#ifndef ARENA_INCLUDED
#define ARENA_INCLUDED

#include <stddef.h>
#include <stdint.h>

typedef struct {
    unsigned char  *beg;
    unsigned char  *end;
} Arena;

Arena arena_new(size_t nbytes);
void arena_back(Arena *a, void *buf, size_t buf_len );
void *arena_alloc(Arena *a, ptrdiff_t size, ptrdiff_t align, ptrdiff_t count);
void *arena_calloc(Arena *a, ptrdiff_t size, ptrdiff_t align, ptrdiff_t count);

ptrdiff_t arena_cap(Arena *a);
int arena_can(Arena *a, size_t nbytes);
void arena_free(Arena *a);
void arena_reset(Arena *a);
void arena_print(Arena *a);
size_t arena_alignment(Arena *a);

#endif