tikhomirov@31: /*
tikhomirov@74:  * Copyright (c) 2011 TMate Software Ltd
tikhomirov@74:  *  
tikhomirov@74:  * This program is free software; you can redistribute it and/or modify
tikhomirov@74:  * it under the terms of the GNU General Public License as published by
tikhomirov@74:  * the Free Software Foundation; version 2 of the License.
tikhomirov@74:  *
tikhomirov@74:  * This program is distributed in the hope that it will be useful,
tikhomirov@74:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@74:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@74:  * GNU General Public License for more details.
tikhomirov@74:  *
tikhomirov@74:  * For information on how to redistribute this software under
tikhomirov@74:  * the terms of a license other than GNU General Public License
tikhomirov@102:  * contact TMate Software at support@hg4j.com
tikhomirov@31:  */
tikhomirov@74: package org.tmatesoft.hg.console;
tikhomirov@31: 
tikhomirov@178: import java.util.ArrayList;
tikhomirov@173: import java.util.Arrays;
tikhomirov@173: import java.util.Collections;
tikhomirov@173: import java.util.Comparator;
tikhomirov@31: import java.util.HashSet;
tikhomirov@173: import java.util.Iterator;
tikhomirov@173: import java.util.LinkedHashMap;
tikhomirov@31: import java.util.LinkedList;
tikhomirov@31: import java.util.List;
tikhomirov@178: import java.util.ListIterator;
tikhomirov@173: import java.util.Map.Entry;
tikhomirov@173: 
tikhomirov@176: import org.tmatesoft.hg.core.HgException;
tikhomirov@74: import org.tmatesoft.hg.core.Nodeid;
tikhomirov@181: import org.tmatesoft.hg.internal.RepositoryComparator;
tikhomirov@181: import org.tmatesoft.hg.internal.RepositoryComparator.BranchChain;
tikhomirov@97: import org.tmatesoft.hg.repo.HgChangelog;
tikhomirov@176: import org.tmatesoft.hg.repo.HgLookup;
tikhomirov@176: import org.tmatesoft.hg.repo.HgRemoteRepository;
tikhomirov@74: import org.tmatesoft.hg.repo.HgRepository;
tikhomirov@74: 
tikhomirov@31: 
tikhomirov@31: /**
tikhomirov@74:  * WORK IN PROGRESS, DO NOT USE
tikhomirov@173:  * hg incoming counterpart
tikhomirov@74:  * 
tikhomirov@74:  * @author Artem Tikhomirov
tikhomirov@74:  * @author TMate Software Ltd.
tikhomirov@31:  */
tikhomirov@31: public class Incoming {
tikhomirov@31: 
tikhomirov@31: 	public static void main(String[] args) throws Exception {
tikhomirov@176: 		if (Boolean.FALSE.booleanValue()) {
tikhomirov@173: 			new SequenceConstructor().test();
tikhomirov@173: 			return;
tikhomirov@173: 		}
tikhomirov@74: 		Options cmdLineOpts = Options.parse(args);
tikhomirov@74: 		HgRepository hgRepo = cmdLineOpts.findRepository();
tikhomirov@31: 		if (hgRepo.isInvalid()) {
tikhomirov@31: 			System.err.printf("Can't find repository in: %s\n", hgRepo.getLocation());
tikhomirov@31: 			return;
tikhomirov@31: 		}
tikhomirov@181: 		HgRemoteRepository hgRemote = new HgLookup().detectRemote("svnkit", hgRepo);
tikhomirov@181: 		if (hgRemote.isInvalid()) {
tikhomirov@181: 			System.err.printf("Remote repository %s is not valid", hgRemote.getLocation());
tikhomirov@181: 			return;
tikhomirov@176: 		}
tikhomirov@176: 		//
tikhomirov@31: 		// in fact, all we need from changelog is set of all nodeids. However, since ParentWalker reuses same Nodeids, it's not too expensive
tikhomirov@31: 		// to reuse it here, XXX although later this may need to be refactored
tikhomirov@98: 		final HgChangelog.ParentWalker pw = hgRepo.getChangelog().new ParentWalker();
tikhomirov@31: 		pw.init();
tikhomirov@31: 		//
tikhomirov@181: 		RepositoryComparator repoCompare = new RepositoryComparator(pw, hgRemote);
tikhomirov@181: 		repoCompare.compare(null);
