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AkSet.h
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26 
27 //////////////////////////////////////////////////////////////////////
28 //
29 // AkSet.h
30 //
31 //////////////////////////////////////////////////////////////////////
32 #ifndef _AKSET_H_
33 #define _AKSET_H_
34 
35 #include <AK/Tools/Common/AkKeyArray.h>
36 
37 // AkSetType
38 // - An optional set type specifier which is passed into some set operations. If it is not included, SetType_Inclusion is assumed.
39 //
40 enum AkSetType
41 {
42  SetType_Inclusion, // <- An AkSet object with type SetType_Inclusion is a set where each element in the array
43  // represents an element in the set. An empty array represents the empty set.
44  SetType_Exclusion // <- An AkSet object with type SetType_Exclusion is an 'inverted' set, where each element in the array
45  // represents and element NOT in the set. An empty array represents the universal set.
46 };
47 
48 template<typename T>
49 struct AkSetGetKey{ static AkForceInline T& Get(T& in_item){ return in_item; } };
50 
51 // AkSet
52 //
53 // Set container type, implemented as a sorted array of unique items
54 //
55 template< typename T, class U_POOL = ArrayPoolDefault, class uGrowBy = AkGrowByPolicy_DEFAULT, class TMovePolicy = AkAssignmentMovePolicy<T>, class TComparePolicy = AkDefaultSortedKeyCompare<T> >
56 class AkSet : public AkSortedKeyArray < T, T, U_POOL, AkSetGetKey<T>, uGrowBy, TMovePolicy, TComparePolicy >
57 {
58 public:
59  bool Contains(T in_item) const { return AkSortedKeyArray < T, T, U_POOL, AkSetGetKey<T>, uGrowBy, TMovePolicy, TComparePolicy >::Exists(in_item) != NULL; }
60 };
61 
62 // AkDisjoint
63 // - Returns true if the intersection of A and B is the empty set.
64 //
65 template< typename T, class U_POOL = ArrayPoolDefault, class uGrowBy, class TMovePolicy, class TComparePolicy >
66 static bool AkDisjoint(const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
67 {
68  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itA = in_A.Begin();
69  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
70  while (itA != in_A.End() && itB != in_B.End())
71  {
72  if (*itA == *itB)
73  return false;
74  else if (*itA < *itB)
75  ++itA;
76  else
77  ++itB;
78  }
79  return true;
80 }
81 
82 // AkIntersect
83 // - Return true if the intersection of A and B is not the empty set.
84 //
85 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
86 static bool AkIntersect(const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
87 {
88  return !AkDisjoint(in_A, in_B);
89 }
90 
91 // AkIsSubset
92 // - Return true if in_A is a subset of in_B
93 //
94 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
95 static bool AkIsSubset(const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
96 {
97  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itA = in_A.Begin();
98  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
99  while (itA != in_A.End() && itB != in_B.End())
100  {
101  if (TComparePolicy::Equal(&in_A, *itA, *itB))
102  {
103  ++itA; ++itB;
104  }
105  else if (TComparePolicy::Lesser(&in_A, *itA, *itB))
106  {
107  return false;//an element of A is not in B
108  }
109  else
110  ++itB;
111  }
112  return (itA == in_A.End());
113 }
114 
115 // AkCountIntersection
116 // - Helper function to count the number of elements that are in both in_A and in_B.
