public PatchPart ReadPart()
{
PatchPart part = new PatchPart();
int switchByte = 0;
StringBuilder sb = new StringBuilder();
while ((switchByte = reader.BaseStream.ReadByte()) > 2)
{
sb.Append((char)switchByte);
}
if (switchByte == -1) //失败
{
return(null);
}
part.Type = (PatchType)switchByte;
part.FileName = sb.ToString();
switch (part.Type)
{
case PatchType.Create:
if (Path.HasExtension(part.FileName))
{
part.FileLength = reader.ReadInt32();
part.Checksum = reader.ReadUInt32();
}
break;
case PatchType.Rebuild:
part.OldChecksum = reader.ReadUInt32();
part.Checksum = reader.ReadUInt32();
break;
case PatchType.Delete:
break;
}
return(part);
}
public void WritePart(PatchPart part)
{
this.deflateWriter.Write(part.FileName.ToCharArray());
this.deflateWriter.Write((byte)part.Type); //尾部标识
switch (part.Type)
{
case PatchType.Create:
if (Path.HasExtension(part.FileName))
{
this.deflateWriter.Write(part.FileLength);
this.deflateWriter.Write(part.Checksum);
}
break;
case PatchType.Rebuild:
this.deflateWriter.Write(part.OldChecksum);
this.deflateWriter.Write(part.Checksum);
break;
case PatchType.Delete:
break;
}
}