/*

   * LZ4 - Fast LZ compression algorithm

   * Copyright (C) 2011 - 2016, Yann Collet.
   * BSD 2 - Clause License (http://www.opensource.org/licenses/bsd - license.php)

   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:

   *	* Redistributions of source code must retain the above copyright
   *	  notice, this list of conditions and the following disclaimer.
   *	* Redistributions in binary form must reproduce the above

   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.

   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

   * You can contact the author at :
   *	- LZ4 homepage : http://www.lz4.org
   *	- LZ4 source repository : https://github.com/lz4/lz4

   *

   *	Changed for kernel usage by:
   *	Sven Schmidt <4sschmid@informatik.uni-hamburg.de>

   */

  /*-************************************
   *	Dependencies
   **************************************/
  #include <linux/lz4.h>
  #include "lz4defs.h"
  #include <linux/init.h>

  #include <linux/module.h>
  #include <linux/kernel.h>

  #include <asm/unaligned.h>

  /*-*****************************
   *	Decompression functions
   *******************************/

  
  #define DEBUGLOG(l, ...) {}	/* disabled */
  
  #ifndef assert
  #define assert(condition) ((void)0)
  #endif
  
  /*
   * LZ4_decompress_generic() :
   * This generic decompression function covers all use cases.
   * It shall be instantiated several times, using different sets of directives.
   * Note that it is important for performance that this function really get inlined,

   * in order to remove useless branches during compilation optimization.
   */
  static FORCE_INLINE int LZ4_decompress_generic(

  	 const char * const src,
  	 char * const dst,
  	 int srcSize,

  		/*
  		 * If endOnInput == endOnInputSize,

  		 * this value is `dstCapacity`

  		 */
  	 int outputSize,
  	 /* endOnOutputSize, endOnInputSize */

  	 endCondition_directive endOnInput,

  	 /* full, partial */

  	 earlyEnd_directive partialDecoding,

  	 /* noDict, withPrefix64k, usingExtDict */

  	 dict_directive dict,
  	 /* always <= dst, == dst when no prefix */

  	 const BYTE * const lowPrefix,
  	 /* only if dict == usingExtDict */
  	 const BYTE * const dictStart,
  	 /* note : = 0 if noDict */
  	 const size_t dictSize
  	 )

  {

  	const BYTE *ip = (const BYTE *) src;
  	const BYTE * const iend = ip + srcSize;

  	BYTE *op = (BYTE *) dst;

  	BYTE * const oend = op + outputSize;

  	BYTE *cpy;

  
  	const BYTE * const dictEnd = (const BYTE *)dictStart + dictSize;

  	static const unsigned int inc32table[8] = {0, 1, 2, 1, 0, 4, 4, 4};
  	static const int dec64table[8] = {0, 0, 0, -1, -4, 1, 2, 3};

  	const int safeDecode = (endOnInput == endOnInputSize);
  	const int checkOffset = ((safeDecode) && (dictSize < (int)(64 * KB)));

  	/* Set up the "end" pointers for the shortcut. */
  	const BYTE *const shortiend = iend -
  		(endOnInput ? 14 : 8) /*maxLL*/ - 2 /*offset*/;
  	const BYTE *const shortoend = oend -
  		(endOnInput ? 14 : 8) /*maxLL*/ - 18 /*maxML*/;
  
  	DEBUGLOG(5, "%s (srcSize:%i, dstSize:%i)", __func__,
  		 srcSize, outputSize);

  	/* Special cases */

  	assert(lowPrefix <= op);
  	assert(src != NULL);

  
  	/* Empty output buffer */
  	if ((endOnInput) && (unlikely(outputSize == 0)))

  		return ((srcSize == 1) && (*ip == 0)) ? 0 : -1;

  
  	if ((!endOnInput) && (unlikely(outputSize == 0)))
  		return (*ip == 0 ? 1 : -1);

  	if ((endOnInput) && unlikely(srcSize == 0))
  		return -1;

  	/* Main Loop : decode sequences */

  	while (1) {

  		size_t length;
  		const BYTE *match;
  		size_t offset;
  
