Imported to git.

23 files changed, 3518 insertions, 0 deletions

diff --git a/src/liblzma/api/lzma/alignment.h b/src/liblzma/api/lzma/alignment.h
new file mode 100644
index 00000000..6672656c
--- /dev/null
+++ b/src/liblzma/api/lzma/alignment.h
@@ -0,0 +1,60 @@
+/**
+ * \file        lzma/alignment.h
+ * \brief       Calculating input and output alignment of filter chains
+ *
+ * \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       Calculates the preferred alignment of the input data
+ *
+ * FIXME desc
+ */
+extern uint32_t lzma_alignment_input(
+		const lzma_options_filter *filters, uint32_t guess);
+
+
+/**
+ * \brief       Calculates the alignment of the encoded output
+ *
+ * Knowing the alignment of the output data is useful e.g. in the Block
+ * encoder which tries to align the Compressed Data field optimally.
+ *
+ * \param       filters   Pointer to lzma_options_filter array, whose last
+ *                        member must have .id = LZMA_VLI_VALUE_UNKNOWN.
+ * \param       guess     The value to return if the alignment of the output
+ *                        is the same as the alignment of the input data.
+ *                        If you want to always detect this special case,
+ *                        this guess to zero; this function never returns
+ *                        zero unless guess is zero.
+ *
+ * \return      In most cases, a small positive integer is returned;
+ *              for optimal use, the encoded output of this filter
+ *              chain should start at on offset that is a multiple of
+ *              the returned integer value.
+ *
+ *              If the alignment of the output is the same as the input
+ *              data (which this function cannot know), \a guess is
+ *              returned.
+ *
+ *              If an error occurs (that is, unknown Filter IDs or filter
+ *              options), UINT32_MAX is returned.
+ */
+extern uint32_t lzma_alignment_output(
+		const lzma_options_filter *filters, uint32_t guess);
diff --git a/src/liblzma/api/lzma/alone.h b/src/liblzma/api/lzma/alone.h
new file mode 100644
index 00000000..1a6b8e27
--- /dev/null
+++ b/src/liblzma/api/lzma/alone.h
@@ -0,0 +1,82 @@
+/**
+ * \file        lzma/alone.h
+ * \brief       Handling of the legacy LZMA_Alone format
+ *
+ * \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       Options for files in the LZMA_Alone format
+ */
+typedef struct {
+	/**
+	 * \brief       Uncompressed Size and usage of End of Payload Marker
+	 *
+	 * In contrast to .lzma Blocks, LZMA_Alone format cannot have both
+	 * uncompressed size field in the header and end of payload marker.
+	 * If you don't know the uncompressed size beforehand, set it to
+	 * LZMA_VLI_VALUE_UNKNOWN and liblzma will embed end of payload
+	 * marker.
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       LZMA options
+	 *
+	 * The LZMA_Alone format supports only one filter: the LZMA filter.
+	 *
+	 * \note        There exists also an undocumented variant of the
+	 *              LZMA_Alone format, which uses the x86 filter in
+	 *              addition to LZMA. This format was never supported
+	 *              by LZMA Utils and is not supported by liblzma either.
+	 */
+	lzma_options_lzma lzma;
+
+} lzma_options_alone;
+
+
+/**
+ * \brief       Initializes LZMA_Alone encoder
+ *
+ * LZMA_Alone files have the suffix .lzma like the .lzma Stream files.
+ * LZMA_Alone format supports only one filter, the LZMA filter. There is
+ * no support for integrity checks like CRC32.
+ *
+ * Use this format if and only if you need to create files readable by
+ * legacy LZMA tools.
+ *
+ * LZMA_Alone encoder doesn't support LZMA_SYNC_FLUSH or LZMA_FULL_FLUSH.
+ *
+ * \return      - LZMA_OK
+ *              - LZMA_MEM_ERROR
+ *              - LZMA_PROG_ERROR
+ */
+extern lzma_ret lzma_alone_encoder(
+		lzma_stream *strm, const lzma_options_alone *options);
+
+
+/**
+ * \brief       Initializes decoder for LZMA_Alone file
+ *
+ * The LZMA_Alone decoder supports LZMA_SYNC_FLUSH.
+ *
+ * \return      - LZMA_OK
+ *              - LZMA_MEM_ERROR
+ */
+extern lzma_ret lzma_alone_decoder(lzma_stream *strm);
diff --git a/src/liblzma/api/lzma/auto.h b/src/liblzma/api/lzma/auto.h
new file mode 100644
index 00000000..327e726f
--- /dev/null
+++ b/src/liblzma/api/lzma/auto.h
@@ -0,0 +1,41 @@
+/**
+ * \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);
diff --git a/src/liblzma/api/lzma/base.h b/src/liblzma/api/lzma/base.h
new file mode 100644
index 00000000..53cf89f5
--- /dev/null
+++ b/src/liblzma/api/lzma/base.h
@@ -0,0 +1,410 @@
+/**
+ * \file        lzma/base.h
+ * \brief       Data types and functions used in many places of the public API
+ *
+ * \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       Boolean
+ *
+ * This is here because C89 doesn't have stdbool.h. To set a value for
+ * variables having type lzma_bool, you can use
+ *   - C99's `true' and `false' from stdbool.h;
+ *   - C++'s internal `true' and `false'; or
+ *   - integers one (true) and zero (false).
+ */
+typedef unsigned char lzma_bool;
+
+
+/**
+ * \brief       Return values used by several functions in liblzma
+ *
+ * Check the descriptions of specific functions to find out which return
+ * values they can return and the exact meanings of the values in every
+ * situation. The descriptions given here are only suggestive.
+ */
+typedef enum {
+	LZMA_OK                 =  0,
+		/**<
+		 * \brief       Operation completed successfully
+		 */
+
+	LZMA_STREAM_END         =  1,
+		/**<
+		 * \brief       End of stream was reached
+		 *
+		 * The application should pick the last remaining output
+		 * bytes from strm->next_out.
+		 */
+
+	LZMA_PROG_ERROR       = -2,
+		/**<
+		 * \brief       Programming error
+		 *
+		 * This indicates that the arguments given to the function are
+		 * invalid or the internal state of the decoder is corrupt.
+		 *   - Function arguments are invalid or the structures
+		 *     pointed by the argument pointers are invalid
+		 *     e.g. if strm->next_out has been set to NULL and
+		 *     strm->avail_out > 0 when calling lzma_code().
+		 *   - lzma_* functions have been called in wrong order
+		 *     e.g. lzma_code() was called right after lzma_end().
+		 *   - If errors occur randomly, the reason might be flaky
+		 *     hardware.
+		 *
+		 * If you think that your code is correct, this error code
+		 * can be a sign of a bug in liblzma. See the documentation
+		 * how to report bugs.
+		 */
+
+	LZMA_DATA_ERROR         = -3,
+		/**<
+		 * \brief       Data is corrupt
+		 *
+		 * - Encoder: The input size doesn't match the uncompressed
+		 *   size given to lzma_*_encoder_init().
+		 * - Decoder: The input is corrupt. This includes corrupted
+		 *   header, corrupted compressed data, and unmatching
+		 *   integrity Check.
+		 *
+		 * \todo        What can be done if encoder returns this?
+		 *              Probably can continue by fixing the input
+		 *              amount, but make sure.
+		 */
+
+	LZMA_MEM_ERROR          = -4,
+		/**<
+		 * \brief       Cannot allocate memory
+		 *
+		 * Memory allocation failed.
+		 */
+
+	LZMA_BUF_ERROR          = -5,
+		/**<
+		 * \brief       No progress is possible
+		 *
+		 * This may happen when avail_in or avail_out is zero.
+		 *
+		 * \note        This error is not fatal. Coding can continue
+		 *              normally once the reason for this error has
+		 *              been fixed.
+		 */
+
+	LZMA_HEADER_ERROR       = -6,
+		/**<
+		 * \brief       Invalid or unsupported header
+		 *
+		 * Invalid or unsupported options, for example
+		 *  - unsupported filter(s) or filter options; or
+		 *  - reserved bits set in headers (decoder only).
+		 *
+		 * Rebuilding liblzma with more features enabled, or
+		 * upgrading to a newer version of liblzma may help.
+		 */
+
+	LZMA_UNSUPPORTED_CHECK  = -7,
+		/**<
+		 * \brief       Check type is unknown
+		 *
+		 * The type of Check is not supported, and thus the Check
+		 * cannot be calculated. In the encoder, this is an error.
+		 * In the decoder, this is only a warning and decoding can
+		 * still proceed normally (but the Check is ignored).
+		 */
+} lzma_ret;
+
+
+/**
+ * \brief       The `action' argument for lzma_code()
+ */
+typedef enum {
+	LZMA_RUN = 0,
+		/**<
+		 * Encoder: Encode as much input as possible. Some internal
+		 * buffering will probably be done (depends on the filter
+		 * chain in use), which causes latency: the input used won't
+		 * usually be decodeable from the output of the same
+		 * lzma_code() call.
+		 *
+		 * Decoder: Decode as much input as possible and produce as
+		 * much output as possible. This action provides best
+		 * throughput, but may introduce latency, because the
+		 * decoder may decode more data into its internal buffers
+		 * than that fits into next_out.
+		 */
+
+	LZMA_SYNC_FLUSH = 1,
+		/**<
+		 * Encoder: Makes all the data given to liblzma via next_in
+		 * available in next_out without resetting the filters. Call
+		 * lzma_code() with LZMA_SYNC_FLUSH until it returns
+		 * LZMA_STREAM_END. Then continue encoding normally.
+		 *
+		 * \note        Synchronous flushing is supported only by
+		 *              some filters. Some filters support it only
+		 *              partially.
+		 *
+		 * Decoder: Asks the decoder to decode only as much as is
+		 * needed to fill next_out. This decreases latency with some
+		 * filters, but is likely to decrease also throughput. It is
+		 * a good idea to use this flag only when it is likely that
+		 * you don't need more output soon.
+		 *
+		 * \note        With decoder, this is not comparable to
+		 *              zlib's Z_SYNC_FLUSH.
+		 */
+
+	LZMA_FULL_FLUSH = 2,
+		/**<
+		 * Finishes encoding of the current Data Block. All the input
+		 * data going to the current Data Block must have been given
+		 * to the encoder (the last bytes can still be pending in
+		 * next_in). Call lzma_code() with LZMA_FULL_FLUSH until
+		 * it returns LZMA_STREAM_END. Then continue normally with
+		 * LZMA_RUN or finish the Stream with LZMA_FINISH.
+		 *
+		 * This action is supported only by Multi-Block Stream
+		 * encoder. If there is no unfinished Data Block, no empty
+		 * Data Block is created.
+		 */
+
+	LZMA_FINISH = 3
+		/**<
+		 * Finishes the encoding operation. All the input data must
+		 * have been given to the encoder (the last bytes can still
+		 * be pending in next_in). Call lzma_code() with LZMA_FINISH
+		 * until it returns LZMA_STREAM_END.
+		 *
+		 * This action is not supported by decoders.
+		 */
+} lzma_action;
+
+
+/**
+ * \brief       Custom functions for memory handling
+ *
+ * A pointer to lzma_allocator may be passed via lzma_stream structure
+ * to liblzma. The library will use these functions for memory handling
+ * instead of the default malloc() and free().
+ *
+ * liblzma doesn't make an internal copy of lzma_allocator. Thus, it is
+ * OK to change these function pointers in the middle of the coding
+ * process, but obviously it must be done carefully to make sure that the
+ * replacement `free' can deallocate memory allocated by the earlier
+ * `alloc' function(s).
+ */
+typedef struct {
+	/**
+	 * \brief       Pointer to custom memory allocation function
+	 *
+	 * Set this to point to your custom memory allocation function.
+	 * It can be useful for example if you want to limit how much
+	 * memory liblzma is allowed to use: for this, you may use
+	 * a pointer to lzma_memory_alloc().
+	 *
+	 * If you don't want a custom allocator, but still want
+	 * custom free(), set this to NULL and liblzma will use
+	 * the standard malloc().
+	 *
+	 * \param       opaque  lzma_allocator.opaque (see below)
+	 * \param       nmemb   Number of elements like in calloc().
+	 *                      liblzma will always set nmemb to 1.
+	 *                      This argument exists only for
+	 *                      compatibility with zlib and libbzip2.
+	 * \param       size    Size of an element in bytes.
+	 *                      liblzma never sets this to zero.
+	 *
+	 * \return      Pointer to the beginning of a memory block of
+	 *              size nmemb * size, or NULL if allocation fails
+	 *              for some reason. When allocation fails, functions
+	 *              of liblzma return LZMA_MEM_ERROR.
+	 */
+	void *(*alloc)(void *opaque, size_t nmemb, size_t size);
+
+	/**
+	 * \brief       Pointer to custom memory freeing function
+	 *
+	 * Set this to point to your custom memory freeing function.
+	 * If lzma_memory_alloc() is used as allocator, this should
+	 * be set to lzma_memory_free().
+	 *
+	 * If you don't want a custom freeing function, but still
+	 * want a custom allocator, set this to NULL and liblzma
+	 * will use the standard free().
+	 *
+	 * \param       opaque  lzma_allocator.opaque (see below)
+	 * \param       ptr     Pointer returned by
+	 *                      lzma_allocator.alloc(), or when it
+	 *                      is set to NULL, a pointer returned
+	 *                      by the standard malloc().
+	 */
+	void (*free)(void *opaque, void *ptr);
+
+	/**
+	 * \brief       Pointer passed to .alloc() and .free()
+	 *
+	 * opaque is passed as the first argument to lzma_allocator.alloc()
+	 * and lzma_allocator.free(). This intended to ease implementing
+	 * custom memory allocation functions for use with liblzma.
