initial commit

29 files changed, 1414 insertions, 0 deletions

diff --git a/codan/org.eclipse.cdt.codan.checkers/.classpath b/codan/org.eclipse.cdt.codan.checkers/.classpath
new file mode 100644
index 00000000000..ad32c83a788
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/.classpath
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/codan/org.eclipse.cdt.codan.checkers/.project b/codan/org.eclipse.cdt.codan.checkers/.project
new file mode 100644
index 00000000000..6b76138faa3
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.cdt.codan.checkers</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/codan/org.eclipse.cdt.codan.checkers/.settings/org.eclipse.jdt.core.prefs b/codan/org.eclipse.cdt.codan.checkers/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 00000000000..4e9c2546d9a
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,8 @@
+#Sun Apr 05 18:00:01 EDT 2009
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.6
diff --git a/codan/org.eclipse.cdt.codan.checkers/META-INF/MANIFEST.MF b/codan/org.eclipse.cdt.codan.checkers/META-INF/MANIFEST.MF
new file mode 100644
index 00000000000..7e6aaf9f39a
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/META-INF/MANIFEST.MF
@@ -0,0 +1,13 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Checkers
+Bundle-SymbolicName: org.eclipse.cdt.codan.checkers;singleton:=true
+Bundle-Version: 1.0.0
+Bundle-Activator: org.eclipse.cdt.codan.checkers.Activator
+Require-Bundle: org.eclipse.ui,
+ org.eclipse.core.runtime,
+ org.eclipse.core.resources;bundle-version="3.5.0",
+ org.eclipse.cdt.core;bundle-version="5.1.0",
+ org.eclipse.cdt.codan.core;bundle-version="1.0.0"
+Bundle-ActivationPolicy: lazy
+Bundle-RequiredExecutionEnvironment: JavaSE-1.6
diff --git a/codan/org.eclipse.cdt.codan.checkers/build.properties b/codan/org.eclipse.cdt.codan.checkers/build.properties
new file mode 100644
index 00000000000..e9863e281ea
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/build.properties
@@ -0,0 +1,5 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               plugin.xml
diff --git a/codan/org.eclipse.cdt.codan.checkers/plugin.xml b/codan/org.eclipse.cdt.codan.checkers/plugin.xml
new file mode 100644
index 00000000000..99cf3432354
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/plugin.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+   <extension
+         point="org.eclipse.cdt.codan.core.checkers">
+
+      <checker
+            class="org.eclipse.cdt.codan.checkers.sample.AssignmentInConditionChecker"
+            id="org.eclipse.cdt.codan.checkers.checker1"
+            name="Assignment in condition">
+      <problem
+            defaultSeverity="Warning"
+            id="org.eclipse.cdt.codan.checkers.sample.assignment_in_condition"
+            name="Assignment in condition">
+      </problem>
+      </checker>
+   </extension>
+
+</plugin>
diff --git a/codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/Activator.java b/codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/Activator.java
new file mode 100644
index 00000000000..72e751f25d1
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/Activator.java
@@ -0,0 +1,50 @@
+package org.eclipse.cdt.codan.checkers;
+
+import org.eclipse.ui.plugin.AbstractUIPlugin;
+import org.osgi.framework.BundleContext;
+
+/**
+ * The activator class controls the plug-in life cycle
+ */
+public class Activator extends AbstractUIPlugin {
+
+	// The plug-in ID
+	public static final String PLUGIN_ID = "org.eclipse.cdt.codan.checkers";
+
+	// The shared instance
+	private static Activator plugin;
+	
+	/**
+	 * The constructor
+	 */
+	public Activator() {
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
+	 */
+	public void start(BundleContext context) throws Exception {
+		super.start(context);
+		plugin = this;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
+	 */
+	public void stop(BundleContext context) throws Exception {
+		plugin = null;
+		super.stop(context);
+	}
+
+	/**
+	 * Returns the shared instance
+	 *
+	 * @return the shared instance
+	 */
+	public static Activator getDefault() {
+		return plugin;
+	}
+
+}
diff --git a/codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/sample/AssignmentInConditionChecker.java b/codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/sample/AssignmentInConditionChecker.java
new file mode 100644
index 00000000000..69fc3d6638b
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/sample/AssignmentInConditionChecker.java
@@ -0,0 +1,62 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.checkers.sample;
+
+import org.eclipse.cdt.codan.core.model.AbstractIndexAstChecker;
+import org.eclipse.cdt.core.dom.ast.ASTNodeProperty;
+import org.eclipse.cdt.core.dom.ast.ASTVisitor;
+import org.eclipse.cdt.core.dom.ast.IASTBinaryExpression;
+import org.eclipse.cdt.core.dom.ast.IASTExpression;
+import org.eclipse.cdt.core.dom.ast.IASTForStatement;
+import org.eclipse.cdt.core.dom.ast.IASTIfStatement;
+import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
+
+public class AssignmentInConditionChecker extends AbstractIndexAstChecker {
+	private static final String ER_ID = "org.eclipse.cdt.codan.checkers.sample.assignment_in_condition";
+
+	@Override
+	public void processAst(IASTTranslationUnit ast) {
+		// traverse the ast using the visitor pattern.
