Get rid of the built-in copy of LZ4

On Linux or BSD distributions we have a native version installed
via package manager. On Windows, we can just build it from source
like the other libraries.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 0 insertions, 307 deletions

diff --git a/lib/lz4/lz4hc.h b/lib/lz4/lz4hc.h
deleted file mode 100644
index 157d813..0000000
--- a/lib/lz4/lz4hc.h
+++ /dev/null
@@ -1,307 +0,0 @@
-/*
-   LZ4 HC - High Compression Mode of LZ4
-   Header File
-   Copyright (C) 2011-2017, 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 source repository : https://github.com/lz4/lz4
-   - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
-*/
-#ifndef LZ4_HC_H_19834876238432
-#define LZ4_HC_H_19834876238432
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-/* --- Dependency --- */
-/* note : lz4hc requires lz4.h/lz4.c for compilation */
-#include "lz4.h"   /* stddef, LZ4LIB_API, LZ4_DEPRECATED */
-
-
-/* --- Useful constants --- */
-#define LZ4HC_CLEVEL_MIN         3
-#define LZ4HC_CLEVEL_DEFAULT     9
-#define LZ4HC_CLEVEL_OPT_MIN    10
-#define LZ4HC_CLEVEL_MAX        12
-
-
-/*-************************************
- *  Block Compression
- **************************************/
-/*! LZ4_compress_HC() :
- *  Compress data from `src` into `dst`, using the powerful but slower "HC" algorithm.
- * `dst` must be already allocated.
- *  Compression is guaranteed to succeed if `dstCapacity >= LZ4_compressBound(srcSize)` (see "lz4.h")
- *  Max supported `srcSize` value is LZ4_MAX_INPUT_SIZE (see "lz4.h")
- * `compressionLevel` : any value between 1 and LZ4HC_CLEVEL_MAX will work.
- *                      Values > LZ4HC_CLEVEL_MAX behave the same as LZ4HC_CLEVEL_MAX.
- * @return : the number of bytes written into 'dst'
- *           or 0 if compression fails.
- */
-LZ4LIB_API int LZ4_compress_HC (const char* src, char* dst, int srcSize, int dstCapacity, int compressionLevel);
-
-
-/* Note :
- *   Decompression functions are provided within "lz4.h" (BSD license)
- */
-
-
-/*! LZ4_compress_HC_extStateHC() :
- *  Same as LZ4_compress_HC(), but using an externally allocated memory segment for `state`.
- * `state` size is provided by LZ4_sizeofStateHC().
- *  Memory segment must be aligned on 8-bytes boundaries (which a normal malloc() should do properly).
- */
-LZ4LIB_API int LZ4_sizeofStateHC(void);
-LZ4LIB_API int LZ4_compress_HC_extStateHC(void* stateHC, const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel);
-
-
-/*! LZ4_compress_HC_destSize() : v1.9.0+
- *  Will compress as much data as possible from `src`
- *  to fit into `targetDstSize` budget.
- *  Result is provided in 2 parts :
- * @return : the number of bytes written into 'dst' (necessarily <= targetDstSize)
- *           or 0 if compression fails.
- * `srcSizePtr` : on success, *srcSizePtr is updated to indicate how much bytes were read from `src`
- */
-LZ4LIB_API int LZ4_compress_HC_destSize(void* stateHC,
-                                  const char* src, char* dst,
-                                        int* srcSizePtr, int targetDstSize,
-                                        int compressionLevel);
-
-
-/*-************************************
- *  Streaming Compression
- *  Bufferless synchronous API
- **************************************/
- typedef union LZ4_streamHC_u LZ4_streamHC_t;   /* incomplete type (defined later) */
-
-/*
-  These functions compress data in successive blocks of any size,
-  using previous blocks as dictionary, to improve compression ratio.
-  One key assumption is that previous blocks (up to 64 KB) remain read-accessible while compressing next blocks.
-  There is an exception for ring buffers, which can be smaller than 64 KB.
-  Ring-buffer scenario is automatically detected and handled within LZ4_compress_HC_continue().
-
-  Before starting compression, state must be allocated and properly initialized.
-  LZ4_createStreamHC() does both, though compression level is set to LZ4HC_CLEVEL_DEFAULT.
-
-  Selecting the compression level can be done with LZ4_resetStreamHC_fast() (starts a new stream)
-  or LZ4_setCompressionLevel() (anytime, between blocks in the same stream) (experimental).