+	 *
+	 * When using lzma_memory_alloc() and lzma_memory_free(), opaque
+	 * must point to lzma_memory_limitter structure allocated and
+	 * initialized with lzma_memory_limitter_create().
+	 *
+	 * If you don't need this, you should set it to NULL.
+	 */
+	void *opaque;
+
+} lzma_allocator;
+
+
+/**
+ * \brief       Internal data structure
+ *
+ * The contents of this structure is not visible outside the library.
+ */
+typedef struct lzma_internal_s lzma_internal;
+
+
+/**
+ * \brief       Passing data to and from liblzma
+ *
+ * The lzma_stream structure is used for
+ *   - passing pointers to input and output buffers to liblzma;
+ *   - defining custom memory hander functions; and
+ *   - holding a pointer to coder-specific internal data structures.
+ *
+ * Before calling any of the lzma_*_init() functions the first time,
+ * the application must reset lzma_stream to LZMA_STREAM_INIT. The
+ * lzma_*_init() function will verify the options, allocate internal
+ * data structures and store pointer to them into `internal'. Finally
+ * total_in and total_out are reset to zero. In contrast to zlib,
+ * next_in and avail_in are ignored by the initialization functions.
+ *
+ * The actual coding is done with the lzma_code() function. Application
+ * must update next_in, avail_in, next_out, and avail_out between
+ * calls to lzma_decode() just like with zlib.
+ *
+ * In contrast to zlib, even the decoder requires that there always
+ * is at least one byte space in next_out; if avail_out == 0,
+ * LZMA_BUF_ERROR is returned immediatelly. This shouldn't be a problem
+ * for most applications that already use zlib, but it's still worth
+ * checking your application.
+ *
+ * Application may modify values of total_in and total_out as it wants.
+ * They are updated by liblzma to match the amount of data read and
+ * written, but liblzma doesn't use the values internally.
+ *
+ * Application must not touch the `internal' pointer.
+ */
+typedef struct {
+	uint8_t *next_in;   /**< Pointer to the next input byte. */
+	size_t avail_in;    /**< Number of available input bytes in next_in. */
+	uint64_t total_in;  /**< Total number of bytes read by liblzma. */
+
+	uint8_t *next_out;  /**< Pointer to the next output position. */
+	size_t avail_out;   /**< Amount of free space in next_out. */
+	uint64_t total_out; /**< Total number of bytes written by liblzma. */
+
+	/**
+	 * Custom memory allocation functions. Set to NULL to use
+	 * the standard malloc() and free().
+	 */
+	lzma_allocator *allocator;
+
+	/** Internal state is not visible to outsiders. */
+	lzma_internal *internal;
+
+} lzma_stream;
+
+
+/**
+ * \brief       Initialization for lzma_stream
+ *
+ * When you declare an instance of lzma_stream, you can immediatelly
+ * initialize it so that initialization functions know that no memory
+ * has been allocated yet:
+ *
+ *     lzma_stream strm = LZMA_STREAM_INIT;
+ */
+#define LZMA_STREAM_INIT { NULL, 0, 0, NULL, 0, 0, NULL, NULL }
+
+
+/**
+ * \brief       Initialization for lzma_stream
+ *
+ * This is like LZMA_STREAM_INIT, but this can be used when the lzma_stream
+ * has already been allocated:
+ *
+ *     lzma_stream *strm = malloc(sizeof(lzma_stream));
+ *     if (strm == NULL)
+ *         return LZMA_MEM_ERROR;
+ *     *strm = LZMA_STREAM_INIT_VAR;
+ */
+extern const lzma_stream LZMA_STREAM_INIT_VAR;
+
+
+/**
+ * \brief       Encodes or decodes data
+ *
+ * Once the lzma_stream has been successfully initialized (e.g. with
+ * lzma_stream_encoder_single()), the actual encoding or decoding is
+ * done using this function.
+ *
+ * \return      Some coders may have more exact meaning for different return
+ *              values, which are mentioned separately in the description of
+ *              the initialization functions. Here are the typical meanings:
+ *              - LZMA_OK: So far all good.
+ *              - LZMA_STREAM_END:
+ *                  - Encoder: LZMA_SYNC_FLUSH, LZMA_FULL_FLUSH, or
+ *                    LZMA_FINISH completed.
+ *                  - Decoder: End of uncompressed data was reached.
+ *              - LZMA_BUF_ERROR: Unable to progress. Provide more input or
+ *                output space, and call this function again. This cannot
+ *                occur if both avail_in and avail_out were non-zero (or
+ *                there's a bug in liblzma).
+ *              - LZMA_MEM_ERROR: Unable to allocate memory. Due to lazy
+ *                programming, the coding cannot continue even if the
+ *                application could free more memory. The next call must
+ *                be lzma_end() or some initialization function.
+ *              - LZMA_DATA_ERROR:
+ *                  - Encoder: Filter(s) cannot process the given data.
+ *                  - Decoder: Compressed data is corrupt.
+ *              - LZMA_HEADER_ERROR: Unsupported options. Rebuilding liblzma
+ *                with more features enabled or upgrading to a newer version
+ *                may help, although usually this is a sign of invalid options
+ *                (encoder) or corrupted input data (decoder).
+ *              - LZMA_PROG_ERROR: Invalid arguments or the internal state
+ *                of the coder is corrupt.
+ */
+extern lzma_ret lzma_code(lzma_stream *strm, lzma_action action);
+
+
+/**
+ * \brief       Frees memory allocated for the coder data structures
+ *
+ * \param       strm    Pointer to lzma_stream that is at least initialized
+ *                      with LZMA_STREAM_INIT.
+ *
+ * \note        zlib indicates an error if application end()s unfinished
+ *              stream. liblzma doesn't do this, and assumes that
+ *              application knows what it is doing.
+ */
+extern void lzma_end(lzma_stream *strm);
diff --git a/src/liblzma/api/lzma/block.h b/src/liblzma/api/lzma/block.h
new file mode 100644
index 00000000..210c1d87
--- /dev/null
+++ b/src/liblzma/api/lzma/block.h
@@ -0,0 +1,409 @@
+/**
+ * \file        lzma/block.h
+ * \brief       .lzma Block handling
+ *
+ * \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       Options for the Block Header encoder and decoder
+ *
+ * Different things use different parts of this structure. Some read
+ * some members, other functions write, and some do both. Only the
+ * members listed for reading need to be initialized when the specified
+ * functions are called. The members marked for writing will be assigned
+ * new values at some point either by calling the given function or by
+ * later calls to lzma_code().
+ */
+typedef struct {
+	/**
+	 * \brief       Type of integrity Check
+	 *
+	 * The type of the integrity Check is not stored into the Block
+	 * Header, thus its value must be provided also when decoding.
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_check_type check;
+
+	/**
+	 * \brief       Precense of CRC32 of the Block Header
+	 *
+	 * Set this to true if CRC32 of the Block Header should be
+	 * calculated and stored in the Block Header.
+	 *
+	 * There is no way to autodetect if CRC32 is present in the Block
+	 * Header, thus this information must be provided also when decoding.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 *  - lzma_block_header_decoder()
+	 */
+	lzma_bool has_crc32;
+
+	/**
+	 * \brief       Usage of End of Payload Marker
+	 *
+	 * If this is true, End of Payload Marker is used even if
+	 * Uncompressed Size is known.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_encoder()
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder()
+	 */
+	lzma_bool has_eopm;
+
+	/**
+	 * \brief       True if the Block is a Metadata Block
+	 *
+	 * If this is true, the Metadata bit will be set in the Block Header.
+	 * It is up to the application to store correctly formatted data
+	 * into Metadata Block.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_encoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder()
+	 */
+	lzma_bool is_metadata;
+
+	/**
+	 * \brief       True if Uncompressed Size is in Block Footer
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_bool has_uncompressed_size_in_footer;
+
+	/**
+	 * \brief       True if Backward Size is in Block Footer
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_bool has_backward_size;
+
+	/**
+	 * \brief       True if Block coder should take care of Padding
+	 *
+	 * In liblzma, Stream decoder sets this to true when decoding
+	 * Header Metadata Block or Data Blocks from Multi-Block Stream,
+	 * and to false when decoding Single-Block Stream or Footer
+	 * Metadata Block from a Multi-Block Stream.
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_bool handle_padding;
+
+	/**
+	 * \brief       Size of the Compressed Data in bytes
+	 *
+	 * Usually you don't know this value when encoding in streamed mode.
+	 * In non-streamed mode you can reserve space for this field when
+	 * encoding the Block Header the first time, and then re-encode the
+	 * Block Header and copy it over the original one after the encoding
+	 * of the Block has been finished.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder()
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_vli compressed_size;
+
+	/**
+	 * \brief       Uncompressed Size in bytes
+	 *
+	 * Encoder: If this value is not LZMA_VLI_VALUE_UNKNOWN, it is stored
+	 * to the Uncompressed Size field in the Block Header. The real
+	 * uncompressed size of the data being compressed must match
+	 * the Uncompressed Size or LZMA_HEADER_ERROR is returned.
+	 *
+	 * If Uncompressed Size is unknown, End of Payload Marker must
+	 * be used. If uncompressed_size == LZMA_VLI_VALUE_UNKNOWN and
+	 * has_eopm == 0, LZMA_HEADER_ERROR will be returned.
+	 *
+	 * Decoder: If this value is not LZMA_VLI_VALUE_UNKNOWN, it is
+	 * compared to the real Uncompressed Size. If they do not match,
+	 * LZMA_HEADER_ERROR is returned.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder()
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       Number of bytes to reserve for Compressed Size
+	 *
+	 * This is useful if you want to be able to store the Compressed Size
+	 * to the Block Header, but you don't know it when starting to encode.
+	 * Setting this to non-zero value at maximum of LZMA_VLI_BYTES_MAX,
+	 * the Block Header encoder will force the Compressed Size field to
+	 * occupy specified number of bytes. You can later rewrite the Block
+	 * Header to contain correct information by using otherwise identical
+	 * lzma_options_block structure except the correct compressed_size.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder()
+	 */
+	uint32_t compressed_reserve;
+
+	/**
+	 * \brief       Number of bytes to reserve for Uncompressed Size
+	 *
+	 * See the description of compressed_size above.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder()
+	 */
+	uint32_t uncompressed_reserve;
+
+	/**
+	 * \brief       Total Size of the Block in bytes
+	 *
+	 * This is useful in the decoder, which can verify the Total Size
+	 * if it is known from Index.
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_vli total_size;
+
+	/**
+	 * \brief       Upper limit of Total Size
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_vli total_limit;
+
+	/**
+	 * \brief       Upper limit of Uncompressed Size
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 */
+	lzma_vli uncompressed_limit;
+
+	/**
+	 * \brief       Array of filters
+	 *
+	 * There can be at maximum of seven filters. The end of the array
+	 * is marked with .id = LZMA_VLI_VALUE_UNKNOWN. Minimum number of
+	 * filters is zero; in that case, an implicit Copy filter is used.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_decoder(): Note that this does NOT free()
+	 *    the old filter options structures. If decoding fails, the
+	 *    caller must take care of freeing the options structures
+	 *    that may have been allocated and decoded before the error
+	 *    occurred.
+	 */
+	lzma_options_filter filters[8];
+
+	/**
+	 * \brief       Size of the Padding field
+	 *
+	 * The Padding field exist to allow aligning the Compressed Data field
+	 * optimally in the Block. See lzma_options_stream.alignment in
+	 * stream.h for more information.
+	 *
+	 * If you want the Block Header encoder to automatically calculate
+	 * optimal size for the Padding field by looking at the information
+	 * in filters[], set this to LZMA_BLOCK_HEADER_PADDING_AUTO. In that
+	 * case, you must also set the aligmnet variable to tell the the
+	 * encoder the aligmnet of the beginning of the Block Header.
+	 *
+	 * The decoder never sets this to LZMA_BLOCK_HEADER_PADDING_AUTO.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder(): Note that this doesn't
+	 *    accept LZMA_BLOCK_HEADER_PADDING_AUTO.
+	 *
+	 * Written by (these never set padding to
+	 * LZMA_BLOCK_HEADER_PADDING_AUTO):
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_decoder()
+	 */
+	int32_t padding;
+#	define LZMA_BLOCK_HEADER_PADDING_AUTO (-1)
+#	define LZMA_BLOCK_HEADER_PADDING_MIN 0
+#	define LZMA_BLOCK_HEADER_PADDING_MAX 31
+
+	/**
+	 * \brief       Alignment of the beginning of the Block Header
+	 *
+	 * This variable is read only if padding has been set to
+	 * LZMA_BLOCK_HEADER_PADDING_AUTO.
+	 *
+	 * Read by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_encoder()
+	 */
+	uint32_t alignment;
+
+	/**
+	 * \brief       Size of the Block Header
+	 *
+	 * Read by:
+	 *  - lzma_block_encoder()
+	 *  - lzma_block_decoder()
+	 *
+	 * Written by:
+	 *  - lzma_block_header_size()
+	 *  - lzma_block_header_decoder()
+	 */
+	uint32_t header_size;
+
+} lzma_options_block;
+
+
+/**
+ * \brief       Calculates the size of Header Padding and Block Header
+ *
+ * \return      - LZMA_OK: Size calculated successfully and stored to
+ *                options->header_size.
+ *              - LZMA_HEADER_ERROR: Unsupported filters or filter options.
+ *              - LZMA_PROG_ERROR: Invalid options
+ *
+ * \note        This doesn't check that all the options are valid i.e. this
+ *              may return LZMA_OK even if lzma_block_header_encode() or
+ *              lzma_block_encoder() would fail.
+ */
+extern lzma_ret lzma_block_header_size(lzma_options_block *options);
+
+
+/**
+ * \brief       Encodes Block Header
+ *
+ * Encoding of the Block options is done with a single call instead of
+ * first initializing and then doing the actual work with lzma_code().
