public void Write(WriteContext c)
{
if (c.Description == null)
{
return;
}
if (c.Description.ItemDescription == null)
{
return;
}
var timeFields = c.Description.ItemDescription.Fields.Where(f => f.IsTime).ToList();
if (!timeFields.Any())
{
return;
}
// time format
if (!c.Description.Timescale.HasValue)
{
// TeaFile<T>.Create will assign the default Timescale to the descrption,
// so Timescale should always be set.
throw new InternalErrorException();
}
c.Writer.WriteInt64(c.Description.Timescale.Value.Epoch);
c.Writer.WriteInt64(c.Description.Timescale.Value.TicksPerDay);
// time fields
c.Writer.WriteInt32(timeFields.Count);
timeFields.ForEach(f => c.Writer.WriteInt32(f.Offset));
}
public void Write(WriteContext c)
{
if (c == null) throw new ArgumentNullException("c");
if (c.Description == null) return;
if (!c.Description.ContentDescription.IsSet()) return;
c.Writer.WriteText(c.Description.ContentDescription);
}
public void CreateSectionsTest()
{
var fw = new Mock<IFormattedWriter>(MockBehavior.Strict);
var wc = new WriteContext(fw.Object);
wc.ItemAreaStart.Should().Be(0); // not set yet
HeaderManager.Instance.CreateSections(wc);
wc.ItemAreaStart.Should().Be(32);
}
public void CreateSectionsTest()
{
var fw = new Mock <IFormattedWriter>(MockBehavior.Strict);
var wc = new WriteContext(fw.Object);
wc.ItemAreaStart.Should().Be(0); // not set yet
HeaderManager.Instance.CreateSections(wc);
wc.ItemAreaStart.Should().Be(32);
}
public void Write(WriteContext c)
{
if (c == null) throw new ArgumentNullException("c");
if (c.Description == null) return;
if (c.Description.NameValues == null) return;
if (c.Description.NameValues.Count == 0) return;
var nvs = c.Description.NameValues;
c.Writer.WriteInt32(nvs.Count());
nvs.ForEach(nv => c.Writer.WriteNameValue(nv));
}
/// <summary>
/// Creates the header's sections from the descriptions found in the context. Computes their positions
/// and sets the FirstItemPosition property in the context.
/// </summary>
internal byte[] CreateSections(WriteContext wc)
{
var saved = wc.Writer;
using (var sectionStream = new MemoryStream()) // see noop-Dispose comment below
{
var sectionWriter = new FormattedWriter(new FileIO(sectionStream));
int pos = 32; // sections start at byte position 32
foreach (var formatter in this.sectionFormatters)
{
// payload
using (var payloadStream = new MemoryStream()) // actually MemoryStream.Dispose() is a noop here, but for the code analysers pleasure we wrap these usings around
{
wc.Writer = new FormattedWriter(new FileIO(payloadStream));
formatter.Write(wc);
var size = (int)payloadStream.Length;
if (size > 0)
{
// section id
sectionWriter.WriteInt32(formatter.Id);
pos += 4;
// nextSectionOffset
sectionWriter.WriteInt32(size);
pos += 4;
// payload
sectionWriter.WriteRaw(payloadStream.ToArray());
pos += size; // no padding or spacing done here
wc.SectionCount++;
}
}
}
// padding
int paddingBytes = (8 - pos % 8);
if (paddingBytes == 8)
{
paddingBytes = 0;
}
sectionWriter.WriteRaw(new byte[paddingBytes]);
wc.ItemAreaStart = pos + paddingBytes; // first item starts padded on 8 byte boundary.
wc.Writer = saved;
return(sectionStream.ToArray());
}
}
public void Write(WriteContext c)
{
if (c == null)
{
throw new ArgumentNullException("c");
}
if (c.Description == null)
{
return;
}
if (!c.Description.ContentDescription.IsSet())
{
return;
}
c.Writer.WriteText(c.Description.ContentDescription);
}
public void Write(WriteContext c)
{
if (c.Description == null) return;
if (c.Description.ItemDescription == null) return;
var timeFields = c.Description.ItemDescription.Fields.Where(f => f.IsTime).ToList();
if (!timeFields.Any()) return;
// time format
if (!c.Description.Timescale.HasValue)
{
// TeaFile<T>.Create will assign the default Timescale to the descrption,
// so Timescale should always be set.
