public static Stream GetFileAsStream(string sarc_name_full, string relative_path)
{
SarcFileLocation f_location = GetFileLocation(sarc_name_full, relative_path);
MemoryStream mem = new MemoryStream();
Stream stream = new FileStream(sarc_name_full, FileMode.Open);
stream.Seek(f_location.file_offset, SeekOrigin.Begin);
byte[] buffer = new byte[4096];
BinaryReader reader = new BinaryReader(stream);
BinaryWriter writer = new BinaryWriter(mem);
int nb = 0;
// записываем часть файла в mem
long nbytes = f_location.file_length;
while (nbytes > 0)
{
int portion = buffer.Length < nbytes ? buffer.Length : (int)nbytes;
nb = reader.Read(buffer, 0, portion);
writer.Write(buffer, 0, nb);
nbytes -= nb;
}
reader.Close(); stream.Close();
mem.Seek(0, SeekOrigin.Begin);
return(mem);
}
public static SarcFileLocation GetFileLocation(string sarc_full_name, string relative_path)
{
if (SarcCatalog == null || SarcCatalog.Count > 100000)
{
SarcCatalog = new Dictionary <string, SarcFileLocation>();
}
if (!SarcCatalog.ContainsKey(relative_path))
{
Stream stream = new FileStream(sarc_full_name, FileMode.Open, FileAccess.Read);
//stream.Seek(prologLength, SeekOrigin.Begin);
long offset = 0L;
for (int i = 0; i < 16; i++)
{
int b = stream.ReadByte(); if (b != 0)
{
offset = offset * 10 + (b - '0');
}
}
byte[] catalog_bytes = new byte[offset - 16];
var v = stream.Read(catalog_bytes, 0, (int)(offset - 16));
MemoryStream mem = new MemoryStream(catalog_bytes);
//Encoding etable = Encoding.UTF8;
//XElement cat = XElement.Parse(etable.GetString(catalog_bytes));
System.Xml.XmlReader xreader = new System.Xml.XmlTextReader(mem);
//XElement catalog = XElement.Load(new StreamReader(stream, System.Text.Encoding.UTF8));
XElement catalog = XElement.Load(xreader);
stream.Close();
foreach (XElement xfile in catalog.Elements("file"))
{
string r_path = xfile.Element("path").Value;
SarcFileLocation sfl = new SarcFileLocation()
{
relative_path = r_path,
sarc_full_name = sarc_full_name,
file_offset = Int64.Parse(xfile.Element("start").Value) + offset,
file_length = Int64.Parse(xfile.Element("length").Value)
};
SarcCatalog.Add(r_path, sfl);
}
}
return(SarcCatalog[relative_path]);
}
public static SarcFileLocation GetFileLocation(string sarc_full_name, string relative_path)
{
if (SarcCatalog == null || SarcCatalog.Count > 100000) SarcCatalog = new Dictionary<string, SarcFileLocation>();
if (!SarcCatalog.ContainsKey(relative_path))
{
Stream stream = new FileStream(sarc_full_name, FileMode.Open, FileAccess.Read);
//stream.Seek(prologLength, SeekOrigin.Begin);
long offset = 0L;
for (int i = 0; i < 16; i++) { int b = stream.ReadByte(); if (b != 0) offset = offset * 10 + (b - '0'); }
byte[] catalog_bytes = new byte[offset - 16];
var v = stream.Read(catalog_bytes, 0, (int)(offset - 16));
MemoryStream mem = new MemoryStream(catalog_bytes);
//Encoding etable = Encoding.UTF8;
//XElement cat = XElement.Parse(etable.GetString(catalog_bytes));
System.Xml.XmlReader xreader = new System.Xml.XmlTextReader(mem);
//XElement catalog = XElement.Load(new StreamReader(stream, System.Text.Encoding.UTF8));
XElement catalog = XElement.Load(xreader);
stream.Close();
foreach (XElement xfile in catalog.Elements("file"))
{
string r_path = xfile.Element("path").Value;
SarcFileLocation sfl = new SarcFileLocation()
{
relative_path = r_path,
sarc_full_name = sarc_full_name,
file_offset = Int64.Parse(xfile.Element("start").Value) + offset,
file_length = Int64.Parse(xfile.Element("length").Value)
};
SarcCatalog.Add(r_path, sfl);
}
}
return SarcCatalog[relative_path];
}
