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Reorganize sources and files (#414)
* Reorganize sources * Refactor * Remove relative paths * Renames * Fix gitignore * Remove stuff * Try fixing format script * Fix format * Fix format * Fix naming script * Test format * Fix format
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234
LEGO1/omni/include/mxhashtable.h
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234
LEGO1/omni/include/mxhashtable.h
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#ifndef MXHASHTABLE_H
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#define MXHASHTABLE_H
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#include "mxcollection.h"
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#include "mxcore.h"
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#include "mxtypes.h"
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#define HASH_TABLE_INIT_SIZE 128
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template <class T>
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class MxHashTableCursor;
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template <class T>
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class MxHashTableNode {
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public:
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MxHashTableNode<T>(T p_obj, MxU32 p_hash)
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{
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m_obj = p_obj;
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m_hash = p_hash;
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m_prev = NULL;
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m_next = NULL;
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}
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// DECOMP: Should use getter and setter methods here per the style guide.
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// However, LEGO1D (with no functions inlined) does not use them.
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T m_obj;
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MxU32 m_hash;
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MxHashTableNode* m_prev;
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MxHashTableNode* m_next;
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};
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template <class T>
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class MxHashTable : protected MxCollection<T> {
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public:
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enum HashTableOpt {
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HashTableOpt_NoExpand = 0,
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HashTableOpt_ExpandAdd = 1,
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HashTableOpt_ExpandMultiply = 2,
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};
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MxHashTable()
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{
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m_numSlots = HASH_TABLE_INIT_SIZE;
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m_slots = new MxHashTableNode<T>*[HASH_TABLE_INIT_SIZE];
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memset(m_slots, 0, sizeof(MxHashTableNode<T>*) * m_numSlots);
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m_resizeOption = HashTableOpt_NoExpand;
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}
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virtual ~MxHashTable() override;
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void Resize();
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void Add(T);
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void DeleteAll();
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virtual MxU32 Hash(T) { return 0; }
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friend class MxHashTableCursor<T>;
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protected:
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void NodeInsert(MxHashTableNode<T>*);
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MxHashTableNode<T>** m_slots; // 0x10
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MxU32 m_numSlots; // 0x14
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MxU32 m_autoResizeRatio; // 0x18
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HashTableOpt m_resizeOption; // 0x1c
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// FIXME: or FIXME? This qword is used as an integer or double depending
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// on the value of m_resizeOption. Hard to say whether this is how the devs
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// did it, but a simple cast in either direction doesn't match.
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union {
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MxU32 m_increaseAmount; // 0x20
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double m_increaseFactor; // 0x20
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};
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};
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template <class T>
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class MxHashTableCursor : public MxCore {
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public:
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MxHashTableCursor(MxHashTable<T>* p_table)
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{
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m_table = p_table;
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m_match = NULL;
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}
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MxBool Find(T p_obj);
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MxBool Current(T& p_obj);
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void DeleteMatch();
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private:
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MxHashTable<T>* m_table;
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MxHashTableNode<T>* m_match;
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};
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template <class T>
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MxBool MxHashTableCursor<T>::Find(T p_obj)
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{
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MxU32 hash = m_table->Hash(p_obj);
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MxS32 bucket = hash % m_table->m_numSlots;
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MxHashTableNode<T>* t = m_table->m_slots[bucket];
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while (t) {
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if (t->m_hash == hash && !m_table->Compare(t->m_obj, p_obj))
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m_match = t;
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t = t->m_next;
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}
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return m_match != NULL;
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}
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template <class T>
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MxBool MxHashTableCursor<T>::Current(T& p_obj)
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{
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if (m_match) {
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p_obj = m_match->m_obj;
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}
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return m_match != NULL;
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}
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template <class T>
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void MxHashTableCursor<T>::DeleteMatch()
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{
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// Cut the matching node out of the linked list
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// by updating pointer references.
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if (m_match == NULL)
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return;
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if (m_match->m_prev) {
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m_match->m_prev->m_next = m_match->m_next;
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}
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else {
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// No "prev" node, so move "next" to the head of the list.
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MxS32 bucket = m_match->m_hash % m_table->m_numSlots;
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m_table->m_slots[bucket] = m_match->m_next;
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}
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if (m_match->m_next)
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m_match->m_next->m_prev = m_match->m_prev;
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m_table->m_customDestructor(m_match->m_obj);
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delete m_match;
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m_table->m_count--;
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}
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template <class T>
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MxHashTable<T>::~MxHashTable()
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{
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DeleteAll();
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}
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template <class T>
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void MxHashTable<T>::DeleteAll()
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{
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for (MxS32 i = 0; i < m_numSlots; i++) {
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MxHashTableNode<T>* t = m_slots[i];
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while (t) {
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MxHashTableNode<T>* next = t->m_next;
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this->m_customDestructor(t->m_obj);
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delete t;
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t = next;
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}
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}
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this->m_count = 0;
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memset(m_slots, 0, sizeof(MxHashTableNode<T>*) * m_numSlots);
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delete[] m_slots;
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}
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template <class T>
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inline void MxHashTable<T>::Resize()
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{
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// Save a reference to the current table
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// so we can walk nodes and re-insert
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MxU32 oldSize = m_numSlots;
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MxHashTableNode<T>** oldTable = m_slots;
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switch (m_resizeOption) {
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case HashTableOpt_ExpandAdd:
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m_numSlots += m_increaseAmount;
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break;
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case HashTableOpt_ExpandMultiply:
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m_numSlots *= m_increaseFactor;
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break;
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}
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MxHashTableNode<T>** newTable = new MxHashTableNode<T>*[m_numSlots];
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m_slots = newTable;
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memset(m_slots, 0, sizeof(MxHashTableNode<T>*) * m_numSlots);
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this->m_count = 0;
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for (MxS32 i = 0; i != oldSize; i++) {
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MxHashTableNode<T>* t = oldTable[i];
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while (t) {
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MxHashTableNode<T>* next = t->m_next;
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NodeInsert(t);
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t = next;
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}
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}
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delete[] oldTable;
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}
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template <class T>
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inline void MxHashTable<T>::NodeInsert(MxHashTableNode<T>* p_node)
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{
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MxS32 bucket = p_node->m_hash % m_numSlots;
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p_node->m_next = m_slots[bucket];
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if (m_slots[bucket])
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m_slots[bucket]->m_prev = p_node;
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m_slots[bucket] = p_node;
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this->m_count++;
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}
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template <class T>
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inline void MxHashTable<T>::Add(T p_newobj)
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{
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if (m_resizeOption && ((this->m_count + 1) / m_numSlots) > m_autoResizeRatio)
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MxHashTable<T>::Resize();
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MxU32 hash = Hash(p_newobj);
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MxHashTableNode<T>* node = new MxHashTableNode<T>(p_newobj, hash);
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MxHashTable<T>::NodeInsert(node);
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}
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#undef HASH_TABLE_INIT_SIZE
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#endif // MXHASHTABLE_H
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