+		ast.accept(new CheckCodeVisitor());
+	}
+
+	class CheckCodeVisitor extends ASTVisitor {
+		CheckCodeVisitor() {
+			shouldVisitExpressions = true;
+		}
+
+		public int visit(IASTExpression expression) {
+			if (isAssignmentExpression(expression)
+					&& isUsedAsCondition(expression)) {
+				reportProblem(ER_ID, getFile(), expression.getFileLocation()
+						.getStartingLineNumber(),
+						"Possible assignment in condition");
+			}
+			return PROCESS_CONTINUE;
+		}
+
+		private boolean isAssignmentExpression(IASTExpression e) {
+			if (e instanceof IASTBinaryExpression) {
+				IASTBinaryExpression binExpr = (IASTBinaryExpression) e;
+				return binExpr.getOperator() == IASTBinaryExpression.op_assign;
+			}
+			return false;
+		}
+
+		private boolean isUsedAsCondition(IASTExpression expression) {
+			ASTNodeProperty prop = expression.getPropertyInParent();
+			if (prop == IASTForStatement.CONDITION
+					|| prop == IASTIfStatement.CONDITION)
+				return true;
+			return false;
+		}
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/.classpath b/codan/org.eclipse.cdt.codan.core/.classpath
new file mode 100644
index 00000000000..ad32c83a788
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/.classpath
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/codan/org.eclipse.cdt.codan.core/.project b/codan/org.eclipse.cdt.codan.core/.project
new file mode 100644
index 00000000000..8ba33e61574
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.cdt.codan.core</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/codan/org.eclipse.cdt.codan.core/.settings/org.eclipse.jdt.core.prefs b/codan/org.eclipse.cdt.codan.core/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 00000000000..1c23d3d40c6
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,8 @@
+#Tue Apr 07 21:22:12 EDT 2009
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.6
diff --git a/codan/org.eclipse.cdt.codan.core/META-INF/MANIFEST.MF b/codan/org.eclipse.cdt.codan.core/META-INF/MANIFEST.MF
new file mode 100644
index 00000000000..520827b6981
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/META-INF/MANIFEST.MF
@@ -0,0 +1,15 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Code Analisys Core
+Bundle-SymbolicName: org.eclipse.cdt.codan.core;singleton:=true
+Bundle-Version: 1.0.0
+Bundle-Activator: org.eclipse.cdt.codan.core.CodanCorePlugin
+Bundle-Vendor: CDT
+Require-Bundle: org.eclipse.core.runtime,
+ org.eclipse.core.resources,
+ org.eclipse.cdt.core
+Bundle-RequiredExecutionEnvironment: JavaSE-1.6
+Bundle-ActivationPolicy: lazy
+Export-Package: org.eclipse.cdt.codan.core,
+ org.eclipse.cdt.codan.core.builder,
+ org.eclipse.cdt.codan.core.model
diff --git a/codan/org.eclipse.cdt.codan.core/build.properties b/codan/org.eclipse.cdt.codan.core/build.properties
new file mode 100644
index 00000000000..3595411e85a
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/build.properties
@@ -0,0 +1,6 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               plugin.xml,\
+               schema/
diff --git a/codan/org.eclipse.cdt.codan.core/plugin.xml b/codan/org.eclipse.cdt.codan.core/plugin.xml
new file mode 100644
index 00000000000..954c0210f13
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/plugin.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+   <extension-point id="checkers" name="Code Analysis Checkers" schema="schema/checkers.exsd"/>
+
+   <extension
+         id="codanBuilder"
+         name="Code Analysis Project Builder"
+         point="org.eclipse.core.resources.builders">
+      <builder
+            hasNature="true">
+         <run
+               class="org.eclipse.cdt.codan.core.builder.CodanBuilder">
+         </run>
+      </builder>
+   </extension>
+   <extension
+         id="codanNature"
+         name="CDT Code Analysis Nature"
+         point="org.eclipse.core.resources.natures">
+      <runtime>
+         <run
+               class="org.eclipse.cdt.codan.core.builder.CodeAnlysisNature">
+         </run>
+      </runtime>
+      <builder
+            id="org.eclipse.cdt.codan.core.codanBuilder">
+      </builder>
+   </extension>
+   <extension
+         id="codanProblem"
+         name="Code Analisys Problem"
+         point="org.eclipse.core.resources.markers">
+      <super
+            type="org.eclipse.core.resources.problemmarker">
+      </super>
+      <persistent
+            value="true">
+      </persistent>
+   </extension>
+   <extension
+         point="org.eclipse.core.runtime.preferences">
+   </extension>
+
+   
+
+</plugin>
diff --git a/codan/org.eclipse.cdt.codan.core/schema/checkers.exsd b/codan/org.eclipse.cdt.codan.core/schema/checkers.exsd
new file mode 100644
index 00000000000..71808a5bfa0
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/schema/checkers.exsd
@@ -0,0 +1,246 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Schema file written by PDE -->
+<schema targetNamespace="org.eclipse.cdt.codan.ui" xmlns="http://www.w3.org/2001/XMLSchema">
+<annotation>
