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+/*
+ * ProGuard -- shrinking, optimization, obfuscation, and preverification
+ * of Java bytecode.
+ *
+ * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
+ *
+ * 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; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package proguard.classfile.attribute;
+
+import proguard.classfile.*;
+import proguard.classfile.attribute.visitor.*;
+
+/**
+ * This Attribute represents a line number table attribute.
+ *
+ * @author Eric Lafortune
+ */
+public class LineNumberTableAttribute extends Attribute
+{
+ public int u2lineNumberTableLength;
+ public LineNumberInfo[] lineNumberTable;
+
+
+ /**
+ * Creates an uninitialized LineNumberTableAttribute.
+ */
+ public LineNumberTableAttribute()
+ {
+ }
+
+
+ /**
+ * Creates an initialized LineNumberTableAttribute.
+ */
+ public LineNumberTableAttribute(int u2attributeNameIndex,
+ int u2lineNumberTableLength,
+ LineNumberInfo[] lineNumberTable)
+ {
+ super(u2attributeNameIndex);
+
+ this.u2lineNumberTableLength = u2lineNumberTableLength;
+ this.lineNumberTable = lineNumberTable;
+ }
+
+
+ /**
+ * Returns the line number corresponding to the given byte code program
+ * counter.
+ */
+ public int getLineNumber(int pc)
+ {
+ for (int index = u2lineNumberTableLength-1 ; index >= 0 ; index--)
+ {
+ LineNumberInfo info = lineNumberTable[index];
+ if (pc >= info.u2startPC)
+ {
+ return info.u2lineNumber;
+ }
+ }
+
+ return u2lineNumberTableLength > 0 ?
+ lineNumberTable[0].u2lineNumber :
+ 0;
+ }
+
+
+ // Implementations for Attribute.
+
+ public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, AttributeVisitor attributeVisitor)
+ {
+ attributeVisitor.visitLineNumberTableAttribute(clazz, method, codeAttribute, this);
+ }
+
+
+ /**
+ * Applies the given visitor to all line numbers.
+ */
+ public void lineNumbersAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfoVisitor lineNumberInfoVisitor)
+ {
+ for (int index = 0; index < u2lineNumberTableLength; index++)
+ {
+ // We don't need double dispatching here, since there is only one
+ // type of LineNumberInfo.
+ lineNumberInfoVisitor.visitLineNumberInfo(clazz, method, codeAttribute, lineNumberTable[index]);
+ }
+ }
+}