#ifndef __SPL_LAYOUT_H__
#define __SPL_LAYOUT_H__

#include "spl_type.h"

typedef struct {
    usize size;
    usize abi_align;
    usize pref_align;
    VEC(usize) invalid_values;
} spl_layout_scalar_t;

typedef struct {
    usize add_space;
    usize ptr_size;
    usize ptr_align;
} spl_layout_ptr_t;

typedef struct {
    bool allow_field_reordering;
    enum { ALIGN_MAX, ALIGN_FIXED, ALIGN_MAX_WITH_MIN } align_rule;
    usize fixed_align;
} spl_layout_agg_t;

typedef struct {
    usize size_bits;
    usize align_bits;
    VEC(usize) field_bit_offsets;
    VEC(usize) field_bit_sizes;
    bool resolved;
} spl_layout_info_t;

typedef struct {
    enum { SPL_BIG_ENDIAN, SPL_LITTLE_ENDIAN } endian; // TODO 更多位存储方式

} spl_layout_target_t;

typedef struct {
    VEC(spl_layout_scalar_t) scalars;
    VEC(spl_layout_ptr_t) pointers;
    spl_layout_agg_t aggregate;
    VEC(spl_layout_info_t) infos;
    spl_layout_target_t *target;
} spl_layout_t;

void spl_layout_init(spl_layout_t *layout, spl_layout_target_t *target);
void spl_layout_drop(spl_layout_t *layout);

void spl_layout_resolve(spl_layout_t *layout, spl_type_t *type);

void spl_layout_add_scalar(spl_layout_t *layout, usize size, usize abi_align);
void spl_layout_add_ptr(spl_layout_t *layout, usize addr_space, usize size, usize align);

const spl_layout_info_t *spl_layout_info_of(spl_layout_t *layout, spl_type_id_t id);

#endif /* __SPL_LAYOUT_H__ */