-  LZ4_resetStreamHC_fast() only works on states which have been properly initialized at least once,
-  which is automatically the case when state is created using LZ4_createStreamHC().
-
-  After reset, a first "fictional block" can be designated as initial dictionary,
-  using LZ4_loadDictHC() (Optional).
-
-  Invoke LZ4_compress_HC_continue() to compress each successive block.
-  The number of blocks is unlimited.
-  Previous input blocks, including initial dictionary when present,
-  must remain accessible and unmodified during compression.
-
-  It's allowed to update compression level anytime between blocks,
-  using LZ4_setCompressionLevel() (experimental).
-
-  'dst' buffer should be sized to handle worst case scenarios
-  (see LZ4_compressBound(), it ensures compression success).
-  In case of failure, the API does not guarantee recovery,
-  so the state _must_ be reset.
-  To ensure compression success
-  whenever `dst` buffer size cannot be made >= LZ4_compressBound(),
-  consider using LZ4_compress_HC_continue_destSize().
-
-  Whenever previous input blocks can't be preserved unmodified in-place during compression of next blocks,
-  it's possible to copy the last blocks into a more stable memory space, using LZ4_saveDictHC().
-  Return value of LZ4_saveDictHC() is the size of dictionary effectively saved into 'safeBuffer' (<= 64 KB)
-
-  After completing a streaming compression,
-  it's possible to start a new stream of blocks, using the same LZ4_streamHC_t state,
-  just by resetting it, using LZ4_resetStreamHC_fast().
-*/
-
-LZ4LIB_API void LZ4_resetStreamHC_fast(LZ4_streamHC_t* streamHCPtr, int compressionLevel);   /* v1.9.0+ */
-
-/*^**********************************************
- * !!!!!!   STATIC LINKING ONLY   !!!!!!
- ***********************************************/
-
-/*-******************************************************************
- * PRIVATE DEFINITIONS :
- * Do not use these definitions directly.
- * They are merely exposed to allow static allocation of `LZ4_streamHC_t`.
- * Declare an `LZ4_streamHC_t` directly, rather than any type below.
- * Even then, only do so in the context of static linking, as definitions may change between versions.
- ********************************************************************/
-
-#define LZ4HC_DICTIONARY_LOGSIZE 16
-#define LZ4HC_MAXD (1<<LZ4HC_DICTIONARY_LOGSIZE)
-#define LZ4HC_MAXD_MASK (LZ4HC_MAXD - 1)
-
-#define LZ4HC_HASH_LOG 15
-#define LZ4HC_HASHTABLESIZE (1 << LZ4HC_HASH_LOG)
-#define LZ4HC_HASH_MASK (LZ4HC_HASHTABLESIZE - 1)
-
-
-#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-#include <stdint.h>
-
-typedef struct LZ4HC_CCtx_internal LZ4HC_CCtx_internal;
-struct LZ4HC_CCtx_internal
-{
-    uint32_t   hashTable[LZ4HC_HASHTABLESIZE];
-    uint16_t   chainTable[LZ4HC_MAXD];
-    const uint8_t* end;         /* next block here to continue on current prefix */
-    const uint8_t* base;        /* All index relative to this position */
-    const uint8_t* dictBase;    /* alternate base for extDict */
-    uint32_t   dictLimit;       /* below that point, need extDict */
-    uint32_t   lowLimit;        /* below that point, no more dict */
-    uint32_t   nextToUpdate;    /* index from which to continue dictionary update */
-    short      compressionLevel;
-    int8_t     favorDecSpeed;   /* favor decompression speed if this flag set,
-                                   otherwise, favor compression ratio */
-    int8_t     dirty;           /* stream has to be fully reset if this flag is set */
-    const LZ4HC_CCtx_internal* dictCtx;
-};
-
-#else
-
-typedef struct LZ4HC_CCtx_internal LZ4HC_CCtx_internal;
-struct LZ4HC_CCtx_internal
-{
-    unsigned int   hashTable[LZ4HC_HASHTABLESIZE];
-    unsigned short chainTable[LZ4HC_MAXD];
-    const unsigned char* end;        /* next block here to continue on current prefix */
-    const unsigned char* base;       /* All index relative to this position */
-    const unsigned char* dictBase;   /* alternate base for extDict */
-    unsigned int   dictLimit;        /* below that point, need extDict */
-    unsigned int   lowLimit;         /* below that point, no more dict */
-    unsigned int   nextToUpdate;     /* index from which to continue dictionary update */
-    short          compressionLevel;
-    char           favorDecSpeed;    /* favor decompression speed if this flag set,
-                                        otherwise, favor compression ratio */
-    char           dirty;            /* stream has to be fully reset if this flag is set */
-    const LZ4HC_CCtx_internal* dictCtx;
-};
-
-#endif
-
-
-/* Do not use these definitions directly !
