+/* *************************************
+* Binary Tree search
+***************************************/
FORCE_INLINE /* inlining is important to hardwire a hot branch (template emulation) */
U32 ZSTD_insertBtAndGetAllMatches (
ZSTD_CCtx* zc,
}
}
+/** Tree updater, providing best match */
+FORCE_INLINE /* inlining is important to hardwire a hot branch (template emulation) */
+size_t ZSTD_BtGetAllMatches_extDict (
+ ZSTD_CCtx* zc,
+ const BYTE* const ip, const BYTE* const iLimit,
+ const U32 maxNbAttempts, const U32 mls, ZSTD_match_t* matches, U32 minml)
+{
+ if (ip < zc->base + zc->nextToUpdate) return 0; /* skipped area */
+ ZSTD_updateTree_extDict(zc, ip, iLimit, maxNbAttempts, mls);
+ return ZSTD_insertBtAndGetAllMatches(zc, ip, iLimit, maxNbAttempts, mls, 1, matches, minml);
+}
+
+
+FORCE_INLINE U32 ZSTD_BtGetAllMatches_selectMLS_extDict (
+ ZSTD_CCtx* zc, /* Index table will be updated */
+ const BYTE* ip, const BYTE* const iLowLimit, const BYTE* const iHighLimit,
+ const U32 maxNbAttempts, const U32 matchLengthSearch, ZSTD_match_t* matches, U32 minml)
+{
+ if (iLowLimit) {}; // skip warnings
+ switch(matchLengthSearch)
+ {
+ default :
+ case 4 : return ZSTD_BtGetAllMatches_extDict(zc, ip, iHighLimit, maxNbAttempts, 4, matches, minml);
+ case 5 : return ZSTD_BtGetAllMatches_extDict(zc, ip, iHighLimit, maxNbAttempts, 5, matches, minml);
+ case 6 : return ZSTD_BtGetAllMatches_extDict(zc, ip, iHighLimit, maxNbAttempts, 6, matches, minml);
+ }
+}
+
+
+/* ***********************
+* Hash Chain
+*************************/
FORCE_INLINE /* inlining is important to hardwire a hot branch (template emulation) */
U32 ZSTD_HcGetAllMatches_generic (
ZSTD_CCtx* zc, /* Index table will be updated */
const U32 dictLimit = zc->dictLimit;
const BYTE* const prefixStart = base + dictLimit;
const BYTE* const dictEnd = dictBase + dictLimit;
+ const BYTE* const dictStart = dictBase + zc->lowLimit;
const U32 lowLimit = zc->lowLimit;
const U32 current = (U32)(ip-base);
const U32 minChain = current > chainSize ? current - chainSize : 0;
if (MEM_read32(match) == MEM_read32(ip)) /* assumption : matchIndex <= dictLimit-4 (by table construction) */
currentMl = ZSTD_count_2segments(ip+MINMATCH, match+MINMATCH, iHighLimit, dictEnd, prefixStart) + MINMATCH;
if (currentMl > 0) {
- while ((match-back > dictBase) && (ip-back > iLowLimit) && (ip[-back-1] == match[-back-1])) back++; /* backward match extension */
+ while ((match-back > dictStart) && (ip-back > iLowLimit) && (ip[-back-1] == match[-back-1])) back++; /* backward match extension */
currentMl += back;
}
}
}
}
+FORCE_INLINE U32 ZSTD_HcGetAllMatches_selectMLS_extDict (
+ ZSTD_CCtx* zc,
+ const BYTE* ip, const BYTE* const iLowLimit, const BYTE* const iHighLimit,
