public void BuildHyperGraph(LAPCFGrammar grammar, HyperEdgePool epool, HyperVertexPool vpool, int[] tagCapacity = null)
{
epool.Recycle ();
vpool.Recycle ();
this.ROOTID = grammar.ROOTID;
var maxSubTag = grammar.subTagCounts.Max ();
lbuf = new double[maxSubTag + 1];
// CYK
for (int i = 0; i < wids.Length; ++i) {
bool isRoot = i == 0 && i == wids.Length - 1;
chart [i, i] = new HyperCell (i, i + 1, grammar.TotalTagCount);
MatchLexicon (grammar, chart [i, i], wids [i], epool, vpool, tagCapacity,
allowedPoSTags == null ? null : allowedPoSTags[i],
rawTagProbs == null ? null : rawTagProbs[i], isRoot);
MatchUnaryRules (grammar, chart [i, i], epool, vpool, tagCapacity, isRoot);
chart [i, i].Finish ();
}
for (int spanL = 2; spanL <= wids.Length; ++spanL) {
for (int beg = 0; beg + spanL <= wids.Length; ++beg) {
int end = beg + spanL;
int l = beg;
int r = end - 1;
bool isRoot = l == 0 && r == wids.Length - 1;
chart [l, r] = new HyperCell (beg, end, grammar.TotalTagCount);
for (int mid = l; mid < r; ++mid) {
MatchBinaryRules (grammar, chart [l, r], chart [l, mid], chart [mid + 1, r], epool, vpool, tagCapacity, isRoot);
}
for (int i = 0; i < chart[l, r].l1v.Length; ++i) {
var c = chart [l, r].l1v [i];
if (c != null) {
if (isRoot && c.tag != ROOTID) {
continue;
}
chart [l, r].l2v [i] = vpool.Allocate (false, c.tag, c.beta.Length, c.beta.v.Length);
epool.Allocate (chart [l, r].l2v [i], c);
}
}
MatchUnaryRules (grammar, chart [l, r], epool, vpool, tagCapacity, isRoot);
chart [l, r].Finish ();
}
}
}
public int ExpandHyperGraph(LAPCFGrammar grammar, int[] tagMap, HyperEdgePool epool, HyperVertexPool vpool, int[] tagCapacity = null)
{
this.ROOTID = grammar.ROOTID;
var maxSubTag = grammar.subTagCounts.Max ();
lbuf = new double[maxSubTag + 1];
int prunedCell = 0;
var lv1flags = new TimedArray<bool> (grammar.TotalTagCount);
var lv2flags = new TimedArray<bool> (grammar.TotalTagCount);
// CYK
for (int i = 0; i < wids.Length; ++i) {
var oldcell = chart [i, i];
lv1flags.Clear ();
foreach (var v in oldcell.l1v) {
if (v != null) {
lv1flags [v.tag] = true;
}
}
lv2flags.Clear ();
foreach (var v in oldcell.l2v) {
if (v != null) {
lv2flags [v.tag] = true;
}
}
bool isRoot = i == 0 && i == wids.Length - 1;
chart [i, i] = new HyperCell (i, i + 1, grammar.TotalTagCount);
ExpandLexicon (
grammar, chart [i, i], lv1flags, lv2flags, tagMap,
wids [i], epool, vpool, tagCapacity,
allowedPoSTags == null ? null: allowedPoSTags[i],
rawTagProbs == null ? null : rawTagProbs[i], isRoot);
ExpandUnaryRules (grammar, chart [i, i], lv1flags, lv2flags, tagMap, epool, vpool, tagCapacity, isRoot);
chart [i, i].Finish ();
}
for (int spanL = 2; spanL <= wids.Length; ++spanL) {
for (int beg = 0; beg + spanL <= wids.Length; ++beg) {
int end = beg + spanL;
int l = beg;
int r = end - 1;
var oldcell = chart [l, r];
lv1flags.Clear ();
foreach (var v in oldcell.l1v) {
if (v != null) {
lv1flags [v.tag] = true;
}
}
lv2flags.Clear ();
foreach (var v in oldcell.l2v) {
if (v != null) {
lv2flags [v.tag] = true;
}
}
bool isRoot = l == 0 && r == wids.Length - 1;
chart [l, r] = new HyperCell (beg, end, grammar.TotalTagCount);
if (!oldcell.IsEmptyCell ()) {
for (int mid = l; mid < r; ++mid) {
ExpandBinaryRules (grammar, chart [l, r], chart [l, mid], chart [mid + 1, r],
