You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
1.8 KiB
81 lines
1.8 KiB
#pragma once
|
|
|
|
#include <exception>
|
|
#include <cstdint>
|
|
#include <cmath>
|
|
|
|
namespace hv
|
|
{
|
|
/// A typed span of continuous memory with a bound.
|
|
template<typename T>
|
|
struct span
|
|
{
|
|
inline span(T* ptr, std::size_t len)
|
|
: ptr(ptr),len(len){}
|
|
|
|
inline operator T*() {return ptr;}
|
|
inline operator const T* const() {return ptr;}
|
|
inline T& operator*() {return *ptr;}
|
|
inline const T& operator*() const {return *ptr;}
|
|
|
|
inline T& operator[](std::size_t index)
|
|
{
|
|
#ifdef DEBUG
|
|
if (index>=len) std::terminate(); // "tried to index out of bounds of array";
|
|
#endif
|
|
return ptr[index];
|
|
}
|
|
inline const T& operator[](std::size_t index) const
|
|
{
|
|
#ifdef DEBUG
|
|
if (index>=len) std::terminate(); // "tried to index out of bounds of array";
|
|
#endif
|
|
return ptr[index];
|
|
}
|
|
|
|
inline span<T> slice(std::size_t off, std::size_t len)
|
|
{
|
|
len = std::min(this->len, len);
|
|
if(len+off>=len || len < off) std::terminate(); // "tried to index out of bounds of array";
|
|
return span<T>(ptr+off, len-off);
|
|
}
|
|
inline span<T> slice(std::size_t off)
|
|
{
|
|
if(len+off>=len || len < off) std::terminate(); // "tried to index out of bounds of array";
|
|
|
|
return span<T>(ptr+off, len-off);
|
|
}
|
|
|
|
template<typename U>
|
|
inline span<U> reinterpret()
|
|
{
|
|
return span<U>((U*)ptr, size_bytes() / sizeof(U));
|
|
}
|
|
|
|
inline T* operator ->()
|
|
{
|
|
return ptr;
|
|
}
|
|
inline const T* operator ->() const
|
|
{
|
|
return ptr;
|
|
}
|
|
|
|
inline T* raw() {
|
|
return ptr;
|
|
}
|
|
inline const T* raw() const {
|
|
return ptr;
|
|
}
|
|
inline std::size_t size() const {
|
|
return len;
|
|
}
|
|
inline std::size_t size_bytes() const {
|
|
return len * sizeof(T);
|
|
}
|
|
private:
|
|
T* const ptr;
|
|
std::size_t len;
|
|
};
|
|
}
|