+ *
+ * \param       out         Beginning of the output buffer. This must be
+ *                          at least options->header_size bytes.
+ * \param       options     Block options to be encoded.
+ *
+ * \return      - LZMA_OK: Encoding was successful. options->header_size
+ *                bytes were written to output buffer.
+ *              - LZMA_HEADER_ERROR: Invalid or unsupported options.
+ *              - LZMA_PROG_ERROR
+ */
+extern lzma_ret lzma_block_header_encode(
+		uint8_t *out, const lzma_options_block *options);
+
+
+/**
+ * \brief       Initializes Block Header decoder
+ *
+ * Because the results of this decoder are placed into *options,
+ * strm->next_in, strm->avail_in, and strm->total_in are not used.
+ *
+ * The only valid `action' with lzma_code() is LZMA_RUN.
+ *
+ * \return      - LZMA_OK: Encoding was successful. options->header_size
+ *                bytes were written to output buffer.
+ *              - LZMA_HEADER_ERROR: Invalid or unsupported options.
+ *              - LZMA_PROG_ERROR
+ */
+extern lzma_ret lzma_block_header_decoder(
+		lzma_stream *strm, lzma_options_block *options);
+
+
+/**
+ * \brief       Initializes .lzma Block encoder
+ *
+ * This function is required for multi-thread encoding. It may also be
+ * useful when implementing custom file formats.
+ *
+ * \return      - LZMA_OK: All good, continue with lzma_code().
+ *              - LZMA_MEM_ERROR
+ *              - LZMA_HEADER_ERROR
+ *              - LZMA_DATA_ERROR: Limits (total_limit and uncompressed_limit)
+ *                have been reached already.
+ *              - LZMA_UNSUPPORTED_CHECK: options->check specfies a Check
+ *                that is not supported by this buid of liblzma. Initializing
+ *                the encoder failed.
+ *              - LZMA_PROG_ERROR
+ *
+ * lzma_code() can return FIXME
+ */
+extern lzma_ret lzma_block_encoder(
+		lzma_stream *strm, lzma_options_block *options);
+
+
+/**
+ * \brief       Initializes decoder for .lzma Block
+ *
+ * \return      - LZMA_OK: All good, continue with lzma_code().
+ *              - LZMA_UNSUPPORTED_CHECK: Initialization was successful, but
+ *                the given Check type is not supported, thus Check will be
+ *                ignored.
+ *              - LZMA_PROG_ERROR
+ *              - LZMA_MEM_ERROR
+ */
+extern lzma_ret lzma_block_decoder(
+		lzma_stream *strm, lzma_options_block *options);
diff --git a/src/liblzma/api/lzma/check.h b/src/liblzma/api/lzma/check.h
new file mode 100644
index 00000000..4a2a453b
--- /dev/null
+++ b/src/liblzma/api/lzma/check.h
@@ -0,0 +1,128 @@
+/**
+ * \file        lzma/check.h
+ * \brief       Integrity checks
+ *
+ * \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       Type of the Check
+ *
+ * The .lzma format supports multiple types of Checks that are calculated
+ * from the uncompressed data (unless it is empty; then it's calculated
+ * from Block Header).
+ */
+typedef enum {
+	LZMA_CHECK_NONE     = 0,
+		/**<
+		 * No Check is calculated.
+		 *
+		 * Size of the Check field: 0 bytes
+		 */
+
+	LZMA_CHECK_CRC32    = 1,
+		/**<
+		 * CRC32 using the polynomial from the IEEE 802.3 standard
+		 *
+		 * Size of the Check field: 4 bytes
+		 */
+
+	LZMA_CHECK_CRC64    = 3,
+		/**<
+		 * CRC64 using the polynomial from the ECMA-182 standard
+		 *
+		 * Size of the Check field: 8 bytes
+		 */
+
+	LZMA_CHECK_SHA256   = 5
+		/**<
+		 * SHA-256
+		 *
+		 * Size of the Check field: 32 bytes
+		 */
+} lzma_check_type;
+
+
+/**
+ * \brief       Maximum valid Check ID
+ *
+ * The .lzma file format specification specifies eight Check IDs (0-7). Some
+ * of them are only reserved i.e. no actual Check algorithm has been assigned.
+ * Still liblzma accepts any of these eight IDs for future compatibility
+ * when decoding files. If a valid but unsupported Check ID is detected,
+ * liblzma indicates a warning with LZMA_UNSUPPORTED_CHECK.
+ *
+ * FIXME bad desc
+ */
+#define LZMA_CHECK_ID_MAX 7
+
+
+/**
+ * \brief       Check IDs supported by this liblzma build
+ *
+ * If lzma_available_checks[n] is true, the Check ID n is supported by this
+ * liblzma build. You can assume that LZMA_CHECK_NONE and LZMA_CHECK_CRC32
+ * are always available.
+ */
+extern const lzma_bool lzma_available_checks[LZMA_CHECK_ID_MAX + 1];
+
+
+/**
+ * \brief       Size of the Check field with different Check IDs
+ *
+ * Although not all Check IDs have a check algorithm associated, the size of
+ * every Check is already frozen. This array contains the size (in bytes) of
+ * the Check field with specified Check ID. The values are taken from the
+ * section 2.2.2 of the .lzma file format specification:
+ * { 0, 4, 4, 8, 16, 32, 32, 64 }
+ */
+extern const uint32_t lzma_check_sizes[LZMA_CHECK_ID_MAX + 1];
+
+
+/**
+ * \brief       Calculate CRC32
+ *
+ * Calculates CRC32 using the polynomial from the IEEE 802.3 standard.
+ *
+ * \param       buf     Pointer to the input buffer
+ * \param       size    Size of the input buffer
+ * \param       crc     Previously returned CRC value. This is used to
+ *                      calculate the CRC of a big buffer in smaller chunks.
+ *                      Set to zero when there is no previous value.
+ *
+ * \return      Updated CRC value, which can be passed to this function
+ *              again to continue CRC calculation.
+ */
+extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc);
+
+
+/**
+ * \brief       Calculate CRC64
+ *
+ * Calculates CRC64 using the polynomial from the ECMA-182 standard.
+ *
+ * This function is used similarly to lzma_crc32(). See its documentation.
+ */
+extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc);
+
+
+/*
+ * SHA256 functions are currently not exported to public API.
+ * Contact the author if you think it should be.
+ */
diff --git a/src/liblzma/api/lzma/copy.h b/src/liblzma/api/lzma/copy.h
new file mode 100644
index 00000000..f5617462
--- /dev/null
+++ b/src/liblzma/api/lzma/copy.h
@@ -0,0 +1,29 @@
+/**
+ * \file        lzma/copy.h
+ * \brief       Copy filter
+ *
+ * \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       Filter ID
+ *
+ * Filter ID of the Copy filter. This is used as lzma_options_filter.id.
+ */
+#define LZMA_FILTER_COPY        LZMA_VLI_C(0x00)
diff --git a/src/liblzma/api/lzma/delta.h b/src/liblzma/api/lzma/delta.h
new file mode 100644
index 00000000..58afec18
--- /dev/null
+++ b/src/liblzma/api/lzma/delta.h
@@ -0,0 +1,49 @@
+/**
+ * \file        lzma/delta.h
+ * \brief       Delta filter
+ *
+ * \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       Filter ID
+ *
+ * Filter ID of the Delta filter. This is used as lzma_options_filter.id.
+ */
+#define LZMA_FILTER_DELTA       LZMA_VLI_C(0x20)
+
+
+/**
+ * \brief       Options for the Delta filter
+ *
+ * These options are needed by both encoder and decoder.
+ */
+typedef struct {
+	/**
+	 * \brief       Delta distance as bytes
+	 *
+	 * Examples:
+	 *  - 16-bit stereo audio: distance = 4 bytes
+	 *  - 24-bit RGB image data: distance = 3 bytes
+	 */
+	uint32_t distance;
+#	define LZMA_DELTA_DISTANCE_MIN 1
+#	define LZMA_DELTA_DISTANCE_MAX 256
+
+} lzma_options_delta;
diff --git a/src/liblzma/api/lzma/extra.h b/src/liblzma/api/lzma/extra.h
new file mode 100644
index 00000000..29426a74
--- /dev/null
+++ b/src/liblzma/api/lzma/extra.h
@@ -0,0 +1,114 @@
+/**
+ * \file        lzma/extra.h
+ * \brief       Handling of Extra Records in Metadata
+ *
+ * \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
+
+
+/*
+ * Extra Record IDs
+ *
+ * See the .lzma file format specification for description what each
+ * Extra Record type exactly means.
+ *
+ * If you ever need to update .lzma files with Extra Records, note that
+ * the Record IDs are divided in two categories:
+ *  - Safe-to-Copy Records may be preserved as is when the
+ *    Stream is modified in ways that don't change the actual
+ *    uncompressed data. Examples of such operatings include
+ *    recompressing and adding, modifying, or deleting unrelated
+ *    Extra Records.
+ *  - Unsafe-to-Copy Records should be removed (and possibly
+ *    recreated) when any kind of changes are made to the Stream.
+ */
+
+#define LZMA_EXTRA_PADDING      0x00
+#define LZMA_EXTRA_OPENPGP      0x01
+#define LZMA_EXTRA_FILTERS      0x02
+#define LZMA_EXTRA_COMMENT      0x03
+#define LZMA_EXTRA_CHECKS       0x04
+#define LZMA_EXTRA_FILENAME     0x05
+#define LZMA_EXTRA_MTIME        0x07
+#define LZMA_EXTRA_MTIME_HR     0x09
+#define LZMA_EXTRA_MIME_TYPE    0x0B
+#define LZMA_EXTRA_HOMEPAGE     0x0D
+
+
+/**
+ * \brief       Extra Records
+ *
+ * The .lzma format provides a way to store custom information along
+ * the actual compressed content. Information about these Records
+ * are passed to and from liblzma via this linked list.
+ */
+typedef struct lzma_extra_s lzma_extra;
+struct lzma_extra_s {
+	/**
+	 * \brief       Pointer to the next Extra Record
+	 *
+	 * This is NULL on the last Extra Record.
+	 */
+	lzma_extra *next;
+
+	/**
+	 * \brief       Record ID
+	 *
+	 * Extra Record IDs are divided in three categories:
+	 *   - Zero is a special case used for padding. It doesn't have
+	 *     Size of Data fields.
+	 *   - Odd IDs (1, 3, 5, ...) are Safe-to-Copy IDs.
+	 *     These can be preserved as is if the Stream is
+	 *     modified in a way that doesn't alter the actual
+	 *     uncompressed content.
+	 *   - Even IDs (2, 4, 6, ...) are Unsafe-to-Copy IDs.
+	 *     If the .lzma Stream is modified in any way,
+	 *     the Extra Records having a sensitive ID should
+	 *     be removed or updated accordingly.
+	 *
+	 * Refer to the .lzma file format specification for
+	 * the up to date list of Extra Record IDs.
+	 */
+	lzma_vli id;
+
+	/**
+	 * \brief       Size of the Record data
+	 *
+	 * In case of strings, this should not include the
+	 * trailing '\0'.
+	 */
+	size_t size;
+
+	/**
+	 * \brief       Record data
+	 *
+	 * Record data is often a string in UTF-8 encoding,
+	 * but it can be arbitrary binary data. In case of
+	 * strings, the trailing '\0' is usually not stored
+	 * in the .lzma file.
+	 *
+	 * To ease working with Extra Records containing strings,
+	 * liblzma always adds '\0' to the end of data even when
+	 * it wasn't present in the .lzma file. This '\0' is not
+	 * counted in the size of the data.
+	 */
+	uint8_t *data;
+};
+
+
+extern void lzma_extra_free(lzma_extra *extra, lzma_allocator *allocator);
diff --git a/src/liblzma/api/lzma/filter.h b/src/liblzma/api/lzma/filter.h
new file mode 100644
index 00000000..a8bdd4bd
--- /dev/null
+++ b/src/liblzma/api/lzma/filter.h
@@ -0,0 +1,166 @@
+/**
+ * \file        lzma/filter.h
+ * \brief       Common filter related types
+ *
+ * \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       Filter options
+ *
+ * This structure is used to pass Filter ID and a pointer filter's options
+ * to liblzma.
+ */
+typedef struct {
+	/**
+	 * \brief       Filter ID
+	 *
+	 * Use constants whose name begin with `LZMA_FILTER_' to specify
+	 * different filters. In an array of lzma_option_filter structures,
+	 * use LZMA_VLI_VALUE_UNKNOWN to indicate end of filters.
+	 */
+	lzma_vli id;
+
+	/**
+	 * \brief       Pointer to filter-specific options structure
+	 *
+	 * If the filter doesn't need options, set this to NULL. If id is
+	 * set to LZMA_VLI_VALUE_UNKNOWN, options is ignored, and thus
+	 * doesn't need be initialized.
+	 *
+	 * Some filters support changing the options in the middle of
+	 * the encoding process. These filters store the pointer of the
+	 * options structure and communicate with the application via
+	 * modifications of the options structure.
+	 */
+	void *options;
+
+} lzma_options_filter;
+
+
+/**
+ * \brief       Filters available for encoding
+ *
+ * Pointer to an array containing the list of available Filter IDs that
+ * can be used for encoding. The last element is LZMA_VLI_VALUE_UNKNOWN.
+ *
+ * If lzma_available_filter_encoders[0] == LZMA_VLI_VALUE_UNKNOWN, the
+ * encoder components haven't been built at all. This means that the
+ * encoding-specific functions are probably missing from the library
+ * API/ABI completely.
+ */
+extern const lzma_vli *const lzma_available_filter_encoders;
+
+
+/**
+ * \brief       Filters available for decoding
+ *
+ * Pointer to an array containing the list of available Filter IDs that
+ * can be used for decoding. The last element is LZMA_VLI_VALUE_UNKNOWN.
