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696 lines
20 KiB
C++
696 lines
20 KiB
C++
//====== Copyright © 1996-2005, Valve Corporation, All rights reserved. =======//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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// A growable array class that maintains a free list and keeps elements
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// in the same location
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//=============================================================================//
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#ifndef UTLVECTOR_H
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#define UTLVECTOR_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include <string.h>
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#include "tier0/platform.h"
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#include "tier0/dbg.h"
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#include "tier1/utlmemory.h"
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#include "vstdlib/strtools.h"
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#define FOR_EACH_VEC( vecName, iteratorName ) \
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for ( int iteratorName = 0; iteratorName < vecName.Count(); iteratorName++ )
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//-----------------------------------------------------------------------------
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// The CUtlVector class:
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// A growable array class which doubles in size by default.
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// It will always keep all elements consecutive in memory, and may move the
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// elements around in memory (via a PvRealloc) when elements are inserted or
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// removed. Clients should therefore refer to the elements of the vector
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// by index (they should *never* maintain pointers to elements in the vector).
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//-----------------------------------------------------------------------------
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template< class T, class A = CUtlMemory<T> >
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class CUtlVector
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{
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typedef A CAllocator;
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public:
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typedef T ElemType_t;
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// constructor, destructor
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CUtlVector( int growSize = 0, int initSize = 0 );
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CUtlVector( T* pMemory, int allocationCount, int numElements = 0 );
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~CUtlVector();
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// Copy the array.
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CUtlVector<T, A>& operator=( const CUtlVector<T, A> &other );
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// element access
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T& operator[]( int i );
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const T& operator[]( int i ) const;
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T& Element( int i );
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const T& Element( int i ) const;
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// Gets the base address (can change when adding elements!)
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T* Base() { return m_Memory.Base(); }
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const T* Base() const { return m_Memory.Base(); }
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// Returns the number of elements in the vector
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// SIZE IS DEPRECATED!
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int Count() const;
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int Size() const; // don't use me!
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// Is element index valid?
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bool IsValidIndex( int i ) const;
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static int InvalidIndex();
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// Adds an element, uses default constructor
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int AddToHead();
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int AddToTail();
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int InsertBefore( int elem );
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int InsertAfter( int elem );
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// Adds an element, uses copy constructor
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int AddToHead( const T& src );
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int AddToTail( const T& src );
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int InsertBefore( int elem, const T& src );
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int InsertAfter( int elem, const T& src );
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// Adds multiple elements, uses default constructor
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int AddMultipleToHead( int num );
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int AddMultipleToTail( int num, const T *pToCopy=NULL );
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int InsertMultipleBefore( int elem, int num, const T *pToCopy=NULL ); // If pToCopy is set, then it's an array of length 'num' and
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int InsertMultipleAfter( int elem, int num );
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// Calls RemoveAll() then AddMultipleToTail.
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void SetSize( int size );
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void SetCount( int count );
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// Calls SetSize and copies each element.
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void CopyArray( const T *pArray, int size );
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// Fast swap
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void Swap( CUtlVector< T, A > &vec );
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// Add the specified array to the tail.
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int AddVectorToTail( CUtlVector<T, A> const &src );
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// Finds an element (element needs operator== defined)
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int Find( const T& src ) const;
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bool HasElement( const T& src ) const;
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// Makes sure we have enough memory allocated to store a requested # of elements
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void EnsureCapacity( int num );
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// Makes sure we have at least this many elements
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void EnsureCount( int num );
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// Element removal
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void FastRemove( int elem ); // doesn't preserve order
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void Remove( int elem ); // preserves order, shifts elements
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void FindAndRemove( const T& src ); // removes first occurrence of src, preserves order, shifts elements
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void RemoveMultiple( int elem, int num ); // preserves order, shifts elements
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void RemoveAll(); // doesn't deallocate memory
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// Memory deallocation
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void Purge();
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// Purges the list and calls delete on each element in it.
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void PurgeAndDeleteElements();
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// Compacts the vector to the number of elements actually in use
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void Compact();
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// Set the size by which it grows when it needs to allocate more memory.
