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diff --git a/src/liblzma/api/lzma/auto.h b/src/liblzma/api/lzma/auto.h
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+++ b/src/liblzma/api/lzma/auto.h
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+/**
+ * \file        lzma/auto.h
+ * \brief       Decoder with automatic file format detection
+ *
+ * \author      Copyright (C) 1999-2006 Igor Pavlov
+ * \author      Copyright (C) 2007 Lasse Collin
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ */
+
+#ifndef LZMA_H_INTERNAL
+#	error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief       Decode .lzma Streams and LZMA_Alone files with autodetection
+ *
+ * Autodetects between the .lzma Stream and LZMA_Alone formats, and
+ * calls lzma_stream_decoder_init() or lzma_alone_decoder_init() once
+ * the type of the file has been detected.
+ *
+ * \param       strm        Pointer to propertily prepared lzma_stream
+ * \param       header      Pointer to hold a pointer to Extra Records read
+ *                          from the Header Metadata Block. Use NULL if
+ *                          you don't care about Extra Records.
+ * \param       footer      Same as header, but for Footer Metadata Block.
+ *
+ * \return      - LZMA_OK: Initialization was successful.
+ *              - LZMA_MEM_ERROR: Cannot allocate memory.
+ */
+extern lzma_ret lzma_auto_decoder(lzma_stream *strm,
+		lzma_extra **header, lzma_extra **footer);