Stream to Sbyte[]

Hi,

I'm trying a stream to sbyte conversion as follows:

Code:

---


 private SByte[] streamToSbyte(Stream stream)
        {
            sbyte[] sbuffer = new sbyte[stream.Length];
            byte[] buffer = new byte[stream.Length];
            int read=0;
            try
            {
                using (MemoryStream ms = new MemoryStream())
                {
                    while (read <= 0)
                    {
                        read = stream.Read(buffer, 0, buffer.Length);
                        ms.Write(buffer, 0, read);
                    }
                }
                for (int index = 0; index < buffer.Length; index++)
                {
                    sbuffer[index] = (sbyte)buffer[index];
                }
                return sbuffer;
            }

            catch (Exception e)
            {
                Console.WriteLine("Exception caught here" + e.ToString());
                return sbuffer;
            }

        }

---

But I get Invalid operation exception at the while! :(
Could anyone help please?

AK

I'm not exactly sure what you're doing there. It's not that complicated of an operation.

Code:

---

static private sbyte[] streamToSbyte(Stream stream)
{
        List<sbyte> list = new List<sbyte>();
        {
                int ch;
                while ((ch = stream.ReadByte()) != -1)
                        list.Add((sbyte)ch);
        }
        return list.ToArray();
}

---

You rock piano :)
Actually what I want to do is write a stream-decompress fn in C#. I've written it as:

Code:

---

public MemoryStream decompressStream(Stream sourceStream, String path)
        {
            String fileName;
            MemoryStream ms;
            sbyte[] inputBuff;
            java.io.ByteArrayInputStream bais;
            try
            {
                fileName = extractFileName(path);
                inputBuff = streamToSbyte(sourceStream);
                bais = new java.io.ByteArrayInputStream(inputBuff);

                java.util.zip.ZipInputStream zis = new java.util.zip.ZipInputStream(bais);
                java.util.zip.ZipEntry ze;
                java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

                sbyte[] buf = new sbyte[1024];
                int len;
                while ((ze = zis.getNextEntry()) != null)
                {
                    fileName = ze.getName();
                    while ((len = zis.read(buf)) >= 0)
                    {
                        baos.write(buf, 0, len);
                    }
                    baos.close();
                }
                zis.close();
                bais.close();
                Console.WriteLine("Decompression ok!");
                ms = baosToStream(baos);
                return ms;
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                ms = new MemoryStream();
                return ms;
            }

        }

---

But I again get an error in the while ((len = zis.read(buf)) >= 0) line! :(
An EOFException...

Any help is appreciated...

AK

The code is running for 3Kb zip file but the EOF error shows up when I try to run a 37Kb zip file :(

Code:

---

java.util.zip.ZipInputStream

---

I've never used that class, so you might take a look at its documentation.

If you just want compression/decompression, you could use either the GZipStream or the DeflateStream classes in the System.IO.Compression namespace.

I've tried that but the main problem with it is that I cannot name the zipped file using that class.What I mean is say I want to zip abc.txt , this deflatestream class will create one abc.zip but when I extract it I dont get a file named abc.txt within it ...