+ const U32 maxNbAttempts, const U32 matchLengthSearch, ZSTD_match_t* matches, U32 minml)
+{
+ switch(matchLengthSearch)
+ {
+ default :
+ case 4 : return ZSTD_HcGetAllMatches_generic(zc, ip, iLowLimit, iHighLimit, maxNbAttempts, 4, 1, matches, minml);
+ case 5 : return ZSTD_HcGetAllMatches_generic(zc, ip, iLowLimit, iHighLimit, maxNbAttempts, 5, 1, matches, minml);
+ case 6 : return ZSTD_HcGetAllMatches_generic(zc, ip, iLowLimit, iHighLimit, maxNbAttempts, 6, 1, matches, minml);
+ }
+}
/* *******************************
ZSTD_LOG_PARSER("%d: match_num=%d last_pos=%d\n", (int)(ip-base), match_num, last_pos);
if (!last_pos && !match_num) { ip++; continue; }
- opt[0].rep = rep_1;
- opt[0].rep2 = rep_2;
- opt[0].mlen = 1;
+ opt[0].rep = rep_1;
+ opt[0].rep2 = rep_2;
+ opt[0].mlen = 1;
if (match_num && matches[match_num-1].len > sufficient_len)
{
+FORCE_INLINE
+void ZSTD_compressBlock_opt_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 BYTE* const prefixStart = base + dictLimit;
+ const BYTE* const dictBase = ctx->dictBase;
+ const BYTE* const dictEnd = dictBase + dictLimit;
+
+ U32 rep_2=REPCODE_STARTVALUE, rep_1=REPCODE_STARTVALUE;
+ const U32 maxSearches = 1U << ctx->params.searchLog;
+ const U32 mls = ctx->params.searchLength;
+
+ typedef U32 (*getAllMatches_f)(ZSTD_CCtx* zc, const BYTE* ip, const BYTE* iLowLimit, const BYTE* iHighLimit,
+ U32 maxNbAttempts, U32 matchLengthSearch, ZSTD_match_t* matches, U32 minml);
+ getAllMatches_f getAllMatches = searchMethod ? ZSTD_BtGetAllMatches_selectMLS_extDict : ZSTD_HcGetAllMatches_selectMLS_extDict;
+
+ ZSTD_optimal_t opt[ZSTD_OPT_NUM+4];
+ ZSTD_match_t matches[ZSTD_OPT_NUM+1];
+ const uint8_t *inr;
+ U32 skip_num, cur, cur2, match_num, last_pos, litlen, price;
+
+ const U32 sufficient_len = ctx->params.sufficientLength;
+ const U32 faster_get_matches = (ctx->params.strategy == ZSTD_opt);
+
+
+ /* init */
+ ZSTD_resetSeqStore(seqStorePtr);
+ if ((ip - prefixStart) < REPCODE_STARTVALUE) ip += REPCODE_STARTVALUE;
+
+
+ /* Match Loop */
+ while (ip < ilimit) {
+ U32 mlen=0;
+ U32 best_mlen=0;
+ U32 best_off=0;
+ U32 current = (U32)(ip-base);
+ memset(opt, 0, sizeof(ZSTD_optimal_t));
+ last_pos = 0;
+ inr = ip;
+ opt[0].litlen = (U32)(ip - anchor);
+
+
+ /* check repCode */
+ {
+ const U32 repIndex = (U32)(current+1 - rep_1);
+ const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
+ const BYTE* const repMatch = repBase + repIndex;
+ if ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow */
+ if (MEM_read32(ip+1) == MEM_read32(repMatch)) {
+ /* repcode detected we should take it */
+ const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
+ mlen = (U32)ZSTD_count_2segments(ip+1+MINMATCH, repMatch+MINMATCH, iend, repEnd, prefixStart) + MINMATCH;
