361 lines
12 KiB
C
361 lines
12 KiB
C
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#ifndef h_btree
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#define h_btree
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/******************************************************************************
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*
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* Declarations for UniVerse Database btree data file routines
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*
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* Module %M% Version %I% Date %H%
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*
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* (c) Copyright 1998 Ardent Software Inc. - All Rights Reserved
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* This is unpublished proprietary source code of Ardent Software Inc.
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* The copyright notice above does not evidence any actual or intented
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* publication of such source code.
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*
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*******************************************************************************
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*
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* Maintenence log - insert most recent change descriptions at top
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* Date.... GTAR# WHO Description.........................................
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* 04/26/99 24742 GMH Correct typing
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* 04/19/99 24742 GMH Correct size of bt_lmaxrec64
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* 04/12/99 24742 GMH Implement 64bit T25 files
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* 10/14/98 23801 SAP Change copyrights.
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* 05/20/98 21718 LPC/WSM Add support for file suspension
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* 05/07/98 22910 JBG Define DBfindt25 input param
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* 03/11/96 18125 GMH Move bit declarations to disk.h
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* 03/08/96 17832 GMH Add comment
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* 01/02/96 17832 HSB new flag bitSQLITYP for SQL I type indices.
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* 11/16/95 17538 TMC Allow type 1/19 joins, remove scandir scant25 glob
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* 04/10/95 16244 GMM Changed ino_t to uv_ino_t
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* 05/24/94 8788 GMH Add mode descriptions
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* 04/22/94 8964 GMH Add ak_update structure
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* 08/02/93 10978 SHK Port to DEC AXP
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* 12/17/92 10752 RM Added bit flags for type 25 file header
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* 04/13/92 9192 GMH Added bt_lmerge value
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* 10/30/91 8874 RM btree optimizations
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* 09/09/91 8690 RM change item padding
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* 07/30/89 6060 JWT fix type 25 overflow handling
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* 03/15/89 4715 JWT Type 25 file fixes
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* 07/25/88 - - Maintenence log purged at 5.2.1, see release 5.1.10.
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*
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*****************************************************************************/
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/* modes for get_overt25 function in DBidxupd.c module */
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#define fchainCREATE 0 /* position and create new page clearing DBbuf */
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#define fchainCHECK 1 /* 0 if page on freechain exists or page created*/
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/* -1 if failure to create freechain page */
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#define fchainPLACE 2 /* position and create new page retaining DBbuf */
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#define bt_ibfact 384 /* branching factor of internal nodes */
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#define bt_lbfact 128 /* branching factor of leaf nodes */
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#define bt_asplit 32 /* asymmetric split factor for seq keys */
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#define bt_pgsiz 8192 /* page size for read/write operations */
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#define bt_intag 0x0001 /* tag bit - internal node */
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#define bt_lntag 0x0002 /* tag bit - leaf node */
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#define bt_fbtag 0x0004 /* tag bit - free node */
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#define bt_obtag 0x0008 /* tag bit - overflow node */
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#define bt_osrec 0x4000 /* index item flag for oversize record */
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#define bt_padinrec 0x2000 /* item is padded with SM */
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#define bt_newstyle 0x1000 /* item uses newstyle padding */
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/* mode parameter of DBfindt25 */
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#define bt_read 1 /* use read algorithm */
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#define bt_write 2 /* use write algorithm , lock left or write sibling */
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#define bt_delete 4 /* use write algorithm */
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#define bt_functmsk 0x0f /* function mask */
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#define bt_testrl 0x10 /* Use inputted key to test for record lock */
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/* mode parameter of DBscant25 */
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#define bt_order 0x01 /* 0 = ascending, 1 = descending */
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#define bt_usekey 0x02 /* 0 = regular leaf, 1 = use kstr */
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#define bt_bscan 0x04 /* 1 = BASIC BSCAN */
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#define bt_bscanv 0x08 /* 0 = bscan switch variable, 1 = don't */
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/* mask for keys */
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#define bt_masks ( bt_osrec | bt_padinrec | bt_newstyle )
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/* Definition of structures for INTERNAL (key) nodes */
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#define bt_imaxrec32 ( bt_pgsiz - (2 * sizeof(short) +\
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(bt_ibfact * sizeof(DBDADDR32)) + sizeof(short) +\
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(2 * (bt_ibfact * sizeof(short)))))
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#define bt_imaxrec64 ( bt_pgsiz - (2 * sizeof(short) + 4 +\
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(bt_ibfact * sizeof(DBDADDR)) + sizeof(short) +\
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(2 * (bt_ibfact * sizeof(short)))))
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#define BT_ISPACE(x) (x->addr_support!=NEW64?bt_imaxrec32:bt_imaxrec64)
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/* For OLD32 and NEW32 files */
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struct bt_inode32
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{ short tags,
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freehead;
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DBDADDR32 nptr[bt_ibfact];
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short kcnt,
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kptr[bt_ibfact],
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klen[bt_ibfact];
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char bdata[bt_imaxrec32];
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};
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/* For NEW64 only. Use padspace to insure 8-byte alignment of structure */
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struct bt_inode64
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{ short tags,
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freehead;
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char padspace[4];
