/*
 * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under both the BSD-style license (found in the
 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
 * in the COPYING file in the root directory of this source tree).
 * You may select, at your option, one of the above-listed licenses.
 */

#include "zstd_lazy.h"


/*-*************************************
*  Binary Tree search
***************************************/
/** ZSTD_insertBt1() : add one or multiple positions to tree.
*   ip : assumed <= iend-8 .
*   @return : nb of positions added */
static U32 ZSTD_insertBt1(ZSTD_CCtx* zc, const BYTE* const ip, const U32 mls, const BYTE* const iend, U32 nbCompares,
                          U32 extDict)
{
    U32*   const hashTable = zc->hashTable;
    U32    const hashLog = zc->appliedParams.cParams.hashLog;
    size_t const h  = ZSTD_hashPtr(ip, hashLog, mls);
    U32*   const bt = zc->chainTable;
    U32    const btLog  = zc->appliedParams.cParams.chainLog - 1;
    U32    const btMask = (1 << btLog) - 1;
    U32 matchIndex = hashTable[h];
    size_t commonLengthSmaller=0, commonLengthLarger=0;
    const BYTE* const base = zc->base;
    const BYTE* const dictBase = zc->dictBase;
    const U32 dictLimit = zc->dictLimit;
    const BYTE* const dictEnd = dictBase + dictLimit;
    const BYTE* const prefixStart = base + dictLimit;
    const BYTE* match;
    const U32 current = (U32)(ip-base);
    const U32 btLow = btMask >= current ? 0 : current - btMask;
    U32* smallerPtr = bt + 2*(current&btMask);
    U32* largerPtr  = smallerPtr + 1;
    U32 dummy32;   /* to be nullified at the end */
    U32 const windowLow = zc->lowLimit;
    U32 matchEndIdx = current+8;
    size_t bestLength = 8;
#ifdef ZSTD_C_PREDICT
    U32 predictedSmall = *(bt + 2*((current-1)&btMask) + 0);
    U32 predictedLarge = *(bt + 2*((current-1)&btMask) + 1);
    predictedSmall += (predictedSmall>0);
    predictedLarge += (predictedLarge>0);
#endif /* ZSTD_C_PREDICT */

    assert(ip <= iend-8);   /* required for h calculation */
    hashTable[h] = current;   /* Update Hash Table */

    while (nbCompares-- && (matchIndex > windowLow)) {
        U32* const nextPtr = bt + 2*(matchIndex & btMask);
        size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger);   /* guaranteed minimum nb of common bytes */

#ifdef ZSTD_C_PREDICT   /* note : can create issues when hlog small <= 11 */
        const U32* predictPtr = bt + 2*((matchIndex-1) & btMask);   /* written this way, as bt is a roll buffer */
        if (matchIndex == predictedSmall) {
            /* no need to check length, result known */
            *smallerPtr = matchIndex;
            if (matchIndex <= btLow) { smallerPtr=&dummy32; break; }   /* beyond tree size, stop the search */
            smallerPtr = nextPtr+1;               /* new "smaller" => larger of match */
            matchIndex = nextPtr[1];              /* new matchIndex larger than previous (closer to current) */
            predictedSmall = predictPtr[1] + (predictPtr[1]>0);
            continue;
        }
        if (matchIndex == predictedLarge) {
            *largerPtr = matchIndex;
            if (matchIndex <= btLow) { largerPtr=&dummy32; break; }   /* beyond tree size, stop the search */
            largerPtr = nextPtr;
            matchIndex = nextPtr[0];
            predictedLarge = predictPtr[0] + (predictPtr[0]>0);
            continue;
        }
#endif
        if ((!extDict) || (matchIndex+matchLength >= dictLimit)) {
            match = base + matchIndex;
            if (match[matchLength] == ip[matchLength])
                matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iend) +1;
        } else {
            match = dictBase + matchIndex;
            matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart);
            if (matchIndex+matchLength >= dictLimit)
                match = base + matchIndex;   /* to prepare for next usage of match[matchLength] */
        }

        if (matchLength > bestLength) {
            bestLength = matchLength;
            if (matchLength > matchEndIdx - matchIndex)
                matchEndIdx = matchIndex + (U32)matchLength;
        }

        if (ip+matchLength == iend)   /* equal : no way to know if inf or sup */
            break;   /* drop , to guarantee consistency ; miss a bit of compression, but other solutions can corrupt tree */

        if (match[matchLength] < ip[matchLength]) {  /* necessarily within buffer */
            /* match+1 is smaller than current */
            *smallerPtr = matchIndex;             /* update smaller idx */
            commonLengthSmaller = matchLength;    /* all smaller will now have at least this guaranteed common length */
            if (matchIndex <= btLow) { smallerPtr=&dummy32; break; }   /* beyond tree size, stop searching */
            smallerPtr = nextPtr+1;               /* new "smaller" => larger of match */
            matchIndex = nextPtr[1];              /* new matchIndex larger than previous (closer to current) */
        } else {
            /* match is larger than current */
            *largerPtr = matchIndex;
            commonLengthLarger = matchLength;
            if (matchIndex <= btLow) { largerPtr=&dummy32; break; }   /* beyond tree size, stop searching */
            largerPtr = nextPtr;
            matchIndex = nextPtr[0];
    }   }

