mirror of https://github.com/sqlite/sqlite
Change pageInsertArray() and pageFreeArray() so that they use the CellArray
object and compute cell sizes as needed, resulting in smaller and faster code. FossilOrigin-Name: f7f41818119bb7bfbd1f1297d294b32f32769cd3
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@ -1,5 +1,5 @@
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C Improvements\sto\sthe\sway\sbalance_nonroot()\sconstructs\sthe\sb.apCell\sarray\sof\npointers\sto\scells.
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D 2015-06-23T14:49:42.852
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C Change\spageInsertArray()\sand\spageFreeArray()\sso\sthat\sthey\suse\sthe\sCellArray\nobject\sand\scompute\scell\ssizes\sas\sneeded,\sresulting\sin\ssmaller\sand\sfaster\scode.
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D 2015-06-23T15:36:34.487
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F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
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F Makefile.in 1063c58075b7400d93326b0eb332b48a54f53025
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F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
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@ -192,7 +192,7 @@ F src/auth.c b56c78ebe40a2110fd361379f7e8162d23f92240
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F src/backup.c ff743689c4d6c5cb55ad42ed9d174b2b3e71f1e3
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F src/bitvec.c 5eb7958c3bf65210211cbcfc44eff86d0ded7c9d
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F src/btmutex.c 45a968cc85afed9b5e6cf55bf1f42f8d18107f79
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F src/btree.c 8d772673dc249aee6b6e65e4285291f7f2565ffd
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F src/btree.c d3299e9237047e7aaf2812f394dda4889f2e3aa9
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F src/btree.h 969adc948e89e449220ff0ff724c94bb2a52e9f1
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F src/btreeInt.h 6ece2dd9c8e2eac05f0a8ded8772a44e96486c65
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F src/build.c b3f15255d5b16e42dafeaa638fd4f8a47c94ed70
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@ -1286,7 +1286,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
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F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
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F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
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F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
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P a7be554f4b8534fc237fa4c6defc38fcd4049707
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R 4ad5f5185dfc9700d38a61349b40bf79
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P ee44bb25b2a88e25ba2afe37cf03ba199692a3a0
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R 5ed6484269ac715a433769ddc5808d8c
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U drh
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Z 77f5541f0ad6043b85ab2e262249ce69
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Z fb1540dd92109cdc5f0c16d0ac49412f
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@ -1 +1 @@
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ee44bb25b2a88e25ba2afe37cf03ba199692a3a0
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f7f41818119bb7bfbd1f1297d294b32f32769cd3
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49
src/btree.c
49
src/btree.c
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@ -6414,25 +6414,26 @@ static int pageInsertArray(
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u8 *pBegin, /* End of cell-pointer array */
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u8 **ppData, /* IN/OUT: Page content -area pointer */
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u8 *pCellptr, /* Pointer to cell-pointer area */
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int iFirst, /* Index of first cell to add */
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int nCell, /* Number of cells to add to pPg */
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u8 **apCell, /* Array of cells */
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u16 *szCell /* Array of cell sizes */
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CellArray *pCArray /* Array of cells */
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){
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int i;
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u8 *aData = pPg->aData;
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u8 *pData = *ppData;
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const int bFreelist = aData[1] || aData[2];
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int iEnd = iFirst + nCell;
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assert( CORRUPT_DB || pPg->hdrOffset==0 ); /* Never called on page 1 */
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for(i=0; i<nCell; i++){
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int sz = szCell[i];
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int rc;
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for(i=iFirst; i<iEnd; i++){
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int sz, rc;
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u8 *pSlot;
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sz = cachedCellSize(pCArray, i);
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if( bFreelist==0 || (pSlot = pageFindSlot(pPg, sz, &rc, 0))==0 ){
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pData -= sz;
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if( pData<pBegin ) return 1;
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pSlot = pData;
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}
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memcpy(pSlot, apCell[i], sz);
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memcpy(pSlot, pCArray->apCell[i], sz);
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put2byte(pCellptr, (pSlot - aData));
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pCellptr += 2;
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}
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@ -6451,22 +6452,27 @@ static int pageInsertArray(
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*/
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static int pageFreeArray(
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MemPage *pPg, /* Page to edit */
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int iFirst, /* First cell to delete */