tikhomirov@181: 		List<BranchChain> missingBranches0 = repoCompare.calculateMissingBranches();
tikhomirov@178: 		for (BranchChain bc : missingBranches0) {
tikhomirov@178: 			bc.dump();
tikhomirov@178: 			
tikhomirov@181: 			List<Nodeid> missing = visitBranches(repoCompare, bc);
tikhomirov@178: 			// Collections.reverse(missing); // useful to test output, from newer to older
tikhomirov@178: 			for (Nodeid n : missing) {
tikhomirov@178: 				if (pw.knownNode(n)) {
tikhomirov@178: 					System.out.println("Erroneous to fetch:" + n);
tikhomirov@178: 				} else {
tikhomirov@178: 					System.out.println(n);
tikhomirov@178: 				}
tikhomirov@178: 			}
tikhomirov@178: 			System.out.println("Branch done");
tikhomirov@31: 		}
tikhomirov@178: 		
tikhomirov@178: 	}
tikhomirov@178: 	
tikhomirov@176: 	
tikhomirov@181: 	private static List<Nodeid> visitBranches(RepositoryComparator repoCompare, BranchChain bc) throws HgException {
tikhomirov@178: 		if (bc == null) {
tikhomirov@178: 			return Collections.emptyList();
tikhomirov@178: 		}
tikhomirov@181: 		List<Nodeid> mine = repoCompare.completeBranch(bc.branchRoot, bc.branchHead);
tikhomirov@178: 		if (bc.isTerminal()) {
tikhomirov@178: 			return mine;
tikhomirov@178: 		}
tikhomirov@181: 		List<Nodeid> parentBranch1 = visitBranches(repoCompare, bc.p1);
tikhomirov@181: 		List<Nodeid> parentBranch2 = visitBranches(repoCompare, bc.p2);
tikhomirov@178: 		// merge
tikhomirov@178: 		LinkedList<Nodeid> merged = new LinkedList<Nodeid>();
tikhomirov@178: 		ListIterator<Nodeid> i1 = parentBranch1.listIterator(), i2 = parentBranch2.listIterator();
tikhomirov@178: 		while (i1.hasNext() && i2.hasNext()) {
tikhomirov@178: 			Nodeid n1 = i1.next();
tikhomirov@178: 			Nodeid n2 = i2.next();
tikhomirov@178: 			if (n1.equals(n2)) {
tikhomirov@178: 				merged.addLast(n1);
tikhomirov@178: 			} else {
tikhomirov@178: 				// first different => add both, and continue adding both tails sequentially 
tikhomirov@178: 				merged.add(n2);
tikhomirov@178: 				merged.add(n1);
tikhomirov@178: 				break;
tikhomirov@178: 			}
tikhomirov@178: 		}
tikhomirov@178: 		// copy rest of second parent branch
tikhomirov@178: 		while (i2.hasNext()) {
tikhomirov@178: 			merged.add(i2.next());
tikhomirov@178: 		}
tikhomirov@178: 		// copy rest of first parent branch
tikhomirov@178: 		while (i1.hasNext()) {
tikhomirov@178: 			merged.add(i1.next());
tikhomirov@178: 		}
tikhomirov@31: 		//
tikhomirov@178: 		ArrayList<Nodeid> rv = new ArrayList<Nodeid>(mine.size() + merged.size());
tikhomirov@178: 		rv.addAll(merged);
tikhomirov@178: 		rv.addAll(mine);
tikhomirov@178: 		return rv;
tikhomirov@178: 	}
tikhomirov@31: 
tikhomirov@31: 
tikhomirov@173: 	private static class SequenceConstructor {
tikhomirov@173: 
tikhomirov@173: 		private int[] between(int root, int head) {
tikhomirov@173: 			if (head <= (root+1)) {
tikhomirov@173: 				return new int[0];
tikhomirov@173: 			}
tikhomirov@173: 			System.out.printf("[%d, %d]\t\t", root, head);
tikhomirov@173: 			int size = 1 + (int) Math.floor(Math.log(head-root - 1) / Math.log(2));
tikhomirov@173: 			int[] rv = new int[size];
tikhomirov@173: 			for (int v = 1, i = 0; i < rv.length; i++) {
tikhomirov@173: 				rv[i] = root + v;
tikhomirov@173: 				v = v << 1;
tikhomirov@173: 			}
tikhomirov@173: 			System.out.println(Arrays.toString(rv));
tikhomirov@173: 			return rv;
tikhomirov@173: 		}
tikhomirov@173: 
tikhomirov@173: 		public void test() {
tikhomirov@176: 			int root = 0, head = 126;
tikhomirov@176: 			int[] data = between(root, head); // max number of elements to recover is 2**data.length-1, when head is exactly
tikhomirov@176: 			// 2**data.length element of the branch.  