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void SetGrowSize( int size ) { m_Memory.SetGrowSize( size ); }
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int NumAllocated() const; // Only use this if you really know what you're doing!
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void Sort( int (__cdecl *pfnCompare)(const T *, const T *) );
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#ifdef DBGFLAG_VALIDATE
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void Validate( CValidator &validator, char *pchName ); // Validate our internal structures
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#endif // DBGFLAG_VALIDATE
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protected:
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// Can't copy this unless we explicitly do it!
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CUtlVector( CUtlVector const& vec ) { Assert(0); }
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// Grows the vector
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void GrowVector( int num = 1 );
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// Shifts elements....
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void ShiftElementsRight( int elem, int num = 1 );
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void ShiftElementsLeft( int elem, int num = 1 );
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CAllocator m_Memory;
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int m_Size;
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#if !defined(_XBOX) || defined(_DEBUG)
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// For easier access to the elements through the debugger
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// it's in release builds so this can be used in libraries correctly
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T *m_pElements;
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inline void ResetDbgInfo()
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{
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m_pElements = Base();
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}
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#else
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void ResetDbgInfo() {}
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#endif
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};
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//-----------------------------------------------------------------------------
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// The CUtlVectorFixed class:
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// A array class with a fixed allocation scheme
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//-----------------------------------------------------------------------------
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template< class T, size_t MAX_SIZE >
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class CUtlVectorFixed : public CUtlVector< T, CUtlMemoryFixed<T, MAX_SIZE > >
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{
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typedef CUtlVector< T, CUtlMemoryFixed<T, MAX_SIZE > > BaseClass;
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public:
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// constructor, destructor
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CUtlVectorFixed( int growSize = 0, int initSize = 0 ) : BaseClass( growSize, initSize ) {}
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CUtlVectorFixed( T* pMemory, int numElements ) : BaseClass( pMemory, numElements ) {}
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};
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//-----------------------------------------------------------------------------
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// The CCopyableUtlVector class:
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// A array class that allows copy construction (so you can nest a CUtlVector inside of another one of our containers)
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// WARNING - this class lets you copy construct which can be an expensive operation if you don't carefully control when it happens
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// Only use this when nesting a CUtlVector() inside of another one of our container classes (i.e a CUtlMap)
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//-----------------------------------------------------------------------------
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template< class T, class A = CUtlMemory<T> >
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class CCopyableUtlVector : public CUtlVector< T, A >
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{
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typedef CUtlVector< T, A > BaseClass;
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public:
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CCopyableUtlVector( int growSize = 0, int initSize = 0 ) : BaseClass( growSize, initSize ) {}
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CCopyableUtlVector( T* pMemory, int numElements ) : BaseClass( pMemory, numElements ) {}
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virtual ~CCopyableUtlVector() {}
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CCopyableUtlVector( CCopyableUtlVector const& vec ) { CopyArray( vec.Base(), vec.Count() ); }
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};
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//-----------------------------------------------------------------------------
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// constructor, destructor
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline CUtlVector<T, A>::CUtlVector( int growSize, int initSize ) :
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m_Memory(growSize, initSize), m_Size(0)
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{
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ResetDbgInfo();
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}
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template< typename T, class A >
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inline CUtlVector<T, A>::CUtlVector( T* pMemory, int allocationCount, int numElements ) :
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m_Memory(pMemory, allocationCount), m_Size(numElements)
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{
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ResetDbgInfo();
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}
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template< typename T, class A >
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inline CUtlVector<T, A>::~CUtlVector()
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{
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Purge();
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}
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template< typename T, class A >
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inline CUtlVector<T, A>& CUtlVector<T, A>::operator=( const CUtlVector<T, A> &other )
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{
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CopyArray( other.Base(), other.Count() );
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return *this;
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}
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//-----------------------------------------------------------------------------
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// element access
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline T& CUtlVector<T, A>::operator[]( int i )
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{
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Assert( IsValidIndex(i) );
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return Base()[i];
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}
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template< typename T, class A >
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inline const T& CUtlVector<T, A>::operator[]( int i ) const
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{
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Assert( IsValidIndex(i) );
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return Base()[i];
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}
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template< typename T, class A >
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inline T& CUtlVector<T, A>::Element( int i )
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{
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Assert( IsValidIndex(i) );
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return Base()[i];
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}
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template< typename T, class A >
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inline const T& CUtlVector<T, A>::Element( int i ) const
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{
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Assert( IsValidIndex(i) );
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return Base()[i];
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}
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//-----------------------------------------------------------------------------
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// Count
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline int CUtlVector<T, A>::Size() const
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{
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return m_Size;
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::Count() const
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{
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return m_Size;
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}
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//-----------------------------------------------------------------------------
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// Is element index valid?