+      <appinfo>
+         <meta.schema plugin="org.eclipse.cdt.codan.ui" id="checkers" name="Code Analysis Checkers"/>
+      </appinfo>
+      <documentation>
+         Define chckers for Code Analysis framework.
+      </documentation>
+   </annotation>
+
+   <element name="extension">
+      <annotation>
+         <appinfo>
+            <meta.element />
+         </appinfo>
+      </annotation>
+      <complexType>
+         <sequence minOccurs="1" maxOccurs="unbounded">
+            <choice>
+               <element ref="checker"/>
+               <element ref="category"/>
+            </choice>
+         </sequence>
+         <attribute name="point" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="checker">
+      <annotation>
+         <documentation>
+            Checker Element. Sets id, name and class that implements checker
+         </documentation>
+      </annotation>
+      <complexType>
+         <sequence minOccurs="0" maxOccurs="unbounded">
+            <choice>
+               <element ref="problem"/>
+            </choice>
+         </sequence>
+         <attribute name="id" type="string" use="required">
+            <annotation>
+               <documentation>
+                  Checker id.
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="class" type="string" use="required">
+            <annotation>
+               <documentation>
+                  Checker class. Must implement IChecker.
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="java" basedOn=":org.eclipse.cdt.codan.core.model.IChecker"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  User Friendly name of the chcker or error. Would be display to enable/disable an error.
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="problem">
+      <annotation>
+         <documentation>
+            Problem description (Error, Warning, Info produced by a checker)
+         </documentation>
+      </annotation>
+      <complexType>
+         <attribute name="id" type="string" use="required">
+            <annotation>
+               <documentation>
+                  Error id. Should be prefixed by plugin name in general.
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  User Friendly name of the error. Would be display to enable/disable an error.
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="defaultSeverity" use="default" value="Warning">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+            <simpleType>
+               <restriction base="string">
+                  <enumeration value="Error">
+                  </enumeration>
+                  <enumeration value="Warning">
+                  </enumeration>
+                  <enumeration value="Info">
+                  </enumeration>
+               </restriction>
+            </simpleType>
+         </attribute>
+         <attribute name="category" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.cdt.codan.core.checkers/category/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="category">
+      <complexType>
+         <attribute name="id" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string" use="required">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="parentCategory" type="string">
+            <annotation>
+               <documentation>
+                  
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.cdt.codan.core.checkers/category/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="since"/>
+      </appinfo>
+      <documentation>
+         1.0
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="examples"/>
+      </appinfo>
+      <documentation>
+         The following is an example of a single checker definition: 
+&lt;p&gt;
+&lt;pre&gt;
+   &lt;extension
+         point=&quot;org.eclipse.cdt.codan.ui.checkers&quot;&gt;
+      &lt;checker
+            class=&quot;org.aaa.AssignmentInConditionChecker&quot;
+            id=&quot;org.aaa.AssignmentInConditionChecker&quot;
+            name=&quot;Possible Assignment in Condition instead of comparision&quot;&gt;
+      &lt;/checker&gt;
+   &lt;/extension&gt;
+&lt;/pre&gt;
+&lt;/p&gt;
+The following is an example of a checker that produces two types of errors:
+&lt;p&gt;
+&lt;pre&gt;
+   &lt;extension
+         point=&quot;org.eclipse.cdt.codan.ui.checkers&quot;&gt;
+
+      &lt;checker
+            class=&quot;org.aaa.NullPointerDereferenceChecker&quot;
+            id=&quot;org.aaa.NullPointerDereferenceChecker&quot;
+            name=&quot;Null Pointer Dereference checker&quot;&gt;
+      &lt;problem id=&quot;org.aaa.npe_must&quot; name=&quot;Null Pointer Dereference&quot;/ defaultSeverity=&quot;Error&quot;&gt;
+      &lt;problem id=&quot;org.aaa.npe_may&quot; name=&quot;Possible Null Pointer Dereference&quot;/&gt;
+      &lt;/checker&gt;
+   &lt;/extension&gt;
+&lt;/pre&gt;
+&lt;/p&gt;
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="apiinfo"/>
+      </appinfo>
+      <documentation>
+         [Enter API information here.]
