fxlibc/src/stdlib/strtoul.c

#include "stdlib_p.h"
#include <errno.h>

unsigned long int strtoul(char const * restrict ptr, char ** restrict endptr,
	int base)
{
	unsigned long n = 0;
	int err = __strto_int(ptr, endptr, base, (long *)&n, NULL, true);
	if(err != 0) errno = err;
	return n;
}