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline bool CUtlVector<T, A>::IsValidIndex( int i ) const
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{
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return (i >= 0) && (i < m_Size);
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}
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//-----------------------------------------------------------------------------
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// Returns in invalid index
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline int CUtlVector<T, A>::InvalidIndex()
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{
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return -1;
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}
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//-----------------------------------------------------------------------------
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// Grows the vector
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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void CUtlVector<T, A>::GrowVector( int num )
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{
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if (m_Size + num > m_Memory.NumAllocated())
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{
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MEM_ALLOC_CREDIT_CLASS();
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m_Memory.Grow( m_Size + num - m_Memory.NumAllocated() );
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}
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m_Size += num;
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ResetDbgInfo();
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}
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//-----------------------------------------------------------------------------
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// Sorts the vector
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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void CUtlVector<T, A>::Sort( int (__cdecl *pfnCompare)(const T *, const T *) )
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{
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typedef int (__cdecl *QSortCompareFunc_t)(const void *, const void *);
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if ( Count() > 1 )
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qsort( Base(), Count(), sizeof(T), (QSortCompareFunc_t)(pfnCompare) );
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}
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//-----------------------------------------------------------------------------
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// Makes sure we have enough memory allocated to store a requested # of elements
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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void CUtlVector<T, A>::EnsureCapacity( int num )
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{
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MEM_ALLOC_CREDIT_CLASS();
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m_Memory.EnsureCapacity(num);
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ResetDbgInfo();
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}
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//-----------------------------------------------------------------------------
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// Makes sure we have at least this many elements
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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void CUtlVector<T, A>::EnsureCount( int num )
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{
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if (Count() < num)
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AddMultipleToTail( num - Count() );
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}
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//-----------------------------------------------------------------------------
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// Shifts elements
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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void CUtlVector<T, A>::ShiftElementsRight( int elem, int num )
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{
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Assert( IsValidIndex(elem) || ( m_Size == 0 ) || ( num == 0 ));
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int numToMove = m_Size - elem - num;
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if ((numToMove > 0) && (num > 0))
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Q_memmove( &Element(elem+num), &Element(elem), numToMove * sizeof(T) );
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}
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template< typename T, class A >
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void CUtlVector<T, A>::ShiftElementsLeft( int elem, int num )
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{
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Assert( IsValidIndex(elem) || ( m_Size == 0 ) || ( num == 0 ));
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int numToMove = m_Size - elem - num;
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if ((numToMove > 0) && (num > 0))
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{
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Q_memmove( &Element(elem), &Element(elem+num), numToMove * sizeof(T) );
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#ifdef _DEBUG
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Q_memset( &Element(m_Size-num), 0xDD, num * sizeof(T) );
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#endif
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}
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}
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//-----------------------------------------------------------------------------
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// Adds an element, uses default constructor
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline int CUtlVector<T, A>::AddToHead()
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{
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return InsertBefore(0);
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::AddToTail()
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{
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return InsertBefore( m_Size );
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::InsertAfter( int elem )
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{
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return InsertBefore( elem + 1 );
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}
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template< typename T, class A >
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int CUtlVector<T, A>::InsertBefore( int elem )
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{
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// Can insert at the end
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Assert( (elem == Count()) || IsValidIndex(elem) );
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GrowVector();
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ShiftElementsRight(elem);
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Construct( &Element(elem) );
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return elem;
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}
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//-----------------------------------------------------------------------------
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// Adds an element, uses copy constructor
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline int CUtlVector<T, A>::AddToHead( const T& src )
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{
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// Can't insert something that's in the list... reallocation may hose us
