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/*
* Copyright (C) 2025 Johnny Richard <johnny@johnnyrichard.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <obe/arena.h>
#include <obe/array.h>
void*
obe_array_new(obe_arena_t* arena, size_t item_size)
{
obe_array_header_t* h = obe_arena_alloc(
arena,
(item_size * OBE_ARRAY_INITIAL_CAPACITY) + sizeof(obe_array_header_t));
if (h == NULL) {
return NULL;
}
h->arena = arena;
h->length = 0;
h->item_size = item_size;
h->capacity = OBE_ARRAY_INITIAL_CAPACITY;
return ((uint8_t *)h) + sizeof(obe_array_header_t);
}
obe_array_header_t*
obe_array_get_header(void* arr)
{
return (obe_array_header_t*)(((uint8_t *)arr) - sizeof(obe_array_header_t));
}
void*
obe_array_grow(void* arr)
{
obe_array_header_t* h = obe_array_get_header(arr);
size_t old_size = sizeof(obe_array_header_t) + (h->capacity * h->item_size);
h->capacity *= 2;
size_t new_size = sizeof(obe_array_header_t) + (h->capacity * h->item_size);
h = obe_arena_realloc(h->arena, h, old_size, new_size);
return ((uint8_t *)h) + sizeof(obe_array_header_t);
}
size_t
obe_array_length(void* arr)
{
assert(arr);
obe_array_header_t* header = obe_array_get_header(arr);
return header->length;
}
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