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int nCell, /* Cells to delete */
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u8 **apCell, /* Array of cells */
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u16 *szCell /* Array of cell sizes */
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CellArray *pCArray /* Array of cells */
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){
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u8 * const aData = pPg->aData;
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u8 * const pEnd = &aData[pPg->pBt->usableSize];
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u8 * const pStart = &aData[pPg->hdrOffset + 8 + pPg->childPtrSize];
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int nRet = 0;
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int i;
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int iEnd = iFirst + nCell;
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u8 *pFree = 0;
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int szFree = 0;
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for(i=0; i<nCell; i++){
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u8 *pCell = apCell[i];
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for(i=iFirst; i<iEnd; i++){
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u8 *pCell = pCArray->apCell[i];
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if( pCell>=pStart && pCell<pEnd ){
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int sz = szCell[i];
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int sz;
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/* No need to use cachedCellSize() here. The sizes of all cells that
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** are to be freed have already been computing while deciding which
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** cells need freeing */
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sz = pCArray->szCell[i]; assert( sz>0 );
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if( pFree!=(pCell + sz) ){
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if( pFree ){
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assert( pFree>aData && (pFree - aData)<65536 );
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@ -6525,20 +6531,12 @@ static int editPage(
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/* Remove cells from the start and end of the page */
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if( iOld<iNew ){
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int nShift;
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populateCellCache(pCArray, iOld, iNew-iOld);
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nShift = pageFreeArray(
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pPg, iNew-iOld, &pCArray->apCell[iOld], &pCArray->szCell[iOld]
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);
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int nShift = pageFreeArray(pPg, iOld, iNew-iOld, pCArray);
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memmove(pPg->aCellIdx, &pPg->aCellIdx[nShift*2], nCell*2);
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nCell -= nShift;
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}
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if( iNewEnd < iOldEnd ){
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populateCellCache(pCArray, iNewEnd, iOldEnd-iNewEnd);
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nCell -= pageFreeArray(
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pPg, iOldEnd-iNewEnd,
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&pCArray->apCell[iNewEnd], &pCArray->szCell[iNewEnd]
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);
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nCell -= pageFreeArray(pPg, iNewEnd, iOldEnd - iNewEnd, pCArray);
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}
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pData = &aData[get2byteNotZero(&aData[hdr+5])];
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assert( (iOld-iNew)<nNew || nCell==0 || CORRUPT_DB );
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pCellptr = pPg->aCellIdx;
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memmove(&pCellptr[nAdd*2], pCellptr, nCell*2);
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populateCellCache(pCArray, iNew, nAdd);
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if( pageInsertArray(
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pPg, pBegin, &pData, pCellptr,
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nAdd, &pCArray->apCell[iNew], &pCArray->szCell[iNew]
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iNew, nAdd, pCArray
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) ) goto editpage_fail;
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nCell += nAdd;
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}
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pCellptr = &pPg->aCellIdx[iCell * 2];
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memmove(&pCellptr[2], pCellptr, (nCell - iCell) * 2);
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nCell++;
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(void)cachedCellSize(pCArray, iCell + iNew);
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if( pageInsertArray(
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pPg, pBegin, &pData, pCellptr,
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1, &pCArray->apCell[iCell + iNew], &pCArray->szCell[iCell + iNew]
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iCell+iNew, 1, pCArray
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) ) goto editpage_fail;
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}
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}
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/* Append cells to the end of the page */
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pCellptr = &pPg->aCellIdx[nCell*2];
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populateCellCache(pCArray, iNew+nCell, nNew-nCell);
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if( pageInsertArray(
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pPg, pBegin, &pData, pCellptr,
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nNew-nCell, &pCArray->apCell[iNew+nCell], &pCArray->szCell[iNew+nCell]
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iNew+nCell, nNew-nCell, pCArray
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) ) goto editpage_fail;
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pPg->nCell = nNew;
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