+ *
+ * If lzma_available_filter_decoders[0] == LZMA_VLI_VALUE_UNKNOWN, the
+ * decoder components haven't been built at all. This means that the
+ * decoding-specific functions are probably missing from the library
+ * API/ABI completely.
+ */
+extern const lzma_vli *const lzma_available_filter_decoders;
+
+
+/**
+ * \brief       Calculate rough memory requirements for given filter chain
+ *
+ * \param       filters     Array of filters terminated with
+ *                          .id == LZMA_VLI_VALUE_UNKNOWN.
+ * \param       is_encoder  Set to true when calculating memory requirements
+ *                          of an encoder; false for decoder.
+ *
+ * \return      Number of mebibytes (MiB i.e. 2^20) required for the given
+ *              encoder or decoder filter chain.
+ *
+ * \note        If calculating memory requirements of encoder, lzma_init() or
+ *              lzma_init_encoder() must have been called earlier. Similarly,
+ *              if calculating memory requirements of decoder, lzma_init() or
+ *              lzma_init_decoder() must have been called earlier.
+ */
+extern uint32_t lzma_memory_usage(
+		const lzma_options_filter *filters, lzma_bool is_encoder);
+
+
+/**
+ * \brief       Calculates encoded size of a Filter Flags field
+ *
+ * Knowing the size of Filter Flags is useful to know when allocating
+ * memory to hold the encoded Filter Flags.
+ *
+ * \param       size    Pointer to integer to hold the calculated size
+ * \param       options Filter ID and associated options whose encoded
+ *                      size is to be calculted
+ *
+ * \return      - LZMA_OK: *size set successfully. Note that this doesn't
+ *                guarantee that options->options is valid, thus
+ *                lzma_filter_flags_encode() may still fail.
+ *              - LZMA_HEADER_ERROR: Unknown Filter ID or unsupported options.
+ *              - LZMA_PROG_ERROR: Invalid options
+ *
+ * \note        If you need to calculate size of List of Filter Flags,
+ *              you need to loop over every lzma_options_filter entry.
+ */
+extern lzma_ret lzma_filter_flags_size(
+		uint32_t *size, const lzma_options_filter *options);
+
+
+/**
+ * \brief       Encodes Filter Flags into given buffer
+ *
+ * In contrast to some functions, this doesn't allocate the needed buffer.
+ * This is due to how this function is used internally by liblzma.
+ *
+ * \param       out         Beginning of the output buffer
+ * \param       out_pos     out[*out_pos] is the next write position. This
+ *                          is updated by the encoder.
+ * \param       out_size    out[out_size] is the first byte to not write.
+ * \param       options     Filter options to be encoded
+ *
+ * \return      - LZMA_OK: Encoding was successful.
+ *              - LZMA_HEADER_ERROR: Invalid or unsupported options.
+ *              - LZMA_PROG_ERROR: Invalid options or not enough output
+ *                buffer space (you should have checked it with
+ *                lzma_filter_flags_size()).
+ */
+extern lzma_ret lzma_filter_flags_encode(uint8_t *out, size_t *out_pos,
+		size_t out_size, const lzma_options_filter *options);
+
+
+/**
+ * \brief       Initializes Filter Flags decoder
+ *
+ * The decoded result is stored into *options. options->options is
+ * initialized but the old value is NOT free()d.
+ *
+ * Because the results of this decoder are placed into *options,
+ * strm->next_in, strm->avail_in, and strm->total_in are not used
+ * when calling lzma_code(). The only valid action for lzma_code()
+ * is LZMA_RUN
+ *
+ * \return      - LZMA_OK
+ *              - LZMA_MEM_ERROR
+ *              - LZMA_PROG_ERROR
+ */
+extern lzma_ret lzma_filter_flags_decoder(
+		lzma_stream *strm, lzma_options_filter *options);
diff --git a/src/liblzma/api/lzma/index.h b/src/liblzma/api/lzma/index.h
new file mode 100644
index 00000000..7e59c4b3
--- /dev/null
+++ b/src/liblzma/api/lzma/index.h
@@ -0,0 +1,84 @@
+/**
+ * \file        lzma/index.h
+ * \brief       Handling of Index lists
+ *
+ * \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
+ *
+ * FIXME desc
+ */
+typedef struct lzma_index_s lzma_index;
+struct lzma_index_s {
+	/**
+	 * \brief       Total Size of the Block
+	 *
+	 * This includes Block Header, Compressed Data, and Block Footer.
+	 */
+	lzma_vli total_size;
+
+	/**
+	 * \brief       Uncompressed Size of the Block
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       Pointer to the next Index Record
+	 *
+	 * This is NULL on the last Index Record.
+	 */
+	lzma_index *next;
+};
+
+
+/**
+ * \brief       Duplicates an Index list
+ *
+ * \return      A copy of the Index list, or NULL if memory allocation
+ *              failed or the original Index was empty.
+ */
+extern lzma_index *lzma_index_dup(
+		const lzma_index *index, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Frees an Index list
+ *
+ * All Index Recors in the list are freed. This function is convenient when
+ * getting rid of lzma_metadata structures containing an Index.
+ */
+extern void lzma_index_free(lzma_index *index, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Calculates information about the Index
+ *
+ * \return      LZMA_OK on success, LZMA_PROG_ERROR on error. FIXME
+ */
+extern lzma_ret lzma_index_count(const lzma_index *index, size_t *count,
+		lzma_vli *lzma_restrict total_size,
+		lzma_vli *lzma_restrict uncompressed_size);
+
+
+/**
+ * \brief       Compares if two Index lists are identical
+ */
+extern lzma_bool lzma_index_is_equal(const lzma_index *a, const lzma_index *b);
diff --git a/src/liblzma/api/lzma/info.h b/src/liblzma/api/lzma/info.h
new file mode 100644
index 00000000..3a91850f
--- /dev/null
+++ b/src/liblzma/api/lzma/info.h
@@ -0,0 +1,315 @@
+/**
+ * \file        lzma/info.h
+ * \brief       Handling of Stream size information
+ *
+ * \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
+
+
+/**********
+ * Basics *
+ **********/
+
+/**
+ * \brief       Opaque data type to hold the size information
+ */
+typedef struct lzma_info_s lzma_info;
+
+
+typedef struct {
+	/**
+	 * \brief       Total Size of this Block
+	 *
+	 * This can be LZMA_VLI_VALUE_UNKNOWN.
+	 */
+	lzma_vli total_size;
+
+	/**
+	 * \brief       Uncompressed Size of this Block
+	 *
+	 * This can be LZMA_VLI_VALUE_UNKNOWN.
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       Offset of the first byte of the Block
+	 *
+	 * In encoder, this is useful to find out the alignment of the Block.
+	 *
+	 * In decoder, this is useful when doing random-access reading
+	 * with help from lzma_info_data_locate().
+	 */
+	lzma_vli stream_offset;
+
+	/**
+	 * \brief       Uncompressed offset of the Block
+	 *
+	 * Offset of the first uncompressed byte of the Block relative to
+	 * all uncompressed data in the Block.
+	 * FIXME desc
+	 */
+	lzma_vli uncompressed_offset;
+
+	/**
+	 * \brief       Pointers to internal data structures
+	 *
+	 * Applications must not touch these.
+	 */
+	void *internal[4];
+
+} lzma_info_iter;
+
+
+typedef enum {
+	LZMA_INFO_STREAM_START,
+	LZMA_INFO_HEADER_METADATA,
+	LZMA_INFO_TOTAL,
+	LZMA_INFO_UNCOMPRESSED,
+	LZMA_INFO_FOOTER_METADATA
+} lzma_info_size;
+
+
+/**
+ * \brief       Allocates and initializes a new lzma_info structure
+ *
+ * If info is NULL, a new lzma_info structure is allocated, initialized, and
+ * a pointer to it returned. If allocation fails, NULL is returned.
+ *
+ * If info is non-NULL, it is reinitialized and the same pointer returned.
+ * (In this case, return value cannot be NULL or a different pointer than
+ * the info given as argument.)
+ */
+extern lzma_info *lzma_info_init(lzma_info *info, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Resets lzma_info
+ *
+ * This is like calling lzma_info_end() and lzma_info_create(), but
+ * re-uses the existing base structure.
+ */
+extern void lzma_info_reset(
+		lzma_info *info, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Frees memory allocated for a lzma_info structure
+ */
+extern void lzma_info_free(lzma_info *info, lzma_allocator *allocator);
+
+
+/************************
+ * Setting known values *
+ ************************/
+
+/**
+ * \brief       Set a known size value
+ *
+ * \param       info    Pointer returned by lzma_info_create()
+ * \param       type    Any value from lzma_info_size
+ * \param       size    Value to set or verify
+ *
+ * \return      LZMA_OK on success, LZMA_DATA_ERROR if the size doesn't
+ *              match the existing information, or LZMA_PROG_ERROR
+ *              if type is invalid or size is not a valid VLI.
+ */
+extern lzma_ret lzma_info_size_set(
+		lzma_info *info, lzma_info_size type, lzma_vli size);
+
+
+/**
+ * \brief       Sets the Index
+ *
+ * The given lzma_index list is "absorbed" by this function. The application
+ * must not access it after this function call, even if this function returns
+ * an error.
+ *
+ * \note        The given lzma_index will at some point get freed by the
+ *              lzma_info_* functions. If you use a custom lzma_allocator,
+ *              make sure that it can free the lzma_index.
+ */
+extern lzma_ret lzma_info_index_set(
+		lzma_info *info, lzma_allocator *allocator,
+		lzma_index *index, lzma_bool eat_index);
+
+
+/**
+ * \brief       Sets information from a known Metadata Block
+ *
+ * This is a shortcut for calling lzma_info_size_set() with different type
+ * arguments, lzma_info_index_set() with metadata->index.
+ */
+extern lzma_ret lzma_info_metadata_set(lzma_info *info,
+		lzma_allocator *allocator, lzma_metadata *metadata,
+		lzma_bool is_header_metadata, lzma_bool eat_index);
+
+
+/***************
+ * Incremental *
+ ***************/
+
+/**
+ * \brief       Prepares an iterator to be used with given lzma_info structure
+ *
+ *
+ */
+extern void lzma_info_iter_begin(lzma_info *info, lzma_info_iter *iter);
+
+
+/**
+ * \brief       Moves to the next Index Record
+ *
+ *
+ */
+extern lzma_ret lzma_info_iter_next(
+		lzma_info_iter *iter, lzma_allocator *allocator);
+
+
+/**
+ * \brief       Sets or verifies the sizes in the Index Record
+ *
+ * \param       iter    Pointer to iterator to be set or verified
+ * \param       total_size
+ *                      Total Size in bytes or LZMA_VLI_VALUE_UNKNOWN
+ * \param       uncompressed_size
+ *                      Uncompressed Size or LZMA_VLI_VALUE_UNKNOWN
+ *
+ * \return      - LZMA_OK: All OK.
+ *              - LZMA_DATA_ERROR: Given sizes don't match with the already
+ *                known sizes.
+ *              - LZMA_PROG_ERROR: Internal error, possibly integer
+ *                overflow (e.g. the sum of all the known sizes is too big)
+ */
+extern lzma_ret lzma_info_iter_set(lzma_info_iter *iter,
+		lzma_vli total_size, lzma_vli uncompressed_size);
+
+
+/**
+ * \brief       Locates a Data Block
+ *
+ * \param       iter        Properly initialized iterator
+ * \param       allocator   Pointer to lzma_allocator or NULL
+ * \param       uncompressed_offset
+ *                          Target offset to locate. The final offset
+ *                          will be equal or smaller than this.
+ * \param       allow_alloc True if this function is allowed to call
+ *                          lzma_info_iter_next() to allocate a new Record
+ *                          if the requested offset reached end of Index
+ *                          Record list. Note that if Index has been marked
+ *                          final, lzma_info_iter_next() is never called.
+ *
+ * \return      - LZMA_OK: All OK, *iter updated accordingly.
+ *              - LZMA_DATA_ERROR: Trying to search past the end of the Index
+ *                Record list, and allocating a new Record was not allowed
+ *                either because allow_alloc was false or Index was final.
+ *              - LZMA_PROG_ERROR: Internal error (probably integer
+ *                overflow causing some lzma_vli getting too big).
+ */
+extern lzma_ret lzma_info_iter_locate(lzma_info_iter *iter,
+		lzma_allocator *allocator, lzma_vli uncompressed_offset,
+		lzma_bool allow_alloc);
+
+
+/**
+ * \brief       Finishes incrementally constructed Index
+ *
+ * This sets the known Total Size and Uncompressed of the Data Blocks
+ * based on the information collected from the Index Records, and marks
+ * the Index as final.
+ */
+extern lzma_ret lzma_info_index_finish(lzma_info *info);
+
+
+/***************************
+ * Reading the information *
+ ***************************/
+
+/**
+ * \brief       Gets a known size
+ *
+ *
+ */
+extern lzma_vli lzma_info_size_get(
+		const lzma_info *info, lzma_info_size type);
+
+extern lzma_vli lzma_info_metadata_locate(
+		const lzma_info *info, lzma_bool is_header_metadata);
+
+/**
+ * \brief       Gets a pointer to the beginning of the Index list
+ *
+ * If detach is true, the Index will be detached from the lzma_info
+ * structure, and thus not be modified or freed by lzma_info_end().
+ *
+ * If detach is false, the application must not modify the Index in any way.
+ * Also, the Index list is guaranteed to be valid only till the next call
+ * to any lzma_info_* function.
+ */
+extern lzma_index *lzma_info_index_get(lzma_info *info, lzma_bool detach);
+
+
+extern size_t lzma_info_index_count_get(const lzma_info *info);
+
+
+extern uint32_t lzma_info_metadata_alignment_get(
+		const lzma_info *info, lzma_bool is_header_metadata);
+
+
+
+/**
+ * \brief       Locate a Block containing the given uncompressed offset
+ *
+ * This function is useful when you need to do random-access reading in
+ * a Multi-Block Stream.
