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#ifndef FOUR_ZED_ZED_DYNAMIC_ARRAY_HPP
#define FOUR_ZED_ZED_DYNAMIC_ARRAY_HPP
#include "memory.hpp"
#include "macros.hpp"
#include <cstdint>
#include <cstring>
#include <cassert>
#define BAKE_DYN_ARRAY(T) template struct DynArray<T>;
struct DynArrayBase {
char *ptr = nullptr;
int64_t elementSize = 0;
int64_t elementCount = 0;
int64_t reservedCount = 0;
};
template <typename T>
struct DynArray: DynArrayBase {
DynArray();
~DynArray();
T operator[](std::size_t index);
T *GetPtr();
void Push(const T &val);
T Pop();
void Reserve(int64_t count);
void Resize(int64_t count);
protected:
using DynArrayBase::ptr;
using DynArrayBase::elementSize;
using DynArrayBase::elementCount;
using DynArrayBase::reservedCount;
};
void inline DynArrayReserve(DynArrayBase *arr, int64_t count);
void inline DynArrayDestroy(DynArrayBase *arr);
template <typename T> inline DynArray<T>::DynArray() {
this->elementSize = sizeof(T);
}
template <typename T> inline DynArray<T>::~DynArray() {
DynArrayDestroy(this);
}
template <typename T> inline T DynArray<T>::operator[](std::size_t index) {
assert(index < this->elementCount && "Invalid DynArray<T>[] index - out of bounds");
assert(index < this->reservedCount && "Invalid DynArray<T>[] index - out of reserved bounds");
return *reinterpret_cast<T *>((this->ptr + (sizeof(T) * index)));
}
template <typename T> inline T *DynArray<T>::GetPtr() {
return reinterpret_cast<T *>(reinterpret_cast<void *>(this->ptr));
}
template <typename T> inline void DynArray<T>::Push(const T &val) {
if (this->elementCount + 1 > this->reservedCount) {
DynArrayReserve(this, int64_t(this->reservedCount * 1.5));
}
std::memcpy(this->ptr + (sizeof(T) * this->elementCount), &val, sizeof(T));
this->elementCount += 1;
}
template <typename T> inline T DynArray<T>::Pop() {
assert(this->elementCount == 0 && "Invalid DynArray<T>::Pop() - Contains no elements");
this->elementCount -= 1;
return *reinterpret_cast<T *>((this->ptr + (sizeof(T) * this->elementCount)));
}
template <typename T> inline void DynArray<T>::Reserve(int64_t count) {
return DynArrayReserve(this, count);
}
template <typename T> inline void DynArray<T>::Resize(int64_t count) {
DynArrayReserve(this, count);
this->elementCount = count;
}
#endif /* FOUR_ZED_ZED_DYNAMIC_ARRAY_HPP */
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