    *smallerPtr = *largerPtr = 0;
    if (bestLength > 384) return MIN(192, (U32)(bestLength - 384));   /* speed optimization */
    if (matchEndIdx > current + 8) return matchEndIdx - (current + 8);
    return 1;
}


static size_t ZSTD_insertBtAndFindBestMatch (
                        ZSTD_CCtx* zc,
                        const BYTE* const ip, const BYTE* const iend,
                        size_t* offsetPtr,
                        U32 nbCompares, const U32 mls,
                        U32 extDict)
{
    U32*   const hashTable = zc->hashTable;
    U32    const hashLog = zc->appliedParams.cParams.hashLog;
    size_t const h  = ZSTD_hashPtr(ip, hashLog, mls);
    U32*   const bt = zc->chainTable;
    U32    const btLog  = zc->appliedParams.cParams.chainLog - 1;
    U32    const btMask = (1 << btLog) - 1;
    U32 matchIndex  = hashTable[h];
    size_t commonLengthSmaller=0, commonLengthLarger=0;
    const BYTE* const base = zc->base;
    const BYTE* const dictBase = zc->dictBase;
    const U32 dictLimit = zc->dictLimit;
    const BYTE* const dictEnd = dictBase + dictLimit;
    const BYTE* const prefixStart = base + dictLimit;
    const U32 current = (U32)(ip-base);
    const U32 btLow = btMask >= current ? 0 : current - btMask;
    const U32 windowLow = zc->lowLimit;
    U32* smallerPtr = bt + 2*(current&btMask);
    U32* largerPtr  = bt + 2*(current&btMask) + 1;
    U32 matchEndIdx = current+8;
    U32 dummy32;   /* to be nullified at the end */
    size_t bestLength = 0;

    assert(ip <= iend-8);   /* required for h calculation */
    hashTable[h] = current;   /* Update Hash Table */

    while (nbCompares-- && (matchIndex > windowLow)) {
        U32* const nextPtr = bt + 2*(matchIndex & btMask);
        size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger);   /* guaranteed minimum nb of common bytes */
        const BYTE* match;

        if ((!extDict) || (matchIndex+matchLength >= dictLimit)) {
            match = base + matchIndex;
            if (match[matchLength] == ip[matchLength])
                matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iend) +1;
        } else {
            match = dictBase + matchIndex;
            matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart);
            if (matchIndex+matchLength >= dictLimit)
                match = base + matchIndex;   /* to prepare for next usage of match[matchLength] */
        }

        if (matchLength > bestLength) {
            if (matchLength > matchEndIdx - matchIndex)
                matchEndIdx = matchIndex + (U32)matchLength;
            if ( (4*(int)(matchLength-bestLength)) > (int)(ZSTD_highbit32(current-matchIndex+1) - ZSTD_highbit32((U32)offsetPtr[0]+1)) )
                bestLength = matchLength, *offsetPtr = ZSTD_REP_MOVE + current - matchIndex;
            if (ip+matchLength == iend)   /* equal : no way to know if inf or sup */
                break;   /* drop, to guarantee consistency (miss a little bit of compression) */
        }

        if (match[matchLength] < ip[matchLength]) {
            /* match is smaller than current */
            *smallerPtr = matchIndex;             /* update smaller idx */
            commonLengthSmaller = matchLength;    /* all smaller will now have at least this guaranteed common length */
            if (matchIndex <= btLow) { smallerPtr=&dummy32; break; }   /* beyond tree size, stop the search */
            smallerPtr = nextPtr+1;               /* new "smaller" => larger of match */
            matchIndex = nextPtr[1];              /* new matchIndex larger than previous (closer to current) */
        } else {
            /* match is larger than current */
            *largerPtr = matchIndex;
            commonLengthLarger = matchLength;
            if (matchIndex <= btLow) { largerPtr=&dummy32; break; }   /* beyond tree size, stop the search */
            largerPtr = nextPtr;
            matchIndex = nextPtr[0];
    }   }

    *smallerPtr = *largerPtr = 0;

    zc->nextToUpdate = (matchEndIdx > current + 8) ? matchEndIdx - 8 : current+1;
    return bestLength;
}


void ZSTD_updateTree(ZSTD_CCtx* zc, const BYTE* const ip, const BYTE* const iend, const U32 nbCompares, const U32 mls)
{
    const BYTE* const base = zc->base;
    const U32 target = (U32)(ip - base);
    U32 idx = zc->nextToUpdate;

    while(idx < target)
        idx += ZSTD_insertBt1(zc, base+idx, mls, iend, nbCompares, 0);
}

/** ZSTD_BtFindBestMatch() : Tree updater, providing best match */
static size_t ZSTD_BtFindBestMatch (
                        ZSTD_CCtx* zc,
                        const BYTE* const ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 mls)
{
    if (ip < zc->base + zc->nextToUpdate) return 0;   /* skipped area */
    ZSTD_updateTree(zc, ip, iLimit, maxNbAttempts, mls);
    return ZSTD_insertBtAndFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, mls, 0);
}


static size_t ZSTD_BtFindBestMatch_selectMLS (
                        ZSTD_CCtx* zc,   /* Index table will be updated */
                        const BYTE* ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 matchLengthSearch)
{
    switch(matchLengthSearch)
    {
    default : /* includes case 3 */
    case 4 : return ZSTD_BtFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4);
    case 5 : return ZSTD_BtFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5);
    case 7 :
    case 6 : return ZSTD_BtFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6);
    }
}


void ZSTD_updateTree_extDict(ZSTD_CCtx* zc, const BYTE* const ip, const BYTE* const iend, const U32 nbCompares, const U32 mls)
{
    const BYTE* const base = zc->base;
    const U32 target = (U32)(ip - base);
    U32 idx = zc->nextToUpdate;

    while (idx < target) idx += ZSTD_insertBt1(zc, base+idx, mls, iend, nbCompares, 1);
}


