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#ifndef __FN_GENERIC_VIRTUAL_LIST_LIST_REF_H__
#define __FN_GENERIC_VIRTUAL_LIST_LIST_REF_H__
#include "BLI_virtual_list_list_ref.h"
#include "FN_generic_virtual_list_ref.h"
namespace FN {
using BLI::VirtualListListRef;
class GenericVirtualListListRef {
private:
enum Category {
SingleArray,
FullArrayList,
};
const CPPType *m_type;
uint m_virtual_list_size;
Category m_category;
union {
struct {
const void *data;
uint real_array_size;
} single_array;
struct {
const void *const *starts;
const uint *real_array_sizes;
} full_array_list;
} m_data;
GenericVirtualListListRef() = default;
public:
static GenericVirtualListListRef FromSingleArray(const CPPType &type,
const void *buffer,
uint real_array_size,
uint virtual_list_size)
{
GenericVirtualListListRef list;
list.m_type = &type;
list.m_virtual_list_size = virtual_list_size;
list.m_category = Category::SingleArray;
list.m_data.single_array.data = buffer;
list.m_data.single_array.real_array_size = real_array_size;
return list;
}
static GenericVirtualListListRef FromFullArrayList(const CPPType &type,
const void *const *starts,
const uint *real_array_sizes,
uint list_size)
{
GenericVirtualListListRef list;
list.m_type = &type;
list.m_virtual_list_size = list_size;
list.m_category = Category::FullArrayList;
list.m_data.full_array_list.starts = starts;
list.m_data.full_array_list.real_array_sizes = real_array_sizes;
return list;
}
static GenericVirtualListListRef FromFullArrayList(const CPPType &type,
ArrayRef<const void *> starts,
ArrayRef<uint> array_sizes)
{
BLI::assert_same_size(starts, array_sizes);
return GenericVirtualListListRef::FromFullArrayList(
type, starts.begin(), array_sizes.begin(), starts.size());
}
uint size() const
{
return m_virtual_list_size;
}
uint sublist_size(uint index) const
{
BLI_assert(index < m_virtual_list_size);
switch (m_category) {
case Category::SingleArray:
return m_data.single_array.real_array_size;
case Category::FullArrayList:
return m_data.full_array_list.real_array_sizes[index];
}
BLI_assert(false);
return 0;
}
const CPPType &type() const
{
return *m_type;
}
bool is_single_list() const
{
switch (m_category) {
case Category::SingleArray:
return true;
case Category::FullArrayList:
return m_virtual_list_size == 1;
}
BLI_assert(false);
return false;
}
GenericVirtualListRef operator[](uint index) const
{
BLI_assert(index < m_virtual_list_size);
switch (m_category) {
case Category::SingleArray:
return GenericVirtualListRef::FromFullArray(
*m_type, m_data.single_array.data, m_data.single_array.real_array_size);
case Category::FullArrayList:
return GenericVirtualListRef::FromFullArray(
*m_type,
m_data.full_array_list.starts[index],
m_data.full_array_list.real_array_sizes[index]);
}
BLI_assert(false);
return GenericVirtualListRef{*m_type};
}
template<typename T> VirtualListListRef<T> as_typed_ref() const
{
BLI_assert(CPP_TYPE<T>() == *m_type);
switch (m_category) {
case Category::SingleArray:
return VirtualListListRef<T>::FromSingleArray(
ArrayRef<T>((const T *)m_data.single_array.data, m_data.single_array.real_array_size),
m_virtual_list_size);
case Category::FullArrayList:
return VirtualListListRef<T>::FromListOfStartPointers(
ArrayRef<const T *>((const T **)m_data.full_array_list.starts, m_virtual_list_size),
ArrayRef<uint>(m_data.full_array_list.real_array_sizes, m_virtual_list_size));
}
BLI_assert(false);
return {};
}
GenericVirtualListRef repeated_sublist(uint index, uint new_virtual_size) const
{
BLI_assert(index < m_virtual_list_size);
switch (m_category) {
case Category::SingleArray:
return GenericVirtualListRef::FromRepeatedArray(*m_type,
m_data.single_array.data,
m_data.single_array.real_array_size,
new_virtual_size);
case Category::FullArrayList:
return GenericVirtualListRef::FromRepeatedArray(
*m_type,
m_data.full_array_list.starts[index],
m_data.full_array_list.real_array_sizes[index],
new_virtual_size);
}
BLI_assert(false);
return {*m_type};
}
GenericVirtualListListRef extended_single_list(uint new_virtual_size) const
{
BLI_assert(this->is_single_list());
switch (m_category) {
case Category::SingleArray:
return GenericVirtualListListRef::FromSingleArray(*m_type,
m_data.single_array.data,
m_data.single_array.real_array_size,
new_virtual_size);
case Category::FullArrayList:
return GenericVirtualListListRef::FromSingleArray(
*m_type,
m_data.full_array_list.starts[0],
m_data.full_array_list.real_array_sizes[0],
new_virtual_size);
}
BLI_assert(false);
return {};
}
};
} // namespace FN
#endif /* __FN_GENERIC_VIRTUAL_LIST_LIST_REF_H__ */
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