+
+ ZSTD_LOG_PARSER("%d: start try REP rep=%d mlen=%d\n", (int)(ip-base), (int)rep_1, (int)mlen);
+ if (depth==0 || mlen > sufficient_len || mlen >= ZSTD_OPT_NUM) {
+ ip+=1; best_mlen = mlen; best_off = 0; cur = 0; last_pos = 1;
+ goto _storeSequence;
+ }
+
+ litlen = opt[0].litlen + 1;
+ do
+ {
+ price = ZSTD_getPrice(seqStorePtr, litlen, anchor, 0, mlen - MINMATCH);
+ if (mlen + 1 > last_pos || price < opt[mlen + 1].price)
+ SET_PRICE(mlen + 1, mlen, 0, litlen, price);
+ mlen--;
+ }
+ while (mlen >= MINMATCH);
+ }
+ }
+
+ best_mlen = (last_pos) ? last_pos : MINMATCH;
+
+ if (faster_get_matches && last_pos)
+ match_num = 0;
+ else
+ match_num = getAllMatches(ctx, ip, ip, iend, maxSearches, mls, matches, best_mlen); /* first search (depth 0) */
+
+ ZSTD_LOG_PARSER("%d: match_num=%d last_pos=%d\n", (int)(ip-base), match_num, last_pos);
+ if (!last_pos && !match_num) { ip++; continue; }
+
+ opt[0].rep = rep_1;
+ opt[0].rep2 = rep_2;
+ opt[0].mlen = 1;
+
+ if (match_num && matches[match_num-1].len > sufficient_len)
+ {
+ best_mlen = matches[match_num-1].len;
+ best_off = matches[match_num-1].off;
+ cur = 0;
+ last_pos = 1;
+ goto _storeSequence;
+ }
+
+ // set prices using matches at position = 0
+ for (U32 i = 0; i < match_num; i++)
+ {
+ mlen = (i>0) ? matches[i-1].len+1 : best_mlen;
+ best_mlen = (matches[i].len < ZSTD_OPT_NUM) ? matches[i].len : ZSTD_OPT_NUM;
+ ZSTD_LOG_PARSER("%d: start Found mlen=%d off=%d best_mlen=%d last_pos=%d\n", (int)(ip-base), matches[i].len, matches[i].off, (int)best_mlen, (int)last_pos);
+ litlen = opt[0].litlen;
+ while (mlen <= best_mlen)
+ {
+ price = ZSTD_getPrice(seqStorePtr, litlen, anchor, matches[i].off, mlen - MINMATCH);
+ if (mlen > last_pos || price < opt[mlen].price)
+ SET_PRICE(mlen, mlen, matches[i].off, litlen, price);
+ mlen++;
+ }
+ }
+
+ if (last_pos < MINMATCH) {
+ // ip += ((ip-anchor) >> g_searchStrength) + 1; /* jump faster over incompressible sections */
+ ip++; continue;
+ }
+
+
+ // check further positions
+ for (skip_num = 0, cur = 1; cur <= last_pos; cur++)
+ {
+ inr = ip + cur;
+
+ if (opt[cur-1].mlen == 1)
+ {
+ litlen = opt[cur-1].litlen + 1;
+ if (cur > litlen)
+ {
+ price = opt[cur - litlen].price + ZSTD_getLiteralPrice(seqStorePtr, litlen, inr-litlen);
+ ZSTD_LOG_TRY_PRICE("%d: TRY1 opt[%d].price=%d price=%d cur=%d litlen=%d\n", (int)(inr-base), cur - litlen, opt[cur - litlen].price, price, cur, litlen);
+ }
+ else
+ price = ZSTD_getLiteralPrice(seqStorePtr, litlen, anchor);
+ }
+ else
+ {
+ litlen = 1;
+ price = opt[cur - 1].price + ZSTD_getLiteralPrice(seqStorePtr, litlen, inr-1);
+ ZSTD_LOG_TRY_PRICE("%d: TRY3 price=%d cur=%d litlen=%d litonly=%d\n", (int)(inr-base), price, cur, litlen, (int)ZSTD_getLiteralPrice(seqStorePtr, litlen, inr-1));
