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Refactor MxHashTable/MxVariableTable (#283)

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* Refactor MxHashTable/MxVariableTable

* Use MxS8 for Compare return type

* Cursor::DeleteMatch check and clang fix
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MS 2023-11-12 19:25:56 -05:00 committed by GitHub
parent 8b2e7a92e1
commit 8861acaf20
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5 changed files with 162 additions and 112 deletions
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25
LEGO1/mxcollection.h Normal file
View file

@ -0,0 +1,25 @@
#ifndef MXCOLLECTION_H
#define MXCOLLECTION_H
#include "mxcore.h"
template <class T>
class MxCollection : public MxCore {
public:
MxCollection()
{
m_count = 0;
m_customDestructor = Destroy;
}
virtual ~MxCollection() {}
static void Destroy(T){};
virtual MxS8 Compare(T, T) { return 0; }
protected:
MxU32 m_count; // +0x8
void (*m_customDestructor)(T); // +0xc
};
#endif // MXCOLLECTION_H

190
LEGO1/mxhashtable.h
View file

@ -1,13 +1,11 @@
#ifndef MXHASHTABLE_H
#define MXHASHTABLE_H
#include "mxcollection.h"
#include "mxcore.h"
#include "mxtypes.h"
#define HASH_TABLE_INIT_SIZE 128
#define HASH_TABLE_OPT_NO_EXPAND 0
#define HASH_TABLE_OPT_EXPAND_ADD 1
#define HASH_TABLE_OPT_EXPAND_MULTIPLY 2
template <class T>
class MxHashTableCursor;
@ -15,8 +13,7 @@ class MxHashTableCursor;
template <class T>
class MxHashTableNode {
public:
MxHashTableNode<T>() {}
MxHashTableNode<T>(T* p_obj, MxU32 p_hash)
MxHashTableNode<T>(T p_obj, MxU32 p_hash)
{
m_obj = p_obj;
m_hash = p_hash;
@ -24,54 +21,39 @@ class MxHashTableNode {
m_next = NULL;
}
// private:
T* m_obj;
// DECOMP: Should use getter and setter methods here per the style guide.
// However, LEGO1D (with no functions inlined) does not use them.
T m_obj;
MxU32 m_hash;
MxHashTableNode* m_prev;
MxHashTableNode* m_next;
};
// See MxOmni::Create
// VTABLE 0x100dc1b0
template <class T>
class HashTableParent : public MxCore {
class MxHashTable : protected MxCollection<T> {
public:
HashTableParent()
{
m_numKeys = 0;
m_customDestructor = Destroy;
}
enum HashTableOpt {
HashTableOpt_NoExpand = 0,
HashTableOpt_ExpandAdd = 1,
HashTableOpt_ExpandMultiply = 2,
};
static void Destroy(T*){};
virtual MxS8 Compare(T*, T*) = 0;
protected:
MxU32 m_numKeys; // +0x8
void (*m_customDestructor)(T*); // +0xc
};
// VTABLE 0x100dc1e8
template <class T>
class MxHashTable : protected HashTableParent<T> {
public:
MxHashTable()
{
m_numSlots = HASH_TABLE_INIT_SIZE;
m_slots = new MxHashTableNode<T>*[HASH_TABLE_INIT_SIZE];
memset(m_slots, 0, sizeof(MxHashTableNode<T>*) * m_numSlots);
