public static async Task Read(RosBagReader reader, RosBagNodeType nodeType)
{
bool read = await reader.ReadAsync().ConfigureAwait(false);
Assert.IsTrue(read, "Unexpected end of stream");
Assert.AreEqual(nodeType, reader.NodeType);
}
public async Task IntegrationTest()
{
using var stream = Assembly.GetExecutingAssembly()
.GetManifestResourceStream(typeof(ReadingTests), name: "testdata.dataset.bag");
using var reader = new RosBagReader(stream);
Assert.IsTrue(await reader.ReadAsync().ConfigureAwait(false));
Assert.AreEqual("#ROSBAG V2.0", reader.Text);
uint expectedBytes = 69;
Assert.IsTrue(await reader.ReadAsync().ConfigureAwait(false));
Assert.AreEqual(RosBagNodeType.RecordHeader, reader.NodeType);
Assert.AreEqual(expectedBytes, reader.RemainingEntryBytes);
await ReaderAssert.HeaderFieldName(reader, "chunk_count").ConfigureAwait(false);
await ReaderAssert.HeaderFieldValue <uint>(reader, 5, ToUInt32).ConfigureAwait(false);
expectedBytes -= FieldSize("chunk_count", 4);
await ReaderAssert.HeaderFieldName(reader, "conn_count").ConfigureAwait(false);
await ReaderAssert.HeaderFieldValue <uint>(reader, 2, ToUInt32).ConfigureAwait(false);
expectedBytes -= FieldSize("conn_count", 4);
reader.Close();
}
public static async Task HeaderFieldValue <T>(RosBagReader reader, T expectedValue, Func <byte[], T> decoder)
{
await HeaderFieldValue(reader).ConfigureAwait(false);
var decoded = decoder(reader.Bytes.ToArray());
Assert.AreEqual(expectedValue, decoded);
}
public static async Task HeaderFieldName(RosBagReader reader, string expectedName = null)
{
await reader.ReadAsync().ConfigureAwait(false);
Assert.AreEqual(RosBagNodeType.HeaderFieldName, reader.NodeType);
if (expectedName != null)
{
Assert.AreEqual(expectedName, reader.Text);
}
}
public static async Task RecordHeader(RosBagReader reader, uint?expectedBytes = null)
{
bool result = await reader.ReadAsync().ConfigureAwait(false);
Assert.IsTrue(result, "Unexpected end of stream");
Assert.AreEqual(RosBagNodeType.RecordHeader, reader.NodeType);
if (expectedBytes != null)
{
Assert.AreEqual(expectedBytes, reader.RemainingEntryBytes);
}
}
public static async Task <int> RecordData(RosBagReader reader, int?expectedBytes = null)
{
await Read(reader, RosBagNodeType.RecordDataHeader).ConfigureAwait(false);
await Read(reader, RosBagNodeType.RecordData).ConfigureAwait(false);
if (expectedBytes != null)
{
Assert.AreEqual(expectedBytes, reader.Bytes.Length);
}
return(reader.Bytes.Length);
}
public static async ValueTask <RosBagHeader> ReadBagHeader(this RosBagReader reader, CancellationToken cancellation = default)
{
if (reader is null)
{
throw new ArgumentNullException(nameof(reader));
}
if (!await reader.ReadRecord(cancellation).ConfigureAwait(false))
{
throw new RosBagException(RosBagReader.EndOfStream);
}
if (reader.NodeType != RosBagNodeType.RecordHeader)
{
throw new RosBagException(HeaderMissing);
}
ulong firstRecordOffset = 0;
uint connectionCount = 0;
uint chunkCount = 0;
var fields = RosBagHeader.Fields.None;
while (fields != RosBagHeader.Fields.All)
{
if (!await reader.ReadAsync(cancellation).ConfigureAwait(false))
{
throw new RosBagException(RosBagReader.EndOfStream);
}
if (reader.NodeType != RosBagNodeType.HeaderFieldName)
{
throw new RosBagException(RequiredFieldMissing);
}
switch (reader.Text)
{
case "index_pos":
if (fields.HasFlag(RosBagHeader.Fields.FirstRecordOffset))
{
throw new RosBagException(RosBagReader.DuplicateField);
}
firstRecordOffset = await reader.ReadUInt64(cancellation).ConfigureAwait(false);
fields |= RosBagHeader.Fields.FirstRecordOffset;
break;
case "conn_count":
if (fields.HasFlag(RosBagHeader.Fields.ConnectionCount))
{
throw new RosBagException(RosBagReader.DuplicateField);
}
connectionCount = await reader.ReadUInt32(cancellation).ConfigureAwait(false);
fields |= RosBagHeader.Fields.ConnectionCount;
break;
case "chunk_count":
if (fields.HasFlag(RosBagHeader.Fields.ChunkCount))
{
throw new RosBagException(RosBagReader.DuplicateField);
}
chunkCount = await reader.ReadUInt32(cancellation).ConfigureAwait(false);
fields |= RosBagHeader.Fields.ChunkCount;
break;
case "op":
if (!await reader.ReadAsync(cancellation).ConfigureAwait(false))
{
throw new RosBagException(RosBagReader.EndOfStream);
}
if (reader.CurrentRecordType != RosBagRecordType.BagHeader)
{
throw new RosBagException(HeaderMissing);
}
fields |= RosBagHeader.Fields.Op;
break;
default:
Debug.WriteLine($"unknown bag header field: {reader.Text}");
if (!await reader.ReadAsync(cancellation).ConfigureAwait(false))
{
throw new RosBagException(RosBagReader.EndOfStream);
}
break;
}
}
Debug.WriteLine("Extra headers in bag header. Size: " + reader.RemainingEntryBytes);
// skip remaining fields
await reader.Skip(cancellation).ConfigureAwait(false);
// skip data
if (!await reader.ReadAsync(cancellation).ConfigureAwait(false))
{
throw new RosBagException(RosBagReader.EndOfStream);
}
return(new RosBagHeader(
firstRecordOffset: firstRecordOffset,
connectionCount: connectionCount,
chunkCount: chunkCount));
}
public static async Task HeaderFieldValue(RosBagReader reader, ulong expectedValue)
{
ulong actual = await reader.ReadUInt64().ConfigureAwait(false);
Assert.AreEqual(expectedValue, actual);
}
public static async Task HeaderFieldValue(RosBagReader reader)
{
await reader.ReadAsync().ConfigureAwait(false);
Assert.AreEqual(RosBagNodeType.HeaderFieldValue, reader.NodeType);
}