+ }
+
+ ZSTD_LOG_TRY_PRICE("%d: TRY4 price=%d opt[%d].price=%d\n", (int)(inr-base), price, cur, opt[cur].price);
+
+ if (cur > last_pos || price <= opt[cur].price) // || ((price == opt[cur].price) && (opt[cur-1].mlen == 1) && (cur != litlen)))
+ SET_PRICE(cur, 1, 0, litlen, price);
+
+ if (cur == last_pos) break;
+
+ if (inr > ilimit) // last match must start at a minimum distance of 8 from oend
+ continue;
+
+ mlen = opt[cur].mlen;
+
+ if (opt[cur-mlen].off)
+ {
+ opt[cur].rep2 = opt[cur-mlen].rep;
+ opt[cur].rep = opt[cur-mlen].off;
+ ZSTD_LOG_PARSER("%d: COPYREP1 cur=%d mlen=%d rep=%d rep2=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep, opt[cur].rep2);
+ }
+ else
+ {
+ if (cur!=mlen && opt[cur-mlen].litlen == 0)
+ {
+ opt[cur].rep2 = opt[cur-mlen].rep;
+ opt[cur].rep = opt[cur-mlen].rep2;
+ ZSTD_LOG_PARSER("%d: COPYREP2 cur=%d mlen=%d rep=%d rep2=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep, opt[cur].rep2);
+ }
+ else
+ {
+ opt[cur].rep2 = opt[cur-mlen].rep2;
+ opt[cur].rep = opt[cur-mlen].rep;
+ ZSTD_LOG_PARSER("%d: COPYREP3 cur=%d mlen=%d rep=%d rep2=%d\n", (int)(inr-base), cur, mlen, opt[cur].rep, opt[cur].rep2);
+ }
+ }
+
+ ZSTD_LOG_PARSER("%d: CURRENT price[%d/%d]=%d off=%d mlen=%d litlen=%d rep=%d rep2=%d\n", (int)(inr-base), cur, last_pos, opt[cur].price, opt[cur].off, opt[cur].mlen, opt[cur].litlen, opt[cur].rep, opt[cur].rep2);
+
+
+
+ size_t cur_rep;
+ best_mlen = 0;
+
+ if (!opt[cur].off && opt[cur].mlen != 1) {
+ cur_rep = opt[cur].rep2;
+ ZSTD_LOG_PARSER("%d: try REP2 rep2=%d mlen=%d\n", (int)(inr-base), cur_rep, mlen);
+ }
+ else {
+ cur_rep = opt[cur].rep;
+ ZSTD_LOG_PARSER("%d: try REP1 rep=%d mlen=%d\n", (int)(inr-base), cur_rep, mlen);
+ }
+
+ const U32 repIndex = (U32)(current+cur - cur_rep);
+ const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
+ const BYTE* const repMatch = repBase + repIndex;
+ if ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow */
+ if (MEM_read32(inr) == MEM_read32(repMatch)) {
+ /* repcode detected */
+ const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
+ mlen = (U32)ZSTD_count_2segments(inr+MINMATCH, repMatch+MINMATCH, iend, repEnd, prefixStart) + MINMATCH;
+ ZSTD_LOG_PARSER("%d: Found REP mlen=%d off=%d rep=%d opt[%d].off=%d\n", (int)(inr-base), mlen, 0, opt[cur].rep, cur, opt[cur].off);
+
+ if (mlen > sufficient_len || cur + mlen >= ZSTD_OPT_NUM)
+ {
+ best_mlen = mlen;
+ best_off = 0;
+ ZSTD_LOG_PARSER("%d: REP sufficient_len=%d best_mlen=%d best_off=%d last_pos=%d\n", (int)(inr-base), sufficient_len, best_mlen, best_off, last_pos);
+ last_pos = cur + 1;
+ goto _storeSequence;
+ }
+
+ if (opt[cur].mlen == 1)
+ {
+ litlen = opt[cur].litlen;
+
+ if (cur > litlen)