m_resizeOption = HASH_TABLE_OPT_NO_EXPAND;
m_resizeOption = HashTableOpt_NoExpand;
}
virtual ~MxHashTable() override;
void Resize();
void Add(T*);
void Add(T);
void DeleteAll();
virtual MxS8 Compare(T*, T*) override = 0;
virtual MxU32 Hash(T*) = 0;
virtual MxU32 Hash(T) { return 0; }
// FIXME: use of friend here?
friend class MxHashTableCursor<T>;
protected:
@ -79,91 +61,108 @@ class MxHashTable : protected HashTableParent<T> {
MxHashTableNode<T>** m_slots; // +0x10
MxU32 m_numSlots; // +0x14
MxU32 m_autoResizeRatio;
int m_resizeOption; // +0x1c
MxU32 m_autoResizeRatio; // +0x18
HashTableOpt m_resizeOption; // +0x1c
// FIXME: or FIXME? This qword is used as an integer or double depending
// on the value of m_resizeOption. Hard to say whether this is how the devs
// did it, but a simple cast in either direction doesn't match.
union {
MxU32 m_increaseAmount;
double m_increaseFactor;
MxU32 m_increaseAmount; // +0x20
double m_increaseFactor; // +0x20
};
};
template <class T>
class MxHashTableCursor : public MxCore {
public:
MxHashTableCursor(MxHashTable<T>* p_hashTable)
MxHashTableCursor(MxHashTable<T>* p_table)
{
m_table = p_hashTable;
m_table = p_table;
m_match = NULL;
}
MxBool Find(T* p_obj)
{
MxU32 hash = m_table->Hash(p_obj);
int bucket = hash % m_table->m_numSlots;
MxHashTableNode<T>* t = m_table->m_slots[bucket];
while (t) {
if (t->m_hash == hash && !m_table->Compare(t->m_obj, p_obj))
m_match = t;
t = t->m_next;
}
return m_match != NULL;
}
void GetMatch(T*& p_obj)
{
if (m_match) {
p_obj = m_match->m_obj;
}
}
void DeleteMatch()
{
// Cut the matching node out of the linked list
// by updating pointer references.
if (m_match->m_prev) {
m_match->m_prev->m_next = m_match->m_next;
}
else {
// No "prev" node, so move "next" to the head of the list.
int bucket = m_match->m_hash % m_table->m_numSlots;
m_table->m_slots[bucket] = m_match->m_next;
}
if (m_match->m_next)
m_match->m_next->m_prev = m_match->m_prev;
m_table->m_customDestructor(m_match->m_obj);
delete m_match;
m_table->m_numKeys--;
}
MxBool Find(T p_obj);
MxBool Current(T& p_obj);
void DeleteMatch();
private:
MxHashTable<T>* m_table;
MxHashTableNode<T>* m_match;
};
template <class T>
MxBool MxHashTableCursor<T>::Find(T p_obj)
{
MxU32 hash = m_table->Hash(p_obj);
MxS32 bucket = hash % m_table->m_numSlots;
MxHashTableNode<T>* t = m_table->m_slots[bucket];
while (t) {
if (t->m_hash == hash && !m_table->Compare(t->m_obj, p_obj))
m_match = t;
t = t->m_next;
}
return m_match != NULL;
}
template <class T>
MxBool MxHashTableCursor<T>::Current(T& p_obj)
{
if (m_match) {
p_obj = m_match->m_obj;
}
return m_match != NULL;
}
template <class T>
