/*******************************************************************************
* Copyright (c) 2000, 2006 QNX Software Systems and others.
* 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:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.make.internal.core.makefile;
/**
* Utility methods.
*/
public class Util {
private Util() {
}
public static boolean isCommand(String line) {
return line.length() > 1 && line.startsWith("\t"); //$NON-NLS-1$
}
public static boolean isEscapedLine(String line) {
return (line.endsWith("\\") && !line.endsWith("\\\\")); //$NON-NLS-1$ //$NON-NLS-2$
}
public static boolean isEmptyLine(String line) {
return line.trim().length() == 0;
}
public static int indexOfComment(String line) {
boolean escaped = false;
for (int i = 0; i < line.length(); i++) {
if (line.charAt(i) == '#' && !escaped) {
return i;
}
escaped = line.charAt(i) == '\\';
}
return -1;
}
public static boolean isSpace(char c) {
return (c == ' ' || c == '\t' || c == '\r' || c == '\n');
}
public static int indexOf(String line, char c) {
return indexOf(line, new Character(c).toString());
}
/**
* Special indexOf() method that makes sure that what we are searching
* is not between parentheses and brackets like a macro $(foo) ${bar}
*/
public static int indexOf(String line, String tokens) {
int paren = 0;
int bracket = 0;
char prev = 0;
char pprev = 0;
for (int i = 0; i < line.length(); i++) {
char ch = line.charAt(i);
if (ch == '(' && prev == '$' && pprev != '\\') {
paren++;
} else if (ch == '{' && prev == '$' && pprev != '\\') {
bracket++;
} else if (ch == ')' && prev != '\\') {
if (paren > 0) {
paren--;
}
} else if (ch == '}' && prev != '\\') {
if (bracket > 0) {
bracket--;
}
} else if (tokens.indexOf(ch) != -1) {
if (paren == 0 && bracket == 0) {
return i;
}
}
pprev = prev;
prev = ch;
}
return -1;
}
}