/*
- * Copyright (C) 1994, Index Data I/S
+ * Copyright (C) 1994-1999, Index Data
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: isam.h,v $
- * Revision 1.1 1994-09-12 08:02:07 quinn
+ * Revision 1.14 1999-02-02 14:50:34 adam
+ * Updated WIN32 code specific sections. Changed header.
+ *
+ * Revision 1.13 1997/09/17 12:19:09 adam
+ * Zebra version corresponds to YAZ version 1.4.
+ * Changed Zebra server so that it doesn't depend on global common_resource.
+ *
+ * Revision 1.12 1997/09/05 15:30:00 adam
+ * Changed prototype for chr_map_input - added const.
+ * Added support for C++, headers uses extern "C" for public definitions.
+ *
+ * Revision 1.11 1996/10/29 13:43:44 adam
+ * Removed definition of SYSNO.
+ *
+ * Revision 1.10 1995/09/06 16:10:57 adam
+ * More work on boolean sets.
+ *
+ * Revision 1.9 1994/09/28 16:58:26 quinn
+ * Small mod.
+ *
+ * Revision 1.8 1994/09/28 12:56:09 quinn
+ * Added access functions (ISPT)
+ *
+ * Revision 1.7 1994/09/28 11:56:13 quinn
+ * Removed const from input to is_merge
+ *
+ * Revision 1.6 1994/09/28 11:29:28 quinn
+ * Added cmp parameter.
+ *
+ * Revision 1.5 1994/09/27 20:03:36 quinn
+ * Seems relatively bug-free.
+ *
+ * Revision 1.4 1994/09/26 17:05:54 quinn
+ * Trivial.
+ *
+ * Revision 1.3 1994/09/26 16:08:42 quinn
+ * Most of the functionality in place.
+ *
+ * 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
*
*/
#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)
{
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;
/*
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