/** Tree updater, providing best match */
static size_t ZSTD_BtFindBestMatch_extDict (
                        ZSTD_CCtx* zc,
                        const BYTE* const ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 mls)
{
    if (ip < zc->base + zc->nextToUpdate) return 0;   /* skipped area */
    ZSTD_updateTree_extDict(zc, ip, iLimit, maxNbAttempts, mls);
    return ZSTD_insertBtAndFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, mls, 1);
}


static size_t ZSTD_BtFindBestMatch_selectMLS_extDict (
                        ZSTD_CCtx* zc,   /* Index table will be updated */
                        const BYTE* ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 matchLengthSearch)
{
    switch(matchLengthSearch)
    {
    default : /* includes case 3 */
    case 4 : return ZSTD_BtFindBestMatch_extDict(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4);
    case 5 : return ZSTD_BtFindBestMatch_extDict(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5);
    case 7 :
    case 6 : return ZSTD_BtFindBestMatch_extDict(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6);
    }
}



/* *********************************
*  Hash Chain
***********************************/
#define NEXT_IN_CHAIN(d, mask)   chainTable[(d) & mask]

/* Update chains up to ip (excluded)
   Assumption : always within prefix (i.e. not within extDict) */
U32 ZSTD_insertAndFindFirstIndex (ZSTD_CCtx* zc, const BYTE* ip, U32 mls)
{
    U32* const hashTable  = zc->hashTable;
    const U32 hashLog = zc->appliedParams.cParams.hashLog;
    U32* const chainTable = zc->chainTable;
    const U32 chainMask = (1 << zc->appliedParams.cParams.chainLog) - 1;
    const BYTE* const base = zc->base;
    const U32 target = (U32)(ip - base);
    U32 idx = zc->nextToUpdate;

    while(idx < target) { /* catch up */
        size_t const h = ZSTD_hashPtr(base+idx, hashLog, mls);
        NEXT_IN_CHAIN(idx, chainMask) = hashTable[h];
        hashTable[h] = idx;
        idx++;
    }

    zc->nextToUpdate = target;
    return hashTable[ZSTD_hashPtr(ip, hashLog, mls)];
}


/* inlining is important to hardwire a hot branch (template emulation) */
FORCE_INLINE_TEMPLATE
size_t ZSTD_HcFindBestMatch_generic (
                        ZSTD_CCtx* zc,   /* Index table will be updated */
                        const BYTE* const ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 mls, const U32 extDict)
{
    U32* const chainTable = zc->chainTable;
    const U32 chainSize = (1 << zc->appliedParams.cParams.chainLog);
    const U32 chainMask = chainSize-1;
    const BYTE* const base = zc->base;
    const BYTE* const dictBase = zc->dictBase;
    const U32 dictLimit = zc->dictLimit;
    const BYTE* const prefixStart = base + dictLimit;
    const BYTE* const dictEnd = dictBase + dictLimit;
    const U32 lowLimit = zc->lowLimit;
    const U32 current = (U32)(ip-base);
    const U32 minChain = current > chainSize ? current - chainSize : 0;
    int nbAttempts=maxNbAttempts;
    size_t ml=4-1;

    /* HC4 match finder */
    U32 matchIndex = ZSTD_insertAndFindFirstIndex (zc, ip, mls);

    for ( ; (matchIndex>lowLimit) & (nbAttempts>0) ; nbAttempts--) {
        const BYTE* match;
        size_t currentMl=0;
        if ((!extDict) || matchIndex >= dictLimit) {
            match = base + matchIndex;
            if (match[ml] == ip[ml])   /* potentially better */
                currentMl = ZSTD_count(ip, match, iLimit);
        } else {
            match = dictBase + matchIndex;
            if (MEM_read32(match) == MEM_read32(ip))   /* assumption : matchIndex <= dictLimit-4 (by table construction) */
                currentMl = ZSTD_count_2segments(ip+4, match+4, iLimit, dictEnd, prefixStart) + 4;
        }

        /* save best solution */
        if (currentMl > ml) {
            ml = currentMl;
            *offsetPtr = current - matchIndex + ZSTD_REP_MOVE;
            if (ip+currentMl == iLimit) break; /* best possible, avoids read overflow on next attempt */
        }

        if (matchIndex <= minChain) break;
        matchIndex = NEXT_IN_CHAIN(matchIndex, chainMask);
    }

    return ml;
}


FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_selectMLS (
                        ZSTD_CCtx* zc,
                        const BYTE* ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 matchLengthSearch)
{
    switch(matchLengthSearch)
    {
    default : /* includes case 3 */
    case 4 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4, 0);
    case 5 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5, 0);
    case 7 :
    case 6 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6, 0);
    }
}


