--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hg4j/src/main/java/org/tmatesoft/hg/internal/ConfigFile.java	Tue May 10 10:52:53 2011 +0200
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2011 TMate Software Ltd
+ *  
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.internal;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ *
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class ConfigFile {
+
+	private List<String> sections;
+	private List<Map<String,String>> content;
+
+	ConfigFile() {
+	}
+
+	public void addLocation(File path) {
+		read(path);
+	}
+	
+	public boolean hasSection(String sectionName) {
+		return sections == null ? false : sections.indexOf(sectionName) == -1;
+	}
+	
+	// XXX perhaps, should be moved to subclass HgRepoConfig, as it is not common operation for any config file
+	public boolean hasEnabledExtension(String extensionName) {
+		int x = sections != null ? sections.indexOf("extensions") : -1;
+		if (x == -1) {
+			return false;
+		}
+		String value = content.get(x).get(extensionName);
+		return value != null && !"!".equals(value);
+	}
+	
+	public List<String> getSectionNames() {
+		return sections == null ? Collections.<String>emptyList() : Collections.unmodifiableList(sections);
+	}
+
+	public Map<String,String> getSection(String sectionName) {
+		if (sections ==  null) {
+			return Collections.emptyMap();
+		}
+		int x = sections.indexOf(sectionName);
+		if (x == -1) {
+			return Collections.emptyMap();
+		}
+		return Collections.unmodifiableMap(content.get(x));
+	}
+
+	public boolean getBoolean(String sectionName, String key, boolean defaultValue) {
+		String value = getSection(sectionName).get(key);
+		if (value == null) {
+			return defaultValue;
+		}
+		for (String s : new String[] { "true", "yes", "on", "1" }) {
+			if (s.equalsIgnoreCase(value)) {
+				return true;
+			}
+		}
+		return false;
+	}
+	
+	public String getString(String sectionName, String key, String defaultValue) {
+		String value = getSection(sectionName).get(key);
+		return value == null ? defaultValue : value;
+	}
+
+	// TODO handle %include and %unset directives
+	// TODO "" and lists
+	private void read(File f) {
+		if (f == null || !f.canRead()) {
+			return;
+		}
+		if (sections == null) {
+			sections = new ArrayList<String>();
+			content = new ArrayList<Map<String,String>>();
+		}
+		try {
+			BufferedReader br = new BufferedReader(new FileReader(f));
+			String line;
+			String sectionName = "";
+			Map<String,String> section = new LinkedHashMap<String, String>();
+			while ((line = br.readLine()) != null) {
+				line = line.trim();
+				int x;
+				if ((x = line.indexOf('#')) != -1) {
+					// do not keep comments in memory, get new, shorter string
+					line = new String(line.substring(0, x).trim());
+				}
+				if (line.length() <= 2) { // a=b or [a] are at least of length 3
+					continue;
+				}
+				if (line.charAt(0) == '[' && line.charAt(line.length() - 1) == ']') {
+					sectionName = line.substring(1, line.length() - 1);
+					if (sections.indexOf(sectionName) == -1) {
+						sections.add(sectionName);
+						content.add(section = new LinkedHashMap<String, String>());
+					} else {
+						section = null; // drop cached value
+					}
+				} else if ((x = line.indexOf('=')) != -1) {
+					// share char[] of the original string
+					String key = line.substring(0, x).trim();
+					String value = line.substring(x+1).trim();
+					if (section == null) {
+						int i = sections.indexOf(sectionName);
+						assert i >= 0;
+						section = content.get(i);
+					}
+					if (sectionName.length() == 0) {
+						// add fake section only if there are any values 
+						sections.add(sectionName);
+						content.add(section);
+					}
+					section.put(key, value);
+				}
+			}
+			br.close();
+		} catch (IOException ex) {
+			ex.printStackTrace(); // XXX shall outer world care?
+		}
+		((ArrayList<?>) sections).trimToSize();
+		((ArrayList<?>) content).trimToSize();
+		assert sections.size() == content.size();
+	}
+}