amxmodx/dlls/fakemeta/sdk/sh_stack.h

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2007-05-03 03:11:49 +04:00
/* ======== SourceMM ========
* Copyright (C) 2004-2005 Metamod:Source Development Team
* No warranties of any kind
*
* License: zlib/libpng
*
* Author(s): Pavol "PM OnoTo" Marko
* ============================
*/
#ifndef __SH_STACK_H__
#define __SH_STACK_H__
#define SH_STACK_DEFAULT_SIZE 4
//namespace SourceHook
//{/
// Vector
template <class T> class CStack
{
T *m_Elements;
size_t m_AllocatedSize;
size_t m_UsedSize;
public:
friend class iterator;
class iterator
{
CStack<T> *m_pParent;
size_t m_Index;
public:
iterator(CStack<T> *pParent, size_t id) : m_pParent(pParent), m_Index(id)
{
}
iterator(CStack<T> *pParent) : m_pParent(pParent), m_Index(0)
{
}
iterator() : m_pParent(NULL), m_Index(0)
{
}
T &operator *()
{
return m_pParent->m_Elements[m_Index];
}
const T &operator *() const
{
return m_pParent->m_Elements[m_Index];
}
T * operator->()
{
return m_pParent->m_Elements + m_Index;
}
const T * operator->() const
{
return m_pParent->m_Elements + m_Index;
}
iterator & operator++() // preincrement
{
++m_Index;
return (*this);
}
iterator operator++(int) // postincrement
{
iterator tmp = *this;
++m_Index;
return tmp;
}
iterator & operator--() // predecrement
{
--m_Index;
return (*this);
}
iterator operator--(int) // postdecrememnt
{
iterator tmp = *this;
--m_Index;
return tmp;
}
bool operator==(const iterator & right) const
{
return (m_pParent == right.m_pParent && m_Index == right.m_Index);
}
bool operator!=(const iterator & right) const
{
return !(*this == right);
}
};
CStack() : m_Elements(new T[SH_STACK_DEFAULT_SIZE]),
m_AllocatedSize(SH_STACK_DEFAULT_SIZE),
m_UsedSize(0)
{
}
CStack(size_t size) : m_Elements(new T[size]),
m_AllocatedSize(size),
m_UsedSize(0)
{
}
CStack(const CStack &other) : m_Elements(NULL),
m_AllocatedSize(0),
m_UsedSize(0)
{
reserve(other.m_AllocatedSize);
m_UsedSize = other.m_UsedSize;
for (size_t i = 0; i < m_UsedSize; ++i)
m_Elements[i] = other.m_Elements[i];
}
~CStack()
{
if (m_Elements)
delete [] m_Elements;
}
void operator=(const CStack &other)
{
if (m_AllocatedSize < other.m_AllocatedSize)
{
if (m_Elements)
delete [] m_Elements;
m_Elements = new T[other.m_AllocatedSize];
m_AllocatedSize = other.m_AllocatedSize;
}
m_UsedSize = other.m_UsedSize;
for (size_t i = 0; i < m_UsedSize; ++i)
m_Elements[i] = other.m_Elements[i];
}
bool push(const T &val)
{
if (m_UsedSize + 1 == m_AllocatedSize)
{
// zOHNOES! REALLOCATE!
m_AllocatedSize *= 2;
T *newElements = new T[m_AllocatedSize];
if (!newElements)
{
m_AllocatedSize /= 2;
return false;
}
if (m_Elements)
{
for (size_t i = 0; i < m_UsedSize; ++i)
newElements[i] = m_Elements[i];
delete [] m_Elements;
}
m_Elements = newElements;
}
m_Elements[m_UsedSize++] = val;
return true;
}
void pop()
{
--m_UsedSize;
}
T &front()
{
return m_Elements[m_UsedSize - 1];
}
const T &front() const
{
return m_Elements[m_UsedSize - 1];
}
iterator begin()
{
return iterator(this, 0);
}
iterator end()
{
return iterator(this, m_UsedSize);
}
size_t size()
{
return m_UsedSize;
}
size_t capacity()
{
return m_AllocatedSize;
}
bool empty()
{
return m_UsedSize == 0 ? true : false;
}
bool reserve(size_t size)
{
if (size > m_AllocatedSize)
{
T *newElements = new T[size];
if (!newElements)
return false;
if (m_Elements)
{
for (size_t i = 0; i < m_UsedSize; ++i)
newElements[i] = m_Elements[i];
delete [] m_Elements;
}
m_Elements = newElements;
m_AllocatedSize = size;
}
return true;
}
};
//}; //namespace SourceHook
#endif