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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/gnu/gcj/runtime/StringBuffer.java
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+// This is a simplified copy of java.lang.StringBuffer with
+// `synchronized' removed.
+
+/* StringBuffer.java -- Growable strings
+ Copyright (C) 1998, 1999, 2000, 2001 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 gnu.gcj.runtime;
+
+public final class StringBuffer
+{
+ /** Append the <code>String</code> value of the argument to this <code>StringBuffer</code>.
+ * Uses <code>String.valueOf()</code> to convert to
+ * <code>String</code>.
+ * @param bool the <code>boolean</code> to convert and append.
+ * @return this <code>StringBuffer</code>.
+ * @see java.lang.String#valueOf(boolean)
+ */
+ public StringBuffer append (boolean bool)
+ {
+ return append (bool ? "true" : "false");
+ }
+
+ /** Append the <code>char</code> to this <code>StringBuffer</code>.
+ * @param c the <code>char</code> to append.
+ * @return this <code>StringBuffer</code>.
+ */
+ public StringBuffer append (char ch)
+ {
+ ensureCapacity_unsynchronized (count + 1);
+ value[count++] = ch;
+ return this;
+ }
+
+ /** Append the <code>String</code> value of the argument to this <code>StringBuffer</code>.
+ * Uses <code>String.valueOf()</code> to convert to
+ * <code>String</code>.
+ * @param inum the <code>int</code> to convert and append.
+ * @return this <code>StringBuffer</code>.
+ * @see java.lang.String#valueOf(int)
+ */
+ public native StringBuffer append (int inum);
+
+ /** Append the <code>String</code> value of the argument to this <code>StringBuffer</code>.
+ * Uses <code>String.valueOf()</code> to convert to
+ * <code>String</code>.
+ * @param lnum the <code>long</code> to convert and append.
+ * @return this <code>StringBuffer</code>.
+ * @see java.lang.String#valueOf(long)
+ */
+ public StringBuffer append (long lnum)
+ {
+ return append (Long.toString (lnum));
+ }
+
+ /** Append the <code>String</code> value of the argument to this <code>StringBuffer</code>.
+ * Uses <code>String.valueOf()</code> to convert to
+ * <code>String</code>.
+ * @param fnum the <code>float</code> to convert and append.
+ * @return this <code>StringBuffer</code>.
+ * @see java.lang.String#valueOf(float)
+ */
+ public StringBuffer append (float fnum)
+ {
+ return append (Float.toString (fnum));
+ }
+
+ /** Append the <code>String</code> value of the argument to this <code>StringBuffer</code>.
+ * Uses <code>String.valueOf()</code> to convert to
+ * <code>String</code>.
+ * @param dnum the <code>double</code> to convert and append.
+ * @return this <code>StringBuffer</code>.
+ * @see java.lang.String#valueOf(double)
+ */
+ public StringBuffer append (double dnum)
+ {
+ return append (Double.toString (dnum));
+ }
+
+ /** Append the <code>String</code> value of the argument to this <code>StringBuffer</code>.
+ * Uses <code>String.valueOf()</code> to convert to
+ * <code>String</code>.
+ * @param obj the <code>Object</code> to convert and append.
+ * @return this <code>StringBuffer</code>.
+ * @see java.lang.String#valueOf(java.lang.Object)
+ */
+ public StringBuffer append (Object obj)
+ {
+ return append (String.valueOf(obj));
+ }
+
+ /** Append the <code>String</code> to this <code>StringBuffer</code>.
+ * @param str the <code>String</code> to append.
+ * @return this <code>StringBuffer</code>.
+ */
+ public StringBuffer append (String str)
+ {
+ if (str == null)
+ str = "null";
+ int len = str.length();
+ ensureCapacity_unsynchronized (count + len);
+ str.getChars(0, len, value, count);
+ count += len;
+ return this;
+ }
+
+ private void ensureCapacity_unsynchronized (int minimumCapacity)
+ {
+ if (minimumCapacity > value.length)
+ {
+ minimumCapacity = Math.max (minimumCapacity, value.length * 2 + 2);
+ char[] nb = new char[minimumCapacity];
+ System.arraycopy(value, 0, nb, 0, count);
+ value = nb;
+ }
+ }
+
+ /** Create a new StringBuffer with default capacity 16.
+ * @see JLS 20.13.1
+ */
+ public StringBuffer ()
+ {
+ this (DEFAULT_CAPACITY);
+ }
+
+ /** Create an empty <code>StringBuffer</code> with the specified initial capacity.
+ * @param capacity the initial capacity.
+ */
+ public StringBuffer (int capacity)
+ {
+ count = 0;
+ value = new char[capacity];
+ }
+
+ /** Create a new <code>StringBuffer</code> with the characters in the specified <code>String</code>.
+ * Initial capacity will be the size of the String plus 16.
+ * @param str the <code>String</code> to make a <code>StringBuffer</code> out of.
+ */
+ public StringBuffer (String str)
+ {
+ if (str == null)
+ str = "null";
+ count = str.length();
+ // JLS: The initial capacity of the string buffer is 16 plus the
+ // length of the argument string.
+ value = new char[count + DEFAULT_CAPACITY];
+ str.getChars(0, count, value, 0);
+ }
+
+ /** Convert this <code>StringBuffer</code> to a <code>String</code>.
+ * @return the characters in this StringBuffer
+ */
+ // This is native because efficient implementation requires avoiding
+ // the Java protection mechanism.
+ public native String toString ();
+
+ // Index of next available character. Note that this has
+ // permissions set this way so that String can get the value.
+ int count;
+
+ // The buffer. Note that this has permissions set this way so that
+ // String can get the value.
+ char[] value;
+
+ private final static int DEFAULT_CAPACITY = 16; // JLS 20.13.1
+}