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diff --git a/src/liblzma/api/lzma/raw.h b/src/liblzma/api/lzma/raw.h
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+/**
+ * \file        lzma/raw.h
+ * \brief       Raw encoder and decoder
+ *
+ * \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       Initializes raw encoder
+ *
+ * This function may be useful when implementing custom file formats.
+ *
+ * \param       strm    Pointer to properly prepared lzma_stream
+ * \param       options Array of lzma_options_filter structures.
+ *                      The end of the array must be marked with
+ *                      .id = LZMA_VLI_VALUE_UNKNOWN. The minimum
+ *                      number of filters is zero; the maximum is
+ *                      determined by available memory.
+ * \param       uncompressed_size
+ *                      Size of the uncompressed data. If it is unknown,
+ *                      use LZMA_VLI_VALUE_UNKNOWN. You need to give the
+ *                      same value to the raw decoder to decode the data.
+ * \param       allow_implicit
+ *                      If true, an implicit Copy or Subblock filter should be
+ *                      automatically added when needed. If this is false and
+ *                      an implicit filter would be needed, LZMA_PROG_ERROR is
+ *                      returned.
+ *
+ * The `action' with lzma_code() can be LZMA_RUN, LZMA_SYNC_FLUSH (if the
+ * filter chain support it), or LZMA_FINISH.
+ *
+ * \return      - LZMA_OK
+ *              - LZMA_MEM_ERROR
+ *              - LZMA_HEADER_ERROR
+ *              - LZMA_PROG_ERROR
+ */
+extern lzma_ret lzma_raw_encoder(
+		lzma_stream *strm, const lzma_options_filter *options,
+		lzma_vli uncompressed_size, lzma_bool allow_implicit);
+
+
+/**
+ * \brief       Initializes raw decoder
+ *
+ * The initialization of raw decoder goes similarly to raw encoder.
+ *
+ * The `action' with lzma_code() can be LZMA_RUN or LZMA_SYNC_FLUSH.
+ *
+ * \return      - LZMA_OK
+ *              - LZMA_MEM_ERROR
+ *              - LZMA_HEADER_ERROR
+ *              - LZMA_PROG_ERROR
+ */
+extern lzma_ret lzma_raw_decoder(
+		lzma_stream *strm, const lzma_options_filter *options,
+		lzma_vli uncompressed_size, lzma_bool allow_implicit);