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Begin adding BTree code (CVS 213)

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FossilOrigin-Name: bdb1c425f577d455155982ee2cd8cb686bcaf0da
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drh
2001-04-17 20:09:11 +00:00
parent 547085fc62
commit a059ad070b
5 changed files with 356 additions and 9 deletions
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src/btree.h Normal file
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/*
** Copyright (c) 2001 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public
** License as published by the Free Software Foundation; either
** version 2 of the License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
**
** You should have received a copy of the GNU General Public
** License along with this library; if not, write to the
** Free Software Foundation, Inc., 59 Temple Place - Suite 330,
** Boston, MA 02111-1307, USA.
**
** Author contact information:
** drh@hwaci.com
** http://www.hwaci.com/drh/
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.
**
** @(#) $Id: btree.h,v 1.1 2001/04/17 20:09:11 drh Exp $
*/
typedef struct Btree Btree;
typedef struct BtCursor BtCursor;
int sqliteBtreeOpen(const char *zFilename, int mode, Btree **ppBtree);
int sqliteBtreeClose(Btree*);
int sqliteBtreeBeginTrans(Btree*);
int sqliteBtreeCommit(Btree*);
int sqliteBtreeRollback(Btree*);
int sqliteBtreeCursor(Btree*, BtCursor **ppCur);
/* Move the cursor so that it points to an entry near pKey.
** Return 0 if the cursor is left pointing exactly at pKey.
** Return -1 if the cursor points to the largest entry less than pKey.
** Return 1 if the cursor points to the smallest entry greater than pKey.
*/
int sqliteBtreeMoveto(BtCursor*, void *pKey, int nKey);
int sqliteBtreeDelete(BtCursor*);
int sqliteBtreeInsert(BtCursor*, void *pKey, int nKey, void *pData, int nData);
int sqliteBtreeNext(BtCursor*);
int sqliteBtreeKeySize(BtCursor*);
int sqliteBtreeKey(BtCursor*, int offset, int amt, char *zBuf);
int sqliteBtreeDataSize(BtCursor*);
int sqliteBtreeData(BtCursor*, int offset, int amt, char *zBuf);
int sqliteBtreeCloseCursor(BtCursor*);