| | 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 license |
| | 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 | // ============================================================================ |
| | 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 | // ---------------------------------------------------------------------------- |
| | 48 | // wxBaseArray - dynamic array of 'T's |
| | 49 | // ---------------------------------------------------------------------------- |
| | 50 | |
| | 51 | #define _WX_DEFINE_BASEARRAY(T, name) \ |
| | 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 | \ |
| | 220 | res = (*fnCompare)((const void *)lItem, (const void *)(m_pItems[i])); \ |
| | 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); \ |
| | 293 | } |
| | 294 | |
| | 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) |
| | 300 | |
projects / wxWidgets.git / blame_incremental