throw new InternalErrorException();
}
c.Writer.WriteInt64(c.Description.Timescale.Value.Epoch);
c.Writer.WriteInt64(c.Description.Timescale.Value.TicksPerDay);
// time fields
c.Writer.WriteInt32(timeFields.Count);
timeFields.ForEach(f => c.Writer.WriteInt32(f.Offset));
}
public WriteContext WriteHeader(IFormattedWriter w, TeaFileDescription description)
{
var wc = new WriteContext(w);
wc.ItemAreaStart = 32; // if no sections are created, ItemArea will start at 32. This value will change is sections are created
wc.Description = description;
byte[] sections = this.CreateSections(wc);
w.WriteInt64(0x0d0e0a0402080500);
w.WriteInt64(wc.ItemAreaStart);
w.WriteInt64(0);
w.WriteInt64(wc.SectionCount);
wc.Writer.WriteRaw(sections);
//var sectionPadding = wc.ItemAreaStart - w.Position;
//if (sectionPadding < 0) throw new FileFormatException("Stream position (potentially after writing sections) is behind item start. After opening a TeaFile and reading the header, the file pointer must be exactly at the begin of the item area.");
//w.WriteZeroBytes((int) sectionPadding);
return(wc);
}
public void Write(WriteContext c)
{
if (c == null)
{
throw new ArgumentNullException("c");
}
if (c.Description == null)
{
return;
}
if (c.Description.NameValues == null)
{
return;
}
if (c.Description.NameValues.Count == 0)
{
return;
}
var nvs = c.Description.NameValues;
c.Writer.WriteInt32(nvs.Count());
nvs.ForEach(nv => c.Writer.WriteNameValue(nv));
}
public WriteContext WriteHeader(IFormattedWriter w, TeaFileDescription description)
{
var wc = new WriteContext(w);
wc.ItemAreaStart = 32; // if no sections are created, ItemArea will start at 32. This value will change is sections are created
wc.Description = description;
byte[] sections = this.CreateSections(wc);
w.WriteInt64(0x0d0e0a0402080500);
w.WriteInt64(wc.ItemAreaStart);
w.WriteInt64(0);
w.WriteInt64(wc.SectionCount);
wc.Writer.WriteRaw(sections);
//var sectionPadding = wc.ItemAreaStart - w.Position;
//if (sectionPadding < 0) throw new FileFormatException("Stream position (potentially after writing sections) is behind item start. After opening a TeaFile and reading the header, the file pointer must be exactly at the begin of the item area.");
//w.WriteZeroBytes((int) sectionPadding);
return wc;
}
/// <summary>
/// Creates the header's sections from the descriptions found in the context. Computes their positions
/// and sets the FirstItemPosition property in the context.
/// </summary>
internal byte[] CreateSections(WriteContext wc)
{
var saved = wc.Writer;
using (var sectionStream = new MemoryStream()) // see noop-Dispose comment below
{
var sectionWriter = new FormattedWriter(new FileIO(sectionStream));
int pos = 32; // sections start at byte position 32
foreach (var formatter in this.sectionFormatters)
{
// payload
using (var payloadStream = new MemoryStream()) // actually MemoryStream.Dispose() is a noop here, but for the code analysers pleasure we wrap these usings around
{
wc.Writer = new FormattedWriter(new FileIO(payloadStream));
formatter.Write(wc);
var size = (int)payloadStream.Length;
if (size > 0)
{
// section id
sectionWriter.WriteInt32(formatter.Id);
pos += 4;
// nextSectionOffset
sectionWriter.WriteInt32(size);
pos += 4;
// payload
sectionWriter.WriteRaw(payloadStream.ToArray());
pos += size; // no padding or spacing done here
wc.SectionCount++;
}
}
}
// padding
int paddingBytes = (8 - pos % 8);
if (paddingBytes == 8) paddingBytes = 0;
sectionWriter.WriteRaw(new byte[paddingBytes]);
wc.ItemAreaStart = pos + paddingBytes; // first item starts padded on 8 byte boundary.
wc.Writer = saved;
return sectionStream.ToArray();
}
}