tikhomirov@176: 			// In such case, total number of elements in the branch (including head and root, would be 2**data.length+1
tikhomirov@176: 			int[] finalSequence = new int[1 + (1 << data.length >>> 5)]; // div 32 - total bits to integers, +1 for possible modulus
tikhomirov@173: 			int exactNumberOfElements = -1; // exact number of meaningful bits in finalSequence
tikhomirov@173: 			LinkedHashMap<Integer, int[]> datas = new LinkedHashMap<Integer, int[]>();
tikhomirov@173: 			datas.put(root, data);
tikhomirov@173: 			int totalQueries = 1;
tikhomirov@173: 			HashSet<Integer> queried = new HashSet<Integer>();
tikhomirov@173: 			int[] checkSequence = null;
tikhomirov@173: 			while(!datas.isEmpty()) {
tikhomirov@173: 				LinkedList<int[]> toQuery = new LinkedList<int[]>();
tikhomirov@173: 				do {
tikhomirov@173: 					Iterator<Entry<Integer, int[]>> it = datas.entrySet().iterator();
tikhomirov@173: 					Entry<Integer, int[]> next = it.next();
tikhomirov@173: 					int r = next.getKey();
tikhomirov@173: 					data = next.getValue();
tikhomirov@173: 					it.remove();
tikhomirov@173: 					populate(r, head, data, finalSequence);
tikhomirov@173: 					if (checkSequence != null) {
tikhomirov@173: 						boolean match = true;
tikhomirov@173: //						System.out.println("Try to match:");
tikhomirov@173: 						for (int i = 0; i < checkSequence.length; i++) {
tikhomirov@173: //							System.out.println(i);
tikhomirov@173: //							System.out.println("control:" + toBinaryString(checkSequence[i], ' '));
tikhomirov@173: //							System.out.println("present:" + toBinaryString(finalSequence[i], ' '));
tikhomirov@173: 							if (checkSequence[i] != finalSequence[i]) {
tikhomirov@173: 								match = false;
tikhomirov@173: 							} else {
tikhomirov@173: 								match &= true;
tikhomirov@173: 							}
tikhomirov@173: 						}
tikhomirov@173: 						System.out.println(match ? "Match, on query:" + totalQueries : "Didn't match");
tikhomirov@173: 					}
tikhomirov@176: 					if (data.length > 1) { 
tikhomirov@176: 						/*queries for elements next to head is senseless, hence data.length check above and head-x below*/
tikhomirov@173: 						for (int x : data) {
tikhomirov@176: 							if (!queried.contains(x) && head - x > 1) { 
tikhomirov@173: 								toQuery.add(new int[] {x, head});
tikhomirov@173: 							}
tikhomirov@173: 						}
tikhomirov@173: 					}
tikhomirov@173: 				} while (!datas.isEmpty()) ;
tikhomirov@173: 				if (!toQuery.isEmpty()) {
tikhomirov@173: 					System.out.println();
tikhomirov@173: 					totalQueries++;
tikhomirov@173: 				}
tikhomirov@173: 				Collections.sort(toQuery, new Comparator<int[]>() {
tikhomirov@173: 
tikhomirov@173: 					public int compare(int[] o1, int[] o2) {
tikhomirov@173: 						return o1[0] < o2[0] ? -1 : (o1[0] == o2[0] ? 0 : 1);
tikhomirov@173: 					}
tikhomirov@173: 				});
tikhomirov@173: 				for (int[] x : toQuery) {
tikhomirov@173: 					if (!queried.contains(x[0])) {
tikhomirov@173: 						queried.add(x[0]);
tikhomirov@173: 						data = between(x[0], x[1]);
tikhomirov@173: 						if (exactNumberOfElements == -1 && data.length == 1) {
tikhomirov@173: 							exactNumberOfElements = x[0] + 1;
tikhomirov@173: 							System.out.printf("On query %d found out exact number of missing elements: %d\n", totalQueries, exactNumberOfElements);
tikhomirov@173: 							// get a bit sequence of exactNumberOfElements, 0111..110
tikhomirov@173: 							// to 'and' it with finalSequence later
tikhomirov@173: 							int totalInts = (exactNumberOfElements + 2 /*heading and tailing zero bits*/) >>> 5;
tikhomirov@173: 							int trailingBits = (exactNumberOfElements + 2) & 0x1f;
tikhomirov@173: 							if (trailingBits != 0) {
tikhomirov@173: 								totalInts++;
tikhomirov@173: 							}
tikhomirov@173: 							checkSequence = new int[totalInts];
tikhomirov@173: 							Arrays.fill(checkSequence, 0xffffffff);
tikhomirov@173: 							checkSequence[0] &= 0x7FFFFFFF;
tikhomirov@173: 							if (trailingBits == 0) {
tikhomirov@173: 								checkSequence[totalInts-1] &= 0xFFFFFFFE;
tikhomirov@173: 							} else if (trailingBits == 1) {
tikhomirov@173: 								checkSequence[totalInts-1] = 0;
tikhomirov@173: 							} else {
tikhomirov@173: 								// trailingBits include heading and trailing zero bits
tikhomirov@173: 								int mask = 0x80000000 >> trailingBits-2; // with sign!