  		/* get literal length */
  		unsigned int const token = *ip++;

  		length = token>>ML_BITS;

  		/* ip < iend before the increment */
  		assert(!endOnInput || ip <= iend);
  
  		/*
  		 * A two-stage shortcut for the most common case:
  		 * 1) If the literal length is 0..14, and there is enough
  		 * space, enter the shortcut and copy 16 bytes on behalf
  		 * of the literals (in the fast mode, only 8 bytes can be
  		 * safely copied this way).
  		 * 2) Further if the match length is 4..18, copy 18 bytes
  		 * in a similar manner; but we ensure that there's enough
  		 * space in the output for those 18 bytes earlier, upon
  		 * entering the shortcut (in other words, there is a
  		 * combined check for both stages).
  		 */
  		if ((endOnInput ? length != RUN_MASK : length <= 8)
  		   /*
  		    * strictly "less than" on input, to re-enter
  		    * the loop with at least one byte
  		    */
  		   && likely((endOnInput ? ip < shortiend : 1) &
  			     (op <= shortoend))) {
  			/* Copy the literals */
  			memcpy(op, ip, endOnInput ? 16 : 8);
  			op += length; ip += length;
  
  			/*
  			 * The second stage:
  			 * prepare for match copying, decode full info.
  			 * If it doesn't work out, the info won't be wasted.
  			 */
  			length = token & ML_MASK; /* match length */
  			offset = LZ4_readLE16(ip);
  			ip += 2;
  			match = op - offset;
  			assert(match <= op); /* check overflow */
  
  			/* Do not deal with overlapping matches. */
  			if ((length != ML_MASK) &&
  			    (offset >= 8) &&
  			    (dict == withPrefix64k || match >= lowPrefix)) {
  				/* Copy the match. */
  				memcpy(op + 0, match + 0, 8);
  				memcpy(op + 8, match + 8, 8);
  				memcpy(op + 16, match + 16, 2);
  				op += length + MINMATCH;
  				/* Both stages worked, load the next token. */
  				continue;
  			}
  
  			/*
  			 * The second stage didn't work out, but the info
  			 * is ready. Propel it right to the point of match
  			 * copying.
  			 */
  			goto _copy_match;
  		}
  
  		/* decode literal length */

  		if (length == RUN_MASK) {

  			unsigned int s;

  			if (unlikely(endOnInput ? ip >= iend - RUN_MASK : 0)) {
  				/* overflow detection */
  				goto _output_error;
  			}

  			do {
  				s = *ip++;
  				length += s;
  			} while (likely(endOnInput
  				? ip < iend - RUN_MASK
  				: 1) & (s == 255));
  
  			if ((safeDecode)

  			    && unlikely((uptrval)(op) +
  					length < (uptrval)(op))) {

  				/* overflow detection */

  				goto _output_error;

  			}
  			if ((safeDecode)

  			    && unlikely((uptrval)(ip) +
  					length < (uptrval)(ip))) {

  				/* overflow detection */
  				goto _output_error;
  			}

  		}
  
  		/* copy literals */
  		cpy = op + length;

  		LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
  
  		if (((endOnInput) && ((cpy > oend - MFLIMIT)

  			|| (ip + length > iend - (2 + 1 + LASTLITERALS))))
  			|| ((!endOnInput) && (cpy > oend - WILDCOPYLENGTH))) {
  			if (partialDecoding) {
  				if (cpy > oend) {
  					/*

  					 * Partial decoding :
  					 * stop in the middle of literal segment

  					 */

  					cpy = oend;
  					length = oend - op;

  				}
  				if ((endOnInput)
  					&& (ip + length > iend)) {
  					/*
  					 * Error :
  					 * read attempt beyond
  					 * end of input buffer
  					 */
  					goto _output_error;
  				}
  			} else {
  				if ((!endOnInput)
  					&& (cpy != oend)) {
  					/*
  					 * Error :
  					 * block decoding must
  					 * stop exactly there
  					 */
  					goto _output_error;
  				}
  				if ((endOnInput)
  					&& ((ip + length != iend)
  					|| (cpy > oend))) {
  					/*
  					 * Error :
  					 * input must be consumed
  					 */
  					goto _output_error;
  				}
  			}

  
  			memcpy(op, ip, length);
  			ip += length;

  			op += length;

