public static void SaveAsGzipFile(System.IO.Stream s, string content)
{
byte[] data = System.Text.Encoding.UTF8.GetBytes(content);
byte[] deflate = Deflator.DeflateToByteArray(data, 9);
s.WriteByte(31); // ID1
s.WriteByte(139); // ID2
s.WriteByte(8); // CM deflate
s.WriteByte(1); // text file
long mtime = (long)(System.DateTime.Now - UNIX_EPOCH).TotalSeconds;
s.WriteByte((byte)(0xFF & mtime));
s.WriteByte((byte)(0xFF & mtime >> 8));
s.WriteByte((byte)(0xFF & mtime >> 16));
s.WriteByte((byte)(0xFF & mtime >> 24));
s.WriteByte(2); // highest compression
s.WriteByte(3); // line break = unix style '\n'
s.Write(deflate, 0, deflate.Length);
uint crc32 = Deflator.CalculateCrc32(data);
s.WriteByte((byte)(0xFF & crc32));
s.WriteByte((byte)(0xFF & crc32 >> 8));
s.WriteByte((byte)(0xFF & crc32 >> 16));
s.WriteByte((byte)(0xFF & crc32 >> 24));
uint isize = (uint)data.Length;
s.WriteByte((byte)(0xFF & isize));
s.WriteByte((byte)(0xFF & isize >> 8));
s.WriteByte((byte)(0xFF & isize >> 16));
s.WriteByte((byte)(0xFF & isize >> 24));
}
// Compression functions
public int PutStream(byte [] data)
{
int result = StartObj();
Put("<<");
if (Compress)
{
Put("/Filter/FlateDecode");
#if ( UseZLib )
{
data = Deflate(data);
Put("/Length " + data.Length + ">>stream\n");
Put(data);
}
#else
{
MemoryBitStream bb = new MemoryBitStream();
Deflator.Deflate(data, bb);
int clen = bb.ByteSize();
Put("/Length " + clen + ">>stream\n");
bb.CopyTo(OS);
OS_Total += clen;
}
#endif
}
else
{
Put("/Length " + data.Length + ">>stream\n");
Put(data);
}
Put("\nendstream");
EndObj();
return(result);
}
public static byte [] Deflate(byte [] data)
{
#if ( UseZLib )
IO.MemoryStream cs = new IO.MemoryStream();
Zlib.ZDeflaterOutputStream zip = new Zlib.ZDeflaterOutputStream(cs);
zip.Write(data, 0, data.Length);
zip.Finish();
return(cs.ToArray());
#else
MemoryBitStream mbs = new MemoryBitStream();
Deflator.Deflate(data, mbs);
return(mbs.ToArray());
#endif
}
public static string CreateSfx85(string input)
{
// prepare resource
System.IO.Stream sFrame = getManifestResource("sfxframe85.js");
if (sFrame == null)
{
return(input);
}
// source
string compressed = Deflator.DeflateToJ85String(input, 9);
// inflate
System.IO.StreamReader sr = new System.IO.StreamReader(sFrame, System.Text.Encoding.UTF8);
string frame = sr.ReadToEnd();
sr.Close();
return(CreateSfx_embed(frame, compressed));
}
public static string DeflateToJ85String(string input,int level)
{
byte[] data=System.Text.Encoding.UTF8.GetBytes(input);
data=new Deflator().ZipDeflate(data,level);
return ToEncode85String(data);
}
public static string DeflateToBase64String(string input,int level)
{
byte[] data=System.Text.Encoding.UTF8.GetBytes(input);
data=new Deflator().ZipDeflate(data,level);
return System.Convert.ToBase64String(data);
}
