qsort(
    void	*base,
    size_t	elm_count,
    size_t	elm_size,
    int (*cmp)(const void *, const void *))
{
    char_u	*buf;
    char_u	*p1;
    char_u	*p2;
    int		i, j;
    int		gap;

    buf = alloc(elm_size);
    if (buf == NULL)
	return;

    for (gap = elm_count / 2; gap > 0; gap /= 2)
	for (i = gap; i < elm_count; ++i)
	    for (j = i - gap; j >= 0; j -= gap)
	    {
		// Compare the elements.
		p1 = (char_u *)base + j * elm_size;
		p2 = (char_u *)base + (j + gap) * elm_size;
		if ((*cmp)((void *)p1, (void *)p2) <= 0)
		    break;
		// Exchange the elements.
		mch_memmove(buf, p1, elm_size);
		mch_memmove(p1, p2, elm_size);
		mch_memmove(p2, buf, elm_size);
	    }

    vim_free(buf);
}
qsort(
    void	*base,
    size_t	elm_count,
    size_t	elm_size,
    int (*cmp)(const void *, const void *))
{
    char_u	*buf;
    char_u	*p1;
    char_u	*p2;
    int		i, j;
    int		gap;

    buf = alloc(elm_size);
    if (buf == NULL)
	return;

    for (gap = elm_count / 2; gap > 0; gap /= 2)
	for (i = gap; i < elm_count; ++i)
	    for (j = i - gap; j >= 0; j -= gap)
	    {
		 
		p1 = (char_u *)base + j * elm_size;
		p2 = (char_u *)base + (j + gap) * elm_size;
		if ((*cmp)((void *)p1, (void *)p2) <= 0)
		    break;
		 
		mch_memmove(buf, p1, elm_size);
		mch_memmove(p1, p2, elm_size);
		mch_memmove(p2, buf, elm_size);
	    }

    vim_free(buf);
}