nIndex)*sizeof(T)); \ |
| 3b0b5f13 VZ |
321 | for (size_t i = 0; i < nInsert; i++) \ |
| 322 | m_pItems[nIndex + i] = lItem; \ | |
| 323 | m_nCount += nInsert; \ | |
| 5a1cad6e GD |
324 | } \ |
| 325 | \ | |
| 326 | /* removes item from array (by index) */ \ | |
| 3b0b5f13 | 327 | void name::RemoveAt(size_t nIndex, size_t nRemove) \ |
| 5a1cad6e | 328 | { \ |
| 3b0b5f13 VZ |
329 | wxCHECK_RET( nIndex < m_nCount, wxT("bad index in wxArray::RemoveAt") ); \ |
| 330 | wxCHECK_RET( nIndex + nRemove <= m_nCount, \ | |
| 331 | wxT("removing too many elements in wxArray::RemoveAt") ); \ | |
| 5a1cad6e | 332 | \ |
| 3b0b5f13 VZ |
333 | memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove], \ |
| 334 | (m_nCount - nIndex - nRemove)*sizeof(T)); \ | |
| 335 | m_nCount -= nRemove; \ | |
| 5a1cad6e GD |
336 | } \ |
| 337 | \ | |
| 338 | /* removes item from array (by value) */ \ | |
| 339 | void name::Remove(T lItem) \ | |
| 340 | { \ | |
| 341 | int iIndex = Index(lItem); \ | |
| 342 | \ | |
| 343 | wxCHECK_RET( iIndex != wxNOT_FOUND, \ | |
| 344 | wxT("removing inexistent item in wxArray::Remove") ); \ | |
| 345 | \ | |
| 346 | RemoveAt((size_t)iIndex); \ | |
| 347 | } \ | |
| 348 | \ | |
| 349 | /* sort array elements using passed comparaison function */ \ | |
| 350 | void name::Sort(CMPFUNC fCmp) \ | |
| 351 | { \ | |
| 352 | qsort(m_pItems, m_nCount, sizeof(T), fCmp); \ | |
| c801d85f KB |
353 | } |
| 354 | ||
| f1322419 VZ |
355 | _WX_DEFINE_BASEARRAY(const void *, wxBaseArrayPtrVoid) |
| 356 | _WX_DEFINE_BASEARRAY(short, wxBaseArrayShort) | |
| 357 | _WX_DEFINE_BASEARRAY(int, wxBaseArrayInt) | |
| 358 | _WX_DEFINE_BASEARRAY(long, wxBaseArrayLong) | |
| 359 | //_WX_DEFINE_BASEARRAY(double, wxBaseArrayDouble) | |
| c801d85f | 360 |