#ifndef INCLUDED_C_ARENA_H
#define INCLUDED_C_ARENA_H

#ifndef INCLUDED_C_BASE_H
#include <c_Base.h>
#endif /*INCLUDED_C_BASE_H*/

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

typedef struct {
    uint8_t* buf;
    c_size_t buf_len;
    c_size_t prev_offset;
    c_size_t curr_offset;
}c_Arena_t;

typedef struct {
    c_Arena_t* arena;
    c_size_t prev_offset;
    c_size_t curr_offset;
}c_ArenaTemp_t;

void c_Arena_Init(c_Arena_t* a, void* buf, c_size_t buf_len);

void *c_Arena_Alloc(c_Arena_t *a, c_size_t size);

void *c_Arena_Resize(c_Arena_t *a, void *old_memory, c_size_t old_size, c_size_t new_size);

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

C_STATIC_FORCE_INLINE
void c_Arena_Destroy(c_Arena_t* a) {
    a->curr_offset = a->prev_offset = 0;
}

C_STATIC_FORCE_INLINE
void c_Arena_Free(c_Arena_t *a, void *ptr) {
    C_UNUSED(a);
    C_UNUSED(ptr);
}

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

C_STATIC_FORCE_INLINE
c_ArenaTemp_t c_ArenaTemp_Begin(c_Arena_t *a) {
    c_ArenaTemp_t temp;
    temp.arena = a;
    temp.prev_offset = a->prev_offset;
    temp.curr_offset = a->prev_offset;
    return temp;
}

C_STATIC_FORCE_INLINE
void c_ArenaTemp_End(c_ArenaTemp_t *a) {
    a->arena->curr_offset = a->curr_offset;
    a->arena->prev_offset = a->prev_offset;
}

#endif /*INCLUDED_C_ARENA_H*/