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="implementation"/>
+      </appinfo>
+      <documentation>
+         [Enter information about supplied implementation of this extension point.]
+      </documentation>
+   </annotation>
+
+
+</schema>
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/CodanCorePlugin.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/CodanCorePlugin.java
new file mode 100644
index 00000000000..1810762e144
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/CodanCorePlugin.java
@@ -0,0 +1,83 @@
+package org.eclipse.cdt.codan.core;
+
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Plugin;
+import org.eclipse.core.runtime.Status;
+import org.osgi.framework.BundleContext;
+
+/**
+ * The activator class controls the plug-in life cycle
+ */
+public class CodanCorePlugin extends Plugin {
+	// The plug-in ID
+	public static final String PLUGIN_ID = "org.eclipse.cdt.codan.core";
+	// The shared instance
+	private static CodanCorePlugin plugin;
+
+	/**
+	 * The constructor
+	 */
+	public CodanCorePlugin() {
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.eclipse.core.runtime.Plugins#start(org.osgi.framework.BundleContext)
+	 */
+	public void start(BundleContext context) throws Exception {
+		super.start(context);
+		plugin = this;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext)
+	 */
+	public void stop(BundleContext context) throws Exception {
+		plugin = null;
+		super.stop(context);
+	}
+
+	/**
+	 * Returns the shared instance
+	 * 
+	 * @return the shared instance
+	 */
+	public static CodanCorePlugin getDefault() {
+		return plugin;
+	}
+
+	/**
+	 * Logs the specified status with this plug-in's log.
+	 * 
+	 * @param status
+	 *            status to log
+	 */
+	public static void log(IStatus status) {
+		getDefault().getLog().log(status);
+	}
+
+	/**
+	 * Logs an internal error with the specified throwable
+	 * 
+	 * @param e
+	 *            the exception to be logged
+	 */
+	public static void log(Throwable e) {
+		log(new Status(IStatus.ERROR, PLUGIN_ID, 1, "Internal Error", e)); //$NON-NLS-1$
+	}
+
+	/**
+	 * Logs an internal error with the specified message.
+	 * 
+	 * @param message
+	 *            the error message to log
+	 */
+	public static void log(String message) {
+		log(new Status(IStatus.ERROR, PLUGIN_ID, 1, message, null));
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/builder/CodanBuilder.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/builder/CodanBuilder.java
new file mode 100644
index 00000000000..045ad426fca
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/builder/CodanBuilder.java
@@ -0,0 +1,120 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.builder;
+
+import java.util.Map;
+
+import org.eclipse.cdt.codan.core.CodanCorePlugin;
+import org.eclipse.cdt.codan.core.model.CheckersRegisry;
+import org.eclipse.cdt.codan.core.model.ErrorReporter;
+import org.eclipse.cdt.codan.core.model.IChecker;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.IResourceDelta;
+import org.eclipse.core.resources.IResourceDeltaVisitor;
+import org.eclipse.core.resources.IResourceVisitor;
+import org.eclipse.core.resources.IncrementalProjectBuilder;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+
+public class CodanBuilder extends IncrementalProjectBuilder {
+	public static final String BUILDER_ID = "org.eclipse.cdt.codan.core.codanBuilder";
+
+	public class CodanDeltaVisitor implements IResourceDeltaVisitor {
+		/*
+		 * (non-Javadoc)
+		 * 
+		 * @see
+		 * org.eclipse.core.resources.IResourceDeltaVisitor#visit(org.eclipse
+		 * .core.resources.IResourceDelta)
+		 */
+		public boolean visit(IResourceDelta delta) throws CoreException {
+			IResource resource = delta.getResource();
+			switch (delta.getKind()) {
+			case IResourceDelta.ADDED:
+				// handle added resource
+				processResource(resource);
+				break;
+			case IResourceDelta.REMOVED:
+				// handle removed resource
+				break;
+			case IResourceDelta.CHANGED:
+				// handle changed resource
+				processResource(resource);
+				break;
+			}
+			// return true to continue visiting children.
