build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/internal/ui/text/makefile/MakefilePartitionScanner.java - cdt/org.eclipse.cdt - Git at Google

 /**********************************************************************
  * Copyright (c) 2002,2003 QNX Software Systems and others.
  * All rights reserved.   This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  * QNX Software Systems - Initial API and implementation
 ***********************************************************************/
 package org.eclipse.cdt.make.internal.ui.text.makefile;

 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.jface.text.rules.EndOfLineRule;
 import org.eclipse.jface.text.rules.ICharacterScanner;
 import org.eclipse.jface.text.rules.IPredicateRule;
 import org.eclipse.jface.text.rules.IToken;
 import org.eclipse.jface.text.rules.MultiLineRule;
 import org.eclipse.jface.text.rules.RuleBasedPartitionScanner;
 import org.eclipse.jface.text.rules.Token;

 public class MakefilePartitionScanner extends RuleBasedPartitionScanner {
 	// Partition types
 	public final static String MAKEFILE_COMMENT = "makefile_comment"; //$NON-NLS-1$
 	public final static String MAKEFILE_MACRO_ASSIGNEMENT = "makefile_macro_assignement"; //$NON-NLS-1$
 	public final static String MAKEFILE_INCLUDE_BLOCK = "makefile_include_block"; //$NON-NLS-1$
 	public final static String MAKEFILE_IF_BLOCK = "makefile_if_block"; //$NON-NLS-1$
 	public final static String MAKEFILE_DEF_BLOCK = "makefile_def_block"; //$NON-NLS-1$
 	public final static String MAKEFILE_OTHER = "makefile_other"; //$NON-NLS-1$

 	public final static String[] TYPES =
 		new String[] {
 			MAKEFILE_COMMENT,
 			MAKEFILE_MACRO_ASSIGNEMENT,
 			MAKEFILE_INCLUDE_BLOCK,
 			MAKEFILE_IF_BLOCK,
 			MAKEFILE_DEF_BLOCK,
 			MAKEFILE_OTHER,
 		// All other
 	};

 	/** The predefined delimiters of this tracker */
 	private char[][] fModDelimiters = { { '\r', '\n' }, {
 			'\r' }, {
 			'\n' }
 	};

 	/**
 	 * Constructor for MakefilePartitionScanner
 	 */
 	public MakefilePartitionScanner() {
 		super();

 		IToken tComment = new Token(MAKEFILE_COMMENT);
 		IToken tMacro = new Token(MAKEFILE_MACRO_ASSIGNEMENT);
 		IToken tInclude = new Token(MAKEFILE_INCLUDE_BLOCK);
 		IToken tIf = new Token(MAKEFILE_IF_BLOCK);
 		IToken tDef = new Token(MAKEFILE_DEF_BLOCK);
 		IToken tOther = new Token(MAKEFILE_OTHER);

 		List rules = new ArrayList();

 		// Add rule for single line comments.

 		rules.add(new EndOfLineRule("#", tComment, '\\')); //$NON-NLS-1$

 		rules.add(new EndOfLineRule("include", tInclude)); //$NON-NLS-1$

 		rules.add(new EndOfLineRule("export", tDef)); //$NON-NLS-1$
 		rules.add(new EndOfLineRule("unexport", tDef)); //$NON-NLS-1$
 		rules.add(new EndOfLineRule("vpath", tDef)); //$NON-NLS-1$
 		rules.add(new EndOfLineRule("override", tDef)); //$NON-NLS-1$
 		rules.add(new MultiLineRule("define", "endef", tDef)); //$NON-NLS-1$
 		rules.add(new MultiLineRule("override define", "endef", tDef)); //$NON-NLS-1$

 		// Add rules for multi-line comments and javadoc.
 		rules.add(new MultiLineRule("ifdef", "endif", tIf)); //$NON-NLS-1$
 		rules.add(new MultiLineRule("ifndef", "endif", tIf)); //$NON-NLS-1$
 		rules.add(new MultiLineRule("ifeq", "endif", tIf)); //$NON-NLS-1$
 		rules.add(new MultiLineRule("ifnneq", "endif", tIf)); //$NON-NLS-1$

