1 files changed, 132 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/BaseNCodecInputStream.java b/mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/BaseNCodecInputStream.java
new file mode 100644
index 000000000..0aa879b15
--- /dev/null
+++ b/mobile/android/thirdparty/org/mozilla/apache/commons/codec/binary/BaseNCodecInputStream.java
@@ -0,0 +1,132 @@
+// Mozilla has modified this file - see http://hg.mozilla.org/ for details.
+/*
+ * 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.
+ */
+
+package org.mozilla.apache.commons.codec.binary;
+
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Abstract superclass for Base-N input streams.
+ * 
+ * @since 1.5
+ */
+public class BaseNCodecInputStream extends FilterInputStream {
+
+    private final boolean doEncode;
+
+    private final BaseNCodec baseNCodec;
+
+    private final byte[] singleByte = new byte[1];
+
+    protected BaseNCodecInputStream(InputStream in, BaseNCodec baseNCodec, boolean doEncode) {
+        super(in);
+        this.doEncode = doEncode;
+        this.baseNCodec = baseNCodec;
+    }
+
+    /**
+     * Reads one <code>byte</code> from this input stream.
+     * 
+     * @return the byte as an integer in the range 0 to 255. Returns -1 if EOF has been reached.
+     * @throws IOException
+     *             if an I/O error occurs.
+     */
+    public int read() throws IOException {
+        int r = read(singleByte, 0, 1);
+        while (r == 0) {
+            r = read(singleByte, 0, 1);
+        }
+        if (r > 0) {
+            return singleByte[0] < 0 ? 256 + singleByte[0] : singleByte[0];
+        }
+        return -1;
+    }
+
+    /**
+     * Attempts to read <code>len</code> bytes into the specified <code>b</code> array starting at <code>offset</code>
+     * from this InputStream.
+     * 
+     * @param b
+     *            destination byte array
+     * @param offset
+     *            where to start writing the bytes
+     * @param len
+     *            maximum number of bytes to read
+     * 
+     * @return number of bytes read
+     * @throws IOException
+     *             if an I/O error occurs.
+     * @throws NullPointerException
+     *             if the byte array parameter is null
+     * @throws IndexOutOfBoundsException
+     *             if offset, len or buffer size are invalid
+     */
+    public int read(byte b[], int offset, int len) throws IOException {
+        if (b == null) {
+            throw new NullPointerException();
+        } else if (offset < 0 || len < 0) {
+            throw new IndexOutOfBoundsException();
+        } else if (offset > b.length || offset + len > b.length) {
+            throw new IndexOutOfBoundsException();
+        } else if (len == 0) {
+            return 0;
+        } else {
+            int readLen = 0;
+            /*
+             Rationale for while-loop on (readLen == 0):
+             -----
+             Base32.readResults() usually returns > 0 or EOF (-1).  In the
+             rare case where it returns 0, we just keep trying.
+
+             This is essentially an undocumented contract for InputStream
+             implementors that want their code to work properly with
+             java.io.InputStreamReader, since the latter hates it when
+             InputStream.read(byte[]) returns a zero.  Unfortunately our
+             readResults() call must return 0 if a large amount of the data
+             being decoded was non-base32, so this while-loop enables proper
+             interop with InputStreamReader for that scenario.
+             -----
+             This is a fix for CODEC-101
+            */
+            while (readLen == 0) {
+                if (!baseNCodec.hasData()) {
+                    byte[] buf = new byte[doEncode ? 4096 : 8192];
+                    int c = in.read(buf);
+                    if (doEncode) {
+                        baseNCodec.encode(buf, 0, c);
+                    } else {
+                        baseNCodec.decode(buf, 0, c);
+                    }
+                }
+                readLen = baseNCodec.readResults(b, offset, len);
+            }
+            return readLen;
+        }
+    }
+    /**
+     * {@inheritDoc}
+     * 
+     * @return false
+     */
+    public boolean markSupported() {
+        return false; // not an easy job to support marks
+    }
+
+}