+			return true;
+		}
+	}
+
+	public class CodanResourceVisitor implements IResourceVisitor {
+		public boolean visit(IResource resource) {
+			processResource(resource);
+			// return true to continue visiting children.
+			return true;
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.core.internal.events.InternalBuilder#build(int,
+	 * java.util.Map, org.eclipse.core.runtime.IProgressMonitor)
+	 */
+	protected IProject[] build(int kind, Map args, IProgressMonitor monitor)
+			throws CoreException {
+		if (kind == FULL_BUILD) {
+			fullBuild(monitor);
+		} else {
+			IResourceDelta delta = getDelta(getProject());
+			if (delta == null) {
+				fullBuild(monitor);
+			} else {
+				incrementalBuild(delta, monitor);
+			}
+		}
+		return null;
+	}
+
+	public void processResource(IResource resource) {
+		// String string = Platform.getPreferencesService().getString(
+		// CodanCorePlugin.PLUGIN_ID, "problems", "", null);
+		// System.err.println("set = " + string);
+		// delete general markers
+		ErrorReporter.deleteMarkers(resource);
+		for (IChecker checker : CheckersRegisry.getInstance()) {
+			try {
+				boolean run = false;
+				if (checker.enabledInContext(resource))
+					run = true;
+				if (run)
+					checker.processResource(resource);
+			} catch (Throwable e) {
+				CodanCorePlugin.log(e);
+			}
+		}
+	}
+
+	protected void fullBuild(final IProgressMonitor monitor)
+			throws CoreException {
+		try {
+			getProject().accept(new CodanResourceVisitor());
+		} catch (CoreException e) {
+		}
+	}
+
+	protected void incrementalBuild(IResourceDelta delta,
+			IProgressMonitor monitor) throws CoreException {
+		// the visitor does the work.
+		delta.accept(new CodanDeltaVisitor());
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/builder/CodeAnlysisNature.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/builder/CodeAnlysisNature.java
new file mode 100644
index 00000000000..4f06e716c36
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/builder/CodeAnlysisNature.java
@@ -0,0 +1,88 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.builder;
+
+import org.eclipse.core.resources.ICommand;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IProjectDescription;
+import org.eclipse.core.resources.IProjectNature;
+import org.eclipse.core.runtime.CoreException;
+
+public class CodeAnlysisNature implements IProjectNature {
+	/**
+	 * ID of this project nature
+	 */
+	public static final String NATURE_ID = "org.eclipse.cdt.codan.core.codanNature";
+	private IProject project;
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.core.resources.IProjectNature#configure()
+	 */
+	public void configure() throws CoreException {
+		IProjectDescription desc = project.getDescription();
+		ICommand[] commands = desc.getBuildSpec();
+		for (int i = 0; i < commands.length; ++i) {
+			if (commands[i].getBuilderName().equals(CodanBuilder.BUILDER_ID)) {
+				return;
+			}
+		}
+		ICommand[] newCommands = new ICommand[commands.length + 1];
+		System.arraycopy(commands, 0, newCommands, 0, commands.length);
+		ICommand command = desc.newCommand();
+		command.setBuilderName(CodanBuilder.BUILDER_ID);
+		newCommands[newCommands.length - 1] = command;
+		desc.setBuildSpec(newCommands);
+		project.setDescription(desc, null);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.core.resources.IProjectNature#deconfigure()
+	 */
+	public void deconfigure() throws CoreException {
+		IProjectDescription description = getProject().getDescription();
+		ICommand[] commands = description.getBuildSpec();
+		for (int i = 0; i < commands.length; ++i) {
+			if (commands[i].getBuilderName().equals(CodanBuilder.BUILDER_ID)) {
+				ICommand[] newCommands = new ICommand[commands.length - 1];
+				System.arraycopy(commands, 0, newCommands, 0, i);
+				System.arraycopy(commands, i + 1, newCommands, i,
+						commands.length - i - 1);
+				description.setBuildSpec(newCommands);
+				project.setDescription(description, null);
+				return;
+			}
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.core.resources.IProjectNature#getProject()
+	 */
+	public IProject getProject() {
+		return project;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see
+	 * org.eclipse.core.resources.IProjectNature#setProject(org.eclipse.core
+	 * .resources.IProject)
+	 */
+	public void setProject(IProject project) {
+		this.project = project;
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/AbstractChecker.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/AbstractChecker.java
new file mode 100644
index 00000000000..e56437dc65e
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/AbstractChecker.java
@@ -0,0 +1,30 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IResource;
+
