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// Copyright 2009-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
#include "platform.h"
#include "alloc.h"
namespace embree
{
/*! static array with static size */
template<typename T, size_t N>
class array_t
{
public:
/********************** Iterators ****************************/
__forceinline T* begin() const { return items; };
__forceinline T* end () const { return items+N; };
/********************** Capacity ****************************/
__forceinline bool empty () const { return N == 0; }
__forceinline size_t size () const { return N; }
__forceinline size_t max_size () const { return N; }
/******************** Element access **************************/
__forceinline T& operator[](size_t i) { assert(i < N); return items[i]; }
__forceinline const T& operator[](size_t i) const { assert(i < N); return items[i]; }
__forceinline T& at(size_t i) { assert(i < N); return items[i]; }
__forceinline const T& at(size_t i) const { assert(i < N); return items[i]; }
__forceinline T& front() const { assert(N > 0); return items[0]; };
__forceinline T& back () const { assert(N > 0); return items[N-1]; };
__forceinline T* data() { return items; };
__forceinline const T* data() const { return items; };
private:
T items[N];
};
/*! static array with dynamic size */
template<typename T, size_t N>
class darray_t
{
public:
__forceinline darray_t () : M(0) {}
__forceinline darray_t (const T& v) : M(0) {
for (size_t i=0; i<N; i++) items[i] = v;
}
/********************** Iterators ****************************/
__forceinline T* begin() const { return (T*)items; };
__forceinline T* end () const { return (T*)items+M; };
/********************** Capacity ****************************/
__forceinline bool empty () const { return M == 0; }
__forceinline size_t size () const { return M; }
__forceinline size_t capacity () const { return N; }
__forceinline size_t max_size () const { return N; }
void resize(size_t new_size) {
assert(new_size < max_size());
M = new_size;
}
/******************** Modifiers **************************/
__forceinline void push_back(const T& v)
{
assert(M+1 < max_size());
items[M++] = v;
}
__forceinline void pop_back()
{
assert(!empty());
M--;
}
__forceinline void clear() {
M = 0;
}
/******************** Element access **************************/
__forceinline T& operator[](size_t i) { assert(i < M); return items[i]; }
__forceinline const T& operator[](size_t i) const { assert(i < M); return items[i]; }
__forceinline T& at(size_t i) { assert(i < M); return items[i]; }
__forceinline const T& at(size_t i) const { assert(i < M); return items[i]; }
__forceinline T& front() { assert(M > 0); return items[0]; };
__forceinline T& back () { assert(M > 0); return items[M-1]; };
__forceinline T* data() { return items; };
__forceinline const T* data() const { return items; };
private:
size_t M;
T items[N];
};
/*! dynamic sized array that is allocated on the stack */
#define dynamic_large_stack_array(Ty,Name,N,max_stack_bytes) StackArray<Ty,max_stack_bytes> Name(N)
template<typename Ty, size_t max_stack_bytes>
struct __aligned(64) StackArray
{
__forceinline StackArray (const size_t N)
: N(N)
{
if (N*sizeof(Ty) <= max_stack_bytes)
data = &arr[0];
else
data = (Ty*) alignedMalloc(N*sizeof(Ty),64);
}
__forceinline ~StackArray () {
if (data != &arr[0]) alignedFree(data);
}
__forceinline operator Ty* () { return data; }
__forceinline operator const Ty* () const { return data; }
__forceinline Ty& operator[](const int i) { assert(i>=0 && i<N); return data[i]; }
__forceinline const Ty& operator[](const int i) const { assert(i>=0 && i<N); return data[i]; }
__forceinline Ty& operator[](const unsigned i) { assert(i<N); return data[i]; }
__forceinline const Ty& operator[](const unsigned i) const { assert(i<N); return data[i]; }
#if defined(__64BIT__) || defined(__EMSCRIPTEN__)
__forceinline Ty& operator[](const size_t i) { assert(i<N); return data[i]; }
__forceinline const Ty& operator[](const size_t i) const { assert(i<N); return data[i]; }
#endif
private:
Ty arr[max_stack_bytes/sizeof(Ty)];
Ty* data;
size_t N;
private:
StackArray (const StackArray& other) DELETED; // do not implement
StackArray& operator= (const StackArray& other) DELETED; // do not implement
};
/*! dynamic sized array that is allocated on the stack */
template<typename Ty, size_t max_stack_elements, size_t max_total_elements>
struct __aligned(64) DynamicStackArray
{
__forceinline DynamicStackArray ()
: data(&arr[0]) {}
__forceinline ~DynamicStackArray ()
{
if (!isStackAllocated())
delete[] data;
}
__forceinline bool isStackAllocated() const {
return data == &arr[0];
}
__forceinline size_t size() const
{
if (isStackAllocated()) return max_stack_elements;
else return max_total_elements;
}
__forceinline void resize(size_t M)
{
assert(M <= max_total_elements);
if (likely(M <= max_stack_elements)) return;
if (likely(!isStackAllocated())) return;
data = new Ty[max_total_elements];
for (size_t i=0; i<max_stack_elements; i++)
data[i] = arr[i];
}
__forceinline operator Ty* () { return data; }
__forceinline operator const Ty* () const { return data; }
__forceinline Ty& operator[](const int i) { assert(i>=0 && i<max_total_elements); resize(i+1); return data[i]; }
__forceinline Ty& operator[](const unsigned i) { assert(i<max_total_elements); resize(i+1); return data[i]; }
#if defined(__64BIT__) || defined(__EMSCRIPTEN__)
__forceinline Ty& operator[](const size_t i) { assert(i<max_total_elements); resize(i+1); return data[i]; }
#endif
__forceinline DynamicStackArray (const DynamicStackArray& other)
: data(&arr[0])
{
for (size_t i=0; i<other.size(); i++)
this->operator[] (i) = other[i];
}
DynamicStackArray& operator= (const DynamicStackArray& other)
{
for (size_t i=0; i<other.size(); i++)
this->operator[] (i) = other[i];
return *this;
}
private:
Ty arr[max_stack_elements];
Ty* data;
};
}
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