117 //
118 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
119 static AkUInt32 AkCountIntersection(const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
120 {
121  AkUInt32 uSize = 0;
122  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itA = in_A.Begin();
123  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
124  while (itA != in_A.End() && itB != in_B.End())
125  {
126  if (TComparePolicy::Equal(&in_A, *itA, *itB))
127  {
128  ++uSize; ++itA; ++itB;
129  }
130  else if (TComparePolicy::Lesser(&in_A, *itA, *itB))
131  {
132  ++itA;
133  }
134  else
135  {
136  ++itB;
137  }
138  }
139  return uSize;
140 }
141 
142 // AkSubtraction
143 // - In-place set subtraction ( A = A - B )
144 //
145 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy>
146 static bool AkSubtraction(AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
147 {
148  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itAr, itAw;
149  itAr = itAw = in_A.Begin();
150  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
151  while (itAr != in_A.End())
152  {
153  if (itB == in_B.End() || TComparePolicy::Lesser(&in_A, *itAr, *itB))
154  {
155  if (itAw != itAr)
156  *itAw = *itAr;
157 
158  ++itAw;
159  ++itAr;
160  }
161  else if (TComparePolicy::Equal(&in_A, *itAr, *itB))
162  {
163  ++itB;
164  ++itAr;
165  }
166  else
167  {
168  ++itB;
169  }
170  }
171  in_A.Resize((AkUInt32)(itAw.pItem - in_A.Begin().pItem));
172  return true;
173 }
174 
175 // AkIntersection
176 // - In-place set intersection ( A = A n B )
177 //
178 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
179 static bool AkIntersection(AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
180 {
181  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itAr, itAw;
182  itAr = itAw = in_A.Begin();
183  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
184  while (itAr != in_A.End() && itB != in_B.End())
185  {
186  if (TComparePolicy::Equal(&in_A, *itAr, *itB))
187  {
188  if (itAw != itAr)
189  *itAw = *itAr;
190 
191  ++itAw;
192  ++itAr;
193  ++itB;
194  }
195  else if (TComparePolicy::Lesser(&in_A, *itAr,*itB))
196  {
197  ++itAr;
198  }
199  else
200  {
201  ++itB;
202  }
203  }
204  in_A.Resize((AkUInt32)(itAw.pItem - in_A.Begin().pItem));
205  return true;
206 }
207 
208 // AkIntersection
209 // - Out-of-place set intersection ( res = A n B )
210 //
211 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
212 static bool AkIntersection(AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& out_res, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
213 {
214  out_res.RemoveAll();
215 
216  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itA = in_A.Begin();
217  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
218  while (itA != in_A.End() && itB != in_B.End())
219  {
220  if (TComparePolicy::Equal(&in_A, *itA, *itB))
221  {
222  out_res.AddLast(*itA);
223 
224  ++itA;
225  ++itB;
226  }
227  else if (TComparePolicy::Lesser(&in_A, *itA,*itB))
228  {
229  ++itA;
230  }
231  else
232  {
233  ++itB;
234  }
235  }
236  return true;
237 }
238 
239 // AkUnion
240 // - Set union ( A = A U B ).
241 // NOTE: Preforms a memory allocation and may fail.
242 //
243 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
244 static bool AkUnion(AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& io_A, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B)
245 {
246  AkInt32 uSizeNeeded = io_A.Length() + in_B.Length() - AkCountIntersection(io_A, in_B);
247  AkSet<T, U_POOL, uGrowBy> result;
248 
249  if (result.Resize(uSizeNeeded))
250  {
251  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itRes = result.Begin();
252  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itA = io_A.Begin();
253  typename AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>::Iterator itB = in_B.Begin();
254 
255  while (itB != in_B.End() || itA != io_A.End())
256  {
257  if ( itB != in_B.End() && (itA == io_A.End() || TComparePolicy::Lesser(&io_A, *itB, *itA)))
258  {
259  *itRes = *itB;
260  ++itB;
261  }
262  else if (itB == in_B.End() || TComparePolicy::Lesser(&io_A, *itA,*itB) )
263  {
264  *itRes = *itA;
265  ++itA;
266  }
267  else //if ( *itA == *itC)
268  {
269  *itRes = *itA;
270  ++itA;
271  ++itB;
272  }
273 
274  ++itRes;
275  }
276 
277  io_A.Transfer(result);
278  return true;
279  }
280 
281  return false;
282 }
283 
284 typedef AkSet< AkUniqueID, ArrayPoolDefault > AkUniqueIDSet;
285 
286 // AkIntersect
287 // - Return true if the intersection of in_A (a set of type in_typeA), and in_B (a set of type in_typeB) is not the empty set.
288 //
289 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
290 static inline bool AkIntersect(const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, AkSetType in_typeA, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B, AkSetType in_typeB)
291 {
292  if (in_typeA == SetType_Inclusion)
293  {
294  if (in_typeB == SetType_Inclusion)
295  return !AkDisjoint(in_A, in_B);
296  else//(in_typeB == SetType_Exclusion)
297  return !AkIsSubset(in_A, in_B);
298  }
299  else//(in_typeA == SetType_Exclusion)
300  {
301  if (in_typeB == SetType_Inclusion)
302  return !AkIsSubset(in_B, in_A);
303  else//(in_typeB == SetType_Exclusion)
304  return true;//Assuming an infinite space of possible elements.
305  }
306 }
307 
308 // AkContains
309 // - Return true if the element in_item is contained in in_Set, a set of type in_type.
310 //
311 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
312 static inline bool AkContains(const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_Set, AkSetType in_type, T in_item)
313 {
314  return (in_type == SetType_Inclusion && in_Set.Contains(in_item)) ||
315  (in_type == SetType_Exclusion && !in_Set.Contains(in_item));
316 }
317 
318 // AkSubtraction
319 // - pseudo in-place set subtraction (A = A - B) with set type specifiers.
320 // NOTE: Memory may be allocated (in AkUnion) so prepare for failure.