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DBDADDR nptr[bt_ibfact];
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short kcnt,
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kptr[bt_ibfact],
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klen[bt_ibfact];
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char bdata[bt_imaxrec64];
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};
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union bt_inode
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{
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struct bt_inode32 is32;
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struct bt_inode64 is64;
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};
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#define INTERNAL_NODE union bt_inode
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#define INTERNAL_NODE32 struct bt_inode32
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#define INTERNAL_NODE64 struct bt_inode64
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/* Definition of structures for TERMINAL (data) nodes */
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#define bt_lmaxrec32 ( bt_pgsiz - (2 * sizeof(short) +\
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(2 * sizeof(DBDADDR32)) + sizeof(short) +\
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(2 * (bt_lbfact * sizeof(short)))))
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#define bt_lmaxrec64 ( bt_pgsiz - (2 * sizeof(short) + 4 +\
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(2 * sizeof(DBDADDR)) + sizeof(short) +\
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(2 * (bt_lbfact * sizeof(short)))))
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#define BT_LSPACE(x) (x->addr_support!=NEW64?bt_lmaxrec32:bt_lmaxrec64)
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#define bt_lsplit (1024)
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#define bt_lmerge (256)
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/* for OLD32 and NEW32 files */
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struct bt_lnode32
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{ short tags,
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freehead;
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DBDADDR32 l_sibling,
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r_sibling;
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short kcnt,
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kptr[bt_lbfact],
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klen[bt_lbfact];
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char bdata[bt_lmaxrec32];
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};
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/* NEW64 only. Use padspace to insure 8-byte alignment of structure */
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struct bt_lnode64
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{ short tags,
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freehead;
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char padspace[4];
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DBDADDR l_sibling,
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r_sibling;
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short kcnt,
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kptr[bt_lbfact],
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klen[bt_lbfact];
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char bdata[bt_lmaxrec64];
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};
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union bt_lnode
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{
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struct bt_lnode32 is32;
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struct bt_lnode64 is64;
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};
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#define TERMINAL_NODE union bt_lnode
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#define TERMINAL_NODE32 struct bt_lnode32
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#define TERMINAL_NODE64 struct bt_lnode64
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/* Definition of structures for OVERSIZED (data) nodes */
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#define bt_omaxrec32 (bt_pgsiz-(2*sizeof(short)+sizeof(DBDADDR32)+sizeof(int)))
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#define bt_omaxrec64 (bt_pgsiz-(2*sizeof(short)+sizeof(DBDADDR)+sizeof(int)))
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#define BT_OSPACE(x) (x->addr_support!=NEW64?bt_omaxrec32:bt_omaxrec64)
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struct bt_onode32
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{ short tags,fill;
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DBDADDR32 nptr;
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int bcnt;
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char bdata[bt_omaxrec32];
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};
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/* For NEW64 only. Move bcnt to insure 8-byte alignment of structure */
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struct bt_onode64
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{ short tags,fill;
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int bcnt;
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DBDADDR nptr;
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char bdata[bt_omaxrec64];
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};
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union bt_onode
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{
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struct bt_onode32 is32;
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struct bt_onode64 is64;
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};
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#define OVERSIZE_NODE union bt_onode
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#define OVERSIZE_NODE32 struct bt_onode32
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#define OVERSIZE_NODE64 struct bt_onode64
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/* Definition of structures for FREE (on freechain) nodes */
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struct bt_fnode32
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{ short tags,fill;
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DBDADDR32 nextfree;
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};
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/* For NEW64 only. Use padspace to insure 8-byte alignment of structure */
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struct bt_fnode64
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{ short tags,fill;
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char padspace[4];
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DBDADDR nextfree;
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};
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union bt_fnode
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{
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struct bt_fnode32 is32;
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struct bt_fnode64 is64;
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};
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#define FREE_NODE union bt_fnode
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#define FREE_NODE32 struct bt_fnode32
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#define FREE_NODE64 struct bt_fnode64
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/* Definition of header structures for BDATA records */
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struct bt_index
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{
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short slotptr;
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char data[1];
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};
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#define BT_INDEX struct bt_index
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#define T25ovhdr32 (sizeof(short)+sizeof(DBDADDR32))
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#define T25ovhdr64 (sizeof(short)+sizeof(DBDADDR))
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/* Structure used within trans.c and DBidxupd.c to allow for the
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reference of current record without having a lock conflict.
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Use of TRANS, Tfile or XLATE to main data file same record
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id will no longer wait on write lock. Read and Readu will
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still wait.