+ *
+ * \param       info    Pointer to lzma_info that has at least one
+ *                      Index Record. The Index doesn't need to be finished.
+ * \param       uncompressed_target
+ *                      Uncompressed target offset which the caller would
+ *                      like to locate from the Stream.
+ * \param       stream_offset
+ *                      Starting offset (relative to the beginning the Stream)
+ *                      of the Block containing the requested location.
+ * \param       uncompressed_offset
+ *                      The actual uncompressed offset of the beginning of
+ *                      the Block. uncompressed_offset <= uncompressed_target
+ *                      is always true; the application needs to uncompress
+ *                      uncompressed_target - uncompressed_offset bytes to
+ *                      reach the requested target offset.
+ * \param       total_size
+ *                      Total Size of the Block. If the Index is incomplete,
+ *                      this may be LZMA_VLI_VALUE_UNKNOWN indicating unknown
+ *                      size.
+ * \param       uncompressed_size
+ *                      Uncompressed Size of the Block. If the Index is
+ *                      incomplete, this may be LZMA_VLI_VALUE_UNKNOWN
+ *                      indicating unknown size. The application must pass
+ *                      this value to the Block decoder to verify FIXME
+ *
+ * \return
+ *
+ * \note        This function is currently implemented as a linear search.
+ *              If there are many Index Records, this can be really slow.
+ *              This can be improved in newer liblzma versions if needed.
+ */
+extern lzma_bool lzma_info_data_locate(const lzma_info *info,
+		lzma_vli uncompressed_target,
+		lzma_vli *lzma_restrict stream_offset,
+		lzma_vli *lzma_restrict uncompressed_offset,
+		lzma_vli *lzma_restrict total_size,
+		lzma_vli *lzma_restrict uncompressed_size);
diff --git a/src/liblzma/api/lzma/init.h b/src/liblzma/api/lzma/init.h
new file mode 100644
index 00000000..f7b79246
--- /dev/null
+++ b/src/liblzma/api/lzma/init.h
@@ -0,0 +1,85 @@
+/**
+ * \file        lzma/init.h
+ * \brief       Initializations
+ *
+ * \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       Initialize all internal static variables
+ *
+ * Depending on the build options, liblzma may have some internal static
+ * variables, that must be initialized before using any other part of
+ * the library (*). It is recommended to do these initializations in the very
+ * beginning of the application by calling appropriate initialization function.
+ *
+ * (*) There are some exceptions to this rule. FIXME
+ *
+ * The initialization functions are not necessarily thread-safe, thus the
+ * required initializations must be done before creating any threads. (The
+ * rest of the functions of liblzma are thread-safe.) Calling the
+ * initialization functions multiple times does no harm, although it
+ * still shouldn't be done when there are multiple threads running.
+ *
+ * lzma_init() initializes all internal static variables by calling
+ * lzma_lzma_init_encoder() and lzma_init_decoder().
+ *
+ * If you need only encoder, decoder, or neither-encoder-nor-decoder
+ * functions, you may use other initialization functions, which initialize
+ * only a subset of liblzma's internal static variables. Using those
+ * functions have the following advantages:
+ *  - When linking statically against liblzma, less useless functions will
+ *    get linked into the binary. E.g. if you need only the decoder functions,
+ *    using lzma_init_decoder() avoids linking bunch of encoder related code.
+ *  - There is less things to initialize, making the initialization
+ *    process slightly faster.
+ */
+extern void lzma_init(void);
+
+
+/**
+ * \brief       Initialize internal static variables needed by encoders
+ *
+ * If you need only the encoder functions, you may use this function to
+ * initialize only the things required by encoders.
+ *
+ * This function also calls lzma_init_check().
+ */
+extern void lzma_init_encoder(void);
+
+
+/**
+ * \brief       Initialize internal static variables needed by decoders
+ *
+ * If you need only the decoder functions, you may use this function to
+ * initialize only the things required by decoders.
+ *
+ * This function also calls lzma_init_check().
+ */
+extern void lzma_init_decoder(void);
+
+
+/**
+ * \brief       Initialize internal static variables needed by integrity checks
+ *
+ * Currently this initializes CRC32 and CRC64 lookup tables if precalculated
+ * tables haven't been built into the library. This function can be useful
+ * if the only thing you need from liblzma is the integrity check functions.
+ */
+extern void lzma_init_check(void);
diff --git a/src/liblzma/api/lzma/lzma.h b/src/liblzma/api/lzma/lzma.h
new file mode 100644
index 00000000..0fe74854
--- /dev/null
+++ b/src/liblzma/api/lzma/lzma.h
@@ -0,0 +1,312 @@
+/**
+ * \file        lzma/lzma.h
+ * \brief       LZMA filter
+ *
+ * \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       Filter ID
+ *
+ * Filter ID of the LZMA filter. This is used as lzma_options_filter.id.
+ */
+#define LZMA_FILTER_LZMA        LZMA_VLI_C(0x40)
+
+
+/**
+ * \brief       LZMA compression modes
+ *
+ * Currently there are only two modes. Earlier LZMA SDKs had also third
+ * mode between fast and best.
+ */
+typedef enum {
+	LZMA_MODE_INVALID = -1,
+		/**<
+		 * \brief       Invalid mode
+		 *
+		 * Used as array terminator in lzma_available_modes.
+		 */
+
+
+	LZMA_MODE_FAST = 0,
+		/**<
+		 * \brief       Fast compression
+		 *
+		 * Fast mode is usually at its best when combined with
+		 * a hash chain match finder.
+		 */
+
+	LZMA_MODE_BEST = 2
+		/**<
+		 * \brief       Best compression ratio
+		 *
+		 * This is usually notably slower than fast mode. Use this
+		 * together with binary tree match finders to expose the
+		 * full potential of the LZMA encoder.
+		 */
+} lzma_mode;
+
+
+/**
+ * \brief       Match finders
+ *
+ * Match finder has major effect on both speed and compression ratio.
+ * Usually hash chains are faster than binary trees.
+ */
+typedef enum {
+	LZMA_MF_INVALID = -1,
+		/**<
+		 * \brief       Invalid match finder ID
+		 *
+		 * Used as array terminator in lzma_available_match_finders.
+		 */
+
+	LZMA_MF_HC3     = 0x03,
+		/**<
+		 * \brief       Hash Chain with 3 bytes hashing
+		 *
+		 * \todo Memory requirements
+		 *
+		 * \note        It's possible that this match finder gets
+		 *              removed in future. The definition will stay
+		 *              in this header, but liblzma may return
+		 *              LZMA_HEADER_ERROR if it is specified (just
+		 *              like it would if the match finder had been
+		 *              disabled at compile time).
+		 */
+
+	LZMA_MF_HC4     = 0x04,
+		/**<
+		 * \brief       Hash Chain with 4 bytes hashing
+		 *
+		 * Memory requirements: 7.5 * dictionary_size + 4 MiB
+		 *
+		 * \note        It's possible that this match finder gets
+		 *              removed in future. The definition will stay
+		 *              in this header, but liblzma may return
+		 *              LZMA_HEADER_ERROR if it is specified (just
+		 *              like it would if the match finder had been
+		 *              disabled at compile time).
+		 */
+
+	LZMA_MF_BT2     = 0x12,
+		/**<
+		 * \brief       Binary Tree with 2 bytes hashing
+		 *
+		 * Memory requirements: 9.5 * dictionary_size + 4 MiB
+		 */
+
+	LZMA_MF_BT3     = 0x13,
+		/**<
+		 * \brief       Binary Tree with 3 bytes hashing
+		 *
+		 * Memory requirements: 11.5 * dictionary_size + 4 MiB
+		 */
+
+	LZMA_MF_BT4     = 0x14
+		/**<
+		 * \brief       Binary Tree with 4 bytes hashing
+		 *
+		 * Memory requirements: 11.5 * dictionary_size + 4 MiB
+		 */
+} lzma_match_finder;
+
+
+/**
+ * \brief       Options specific to the LZMA method handler
+ */
+typedef struct {
+	/**********************************
+	 * LZMA encoding/decoding options *
+	 **********************************/
+
+	/* These options are required in encoder and also with raw decoding. */
+
+	/**
+	 * \brief       Dictionary size in bytes
+	 *
+	 * Dictionary size indicates how many bytes of the recently processed
+	 * uncompressed data is kept in memory. One method to reduce size of
+	 * the uncompressed data is to store distance-length pairs, which
+	 * indicate what data to repeat from the dictionary buffer. Thus,
+	 * the bigger the dictionary, the better compression ratio usually is.
+	 *
+	 * Raw decoding: Too big dictionary does no other harm than
+	 * wasting memory. This value is ignored by lzma_raw_decode_buffer(),
+	 * because it uses the target buffer as the dictionary.
+	 */
+	uint32_t dictionary_size;
+#	define LZMA_DICTIONARY_SIZE_MIN            1
+#	define LZMA_DICTIONARY_SIZE_MAX            (UINT32_C(1) << 30)
+#	define LZMA_DICTIONARY_SIZE_DEFAULT        (UINT32_C(1) << 23)
+
+	/**
+	 * \brief       Number of literal context bits
+	 *
+	 * How many of the highest bits of the previous uncompressed
+	 * eight-bit byte (also known as `literal') are taken into
+	 * account when predicting the bits of the next literal.
+	 *
+	 * \todo        Example
+	 */
+	uint32_t literal_context_bits;
+#	define LZMA_LITERAL_CONTEXT_BITS_MIN       0
+#	define LZMA_LITERAL_CONTEXT_BITS_MAX       8
+#	define LZMA_LITERAL_CONTEXT_BITS_DEFAULT   3
+
+	/**
+	 * \brief       Number of literal position bits
+	 *
+	 * How many of the lowest bits of the current position (number
+	 * of bytes from the beginning of the uncompressed data) in the
+	 * uncompressed data is taken into account when predicting the
+	 * bits of the next literal (a single eight-bit byte).
+	 *
+	 * \todo        Example
+	 */
+	uint32_t literal_pos_bits;
+#	define LZMA_LITERAL_POS_BITS_MIN           0
+#	define LZMA_LITERAL_POS_BITS_MAX           4
+#	define LZMA_LITERAL_POS_BITS_DEFAULT       0
+
+	/**
+	 * \brief       Number of position bits
+	 *
+	 * How many of the lowest bits of the current position in the
+	 * uncompressed data is taken into account when estimating
+	 * probabilities of matches. A match is a sequence of bytes for
+	 * which a matching sequence is found from the dictionary and
+	 * thus can be stored as distance-length pair.
+	 *
+	 * Example: If most of the matches occur at byte positions
+	 * of 8 * n + 3, that is, 3, 11, 19, ... set pos_bits to 3,
+	 * because 2**3 == 8.
+	 */
+	uint32_t pos_bits;
+#	define LZMA_POS_BITS_MIN                   0
+#	define LZMA_POS_BITS_MAX                   4
+#	define LZMA_POS_BITS_DEFAULT               2
+
+	/**
+	 * \brief       Pointer to an initial dictionary
+	 *
+	 * It is possible to initialize the LZ77 history window using
+	 * a preset dictionary. Here is a good quote from zlib's
+	 * documentation; this applies to LZMA as is:
+	 *
+	 * "The dictionary should consist of strings (byte sequences) that
+	 * are likely to be encountered later in the data to be compressed,
+	 * with the most commonly used strings preferably put towards the
+	 * end of the dictionary. Using a dictionary is most useful when
+	 * the data to be compressed is short and can be predicted with
+	 * good accuracy; the data can then be compressed better than
+	 * with the default empty dictionary."
+	 * (From deflateSetDictionary() in zlib.h of zlib version 1.2.3)
+	 *
+	 * This feature should be used only in special situations.
+	 * It works correctly only with raw encoding and decoding.
+	 * Currently none of the container formats supported by
+	 * liblzma allow preset dictionary when decoding, thus if
+	 * you create a .lzma file with preset dictionary, it cannot
+	 * be decoded with the regular .lzma decoder functions.
+	 *
+	 * \todo        This feature is not implemented yet.
+	 */
+	const uint8_t *preset_dictionary;
+
+	/**
+	 * \brief       Size of the preset dictionary
+	 *
+	 * Specifies the size of the preset dictionary. If the size is
+	 * bigger than dictionary_size, only the last dictionary_size
+	 * bytes are processed.
+	 *
+	 * This variable is read only when preset_dictionary is not NULL.
+	 */
+	uint32_t preset_dictionary_size;
+
+	/******************************************
+	 * LZMA options needed only when encoding *
+	 ******************************************/
+
+	/** LZMA compression mode */
+	lzma_mode mode;
+
+	/**
+	 * \brief       Number of fast bytes
+	 *
+	 * Number of fast bytes determines how many bytes the encoder
+	 * compares from the match candidates when looking for the best
+	 * match. Bigger fast bytes value usually increase both compression
+	 * ratio and time.
+	 */
+	uint32_t fast_bytes;
+#	define LZMA_FAST_BYTES_MIN                 5
+#	define LZMA_FAST_BYTES_MAX                 273
+#	define LZMA_FAST_BYTES_DEFAULT             128
+
+	/** Match finder ID */
+	lzma_match_finder match_finder;
+
+	/**
+	 * \brief       Match finder cycles
+	 *
+	 * Higher values give slightly better compression ratio but
+	 * decrease speed. Use special value 0 to let liblzma use
+	 * match-finder-dependent default value.
+	 *
+	 * \todo        Write much better description.
+	 */
+	uint32_t match_finder_cycles;
+
+} lzma_options_lzma;
+
+
+/**
+ * \brief       Available LZMA encoding modes
+ *
+ * Pointer to an array containing the list of available encoding modes.