+public abstract class AbstractChecker implements IChecker {
+	String name;
+
+	public AbstractChecker() {
+	}
+
+	public boolean enabledInContext(IResource res) {
+		return true;
+	}
+
+	public void reportProblem(String id, IFile file, int lineNumber,
+			String message) {
+		ErrorReporter.reportProblem(id, file, lineNumber, message);
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/AbstractIndexAstChecker.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/AbstractIndexAstChecker.java
new file mode 100644
index 00000000000..5b6855784f4
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/AbstractIndexAstChecker.java
@@ -0,0 +1,70 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import org.eclipse.cdt.codan.core.CodanCorePlugin;
+import org.eclipse.cdt.core.CCorePlugin;
+import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
+import org.eclipse.cdt.core.index.IIndex;
+import org.eclipse.cdt.core.model.CoreModel;
+import org.eclipse.cdt.core.model.ITranslationUnit;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.runtime.CoreException;
+
+/**
+ * @author Alena
+ * 
+ */
+public abstract class AbstractIndexAstChecker extends AbstractChecker implements
+		ICAstChecker {
+	private IFile file;
+
+	public IFile getFile() {
+		return file;
+	}
+
+	void processFile(IFile file) throws CoreException, InterruptedException {
+		this.file = file;
+		// create translation unit and access index
+		ITranslationUnit tu = (ITranslationUnit) CoreModel.getDefault().create(
+				file);
+		if (tu == null)
+			return; // not a C/C++ file
+		IIndex index = CCorePlugin.getIndexManager().getIndex(tu.getCProject());
+		// lock the index for read access
+		index.acquireReadLock();
+		try {
+			// create index based ast
+			IASTTranslationUnit ast = tu.getAST(index,
+					ITranslationUnit.AST_SKIP_INDEXED_HEADERS);
+			// traverse the ast using the visitor pattern.
+			processAst(ast);
+		} finally {
+			index.releaseReadLock();
+		}
+	}
+
+	public boolean processResource(IResource resource) {
+		if (resource instanceof IFile) {
+			IFile file = (IFile) resource;
+			try {
+				processFile(file);
+			} catch (CoreException e) {
+				CodanCorePlugin.log(e);
+			} catch (InterruptedException e) {
+				// ignore
+			}
+			return false;
+		}
+		return true;
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CheckersRegisry.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CheckersRegisry.java
new file mode 100644
index 00000000000..d2dd4975b46
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CheckersRegisry.java
@@ -0,0 +1,183 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+
+import org.eclipse.cdt.codan.core.CodanCorePlugin;
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtensionPoint;
+import org.eclipse.core.runtime.Platform;
+
+public class CheckersRegisry implements Iterable<IChecker> {
+	private static final String EXTENSION_POINT_NAME = "checkers";
+	private static final String CHECKER_ELEMENT = "checker";
+	private static final String PROBLEM_ELEMENT = "problem";
+	private Collection<IChecker> checkers = new ArrayList<IChecker>();
+	private static CheckersRegisry instance;
+	private IProblemCategory rootCategory = new CodanProblemCategory("root",
+			"root");
+	private Collection<IProblem> problems = new ArrayList<IProblem>();
+
+	private CheckersRegisry() {
+		instance = this;
+		readCheckersRegistry();
+	}
+
+	private void readCheckersRegistry() {
+		IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(
+				CodanCorePlugin.PLUGIN_ID, EXTENSION_POINT_NAME);
+		if (ep == null)
+			return;
+		IConfigurationElement[] elements = ep.getConfigurationElements();
+		// process categories
+		// process shared problems
+		for (int i = 0; i < elements.length; i++) {
+			IConfigurationElement configurationElement = elements[i];
+			processProblem(configurationElement);
+		}
+		// process checkers
+		for (int i = 0; i < elements.length; i++) {
+			IConfigurationElement configurationElement = elements[i];
+			processChecker(configurationElement);
+		}
+	}
+
+	/**
+	 * @param configurationElement
+	 */
+	private void processChecker(IConfigurationElement configurationElement) {
+		try {
+			if (configurationElement.getName().equals(CHECKER_ELEMENT)) {
+				String id = getAtt(configurationElement, "id");
+				if (id == null)
+					return;
+				String name = getAtt(configurationElement, "name", false);
+				if (name == null)
+					name = id;
+				IChecker checkerObj = null;
+				try {
+					Object checker = configurationElement
+							.createExecutableExtension("class");
+					checkerObj = (IChecker) checker;
+					addChecker(checkerObj);
+				} catch (CoreException e) {
+					CodanCorePlugin.log(e);
+					return;
+				}
+				IConfigurationElement[] children1 = configurationElement