 		// Last rule must be supplied with default token!
 		rules.add(new MacroRule(tMacro, tOther)); //$NON-NLS-1$

 		IPredicateRule[] result = new IPredicateRule[rules.size()];
 		rules.toArray(result);
 		setPredicateRules(result);

 	}

 	/*
 	 * @see ICharacterScanner#getLegalLineDelimiters
 	 */
 	public char[][] getLegalLineDelimiters() {
 		return fModDelimiters;
 	}

 	private class MacroRule implements IPredicateRule {
 		private static final int INIT_STATE = 0;
 		private static final int VAR_STATE = 1;
 		private static final int END_VAR_STATE = 2;
 		private static final int EQUAL_STATE = 3;
 		private static final int FINISH_STATE = 4;
 		private static final int ERROR_STATE = 5;

 		private IToken token;
 		private StringBuffer buffer = new StringBuffer();
 		protected IToken defaultToken;
 		public MacroRule(IToken token, IToken defaultToken) {
 			this.token = token;
 			this.defaultToken = defaultToken;
 		}

 		public IToken getSuccessToken() {
 			return token;
 		}

 		public IToken evaluate(ICharacterScanner scanner, boolean resume) {
 			buffer.setLength(0);
 			int state = INIT_STATE;

 			if (resume)
 				scanToBeginOfLine(scanner);

 			for (int c = scanner.read(); c != ICharacterScanner.EOF; c = scanner.read()) {
 				switch (state) {
 					case INIT_STATE :
 						if (c != '\n' && Character.isWhitespace((char) c))
 							break;
 						if (isValidCharacter(c))
 							state = VAR_STATE;
 						else
 							state = ERROR_STATE;
 						break;
 					case VAR_STATE :
 						if (isValidCharacter(c))
 							break;
 					case END_VAR_STATE :
 						if (c != '\n' && Character.isWhitespace((char) c))
 							state = END_VAR_STATE;
 						else if (c == ':' || c == '+')
 							state = EQUAL_STATE;
 						else if (c == '=')
 							state = FINISH_STATE;
 						else {
 							if (state == END_VAR_STATE)
 								scanner.unread(); // Return back to the space
 							state = ERROR_STATE;
 						}
 						break;
 					case EQUAL_STATE :
 						if (c == '=')
 							state = FINISH_STATE;
 						else
 							state = ERROR_STATE;
 						break;
 					case FINISH_STATE :
 						break;
 					default :
 						break;
 				}
 				if (state >= FINISH_STATE)
 					break;
 				buffer.append((char) c);
 			}

 			scanner.unread();

 			if (state == FINISH_STATE) {
 				scanToEndOfLine(scanner);
 				return token;
 			}

 			if (defaultToken.isUndefined())
 				unreadBuffer(scanner);

 			return Token.UNDEFINED;

 		}

 		public IToken evaluate(ICharacterScanner scanner) {
 			return evaluate(scanner, false);
 		}

 		/**
 		 * Returns the characters in the buffer to the scanner.
 		 *
 		 * @param scanner the scanner to be used
 		 */
 		protected void unreadBuffer(ICharacterScanner scanner) {
 			for (int i = buffer.length() - 1; i >= 0; i--)
 				scanner.unread();
 		}

 		private void scanToEndOfLine(ICharacterScanner scanner) {
 			int c;
 			char[][] delimiters = scanner.getLegalLineDelimiters();
 			while ((c = scanner.read()) != ICharacterScanner.EOF) {
 				// Check for end of line since it can be used to terminate the pattern.
 				for (int i = 0; i < delimiters.length; i++) {
 					if (c == delimiters[i][0] && sequenceDetected(scanner, delimiters[i]))
 						return;
 				}
 			}
 		}

 		private void scanToBeginOfLine(ICharacterScanner scanner) {
 			for (; scanner.getColumn() != 0; scanner.unread());
 		}

 		private boolean sequenceDetected(ICharacterScanner scanner, char[] sequence) {
 			for (int i = 1; i < sequence.length; i++) {
 				int c = scanner.read();
 				if (c == ICharacterScanner.EOF) {
 					return true;
 				} else if (c != sequence[i]) {
 					// Non-matching character detected, rewind the scanner back to the start.
 					for (; i > 0; i--)
 						scanner.unread();
 					return false;
 				}
 			}

 			return true;
 		}
 		protected boolean isValidCharacter(int c) {
 			char c0 = (char) c;
 			return Character.isLetterOrDigit(c0) || (c0 == '_');
 		}

