1 // Created on: 2002-04-15
2 // Created by: Alexander Kartomin (akm)
3 // Copyright (c) 2002-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef NCollection_Array1_HeaderFile
17 #define NCollection_Array1_HeaderFile
19 #include <Standard_DimensionMismatch.hxx>
20 #include <Standard_OutOfMemory.hxx>
21 #include <Standard_OutOfRange.hxx>
23 #include <NCollection_DefineAlloc.hxx>
24 #include <NCollection_StlIterator.hxx>
26 // *********************************************** Template for Array1 class
29 * Purpose: The class Array1 represents unidimensional arrays
30 * of fixed size known at run time.
31 * The range of the index is user defined.
32 * An array1 can be constructed with a "C array".
33 * This functionality is useful to call methods expecting
34 * an Array1. It allows to carry the bounds inside the arrays.
36 * Examples: Item tab[100]; // An example with a C array
37 * Array1OfItem ttab (tab[0],1,100);
39 * Array1OfItem tttab (ttab(10),10,20); // a slice of ttab
41 * If you want to reindex an array from 1 to Length do :
43 * Array1 tab1(tab(tab.Lower()),1,tab.Length());
45 * Warning: Programs client of such a class must be independant
46 * of the range of the first element. Then, a C++ for
47 * loop must be written like this
49 * for (i = A.Lower(); i <= A.Upper(); i++)
51 * Changes: In comparison to TCollection the flag isAllocated was
52 * renamed into myDeletable (alike in the Array2). For naming
53 * compatibility the method IsAllocated remained in class along
56 template <class TheItemType>
57 class NCollection_Array1
60 //! STL-compliant typedef for value type
61 typedef TheItemType value_type;
64 //! Implementation of the Iterator interface.
69 //! Empty constructor - for later Init
77 //! Constructor with initialization
78 Iterator (const NCollection_Array1& theArray, Standard_Boolean theToEnd = Standard_False) :
79 myPtrEnd (const_cast<TheItemType*> (&theArray.Last() + 1))
81 myPtrCur = theToEnd ? myPtrEnd : const_cast<TheItemType*> (&theArray.First());
85 void Init (const NCollection_Array1& theArray)
87 myPtrCur = const_cast<TheItemType*> (&theArray.First());
88 myPtrEnd = const_cast<TheItemType*> (&theArray.Last() + 1);
92 Iterator& operator= (const Iterator& theOther)
94 myPtrCur = theOther.myPtrCur;
95 myPtrEnd = theOther.myPtrEnd;
100 Standard_Boolean More (void) const
101 { return myPtrCur < myPtrEnd; }
103 //! Increment operator
107 //! Decrement operator
112 void Offset (ptrdiff_t theOffset)
113 { myPtrCur += theOffset; }
115 //! Difference operator.
116 ptrdiff_t Differ (const Iterator& theOther) const
117 { return myPtrCur - theOther.myPtrCur; }
119 //! Constant value access
120 const TheItemType& Value (void) const
121 { return *myPtrCur; }
123 //! Variable value access
124 TheItemType& ChangeValue (void) const
125 { return *myPtrCur; }
127 //! Performs comparison of two iterators
128 Standard_Boolean IsEqual (const Iterator& theOther) const
129 { return myPtrCur == theOther.myPtrCur; }
132 TheItemType* myPtrCur; //!< Pointer to the current element in the array
133 TheItemType* myPtrEnd; //!< Pointer to the past-the-end element in the array
134 }; // End of the nested class Iterator
136 //! Shorthand for a regular iterator type.
137 typedef NCollection_StlIterator<std::random_access_iterator_tag, Iterator, TheItemType, false> iterator;
139 //! Shorthand for a constant iterator type.
140 typedef NCollection_StlIterator<std::random_access_iterator_tag, Iterator, TheItemType, true> const_iterator;
142 //! Returns an iterator pointing to the first element in the array.
143 iterator begin() const { return Iterator (*this, false); }
145 //! Returns an iterator referring to the past-the-end element in the array.
146 iterator end() const { return Iterator (*this, true); }
148 //! Returns a const iterator pointing to the first element in the array.
149 const_iterator cbegin() const { return Iterator (*this, false); }
151 //! Returns a const iterator referring to the past-the-end element in the array.
