forked from BigfootDev/flatbuffers
08cf50c54a
* initial changes to support size prefixed buffers in Java * add slice equivalent to CSharp ByteBuffer * resolve TODO for slicing in CSharp code generation * add newly generated Java and CSharp test sources * fix typo in comment * add FinishSizePrefixed methods to CSharp FlatBufferBuilder as well * add option to allow writing the prefix as well * generate size-prefixed monster binary as well * extend JavaTest to test the size prefixed binary as well * use constants for size prefix length * fuse common code for getRootAs and getSizePrefixedRootAs * pulled file identifier out of if * add FinishSizePrefixed, GetSizePrefixedRootAs support for Python * Revert "extend JavaTest to test the size prefixed binary as well" This reverts commit68be4420dd. * Revert "generate size-prefixed monster binary as well" This reverts commit2939516fdf. * fix ByteBuffer.cs Slice() method; add proper CSharp and Java tests * fix unused parameter * increment version number * pulled out generated methods into separate utility class * pulled out generated methods into separate utility class for Python * fix indentation * remove unnecessary comment * fix newline and copyright * add ByteBufferUtil to csproj compilation * hide ByteBuffer's internal data; track offset into parent's array * test unsafe versions as well; compile and run in debug mode * clarify help text for size prefix * move ByteBuffer slicing behavior to subclass * fix protection levels * add size prefix support for text generation * add ByteBufferSlice to csproj compilation * revert size prefix handling for nested buffers * use duplicate instead of slice for removing size prefix * remove slice subclass and use duplicate for removing size prefix * remove slice specific tests * remove superfluous command line option
59 lines
1.6 KiB
Java
59 lines
1.6 KiB
Java
/*
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* Copyright 2017 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.flatbuffers;
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import static com.google.flatbuffers.Constants.*;
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import java.nio.ByteBuffer;
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/// @file
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/// @addtogroup flatbuffers_java_api
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/// @{
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/**
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* Class that collects utility functions around `ByteBuffer`.
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*/
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public class ByteBufferUtil {
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/**
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* Extract the size prefix from a `ByteBuffer`.
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*
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* @param bb a size-prefixed buffer
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* @return the size prefix
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*/
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public static int getSizePrefix(ByteBuffer bb) {
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return bb.getInt(bb.position());
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}
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/**
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* Create a duplicate of a size-prefixed `ByteBuffer` that has its position
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* advanced just past the size prefix.
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*
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* @param bb a size-prefixed buffer
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* @return a new buffer on the same underlying data that has skipped the
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* size prefix
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*/
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public static ByteBuffer removeSizePrefix(ByteBuffer bb) {
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ByteBuffer s = bb.duplicate();
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s.position(s.position() + SIZE_PREFIX_LENGTH);
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return s;
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}
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}
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/// @}
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