  			/* Necessarily EOF, due to parsing restrictions */

  			if (!partialDecoding || (cpy == oend))
  				break;
  		} else {
  			/* may overwrite up to WILDCOPYLENGTH beyond cpy */
  			LZ4_wildCopy(op, ip, cpy);
  			ip += length;
  			op = cpy;

  		}

  		/* get offset */

  		offset = LZ4_readLE16(ip);

  		ip += 2;

  		match = op - offset;

  		/* get matchlength */
  		length = token & ML_MASK;
  
  _copy_match:
  		if ((checkOffset) && (unlikely(match + dictSize < lowPrefix))) {

  			/* Error : offset outside buffers */

  			goto _output_error;

  		}
  
  		/* costs ~1%; silence an msan warning when offset == 0 */

  		/*
  		 * note : when partialDecoding, there is no guarantee that
  		 * at least 4 bytes remain available in output buffer
  		 */
  		if (!partialDecoding) {
  			assert(oend > op);
  			assert(oend - op >= 4);
  
  			LZ4_write32(op, (U32)offset);
  		}

  		if (length == ML_MASK) {

  			unsigned int s;
  
  			do {
  				s = *ip++;
  
  				if ((endOnInput) && (ip > iend - LASTLITERALS))
  					goto _output_error;
  
  				length += s;
  			} while (s == 255);
  
  			if ((safeDecode)
  				&& unlikely(

  					(uptrval)(op) + length < (uptrval)op)) {

  				/* overflow detection */

  				goto _output_error;

  			}

  		}

  		length += MINMATCH;

  		/* match starting within external dictionary */

  		if ((dict == usingExtDict) && (match < lowPrefix)) {
  			if (unlikely(op + length > oend - LASTLITERALS)) {
  				/* doesn't respect parsing restriction */

  				if (!partialDecoding)
  					goto _output_error;
  				length = min(length, (size_t)(oend - op));

  			}
  
  			if (length <= (size_t)(lowPrefix - match)) {
  				/*

  				 * match fits entirely within external
  				 * dictionary : just copy

  				 */
  				memmove(op, dictEnd - (lowPrefix - match),
  					length);
  				op += length;
  			} else {
  				/*

  				 * match stretches into both external

  				 * dictionary and current block
  				 */
  				size_t const copySize = (size_t)(lowPrefix - match);
  				size_t const restSize = length - copySize;
  
  				memcpy(op, dictEnd - copySize, copySize);
  				op += copySize;

  				if (restSize > (size_t)(op - lowPrefix)) {
  					/* overlap copy */
  					BYTE * const endOfMatch = op + restSize;
  					const BYTE *copyFrom = lowPrefix;
  
  					while (op < endOfMatch)
  						*op++ = *copyFrom++;
  				} else {
  					memcpy(op, lowPrefix, restSize);
  					op += restSize;
  				}
  			}

  			continue;
  		}
  
  		/* copy match within block */
  		cpy = op + length;

  		/*
  		 * partialDecoding :
  		 * may not respect endBlock parsing restrictions
  		 */
  		assert(op <= oend);
  		if (partialDecoding &&
  		    (cpy > oend - MATCH_SAFEGUARD_DISTANCE)) {
  			size_t const mlen = min(length, (size_t)(oend - op));
  			const BYTE * const matchEnd = match + mlen;
  			BYTE * const copyEnd = op + mlen;
  
  			if (matchEnd > op) {
  				/* overlap copy */
  				while (op < copyEnd)
  					*op++ = *match++;
  			} else {
  				memcpy(op, match, mlen);
  			}
  			op = copyEnd;
  			if (op == oend)
  				break;
  			continue;
  		}

  		if (unlikely(offset < 8)) {

  			op[0] = match[0];
  			op[1] = match[1];
  			op[2] = match[2];
  			op[3] = match[3];

  			match += inc32table[offset];

  			memcpy(op + 4, match, 4);

  			match -= dec64table[offset];

