#include <string.h>

size_t strlen(char const *str)
{
	size_t i;

	if (str == NULL)
		return (0);
	i = -1;
	while (str[++i] != '\0');
	return (i);
}

size_t strnlen(char const *str, size_t maxlen)
{
	size_t i;

	if (str == NULL)
		return (0);
	i = -1;
	while (str[++i] != '\0' && (size_t)i < maxlen);
	return (i);
}