+// Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
+
package edu.berkeley.sbp;
import edu.berkeley.sbp.*;
import edu.berkeley.sbp.util.*;
import java.lang.reflect.*;
/** implements Tomita's Graph Structured Stack */
-public class GSS {
+class GSS {
+
+ public static Queue<Node> removals = new LinkedList<Node>();
+
+ static String note = "";
+ static int single_newnode = 0;
+ static int toplevel_reductions = 0;
+ static int multi_newnode = 0;
+ static int waiting_newnode = 0;
+ static int shifts = 0;
- public static int count = 0;
- public static int shifts = 0;
- public static int reductions = 0;
+ static int count = 0;
+ static int reductions = 0;
+ int resets = 0;
+ int waits = 0;
- public GSS() { }
+ Input input;
- private Phase.Node[] reducing_list = null;
- public int resets = 0;
- public int waits = 0;
+ public GSS(Input input) { this.input = input; }
+
+ private Node[] reducing_list = null;
// FIXME: right now, these are the performance bottleneck
HashMapBag<Sequence,Phase.Waiting> waiting = new HashMapBag<Sequence,Phase.Waiting>();
HashMapBag<Integer,Sequence> expected = new HashMapBag<Integer,Sequence>();
/** FIXME */
- public Forest.Ref finalResult;
+ Forest.Many finalResult;
/** corresponds to a positions <i>between tokens</i> the input stream; same as Tomita's U_i's */
- class Phase<Tok> implements Invokable<State, Forest, Phase<Tok>.Node>, IntegerMappable, GraphViz.ToGraphViz, Iterable<Phase.Node> {
+ class Phase<Tok> implements Invokable<State, Forest, Node>, IntegerMappable, GraphViz.ToGraphViz, Iterable<Node> {
+
+ public int pos() { return pos; }
+ public boolean closed() { return closed; }
+ public Tok token() { return token; }
- public Iterator<Phase.Node> iterator() { return hash.iterator(); }
+ public Iterator<Node> iterator() { return hash.iterator(); }
public void invoke(State st, Forest result, Node n) {
shifts++;
good |= next.newNode(n, result, st, false);
private final int pos;
boolean reducing;
- private IntPairMap<Phase.Node> hash; /* ALLOC */
+ public IntPairMap<Node> hash; /* ALLOC */
private boolean closed;
private boolean good;
private Phase next = null;
private Phase prev;
private Input.Location location;
+ private Input.Location nextLocation;
+ private Input.Location prevLocation;
+
public final Parser parser;
private Forest forest;
- public Phase(Phase prev, Parser parser, Phase previous, Tok token, Input.Location location, Forest forest) throws ParseFailed {
+ public Phase(Phase prev, Parser parser, Phase previous, Tok token, Input.Location location,
+ Input.Location nextLocation, Forest forest) throws ParseFailed {
+ this.prevLocation = prev==null ? location : prev.getLocation();
this.prev = prev;
this.forest = forest;
this.parser = parser;
this.pos = previous==null ? 0 : previous.pos+1;
this.token = token;
this.location = location;
+ this.nextLocation = nextLocation;
performed.clear();
reset();
}
lastperformed.clear();
lastperformed.addAll(performed);
performed.clear();
- hash = new IntPairMap<Phase.Node>();
+ hash = new IntPairMap<Node>();
reset = false;
good = false;
closed = false;
public boolean isDone() throws ParseFailed {
if (token != null) return false;
if (token==null && finalResult==null)
- throw new ParseFailed(ParseFailed.error(ANSI.red("unexpected end of file\n"), token, hash.values()), getLocation());
+ ParseFailed.error("unexpected end of file",
+ getLocation(),
+ token,
+ hash.values(),
+ getLocation().createRegion(getLocation()),
+ input,
+ GSS.this);
return true;
}
+ public Input.Location getPrevLocation() { return prevLocation; }
public Input.Location getLocation() { return location; }
+ public Input.Region getRegion() { return getPrevLocation().createRegion(getLocation()); }
+ public Input.Location getNextLocation() { return nextLocation; }
/** add a new node (merging with existing nodes if possible)
* @param parent the parent of the new node
}
}
}
- if (!owner.lame)
- newNode(parent, pending, state, fromEmptyReduction);
+ newNode(parent, pending, state, fromEmptyReduction);
if (reduction != null) {
boolean redo = true;
while(redo) {
private boolean newNode2(Node p, Node parent, Forest pending, State state, boolean fromEmptyReduction) {