lv1flags, lv2flags, tagMap,
epool, vpool, tagCapacity, isRoot);
}
for (int i = 0; i < chart[l, r].l1v.Length; ++i) {
var c = chart [l, r].l1v [i];
if (c != null) {
if (isRoot && c.tag != ROOTID) {
continue;
}
chart [l, r].l2v [i] = vpool.Allocate (false, c.tag, c.beta.Length, c.beta.v.Length);
epool.Allocate (chart [l, r].l2v [i], c);
}
}
ExpandUnaryRules (grammar, chart [l, r],
lv1flags, lv2flags, tagMap,
epool, vpool, tagCapacity, isRoot);
} else {
prunedCell += 1;
}
chart [l, r].Finish ();
}
}
return prunedCell;
}
private static void MatchUnaryRules(
LAPCFGrammar grammar,
HyperCell cell,
HyperEdgePool epool,
HyperVertexPool vpool,
int[] tagCapacity,
bool isRoot)
{
foreach (var cv in cell.l1v) {
if (cv == null) {
continue;
}
var rules = grammar.urules [cv.tag];
if (rules != null) {
foreach (var rule in rules) {
if (rule == null) {
break;
}
if (rule.ptag == grammar.ROOTID && !isRoot) {
continue;
}
if (isRoot && rule.ptag != grammar.ROOTID) {
continue;
}
if (cell.l2v [rule.ptag] == null) {
var cap = tagCapacity == null ? -1 : tagCapacity [rule.ptag];
cell.l2v [rule.ptag] = vpool.Allocate (false, rule.ptag, grammar.GetSubTagCount (rule.ptag), cap);
}
epool.Allocate (cell.l2v [rule.ptag], cv, rule.scores, null);
}
}
}
}
private static void MatchLexicon(
LAPCFGrammar table,
HyperCell cell,
int wid,
HyperEdgePool epool,
HyperVertexPool vpool,
int[] tagCapacity,
bool[] allowedTags,
double[] tagProbs,
bool isRoot)
{
var tv = new HyperVertex (true, wid, 1);
var trules = table.trules [wid];
foreach (var rule in trules) {
if (rule == null) {
break;
}
if (rule.tag == table.ROOTID && !isRoot) {
continue;
}
if (allowedTags != null && !allowedTags[rule.tag])
{
continue;
}
var xrule = rule;
if (tagProbs != null)
{
var xprob = tagProbs[rule.tag];
if (double.IsNegativeInfinity(xprob))
{
continue;
}
xrule = rule.Clone();
for (int i = 0; i < xrule.scores.Length; ++i)
{
if (!double.IsNegativeInfinity(xrule.scores[i]))
{
xrule.scores[i] += xprob;
}
}
}
var cap = tagCapacity == null ? -1 : tagCapacity [rule.tag];
cell.l1v [rule.tag] = vpool.Allocate (false, rule.tag, table.GetSubTagCount (rule.tag), cap);
epool.Allocate (cell.l1v [rule.tag], tv, xrule.scores, null);
if (isRoot && rule.tag != table.ROOTID)
{
continue;
}
cell.l2v [rule.tag] = vpool.Allocate (false, rule.tag, table.GetSubTagCount (rule.tag), cap);
epool.Allocate (cell.l2v [rule.tag], cell.l1v [rule.tag]);
}
}
private static void MatchBinaryRules(
LAPCFGrammar grammar,
HyperCell pcell,
HyperCell lcell,
HyperCell rcell,
HyperEdgePool epool,
HyperVertexPool vpool,
int[] tagCapacity,
bool isRoot)
{
foreach (var lv in lcell.l2v) {
var rprules = grammar.brules [lv.tag];
if (rprules == null) {
continue;
}
foreach (var rv in rcell.l2v) {
var prules = rprules [rv.tag];
if (prules == null) {
continue;
}
for (int p = 0; p < prules.Length; ++p) {
var rule = prules [p];
if (rule == null) {
break;
}
if (rule.ptag == grammar.ROOTID && !isRoot) {
continue;
}
if (pcell.l1v [rule.ptag] == null) {
var cap = tagCapacity == null ? -1 : tagCapacity [rule.ptag];
pcell.l1v [rule.ptag] = vpool.Allocate (false, rule.ptag, grammar.GetSubTagCount (rule.ptag), cap);
}
epool.Allocate (pcell.l1v [rule.ptag], lv, rv, rule.scores, null);
}
}
}
}
