public static PssgFile ReadPssg(Stream fileStream, PssgFileType fileType)
{
PssgFile file = new PssgFile(fileType);
using (PssgBinaryReader reader = new PssgBinaryReader(EndianBitConverter.Big, fileStream, true))
{
reader.ReadPSSGString(4); // "PSSG"
int size = reader.ReadInt32();
// Load all the pssg node/attribute names
PssgSchema.ClearSchemaIds();
PssgSchema.LoadFromPssg(reader);
long positionAfterInfo = reader.BaseStream.Position;
file.RootNode = new PssgNode(reader, file, null, true);
if (reader.BaseStream.Position < reader.BaseStream.Length)
{
reader.BaseStream.Position = positionAfterInfo;
file.RootNode = new PssgNode(reader, file, null, false);
if (reader.BaseStream.Position < reader.BaseStream.Length)
{
throw new Exception("This file is improperly saved and not supported by this version of the PSSG editor." + Environment.NewLine + Environment.NewLine +
"Get an older version of the program if you wish to take out its contents, but put it back together using this program and the original version of the pssg file.");
}
}
}
return(file);
}
public void WritePssg(Stream fileStream)
{
using (PssgBinaryWriter writer = new PssgBinaryWriter(EndianBitConverter.Big, fileStream, true))
{
writer.Write(Encoding.ASCII.GetBytes("PSSG"));
writer.Write(0); // Length, filled in later
if (RootNode != null)
{
// make all ids -1
PssgSchema.ClearSchemaIds();
// Get the counts, and update ids of the nodes/attributes used in this file
GetNodeAttributeNameCount(this, out var nodeNameCount, out var attributeNameCount);
writer.Write(attributeNameCount);
writer.Write(nodeNameCount);
// Update ids again to make sequential and save ones used in this file
PssgSchema.SaveToPssg(writer);
RootNode.UpdateSize();
RootNode.Write(writer);
}
writer.BaseStream.Position = 4;
writer.Write((int)writer.BaseStream.Length - 8);
}
public void WritePssg(Stream fileStream, bool close)
{
PssgBinaryWriter writer = new PssgBinaryWriter(new BigEndianBitConverter(), fileStream);
try
{
writer.Write(Encoding.ASCII.GetBytes("PSSG"));
writer.Write(0); // Length, filled in later
if (RootNode != null)
{
int nodeNameCount = 0;
int attributeNameCount = 0;
PssgSchema.ClearSchemaIds(); // make all ids -1
RootNode.UpdateId(ref nodeNameCount, ref attributeNameCount);
writer.Write(attributeNameCount);
writer.Write(nodeNameCount);
PssgSchema.SaveToPssg(writer); // Update Ids again, to make sequential
RootNode.UpdateSize();
RootNode.Write(writer);
}
writer.BaseStream.Position = 4;
writer.Write((int)writer.BaseStream.Length - 8);
if (close)
{
writer.Close();
}
}
catch (Exception ex)
{
if (writer != null)
{
writer.Close();
}
throw ex;
}
}