FORCE_INLINE_TEMPLATE size_t ZSTD_HcFindBestMatch_extDict_selectMLS (
                        ZSTD_CCtx* zc,
                        const BYTE* ip, const BYTE* const iLimit,
                        size_t* offsetPtr,
                        const U32 maxNbAttempts, const U32 matchLengthSearch)
{
    switch(matchLengthSearch)
    {
    default : /* includes case 3 */
    case 4 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4, 1);
    case 5 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5, 1);
    case 7 :
    case 6 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6, 1);
    }
}


/* *******************************
*  Common parser - lazy strategy
*********************************/
FORCE_INLINE_TEMPLATE
size_t ZSTD_compressBlock_lazy_generic(ZSTD_CCtx* ctx,
                                       const void* src, size_t srcSize,
                                       const U32 searchMethod, const U32 depth)
{
    seqStore_t* seqStorePtr = &(ctx->seqStore);
    const BYTE* const istart = (const BYTE*)src;
    const BYTE* ip = istart;
    const BYTE* anchor = istart;
    const BYTE* const iend = istart + srcSize;
    const BYTE* const ilimit = iend - 8;
    const BYTE* const base = ctx->base + ctx->dictLimit;

    U32 const maxSearches = 1 << ctx->appliedParams.cParams.searchLog;
    U32 const mls = ctx->appliedParams.cParams.searchLength;

    typedef size_t (*searchMax_f)(ZSTD_CCtx* zc, const BYTE* ip, const BYTE* iLimit,
                        size_t* offsetPtr,
                        U32 maxNbAttempts, U32 matchLengthSearch);
    searchMax_f const searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS : ZSTD_HcFindBestMatch_selectMLS;
    U32 offset_1 = seqStorePtr->rep[0], offset_2 = seqStorePtr->rep[1], savedOffset=0;

    /* init */
    ip += (ip==base);
    ctx->nextToUpdate3 = ctx->nextToUpdate;
    {   U32 const maxRep = (U32)(ip-base);
        if (offset_2 > maxRep) savedOffset = offset_2, offset_2 = 0;
        if (offset_1 > maxRep) savedOffset = offset_1, offset_1 = 0;
    }

    /* Match Loop */
    while (ip < ilimit) {
        size_t matchLength=0;
        size_t offset=0;
        const BYTE* start=ip+1;

        /* check repCode */
        if ((offset_1>0) & (MEM_read32(ip+1) == MEM_read32(ip+1 - offset_1))) {
            /* repcode : we take it */
            matchLength = ZSTD_count(ip+1+4, ip+1+4-offset_1, iend) + 4;
            if (depth==0) goto _storeSequence;
        }

        /* first search (depth 0) */
        {   size_t offsetFound = 99999999;
            size_t const ml2 = searchMax(ctx, ip, iend, &offsetFound, maxSearches, mls);
            if (ml2 > matchLength)
                matchLength = ml2, start = ip, offset=offsetFound;
        }

        if (matchLength < 4) {
            ip += ((ip-anchor) >> g_searchStrength) + 1;   /* jump faster over incompressible sections */
            continue;
        }

        /* let's try to find a better solution */
        if (depth>=1)
        while (ip<ilimit) {
            ip ++;
            if ((offset) && ((offset_1>0) & (MEM_read32(ip) == MEM_read32(ip - offset_1)))) {
                size_t const mlRep = ZSTD_count(ip+4, ip+4-offset_1, iend) + 4;
                int const gain2 = (int)(mlRep * 3);
                int const gain1 = (int)(matchLength*3 - ZSTD_highbit32((U32)offset+1) + 1);
                if ((mlRep >= 4) && (gain2 > gain1))
                    matchLength = mlRep, offset = 0, start = ip;
            }
            {   size_t offset2=99999999;
                size_t const ml2 = searchMax(ctx, ip, iend, &offset2, maxSearches, mls);
                int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1));   /* raw approx */
                int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4);
                if ((ml2 >= 4) && (gain2 > gain1)) {
                    matchLength = ml2, offset = offset2, start = ip;
                    continue;   /* search a better one */
            }   }

            /* let's find an even better one */
            if ((depth==2) && (ip<ilimit)) {
                ip ++;
                if ((offset) && ((offset_1>0) & (MEM_read32(ip) == MEM_read32(ip - offset_1)))) {
                    size_t const ml2 = ZSTD_count(ip+4, ip+4-offset_1, iend) + 4;
                    int const gain2 = (int)(ml2 * 4);
                    int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 1);
                    if ((ml2 >= 4) && (gain2 > gain1))
                        matchLength = ml2, offset = 0, start = ip;
                }
                {   size_t offset2=99999999;
                    size_t const ml2 = searchMax(ctx, ip, iend, &offset2, maxSearches, mls);
                    int const gain2 = (int)(ml2*4 - ZSTD_highbit32((U32)offset2+1));   /* raw approx */
                    int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7);
                    if ((ml2 >= 4) && (gain2 > gain1)) {
                        matchLength = ml2, offset = offset2, start = ip;
                        continue;
            }   }   }
            break;  /* nothing found : store previous solution */
        }