+ *
+ * This variable is available only if LZMA encoder has been enabled.
+ */
+extern const lzma_mode *const lzma_available_modes;
+
+
+/**
+ * \brief       Available match finders
+ *
+ * Pointer to an array containing the list of available match finders.
+ * The last element is LZMA_MF_INVALID.
+ *
+ * This variable is available only if LZMA encoder has been enabled.
+ */
+extern const lzma_match_finder *const lzma_available_match_finders;
+
+
+/**
+ * \brief       Table of presets for the LZMA filter
+ *
+ * lzma_presets[0] is the fastest and lzma_preset_lzma[8] is the slowest.
+ * These presets match the switches -1 .. -9 of the lzma command line tool
+ *
+ * The preset values are subject to changes between liblzma versions.
+ *
+ * This variable is available only if LZMA encoder has been enabled.
+ */
+extern const lzma_options_lzma lzma_preset_lzma[9];
diff --git a/src/liblzma/api/lzma/memlimit.h b/src/liblzma/api/lzma/memlimit.h
new file mode 100644
index 00000000..26ec50fe
--- /dev/null
+++ b/src/liblzma/api/lzma/memlimit.h
@@ -0,0 +1,157 @@
+/**
+ * \file        lzma/memlimit.h
+ * \brief       Memory usage limitter
+ *
+ * \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       Opaque data type used with the memory usage limitting functions
+ */
+typedef struct lzma_memlimit_s lzma_memlimit;
+
+
+/**
+ * \brief       Allocates and initializes a new lzma_memlimit structure
+ *
+ * It is easy to make liblzma to use huge amounts of memory. This can
+ * be a problem especially with the decoder, since it a file requiring
+ * huge amounts of memory to uncompress could allow even a denial of
+ * service attack if the memory usage wasn't limited.
+ *
+ * liblzma provides a set of functions to control memory usage. Pointers
+ * to these functions can be used in lzma_allocator structure, which makes
+ * it easy to limit memory usage with liblzma.
+ *
+ * The memory limitter functions are not tied to limitting memory usage
+ * with liblzma itself. You can use them with anything you like.
+ *
+ * In multi-threaded applications, only one thread at once may use the same
+ * lzma_memlimit structure. If there is a need, this limitation may
+ * be removed in future versions without breaking the libary API/ABI.
+ *
+ * \param       limit   Initial memory usage limit in bytes
+ *
+ * \return      Pointer to allocated and initialized lzma_memlimit
+ *              structure. On error, NULL is returned. The reason behind
+ *              an error is either that malloc() failed or that the given
+ *              limit was so small that it didn't allow allocating even
+ *              the lzma_memlimit structure itself.
+ *
+ * \note        Excluding lzma_memlimit_usage(), the functions whose name begin
+ *              lzma_memlimit_ can be used even if lzma_init() hasn't been
+ *              called.
+ */
+extern lzma_memlimit *lzma_memlimit_create(size_t limit);
+
+
+/**
+ * \brief       Sets a new memory usage limit
+ *
+ * \param       mem     Pointer to a lzma_memlimit structure returned
+ *                      earlier by lzma_memry_limit_create().
+ * \param       limit   New memory usage limit
+ *
+ * The new usage limit may be smaller than the amount of memory currently
+ * allocated via *mem: New allocations will fail until enough memory has
+ * been freed or a new limit is set, but the existing allocatations will
+ * stay untouched.
+ */
+extern void lzma_memlimit_set(lzma_memlimit *mem, size_t limit);
+
+
+/**
+ * \brief       Gets the current memory usage limit
+ */
+extern size_t lzma_memlimit_get(const lzma_memlimit *mem);
+
+
+/**
+ * \brief       Gets the amount of currently allocated memory
+ *
+ * \note        This value includes the sizes of some helper structures,
+ *              thus it will always be larger than the total number of
+ *              bytes allocated via lzma_memlimit_alloc().
+ */
+extern size_t lzma_memlimit_used(const lzma_memlimit *mem);
+
+
+/**
+ * \brief       Allocates memory with malloc() if memory limit allows
+ *
+ * \param       mem     Pointer to a lzma_memlimit structure returned
+ *                      earlier by lzma_memry_limit_create().
+ * \param       nmemb   Number of elements to allocate. While liblzma always
+ *                      sets this to one, this function still takes the
+ *                      value of nmemb into account to keep the function
+ *                      usable with zlib and libbzip2.
+ * \param       size    Size of an element.
+ *
+ * \return      Pointer to memory allocated with malloc(nmemb * size),
+ *              except if nmemb * size == 0 which returns malloc(1).
+ *              On error, NULL is returned.
+ *
+ * \note        This function assumes that nmemb * size is at maximum of
+ *              SIZE_MAX. If it isn't, an overflow will occur resulting
+ *              invalid amount of memory being allocated.
+ */
+extern void *lzma_memlimit_alloc(
+		lzma_memlimit *mem, size_t nmemb, size_t size);
+
+
+/**
+ * \brief       Removes the pointer from memory limitting list
+ *
+ * \param       mem     Pointer to a lzma_memlimit structure returned
+ *                      earlier by lzma_memry_limit_create().
+ * \param       ptr     Pointer returned earlier by lzma_memlimit_alloc().
+ *
+ * This function removes ptr from the internal list and decreases the
+ * counter of used memory accordingly. The ptr itself isn't freed. This is
+ * useful when Extra Records allocated by liblzma using lzma_memlimit
+ * are needed by the application and must not be freed when the
+ * lzma_memlimit structure is destroyed.
+ *
+ * It is OK to call this function with ptr that hasn't been allocated with
+ * lzma_memlimit_alloc(). In that case, this has no effect other than wasting
+ * a few CPU cycles.
+ */
+extern void lzma_memlimit_detach(lzma_memlimit *mem, void *ptr);
+
+
+/**
+ * \brief       Frees memory and updates the memory limit list
+ *
+ * This is like lzma_memlimit_detach() but also frees the given pointer.
+ */
+extern void lzma_memlimit_free(lzma_memlimit *mem, void *ptr);
+
+
+/**
+ * \brief       Frees the memory allocated for and by the memory usage limitter
+ *
+ * \param       mem             Pointer to memory limitter
+ * \param       free_allocated  If this is non-zero, all the memory allocated
+ *                              by lzma_memlimit_alloc() using *mem is also
+ *                              freed if it hasn't already been freed with
+ *                              lzma_memlimit_free(). Usually this should be
+ *                              set to true.
+ */
+extern void lzma_memlimit_end(
+		lzma_memlimit *mem, lzma_bool free_allocated);
diff --git a/src/liblzma/api/lzma/metadata.h b/src/liblzma/api/lzma/metadata.h
new file mode 100644
index 00000000..69592a3a
--- /dev/null
+++ b/src/liblzma/api/lzma/metadata.h
@@ -0,0 +1,100 @@
+/**
+ * \file        lzma/metadata.h
+ * \brief       Metadata handling
+ *
+ * \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       Information stored into a Metadata Block
+ *
+ * This structure holds all the information that can be stored to
+ * a Metadata Block.
+ */
+typedef struct {
+	/**
+	 * \brief       Size of Header Metadata Block
+	 */
+	lzma_vli header_metadata_size;
+
+	/**
+	 * \brief       Total Size of the Stream
+	 */
+	lzma_vli total_size;
+
+	/**
+	 * \brief       Uncompressed Size of the Stream
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       Index of the Blocks stored in the Stream
+	 */
+	lzma_index *index;
+
+	/**
+	 * \brief       Extra information
+	 */
+	lzma_extra *extra;
+
+} lzma_metadata;
+
+
+/**
+ * \brief       Calculate the encoded size of Metadata
+ *
+ * \return      Uncompressed size of the Metadata in encoded form. This value
+ *              may be passed to Block encoder as Uncompressed Size when using
+ *              Metadata filter. On error, zero is returned.
+ */
+extern lzma_vli lzma_metadata_size(const lzma_metadata *metadata);
+
+
+/**
+ * \brief       Initializes Metadata encoder
+ *
+ * \param       coder       Pointer to a pointer to hold Metadata encoder's
+ *                          internal state. Original value is ignored, thus
+ *                          you don't need to initialize the pointer.
+ * \param       allocator   Custom memory allocator; usually NULL.
+ * \param       metadata    Pointer to Metadata to encoded
+ *
+ * \return      - LZMA_OK: Initialization succeeded.
+ *              - LZMA_MEM_ERROR: Cannot allocate memory for *coder.
+ *
+ * The initialization function makes internal copy of the *metadata structure.
+ * However, the linked lists metadata->index and metadata->extra are NOT
+ * copied. Thus, the application may destroy *metadata after initialization
+ * if it likes, but not Index or Extra.
+ */
+extern lzma_ret lzma_metadata_encoder(lzma_stream *strm,
+		lzma_options_block *options, const lzma_metadata *metadata);
+
+
+/**
+ * \brief       Initializes Metadata decoder
+ *
+ * \param       want_extra    If this is true, Extra Records will be stored
+ *                            to metadata->extra. If this is false, Extra
+ *                            Records will be parsed but not stored anywhere,
+ *                            metadata->extra will be set to NULL.
+ */
+extern lzma_ret lzma_metadata_decoder(
+		lzma_stream *strm, lzma_options_block *options,
+		lzma_metadata *metadata, lzma_bool want_extra);
diff --git a/src/liblzma/api/lzma/raw.h b/src/liblzma/api/lzma/raw.h
new file mode 100644
index 00000000..c1ee41d8
--- /dev/null
+++ b/src/liblzma/api/lzma/raw.h
@@ -0,0 +1,72 @@
+/**
+ * \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);
diff --git a/src/liblzma/api/lzma/simple.h b/src/liblzma/api/lzma/simple.h
new file mode 100644
index 00000000..fb78d01f
--- /dev/null
+++ b/src/liblzma/api/lzma/simple.h
@@ -0,0 +1,85 @@
+/**
+ * \file        lzma/simple.h
+ * \brief       So called "simple" filters
+ *
+ * \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
+
+
+/* Filter IDs for lzma_options_filter.id */
+
+#define LZMA_FILTER_X86         LZMA_VLI_C(0x04)
+	/**<
+	 * BCJ (Branch, Call, Jump) filter for x86 binaries
+	 */
+
+#define LZMA_FILTER_POWERPC     LZMA_VLI_C(0x05)
+	/**<
+	 * Filter for Big endian PowerPC binaries
+	 */
+
+#define LZMA_FILTER_IA64        LZMA_VLI_C(0x06)
+	/**<
+	 * Filter for IA64 (Itanium) binaries.
+	 */
+
+#define LZMA_FILTER_ARM         LZMA_VLI_C(0x07)
+	/**<
+	 * Filter for ARM binaries.
+	 */
+
+#define LZMA_FILTER_ARMTHUMB    LZMA_VLI_C(0x08)
+	/**<
+	 * Filter for ARMThumb binaries.
+	 */
+
+#define LZMA_FILTER_SPARC       LZMA_VLI_C(0x09)
+	/**<
+	 * Filter for SPARC binaries.
+	 */
+
+
+/**
+ * \brief       Options for so called "simple" filters
+ *
+ * The simple filters never change the size of the data. Specifying options
+ * for them is optional: if pointer to options is NULL, default values are
+ * used. You probably never need to specify these options, so just set the
+ * options pointer to NULL and be happy.
+ *
+ * If options with non-default values have been specified when encoding,
+ * the same options must also be specified when decoding.
+ */
+typedef struct {
+	/**
+	 * \brief       Start offset for branch conversions
+	 *
+	 * This setting is useful only when the same filter is used
+	 * _separately_ for multiple sections of the same executable file,
+	 * and the sections contain cross-section branch/call/jump
+	 * instructions. In that case it is benefical to set the start
+	 * offset of the non-first sections so that the relative addresses
+	 * of the cross-section branch/call/jump instructions will use the
+	 * same absolute addresses as in the first section.
+	 *
+	 * When the pointer to options is NULL, the default value is used.
+	 * The default value is zero.
+	 */
+	uint32_t start_offset;
+
+} lzma_options_simple;
diff --git a/src/liblzma/api/lzma/stream.h b/src/liblzma/api/lzma/stream.h
new file mode 100644
index 00000000..be86075f
--- /dev/null
+++ b/src/liblzma/api/lzma/stream.h
@@ -0,0 +1,178 @@
+/**
+ * \file        lzma/stream.h
+ * \brief       .lzma Stream handling
+ *
+ * \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       Options for .lzma Stream encoder
+ */
+typedef struct {
+	/**
+	 * \brief       Type of integrity Check
+	 *
+	 * The type of the integrity Check is stored into Stream Header
+	 * and Stream Footer. The same Check is used for all Blocks in
+	 * the Stream.
+	 */
+	lzma_check_type check;
+
+	/**
+	 * \brief       Precense of CRC32 of the Block Header
+	 *
+	 * Set this to true if CRC32 of every Block Header should be
+	 * calculated and stored in the Block Header. This is recommended.
+	 *
+	 * This setting is stored into Stream Header and Stream Footer.
+	 */
+	lzma_bool has_crc32;
+
+	/**
+	 * \brief       Uncompressed Size in bytes
+	 *
+	 * This is somewhat advanced feature. Most users want to set this to
+	 * LZMA_VLI_VALUE_UNKNOWN to indicate unknown Uncompressed Size.
+	 *
+	 * If the Uncompressed Size of the Stream being encoded is known,
+	 * it can be stored to the beginning of the Stream. The details
+	 * differ for Single-Block and Multi-Block Streams:
+	 *  - With Single-Block Streams, the Uncompressed Size is stored to
+	 *    the Block Header and End of Payload Marker is omitted.
