Minor.

[idzebra-moved-to-github.git] / include / isam.h

diff --git a/include/isam.h b/include/isam.h
index 126270e..9ecc319 100644 (file)
--- a/include/isam.h
+++ b/include/isam.h
@@ -1,10 +1,51 @@
 /*
- * 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
  *
  */
@@ -12,13 +53,19 @@
 #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)
@@ -27,9 +74,15 @@ 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;
 
 /*
@@ -41,19 +94,20 @@ typedef struct isam_struct
     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.
@@ -63,7 +117,9 @@ typedef struct ispt_struct
 /*
  * 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.
@@ -86,4 +142,16 @@ void is_pt_free(ISPT ip);
  */
 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