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Assert( (&src < Base()) || (&src >= (Base() + Count()) ) );
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return InsertBefore( 0, src );
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::AddToTail( const T& src )
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{
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// Can't insert something that's in the list... reallocation may hose us
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Assert( (&src < Base()) || (&src >= (Base() + Count()) ) );
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return InsertBefore( m_Size, src );
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::InsertAfter( int elem, const T& src )
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{
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// Can't insert something that's in the list... reallocation may hose us
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Assert( (&src < Base()) || (&src >= (Base() + Count()) ) );
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return InsertBefore( elem + 1, src );
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}
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template< typename T, class A >
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int CUtlVector<T, A>::InsertBefore( int elem, const T& src )
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{
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// Can't insert something that's in the list... reallocation may hose us
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Assert( (&src < Base()) || (&src >= (Base() + Count()) ) );
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// Can insert at the end
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Assert( (elem == Count()) || IsValidIndex(elem) );
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GrowVector();
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ShiftElementsRight(elem);
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CopyConstruct( &Element(elem), src );
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return elem;
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}
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//-----------------------------------------------------------------------------
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// Adds multiple elements, uses default constructor
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//-----------------------------------------------------------------------------
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template< typename T, class A >
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inline int CUtlVector<T, A>::AddMultipleToHead( int num )
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{
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return InsertMultipleBefore( 0, num );
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::AddMultipleToTail( int num, const T *pToCopy )
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{
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// Can't insert something that's in the list... reallocation may hose us
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Assert( !pToCopy || (pToCopy + num < Base()) || (pToCopy >= (Base() + Count()) ) );
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return InsertMultipleBefore( m_Size, num, pToCopy );
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}
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template< typename T, class A >
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int CUtlVector<T, A>::InsertMultipleAfter( int elem, int num )
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{
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return InsertMultipleBefore( elem + 1, num );
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}
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template< typename T, class A >
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void CUtlVector<T, A>::SetCount( int count )
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{
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RemoveAll();
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AddMultipleToTail( count );
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}
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template< typename T, class A >
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inline void CUtlVector<T, A>::SetSize( int size )
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{
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SetCount( size );
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}
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template< typename T, class A >
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void CUtlVector<T, A>::CopyArray( const T *pArray, int size )
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{
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// Can't insert something that's in the list... reallocation may hose us
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Assert( !pArray || (Base() >= (pArray + size)) || (pArray >= (Base() + Count()) ) );
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SetSize( size );
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for( int i=0; i < size; i++ )
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{
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(*this)[i] = pArray[i];
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}
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}
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template< typename T, class A >
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void CUtlVector<T, A>::Swap( CUtlVector< T, A > &vec )
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{
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m_Memory.Swap( vec.m_Memory );
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V_swap( m_Size, vec.m_Size );
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V_swap( m_pElements, vec.m_pElements );
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}
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template< typename T, class A >
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int CUtlVector<T, A>::AddVectorToTail( CUtlVector const &src )
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{
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Assert( &src != this );
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int base = Count();
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// Make space.
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AddMultipleToTail( src.Count() );
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// Copy the elements.
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for ( int i=0; i < src.Count(); i++ )
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{
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(*this)[base + i] = src[i];
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}
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return base;
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}
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template< typename T, class A >
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inline int CUtlVector<T, A>::InsertMultipleBefore( int elem, int num, const T *pToInsert )
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{
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if( num == 0 )
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return elem;
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// Can insert at the end
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Assert( (elem == Count()) || IsValidIndex(elem) );
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GrowVector(num);
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ShiftElementsRight(elem, num);
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// Invoke default constructors
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for (int i = 0; i < num; ++i)
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Construct( &Element(elem+i) );
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// Copy stuff in?
