Make the bitstream version available in the context.

Author: flanglet

java/src/main/java/kanzi/io/CompressedInputStream.java

@@ -132,13 +132,15 @@ protected void readHeader() throws IOException
          throw new kanzi.io.IOException("Invalid stream type", Error.ERR_INVALID_FILE);
 
       // Read stream version
-      final int version = (int) this.ibs.readBits(4);
+      final int bsVersion = (int) this.ibs.readBits(4);
 
       // Sanity check
-      if (version != BITSTREAM_FORMAT_VERSION)
-         throw new kanzi.io.IOException("Invalid bitstream, cannot read this version of the stream: " + version,
+      if (bsVersion != BITSTREAM_FORMAT_VERSION)
+         throw new kanzi.io.IOException("Invalid bitstream, cannot read this version of the stream: " + bsVersion,
                  Error.ERR_STREAM_VERSION);
 
+      this.ctx.put("bsVersion", bsVersion);
+
       // Read block checksum
       if (this.ibs.readBit() == 1)
          this.hasher = new XXHash32(BITSTREAM_TYPE);

java/src/main/java/kanzi/io/CompressedOutputStream.java

@@ -146,6 +146,7 @@ public CompressedOutputStream(OutputBitStream obs, Map<String, Object> ctx)
       this.hasher = (checksum == true) ? new XXHash32(BITSTREAM_TYPE) : null;
       this.jobs = tasks;
       this.pool = threadPool;
+      ctx.put("bsVersion", BITSTREAM_FORMAT_VERSION);
       this.sa = new SliceByteArray(new byte[0], 0);
       this.buffers = new SliceByteArray[2*this.jobs];
       this.closed = new AtomicBoolean(false);