Exemplos de calc_rank_and em C++ (Cpp)

Exemplo n.º 1

Arquivo: rank.c Projeto: berkeley-cs186/course-fa07

static float
calc_rank(float *w, tsvector * t, QUERYTYPE * q, int4 method)
{
	ITEM	   *item = GETQUERY(q);
	float		res = 0.0;
	int			len;

	if (!t->size || !q->size)
		return 0.0;

	res = (item->type != VAL && item->val == (int4) '&') ?
		calc_rank_and(w, t, q) : calc_rank_or(w, t, q);

	if (res < 0)
		res = 1e-20;

	if ((method & RANK_NORM_LOGLENGTH) && t->size > 0)
		res /= log((double) (cnt_length(t) + 1)) / log(2.0);

	if (method & RANK_NORM_LENGTH)
	{
		len = cnt_length(t);
		if (len > 0)
			res /= (float) len;
	}

	if ((method & RANK_NORM_UNIQ) && t->size > 0)
		res /= (float) (t->size);

	if ((method & RANK_NORM_LOGUNIQ) && t->size > 0)
		res /= log((double) (t->size + 1)) / log(2.0);

	return res;
}

Exemplo n.º 2

Arquivo: tsrank.c Projeto: amulsul/postgres

static float
calc_rank(float *w, TSVector t, TSQuery q, int32 method)
{
	QueryItem  *item = GETQUERY(q);
	float		res = 0.0;
	int			len;

	if (!t->size || !q->size)
		return 0.0;

	/* XXX: What about NOT? */
	res = (item->type == QI_OPR && item->qoperator.oper == OP_AND) ?
		calc_rank_and(w, t, q) : calc_rank_or(w, t, q);

	if (res < 0)
		res = 1e-20f;

	if ((method & RANK_NORM_LOGLENGTH) && t->size > 0)
		res /= log((double) (cnt_length(t) + 1)) / log(2.0);

	if (method & RANK_NORM_LENGTH)
	{
		len = cnt_length(t);
		if (len > 0)
			res /= (float) len;
	}

	/* RANK_NORM_EXTDIST not applicable */

	if ((method & RANK_NORM_UNIQ) && t->size > 0)
		res /= (float) (t->size);

	if ((method & RANK_NORM_LOGUNIQ) && t->size > 0)
		res /= log((double) (t->size + 1)) / log(2.0);

	if (method & RANK_NORM_RDIVRPLUS1)
		res /= (res + 1);

	return res;
}