        /* NOTE:
         * start[-offset+ZSTD_REP_MOVE-1] is undefined behavior.
         * (-offset+ZSTD_REP_MOVE-1) is unsigned, and is added to start, which
         * overflows the pointer, which is undefined behavior.
         */
        /* catch up */
        if (offset) {
            while ( (start > anchor)
                 && (start > base+offset-ZSTD_REP_MOVE)
                 && (start[-1] == (start-offset+ZSTD_REP_MOVE)[-1]) )  /* only search for offset within prefix */
                { start--; matchLength++; }
            offset_2 = offset_1; offset_1 = (U32)(offset - ZSTD_REP_MOVE);
        }
        /* store sequence */
_storeSequence:
        {   size_t const litLength = start - anchor;
            ZSTD_storeSeq(seqStorePtr, litLength, anchor, (U32)offset, matchLength-MINMATCH);
            anchor = ip = start + matchLength;
        }

        /* check immediate repcode */
        while ( (ip <= ilimit)
             && ((offset_2>0)
             & (MEM_read32(ip) == MEM_read32(ip - offset_2)) )) {
            /* store sequence */
            matchLength = ZSTD_count(ip+4, ip+4-offset_2, iend) + 4;
            offset = offset_2; offset_2 = offset_1; offset_1 = (U32)offset; /* swap repcodes */
            ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, matchLength-MINMATCH);
            ip += matchLength;
            anchor = ip;
            continue;   /* faster when present ... (?) */
    }   }

    /* Save reps for next block */
    seqStorePtr->repToConfirm[0] = offset_1 ? offset_1 : savedOffset;
    seqStorePtr->repToConfirm[1] = offset_2 ? offset_2 : savedOffset;

    /* Return the last literals size */
    return iend - anchor;
}


size_t ZSTD_compressBlock_btlazy2(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
{
    return ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 1, 2);
}

size_t ZSTD_compressBlock_lazy2(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
{
    return ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 2);
}

size_t ZSTD_compressBlock_lazy(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
{
    return ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 1);
}

size_t ZSTD_compressBlock_greedy(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
{
    return ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 0);
}


FORCE_INLINE_TEMPLATE
size_t ZSTD_compressBlock_lazy_extDict_generic(ZSTD_CCtx* ctx,
                                     const void* src, size_t srcSize,
                                     const U32 searchMethod, const U32 depth)
{
    seqStore_t* seqStorePtr = &(ctx->seqStore);
    const BYTE* const istart = (const BYTE*)src;
    const BYTE* ip = istart;
    const BYTE* anchor = istart;
    const BYTE* const iend = istart + srcSize;
    const BYTE* const ilimit = iend - 8;
    const BYTE* const base = ctx->base;
    const U32 dictLimit = ctx->dictLimit;
    const U32 lowestIndex = ctx->lowLimit;
    const BYTE* const prefixStart = base + dictLimit;
    const BYTE* const dictBase = ctx->dictBase;
    const BYTE* const dictEnd  = dictBase + dictLimit;
    const BYTE* const dictStart  = dictBase + ctx->lowLimit;

    const U32 maxSearches = 1 << ctx->appliedParams.cParams.searchLog;
    const U32 mls = ctx->appliedParams.cParams.searchLength;

    typedef size_t (*searchMax_f)(ZSTD_CCtx* zc, const BYTE* ip, const BYTE* iLimit,
                        size_t* offsetPtr,
                        U32 maxNbAttempts, U32 matchLengthSearch);
    searchMax_f searchMax =
# SOME DESCRIPTIVE TITLE.
# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
# This file is distributed under the same license as the PACKAGE package.
# 
# Translators:
msgid ""
msgstr ""
"Project-Id-Version: ownCloud\n"
"Report-Msgid-Bugs-To: translations@owncloud.org\n"
"POT-Creation-Date: 2014-05-15 01:54-0400\n"
"PO-Revision-Date: 2014-05-15 05:54+0000\n"
"Last-Translator: I Robot\n"
"Language-Team: Spanish (Peru) (http://www.transifex.com/projects/p/owncloud/language/es_PE/)\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Language: es_PE\n"
"Plural-Forms: nplurals=2; plural=(n != 1);\n"

#: ajax/share.php:87
msgid "Expiration date is in the past."
msgstr ""

#: ajax/share.php:119 ajax/share.php:161
#, php-format
msgid "Couldn't send mail to following users: %s "
msgstr ""

#: ajax/update.php:10
msgid "Turned on maintenance mode"
msgstr ""

#: ajax/update.php:13
msgid "Turned off maintenance mode"
msgstr ""

#: ajax/update.php:16
msgid "Updated database"
msgstr ""

#: avatar/controller.php:62
msgid "No image or file provided"
msgstr ""

#: avatar/controller.php:81
msgid "Unknown filetype"
msgstr ""

#: avatar/controller.php:85
msgid "Invalid image"
msgstr ""

#: avatar/controller.php:115 avatar/controller.php:142
msgid "No temporary profile picture available, try again"
msgstr ""

#: avatar/controller.php:135
msgid "No crop data provided"
msgstr ""

#: js/config.php:43
msgid "Sunday"
msgstr ""

#: js/config.php:44
msgid "Monday"
msgstr ""

#: js/config.php:45
msgid "Tuesday"
msgstr ""

#: js/config.php:46
msgid "Wednesday"
msgstr ""

#: js/config.php:47
msgid "Thursday"
msgstr ""

