1 files changed, 264 insertions, 0 deletions
diff --git a/src/org/apache/http/util/CharArrayBuffer.java b/src/org/apache/http/util/CharArrayBuffer.java
new file mode 100644
index 0000000..b89f5d1
--- /dev/null
+++ b/src/org/apache/http/util/CharArrayBuffer.java
@@ -0,0 +1,264 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/util/CharArrayBuffer.java $
+ * $Revision: 496070 $
+ * $Date: 2007-01-14 04:18:34 -0800 (Sun, 14 Jan 2007) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.util;
+
+import org.apache.http.protocol.HTTP;
+
+/**
+ * A resizable char array.
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ * 
+ * @version $Revision: 496070 $
+ * 
+ * @since 4.0
+ */
+public final class CharArrayBuffer  {
+    
+    private char[] buffer;
+    private int len;
+
+    public CharArrayBuffer(int capacity) {
+        super();
+        if (capacity < 0) {
+            throw new IllegalArgumentException("Buffer capacity may not be negative");
+        }
+        this.buffer = new char[capacity]; 
+    }
+
+    private void expand(int newlen) {
+        char newbuffer[] = new char[Math.max(this.buffer.length << 1, newlen)];
+        System.arraycopy(this.buffer, 0, newbuffer, 0, this.len);
+        this.buffer = newbuffer;
+    }
+    
+    public void append(final char[] b, int off, int len) {
+        if (b == null) {
+            return;
+        }
+        if ((off < 0) || (off > b.length) || (len < 0) ||
+                ((off + len) < 0) || ((off + len) > b.length)) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (len == 0) {
+            return;
+        }
+        int newlen = this.len + len;
+        if (newlen > this.buffer.length) {
+            expand(newlen);
+        }
+        System.arraycopy(b, off, this.buffer, this.len, len);
+        this.len = newlen;
+    }
+    
+    public void append(String str) {
+        if (str == null) {
+            str = "null";
+        }
+        int strlen = str.length();
+        int newlen = this.len + strlen;
+        if (newlen > this.buffer.length) {
+            expand(newlen);
+        }
+        str.getChars(0, strlen, this.buffer, this.len);
+        this.len = newlen;
+    }
+
+    public void append(final CharArrayBuffer b, int off, int len) {
+        if (b == null) {
+            return;
+        }
+        append(b.buffer, off, len);
+    }
+        
+    public void append(final CharArrayBuffer b) {
+        if (b == null) {
+            return;
+        }
+        append(b.buffer,0, b.len);
+    }
+        
+    public void append(char ch) {
+        int newlen = this.len + 1;
+        if (newlen > this.buffer.length) {
+            expand(newlen);
+        }
+        this.buffer[this.len] = ch;
+        this.len = newlen;
+    }
+
+    public void append(final byte[] b, int off, int len) {
+        if (b == null) {
+            return;
+        }
+        if ((off < 0) || (off > b.length) || (len < 0) ||
+                ((off + len) < 0) || ((off + len) > b.length)) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (len == 0) {
+            return;
+        }
+        int oldlen = this.len;
+        int newlen = oldlen + len;
+        if (newlen > this.buffer.length) {
+            expand(newlen);
+        }
+        for (int i1 = off, i2 = oldlen; i2 < newlen; i1++, i2++) {
+            int ch = b[i1]; 
+            if (ch < 0) {
+                ch = 256 + ch;
+            }
+            this.buffer[i2] = (char) ch;
+        }
+        this.len = newlen;
+    }
+    
+    public void append(final ByteArrayBuffer b, int off, int len) {
+        if (b == null) {
+            return;
+        }
+        append(b.buffer(), off, len);
+    }
+    
+    public void append(final Object obj) {
+        append(String.valueOf(obj));
+    }
+    
+    public void clear() {
+        this.len = 0;
+    }
+    
+    public char[] toCharArray() {
+        char[] b = new char[this.len]; 
+        if (this.len > 0) {
+            System.arraycopy(this.buffer, 0, b, 0, this.len);
+        }
+        return b;
+    }
+    
+    public char charAt(int i) {
+        return this.buffer[i];
+    }
+    
+    public char[] buffer() {
+        return this.buffer;
+    }
+    
+    public int capacity() {
+        return this.buffer.length;
+    }
+    
+    public int length() {
+        return this.len;
+    }
+
+    public void ensureCapacity(int required) {
+        int available = this.buffer.length - this.len;
+        if (required > available) {
+            expand(this.len + required);
+        }
+    }
+    
+    public void setLength(int len) {
+        if (len < 0 || len > this.buffer.length) {
+            throw new IndexOutOfBoundsException();
+        }
+        this.len = len;
+    }
+    
+    public boolean isEmpty() {
+        return this.len == 0; 
+    }
+    
+    public boolean isFull() {
+        return this.len == this.buffer.length; 
+    }
+    
+    public int indexOf(int ch, int beginIndex, int endIndex) {
+        if (beginIndex < 0) {
+            beginIndex = 0;
+        }
+        if (endIndex > this.len) {
+            endIndex = this.len;
+        }
+        if (beginIndex > endIndex) {
+            return -1;
+        }
+        for (int i = beginIndex; i < endIndex; i++) {
+            if (this.buffer[i] == ch) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    
+    public int indexOf(int ch) {
+        return indexOf(ch, 0, this.len);
+    }
+
+    public String substring(int beginIndex, int endIndex) {
+        if (beginIndex < 0) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (endIndex > this.len) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (beginIndex > endIndex) {
+            throw new IndexOutOfBoundsException();
+        }
+        return new String(this.buffer, beginIndex, endIndex - beginIndex);
+    }
+    
+    public String substringTrimmed(int beginIndex, int endIndex) {
+        if (beginIndex < 0) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (endIndex > this.len) {
+            throw new IndexOutOfBoundsException();
+        }
+        if (beginIndex > endIndex) {
+            throw new IndexOutOfBoundsException();
+        }
+        while (beginIndex < endIndex && HTTP.isWhitespace(this.buffer[beginIndex])) {
+            beginIndex++;
+        }
+        while (endIndex > beginIndex && HTTP.isWhitespace(this.buffer[endIndex - 1])) {
+            endIndex--;
+        }
+        return new String(this.buffer, beginIndex, endIndex - beginIndex);
+    }
+    
+    public String toString() {
+        return new String(this.buffer, 0, this.len);
+    }
+    
+}