diff -r 9aed8c2ea97d -r 3ab78bf63467 src/StreamInputSource.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/StreamInputSource.h	Fri Jan 11 00:29:32 2019 +0100
@@ -0,0 +1,72 @@
+/**
+ * Relational pipes
+ * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <istream>
+
+#include <xercesc/sax/InputSource.hpp>
+#include <xercesc/util/PlatformUtils.hpp>
+#include <xercesc/util/BinInputStream.hpp>
+
+namespace relpipe {
+namespace in {
+namespace xml {
+
+class StreamInputSource : public xercesc::InputSource {
+private:
+	std::istream& input;
+
+	class StreamBinInputStream : public xercesc::BinInputStream {
+	private:
+		std::istream& input;
+	public:
+
+		StreamBinInputStream(std::istream& input) : BinInputStream(), input(input) {
+		}
+
+		XMLFilePos curPos() const override {
+			return input.tellg();
+		}
+
+		const XMLCh* getContentType() const override {
+			return nullptr;
+		}
+
+		XMLSize_t readBytes(XMLByte * const toFill, const XMLSize_t maxToRead) override {
+			input.read((char*) toFill, maxToRead);
+			return input.gcount();
+		}
+	};
+
+public:
+
+	StreamInputSource(std::istream& input, xercesc::MemoryManager * const manager = xercesc::XMLPlatformUtils::fgMemoryManager) : InputSource(manager), input(input) {
+	}
+
+	virtual ~StreamInputSource() {
+	}
+
+	xercesc::BinInputStream* makeStream() const override {
+		// TODO: avoid multiple calls, input can be used only once 
+		return new StreamBinInputStream(input);
+	}
+};
+
+}
+}
+}
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