+ {
+ price = opt[cur - litlen].price + ZSTD_getPrice(seqStorePtr, litlen, inr-litlen, 0, mlen - MINMATCH);
+ ZSTD_LOG_TRY_PRICE("%d: TRY5 opt[%d].price=%d price=%d cur=%d litlen=%d\n", (int)(inr-base), cur - litlen, opt[cur - litlen].price, price, cur, litlen);
+ }
+ else
+ price = ZSTD_getPrice(seqStorePtr, litlen, anchor, 0, mlen - MINMATCH);
+ }
+ else
+ {
+ litlen = 0;
+ price = opt[cur].price + ZSTD_getPrice(seqStorePtr, 0, NULL, 0, mlen - MINMATCH);
+ ZSTD_LOG_TRY_PRICE("%d: TRY7 price=%d cur=%d litlen=0 getprice=%d\n", (int)(inr-base), price, cur, (int)ZSTD_getPrice(seqStorePtr, 0, NULL, 0, mlen - MINMATCH));
+ }
+
+ best_mlen = mlen;
+ if (faster_get_matches)
+ skip_num = best_mlen;
+
+ ZSTD_LOG_PARSER("%d: Found REP mlen=%d off=%d price=%d litlen=%d price[%d]=%d\n", (int)(inr-base), mlen, 0, price, litlen, cur - litlen, opt[cur - litlen].price);
+
+ do
+ {
+ if (cur + mlen > last_pos || price <= opt[cur + mlen].price) // || ((price == opt[cur + mlen].price) && (opt[cur].mlen == 1) && (cur != litlen))) // at equal price prefer REP instead of MATCH
+ SET_PRICE(cur + mlen, mlen, 0, litlen, price);
+ mlen--;
+ }
+ while (mlen >= MINMATCH);
+ }
+
+
+ if (faster_get_matches && skip_num > 0)
+ {
+ skip_num--;
+ continue;
+ }
+
+
+ best_mlen = (best_mlen > MINMATCH) ? best_mlen : MINMATCH;
+
+ match_num = getAllMatches(ctx, inr, ip, iend, maxSearches, mls, matches, best_mlen);
+ ZSTD_LOG_PARSER("%d: ZSTD_GetAllMatches match_num=%d\n", (int)(inr-base), match_num);
+
+
+ if (match_num > 0 && matches[match_num-1].len > sufficient_len)
+ {
+ cur -= matches[match_num-1].back;
+ best_mlen = matches[match_num-1].len;
+ best_off = matches[match_num-1].off;
+ last_pos = cur + 1;
+ goto _storeSequence;
+ }
+
+
+ // set prices using matches at position = cur
+ for (U32 i = 0; i < match_num; i++)
+ {
+ mlen = (i>0) ? matches[i-1].len+1 : best_mlen;
+ cur2 = cur - matches[i].back;
+ best_mlen = (cur2 + matches[i].len < ZSTD_OPT_NUM) ? matches[i].len : ZSTD_OPT_NUM - cur2;
+
+ ZSTD_LOG_PARSER("%d: Found1 cur=%d cur2=%d mlen=%d off=%d best_mlen=%d last_pos=%d\n", (int)(inr-base), cur, cur2, matches[i].len, matches[i].off, best_mlen, last_pos);
+ if (mlen < matches[i].back + 1)
+ mlen = matches[i].back + 1;
+
+ while (mlen <= best_mlen)
+ {
+ if (opt[cur2].mlen == 1)
+ {
+ litlen = opt[cur2].litlen;
+ if (cur2 > litlen)
+ price = opt[cur2 - litlen].price + ZSTD_getPrice(seqStorePtr, litlen, ip+cur2-litlen, matches[i].off, mlen - MINMATCH);
+ else
+ price = ZSTD_getPrice(seqStorePtr, litlen, anchor, matches[i].off, mlen - MINMATCH);
+ }
+ else
+ {
+ litlen = 0;
+ price = opt[cur2].price + ZSTD_getPrice(seqStorePtr, 0, NULL, matches[i].off, mlen - MINMATCH);
+ }
+
