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Simplifications to btree.c to help facilitate coverage testing. (CVS 6884)

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FossilOrigin-Name: dfb146ef003bae8ff216baf68cc43d7eb7855c68
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drh
2009-07-12 02:32:21 +00:00
parent 6a8b8d3cc8
commit 3bcdfd25bd
3 changed files with 14 additions and 14 deletions
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14
src/btree.c
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.681 2009/07/11 18:26:29 drh Exp $
** $Id: btree.c,v 1.682 2009/07/12 02:32:22 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
@@ -3606,10 +3606,8 @@ static int copyPayload(
** A total of "amt" bytes are read or written beginning at "offset".
** Data is read to or from the buffer pBuf.
**
** This routine does not make a distinction between key and data.
** It just reads or writes bytes from the payload area. Data might
** appear on the main page or be scattered out on multiple overflow
** pages.
** The content being read or written might appear on the main page
** or be scattered out on multiple overflow pages.
**
** If the BtCursor.isIncrblobHandle flag is set, and the current
** cursor entry uses one or more overflow pages, this function
@@ -3649,7 +3647,7 @@ static int accessPayload(
aPayload = pCur->info.pCell + pCur->info.nHeader;
nKey = (pPage->intKey ? 0 : (int)pCur->info.nKey);
if( offset+amt > nKey+pCur->info.nData
if( NEVER(offset+amt > nKey+pCur->info.nData)
|| &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize]
){
/* Trying to read or write past the end of the data is an error */
@@ -3687,7 +3685,9 @@ static int accessPayload(
if( pCur->isIncrblobHandle && !pCur->aOverflow ){
int nOvfl = (pCur->info.nPayload-pCur->info.nLocal+ovflSize-1)/ovflSize;
pCur->aOverflow = (Pgno *)sqlite3MallocZero(sizeof(Pgno)*nOvfl);
if( nOvfl && !pCur->aOverflow ){
/* nOvfl is always positive. If it were zero, fetchPayload would have
** been used instead of this routine. */
if( ALWAYS(nOvfl) && !pCur->aOverflow ){
rc = SQLITE_NOMEM;
}
}