diff options
Diffstat (limited to 'src/btree.c')
| -rw-r--r-- | src/btree.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/btree.c b/src/btree.c index cbf93d222..c02f070e0 100644 --- a/src/btree.c +++ b/src/btree.c @@ -3278,8 +3278,8 @@ int sqlite3BtreeSavepoint(Btree *p, int op, int iSavepoint){ ** root page of a b-tree. If it is not, then the cursor acquired ** will not work correctly. ** -** It is assumed that the sqlite3BtreeCursorSize() bytes of memory -** pointed to by pCur have been zeroed by the caller. +** It is assumed that the sqlite3BtreeCursorZero() has been called +** on pCur to initialize the memory space prior to invoking this routine. */ static int btreeCursor( Btree *p, /* The btree */ @@ -3356,6 +3356,18 @@ int sqlite3BtreeCursorSize(void){ } /* +** Initialize memory that will be converted into a BtCursor object. +** +** The simple approach here would be to memset() the entire object +** to zero. But it turns out that the apPage[] and aiIdx[] arrays +** do not need to be zeroed and they are large, so we can save a lot +** of run-time by skipping the initialization of those elements. +*/ +void sqlite3BtreeCursorZero(BtCursor *p){ + memset(p, 0, offsetof(BtCursor, iPage)); +} + +/* ** Set the cached rowid value of every cursor in the same database file ** as pCur and having the same root page number as pCur. The value is ** set to iRowid. |