diff options
Diffstat (limited to 'mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/ByteBufferInputStream.java')
-rw-r--r-- | mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/ByteBufferInputStream.java | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/ByteBufferInputStream.java b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/ByteBufferInputStream.java new file mode 100644 index 000000000..bc9e0a143 --- /dev/null +++ b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/mozglue/ByteBufferInputStream.java @@ -0,0 +1,64 @@ +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*- + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +package org.mozilla.gecko.mozglue; + +import java.io.InputStream; +import java.nio.ByteBuffer; + +class ByteBufferInputStream extends InputStream { + + protected ByteBuffer mBuf; + // Reference to a native object holding the data backing the ByteBuffer. + private final NativeReference mNativeRef; + + protected ByteBufferInputStream(ByteBuffer buffer, NativeReference ref) { + mBuf = buffer; + mNativeRef = ref; + } + + @Override + public int available() { + return mBuf.remaining(); + } + + @Override + public void close() { + // Do nothing, we need to keep the native references around for child + // buffers. + } + + @Override + public int read() { + if (!mBuf.hasRemaining() || mNativeRef.isReleased()) { + return -1; + } + + return mBuf.get() & 0xff; // Avoid sign extension + } + + @Override + public int read(byte[] buffer, int offset, int length) { + if (!mBuf.hasRemaining() || mNativeRef.isReleased()) { + return -1; + } + + length = Math.min(length, mBuf.remaining()); + mBuf.get(buffer, offset, length); + return length; + } + + @Override + public long skip(long byteCount) { + if (byteCount < 0 || mNativeRef.isReleased()) { + return 0; + } + + byteCount = Math.min(byteCount, mBuf.remaining()); + mBuf.position(mBuf.position() + (int)byteCount); + return byteCount; + } + +} |