if (p.merge(parent, pending)) return true;
- p.parents().add(parent, true);
+ p.addParent(parent, true);
if (p!=parent && !fromEmptyReduction && reducing) p.performReductions(parent);
return true;
}
//return;
} while(false);
- Node n = new Node(parent, pending, state); // ALLOC
+ Node n = new Node(Phase.this, parent, pending, state); // ALLOC
if (reducing) {
n.performEmptyReductions();
if (!fromEmptyReduction) n.performReductions(parent);
return true;
}
+ public LinkedList<Node> reductionQueue = new LinkedList<Node>();
+
/** perform all reduction operations */
public void reduce() throws ParseFailed {
try {
reducing = true;
if (reducing_list==null || reducing_list.length < hash.size())
- reducing_list = new Phase.Node[hash.size() * 4];
+ reducing_list = new Node[hash.size() * 4];
hash.toArray(reducing_list);
int num = hash.size();
for(int i=0; i<num; i++) {
// INVARIANT: we never "see" a node until its parent-set is complete, modulo merges
}
for(int i=0; i<num; i++) {
- Node n = reducing_list[i];
+ reductionQueue.add(reducing_list[i]);
reducing_list[i] = null;
- n.performReductions();
+ }
+ while(!reductionQueue.isEmpty()) {
+ reductionQueue.remove().performReductions();
}
if (reset) {
reset = false;
public void shift(Phase next, Forest result) throws ParseFailed {
// this massively improves GC performance
if (prev!=null && parser.helpgc) {
- prev.hash = null;
+ //prev.hash = null;
+ //System.out.println("\r" + /*shifts + " " + */ single_newnode /*+ "/"+multi_newnode + " " + waiting_newnode*/);
+ //System.out.println("\r" + shifts + " " + note);
+ //System.out.println("\r" + shifts);
+ //System.out.println("\r" + toplevel_reductions);
+ //System.out.println("\r" + multi_newnode);
+ single_newnode = 0;
+ note = "";
+ multi_newnode = 0;
+ toplevel_reductions = 0;
+ waiting_newnode = 0;
+ shifts = 0;
}
this.next = next;
closed = true;
Forest res = null;
boolean ok = false;
- for(Phase.Node n : hash.values()) {
- if (token == null && n.state.isAccepting()) {
- if (finalResult==null) finalResult = new Forest.Ref();
+ int count = 0;
+ for(Node n : hash.values()) {
+ if (token == null && n.state().isAccepting()) {
+ if (finalResult==null) finalResult = new Forest.Many();
for(Object f : n.results())
finalResult.merge((Forest)f);
}
if (token == null) continue;
- n.state.invokeShifts(token, this, result, n);
+ n.state().invokeShifts(token, this, result, n);
}
-
+ //System.out.println(next.hash.size());
if (!good && token!=null)
- throw new ParseFailed(ParseFailed.error(ANSI.red("unexpected character ")+" \'"+
- ANSI.purple(StringUtil.escapify(token+"", "\\\'\r\n"))+
- "\' encountered at "+
- ANSI.green(getLocation())+"\n", token, hash.values()),
- getLocation());
+ ParseFailed.error("unexpected character",
+ getLocation(),
+ token,
+ hash.values(),
+ getRegion(),
+ input,
+ GSS.this);
+
if (token==null && finalResult==null)
- throw new ParseFailed(ParseFailed.error(ANSI.red("unexpected end of file\n"), token, hash.values()),
- getLocation());
+ ParseFailed.error("unexpected end of file",
+ getLocation(),
+ token,
+ hash.values(),
+ getLocation().createRegion(getLocation()),
+ input,
+ GSS.this);
}
}
public void perform() {
//System.out.println("performing: " + reduction.position);
+ waiting_newnode++;
newNode(parent, pending, state, fromEmptyReduction, reduction);
}
}
- // Node /////////////////////////////////////////////////////////////////////////////////
-
- /** a node in the GSS */
- final class Node implements Invokable<Position, Node, Node>, IntegerMappable, GraphViz.ToGraphViz {
- public FastSet<Node> set = new FastSet<Node>();
-
-
- private boolean allqueued = false;
-
- /** what state this node is in */
- public final Parser.Table<Tok>.State<Tok> state;
-
- /** which Phase this Node belongs to (node that Node is also a non-static inner class of Phase) */
- public Phase phase() { return Phase.this; }
-
- private HashSet<Forest.Ref> resultMap = new HashSet<Forest.Ref>();
- public Iterable<Forest.Ref> results() { return resultMap; }
- public FastSet<Node> parents() { return set; }
- public boolean merge(Node parent, Forest result) {
- // FIXME: inefficient!