  		} else {

  			LZ4_copy8(op, match);
  			match += 8;

  		}

  		op += 8;

  		if (unlikely(cpy > oend - MATCH_SAFEGUARD_DISTANCE)) {

  			BYTE * const oCopyLimit = oend - (WILDCOPYLENGTH - 1);
  
  			if (cpy > oend - LASTLITERALS) {
  				/*
  				 * Error : last LASTLITERALS bytes
  				 * must be literals (uncompressed)
  				 */

  				goto _output_error;

  			}
  
  			if (op < oCopyLimit) {
  				LZ4_wildCopy(op, match, oCopyLimit);
  				match += oCopyLimit - op;
  				op = oCopyLimit;
  			}

  			while (op < cpy)

  				*op++ = *match++;
  		} else {
  			LZ4_copy8(op, match);

  			if (length > 16)
  				LZ4_wildCopy(op + 8, match + 8, cpy);

  		}

  		op = cpy; /* wildcopy correction */

  	}

  	/* end of decoding */

  	if (endOnInput) {
  		/* Nb of output bytes decoded */

  		return (int) (((char *)op) - dst);

  	} else {
  		/* Nb of input bytes read */

  		return (int) (((const char *)ip) - src);

  	}

  	/* Overflow error detected */

  _output_error:

  	return (int) (-(((const char *)ip) - src)) - 1;

  }

  int LZ4_decompress_safe(const char *source, char *dest,
  	int compressedSize, int maxDecompressedSize)

  {

  	return LZ4_decompress_generic(source, dest,
  				      compressedSize, maxDecompressedSize,
  				      endOnInputSize, decode_full_block,
  				      noDict, (BYTE *)dest, NULL, 0);

  }

  int LZ4_decompress_safe_partial(const char *src, char *dst,
  	int compressedSize, int targetOutputSize, int dstCapacity)

  {

  	dstCapacity = min(targetOutputSize, dstCapacity);
  	return LZ4_decompress_generic(src, dst, compressedSize, dstCapacity,
  				      endOnInputSize, partial_decode,
  				      noDict, (BYTE *)dst, NULL, 0);

  }

  int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
  {
  	return LZ4_decompress_generic(source, dest, 0, originalSize,

  				      endOnOutputSize, decode_full_block,
  				      withPrefix64k,
  				      (BYTE *)dest - 64 * KB, NULL, 0);
  }
  
  /* ===== Instantiate a few more decoding cases, used more than once. ===== */
  
  int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
  				      int compressedSize, int maxOutputSize)
  {
  	return LZ4_decompress_generic(source, dest,
  				      compressedSize, maxOutputSize,
  				      endOnInputSize, decode_full_block,
  				      withPrefix64k,
  				      (BYTE *)dest - 64 * KB, NULL, 0);
  }
  
  static int LZ4_decompress_safe_withSmallPrefix(const char *source, char *dest,
  					       int compressedSize,
  					       int maxOutputSize,
  					       size_t prefixSize)
  {
  	return LZ4_decompress_generic(source, dest,
  				      compressedSize, maxOutputSize,
  				      endOnInputSize, decode_full_block,
  				      noDict,
  				      (BYTE *)dest - prefixSize, NULL, 0);
  }
  
  int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
  				     int compressedSize, int maxOutputSize,
  				     const void *dictStart, size_t dictSize)
  {
  	return LZ4_decompress_generic(source, dest,
  				      compressedSize, maxOutputSize,
  				      endOnInputSize, decode_full_block,
  				      usingExtDict, (BYTE *)dest,
  				      (const BYTE *)dictStart, dictSize);

  }

  static int LZ4_decompress_fast_extDict(const char *source, char *dest,
  				       int originalSize,
  				       const void *dictStart, size_t dictSize)
  {
  	return LZ4_decompress_generic(source, dest,
  				      0, originalSize,
  				      endOnOutputSize, decode_full_block,
  				      usingExtDict, (BYTE *)dest,
  				      (const BYTE *)dictStart, dictSize);
  }
  
