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communicates with cvsblame.cgi to assign blame to lines of a source file.
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beard%netscape.com
parent
f7bc2743c0
commit
e8e34c2bce
142
gc/boehm/leaksoup/BlameTable.java
Executable file
142
gc/boehm/leaksoup/BlameTable.java
Executable file
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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Patrick C. Beard <beard@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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import java.io.*;
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import java.util.*;
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import java.net.*;
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class Blame {
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String[] lines;
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Hashtable info;
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Blame(String[] lines, Hashtable info) {
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this.lines = lines;
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this.info = info;
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}
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}
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public class BlameTable {
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private Hashtable blameTable = new Hashtable();
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public String getBlame(String path, int line) {
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Blame blame = (Blame) blameTable.get(path);
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if (blame == null) {
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blame = assignBlame(path);
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blameTable.put(path, blame);
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}
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if (blame != null) {
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String[] lines = blame.lines;
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if (line > 0 && lines.length > 0 && line <= lines.length)
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return (String) blame.info.get(lines[line - 1]);
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}
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return "error";
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}
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static final String BLAME_BASE = "http://cvs-mirror.mozilla.org/webtools/bonsai/cvsblame.cgi?data=1&file=";
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private static int parseInt(String str) {
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int value = 0;
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try {
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value = Integer.parseInt(str);
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} catch (NumberFormatException nfe) {
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}
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return value;
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}
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/**
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* Contact bonsai, and get a blame table for each line in a file.
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* This information can be compressed, in all likelyhood.
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*/
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private Blame assignBlame(String path) {
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try {
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Vector vec = new Vector();
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URL url = new URL(BLAME_BASE + path);
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BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
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// read revision for each line of the file. this is really slow. I asked slam to
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// use buffered output, to speed this up.
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for (String line = reader.readLine(); line != null; line = reader.readLine()) {
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if (line.charAt(0) == 'R')
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break;
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// decompress "revision:count" to simplify getBlame() above.
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int colonIndex = line.indexOf(':');
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String revision = line.substring(0, colonIndex);
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int count = parseInt(line.substring(colonIndex + 1));
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while (count-- > 0)
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vec.addElement(revision);
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}
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String[] lines = new String[vec.size()];
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vec.copyInto(lines);
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vec.removeAllElements();
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// read revision records, which are of the form "rev|date|who|comment" where comment can span multiple lines,
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// and each record is terminated by a "." on its own line.
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Hashtable info = new Hashtable();
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String revision = null;
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StringBuffer buffer = new StringBuffer();
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for (String line = reader.readLine(); line != null; line = reader.readLine()) {
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// we're in one of two states, either we've seen a line starting with a revision,
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// and we're waiting for the final ending line, or we're starting a new revision
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// record.
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if (revision != null) {
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if (line.equals(".")) {
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// end of current revision record.
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info.put(revision, buffer.toString());
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revision = null;
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buffer.setLength(0);
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} else {
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// continuation of a comment
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buffer.append(" " + line);
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}
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} else {
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int orIndex = line.indexOf('|');
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if (orIndex >= 0) {
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// new revision info record.
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revision = line.substring(0, orIndex);
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buffer.append(line);
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}
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}
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}
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reader.close();
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return new Blame(lines, info);
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} catch (Exception e) {
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System.err.println("[error assigning blame for: " + path + "]");
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e.printStackTrace(System.err);
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}
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return null;
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}
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}
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