+						.getChildren("problemRef");
+				boolean hasRef = false;
+				IConfigurationElement[] children2 = configurationElement
+						.getChildren(PROBLEM_ELEMENT);
+				if (children2 != null) {
+					for (IConfigurationElement ref : children2) {
+						IProblem p = processProblem(ref);
+						addRefProblem(checkerObj, p);
+						hasRef = true;
+					}
+				}
+				if (children1 != null) {
+					for (IConfigurationElement ref : children1) {
+						hasRef = true;
+						IProblem p = getProblemById(ref.getAttribute("refId"),
+								null);
+						addRefProblem(checkerObj, p);
+					}
+				}
+				if (!hasRef) {
+					addProblem(new CodanProblem(id, name));
+				}
+			}
+		} catch (Exception e) {
+			CodanCorePlugin.log(e);
+		}
+	}
+
+	/**
+	 * @param configurationElement
+	 * @return
+	 */
+	private CodanProblem processProblem(
+			IConfigurationElement configurationElement) {
+		if (configurationElement.getName().equals(PROBLEM_ELEMENT)) {
+			String id = getAtt(configurationElement, "id");
+			if (id == null)
+				return null;
+			String name = getAtt(configurationElement, "name");
+			if (name == null)
+				name = id;
+			CodanProblem p = new CodanProblem(id, name);
+			addProblem(p);
+			return p;
+		}
+		return null;
+	}
+
+	private static String getAtt(IConfigurationElement configurationElement,
+			String name) {
+		return getAtt(configurationElement, name, true);
+	}
+
+	private static String getAtt(IConfigurationElement configurationElement,
+			String name, boolean req) {
+		String elementValue = configurationElement.getAttribute(name);
+		if (elementValue == null && req)
+			CodanCorePlugin.log("Extension "
+					+ configurationElement.getDeclaringExtension()
+							.getUniqueIdentifier()
+					+ " missing required attribute: " + name);
+		return elementValue;
+	}
+
+	public Iterator<IChecker> iterator() {
+		return checkers.iterator();
+	}
+
+	public static CheckersRegisry getInstance() {
+		if (instance == null)
+			new CheckersRegisry();
+		return instance;
+	}
+
+	public void addChecker(IChecker checker) {
+		checkers.add(checker);
+	}
+
+	public void addProblem(IProblem p) {
+		problems.add(p); // TODO category
+		((CodanProblemCategory) rootCategory).addChild(p);
+	}
+
+	public Object getProblemsTree() {
+		return rootCategory;
+	}
+
+	public void addRefProblem(IChecker c, IProblem p) {
+	}
+
+	public IProblem findProblem(String id) {
+		for (Iterator iterator = problems.iterator(); iterator.hasNext();) {
+			IProblem p = (IProblem) iterator.next();
+			if (p.getId().equals(id))
+				return p;
+		}
+		return null;
+	}
+
+	public IProblem getProblemById(String id, IFile file) {
+		return findProblem(id);
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanProblem.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanProblem.java
new file mode 100644
index 00000000000..7cc86d02758
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanProblem.java
@@ -0,0 +1,59 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+public class CodanProblem implements IProblem {
+	private String id;
+	private String name;
+	private CodanSeverity severity = CodanSeverity.Warning;
+	private boolean enabled = true;
+
+	public CodanSeverity getSeverity() {
+		return severity;
+	}
+
+	public CodanProblem(String id2, String name2) {
+		this.id = id2;
+		this.name = name2;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public IProblemCategory getCategory() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@Override
+	public String toString() {
+		return name;
+	}
+
+	public boolean isEnabled() {
+		return enabled;
+	}
+
+	public void setSeverity(CodanSeverity sev) {
+		if (sev == null)
+			throw new NullPointerException();
+		this.severity = sev;
+	}
+
+	public void setEnabled(boolean checked) {
+		this.enabled = checked;
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanProblemCategory.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanProblemCategory.java
new file mode 100644
index 00000000000..2a47418751e
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanProblemCategory.java
@@ -0,0 +1,52 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import java.util.ArrayList;
+
+
+public class CodanProblemCategory implements IProblemCategory {
+	private String id;
+	private String name;
+
+	private ArrayList list = new ArrayList();
+	public CodanProblemCategory(String id, String name) {
+		this.id = id;
+		this.name = name;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	@Override
+	public String toString() {
+		return name;
+	}
+	public Object[] getChildren() {
+		return list.toArray();
+	}
+
+	public void addChild(IProblem p) {
+		list.add(p);
+	}
+
