| | 1 | /////////////////////////////////////////////////////////////////////////////// |
| | 2 | // Name: dynarray.cpp |
| | 3 | // Purpose: implementation of wxBaseArray class |
| | 4 | // Author: Vadim Zeitlin |
| | 5 | // Modified by: |
| | 6 | // Created: 12.09.97 |
| | 7 | // RCS-ID: $Id$ |
| | 8 | // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr> |
| | 9 | // Licence: wxWindows licence |
| | 10 | /////////////////////////////////////////////////////////////////////////////// |
| | 11 | |
| | 12 | // ============================================================================ |
| | 13 | // headers |
| | 14 | // ============================================================================ |
| | 15 | |
| | 16 | #ifdef __GNUG__ |
| | 17 | #pragma implementation "dynarray.h" |
| | 18 | #endif |
| | 19 | |
| | 20 | #include "wx/wxprec.h" |
| | 21 | |
| | 22 | #ifdef __BORLANDC__ |
| | 23 | #pragma hdrstop |
| | 24 | #endif |
| | 25 | |
| | 26 | #include "wx/dynarray.h" |
| | 27 | #include "wx/intl.h" |
| | 28 | |
| | 29 | #include <stdlib.h> |
| | 30 | #include <string.h> // for memmove |
| | 31 | |
| | 32 | #ifndef max |
| | 33 | #define max(a, b) (((a) > (b)) ? (a) : (b)) |
| | 34 | #endif |
| | 35 | |
| | 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 | |
| | 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 | // ---------------------------------------------------------------------------- |
| | 53 | // wxBaseArray - dynamic array of 'T's |
| | 54 | // ---------------------------------------------------------------------------- |
| | 55 | |
| | 56 | #define _WX_DEFINE_BASEARRAY(T, name) \ |
| | 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 | \ |
| | 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 | \ |
| | 126 | /* grow the array */ \ |
| | 127 | void name::Grow(size_t nIncrement) \ |
| | 128 | { \ |
| | 129 | /* only do it if no more place */ \ |
| | 130 | if( (m_nCount == m_nSize) || ((m_nSize - m_nCount) < nIncrement) ) { \ |
| | 131 | if( m_nSize == 0 ) { \ |
| | 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]; \ |
| | 137 | /* only grow if allocation succeeded */ \ |
| | 138 | if ( m_pItems ) { \ |
| | 139 | m_nSize = size; \ |
| | 140 | } \ |
| | 141 | } \ |
| | 142 | else \ |
| | 143 | { \ |
| | 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; \ |
| | 151 | Realloc(m_nSize + nIncrement); \ |
| | 152 | } \ |
| | 153 | } \ |
| | 154 | } \ |
| | 155 | \ |
| | 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 | \ |
| | 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; \ |
| | 224 | \ |
| | 225 | /* update the size of the new block */ \ |
| | 226 | m_nSize = m_nCount; \ |
| | 227 | } \ |
| | 228 | /* else: don't do anything, better keep old memory block! */ \ |
| | 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 | \ |
| | 266 | res = (*fnCompare)((const void *)(long)lItem, \ |
| | 267 | (const void *)(long)(m_pItems[i])); \ |
| | 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 | \ |
| | 286 | return (n >= m_nCount || \ |
| | 287 | (*fnCompare)((const void *)(long)lItem, \ |
| | 288 | ((const void *)(long)m_pItems[n]))) ? wxNOT_FOUND \ |
| | 289 | : (int)n; \ |
| | 290 | } \ |
| | 291 | \ |
| | 292 | /* add item at the end */ \ |
| | 293 | void name::Add(T lItem, size_t nInsert) \ |
| | 294 | { \ |
| | 295 | if (nInsert == 0) \ |
| | 296 | return; \ |
| | 297 | Grow(nInsert); \ |
| | 298 | for (size_t i = 0; i < nInsert; i++) \ |
| | 299 | m_pItems[m_nCount++] = lItem; \ |
| | 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 */ \ |
| | 309 | void name::Insert(T lItem, size_t nIndex, size_t nInsert) \ |
| | 310 | { \ |
| | 311 | wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArray::Insert") ); \ |
| | 312 | wxCHECK_RET( m_nCount <= m_nCount + nInsert, \ |
| | 313 | wxT("array size overflow in wxArray::Insert") ); \ |
| | 314 | \ |
| | 315 | if (nInsert == 0) \ |
| | 316 | return; \ |
| | 317 | Grow(nInsert); \ |
| | 318 | \ |
| | 319 | memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex], \ |
| | 320 | (m_nCount - nIndex)*sizeof(T)); \ |
| | 321 | for (size_t i = 0; i < nInsert; i++) \ |
| | 322 | m_pItems[nIndex + i] = lItem; \ |
| | 323 | m_nCount += nInsert; \ |
| | 324 | } \ |
| | 325 | \ |
| | 326 | /* removes item from array (by index) */ \ |
| | 327 | void name::RemoveAt(size_t nIndex, size_t nRemove) \ |
| | 328 | { \ |
| | 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") ); \ |
| | 332 | \ |
| | 333 | memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove], \ |
| | 334 | (m_nCount - nIndex - nRemove)*sizeof(T)); \ |
| | 335 | m_nCount -= nRemove; \ |
| | 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); \ |
| | 353 | } |
| | 354 | |
| | 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) |
| | 360 | |
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