+++ /dev/null
-/* $Id: isam.h,v 1.15 2002-08-02 19:26:55 adam Exp $
- Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
- Index Data Aps
-
-This file is part of the Zebra server.
-
-Zebra 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, or (at your option) any later
-version.
-
-Zebra 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 Zebra; see the file LICENSE.zebra. If not, write to the
-Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
-*/
-
-
-
-#ifndef ISAM_H
-#define ISAM_H
-
-#include <res.h>
-#include <bfile.h>
-
-#include "../isam/memory.h"
-#include "../isam/physical.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define IS_MAX_BLOCKTYPES 4
-#define IS_MAX_RECORD 512
-#define IS_DEF_REPACK_PERCENT "30" /* how much relative change before repack */
-
-/*
- * Description of a blocktype (part of an isam file)
- */
-typedef struct isam_blocktype
-{
- BFile bf; /* blocked file */
- int blocksize;
- int first_block; /* position of first data block */
- int max_keys_block; /* max num of keys per block */
- int max_keys_block0; /* max num of keys in first block */
- int nice_keys_block; /* nice number of keys per block */
- int max_keys; /* max number of keys per table */
- int freelist; /* first free block */
- int top; /* first unused block */
- int index; /* placeholder. Always 0. */
- char *dbuf; /* buffer for use in I/O operations */
-} isam_blocktype;
-
-/*
- * Handle to an open isam complex.
- */
-typedef struct isam_struct
-{
- isam_blocktype types[IS_MAX_BLOCKTYPES]; /* block_types used in this file */
- int num_types; /* number of block types used */
- int writeflag;
- int keysize; /* size of the keys (records) used */
- int repack; /* how many percent to grow before repack */
- int (*cmp)(const void *k1, const void *k2); /* compare function */
-} isam_struct;
-
-typedef struct ispt_struct
-{
- struct is_mtable tab;
- struct ispt_struct *next; /* freelist */
-} ispt_struct, *ISPT;
-
-#define is_type(x) ((x) & 3) /* type part of position */
-#define is_block(x) ((x) >> 2) /* block # part of position */
-
-#define is_keysize(is) ((is)->keysize)
-
-/*
- * Public Prototypes.
- *******************************************************************
- */
-
-/*
- * Open isam file.
- */
-ISAM is_open(BFiles bfs, const char *name,
- int (*cmp)(const void *p1, const void *p2),
- int writeflag, int keysize, Res res);
-
-/*
- * Close isam file.
- */
-int is_close(ISAM is);
-
-/*
- * Locate a table of keys in an isam file. The ISPT is an individual
- * position marker for that table.
- */
-ISPT is_position(ISAM is, ISAM_P pos);
-
-/*
- * Release ISPT.
- */
-void is_pt_free(ISPT ip);
-
-/*
- * Read a key from a table.
- */
-int is_readkey(ISPT ip, void *buf);
-
-int is_writekey(ISPT ip, const void *buf);
-
-int is_numkeys(ISPT ip);
-
-void is_rewind(ISPT ip);
-
-ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif