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imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
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1 files changed, 297 insertions, 0 deletions

diff --git a/libjava/classpath/javax/swing/text/Segment.java b/libjava/classpath/javax/swing/text/Segment.java
new file mode 100644
index 000000000..7486ab338
--- /dev/null
+++ b/libjava/classpath/javax/swing/text/Segment.java
@@ -0,0 +1,297 @@
+/* Segment.java --
+   Copyright (C) 2002, 2004, 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package javax.swing.text;
+
+import java.text.CharacterIterator;
+
+/**
+ * A text fragment represented by a sequence of characters stored in an array.
+ */
+public class Segment implements Cloneable, CharacterIterator
+{
+  private boolean partialReturn;
+
+  /** The current index. */
+  private int current;
+
+  /** Storage for the characters (may contain additional characters). */
+  public char[] array;
+
+  /** The number of characters in the segment. */
+  public int count;
+
+  /** The offset of the first character in the segment. */
+  public int offset;
+
+  /**
+   * Creates a new <code>Segment</code>.
+   */
+  public Segment()
+  {
+    // Nothing to do here.
+  }
+
+  /**
+   * Creates a new <code>Segment</code>.
+   *
+   * @param array  the underlying character data.
+   * @param offset  the offset of the first character in the segment.
+   * @param count  the number of characters in the segment.
+   */
+  public Segment(char[] array, int offset, int count)
+  {
+    this.array = array;
+    this.offset = offset;
+    this.count = count;
+  }
+
+  /**
+   * Clones the segment (note that the underlying character array is not cloned,
+   * just the reference to it).
+   *
+   * @return A clone of the segment.
+   */
+  public Object clone()
+  {
+    try
+      {
+        return super.clone();
+      }
+    catch (CloneNotSupportedException e)
+      {
+        return null;
+      }
+  }
+
+  /**
+   * Returns the character at the current index.  If the segment consists of
+   * zero characters, or the current index has passed the end of the
+   * characters in the segment, this method returns {@link #DONE}.
+   *
+   * @return The character at the current index.
+   */
+  public char current()
+  {
+    if (count == 0
+        || current >= getEndIndex())
+      return DONE;
+
+    return array[current];
+  }
+
+  /**
+   * Sets the current index to the first character in the segment and returns
+   * that character.  If the segment contains zero characters, this method
+   * returns {@link #DONE}.
+   *
+   * @return The first character in the segment, or {@link #DONE} if the
+   *         segment contains zero characters.
+   */
+  public char first()
+  {
+    if (count == 0)
+      return DONE;
+
+    current = getBeginIndex();
+    return array[current];
+  }
+
+  /**
+   * Returns the index of the first character in the segment.
+   *
+   * @return The index of the first character.
+   */
+  public int getBeginIndex()
+  {
+    return offset;
+  }
+
+  /**
+   * Returns the end index for the segment (one position beyond the last
+   * character in the segment - note that this can be outside the range of the
+   * underlying character array).
+   *
+   * @return The end index for the segment.
+   */
+  public int getEndIndex()
+  {
+    return offset + count;
+  }
+
+  /**
+   * Returns the index of the current character in the segment.
+   *
+   * @return The index of the current character.
+   */
+  public int getIndex()
+  {
+    return current;
+  }
+
+  /**
+   * Sets the current index to point to the last character in the segment and
+   * returns that character.  If the segment contains zero characters, the
+   * current index is set to {@link #getEndIndex()} and this method returns
+   * {@link #DONE}.
+   *
+   * @return The last character in the segment, or {@link #DONE} if the
+   *         segment contains zero characters.
+   */
+  public char last()
+  {
+    if (count == 0)
+      {
+        current = getEndIndex();
+        return DONE;
+      }
+
+    current = getEndIndex() - 1;
+    return array[current];
+  }
+
+  /**
+   * Sets the current index to point to the next character in the segment and
+   * returns that character.  If the next character position is past the end of
+   * the segment, the index is set to {@link #getEndIndex()} and the method
+   * returns {@link #DONE}.  If the segment contains zero characters, this
+   * method returns {@link #DONE}.
+   *
+   * @return The next character in the segment or {@link #DONE} (if the next
+   *         character position is past the end of the segment or if the
+   *         segment contains zero characters).
+   */
+  public char next()
+  {
+    if (count == 0)
+      return DONE;
+
+    if ((current + 1) >= getEndIndex())
+      {
+        current = getEndIndex();
+        return DONE;
+      }
+
+    current++;
+    return array[current];
+  }
+
+  /**
+   * Sets the current index to point to the previous character in the segment
+   * and returns that character.  If the current index is equal to
+   * {@link #getBeginIndex()}, or if the segment contains zero characters, this
+   * method returns {@link #DONE}.
+   *
+   * @return The previous character in the segment or {@link #DONE} (if the
+   *         current character position is at the beginning of the segment or
+   *         if the segment contains zero characters).
+   */
+  public char previous()
+  {
+    if (count == 0
+        || current == getBeginIndex())
+      return DONE;
+
+    current--;
+    return array[current];
+  }
+
+  /**
+   * Sets the current index and returns the character at that position (or
+   * {@link #DONE} if the index is equal to {@link #getEndIndex()}.
+   *
+   * @param position  the current position.
+   *
+   * @return The character at the specified <code>position</code>, or
+   *         {@link #DONE} if <code>position</code> is equal to
+   *         {@link #getEndIndex()}.
+   *
+   * @throws IllegalArgumentException if <code>position</code> is not in the
+   *         range {@link #getBeginIndex()} to {@link #getEndIndex()}.
+   */
+  public char setIndex(int position)
+  {
+    if (position < getBeginIndex()
+        || position > getEndIndex())
+      throw new IllegalArgumentException("position: " + position
+                                         + ", beginIndex: " + getBeginIndex()
+                                         + ", endIndex: " + getEndIndex()
+                                         + ", text: " + toString());
+
+    current = position;
+
+    if (position == getEndIndex())
+      return DONE;
+
+    return array[current];
+  }
+
+  /**
+   * Returns a <code>String</code> containing the same characters as this
+   * <code>Segment</code>.
+   *
+   * @return A <code>String</code> containing the same characters as this
+   *         <code>Segment</code>.
+   */
+  public String toString()
+  {
+    return (array != null) ? new String(array, offset, count) : "";
+  }
+
+  /**
+   * Sets the partial return flag.
+   *
+   * @param p  the new value of the flag.
+   *
+   * @since 1.4
+   */
+  public void setPartialReturn(boolean p)
+  {
+    partialReturn = p;
+  }
+
+  /**
+   * Returns the partial return flag.
+   *
+   * @return The partial return flag.
+   * @since 1.4
+   */
+  public boolean isPartialReturn()
+  {
+    return partialReturn;
+  }
+}