#: js/config.php:48
msgid "Friday"
msgstr ""

#: js/config.php:49
msgid "Saturday"
msgstr ""

#: js/config.php:54
msgid "January"
msgstr ""

#: js/config.php:55
msgid "February"
msgstr ""

#: js/config.php:56
msgid "March"
msgstr ""

#: js/config.php:57
msgid "April"
msgstr ""

#: js/config.php:58
msgid "May"
msgstr ""

#: js/config.php:59
msgid "June"
msgstr ""

#: js/config.php:60
msgid "July"
msgstr ""

#: js/config.php:61
msgid "August"
msgstr ""

#: js/config.php:62
msgid "September"
msgstr ""

#: js/config.php:63
msgid "October"
msgstr ""

#: js/config.php:64
msgid "November"
msgstr ""

#: js/config.php:65
msgid "December"
msgstr ""

#: js/js.js:483
msgid "Settings"
msgstr ""

#: js/js.js:583
msgid "Saving..."
msgstr ""

#: js/js.js:1240
msgid "seconds ago"
msgstr ""

#: js/js.js:1241
msgid "%n minute ago"
msgid_plural "%n minutes ago"
msgstr[0] ""
msgstr[1] ""

#: js/js.js:1242
msgid "%n hour ago"
msgid_plural "%n hours ago"
msgstr[0] ""
msgstr[1] ""

#: js/js.js:1243
msgid "today"
msgstr ""

#: js/js.js:1244
msgid "yesterday"
msgstr ""

#: js/js.js:1245
msgid "%n day ago"
msgid_plural "%n days ago"
msgstr[0] ""
msgstr[1] ""

#: js/js.js:1246
msgid "last month"
msgstr ""

#: js/js.js:1247
msgid "%n month ago"
msgid_plural "%n months ago"
msgstr[0] ""
msgstr[1] ""

#: js/js.js:1248
msgid "last year"
msgstr ""

#: js/js.js:1249
msgid "years ago"
msgstr ""

#: js/oc-dialogs.js:95 js/oc-dialogs.js:236
msgid "Yes"
msgstr ""

#: js/oc-dialogs.js:105 js/oc-dialogs.js:246
msgid "No"
msgstr ""

#: js/oc-dialogs.js:184
msgid "Choose"
msgstr ""

#: js/oc-dialogs.js:210
msgid "Error loading file picker template: {error}"
msgstr ""

#: js/oc-dialogs.js:263
msgid "Ok"
msgstr ""

#: js/oc-dialogs.js:283
msgid "Error loading message template: {error}"
msgstr ""

#: js/oc-dialogs.js:411
msgid "{count} file conflict"
msgid_plural "{count} file conflicts"
msgstr[0] ""
msgstr[1] ""

#: js/oc-dialogs.js:425
msgid "One file conflict"
msgstr ""

#: js/oc-dialogs.js:431
msgid "New Files"
msgstr ""

#: js/oc-dialogs.js:432
msgid "Already existing files"
msgstr ""

#: js/oc-dialogs.js:434
msgid "Which files do you want to keep?"
msgstr ""

#: js/oc-dialogs.js:435
msgid ""
"If you select both versions, the copied file will have a number added to its"
" name."
msgstr ""

#: js/oc-dialogs.js:443
msgid "Cancel"
msgstr ""

#: js/oc-dialogs.js:453
msgid "Continue"
msgstr ""

#: js/oc-dialogs.js:500 js/oc-dialogs.js:513
msgid "(all selected)"
msgstr ""

#: js/oc-dialogs.js:503 js/oc-dialogs.js:517
msgid "({count} selected)"
msgstr ""

#: js/oc-dialogs.js:525
msgid "Error loading file exists template"
msgstr ""

#: js/setup.js:84
msgid "Very weak password"
msgstr ""

#: js/setup.js:85
msgid "Weak password"
msgstr ""

#: js/setup.js:86
msgid "So-so password"
msgstr ""

#: js/setup.js:87
msgid "Good password"
msgstr ""

#: js/setup.js:88
msgid "Strong password"
msgstr ""

#: js/share.js:51 js/share.js:66 js/share.js:106
msgid "Shared"
msgstr ""

#: js/share.js:109
msgid "Share"
msgstr ""

#: js/share.js:158 js/share.js:171 js/share.js:178 js/share.js:747
#: templates/installation.php:10
msgid "Error"
msgstr ""

#: js/share.js:160 js/share.js:810
msgid "Error while sharing"
msgstr ""

#: js/share.js:171
msgid "Error while unsharing"
msgstr ""

#: js/share.js:178
msgid "Error while changing permissions"
msgstr ""

#: js/share.js:188
msgid "Shared with you and the group {group} by {owner}"
msgstr ""

#: js/share.js:190
msgid "Shared with you by {owner}"
msgstr ""

#: js/share.js:214
msgid "Share with user or group …"
msgstr ""

#: js/share.js:220
msgid "Share link"
msgstr ""

#: js/share.js:226
msgid ""
"The public link will expire no later than {days} days after it is created"
msgstr ""

#: js/share.js:228
msgid "By default the public link will expire after {days} days"
msgstr ""

#: js/share.js:234
msgid "Password protect"
msgstr ""

#: js/share.js:236 templates/installation.php:60 templates/login.php:40
msgid "Password"
msgstr ""