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if ( pToInsert )
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{
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for ( int i=0; i < num; i++ )
|
|
{
|
|
Element( elem+i ) = pToInsert[i];
|
|
}
|
|
}
|
|
|
|
return elem;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Finds an element (element needs operator== defined)
|
|
//-----------------------------------------------------------------------------
|
|
template< typename T, class A >
|
|
int CUtlVector<T, A>::Find( const T& src ) const
|
|
{
|
|
for ( int i = 0; i < Count(); ++i )
|
|
{
|
|
if (Element(i) == src)
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
template< typename T, class A >
|
|
bool CUtlVector<T, A>::HasElement( const T& src ) const
|
|
{
|
|
return ( Find(src) >= 0 );
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Element removal
|
|
//-----------------------------------------------------------------------------
|
|
template< typename T, class A >
|
|
void CUtlVector<T, A>::FastRemove( int elem )
|
|
{
|
|
Assert( IsValidIndex(elem) );
|
|
|
|
Destruct( &Element(elem) );
|
|
if (m_Size > 0)
|
|
{
|
|
memcpy( &Element(elem), &Element(m_Size-1), sizeof(T) );
|
|
--m_Size;
|
|
}
|
|
}
|
|
|
|
template< typename T, class A >
|
|
void CUtlVector<T, A>::Remove( int elem )
|
|
{
|
|
Destruct( &Element(elem) );
|
|
ShiftElementsLeft(elem);
|
|
--m_Size;
|
|
}
|
|
|
|
template< typename T, class A >
|
|
void CUtlVector<T, A>::FindAndRemove( const T& src )
|
|
{
|
|
int elem = Find( src );
|
|
if ( elem != -1 )
|
|
{
|
|
Remove( elem );
|
|
}
|
|
}
|
|
|
|
template< typename T, class A >
|
|
void CUtlVector<T, A>::RemoveMultiple( int elem, int num )
|
|
{
|
|
Assert( elem >= 0 );
|
|
Assert( elem + num <= Count() );
|
|
|
|
for (int i = elem + num; --i >= elem; )
|
|
Destruct(&Element(i));
|
|
|
|
ShiftElementsLeft(elem, num);
|
|
m_Size -= num;
|
|
}
|
|
|
|
template< typename T, class A >
|
|
void CUtlVector<T, A>::RemoveAll()
|
|
{
|
|
for (int i = m_Size; --i >= 0; )
|
|
{
|
|
Destruct(&Element(i));
|
|
}
|
|
|
|
m_Size = 0;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Memory deallocation
|
|
//-----------------------------------------------------------------------------
|
|
|
|
template< typename T, class A >
|
|
inline void CUtlVector<T, A>::Purge()
|
|
{
|
|
RemoveAll();
|
|
m_Memory.Purge();
|
|
ResetDbgInfo();
|
|
}
|
|
|
|
|
|
template< typename T, class A >
|
|
inline void CUtlVector<T, A>::PurgeAndDeleteElements()
|
|
{
|
|
for( int i=0; i < m_Size; i++ )
|
|
{
|
|
delete Element(i);
|
|
}
|
|
Purge();
|
|
}
|
|
|
|
template< typename T, class A >
|
|
inline void CUtlVector<T, A>::Compact()
|
|
{
|
|
m_Memory.Purge(m_Size);
|
|
}
|
|
|
|
template< typename T, class A >
|
|
inline int CUtlVector<T, A>::NumAllocated() const
|
|
{
|
|
return m_Memory.NumAllocated();
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Data and memory validation
|
|
//-----------------------------------------------------------------------------
|
|
#ifdef DBGFLAG_VALIDATE
|
|
template< typename T, class A >
|
|
void CUtlVector<T, A>::Validate( CValidator &validator, char *pchName )
|
|
{
|
|
validator.Push( typeid(*this).name(), this, pchName );
|
|
|
|
m_Memory.Validate( validator, "m_Memory" );
|
|
|
|
validator.Pop();
|
|
}
|
|
#endif // DBGFLAG_VALIDATE
|
|
|
|
|
|
#endif // CCVECTOR_H
|