void MxHashTableCursor<T>::DeleteMatch()
{
// Cut the matching node out of the linked list
// by updating pointer references.
if (m_match == NULL)
return;
if (m_match->m_prev) {
m_match->m_prev->m_next = m_match->m_next;
}
else {
// No "prev" node, so move "next" to the head of the list.
MxS32 bucket = m_match->m_hash % m_table->m_numSlots;
m_table->m_slots[bucket] = m_match->m_next;
}
if (m_match->m_next)
m_match->m_next->m_prev = m_match->m_prev;
m_table->m_customDestructor(m_match->m_obj);
delete m_match;
m_table->m_count--;
}
template <class T>
MxHashTable<T>::~MxHashTable()
{
for (int i = 0; i < m_numSlots; i++) {
DeleteAll();
}
template <class T>
void MxHashTable<T>::DeleteAll()
{
for (MxS32 i = 0; i < m_numSlots; i++) {
MxHashTableNode<T>* t = m_slots[i];
while (t) {
MxHashTableNode<T>* next = t->m_next;
this->m_customDestructor(t->m_obj);
m_customDestructor(t->m_obj);
delete t;
t = next;
}
}
this->m_numKeys = 0;
m_count = 0;
memset(m_slots, 0, sizeof(MxHashTableNode<T>*) * m_numSlots);
delete[] m_slots;
@ -178,21 +177,20 @@ inline void MxHashTable<T>::Resize()
MxHashTableNode<T>** old_table = m_slots;
switch (m_resizeOption) {
case HASH_TABLE_OPT_EXPAND_ADD:
case HashTableOpt_ExpandAdd:
m_numSlots += m_increaseAmount;
break;
case HASH_TABLE_OPT_EXPAND_MULTIPLY:
case HashTableOpt_ExpandMultiply:
m_numSlots *= m_increaseFactor;
break;
}
MxHashTableNode<T>** new_table = new MxHashTableNode<T>*[m_numSlots];
// FIXME: order? m_numKeys set after `rep stosd`
m_slots = new_table;
memset(m_slots, 0, sizeof(MxHashTableNode<T>*) * m_numSlots);
this->m_numKeys = 0;
m_count = 0;
for (int i = 0; i != old_size; i++) {
for (MxS32 i = 0; i != old_size; i++) {
MxHashTableNode<T>* t = old_table[i];
while (t) {
@ -208,7 +206,7 @@ inline void MxHashTable<T>::Resize()
template <class T>
inline void MxHashTable<T>::_NodeInsert(MxHashTableNode<T>* p_node)
{
int bucket = p_node->m_hash % m_numSlots;
MxS32 bucket = p_node->m_hash % m_numSlots;
p_node->m_next = m_slots[bucket];
@ -216,13 +214,13 @@ inline void MxHashTable<T>::_NodeInsert(MxHashTableNode<T>* p_node)
m_slots[bucket]->m_prev = p_node;
m_slots[bucket] = p_node;
this->m_numKeys++;
m_count++;
}
template <class T>
inline void MxHashTable<T>::Add(T* p_newobj)
inline void MxHashTable<T>::Add(T p_newobj)
{
if (m_resizeOption && ((this->m_numKeys + 1) / m_numSlots) > m_autoResizeRatio)
if (m_resizeOption && ((m_count + 1) / m_numSlots) > m_autoResizeRatio)
MxHashTable<T>::Resize();
MxU32 hash = Hash(p_newobj);
@ -231,4 +229,6 @@ inline void MxHashTable<T>::Add(T* p_newobj)
MxHashTable<T>::_NodeInsert(node);
}
#undef HASH_TABLE_INIT_SIZE
#endif // MXHASHTABLE_H

