/// <summary>
/// Loads the GFF file from the specified stream.
/// </summary>
/// <param name="stream">The stream to load the GFF file from.s</param>
private void LoadStream(Stream stream)
{
// Read the header.
NWNLogger.Log(0, "Gff.LoadStream loading header");
GffHeader header = new GffHeader(stream);
NWNLogger.Log(1, "Gff.LoadStream version {0}", header.VersionText);
if ("V3.2" != header.VersionText)
throw new NWNException("Version {0} GFF files are unsupported", header.VersionText);
NWNLogger.Log(0, "Gff.LoadStream reading raw GFF data");
RawGffData rawData = new RawGffData(stream, header);
topLevel = GffStructField.GetFieldStruct(rawData.GetStruct(0), rawData);
}
/// <summary>
/// This method initializes the module header based on the contents of
/// the raw data object.
/// </summary>
/// <param name="header">The header to initialize</param>
public void InitializeHeader(ref GffHeader header)
{
int offset = Marshal.SizeOf(typeof(GffHeader));
header.StructCount = (int) structsStream.Length / Marshal.SizeOf(typeof(RawGffStruct));;
header.StructOffset = offset;
offset += (int) structsStream.Length;
header.FieldCount = (int) fieldsStream.Length / Marshal.SizeOf(typeof(RawGffField));
header.FieldOffset = offset;
offset += (int) fieldsStream.Length;
header.LabelCount = (int) labelsStream.Length / ResRefLength;
header.LabelOffset = offset;
offset += (int) labelsStream.Length;
header.FieldDataCount = (int) complexDataStream.Length;
header.FieldDataOffset = offset;
offset += (int) complexDataStream.Length;
header.FieldIndecesCount = (int) fieldIndecesStream.Length;
header.FieldIndecesOffset = offset;
offset += (int) fieldIndecesStream.Length;
header.ListIndecesCount = (int) listIndecesStream.Length;
header.ListIndecesOffset = offset;
}
/// <summary>
/// Saves the GFF, using a new file name.
/// </summary>
/// <param name="fileName">The new file name for the GFF</param>
public void SaveAs(string fileName)
{
// Save the top level structure to the raw data.
RawGffData rawData = new RawGffData();
GffStructField.SaveFieldStruct(0xffffffff, topLevel, rawData);
// Create a header for the GFF file.
string type = Path.GetExtension(fileName);
type = type.Substring(1, type.Length - 1);
GffHeader header = new GffHeader(type);
rawData.InitializeHeader(ref header);
// Create the disk file and save the header and raw data.
using (FileStream writer = new FileStream(fileName, FileMode.Create,
FileAccess.Write, FileShare.Write))
{
header.Serialize(writer);
rawData.Save(writer);
writer.Close();
}
}
/// <summary>
/// Constructor to create a RawGffData object used for reading a GFF file
/// </summary>
/// <param name="s">Stream for the file</param>
/// <param name="header">The file's header</param>
public RawGffData(Stream s, GffHeader header)
{
access = FileAccess.Read;
// Read the various pieces of the GFF file into memory, placing
// each in a read only memory stream.
structsStream = CreateReadingStream(s, header.StructOffset,
header.StructCount * Marshal.SizeOf(typeof(RawGffStruct)));
fieldsStream = CreateReadingStream(s, header.FieldOffset,
header.FieldCount * Marshal.SizeOf(typeof(RawGffField)));
labelsStream = CreateReadingStream(s, header.LabelOffset,
header.LabelCount * ResRefLength);
complexDataStream = CreateReadingStream(s, header.FieldDataOffset,
header.FieldDataCount);
fieldIndecesStream = CreateReadingStream(s, header.FieldIndecesOffset,
header.FieldIndecesCount);
listIndecesStream = CreateReadingStream(s, header.ListIndecesOffset,
header.ListIndecesCount);
}
