Initial Commit

iTechSharp/srcbc/util/zlib/ZDeflaterOutputStream.cs

@@ -0,0 +1,150 @@
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.Zlib {
+    /// <summary>
+    /// Summary description for DeflaterOutputStream.
+    /// </summary>
+    public class ZDeflaterOutputStream : Stream {
+        protected ZStream z=new ZStream();
+        protected int flushLevel=JZlib.Z_NO_FLUSH;
+        private const int BUFSIZE = 4192;
+        protected byte[] buf=new byte[BUFSIZE];
+        private byte[] buf1=new byte[1];
+
+        protected Stream outp;
+
+        public ZDeflaterOutputStream(Stream outp) : this(outp, 6, false) {
+        }
+    
+        public ZDeflaterOutputStream(Stream outp, int level) : this(outp, level, false) {
+        }
+    
+        public ZDeflaterOutputStream(Stream outp, int level, bool nowrap) {
+            this.outp=outp;
+            z.deflateInit(level, nowrap);
+        }
+    
+    
+        public override bool CanRead {
+            get {
+                // TODO:  Add DeflaterOutputStream.CanRead getter implementation
+                return false;
+            }
+        }
+    
+        public override bool CanSeek {
+            get {
+                // TODO:  Add DeflaterOutputStream.CanSeek getter implementation
+                return false;
+            }
+        }
+    
+        public override bool CanWrite {
+            get {
+                // TODO:  Add DeflaterOutputStream.CanWrite getter implementation
+                return true;
+            }
+        }
+    
+        public override long Length {
+            get {
+                // TODO:  Add DeflaterOutputStream.Length getter implementation
+                return 0;
+            }
+        }
+    
+        public override long Position {
+            get {
+                // TODO:  Add DeflaterOutputStream.Position getter implementation
+                return 0;
+            }
+            set {
+                // TODO:  Add DeflaterOutputStream.Position setter implementation
+            }
+        }
+    
+        public override void Write(byte[] b, int off, int len) {
+            if(len==0)
+                return;
+            int err;
+            z.next_in=b;
+            z.next_in_index=off;
+            z.avail_in=len;
+            do{
+                z.next_out=buf;
+                z.next_out_index=0;
+                z.avail_out=BUFSIZE;
+                err=z.deflate(flushLevel);
+                if(err!=JZlib.Z_OK)
+                    throw new IOException("deflating: "+z.msg);
+				if (z.avail_out < BUFSIZE)
+				{
+					outp.Write(buf, 0, BUFSIZE-z.avail_out);
+				}
+            }
+            while(z.avail_in>0 || z.avail_out==0);
+        }
+    
+        public override long Seek(long offset, SeekOrigin origin) {
+            // TODO:  Add DeflaterOutputStream.Seek implementation
+            return 0;
+        }
+    
+        public override void SetLength(long value) {
+            // TODO:  Add DeflaterOutputStream.SetLength implementation
+
+        }
+    
+        public override int Read(byte[] buffer, int offset, int count) {
+            // TODO:  Add DeflaterOutputStream.Read implementation
+            return 0;
+        }
+    
+        public override void Flush() {
+            outp.Flush();
+        }
+    
+        public override void WriteByte(byte b) {
+            buf1[0]=(byte)b;
+            Write(buf1, 0, 1);
+        }
+
+        public void Finish() {
+            int err;
+            do{
+                z.next_out=buf;
+                z.next_out_index=0;
+                z.avail_out=BUFSIZE;
+                err=z.deflate(JZlib.Z_FINISH);
+                if(err!=JZlib.Z_STREAM_END && err != JZlib.Z_OK)
+                    throw new IOException("deflating: "+z.msg);
+                if(BUFSIZE-z.avail_out>0){
+                    outp.Write(buf, 0, BUFSIZE-z.avail_out);
+                }
+            }
+            while(z.avail_in>0 || z.avail_out==0);
+            Flush();
+        }
+
+        public void End() {
+            if(z==null)
+                return;
+            z.deflateEnd();
+            z.free();
+            z=null;
+        }
+        
+        public override void Close() {
+            try{
+                try{Finish();}
+                catch (IOException) {}
+            }
+            finally{
+                End();
+                outp.Close();
+                outp=null;
+            }
+        }
+    }
+}