compressor: added util for testing compression in DB.

utils/compressor/main.cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+
+#include <Poco/SharedPtr.h>
+
+#include <DB/IO/WriteBufferFromOStream.h>
+#include <DB/IO/ReadBufferFromIStream.h>
+#include <DB/IO/CompressedWriteBuffer.h>
+#include <DB/IO/CompressedReadBuffer.h>
+#include <DB/IO/copyData.h>
+
+
+int main(int argc, char ** argv)
+{
+	if (argc > 2 || (argc == 2 && strcmp(argv[1], "-d")))
+	{
+		std::cerr << "Usage: " << argv[0] << " [-d] < in > out" << std::endl;
+		return 1;
+	}
+
+	Poco::SharedPtr<DB::ReadBuffer> rb = new DB::ReadBufferFromIStream(std::cin);
+	Poco::SharedPtr<DB::WriteBuffer> wb = new DB::WriteBufferFromOStream(std::cout);
+	Poco::SharedPtr<DB::ReadBuffer> from;
+	Poco::SharedPtr<DB::WriteBuffer> to;
+
+	if (argc == 1)
+	{
+		/// Сжатие
+		from = rb;
+		to = new DB::CompressedWriteBuffer(*wb);
+	}
+	else
+	{
+		/// Разжатие
+		from = new DB::CompressedReadBuffer(*rb);
+		to = wb;
+	}
+
+	DB::copyData(*from, *to);
+
+    return 0;
+}

utils/compressor/test.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+./compressor < compressor > compressor.qlz
+./compressor -d < compressor.qlz > compressor2
+cmp compressor compressor2 && echo "Ok." || echo "Fail."