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Add Get Bytes Method Generator for C#

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I updated idl_gen_general.cpp to add support for generating a Get Bytes
method for a vector to the generated C# source code. Given a byte vector
field named Foo, a method named GetFooBytes() will be generated in the
C# source code that will return an ArraySegment<byte> value referencing
the vector data in the underlying ByteBuffer.

I added a method to Table.cs named __vector_as_arraysegment that is used
by the code generated by the change to the C# generator.
__vector_as_arraysegment will take the offset of the vector and will
return the ArraySegment<byte> value corresponding to the bytes that
store the vector data.

I updated FlatBuffersExampleTests.cs to add tests to validate my
implementation of Table.__vector_as_arraysegment. I added tests to
demonstrate that the bytes for the monster's name can be extracted from
the underlying byte array. I also added tests to show that
Table.__vector_as_arraysegment returns a null value if the vector is not
present in the FlatBuffer.

I used the updated flatc.exe program to regenerate the C# source files
for the MyGame example. The new Monster class includes the GetXXXBytes
methods to return the byte arrays containing data for vectors.
This commit is contained in:
Michael Collins
2015-10-04 19:57:39 -07:00
parent fe2f8d32aa
commit e083e466b8
9 changed files with 70 additions and 12 deletions
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2
tests/MyGame/Example/Stat.cs
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@@ -3,6 +3,7 @@
namespace MyGame.Example
{
using System;
using FlatBuffers;
public sealed class Stat : Table {
@@ -11,6 +12,7 @@ public sealed class Stat : Table {
public Stat __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; return this; }
public string Id { get { int o = __offset(4); return o != 0 ? __string(o + bb_pos) : null; } }
public ArraySegment<byte>? GetIdBytes() { return __vector_as_arraysegment(4); }
public long Val { get { int o = __offset(6); return o != 0 ? bb.GetLong(o + bb_pos) : (long)0; } }
public bool MutateVal(long val) { int o = __offset(6); if (o != 0) { bb.PutLong(o + bb_pos, val); return true; } else { return false; } }
public ushort Count { get { int o = __offset(8); return o != 0 ? bb.GetUshort(o + bb_pos) : (ushort)0; } }