This commit was generated by cvs2svn to compensate for changes in r2, which

included commits to RCS files with non-trunk default branches.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@6 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

1 files changed, 131 insertions, 0 deletions

diff --git a/src/main/javassist/bytecode/LineNumberAttribute.java b/src/main/javassist/bytecode/LineNumberAttribute.java
new file mode 100644
index 00000000..35f1a020
--- /dev/null
+++ b/src/main/javassist/bytecode/LineNumberAttribute.java
@@ -0,0 +1,131 @@
+/*
+ * This file is part of the Javassist toolkit.
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * either http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Javassist.
+ *
+ * The Initial Developer of the Original Code is Shigeru Chiba.  Portions
+ * created by Shigeru Chiba are Copyright (C) 1999-2003 Shigeru Chiba.
+ * All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * The development of this software is supported in part by the PRESTO
+ * program (Sakigake Kenkyu 21) of Japan Science and Technology Corporation.
+ */
+
+package javassist.bytecode;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.util.Map;
+
+/**
+ * <code>LineNumberTablec_attribute</code>.
+ */
+public class LineNumberAttribute extends AttributeInfo {
+    /**
+     * The name of this attribute <code>"LineNumberTable"</code>.
+     */
+    public static final String tag = "LineNumberTable";
+
+    LineNumberAttribute(ConstPool cp, int n, DataInputStream in)
+	throws IOException
+    {
+	super(cp, n, in);
+    }
+
+    private LineNumberAttribute(ConstPool cp, byte[] i) {
+	super(cp, tag, i);
+    }
+
+    /**
+     * Returns <code>line_number_table_length</code>.
+     * This represents the number of entries in the table.
+     */
+    public int tableLength() {
+	return ByteArray.readU16bit(info, 0);
+    }
+
+    /**
+     * Returns <code>line_number_table[i].start_pc</code>.
+     * This represents the index into the code array at which the code
+     * for a new line in the original source file begins.
+     *
+     * @param i		the i-th entry.
+     */
+    public int startPc(int i) {
+	return ByteArray.readU16bit(info, i * 4 + 2);
+    }
+
+    /**
+     * Returns <code>line_number_table[i].line_number</code>.
+     * This represents the corresponding line number in the original
+     * source file.
+     *
+     * @param i		the i-th entry.
+     */
+    public int lineNumber(int i) {
+	return ByteArray.readU16bit(info, i * 4 + 4);
+    }
+
+    /**
+     * Returns the line number corresponding to the specified bytecode.
+     *
+     * @param pc	the index into the code array.
+     */
+    public int toLineNumber(int pc) {
+	int n = tableLength();
+	int i = 0;
+	for (; i < n; ++i)
+	    if (pc < startPc(i))
+		if (i == 0)
+		    return lineNumber(0);
+		else
+		    break;
+
+	return lineNumber(i - 1);
+    }
+
+    /**
+     * Returns the index into the code array at which the code for
+     * the specified line begins.
+     *
+     * @param line	the line number.
+     * @return		-1 if the specified line is not found.
+     */
+    public int toStartPc(int line) {
+	int n = tableLength();
+	for (int i = 0; i < n; ++i)
+	    if (line == lineNumber(i))
+		return startPc(i);
+
+	return -1;
+    }
+
+    /**
+     * Makes a copy.
+     *
+     * @param newCp	the constant pool table used by the new copy.
+     * @param classnames	should be null.
+     */
+    public AttributeInfo copy(ConstPool newCp, Map classnames) {
+	byte[] src = info;
+	int num = src.length;
+	byte[] dest = new byte[num];
+	for (int i = 0; i < num; ++i)
+	    dest[i] = src[i];
+
+	LineNumberAttribute attr = new LineNumberAttribute(newCp, dest);
+	return attr;
+    }
+}