ensize.c


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/*
 * Copyright (C) 2018 Tomasz Kramkowski <tk@the-tk.com>
 * SPDX-License-Identifier: MIT
 */
#include <assert.h>

#include "ensize.h"
#include "eprintf.h"

// ensize: realloc p if it is smaller than count given current size
void *ensize(void *p, size_t selem, size_t nelem, size_t *cur, size_t init)
{
	assert(cur != NULL);

	if (*cur >= nelem * selem)
		return p;

	if (*cur == 0)
		*cur = init * selem;
	else
		*cur *= 2;

	return erealloc(p, *cur);
}