  /*
   * The "double dictionary" mode, for use with e.g. ring buffers: the first part
   * of the dictionary is passed as prefix, and the second via dictStart + dictSize.
   * These routines are used only once, in LZ4_decompress_*_continue().
   */
  static FORCE_INLINE
  int LZ4_decompress_safe_doubleDict(const char *source, char *dest,
  				   int compressedSize, int maxOutputSize,
  				   size_t prefixSize,
  				   const void *dictStart, size_t dictSize)
  {
  	return LZ4_decompress_generic(source, dest,
  				      compressedSize, maxOutputSize,
  				      endOnInputSize, decode_full_block,
  				      usingExtDict, (BYTE *)dest - prefixSize,
  				      (const BYTE *)dictStart, dictSize);
  }
  
  static FORCE_INLINE
  int LZ4_decompress_fast_doubleDict(const char *source, char *dest,
  				   int originalSize, size_t prefixSize,
  				   const void *dictStart, size_t dictSize)
  {
  	return LZ4_decompress_generic(source, dest,
  				      0, originalSize,
  				      endOnOutputSize, decode_full_block,
  				      usingExtDict, (BYTE *)dest - prefixSize,
  				      (const BYTE *)dictStart, dictSize);
  }
  
  /* ===== streaming decompression functions ===== */

  int LZ4_setStreamDecode(LZ4_streamDecode_t *LZ4_streamDecode,
  	const char *dictionary, int dictSize)
  {

  	LZ4_streamDecode_t_internal *lz4sd =
  		&LZ4_streamDecode->internal_donotuse;

  	lz4sd->prefixSize = (size_t) dictSize;
  	lz4sd->prefixEnd = (const BYTE *) dictionary + dictSize;
  	lz4sd->externalDict = NULL;
  	lz4sd->extDictSize	= 0;
  	return 1;
  }

  /*
   * *_continue() :
   * These decoding functions allow decompression of multiple blocks
   * in "streaming" mode.
   * Previously decoded blocks must still be available at the memory
   * position where they were decoded.
   * If it's not possible, save the relevant part of
   * decoded data into a safe buffer,
   * and indicate where it stands using LZ4_setStreamDecode()
   */
  int LZ4_decompress_safe_continue(LZ4_streamDecode_t *LZ4_streamDecode,
  	const char *source, char *dest, int compressedSize, int maxOutputSize)
  {

  	LZ4_streamDecode_t_internal *lz4sd =
  		&LZ4_streamDecode->internal_donotuse;

  	int result;

  	if (lz4sd->prefixSize == 0) {
  		/* The first call, no dictionary yet. */
  		assert(lz4sd->extDictSize == 0);
  		result = LZ4_decompress_safe(source, dest,
  			compressedSize, maxOutputSize);
  		if (result <= 0)
  			return result;
  		lz4sd->prefixSize = result;
  		lz4sd->prefixEnd = (BYTE *)dest + result;
  	} else if (lz4sd->prefixEnd == (BYTE *)dest) {
  		/* They're rolling the current segment. */
  		if (lz4sd->prefixSize >= 64 * KB - 1)
  			result = LZ4_decompress_safe_withPrefix64k(source, dest,
  				compressedSize, maxOutputSize);
  		else if (lz4sd->extDictSize == 0)
  			result = LZ4_decompress_safe_withSmallPrefix(source,
  				dest, compressedSize, maxOutputSize,
  				lz4sd->prefixSize);
  		else
  			result = LZ4_decompress_safe_doubleDict(source, dest,
  				compressedSize, maxOutputSize,
  				lz4sd->prefixSize,
  				lz4sd->externalDict, lz4sd->extDictSize);

  		if (result <= 0)
  			return result;

  		lz4sd->prefixSize += result;

  		lz4sd->prefixEnd  += result;