#: js/share.js:241
msgid "Allow Public Upload"
msgstr ""

#: js/share.js:245
msgid "Email link to person"
msgstr ""

#: js/share.js:246
msgid "Send"
msgstr ""

#: js/share.js:251
msgid "Set expiration date"
msgstr ""

#: js/share.js:252
msgid "Expiration date"
msgstr ""

#: js/share.js:289
msgid "Share via email:"
msgstr ""

#: js/share.js:292
msgid "No people found"
msgstr ""

#: js/share.js:336 js/share.js:397
msgid "group"
msgstr ""

#: js/share.js:369
msgid "Resharing is not allowed"
msgstr ""

#: js/share.js:413
msgid "Shared in {item} with {user}"
msgstr ""

#: js/share.js:435
msgid "Unshare"
msgstr ""

#: js/share.js:443
msgid "notify by email"
msgstr ""

#: js/share.js:446
msgid "can edit"
msgstr ""

#: js/share.js:448
msgid "access control"
msgstr ""

#: js/share.js:451
msgid "create"
msgstr ""

#: js/share.js:454
msgid "update"
msgstr ""

#: js/share.js:457
msgid "delete"
msgstr ""

#: js/share.js:460
msgid "share"
msgstr ""

#: js/share.js:734
msgid "Password protected"
msgstr ""

#: js/share.js:747
msgid "Error unsetting expiration date"
msgstr ""

#: js/share.js:768
msgid "Error setting expiration date"
msgstr ""

#: js/share.js:797
msgid "Sending ..."
msgstr ""

#: js/share.js:808
msgid "Email sent"
msgstr ""

#: js/share.js:832
msgid "Warning"
msgstr ""

#: js/tags.js:4
msgid "The object type is not specified."
msgstr ""

#: js/tags.js:13
msgid "Enter new"
msgstr ""

#: js/tags.js:27
msgid "Delete"
msgstr ""

#: js/tags.js:31
msgid "Add"
msgstr ""

#: js/tags.js:39
msgid "Edit tags"
msgstr ""

#: js/tags.js:57
msgid "Error loading dialog template: {error}"
msgstr ""

#: js/tags.js:264
msgid "No tags selected for deletion."
msgstr ""

#: js/update.js:8
msgid "Please reload the page."
msgstr ""

#: js/update.js:17
msgid ""
"The update was unsuccessful. Please report this issue to the <a "
"href=\"https://github.com/owncloud/core/issues\" target=\"_blank\">ownCloud "
"community</a>."
msgstr ""

#: js/update.js:21
msgid "The update was successful. Redirecting you to ownCloud now."
msgstr ""

#: lostpassword/controller.php:70
#, php-format
msgid "%s password reset"
msgstr ""

#: lostpassword/controller.php:72
msgid ""
"A problem has occurred whilst sending the email, please contact your "
"administrator."
msgstr ""

#: lostpassword/templates/email.php:2
msgid "Use the following link to reset your password: {link}"
msgstr ""

#: lostpassword/templates/lostpassword.php:7
msgid ""
"The link to reset your password has been sent to your email.<br>If you do "
"not receive it within a reasonable amount of time, check your spam/junk "
"folders.<br>If it is not there ask your local administrator ."
msgstr ""

#: lostpassword/templates/lostpassword.php:15
msgid "Request failed!<br>Did you make sure your email/username was right?"
msgstr ""

#: lostpassword/templates/lostpassword.php:18
msgid "You will receive a link to reset your password via Email."
msgstr ""

#: lostpassword/templates/lostpassword.php:21 templates/installation.php:53
#: templates/login.php:32
msgid "Username"
msgstr ""

#: lostpassword/templates/lostpassword.php:25
msgid ""
"Your files are encrypted. If you haven't enabled the recovery key, there "
"will be no way to get your data back after your password is reset. If you "
"are not sure what to do, please contact your administrator before you "
"continue. Do you really want to continue?"
msgstr ""

#: lostpassword/templates/lostpassword.php:27
msgid "Yes, I really want to reset my password now"
msgstr ""

#: lostpassword/templates/lostpassword.php:30
msgid "Reset"
msgstr ""

#: lostpassword/templates/resetpassword.php:4
msgid "Your password was reset"
msgstr ""

#: lostpassword/templates/resetpassword.php:5
msgid "To login page"
msgstr ""

#: lostpassword/templates/resetpassword.php:8
msgid "New password"
msgstr ""

#: lostpassword/templates/resetpassword.php:11
msgid "Reset password"
msgstr ""

#: setup/controller.php:140
#, php-format
msgid ""
"Mac OS X is not supported and %s will not work properly on this platform. "
"Use it at your own risk! "
msgstr ""

#: setup/controller.php:144
msgid ""
"For the best results, please consider using a GNU/Linux server instead."
msgstr ""

#: strings.php:5
msgid "Personal"
msgstr ""

#: strings.php:6
msgid "Users"
msgstr ""

#: strings.php:7 templates/layout.user.php:116
msgid "Apps"
msgstr ""

#: strings.php:8
msgid "Admin"
msgstr ""

#: strings.php:9
msgid "Help"
msgstr ""

#: tags/controller.php:22
msgid "Error loading tags"
msgstr ""