tikhomirov@173: 								checkSequence[totalInts - 1] &= mask;
tikhomirov@173: 							}
tikhomirov@173: 							for (int e : checkSequence) {
tikhomirov@173: 								System.out.print(toBinaryString(e, ' '));
tikhomirov@173: 							}
tikhomirov@173: 							System.out.println();
tikhomirov@173: 						}
tikhomirov@173: 						datas.put(x[0], data);
tikhomirov@173: 					}
tikhomirov@173: 				}
tikhomirov@173: 			}
tikhomirov@173: 
tikhomirov@173: 			System.out.println("Total queries:" + totalQueries);
tikhomirov@173: 			for (int x : finalSequence) {
tikhomirov@173: 				System.out.print(toBinaryString(x, ' '));
tikhomirov@173: 			}
tikhomirov@173: 		}
tikhomirov@173: 		
tikhomirov@173: 		private void populate(int root, int head, int[] data, int[] finalSequence) {
tikhomirov@173: 			for (int i = 1, x = 0; root+i < head; i = i << 1, x++) {
tikhomirov@173: 				int value = data[x];
tikhomirov@173: 				int value_check = root+i;
tikhomirov@174: 				if (value != value_check) {
tikhomirov@174: 					throw new IllegalStateException();
tikhomirov@174: 				}
tikhomirov@173: 				int wordIx = (root + i) >>> 5;
tikhomirov@173: 				int bitIx = (root + i) & 0x1f;
tikhomirov@173: 				finalSequence[wordIx] |= 1 << (31-bitIx);
tikhomirov@173: 			}
tikhomirov@173: 		}
tikhomirov@173: 		
tikhomirov@173: 		private static String toBinaryString(int x, char byteSeparator) {
tikhomirov@173: 			StringBuilder sb = new StringBuilder(4*8+4);
tikhomirov@173: 			sb.append(toBinaryString((byte) (x >>> 24)));
tikhomirov@173: 			sb.append(byteSeparator);
tikhomirov@173: 			sb.append(toBinaryString((byte) ((x & 0x00ff0000) >>> 16)));
tikhomirov@173: 			sb.append(byteSeparator);
tikhomirov@173: 			sb.append(toBinaryString((byte) ((x & 0x00ff00) >>> 8)));
tikhomirov@173: 			sb.append(byteSeparator);
tikhomirov@173: 			sb.append(toBinaryString((byte) (x & 0x00ff)));
tikhomirov@173: 			sb.append(byteSeparator);
tikhomirov@173: 			return sb.toString();
tikhomirov@173: 		}
tikhomirov@173: 
tikhomirov@173: 		private static String toBinaryString(byte b) {
tikhomirov@173: 			final String nibbles = "0000000100100011010001010110011110001001101010111100110111101111";
tikhomirov@173: 			assert nibbles.length() == 16*4;
tikhomirov@173: 			int x1 = (b >>> 4) & 0x0f, x2 = b & 0x0f;
tikhomirov@173: 			x1 *= 4; x2 *= 4; // 4 characters per nibble
tikhomirov@173: 			return nibbles.substring(x1, x1+4).concat(nibbles.substring(x2, x2+4));
tikhomirov@173: 		}
tikhomirov@173: 	}
tikhomirov@31: }