  	} else {

  		/*
  		 * The buffer wraps around, or they're
  		 * switching to another buffer.
  		 */

  		lz4sd->extDictSize = lz4sd->prefixSize;
  		lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;

  		result = LZ4_decompress_safe_forceExtDict(source, dest,

  			compressedSize, maxOutputSize,

  			lz4sd->externalDict, lz4sd->extDictSize);
  		if (result <= 0)
  			return result;
  		lz4sd->prefixSize = result;

  		lz4sd->prefixEnd  = (BYTE *)dest + result;

  	}

  	return result;
  }

  int LZ4_decompress_fast_continue(LZ4_streamDecode_t *LZ4_streamDecode,
  	const char *source, char *dest, int originalSize)
  {
  	LZ4_streamDecode_t_internal *lz4sd = &LZ4_streamDecode->internal_donotuse;
  	int result;

  	if (lz4sd->prefixSize == 0) {
  		assert(lz4sd->extDictSize == 0);
  		result = LZ4_decompress_fast(source, dest, originalSize);
  		if (result <= 0)
  			return result;
  		lz4sd->prefixSize = originalSize;
  		lz4sd->prefixEnd = (BYTE *)dest + originalSize;
  	} else if (lz4sd->prefixEnd == (BYTE *)dest) {
  		if (lz4sd->prefixSize >= 64 * KB - 1 ||
  		    lz4sd->extDictSize == 0)
  			result = LZ4_decompress_fast(source, dest,
  						     originalSize);
  		else
  			result = LZ4_decompress_fast_doubleDict(source, dest,
  				originalSize, lz4sd->prefixSize,
  				lz4sd->externalDict, lz4sd->extDictSize);

  		if (result <= 0)
  			return result;

  		lz4sd->prefixSize += originalSize;

  		lz4sd->prefixEnd  += originalSize;

  	} else {
  		lz4sd->extDictSize = lz4sd->prefixSize;
  		lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;

  		result = LZ4_decompress_fast_extDict(source, dest,
  			originalSize, lz4sd->externalDict, lz4sd->extDictSize);

  		if (result <= 0)
  			return result;
  		lz4sd->prefixSize = originalSize;

  		lz4sd->prefixEnd = (BYTE *)dest + originalSize;

  	}

  	return result;

  }

  int LZ4_decompress_safe_usingDict(const char *source, char *dest,
  				  int compressedSize, int maxOutputSize,
  				  const char *dictStart, int dictSize)

  {

  	if (dictSize == 0)

  		return LZ4_decompress_safe(source, dest,
  					   compressedSize, maxOutputSize);
  	if (dictStart+dictSize == dest) {
  		if (dictSize >= 64 * KB - 1)
  			return LZ4_decompress_safe_withPrefix64k(source, dest,
  				compressedSize, maxOutputSize);
  		return LZ4_decompress_safe_withSmallPrefix(source, dest,
  			compressedSize, maxOutputSize, dictSize);

  	}

  	return LZ4_decompress_safe_forceExtDict(source, dest,
  		compressedSize, maxOutputSize, dictStart, dictSize);

  }

  int LZ4_decompress_fast_usingDict(const char *source, char *dest,

  				  int originalSize,
  				  const char *dictStart, int dictSize)

  {

  	if (dictSize == 0 || dictStart + dictSize == dest)
  		return LZ4_decompress_fast(source, dest, originalSize);
  
  	return LZ4_decompress_fast_extDict(source, dest, originalSize,
  		dictStart, dictSize);

  }

  #ifndef STATIC

  EXPORT_SYMBOL(LZ4_decompress_safe);
  EXPORT_SYMBOL(LZ4_decompress_safe_partial);
  EXPORT_SYMBOL(LZ4_decompress_fast);
  EXPORT_SYMBOL(LZ4_setStreamDecode);
  EXPORT_SYMBOL(LZ4_decompress_safe_continue);
  EXPORT_SYMBOL(LZ4_decompress_fast_continue);
  EXPORT_SYMBOL(LZ4_decompress_safe_usingDict);
  EXPORT_SYMBOL(LZ4_decompress_fast_usingDict);

  MODULE_LICENSE("Dual BSD/GPL");

  MODULE_DESCRIPTION("LZ4 decompressor");

  #endif