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*/
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struct ak_update
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{ int refs;
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uv_ino_t inode;
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uUVLONG dev;
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STRING *key;
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STRING *data;
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};
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/* function prototyping */
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EXTERN DBDADDR get_t25info(
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DBFILE *fdesc,
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INTERNAL_NODE *nodeptr,
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int element,
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int cell,
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DBDADDR *value);
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EXTERN int set_t25info(
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DBFILE *fdesc,
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INTERNAL_NODE *nodeptr,
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int element,
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int cell,
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DBDADDR value);
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EXTERN char *get_t25bdata(
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DBFILE *fdesc,
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INTERNAL_NODE *inodeptr);
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/* Used as 'element' argument to get_t25info & set_t25info function */
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#define BT_FREE 1 /* 2 byte value defining new bdata insert location */
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#define BT_PREV 2 /* DBDADDR address of previous node (LNODE l_sibling) */
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#define BT_NEXT 3 /* DBDADDR address of successive node (LNODE r_sibling)*/
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#define BT_NODE 4 /* table of DBDADDR address to other nodes (INODE nptr table) */
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#define BT_KCNT 5 /* 2 byte counter of kptr entries (INODE & LNODE tables) */
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#define BT_KPTR 6 /* table of 2 byte offsets into bdata (INODE & LNODE tables) */
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#define BT_KLEN 7 /* table of 2 byte bdata lengths (INODE & LNODE tables) */
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#define BT_BCNT 8 /* 4 byte counter of used bytes (ONODE only) */
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/* macro to retrieve Bdata pointer */
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#define GET_T25BDATA(fdesc, nodeptr) get_t25bdata(fdesc, (INTERNAL_NODE*)nodeptr)
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/* retrieval function macro calls */
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#define GET_T25FREE(fdesc, nodeptr, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_FREE, 0, value)
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#define GET_T25PREV(fdesc, nodeptr, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_PREV, (int)0, (DBDADDR)value)
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#define GET_T25NEXT(fdesc, nodeptr, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_NEXT, (int)0, (DBDADDR)value)
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#define GET_T25NODE(fdesc, nodeptr, cell, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_NODE, (int)cell, (DBDADDR)value)
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#define GET_T25KCNT(fdesc, nodeptr, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KCNT, (int)0, (DBDADDR)value)
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#define GET_T25KPTR(fdesc, nodeptr, cell, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KPTR, (int)cell, (DBDADDR)value)
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#define GET_T25KLEN(fdesc, nodeptr, cell, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KLEN, (int)cell, (DBDADDR)value)
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#define GET_T25BCNT(fdesc, nodeptr, value)\
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get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_BCNT, (int)0, (DBDADDR)value)
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/* set function macro calls */
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#define SET_T25FREE(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_FREE, (int)0, (DBDADDR)value)
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#define SET_T25PREV(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_PREV, (int)0, (DBDADDR)value)
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#define SET_T25NEXT(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_NEXT, (int)0, (DBDADDR)value)
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#define SET_T25NODE(fdesc, nodeptr, cell, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_NODE, (int)cell, (DBDADDR)value)
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#define SET_T25KCNT(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KCNT, (int)0, (DBDADDR)value)
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#define SET_T25KPTR(fdesc, nodeptr, cell, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KPTR, (int)cell, (DBDADDR)value)
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#define SET_T25KLEN(fdesc, nodeptr, cell, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KLEN, (int)cell, (DBDADDR)value)
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#define SET_T25BCNT(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_BCNT, (int)0, (DBDADDR)value)
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#define INC_T25KCNT(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KCNT, (int)0, \
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(DBDADDR)((int)get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KCNT, (int)0, (DBDADDR)NULL) +\
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(int)value))
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#define DEC_T25KCNT(fdesc, nodeptr, value)\
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set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KCNT, (int)0, \
|
||
|
|
(DBDADDR)((int)get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_KCNT, (int)0, (DBDADDR)NULL) -\
|
||
|
|
(int)value))
|
||
|
|
|
||
|
|
#define INC_T25FREE(fdesc, nodeptr, value)\
|
||
|
|
set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_FREE, (int)0, \
|
||
|
|
(DBDADDR)((int)get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_FREE, 0, (DBDADDR)NULL) +\
|
||
|
|
(int)value))
|
||
|
|
|
||
|
|
#define DEC_T25FREE(fdesc, nodeptr, value)\
|
||
|
|
set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_FREE, (int)0, \
|
||
|
|
(DBDADDR)((int)get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_FREE, 0, (DBDADDR)NULL) -\
|
||
|
|
(int)value))
|
||
|
|
|
||
|
|
#define INC_T25BCNT(fdesc, nodeptr, value)\
|
||
|
|
set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_BCNT, (int)0, \
|
||
|
|
(DBDADDR)((int)get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_BCNT, 0, (DBDADDR)NULL) +\
|
||
|
|
(int)value))
|
||
|
|
|
||
|
|
#define DEC_T25BCNT(fdesc, nodeptr, value)\
|
||
|
|
set_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_BCNT, (int)0, \
|
||
|
|
(DBDADDR)((int)get_t25info(fdesc, (INTERNAL_NODE*)nodeptr, BT_BCNT, 0, (DBDADDR)NULL) -\
|
||
|
|
(int)value))
|
||
|
|
#endif /* end of btree.h */
|