# Interface

---

General definitions used throughout the code

## Object Definitions

```c
typedef union {
    bool b;
    uint8_t u8;
    uint16_t u16;
    uint32_t u32;
    uint64_t u64;
    int8_t i8;
    int16_t i16;
    int32_t i32;
    int64_t i64;
    float f32;
    double f64;
    void *ptr;
} kpl_any;

typedef size_t kpl_any_hash_fn(const kpl_any a);

typedef ssize_t kpl_any_cmp_fn(const kpl_any a, const kpl_any b);

typedef int32_t kpl_write(const kpl_ant a, FILE *file, int32_t idnt, uint32_t opts);

typedef void kpl_any_free_fn(kpl_any a);

typedef struct {
    // TODO
} kpl_interface;

typedef struct {
    kpl_any *any;
    kpl_interface *interflace;
} kpl_class;

typedef struct {
    any value, info;
} kpl_result;

typdef struct {
    uint16_t slab_index, array_index;
} kpl_ptr;

#define KPL_PTR_NULL (kpl_ptr) { .slab_index = UINT16_MAX, .array_index = UINT16_MAX }
```