+ ZSTD_LOG_PARSER("%d: Found2 pred=%d mlen=%d best_mlen=%d off=%d price=%d litlen=%d price[%d]=%d\n", (int)(inr-base), matches[i].back, mlen, best_mlen, matches[i].off, price, litlen, cur - litlen, opt[cur - litlen].price);
+ ZSTD_LOG_TRY_PRICE("%d: TRY8 price=%d opt[%d].price=%d\n", (int)(inr-base), price, cur2 + mlen, opt[cur2 + mlen].price);
+
+ if (cur2 + mlen > last_pos || (price < opt[cur2 + mlen].price))
+ SET_PRICE(cur2 + mlen, mlen, matches[i].off, litlen, price);
+
+ mlen++;
+ }
+ }
+ } // for (skip_num = 0, cur = 1; cur <= last_pos; cur++)
+
+
+ best_mlen = opt[last_pos].mlen;
+ best_off = opt[last_pos].off;
+ cur = last_pos - best_mlen;
+ // printf("%d: start=%d best_mlen=%d best_off=%d cur=%d\n", (int)(ip - base), (int)(start - ip), (int)best_mlen, (int)best_off, cur);
+
+ /* store sequence */
+_storeSequence: // cur, last_pos, best_mlen, best_off have to be set
+ for (U32 i = 1; i <= last_pos; i++)
+ ZSTD_LOG_PARSER("%d: price[%d/%d]=%d off=%d mlen=%d litlen=%d rep=%d rep2=%d\n", (int)(ip-base+i), i, last_pos, opt[i].price, opt[i].off, opt[i].mlen, opt[i].litlen, opt[i].rep, opt[i].rep2);
+ ZSTD_LOG_PARSER("%d: cur=%d/%d best_mlen=%d best_off=%d rep=%d\n", (int)(ip-base+cur), (int)cur, (int)last_pos, (int)best_mlen, (int)best_off, opt[cur].rep);
+
+ opt[0].mlen = 1;
+ U32 offset;
+
+ while (1)
+ {
+ mlen = opt[cur].mlen;
+ ZSTD_LOG_PARSER("%d: cur=%d mlen=%d\n", (int)(ip-base), cur, mlen);
+ offset = opt[cur].off;
+ opt[cur].mlen = best_mlen;
+ opt[cur].off = best_off;
+ best_mlen = mlen;
+ best_off = offset;
+ if (mlen > cur)
+ break;
+ cur -= mlen;
+ }
+
+ for (U32 i = 0; i <= last_pos;)
+ {
+ ZSTD_LOG_PARSER("%d: price2[%d/%d]=%d off=%d mlen=%d litlen=%d rep=%d rep2=%d\n", (int)(ip-base+i), i, last_pos, opt[i].price, opt[i].off, opt[i].mlen, opt[i].litlen, opt[i].rep, opt[i].rep2);
+ i += opt[i].mlen;
+ }
+
+ cur = 0;
+
+ while (cur < last_pos)
+ {
+ ZSTD_LOG_PARSER("%d: price3[%d/%d]=%d off=%d mlen=%d litlen=%d rep=%d rep2=%d\n", (int)(ip-base+cur), cur, last_pos, opt[cur].price, opt[cur].off, opt[cur].mlen, opt[cur].litlen, opt[cur].rep, opt[cur].rep2);
+ mlen = opt[cur].mlen;
+ if (mlen == 1) { ip++; cur++; continue; }
+ offset = opt[cur].off;
+ cur += mlen;
+
+
+ U32 litLength = (U32)(ip - anchor);
+ ZSTD_LOG_ENCODE("%d/%d: ENCODE1 literals=%d mlen=%d off=%d rep1=%d rep2=%d\n", (int)(ip-base), (int)(iend-base), (int)(litLength), (int)mlen, (int)(offset), (int)rep_1, (int)rep_2);
+
+ if (offset)
+ {
+ rep_2 = rep_1;
+ rep_1 = offset;
+ }
+ else
+ {
+ if (litLength == 0)
+ {
+ best_off = rep_2;
+ rep_2 = rep_1;
+ rep_1 = best_off;
+ }
+ }
+
+ ZSTD_LOG_ENCODE("%d/%d: ENCODE2 literals=%d mlen=%d off=%d rep1=%d rep2=%d\n", (int)(ip-base), (int)(iend-base), (int)(litLength), (int)mlen, (int)(offset), (int)rep_1, (int)rep_2);
