#ifndef __SCC_HIR_LAYOUT_H__
#define __SCC_HIR_LAYOUT_H__

#include "scc_hir_module.h"
#include <scc_type_abi.h>

#define SCC_ALIGN_UP(x, align) (((x) + (align) - 1) & ~((align) - 1))

/// 结构体/联合体字段布局
typedef struct scc_hir_field_layout {
    int offset;
    int size;
    int align;
} scc_hir_field_layout_t;

/// 聚合体布局结果 (FLEX)
typedef struct scc_hir_aggregate_layout {
    int size;
    int align;
    int field_count;
    scc_hir_field_layout_t fields[];
} scc_hir_aggregate_layout_t;

int scc_hir_type_size(scc_hir_module_t *mod, scc_hir_type_ref_t type,
                      const scc_type_abi_t *abi);

int scc_hir_type_align(scc_hir_module_t *mod, scc_hir_type_ref_t type,
                       const scc_type_abi_t *abi);

int scc_hir_field_offset(scc_hir_module_t *mod, scc_hir_type_ref_t type,
                         int field_idx, const scc_type_abi_t *abi);

scc_hir_aggregate_layout_t *scc_hir_aggregate_layout(scc_hir_module_t *mod,
                                                     scc_hir_type_ref_t type,
                                                     const scc_type_abi_t *abi);

void scc_hir_aggregate_layout_free(scc_hir_aggregate_layout_t *layout);

#endif /* __SCC_HIR_LAYOUT_H__ */