 	}

 }
	/**********************************************************************
	* Copyright (c) 2002,2003 QNX Software Systems and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* QNX Software Systems - Initial API and implementation
	***********************************************************************/
	package org.eclipse.cdt.make.internal.ui.text.makefile;

	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.jface.text.rules.EndOfLineRule;
	import org.eclipse.jface.text.rules.ICharacterScanner;
	import org.eclipse.jface.text.rules.IPredicateRule;
	import org.eclipse.jface.text.rules.IToken;
	import org.eclipse.jface.text.rules.MultiLineRule;
	import org.eclipse.jface.text.rules.RuleBasedPartitionScanner;
	import org.eclipse.jface.text.rules.Token;

	public class MakefilePartitionScanner extends RuleBasedPartitionScanner {
	// Partition types
	public final static String MAKEFILE_COMMENT = "makefile_comment"; //$NON-NLS-1$
	public final static String MAKEFILE_MACRO_ASSIGNEMENT = "makefile_macro_assignement"; //$NON-NLS-1$
	public final static String MAKEFILE_INCLUDE_BLOCK = "makefile_include_block"; //$NON-NLS-1$
	public final static String MAKEFILE_IF_BLOCK = "makefile_if_block"; //$NON-NLS-1$
	public final static String MAKEFILE_DEF_BLOCK = "makefile_def_block"; //$NON-NLS-1$
	public final static String MAKEFILE_OTHER = "makefile_other"; //$NON-NLS-1$

	public final static String[] TYPES =
	new String[] {
	MAKEFILE_COMMENT,
	MAKEFILE_MACRO_ASSIGNEMENT,
	MAKEFILE_INCLUDE_BLOCK,
	MAKEFILE_IF_BLOCK,
	MAKEFILE_DEF_BLOCK,
	MAKEFILE_OTHER,
	// All other
	};

	/** The predefined delimiters of this tracker */
	private char[][] fModDelimiters = { { '\r', '\n' }, {
	'\r' }, {
	'\n' }
	};

	/**
	* Constructor for MakefilePartitionScanner
	*/
	public MakefilePartitionScanner() {
	super();

	IToken tComment = new Token(MAKEFILE_COMMENT);
	IToken tMacro = new Token(MAKEFILE_MACRO_ASSIGNEMENT);
	IToken tInclude = new Token(MAKEFILE_INCLUDE_BLOCK);
	IToken tIf = new Token(MAKEFILE_IF_BLOCK);
	IToken tDef = new Token(MAKEFILE_DEF_BLOCK);
	IToken tOther = new Token(MAKEFILE_OTHER);

	List rules = new ArrayList();

	// Add rule for single line comments.

	rules.add(new EndOfLineRule("#", tComment, '\\')); //$NON-NLS-1$

	rules.add(new EndOfLineRule("include", tInclude)); //$NON-NLS-1$

	rules.add(new EndOfLineRule("export", tDef)); //$NON-NLS-1$
	rules.add(new EndOfLineRule("unexport", tDef)); //$NON-NLS-1$
	rules.add(new EndOfLineRule("vpath", tDef)); //$NON-NLS-1$
	rules.add(new EndOfLineRule("override", tDef)); //$NON-NLS-1$
	rules.add(new MultiLineRule("define", "endef", tDef)); //$NON-NLS-1$
	rules.add(new MultiLineRule("override define", "endef", tDef)); //$NON-NLS-1$

	// Add rules for multi-line comments and javadoc.
	rules.add(new MultiLineRule("ifdef", "endif", tIf)); //$NON-NLS-1$
	rules.add(new MultiLineRule("ifndef", "endif", tIf)); //$NON-NLS-1$
	rules.add(new MultiLineRule("ifeq", "endif", tIf)); //$NON-NLS-1$
	rules.add(new MultiLineRule("ifnneq", "endif", tIf)); //$NON-NLS-1$

