-/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: isam.h,v $
- * Revision 1.2 1994-09-14 13:10:35 quinn
- * Small changes
- *
- * Revision 1.1 1994/09/12 08:02:07 quinn
- * Not functional yet
- *
- */
+/* $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.h>
-#define IS_MAX_BLOCKTYPES 4
+#include "../isam/memory.h"
+#include "../isam/physical.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
-typedef unsigned int SYSNO; /* should be somewhere else */
-typedef unsigned int ISAM_P;
+#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)
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; /* fist free block */
+ 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;
/*
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, *ISAM;
+} isam_struct;
typedef struct ispt_struct
{
- ISAM is; /* which file do we belong to? */
- int ptr; /* current key offset */
-
+ 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_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(const char *name, int writeflag);
+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_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