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#ifndef DAT_H
#define DAT_H

#include "types.h"

typedef struct DatElem_ {
   struct DatElem_ *p_next;
   void *p_val;
   TYPE type;
} DatElem;

typedef struct {
   DatElem *p_first;
   DatElem *p_last;
   unsigned i_size;
} Dat;

typedef struct {
   unsigned i_left;
   Dat *p_dat;
   DatElem *p_current;
   DatElem *p_next;
} DatIter;

Dat *dat_new();
DatElem *datelem_new();
DatElem *datelem_new_t(TYPE type);
_Bool dat_empty(Dat *p_dat);
void dat_push(Dat *p_dat, void *p_val);
void dat_push_t(Dat *p_dat, void *p_val, TYPE type);
void *dat_pop(Dat *p_dat);
void *dat_pop_t(Dat *p_dat, TYPE *p_type);
void dat_clear(Dat *p_dat);
void dat_delete(Dat *p_dat);
unsigned dat_size(Dat *p_dat);
void dat_iterate(Dat *p_dat, void (*func)(void *));
void dat_iterate_t(Dat *p_dat, void (*func)(void *, TYPE));
void dat_iterate_tl(Dat *p_dat, void (*func)(void *, TYPE, _Bool));
void *dat_first(Dat *p_dat);
void *dat_second(Dat *p_dat);
void *dat_last(Dat *p_dat);
void *dat_first_t(Dat *p_dat, TYPE *p_type);
void *dat_second_t(Dat *p_dat, TYPE *p_type);
void *dat_last_t(Dat *p_dat, TYPE *p_type);

DatIter *datiter_new(Dat *p_dat);
void datiter_delete(DatIter *p_iter);
void datiter_skip(DatIter *p_iter, unsigned i_num);
void *datiter_next(DatIter *p_iter);
void *datiter_next_t(DatIter *p_iter, TYPE *p_type);
unsigned datiter_left(DatIter *p_iter);
Dat *datiter_dat(DatIter *p_iter);

#endif