	// Last rule must be supplied with default token!
	rules.add(new MacroRule(tMacro, tOther)); //$NON-NLS-1$

	IPredicateRule[] result = new IPredicateRule[rules.size()];
	rules.toArray(result);
	setPredicateRules(result);

	}

	/*
	* @see ICharacterScanner#getLegalLineDelimiters
	*/
	public char[][] getLegalLineDelimiters() {
	return fModDelimiters;
	}

	private class MacroRule implements IPredicateRule {
	private static final int INIT_STATE = 0;
	private static final int VAR_STATE = 1;
	private static final int END_VAR_STATE = 2;
	private static final int EQUAL_STATE = 3;
	private static final int FINISH_STATE = 4;
	private static final int ERROR_STATE = 5;

	private IToken token;
	private StringBuffer buffer = new StringBuffer();
	protected IToken defaultToken;
	public MacroRule(IToken token, IToken defaultToken) {
	this.token = token;
	this.defaultToken = defaultToken;
	}

	public IToken getSuccessToken() {
	return token;
	}

	public IToken evaluate(ICharacterScanner scanner, boolean resume) {
	buffer.setLength(0);
	int state = INIT_STATE;

	if (resume)
	scanToBeginOfLine(scanner);

	for (int c = scanner.read(); c != ICharacterScanner.EOF; c = scanner.read()) {
	switch (state) {
	case INIT_STATE :
	if (c != '\n' && Character.isWhitespace((char) c))
	break;
	if (isValidCharacter(c))
	state = VAR_STATE;
	else
	state = ERROR_STATE;
	break;
	case VAR_STATE :
	if (isValidCharacter(c))
	break;
	case END_VAR_STATE :
	if (c != '\n' && Character.isWhitespace((char) c))
	state = END_VAR_STATE;
	else if (c == ':' \|\| c == '+')
	state = EQUAL_STATE;
	else if (c == '=')
	state = FINISH_STATE;
	else {
	if (state == END_VAR_STATE)
	scanner.unread(); // Return back to the space
	state = ERROR_STATE;
	}
	break;
	case EQUAL_STATE :
	if (c == '=')
	state = FINISH_STATE;
	else
	state = ERROR_STATE;
	break;
	case FINISH_STATE :
	break;
	default :
	break;
	}
	if (state >= FINISH_STATE)
	break;
	buffer.append((char) c);
	}

	scanner.unread();

	if (state == FINISH_STATE) {
	scanToEndOfLine(scanner);
	return token;
	}

	if (defaultToken.isUndefined())
	unreadBuffer(scanner);

	return Token.UNDEFINED;

	}

	public IToken evaluate(ICharacterScanner scanner) {
	return evaluate(scanner, false);
	}

	/**
	* Returns the characters in the buffer to the scanner.
	*
	* @param scanner the scanner to be used
	*/
	protected void unreadBuffer(ICharacterScanner scanner) {
	for (int i = buffer.length() - 1; i >= 0; i--)
	scanner.unread();
	}

	private void scanToEndOfLine(ICharacterScanner scanner) {
	int c;
	char[][] delimiters = scanner.getLegalLineDelimiters();
	while ((c = scanner.read()) != ICharacterScanner.EOF) {
	// Check for end of line since it can be used to terminate the pattern.
	for (int i = 0; i < delimiters.length; i++) {
	if (c == delimiters[i][0] && sequenceDetected(scanner, delimiters[i]))
	return;
	}
	}
	}

	private void scanToBeginOfLine(ICharacterScanner scanner) {
	for (; scanner.getColumn() != 0; scanner.unread());
	}

	private boolean sequenceDetected(ICharacterScanner scanner, char[] sequence) {
	for (int i = 1; i < sequence.length; i++) {
	int c = scanner.read();
	if (c == ICharacterScanner.EOF) {
	return true;
	} else if (c != sequence[i]) {
	// Non-matching character detected, rewind the scanner back to the start.
	for (; i > 0; i--)
	scanner.unread();
	return false;
	}
	}

	return true;
	}
	protected boolean isValidCharacter(int c) {
	char c0 = (char) c;
	return Character.isLetterOrDigit(c0) \|\| (c0 == '_');
	}

	}

	}