#: tags/controller.php:48
msgid "Tag already exists"
msgstr ""

#: tags/controller.php:64
msgid "Error deleting tag(s)"
msgstr ""

#: tags/controller.php:75
msgid "Error tagging"
msgstr ""

#: tags/controller.php:86
msgid "Error untagging"
msgstr ""

#: tags/controller.php:97
msgid "Error favoriting"
msgstr ""

#: tags/controller.php:108
msgid "Error unfavoriting"
msgstr ""

#: templates/403.php:12
msgid "Access forbidden"
msgstr ""

#: templates/404.php:15
msgid "Cloud not found"
msgstr ""

#: templates/altmail.php:2
#, php-format
msgid ""
"Hey there,\n"
"\n"
"just letting you know that %s shared %s with you.\n"
"View it: %s\n"
"\n"
msgstr ""

#: templates/altmail.php:4 templates/mail.php:17
#, php-format
msgid "The share will expire on %s."
msgstr ""

#: templates/altmail.php:7 templates/mail.php:20
msgid "Cheers!"
msgstr ""

#: templates/installation.php:25 templates/installation.php:32
#: templates/installation.php:39
msgid "Security Warning"
msgstr ""

#: templates/installation.php:26
msgid "Your PHP version is vulnerable to the NULL Byte attack (CVE-2006-7243)"
msgstr ""

#: templates/installation.php:27
#, php-format
msgid "Please update your PHP installation to use %s securely."
msgstr ""

#: templates/installation.php:33
msgid ""
"No secure random number generator is available, please enable the PHP "
"OpenSSL extension."
msgstr ""

#: templates/installation.php:34
msgid ""
"Without a secure random number generator an attacker may be able to predict "
"password reset tokens and take over your account."
msgstr ""

#: templates/installation.php:40
msgid ""
"Your data directory and files are probably accessible from the internet "
"because the .htaccess file does not work."
msgstr ""

#: templates/installation.php:42
#, php-format
msgid ""
"For information how to properly configure your server, please see the <a "
"href=\"%s\" target=\"_blank\">documentation</a>."
msgstr ""

#: templates/installation.php:48
msgid "Create an <strong>admin account</strong>"
msgstr ""

#: templates/installation.php:70
msgid "Storage & database"
msgstr ""

#: templates/installation.php:77
msgid "Data folder"
msgstr ""

#: templates/installation.php:90
msgid "Configure the database"
msgstr ""

#: templates/installation.php:94
msgid "will be used"
msgstr ""

#: templates/installation.php:109
msgid "Database user"
msgstr ""

#: templates/installation.php:118
msgid "Database password"
msgstr ""

#: templates/installation.php:123
msgid "Database name"
msgstr ""

#: templates/installation.php:132
msgid "Database tablespace"
msgstr ""

#: templates/installation.php:140
msgid "Database host"
msgstr ""

#: templates/installation.php:150
msgid "Finish setup"
msgstr ""

#: templates/installation.php:150
msgid "Finishing …"
msgstr ""

#: templates/layout.user.php:40
msgid ""
"This application requires JavaScript to be enabled for correct operation.  "
"Please <a href=\"http://enable-javascript.com/\" target=\"_blank\">enable "
"JavaScript</a> and re-load this interface."
msgstr ""

#: templates/layout.user.php:44
#, php-format
msgid "%s is available. Get more information on how to update."
msgstr ""

#: templates/layout.user.php:74 templates/singleuser.user.php:8
msgid "Log out"
msgstr ""

#: templates/login.php:9
msgid "Automatic logon rejected!"
msgstr ""

#: templates/login.php:10
msgid ""
"If you did not change your password recently, your account may be "
"compromised!"
msgstr ""

#: templates/login.php:12
msgid "Please change your password to secure your account again."
msgstr ""

#: templates/login.php:17
msgid "Server side authentication failed!"
msgstr ""

#: templates/login.php:18
msgid "Please contact your administrator."
msgstr ""

#: templates/login.php:46
msgid "Lost your password?"
msgstr ""

#: templates/login.php:51
msgid "remember"
msgstr ""

#: templates/login.php:54
msgid "Log in"
msgstr ""

#: templates/login.php:60
msgid "Alternative Logins"
msgstr ""

#: templates/mail.php:15
#, php-format
msgid ""
"Hey there,<br><br>just letting you know that %s shared <strong>%s</strong> "
"with you.<br><a href=\"%s\">View it!</a><br><br>"
msgstr ""

#: templates/singleuser.user.php:3
msgid "This ownCloud instance is currently in single user mode."
msgstr ""

#: templates/singleuser.user.php:4
msgid "This means only administrators can use the instance."
msgstr ""

#: templates/singleuser.user.php:5 templates/update.user.php:5
msgid ""
"Contact your system administrator if this message persists or appeared "
"unexpectedly."
msgstr ""

#: templates/singleuser.user.php:7 templates/update.user.php:6
msgid "Thank you for your patience."
msgstr ""

#: templates/update.admin.php:3
#, php-format
msgid "Updating ownCloud to version %s, this may take a while."
msgstr ""

#: templates/update.user.php:3
msgid ""
"This ownCloud instance is currently being updated, which may take a while."
msgstr ""

#: templates/update.user.php:4
msgid "Please reload this page after a short time to continue using ownCloud."
msgstr ""