+	public IProblemCategory getParent() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanSeverity.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanSeverity.java
new file mode 100644
index 00000000000..49fc484538e
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/CodanSeverity.java
@@ -0,0 +1,27 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import org.eclipse.core.resources.IMarker;
+
+public enum CodanSeverity {
+	Info(IMarker.SEVERITY_INFO), Warning(IMarker.SEVERITY_WARNING), Error(
+			IMarker.SEVERITY_ERROR);
+	private int value;
+
+	private CodanSeverity(int value) {
+		this.value = value;
+	}
+
+	public int intValue() {
+		return value;
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/ErrorReporter.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/ErrorReporter.java
new file mode 100644
index 00000000000..8196ca531b5
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/ErrorReporter.java
@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IMarker;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.ResourcesPlugin;
+import org.eclipse.core.runtime.CoreException;
+
+public class ErrorReporter {
+	public static final String GENERIC_CODE_ANALYSIS_MARKER_TYPE = "org.eclipse.cdt.codan.core.codanProblem";
+
+	public static void reportProblem(String id, IFile file, int lineNumber,
+			String message) {
+		try {
+			if (file == null)
+				throw new NullPointerException("file");
+			if (id == null)
+				throw new NullPointerException("id");
+			IProblem problem = CheckersRegisry.getInstance().getProblemById(id,
+					file);
+			if (problem == null)
+				throw new IllegalArgumentException("Id is not registered");
+			if (problem.isEnabled() == false)
+				return; // skip
+			int severity = problem.getSeverity().intValue();
+			IMarker marker = file
+					.createMarker(GENERIC_CODE_ANALYSIS_MARKER_TYPE);
+			marker.setAttribute(IMarker.MESSAGE, message);
+			marker.setAttribute(IMarker.SEVERITY, severity);
+			if (lineNumber == -1) {
+				lineNumber = 1;
+			}
+			marker.setAttribute(IMarker.LINE_NUMBER, lineNumber);
+		} catch (CoreException e) {
+			e.printStackTrace();
+		}
+	}
+
+	public static void deleteMarkers(IResource file) {
+		try {
+			file.deleteMarkers(GENERIC_CODE_ANALYSIS_MARKER_TYPE, false,
+					IResource.DEPTH_ZERO);
+		} catch (CoreException ce) {
+		}
+	}
+
+	public static void deleteAllMarkers() {
+		try {
+			// TODO delete contributed markers too
+			ResourcesPlugin.getWorkspace().getRoot().deleteMarkers(
+					GENERIC_CODE_ANALYSIS_MARKER_TYPE, false,
+					IResource.DEPTH_INFINITE);
+		} catch (CoreException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+	}
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/ICAstChecker.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/ICAstChecker.java
new file mode 100644
index 00000000000..461c0fa6f6c
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/ICAstChecker.java
@@ -0,0 +1,21 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
+
+/**
+ * @author Alena
+ * 
+ */
+public interface ICAstChecker extends IChecker {
+	void processAst(IASTTranslationUnit ast);
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IChecker.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IChecker.java
new file mode 100644
index 00000000000..c1ccd96bea6
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IChecker.java
@@ -0,0 +1,19 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+import org.eclipse.core.resources.IResource;
+
+public interface IChecker {
+	public boolean processResource(IResource resource);
+
+	boolean enabledInContext(IResource resource);
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IProblem.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IProblem.java
new file mode 100644
index 00000000000..6079963dd98
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IProblem.java
@@ -0,0 +1,24 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+
+public interface IProblem {
+	String getName();
+
+	String getId();
+
+	boolean isEnabled();
+
+	CodanSeverity getSeverity();
+
+	IProblemCategory getCategory();
+}
diff --git a/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IProblemCategory.java b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IProblemCategory.java
new file mode 100644
index 00000000000..bd9c60d66da
--- /dev/null
+++ b/codan/org.eclipse.cdt.codan.core/src/org/eclipse/cdt/codan/core/model/IProblemCategory.java
@@ -0,0 +1,21 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Alena Laskavaia 
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Alena Laskavaia  - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.cdt.codan.core.model;
+
+public interface IProblemCategory {
+	String getName();
+
+	String getId();
+	Object[] getChildren();
+
+	IProblemCategory getParent();
+
+}