/*
 * Copyright (C) 2025 Johnny Richard <johnny@johnnyrichard.com>
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 *
 * This file is part of obe.
 *
 * obe is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * obe is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with obe. If not, see <https://www.gnu.org/licenses/>.
 */
#ifndef OBE_ARRAY_H
#define OBE_ARRAY_H
#include <obe/arena.h>
#include <stddef.h>

#define OBE_ARRAY_INITIAL_CAPACITY 4

#define obe_array(arena, T) (T*)obe_array_new((arena), sizeof(T))

#define obe_array_append(arr, item)                                            \
    do {                                                                       \
        obe_array_header_t* h = obe_array_get_header(arr);                     \
        if (h->capacity < h->length + 1) {                                     \
            arr = obe_array_grow(arr);                                         \
            h = obe_array_get_header(arr);                                     \
        }                                                                      \
        arr[h->length++] = item;                                               \
    } while (0)

typedef struct obe_array_header
{
    obe_arena_t* arena;
    size_t capacity;
    size_t item_size;
    size_t length;
} obe_array_header_t;

void*
obe_array_new(obe_arena_t* arena, size_t item_size);

obe_array_header_t*
obe_array_get_header(void* arr);

void*
obe_array_grow(void* arr);

size_t
obe_array_length(void* arr);

#endif /* OBE_ARRAY_H */