/* libmisc/heap.c - Heap memory allocator
 *
 * Copyright (C) 2025  Luke T. Shumaker <lukeshu@lukeshu.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

#include <stdint.h> /* for uintptr_t */
#include <string.h> /* for memset(), memcpy(), strlen() */

#include <libmisc/_intercept.h>
#include <libmisc/assert.h>

#include <libmisc/heap.h>

void *_heap_aligned_realloc(void *ptr, size_t align, size_t objcnt, size_t objsize) {
	if (align < sizeof(void*))
		align = sizeof(void*);
	size_t size;
	if (__builtin_mul_overflow(objcnt, objsize, &size))
		assert_notreached("heap multiplication overflow");

	void *base = __lm_heap_aligned_realloc(ptr, align, size);

	assert(base);
	assert((uintptr_t)base % align == 0);
	return base;
}

void heap_free(void *ptr) {
	if (ptr)
		__lm_heap_free(ptr);
}

void heap_take(void *ptr) {
	if (ptr)
		__lm_heap_take(ptr);
}

char *heap_strdup(const char *str) {
	assert(str);
	size_t len = strlen(str)+1;
	char *ret = heap_alloc(len, char);
	memcpy(ret, str, len);
	return ret;
}