+	 *  - With Multi-Block Streams, the Uncompressed Size is stored to
+	 *    the Header Metadata Block. The Uncompressed Size of the Blocks
+	 *    will be unknown, because liblzma cannot predict how the
+	 *    application is going to split the data in Blocks.
+	 */
+	lzma_vli uncompressed_size;
+
+	/**
+	 * \brief       Alignment of the beginning of the Stream
+	 *
+	 * Certain filters handle data in bigger chunks than single bytes.
+	 * This affects two things:
+	 *   - Performance: aligned memory access is usually faster.
+	 *   - Further compression ratio in custom file formats: if you
+	 *     encode multiple Blocks with some non-compression filter
+	 *     such as LZMA_FILTER_POWERPC, it is a good idea to keep
+	 *     the inter-Block alignment correct to maximize compression
+	 *     ratio when all these Blocks are finally compressed as a
+	 *     single step.
+	 *
+	 * Usually the Stream is stored into its own file, thus
+	 * the alignment is usually zero.
+	 */
+	uint32_t alignment;
+
+	/**
+	 * \brief       Array of filters used to encode Data Blocks
+	 *
+	 * There can be at maximum of seven filters. The end of the array is
+	 * marked with .id = LZMA_VLI_VALUE_UNKNOWN. (That's why the array
+	 * has eight members.) Minimum number of filters is zero; in that
+	 * case, an implicit Copy filter is used.
+	 */
+	lzma_options_filter filters[8];
+
+	/**
+	 * \brief       Array of filters used to encode Metadata Blocks
+	 *
+	 * This is like filters[] but for Metadata Blocks. If Metadata
+	 * Blocks are compressed, they usually are compressed with
+	 * settings that require only little memory to uncompress e.g.
+	 * LZMA with 64 KiB dictionary.
+	 *
+	 * \todo        Recommend a preset.
+	 *
+	 * When liblzma sees that the Metadata Block would be very small
+	 * even in uncompressed form, it is not compressed no matter
+	 * what filter have been set here. This is to avoid possibly
+	 * increasing the size of the Metadata Block with bad compression,
+	 * and to avoid useless overhead of filters in uncompression phase.
+	 */
+	lzma_options_filter metadata_filters[8];
+
+	/**
+	 * \brief       Extra information in the Header Metadata Block
+	 */
+	lzma_extra *header;
+
+	/**
+	 * \brief       Extra information in the Footer Metadata Block
+	 *
+	 * It is enough to set this pointer any time before calling
+	 * lzma_code() with LZMA_FINISH as the second argument.
+	 */
+	lzma_extra *footer;
+
+} lzma_options_stream;
+
+
+/**
+ * \brief       Initializes Single-Block .lzma Stream encoder
+ *
+ * This is the function that most developers are looking for. :-) It
+ * compresses using the specified options without storing any extra
+ * information.
+ *
+ * \todo        Describe that is_metadata is ignored, maybe something else.
+ */
+extern lzma_ret lzma_stream_encoder_single(
+		lzma_stream *strm, const lzma_options_stream *options);
+
+
+/**
+ * \brief       Initializes Multi-Block .lzma Stream encoder
+ *
+ */
+extern lzma_ret lzma_stream_encoder_multi(
+		lzma_stream *strm, const lzma_options_stream *options);
+
+
+/**
+ * \brief       Initializes decoder for .lzma Stream
+ *
+ * \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.
+ *
+ * If header and/or footer are not NULL, *header and/or *footer will be
+ * initially set to NULL.
+ *
+ * The application can detect that Header Metadata Block has been completely
+ * parsed when the decoder procudes some output the first time. If *header
+ * is still NULL, there was no Extra field in the Header Metadata Block (or
+ * the whole Header Metadata Block wasn't present at all).
+ *
+ * The application can detect that Footer Metadata Block has been parsed
+ * completely when lzma_code() returns LZMA_STREAM_END. If *footer is still
+ * NULL, there was no Extra field in the Footer Metadata Block.
+ *
+ * \note        If you use lzma_memory_limitter, the Extra Records will be
+ *              allocated with it, and thus remain in the lzma_memory_limitter
+ *              even after they get exported to the application via *header
+ *              and *footer pointers.
+ */
+extern lzma_ret lzma_stream_decoder(lzma_stream *strm,
+		lzma_extra **header, lzma_extra **footer);
diff --git a/src/liblzma/api/lzma/stream_flags.h b/src/liblzma/api/lzma/stream_flags.h
new file mode 100644
index 00000000..070c91c9
--- /dev/null
+++ b/src/liblzma/api/lzma/stream_flags.h
@@ -0,0 +1,142 @@
+/**
+ * \file        lzma/stream_flags.h
+ * \brief       .lzma Stream Header and Stream tail 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       Size of Stream Header
+ *
+ * Magic Bytes (6) + Stream Flags (1) + CRC32 (4)
+ */
+#define LZMA_STREAM_HEADER_SIZE (6 + 1 + 4)
+
+
+/**
+ * \brief       Size of Stream tail
+ *
+ * Because Stream Footer already has a defined meaning in the file format
+ * specification, we use Stream tail to denote these two fields:
+ * Stream Flags (1) + Magic Bytes (2)
+ */
+#define LZMA_STREAM_TAIL_SIZE (1 + 2)
+
+
+/**
+ * Options for encoding and decoding Stream Header and Stream tail
+ */
+typedef struct {
+	/**
+	 * Type of the Check calculated from uncompressed data
+	 */
+	lzma_check_type check;
+
+	/**
+	 * True if Block Headers have the CRC32 field. Note that the CRC32
+	 * field is always present in the Stream Header.
+	 */
+	lzma_bool has_crc32;
+
+	/**
+	 * True if the Stream is a Multi-Block Stream.
+	 */
+	lzma_bool is_multi;
+
+} lzma_stream_flags;
+
+
+#define lzma_stream_flags_is_equal(a, b) \
+	((a).check == (b).check \
+		&& (a).has_crc32 == (b).has_crc32 \
+		&& (a).is_multi == (b).is_multi)
+
+
+/**
+ * \brief       Encodes Stream Header
+ *
+ * Encoding of the Stream Header is done with a single call instead of
+ * first initializing and then doing the actual work with lzma_code().
+ *
+ * \param       out         Beginning of the output buffer
+ * \param       out_pos     out[*out_pos] is the next write position. This
+ *                          is updated by the encoder.
+ * \param       out_size    out[out_size] is the first byte to not write.
+ * \param       options     Stream Header options to be encoded.
+ *
+ * \return      - LZMA_OK: Encoding was successful.
+ *              - LZMA_PROG_ERROR: Invalid options.
+ *              - LZMA_BUF_ERROR: Not enough output buffer space.
+ */
+extern lzma_ret lzma_stream_header_encode(
+		uint8_t *out, const lzma_stream_flags *options);
+
+
+/**
+ * \brief       Encodes Stream tail
+ *
+ * \param       footer      Pointer to a pointer that will hold the
+ *                          allocated buffer. Caller must free it once
+ *                          it isn't needed anymore.
+ * \param       footer_size Pointer to a variable that will the final size
+ *                          of the footer buffer.
+ * \param       allocator   lzma_allocator for custom allocator functions.
+ *                          Set to NULL to use malloc().
+ * \param       options     Stream Header options to be encoded.
+ *
+ * \return      - LZMA_OK: Success; *header and *header_size set.
+ *              - LZMA_PROG_ERROR: *options is invalid.
+ *              - LZMA_MEM_ERROR: Cannot allocate memory.
+ */
+extern lzma_ret lzma_stream_tail_encode(
+		uint8_t *out, const lzma_stream_flags *options);
+
+
+/**
+ * \brief       Initializes Stream Header decoder
+ *
+ * \param       strm        Pointer to lzma_stream used to pass input data
+ * \param       options     Target structure for parsed results
+ *
+ * \return      - LZMA_OK: Successfully initialized
+ *              - LZMA_MEM_ERROR: Cannot allocate memory
+ *
+ * The actual decoding is done with lzma_code() and freed with lzma_end().
+ */
+extern lzma_ret lzma_stream_header_decoder(
+		lzma_stream *strm, lzma_stream_flags *options);
+
+
+/**
+ * \brief       Initializes Stream tail decoder
+ *
+ * \param       strm        Pointer to lzma_stream used to pass input data
+ * \param       options     Target structure for parsed results.
+ * \param       decode_uncompressed_size
+ *                          Set to true if the first field to decode is
+ *                          Uncompressed Size. Set to false if the first
+ *                          field to decode is Backward Size.
+ *
+ * \return      - LZMA_OK: Successfully initialized
+ *              - LZMA_MEM_ERROR: Cannot allocate memory
+ *
+ * The actual decoding is done with lzma_code() and freed with lzma_end().
+ */
+extern lzma_ret lzma_stream_tail_decoder(
+		lzma_stream *strm, lzma_stream_flags *options);
diff --git a/src/liblzma/api/lzma/subblock.h b/src/liblzma/api/lzma/subblock.h
new file mode 100644
index 00000000..0474b6af
--- /dev/null
+++ b/src/liblzma/api/lzma/subblock.h
@@ -0,0 +1,197 @@
+/**
+ * \file        lzma/subblock.h
+ * \brief       Subblock filter
+ *
+ * \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       Filter ID
+ *
+ * Filter ID of the Subblock filter. This is used as lzma_options_filter.id.
+ */
+#define LZMA_FILTER_SUBBLOCK    LZMA_VLI_C(0x01)
+
+
+/**
+ * \brief       Subfilter mode
+ *
+ * See lzma_options_subblock.subfilter_mode for details.
+ */
+typedef enum {
+	LZMA_SUBFILTER_NONE,
+		/**<
+		 * No Subfilter is in use.
+		 */
+
+	LZMA_SUBFILTER_SET,
+		/**<
+		 * New Subfilter has been requested to be initialized.
+		 */
+
+	LZMA_SUBFILTER_RUN,
+		/**<
+		 * Subfilter is active.
+		 */
+
+	LZMA_SUBFILTER_FINISH
+		/**<
+		 * Subfilter has been requested to be finished.
+		 */
+} lzma_subfilter_mode;
+
+
+/**
+ * \brief       Options for the Subblock filter
+ *
+ * Specifying options for the Subblock filter is optional: if the pointer
+ * options is NULL, no subfilters are allowed and the default value is used
+ * for subblock_data_size.
+ */
+typedef struct {
+	/* Options for encoder and decoder */
+
+	/**
+	 * \brief       Allowing subfilters
+	 *
+	 * If this true, subfilters are allowed.
+	 *
+	 * In the encoder, if this is set to false, subfilter_mode and
+	 * subfilter_options are completely ignored.
+	 */
+	lzma_bool allow_subfilters;
+
+	/* Options for encoder only */
+
+	/**
+	 * \brief       Alignment
+	 *
+	 * The Subblock filter encapsulates the input data into Subblocks.
+	 * Each Subblock has a header which takes a few bytes of space.
+	 * When the output of the Subblock encoder is fed to another filter
+	 * that takes advantage of the alignment of the input data (e.g. LZMA),
+	 * the Subblock filter can add padding to keep the actual data parts
+	 * in the Subblocks aligned correctly.
+	 *
+	 * The alignment should be a positive integer. Subblock filter will
+	 * add enough padding between Subblocks so that this is true for
+	 * every payload byte:
+	 * input_offset % alignment == output_offset % alignment
+	 *
+	 * The Subblock filter assumes that the first output byte will be
+	 * written to a position in the output stream that is properly aligned.
+	 *
+	 * FIXME desc
+	 */
+	uint32_t alignment;
+#	define LZMA_SUBBLOCK_ALIGNMENT_MIN 1
+#	define LZMA_SUBBLOCK_ALIGNMENT_MAX 32
+#	define LZMA_SUBBLOCK_ALIGNMENT_DEFAULT 4
+
+	/**
+	 * \brief       Size of the Subblock Data part of each Subblock
+	 *
+	 * This value is re-read every time a new Subblock is started.
+	 *
+	 * Bigger values
+	 *   - save a few bytes of space;
+	 *   - increase latency in the encoder (but no effect for decoding);
+	 *   - decrease memory locality (increased cache pollution) in the
+	 *     encoder (no effect in decoding).
+	 */
+	uint32_t subblock_data_size;
+#	define LZMA_SUBBLOCK_DATA_SIZE_MIN 1
+#	define LZMA_SUBBLOCK_DATA_SIZE_MAX (UINT32_C(1) << 28)
+#	define LZMA_SUBBLOCK_DATA_SIZE_DEFAULT 4096
+
+	/**
+	 * \brief       Run-length encoder remote control
+	 *
+	 * The Subblock filter has an internal run-length encoder (RLE). It
+	 * can be useful when the data includes byte sequences that repeat
+	 * very many times. The RLE can be used also when a Subfilter is
+	 * in use; the RLE will be applied to the output of the Subfilter.
+	 *
+	 * Note that in contrast to traditional RLE, this RLE is intended to
+	 * be used only when there's a lot of data to be repeated. If the
+	 * input data has e.g. 500 bytes of NULs now and then, this RLE
+	 * is probably useless, because plain LZMA should provide better
+	 * results.
+	 *
+	 * Due to above reasons, it was decided to keep the implementation
+	 * of the RLE very simple. When the rle variable is non-zero, it
+	 * subblock_data_size must be a multiple of rle. Once the Subblock
+	 * encoder has got subblock_data_size bytes of input, it will check
+	 * if the whole buffer of the last subblock_data_size can be
+	 * represented with repeats of chunks having size of rle bytes.
+	 *
+	 * If there are consecutive identical buffers of subblock_data_size
+	 * bytes, they will be encoded using a single repeat entry if
+	 * possible.
+	 *
+	 * If need arises, more advanced RLE can be implemented later
+	 * without breaking API or ABI.