152 const_iterator cend() const { return Iterator (*this, true); }
155 // ---------- PUBLIC METHODS ------------
158 NCollection_Array1(const Standard_Integer theLower,
159 const Standard_Integer theUpper) :
160 myLowerBound (theLower),
161 myUpperBound (theUpper),
162 myDeletable (Standard_True)
164 Standard_RangeError_Raise_if (theUpper < theLower, "NCollection_Array1::Create");
165 TheItemType* pBegin = new TheItemType[Length()];
166 Standard_OutOfMemory_Raise_if (!pBegin, "NCollection_Array1 : Allocation failed");
168 myData = pBegin - theLower;
172 NCollection_Array1 (const NCollection_Array1& theOther) :
173 myLowerBound (theOther.Lower()),
174 myUpperBound (theOther.Upper()),
175 myDeletable (Standard_True)
177 TheItemType* pBegin = new TheItemType[Length()];
178 Standard_OutOfMemory_Raise_if (!pBegin, "NCollection_Array1 : Allocation failed");
179 myData = pBegin - myLowerBound;
184 //! C array-based constructor
185 NCollection_Array1 (const TheItemType& theBegin,
186 const Standard_Integer theLower,
187 const Standard_Integer theUpper) :
188 myLowerBound (theLower),
189 myUpperBound (theUpper),
190 myDeletable (Standard_False)
192 Standard_RangeError_Raise_if (theUpper < theLower, "NCollection_Array1::Create");
193 myData = (TheItemType *) &theBegin - theLower;
196 //! Initialise the items with theValue
197 void Init (const TheItemType& theValue)
199 TheItemType *pCur = &myData[myLowerBound], *pEnd=&myData[myUpperBound];
200 for(; pCur <= pEnd; pCur++)
201 *pCur = (TheItemType&) theValue;
205 Standard_Integer Size (void) const
207 //! Length query (the same)
208 Standard_Integer Length (void) const
209 { return (myUpperBound-myLowerBound+1); }
212 Standard_Integer Lower (void) const
213 { return myLowerBound; }
215 Standard_Integer Upper (void) const
216 { return myUpperBound; }
219 Standard_Boolean IsDeletable (void) const
220 { return myDeletable; }
222 //! IsAllocated flag - for naming compatibility
223 Standard_Boolean IsAllocated (void) const
224 { return myDeletable; }
227 NCollection_Array1& Assign (const NCollection_Array1& theOther)
229 if (&theOther == this)
231 Standard_DimensionMismatch_Raise_if (Length() != theOther.Length(), "NCollection_Array1::operator=");
232 TheItemType * pMyItem = &myData[myLowerBound];
233 TheItemType * const pEndItem = &(theOther.myData)[theOther.myUpperBound];
234 TheItemType * pItem = &(theOther.myData)[theOther.myLowerBound];
235 while (pItem <= pEndItem) * pMyItem ++ = * pItem ++;
239 //! Assignment operator
240 NCollection_Array1& operator= (const NCollection_Array1& theOther)
242 return Assign (theOther);
245 //! @return first element
246 const TheItemType& First() const
248 return myData[myLowerBound];
251 //! @return first element
252 TheItemType& ChangeFirst()
254 return myData[myLowerBound];
257 //! @return last element
258 const TheItemType& Last() const
260 return myData[myUpperBound];
263 //! @return last element
264 TheItemType& ChangeLast()
266 return myData[myUpperBound];
269 //! Constant value access
270 const TheItemType& Value (const Standard_Integer theIndex) const
272 Standard_OutOfRange_Raise_if (theIndex < myLowerBound || theIndex > myUpperBound, "NCollection_Array1::Value");
273 return myData[theIndex];
276 //! operator() - alias to Value
277 const TheItemType& operator() (const Standard_Integer theIndex) const
278 { return Value (theIndex); }
280 //! Variable value access
281 TheItemType& ChangeValue (const Standard_Integer theIndex)
283 Standard_OutOfRange_Raise_if (theIndex < myLowerBound || theIndex > myUpperBound, "NCollection_Array1::ChangeValue");
284 return myData[theIndex];
287 //! operator() - alias to ChangeValue
288 TheItemType& operator() (const Standard_Integer theIndex)
289 { return ChangeValue (theIndex); }
292 void SetValue (const Standard_Integer theIndex,
293 const TheItemType& theItem)
295 Standard_OutOfRange_Raise_if (theIndex < myLowerBound || theIndex > myUpperBound, "NCollection_Array1::SetValue");
296 myData[theIndex] = theItem;
299 //! Destructor - releases the memory
300 ~NCollection_Array1 (void)
301 { if (myDeletable) delete [] &(myData[myLowerBound]); }
304 // ---------- PROTECTED FIELDS -----------
305 Standard_Integer myLowerBound;
306 Standard_Integer myUpperBound;
307 Standard_Boolean myDeletable; //!< Flag showing who allocated the array
308 TheItemType* myData; //!< Pointer to '0'th array item