Initial Commit

iTechSharp/srcbc/util/zlib/ZInflaterInputStream.cs

@@ -0,0 +1,126 @@
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.Zlib {
+    /// <summary>
+    /// Summary description for DeflaterOutputStream.
+    /// </summary>
+    public class ZInflaterInputStream : 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 inp=null;
+        private bool nomoreinput=false;
+
+        public ZInflaterInputStream(Stream inp) : this(inp, false) {
+        }
+    
+        public ZInflaterInputStream(Stream inp, bool nowrap) {
+            this.inp=inp;
+            z.inflateInit(nowrap);
+            z.next_in=buf;
+            z.next_in_index=0;
+            z.avail_in=0;
+        }
+    
+        public override bool CanRead {
+            get {
+                // TODO:  Add DeflaterOutputStream.CanRead getter implementation
+                return true;
+            }
+        }
+    
+        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 false;
+            }
+        }
+    
+        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) {
+        }
+    
+        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[] b, int off, int len) {
+            if(len==0)
+                return(0);
+            int err;
+            z.next_out=b;
+            z.next_out_index=off;
+            z.avail_out=len;
+            do {
+                if((z.avail_in==0)&&(!nomoreinput)) { // if buffer is empty and more input is avaiable, refill it
+                    z.next_in_index=0;
+                    z.avail_in=inp.Read(buf, 0, BUFSIZE);//(BUFSIZE<z.avail_out ? BUFSIZE : z.avail_out));
+                    if(z.avail_in==0) {
+                        z.avail_in=0;
+                        nomoreinput=true;
+                    }
+                }
+                err=z.inflate(flushLevel);
+                if(nomoreinput&&(err==JZlib.Z_BUF_ERROR))
+                    return(-1);
+                if(err!=JZlib.Z_OK && err!=JZlib.Z_STREAM_END)
+                    throw new IOException("inflating: "+z.msg);
+                if((nomoreinput||err==JZlib.Z_STREAM_END)&&(z.avail_out==len))
+                    return(0);
+            } 
+            while(z.avail_out==len&&err==JZlib.Z_OK);
+            //System.err.print("("+(len-z.avail_out)+")");
+            return(len-z.avail_out);
+        }
+    
+        public override void Flush() {
+            inp.Flush();
+        }
+    
+        public override void WriteByte(byte b) {
+        }
+
+        public override void Close() {
+            inp.Close();
+        }
+    
+        public override int ReadByte() {
+            if(Read(buf1, 0, 1)<=0)
+                return -1;
+            return(buf1[0]&0xFF);
+        }
+    }
+}