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#pragma once
#include "../base/assert.hpp"
#include "../std/stdint.hpp"
namespace df
{
enum FillDirection
{
Forward,
Backward
};
template <typename T>
class IntrusiveVector
{
public:
IntrusiveVector(void * memoryBuffer, uint32_t byteCount)
: m_memory(reinterpret_cast<T *>(memoryBuffer))
, m_direction(Forward)
{
ASSERT(byteCount % sizeof(T) == 0, ());
m_capacity = byteCount / sizeof(T);
m_size = 0;
}
void SetFillDirection(FillDirection direction)
{
ASSERT(m_size == 0, ());
m_direction = direction;
}
void PushBack(T const & value)
{
ASSERT(m_size < m_capacity, ());
if (m_direction == Forward)
m_memory[m_size++] = value;
else
{
m_memory[m_capacity - m_size - 1] = value;
m_size++;
}
}
private:
T * m_memory;
FillDirection m_direction;
uint32_t m_capacity;
uint32_t m_size;
};
}
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