- for(Forest.Ref f : results()) {
- if (f.parents.contains(parent) /* UGLY: */ && f.parents.size()==1) {
- f.merge(result);
- return true;
- }
- }
- Forest.Ref f = new Forest.Ref();
- f.parents.add(parent);
- f.merge(result);
- resultMap.add(f);
- set.add(parent, true);
- return false;
- }
-
- public void performReductions() {
- if (allqueued) return;
- allqueued = true;
- state.invokeReductions(token, this, this, null);
- }
-
- public void performReductions(Node n2) {
- if (!allqueued) performReductions();
- else state.invokeReductions(token, this, this, n2);
- }
-
- public void performEmptyReductions() { state.invokeReductions(token, this, null, null); }
- public final void invoke(Position r, Node n, Node n2) {
- reductions++;
- if (n==null || n2==null || r.pos==0) {
- if (r.pos==0) {
- if (n==null) n = this;
- else return;
- }
- if (n==null) return;
- Forest[] holder = new Forest[r.pos];
- if (r.pos==0) n.finish(r, r.zero(), n.phase());
- else n.reduce(r, r.pos-1, n.phase(), null);
- } else {
- if (r.pos<=0) throw new Error("called wrong form of reduce()");
- int pos = r.pos-1;
- n.reduce(r, pos, n.phase(), n2);
- }
- }
-
- public void reduce(Position r, int pos, Phase target, Node only) {
- Forest[] holder = r.holder;
- Forest old = holder[pos];
-
- HashSet<Forest> rr = new HashSet<Forest>();
- for(Forest result : results()) rr.add(result);
- for(Forest result : rr)
- for(Node child : ((Forest.Ref<?>)result).parents) {
- if (only != null && child!=only) continue;
- holder[pos] = result;
- if (pos==0) child.finish(r, r.rewrite(new Input.Region(child.phase().getLocation(), phase().getLocation())), target);
- else child.reduce(r, pos-1, target, null);
- }
-
- holder[pos] = old;
- }
-
- public void finish(Position r, Forest result, Phase<Tok> target) {
- Parser.Table<Tok>.State<Tok> state0 = state.gotoSetNonTerminals.get(r.owner());
- if (result==null) throw new Error();
- if (state0!=null)
- target.newNode(this, result, state0, r.pos<=0, r);
- }
-
- private Node(Node parent, Forest pending, State state) {
- this.state = state;
- this.merge(parent, pending);
- Phase start = parent==null ? null : parent.phase();
- if (parent != null) parents().add(parent, true);
- if (Phase.this.hash.get(state, start) != null) throw new Error("severe problem!");
- Phase.this.hash.put(state, start, this);
- }
- public int toInt() { return idx; }
- private final int idx = node_idx++;
-
- // GraphViz //////////////////////////////////////////////////////////////////////////////
-
- public GraphViz.Node toGraphViz(GraphViz gv) {
- if (gv.hasNode(this)) return gv.createNode(this);
- GraphViz.Node n = gv.createNode(this);
- n.label = ""+state.toStringx();
- n.shape = "rectangle";
- n.fill = "green";
- for(Forest result : results()) n.edge(result, "");
- for(Node parent : parents()) n.edge(parent, "");
- ((GraphViz.Group)phase().toGraphViz(gv)).add(n);
- return n;
- }
- public boolean isTransparent() { return false; }
- public boolean isHidden() { return false; }
-
- }
- private int node_idx = 0;
public int toInt() { return pos+1; }
public int size() { return hash==null ? 0 : hash.size(); }
public boolean isHidden() { return false; }
}
+
}
projects / sbp.git / blobdiff