Change directory structure.

[dvibrowser/dvi2epub.git] / src / main / java / jp / sourceforge / dvibrowser / dvicore / cmd / DviBop.java

diff --git a/src/main/java/jp/sourceforge/dvibrowser/dvicore/cmd/DviBop.java b/src/main/java/jp/sourceforge/dvibrowser/dvicore/cmd/DviBop.java
new file mode 100644 (file)
index 0000000..2f37076
--- /dev/null
+++ b/src/main/java/jp/sourceforge/dvibrowser/dvicore/cmd/DviBop.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2009, Takeyuki Nagao
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the
+ * following conditions are met:
+ * 
+ *  * Redistributions of source code must retain the above
+ *    copyright notice, this list of conditions and the
+ *    following disclaimer.
+ *  * Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the
+ *    following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ *    
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ */
+
+package jp.sourceforge.dvibrowser.dvicore.cmd;
+
+/**
+ * An immutable class to represent the BOP (Begin Of Page) command.
+ * This class is used internally to parse the DVI data.
+ * @author Takeyuki NAGAO (nagaotakeyuki@gmail.com)
+ */
+
+public class DviBop
+implements java.io.Serializable
+{
+  private static final long serialVersionUID = 1326126283946043078L;
+  
+  private final int count[];
+  private final int backPointer;
+
+  public DviBop(int [] count, int backPointer) {
+    this.count = count.clone(); // a defensive copy
+    this.backPointer = backPointer;
+    checkValues();
+  }
+
+  public void checkValues() {
+    if (count.length != 10)
+      throw new IllegalArgumentException
+        ("count must be of type int [10].");
+  }
+
+  public String countAsString() {
+    int i, j;
+
+    StringBuilder sb = new StringBuilder();
+    sb.append(String.valueOf(count[0]));
+    for (i=count.length-1; i>0; i--) 
+      if (count[i] != 0) break;
+    for (j=1; j<=i; j++)
+      sb.append(":" + count[j]);
+    
+    return sb.toString();
+  }
+
+  public int [] count() { return count.clone(); }
+  public int backPointer() { return backPointer; }
+
+  public String toString() {
+    return getClass().getName() + "[count=" + countAsString() +
+           ",backPointer=" + backPointer + "]";
+  }
+
+  public boolean equals(Object o) {
+    if (o instanceof DviBop) {
+      DviBop a = (DviBop) o;
+      if (!(a.backPointer == backPointer
+          && a.count.length == count.length
+          && count.length == 10))
+        return false;
+
+      for (int i=0; i<10; i++)
+        if (a.count[i] != count[i])
+          return false;
+
+      return true;
+    }
+    return false;
+  }
+
+  public int hashCode() {
+    int hash = backPointer;
+    for (int a : count)
+      hash = a + 33 * hash;
+    return hash;
+  }
+}