+	 */
+	uint32_t rle;
+#	define LZMA_SUBBLOCK_RLE_OFF 0
+#	define LZMA_SUBBLOCK_RLE_MIN 1
+#	define LZMA_SUBBLOCK_RLE_MAX 256
+
+	/**
+	 * \brief       Subfilter remote control
+	 *
+	 * When the Subblock filter is initialized, this variable must be
+	 * LZMA_SUBFILTER_NONE or LZMA_SUBFILTER_SET.
+	 *
+	 * When subfilter_mode is LZMA_SUBFILTER_NONE, the application may
+	 * put Subfilter options to subfilter_options structure, and then
+	 * set subfilter_mode to LZMA_SUBFILTER_SET. This implies setting
+	 * flush to true. No new input data will be read until the Subfilter
+	 * has been enabled. Once the Subfilter has been enabled, liblzma
+	 * will set subfilter_mode to LZMA_SUBFILTER_RUN.
+	 *
+	 * When subfilter_mode is LZMA_SUBFILTER_RUN, the application may
+	 * set subfilter_mode to LZMA_SUBFILTER_FINISH. No new input data
+	 * will be read until the Subfilter has been finished. Once the
+	 * Subfilter has been finished, liblzma will set subfilter_mode
+	 * to LZMA_SUBFILTER_NONE.
+	 *
+	 * If the intent is to have Subfilter enabled to the very end of
+	 * the data, it is not needed to separately disable Subfilter with
+	 * LZMA_SUBFILTER_FINISH. Using LZMA_FINISH as the second argument
+	 * of lzma_code() will make the Subblock encoder to disable the
+	 * Subfilter once all the data has been ran through the Subfilter.
+	 *
+	 * \note        This variable is ignored if allow_subfilters is false.
+	 */
+	lzma_subfilter_mode subfilter_mode;
+
+	/**
+	 * \brief       Subfilter and its options
+	 *
+	 * When no Subfilter is used, the data is copied as is into Subblocks.
+	 * Setting a Subfilter allows encoding some parts of the data with
+	 * an additional filter. It is possible to many different Subfilters
+	 * in the same Block, although only one can be used at once.
+	 *
+	 * \note        This variable is ignored if allow_subfilters is false.
+	 */
+	lzma_options_filter subfilter_options;
+
+} lzma_options_subblock;
diff --git a/src/liblzma/api/lzma/version.h b/src/liblzma/api/lzma/version.h
new file mode 100644
index 00000000..ffbf8a81
--- /dev/null
+++ b/src/liblzma/api/lzma/version.h
@@ -0,0 +1,59 @@
+/**
+ * \file        lzma/version.h
+ * \brief       Version number
+ *
+ * \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       Compile-time version number
+ *
+ * The version number is of format xyyyuuus where
+ *  - x is the major LZMA SDK version
+ *  - yyy is the minor LZMA SDK version
+ *  - uuu is LZMA Utils version (reset to zero every time SDK version
+ *    is incremented)
+ *  - s indicates stability: 0 = alpha, 1 = beta, 2 = stable
+ */
+#define LZMA_VERSION UINT32_C(40420010)
+
+
+/**
+ * \brief       liblzma version number as an integer
+ *
+ * This is the value of LZMA_VERSION macro at the compile time of liblzma.
+ * This allows the application to compare if it was built against the same,
+ * older, or newer version of liblzma that is currently running.
+ */
+extern const uint32_t lzma_version_number;
+
+
+/**
+ * \brief       Returns versions number of liblzma as a string
+ *
+ * This function may be useful if you want to display which version of
+ * libilzma your application is currently using.
+ *
+ * \return      Returns a pointer to a statically allocated string constant,
+ *              which contains the version number of liblzma. The format of
+ *              the version string is usually (but not necessarily) x.y.z
+ *              e.g. "4.42.1". Alpha and beta versions contain a suffix
+ *              ("4.42.0alpha").
+ */
+extern const char *const lzma_version_string;
diff --git a/src/liblzma/api/lzma/vli.h b/src/liblzma/api/lzma/vli.h
new file mode 100644
index 00000000..322014e1
--- /dev/null
+++ b/src/liblzma/api/lzma/vli.h
@@ -0,0 +1,244 @@
+/**
+ * \file        lzma/vli.h
+ * \brief       Variable-length integer handling
+ *
+ * \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       Maximum supported value of variable-length integer
+ */
+#define LZMA_VLI_VALUE_MAX (UINT64_MAX / 2)
+
+/**
+ * \brief       VLI value to denote that the value is unknown
+ */
+#define LZMA_VLI_VALUE_UNKNOWN UINT64_MAX
+
+/**
+ * \brief       Maximum supported length of variable length integers
+ */
+#define LZMA_VLI_BYTES_MAX 9
+
+
+/**
+ * \brief       VLI constant suffix
+ */
+#define LZMA_VLI_C(n) UINT64_C(n)
+
+
+/**
+ * \brief       Variable-length integer type
+ *
+ * This will always be unsigned integer. Valid VLI values are in the range
+ * [0, LZMA_VLI_VALUE_MAX]. Unknown value is indicated with
+ * LZMA_VLI_VALUE_UNKNOWN, which is the maximum value of the underlaying
+ * integer type (this feature is useful in several situations).
+ *
+ * In future, even if lzma_vli is typdefined to something else than uint64_t,
+ * it is guaranteed that 2 * LZMA_VLI_VALUE_MAX will not overflow lzma_vli.
+ * This simplifies integer overflow detection.
+ */
+typedef uint64_t lzma_vli;
+
+
+/**
+ * \brief       Simple macro to validate variable-length integer
+ *
+ * This is useful to test that application has given acceptable values
+ * for example in the uncompressed_size and compressed_size variables.
+ *
+ * \return      True if the integer is representable as VLI or if it
+ *              indicates unknown value.
+ */
+#define lzma_vli_is_valid(vli) \
+	((vli) <= LZMA_VLI_VALUE_MAX || (vli) == LZMA_VLI_VALUE_UNKNOWN)
+
+
+/**
+ * \brief       Sets VLI to given value with error checking
+ *
+ * \param       dest    Target variable which must have type of lzma_vli.
+ * \param       src     New value to be stored to dest.
+ * \param       limit   Maximum allowed value for src.
+ *
+ * \return      False on success, true on error. If an error occurred,
+ *              dest is left in undefined state (i.e. it's possible that
+ *              it will be different in newer liblzma versions).
+ */
+#define lzma_vli_set_lim(dest, src, limit) \
+	((src) > (limit) || ((dest) = (src)) > (limit))
+
+/**
+ * \brief
+ */
+#define lzma_vli_add_lim(dest, src, limit) \
+	((src) > (limit) || ((dest) += (src)) > (limit))
+
+#define lzma_vli_add2_lim(dest, src1, src2, limit) \
+	(lzma_vli_add_lim(dest, src1, limit) \
+		|| lzma_vli_add_lim(dest, src2, limit))
+
+#define lzma_vli_add3_lim(dest, src1, src2, src3, limit) \
+	(lzma_vli_add_lim(dest, src1, limit) \
+		|| lzma_vli_add_lim(dest, src2, limit) \
+		|| lzma_vli_add_lim(dest, src3, limit))
+
+#define lzma_vli_add4_lim(dest, src1, src2, src3, src4, limit) \
+	(lzma_vli_add_lim(dest, src1, limit) \
+		|| lzma_vli_add_lim(dest, src2, limit) \
+		|| lzma_vli_add_lim(dest, src3, limit) \
+		|| lzma_vli_add_lim(dest, src4, limit))
+
+#define lzma_vli_sum_lim(dest, src1, src2, limit) \
+	(lzma_vli_set_lim(dest, src1, limit) \
+		|| lzma_vli_add_lim(dest, src2, limit))
+
+#define lzma_vli_sum3_lim(dest, src1, src2, src3, limit) \
+	(lzma_vli_set_lim(dest, src1, limit) \
+		|| lzma_vli_add_lim(dest, src2, limit) \
+		|| lzma_vli_add_lim(dest, src3, limit))
+
+#define lzma_vli_sum4_lim(dest, src1, src2, src3, src4, limit) \
+	(lzma_vli_set_lim(dest, src1, limit) \
+		|| lzma_vli_add_lim(dest, src2, limit) \
+		|| lzma_vli_add_lim(dest, src3, limit) \
+		|| lzma_vli_add_lim(dest, src4, limit))
+
+#define lzma_vli_set(dest, src) lzma_vli_set_lim(dest, src, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_add(dest, src) lzma_vli_add_lim(dest, src, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_add2(dest, src1, src2) \
+	lzma_vli_add2_lim(dest, src1, src2, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_add3(dest, src1, src2, src3) \
+	lzma_vli_add3_lim(dest, src1, src2, src3, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_add4(dest, src1, src2, src3, src4) \
+	lzma_vli_add4_lim(dest, src1, src2, src3, src4, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_sum(dest, src1, src2) \
+	lzma_vli_sum_lim(dest, src1, src2, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_sum3(dest, src1, src2, src3) \
+	lzma_vli_sum3_lim(dest, src1, src2, src3, LZMA_VLI_VALUE_MAX)
+
+#define lzma_vli_sum4(dest, src1, src2, src3, src4) \
+	lzma_vli_sum4_lim(dest, src1, src2, src3, src4, LZMA_VLI_VALUE_MAX)
+
+
+/**
+ * \brief       Encodes variable-length integer
+ *
+ * In the new .lzma format, most integers are encoded in variable-length
+ * representation. This saves space when smaller values are more likely
+ * than bigger values.
+ *
+ * The encoding scheme encodes seven bits to every byte, using minimum
+ * number of bytes required to represent the given value. In other words,
+ * it puts 7-63 bits into 1-9 bytes. This implementation limits the number
+ * of bits used to 63, thus num must be at maximum of INT64_MAX / 2. You
+ * may use LZMA_VLI_VALUE_MAX for clarity.
+ *
+ * \param       vli       Integer to be encoded
+ * \param       vli_pos   How many bytes have already been written out. This
+ *                        must be less than 9 before calling this function.
+ * \param       vli_size  Minimum size that the variable-length representation
+ *                        must take. This is useful if you want to use
+ *                        variable-length integers as padding. Usually you want
+ *                        to set this to zero. The maximum allowed value is 9.
+ * \param       out       Beginning of the output buffer
+ * \param       out_pos   The next byte will be written to out[*out_pos].
+ * \param       out_size  Size of the out buffer; the first byte into
+ *                        which no data is written to is out[out_size].
+ *
+ * \return      - LZMA_OK: So far all OK, but the integer is not
+ *                completely written out yet.
+ *              - LZMA_STREAM_END: Integer successfully encoded.
+ *              - LZMA_BUF_ERROR: No output space (*out_pos == out_size)
+ *              - LZMA_PROG_ERROR: Arguments are not sane.
+ */
+extern lzma_ret lzma_vli_encode(
+		lzma_vli vli, size_t *lzma_restrict vli_pos, size_t vli_size,
+		uint8_t *lzma_restrict out, size_t *lzma_restrict out_pos,
+		size_t out_size);
+
+
+/**
+ * \brief       Decodes variable-length integer
+ *
+ * \param       vli       Pointer to decoded integer. The decoder will
+ *                        initialize it to zero when *vli_pos == 0, so
+ *                        application isn't required to initialize *vli.
+ * \param       vli_pos   How many bytes have already been decoded. When
+ *                        starting to decode a new integer, *vli_pos must
+ *                        be initialized to zero.
+ * \param       in        Beginning of the input buffer
+ * \param       in_pos    The next byte will be read from in[*in_pos].
+ * \param       in_size   Size of the input buffer; the first byte that
+ *                        won't be read is in[in_size].
+ *
+ * \return      - LZMA_OK: So far all OK, but the integer is not
+ *                completely decoded yet.
+ *              - LZMA_STREAM_END: Integer successfully decoded.
+ *              - LZMA_BUF_ERROR: No input data (*in_pos == in_size)
+ *              - LZMA_DATA_ERROR: Integer is longer than nine bytes.
+ *              - LZMA_PROG_ERROR: Arguments are not sane.
+ */
+extern lzma_ret lzma_vli_decode(lzma_vli *lzma_restrict vli,
+		size_t *lzma_restrict vli_pos, const uint8_t *lzma_restrict in,
+		size_t *lzma_restrict in_pos, size_t in_size);
+
+
+/**
+ * \brief       Decodes variable-length integer reading buffer backwards
+ *
+ * The variable-length integer encoding is designed so that it can be read
+ * either from the beginning to the end, or from the end to the beginning.
+ * This feature is needed to make the Stream parseable backwards;
+ * specifically, to read the Backward Size field in Stream Footer.
+ *
+ * \param       vli       Pointer to variable to hold the decoded integer.
+ * \param       in        Beginning of the input buffer
+ * \param       in_size   Number of bytes available in the in[] buffer.
+ *                        On successful decoding, this is updated to match
+ *                        the number of bytes used. (in[*in_size - 1] is the
+ *                        first byte to process. After successful decoding,
+ *                        in[*in_size] will point to the first byte of the
+ *                        variable-length integer.)
+ *
+ * \return      - LZMA_OK: Decoding successful
+ *              - LZMA_DATA_ERROR: No valid variable-length integer was found.
+ *              - LZMA_BUF_ERROR: Not enough input. Note that in practice,
+ *                this tends to be a sign of broken input, because the
+ *                applications usually do give as much input to this function
+ *                as the applications have available.
+ */
+extern lzma_ret lzma_vli_reverse_decode(
+		lzma_vli *vli, const uint8_t *in, size_t *in_size);
+
+
+/**
+ * \brief       Gets the minimum number of bytes required to encode vli
+ *
+ * \return      Number of bytes on success (1-9). If vli isn't valid,
+ *              zero is returned.
+ */
+extern size_t lzma_vli_size(lzma_vli vli);