1
LEGO1/mxstring.h
View file

@ -18,6 +18,7 @@ class MxString : public MxCore {
MxString operator+(const char*);
MxString& operator+=(const char*);
inline MxS8 Compare(const MxString& p_str) const { return strcmp(m_data, p_str.m_data); }
inline const char* GetData() const { return m_data; }
private:

20
LEGO1/mxvariabletable.cpp
View file

@ -3,7 +3,7 @@
// OFFSET: LEGO1 0x100b7330
MxS8 MxVariableTable::Compare(MxVariable* p_var0, MxVariable* p_var1)
{
return strcmp(p_var0->GetKey()->GetData(), p_var1->GetKey()->GetData());
return p_var0->GetKey()->Compare(*p_var1->GetKey());
}
// OFFSET: LEGO1 0x100b7370
@ -22,43 +22,43 @@ MxU32 MxVariableTable::Hash(MxVariable* p_var)
// OFFSET: LEGO1 0x100b73a0
void MxVariableTable::SetVariable(const char* p_key, const char* p_value)
{
MxHashTableCursor<MxVariable> cursor(this);
MxHashTableCursor<MxVariable*> cursor(this);
MxVariable* var = new MxVariable(p_key, p_value);
if (cursor.Find(var)) {
delete var;
cursor.GetMatch(var);
cursor.Current(var);
var->SetValue(p_value);
}
else {
MxHashTable<MxVariable>::Add(var);
MxHashTable<MxVariable*>::Add(var);
}
}
// OFFSET: LEGO1 0x100b7740
void MxVariableTable::SetVariable(MxVariable* var)
void MxVariableTable::SetVariable(MxVariable* p_var)
{
MxHashTableCursor<MxVariable> cursor(this);
MxBool found = cursor.Find(var);
MxHashTableCursor<MxVariable*> cursor(this);
MxBool found = cursor.Find(p_var);
if (found)
cursor.DeleteMatch();
MxHashTable<MxVariable>::Add(var);
MxHashTable<MxVariable*>::Add(p_var);
}
// OFFSET: LEGO1 0x100b78f0
const char* MxVariableTable::GetVariable(const char* p_key)
{
const char* value = "";
MxHashTableCursor<MxVariable> cursor(this);
MxHashTableCursor<MxVariable*> cursor(this);
MxVariable* var = new MxVariable(p_key);
MxBool found = cursor.Find(var);
delete var;
if (found) {
cursor.GetMatch(var);
cursor.Current(var);
value = var->GetValue()->GetData();
}

38
LEGO1/mxvariabletable.h
View file

@ -7,12 +7,12 @@
// VTABLE 0x100dc1c8
// SIZE 0x28
class MxVariableTable : public MxHashTable<MxVariable> {
class MxVariableTable : public MxHashTable<MxVariable*> {
public:
MxVariableTable() { m_customDestructor = Destroy; }
__declspec(dllexport) void SetVariable(const char* key, const char* value);
__declspec(dllexport) void SetVariable(MxVariable* var);
__declspec(dllexport) const char* GetVariable(const char* key);
__declspec(dllexport) void SetVariable(const char* p_key, const char* p_value);
__declspec(dllexport) void SetVariable(MxVariable* p_var);
__declspec(dllexport) const char* GetVariable(const char* p_key);
// OFFSET: LEGO1 0x100afdb0
static void Destroy(MxVariable* p_obj) { p_obj->Destroy(); }
@ -21,13 +21,37 @@ class MxVariableTable : public MxHashTable<MxVariable> {
virtual MxU32 Hash(MxVariable*) override; // +0x18
};
// OFFSET: LEGO1 0x100afcd0 TEMPLATE
// MxCollection<MxVariable *>::Compare
// OFFSET: LEGO1 0x100afce0 TEMPLATE
// MxCollection<MxVariable *>::~MxCollection<MxVariable *>
// OFFSET: LEGO1 0x100afd30 TEMPLATE
// MxCollection<MxVariable *>::Destroy
// OFFSET: LEGO1 0x100afd40 TEMPLATE
// MxCollection<MxVariable *>::`scalar deleting destructor'
// OFFSET: LEGO1 0x100afdc0 TEMPLATE
// MxHashTable<MxVariable *>::Hash
// OFFSET: LEGO1 0x100b0bd0 TEMPLATE
// MxHashTable<MxVariable>::~MxHashTable<MxVariable>
// MxHashTable<MxVariable *>::~MxHashTable<MxVariable *>
// OFFSET: LEGO1 0x100b0ca0 TEMPLATE
// MxHashTable<MxVariable *>::`scalar deleting destructor'
// OFFSET: LEGO1 0x100b7ab0 TEMPLATE
// MxHashTable<MxVariable>::Resize
// MxHashTable<MxVariable *>::Resize
// OFFSET: LEGO1 0x100b7b80 TEMPLATE
// MxHashTable<MxVariable>::_NodeInsert
// MxHashTable<MxVariable *>::_NodeInsert
// VTABLE 0x100dc1b0 TEMPLATE
// class MxCollection<MxVariable *>
// VTABLE 0x100dc1e8 TEMPLATE
// class MxHashTable<MxVariable *>
#endif // MXVARIABLETABLE_H