- * Declare or allocate an LZ4_streamHC_t instead.
- */
-#define LZ4_STREAMHCSIZE       (4*LZ4HC_HASHTABLESIZE + 2*LZ4HC_MAXD + 56 + ((sizeof(void*)==16) ? 56 : 0) /* AS400*/ ) /* 262200 or 262256*/
-#define LZ4_STREAMHCSIZE_SIZET (LZ4_STREAMHCSIZE / sizeof(size_t))
-union LZ4_streamHC_u {
-    size_t table[LZ4_STREAMHCSIZE_SIZET];
-    LZ4HC_CCtx_internal internal_donotuse;
-}; /* previously typedef'd to LZ4_streamHC_t */
-
-/* LZ4_streamHC_t :
- * This structure allows static allocation of LZ4 HC streaming state.
- * This can be used to allocate statically, on state, or as part of a larger structure.
- *
- * Such state **must** be initialized using LZ4_initStreamHC() before first use.
- *
- * Note that invoking LZ4_initStreamHC() is not required when
- * the state was created using LZ4_createStreamHC() (which is recommended).
- * Using the normal builder, a newly created state is automatically initialized.
- *
- * Static allocation shall only be used in combination with static linking.
- */
-
-/* LZ4_initStreamHC() : v1.9.0+
- * Required before first use of a statically allocated LZ4_streamHC_t.
- * Before v1.9.0 : use LZ4_resetStreamHC() instead
- */
-LZ4LIB_API LZ4_streamHC_t* LZ4_initStreamHC (void* buffer, size_t size);
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* LZ4_HC_H_19834876238432 */
-
-
-/*-**************************************************
- * !!!!!     STATIC LINKING ONLY     !!!!!
- * Following definitions are considered experimental.
- * They should not be linked from DLL,
- * as there is no guarantee of API stability yet.
- * Prototypes will be promoted to "stable" status
- * after successfull usage in real-life scenarios.
- ***************************************************/
-#ifdef LZ4_HC_STATIC_LINKING_ONLY   /* protection macro */
-#ifndef LZ4_HC_SLO_098092834
-#define LZ4_HC_SLO_098092834
-
-#define LZ4_STATIC_LINKING_ONLY   /* LZ4LIB_STATIC_API */
-#include "lz4.h"
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-/*! LZ4_setCompressionLevel() : v1.8.0+ (experimental)
- *  It's possible to change compression level
- *  between successive invocations of LZ4_compress_HC_continue*()
- *  for dynamic adaptation.
- */
-LZ4LIB_STATIC_API void LZ4_setCompressionLevel(
-    LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
-
-/*! LZ4_resetStreamHC_fast() : v1.9.0+
- *  When an LZ4_streamHC_t is known to be in a internally coherent state,
- *  it can often be prepared for a new compression with almost no work, only
- *  sometimes falling back to the full, expensive reset that is always required
- *  when the stream is in an indeterminate state (i.e., the reset performed by
- *  LZ4_resetStreamHC()).
- *
- *  LZ4_streamHCs are guaranteed to be in a valid state when:
- *  - returned from LZ4_createStreamHC()
- *  - reset by LZ4_resetStreamHC()
- *  - memset(stream, 0, sizeof(LZ4_streamHC_t))
- *  - the stream was in a valid state and was reset by LZ4_resetStreamHC_fast()
- *  - the stream was in a valid state and was then used in any compression call
- *    that returned success
- *  - the stream was in an indeterminate state and was used in a compression
- *    call that fully reset the state (LZ4_compress_HC_extStateHC()) and that
- *    returned success
- *
- *  Note:
- *  A stream that was last used in a compression call that returned an error
- *  may be passed to this function. However, it will be fully reset, which will
- *  clear any existing history and settings from the context.
- */
-LZ4LIB_STATIC_API void LZ4_resetStreamHC_fast(
-    LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif   /* LZ4_HC_SLO_098092834 */
-#endif   /* LZ4_HC_STATIC_LINKING_ONLY */