321 //
322 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
323 static inline bool AkSubtraction(AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_A, AkSetType in_typeA, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B, AkSetType in_typeB)
324 {
325  if (in_typeA == SetType_Inclusion)
326  {
327  if (in_typeB == SetType_Inclusion)
328  return AkSubtraction(in_A, in_B);
329  else//(in_typeB == SetType_Exclusion)
330  return AkIntersection(in_A, in_B);
331  }
332  else//(in_typeA == SetType_Exclusion)
333  {
334  if (in_typeB == SetType_Inclusion)
335  return AkUnion(in_A, in_B);
336  else//(in_typeB == SetType_Exclusion)
337  return AkIntersection(in_A, in_B);
338  }
339 }
340 
341 // AkUnion
342 // - Pseudo in-place set union (A = A + B)
343 // NOTE: Memory may be allocated (in AkUnion) so prepare for failure.
344 //
345 template< typename T, class U_POOL, class uGrowBy, class TMovePolicy, class TComparePolicy >
346 static inline bool AkUnion(AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& io_A, AkSetType& io_typeA, const AkSet<T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy>& in_B, AkSetType in_typeB)
347 {
348  if (io_typeA == SetType_Inclusion)
349  {
350  if (in_typeB == SetType_Inclusion)
351  return AkUnion(io_A, in_B);
352  else//(in_typeB == SetType_Exclusion)
353  {
354  AkSet<T, U_POOL, uGrowBy> temp;
355  temp.Transfer(io_A);
356  if (io_A.Copy(in_B) == AK_Success)
357  {
358  io_typeA = SetType_Exclusion;
359  AkSubtraction(io_A, temp);
360  temp.Term();
361  return true;
362  }
363  else
364  {
365  io_A.Transfer(temp);
366  return false;
367  }
368  }
369  }
370  else//(in_typeA == SetType_Exclusion)
371  {
372  if (in_typeB == SetType_Inclusion)
373  return AkSubtraction(io_A, in_B);
374  else//(in_typeB == SetType_Exclusion)
375  return AkIntersection(io_A, in_B);
376  }
377 }
378 
379 #endif
380 
AkContains
static bool AkContains(const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_Set, AkSetType in_type, T in_item)
Definition: AkSet.h:312
AkSet
Definition: AkSet.h:57
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::Copy
AKRESULT Copy(const AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > > &in_rSource)
Definition: AkArray.h:866
AkIntersection
static bool AkIntersection(AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:179
AkCountIntersection
static AkUInt32 AkCountIntersection(const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:119
AkUnion
static bool AkUnion(AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &io_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:244
NULL
#define NULL
Definition: AkTypes.h:46
AK_Success
@ AK_Success
The operation was successful.
Definition: AkTypes.h:136
AkInt32
int32_t AkInt32
Signed 32-bit integer.
Definition: AkNumeralTypes.h:43
SetType_Exclusion
@ SetType_Exclusion
Definition: AkSet.h:44
AkSetType
AkSetType
Definition: AkSet.h:41
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::Resize
bool Resize(AkUInt32 in_uiSize)
Resize the array to the specified size.
Definition: AkArray.h:823
SetType_Inclusion
@ SetType_Inclusion
Definition: AkSet.h:42
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::End
Iterator End() const
Returns the iterator to the end of the array.
Definition: AkArray.h:353
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::Transfer
void Transfer(AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > > &in_rSource)
Definition: AkArray.h:853
AkSubtraction
static bool AkSubtraction(AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:146
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::Begin
Iterator Begin() const
Returns the iterator to the first item of the array, will be End() if the array is empty.
Definition: AkArray.h:345
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::Length
AkForceInline AkUInt32 Length() const
Returns the numbers of items in the array.
Definition: AkArray.h:567
AkIsSubset
static bool AkIsSubset(const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:95
AkDisjoint
static bool AkDisjoint(const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:66
AkUInt32
uint32_t AkUInt32
Unsigned 32-bit integer.
Definition: AkNumeralTypes.h:38
AkArray< T, const T &, ArrayPoolDefault, AkGrowByPolicy_DEFAULT, AkAssignmentMovePolicy< T > >::Term
void Term()
Term the array. Must be called before destroying the object.
Definition: AkArray.h:555
AkSet::Contains
bool Contains(T in_item) const
Definition: AkSet.h:59
AkForceInline
#define AkForceInline
Definition: AkTypes.h:63
AkUniqueIDSet
AkSet< AkUniqueID, ArrayPoolDefault > AkUniqueIDSet
Definition: AkSet.h:284
AkSetGetKey::Get
static AkForceInline T & Get(T &in_item)
Definition: AkSet.h:49
AkIntersect
static bool AkIntersect(const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_A, const AkSet< T, U_POOL, uGrowBy, TMovePolicy, TComparePolicy > &in_B)
Definition: AkSet.h:86

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