From d5e47f6da5b08b13ecdfa7f1edc7e12aeb83fab9 Mon Sep 17 00:00:00 2001
From: Eric Erfanian <erfanian@google.com>
Date: Wed, 15 Mar 2017 14:41:07 -0700
Subject: Update Dialer source from latest green build.

* Refactor voicemail component
* Add new enriched calling components

Test: treehugger, manual aosp testing

Change-Id: I521a0f86327d4b42e14d93927c7d613044ed5942
---
 .../voicemail/impl/mail/PeekableInputStream.java   | 81 ++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 java/com/android/voicemail/impl/mail/PeekableInputStream.java

(limited to 'java/com/android/voicemail/impl/mail/PeekableInputStream.java')

diff --git a/java/com/android/voicemail/impl/mail/PeekableInputStream.java b/java/com/android/voicemail/impl/mail/PeekableInputStream.java
new file mode 100644
index 000000000..08f867f82
--- /dev/null
+++ b/java/com/android/voicemail/impl/mail/PeekableInputStream.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed 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 com.android.voicemail.impl.mail;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * A filtering InputStream that allows single byte "peeks" without consuming the byte. The client of
+ * this stream can call peek() to see the next available byte in the stream and a subsequent read
+ * will still return the peeked byte.
+ */
+public class PeekableInputStream extends InputStream {
+  private final InputStream mIn;
+  private boolean mPeeked;
+  private int mPeekedByte;
+
+  public PeekableInputStream(InputStream in) {
+    this.mIn = in;
+  }
+
+  @Override
+  public int read() throws IOException {
+    if (!mPeeked) {
+      return mIn.read();
+    } else {
+      mPeeked = false;
+      return mPeekedByte;
+    }
+  }
+
+  public int peek() throws IOException {
+    if (!mPeeked) {
+      mPeekedByte = read();
+      mPeeked = true;
+    }
+    return mPeekedByte;
+  }
+
+  @Override
+  public int read(byte[] b, int offset, int length) throws IOException {
+    if (!mPeeked) {
+      return mIn.read(b, offset, length);
+    } else {
+      b[0] = (byte) mPeekedByte;
+      mPeeked = false;
+      int r = mIn.read(b, offset + 1, length - 1);
+      if (r == -1) {
+        return 1;
+      } else {
+        return r + 1;
+      }
+    }
+  }
+
+  @Override
+  public int read(byte[] b) throws IOException {
+    return read(b, 0, b.length);
+  }
+
+  @Override
+  public String toString() {
+    return String.format(
+        "PeekableInputStream(in=%s, peeked=%b, peekedByte=%d)",
+        mIn.toString(), mPeeked, mPeekedByte);
+  }
+}
-- 
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