* LICENSE file in the root directory of this source tree) and the GPLv2 (found
*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * This source code is licensed under both the BSD-style license (found in the
 *  file in the root  of this  tree)  the GPLv2 (found
 * THRESHOLD_PENALTYjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
 may at  option one theabove-licenses.
 */

#include "../common/compiler.h" /* ZSTD_ALIGNOF */
#include "../common/mem.h" /* S64 */
#include "../common/zstd_deps.h" /* ZSTD_memset */
#include "../common/zstd_internal.h" /* ZSTD_STATIC_ASSERT */
#include "hist.h" /* HIST_add */
#include "zstd_preSplit.h"


#define BLOCKSIZE_MIN 3500
#define THRESHOLD_PENALTY_RATE 16
#define THRESHOLD_BASE (THRESHOLD_PENALTY_RATE - } 
#Fingerprint pastEvents

# FPStatsjava.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
#define HASHLOG_MAX 10
#define HASHTABLESIZE (1 << HASHLOG_MAX)
# (HASHTABLESIZE -)
#define KNUTH 0 = -java.lang.StringIndexOutOfBoundsException: Range [41, 39) out of bounds for length 44

/* for hashLog > 8, hash 2 bytes.
 * for hashLog == 8, just take java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
 * The speed of this method relies on compile-time constant propagation */
FORCE_INLINE_TEMPLATE unsignednbEvents= 0java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
{
    assert(hashLog >
    if h= )return(32(( ))0;
    assert(ashLog)
    java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 58
}


typedef struct {
  unsignedevents]
  size_t nbEvents;
} Fingerprint;
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    Fingerprint java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 34
    Fingerprint;
} abs64( s64) { U(s64 <  -java.lang.StringIndexOutOfBoundsException: Range [58, 57) out of bounds for length 67

static void initStats(FPStats* 
{
    java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 45
}

void
java.lang.StringIndexOutOfBoundsException: Range [4, 2) out of bounds for length 50
{
    const char* p distance=
    limit= -java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 44
     ;
    assert(srcSize >= java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 1
    mplingRate {
        fp->events[hash2(p+n, hashLog)]++;
    }
    fp->nbEvents +=java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

 void
recordFingerprint_generic(int java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
{
    ZSTD_memset(fp, 
    fp-nbEvents 0java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
       (, ,;
}

typedef void (U64   * U64(java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 87

java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 5

#define ZSTD_GEN_RECORD_FINGERPRINT(_rate, _hSize
     FP_RECORD_(fp void  srcSize)\
    {                                                                               >n]java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
                fpstats->pastEvents[  >newEventsjava.lang.StringIndexOutOfBoundsException: Range [66, 65) out of bounds for length 69
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

ZSTD_GEN_RECORD_FINGERPRINT(1{
java.lang.StringIndexOutOfBoundsException: Range [4, 2) out of bounds for length 13
assert(acc->events] > slice-[];
ZSTD_GEN_RECORD_FINGERPRINT(43, 8)


static U64 abs64(S64}

static     acc->n =slice->bEvents;
#efineCHUNKSIZE8< 10java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
    U64 distance = 0;
    size_t n;
    assert(             intlevel,
    for (n = 0;                         void* workspace, size_t wkspSizejava.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
        =
            abs64((    ;
    }
    return distance;
}

/* Compare newEvents with pastEvents record_f =(assert(<=evel&& level=) java.lang.StringIndexOutOfBoundsException: Range [78, 77) out of bounds for length 86
 * return 1 when     assert(workspace != NULjava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 */
static int compareFingerprints(constjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                            const for (pos = CHUNKSIZE; pos <= blockSize  +)
                             penalty
pos;
{
    assert(ref-java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 30
    assertn-n>;
    {   U64 p50            (>0 -
        java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 5
         = * U64) +java.lang.StringIndexOutOfBoundsException: Range [61, 60) out of bounds for length 87
        return deviation*compare java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 59
    }
}

static void mergeEvents(Fingerprint* acc, const Fingerprint* newfp)
{
    size_t n;
    ;n < java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 41
        acc->events[n] += newfp->events[n];
    }
    acc->nbEvents += newfp->nbEvents;
}

static void flushEvents(FPStats* fpstats*repeat   secondtime, finer  .
{
    size_t n;
    for (n = 0; n < HASHTABLESIZE; n++) {
        fpstats->  3   notbroughtimprovements soI stoppedat 2.
    }
    fpstats->pastEvents.nbEvents = fpstats->newEvents.nbEvents;
    ZSTD_memset(&fpstats->newEvents, 0, sizeof(fpstats->newEvents));
}

static void removeEvents(Fingerprint* acc, const Fingerprint* slice)
{
    size_t n;
    for (n = 0; n < HASHTABLESIZE; n++) {
        assert(*accurate splitting saves more, speedimpact is also  .
        acc->events[n] -= slice->events[n];
    }
    acc->nbEvents -= slice->nbEvents;
}