+
+#if ZSTD_OPT_DEBUG >= 5
+ int ml2;
+ if (offset)
+ ml2 = ZSTD_count(ip, ip-offset, iend);
+ else
+ ml2 = ZSTD_count(ip, ip-rep_1, iend);
+ if (ml2 < mlen && ml2 < MINMATCH) {
+ printf("%d: ERROR iend=%d mlen=%d offset=%d ml2=%d\n", (int)(ip - base), (int)(iend - ip), (int)mlen, (int)offset, (int)ml2); exit(0); }
+ if (ip < anchor) {
+ printf("%d: ERROR ip < anchor iend=%d mlen=%d offset=%d\n", (int)(ip - base), (int)(iend - ip), (int)mlen, (int)offset); exit(0); }
+ if (ip - offset < ctx->base) {
+ printf("%d: ERROR ip - offset < base iend=%d mlen=%d offset=%d\n", (int)(ip - base), (int)(iend - ip), (int)mlen, (int)offset); exit(0); }
+ if ((int)offset >= (1 << ctx->params.windowLog)) {
+ printf("%d: offset >= (1 << params.windowLog) iend=%d mlen=%d offset=%d\n", (int)(ip - base), (int)(iend - ip), (int)mlen, (int)offset); exit(0); }
+ if (mlen < MINMATCH) {
+ printf("%d: ERROR mlen < MINMATCH iend=%d mlen=%d offset=%d\n", (int)(ip - base), (int)(iend - ip), (int)mlen, (int)offset); exit(0); }
+ if (ip + mlen > iend) {
+ printf("%d: ERROR ip + mlen >= iend iend=%d mlen=%d offset=%d\n", (int)(ip - base), (int)(iend - ip), (int)mlen, (int)offset); exit(0); }
+#endif
+
+ ZSTD_updatePrice(seqStorePtr, litLength, anchor, offset, mlen-MINMATCH);
+ ZSTD_storeSeq(seqStorePtr, litLength, anchor, offset, mlen-MINMATCH);
+ anchor = ip = ip + mlen;
+ }
+
+
+ // check immediate repcode
+ while (anchor <= ilimit) {
+ const U32 repIndex = (U32)((anchor-base) - rep_2);
+ const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
+ const BYTE* const repMatch = repBase + repIndex;
+ if ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow */
+ if (MEM_read32(anchor) == MEM_read32(repMatch)) {
+ /* repcode detected we should take it */
+ const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
+ mlen = (U32)ZSTD_count_2segments(anchor+MINMATCH, repMatch+MINMATCH, iend, repEnd, prefixStart) + MINMATCH;
+ offset = rep_2; rep_2 = rep_1; rep_1 = offset; /* swap offset history */
+ ZSTD_LOG_ENCODE("%d/%d: ENCODE REP literals=%d mlen=%d off=%d rep1=%d rep2=%d\n", (int)(anchor-base), (int)(iend-base), (int)(0), (int)best_mlen, (int)(0), (int)rep_1, (int)rep_2);
+ ZSTD_updatePrice(seqStorePtr, 0, anchor, 0, mlen-MINMATCH);
+ ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, mlen-MINMATCH);
+ anchor += mlen;
+ ip = anchor;
+ continue; /* faster when present ... (?) */
+ }
+ break;
+ }
+ }
+
+ /* Last Literals */
+ {
+ U32 lastLLSize = (U32)(iend - anchor);
+ ZSTD_LOG_ENCODE("%d: lastLLSize literals=%d\n", (int)(ip-base), (int)(lastLLSize));
+ memcpy(seqStorePtr->lit, anchor, lastLLSize);
+ seqStorePtr->lit += lastLLSize;
+ }
+}
projects / thirdparty / zstd.git / commitdiff