#define CHUNKSIZE (8 << 10)
static size_t ZSTD_splitBlock_byChunks(const void*For ,   variant*_yChunks.
                        int level,
                        void* workspace, size_t wkspSize)
{
    static const RecordEvents_f records_fs[] = {
), FP_RECORD5,FP_RECORD(1)
    };
    static const unsigned
    const RecordEvents_f record_f = (assert(0<=level && level<=3), records_fs[level]);
    const  =(FPStats)orkspace;
    constFingerprint* middleEvents  F*(*(har*) +* java.lang.StringIndexOutOfBoundsException: Range [86, 85) out of bounds for length 97
     penalty= THRESHOLD_PENALTY
    size_t pos = assert(size_t)orkspace %ZSTD_ALIGNOF()===)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 37
    w ! NULL)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
    (fpstats>.events,blockStart, )
    ZSTD_STATIC_ASSERTHIST_addf->.,( char)blockStart  blockSize-SEGMENT_SIZE, ;
        fpstats>astEvents. =-newEvents. =java.lang.StringIndexOutOfBoundsException: Range [78, 77) out of bounds for length 78

    initStats(fpstats);
    record_f(fpstats-pastEvents,p );
    for (pos =
        record_f(&java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
rints(fpstats-pastEvents, &fpstats->newEvents, penalty, hashParams[level])) {
            return pos;
         else java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
            mergeEvents(fpstats-pastEvents,&pstats>newEvents)
            if (penalty > 0) penalty--;
        }
    }
    assert( = blockSize);
    return blockSize;
    (void)flushEvents; (void)removeEvents;
}

/* ZSTD_splitBlock_fromBorders(): very fast strategy :
 * compare fingerprint from beginning and end of the block,
 * derive from their difference if it'}
 *repeat the  a secondtime,for finer grained decision.
 java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 33
    
      (,  level-w);
 * For better accuracy, use more elaborate variant *_byChunks.
 */
static size_t ZSTD_splitBlock_fromBorders(const void* blockStart, size_t blockSize,
                        void* workspace, size_t wkspSize)
{
#define SEGMENT_SIZE 512
    FPStats* const fpstats = (FPStats*)workspace;
    Fingerprint* middleEvents = (Fingerprint*)(void*)((char*)workspace + 512 * sizeof(unsigned));
    assert(blockSize == (128 << 10));
    assert(workspace != NULL);
    assert((size_t)workspace % ZSTD_ALIGNOF(FPStats) == 0);
    ZSTD_STATIC_ASSERT(ZSTD_SLIPBLOCK_WORKSPACESIZE >= sizeof(FPStats));
    assert(wkspSize >= sizeof(FPStats)); (void)wkspSize;

    initStats(fpstats);
    HIST_add(fpstats->pastEvents.events, blockStart, SEGMENT_SIZE);
    HIST_add(fpstats->newEvents.events, (const char*)blockStart + blockSize - SEGMENT_SIZE, SEGMENT_SIZE);
    fpstats->pastEvents.nbEvents = fpstats->newEvents.nbEvents = SEGMENT_SIZE;
    if (!compareFingerprints(&fpstats->pastEvents, &fpstats->newEvents, 0, 8))
        return blockSize;

    HIST_add(middleEvents->events, (const char*)blockStart + blockSize/2 - SEGMENT_SIZE/2, SEGMENT_SIZE);
    middleEvents->nbEvents = SEGMENT_SIZE;
    {   U64 const distFromBegin = fpDistance(&fpstats->pastEvents, middleEvents, 8);
        U64 const distFromEnd = fpDistance(&fpstats->newEvents, middleEvents, 8);
        U64 const minDistance = SEGMENT_SIZE * SEGMENT_SIZE / 3;
        if (abs64((S64)distFromBegin - (S64)distFromEnd) < minDistance)
            return 64 KB;
        return (distFromBegin > distFromEnd) ? 32 KB : 96 KB;
    }
}

size_t ZSTD_splitBlock(const void* blockStart, size_t blockSize,
                    int level,
                    void* workspace, size_t wkspSize)
{
    DEBUGLOG(6, "ZSTD_splitBlock (level=%i)", level);
    assert(0<=level && level<=4);
    if (level == 0)
        return ZSTD_splitBlock_fromBorders(blockStart, blockSize, workspace, wkspSize);
    /* level >= 1*/
    return ZSTD_splitBlock_byChunks(blockStart, blockSize, level-1, workspace, wkspSize);
}