X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=isamc%2Fisamd-p.h;h=84f8b82795feb2d986d4ece95bb2c19276197ad1;hb=2b33b395b50c562323ea2b0251f9b798cf5241d2;hp=81d1530f7707aab4128afc7a38728e3ed279e4e7;hpb=e8f4cf34c75ffdc7bbfaf3fa232f29cc1384b60c;p=idzebra-moved-to-github.git

diff --git a/isamc/isamd-p.h b/isamc/isamd-p.h
index 81d1530..84f8b82 100644
--- a/isamc/isamd-p.h
+++ b/isamc/isamd-p.h
@@ -1,9 +1,9 @@
-/*
+/* $Id: isamd-p.h,v 1.9 1999-10-05 09:57:40 heikki Exp $
  * Copyright (c) 1995-1996, Index Data.
  * See the file LICENSE for details.
  * Heikki Levanto
  *
- *
+ * log at the end
  */
 
 #include <bfile.h>
@@ -25,21 +25,24 @@ typedef struct ISAMD_file_s {
     BFile bf;
     int head_is_dirty;
     
-    int no_writes;
+    int no_writes;  /* statistics, to be used properly... */
     int no_reads;
     int no_skip_writes;
     int no_allocated;
     int no_released;
     int no_remap;
 
-    int no_forward;
+    int no_forward;  /* stats from pp_read, for isam-c compatibility */
     int no_backward;
     int sum_forward;
     int sum_backward;
     int no_next;
     int no_prev;
 
-    char *alloc_buf;
+    int no_op_diffonly;/* number of opens without mainblock */
+    int no_op_main;    /* number of opens with a main block */
+
+    char *alloc_buf;    /* free-list handling (?) */
     int alloc_entries_num;
     int alloc_entries_max;
 
@@ -50,25 +53,47 @@ typedef struct ISAMD_file_s {
 struct ISAMD_s {
     int no_files;
     int max_cat;
-  //  char *merge_buf;
-    char *startblock; /* start of the chain, update lastptr and numKeys here */
-    char *lastblock;  /* end of the chain, append here */
     ISAMD_M method;
     ISAMD_file files;
+    int last_pos;   /* last read/write position for seek stats */
+    int last_cat;   /* same for category */
+    int no_read;    /* blocks read (in all categories) */
+    int no_write;   /* blocks written (in all categories) */
+    int no_op_single;/* singleton "blocks" opened */
+    int no_read_keys;/* number of keys read (occurences of words) */
+    int no_read_main;/* number of main keys read (not diffs) */
+    int no_read_eof; /* number of key sequence ends read (no of words read) */
+    int no_seek_nxt; /* seeks to the next record (fast) */
+    int no_seek_sam; /* seeks to same record (fast) */
+    int no_seek_fwd; /* seeks forward */
+    int no_seek_prv; /* seeks to previous */
+    int no_seek_bak; /* seeks backwards */
+    int no_seek_cat; /* seeks to different category (expensive) */
+    int no_op_new;  /* "open"s for new blocks */
+    int no_fbuilds;    /* number of first-time builds */
+    int no_appds;      /* number of appends */
+    int no_merges;     /* number of merges done */
+    int no_non;     /* merges without any work */
+    int no_singles; /* new items resulting in singletons */
 }; 
 
+
+typedef struct ISAMD_DIFF_s *ISAMD_DIFF;
+
 struct ISAMD_PP_s {
-    char *buf;
-    ISAMD_BLOCK_SIZE offset;
-    ISAMD_BLOCK_SIZE size;
+    char *buf;   /* buffer for read/write operations */
+    ISAMD_BLOCK_SIZE offset; /* position for next read/write */
+    ISAMD_BLOCK_SIZE size;   /* size of actual data */
     int cat;  /* category of this block */
     int pos;  /* block number of this block */
     int next; /* number of the next block */
+    int diffs; /* not used in the modern isam-d, but kept for stats compatibility */
+               /* never stored on disk, though */
     ISAMD is;
-    void *decodeClientData;
-    int deleteFlag;
+    void *decodeClientData;  /* delta-encoder's own data */
+    ISAMD_DIFF diffinfo;
+    char *diffbuf; /* buffer for the diff block */
     int numKeys;
-    ISAMD_BLOCK_SIZE lastblock;  /* last block in chain */
 };
 
 #define ISAMD_BLOCK_OFFSET_N (sizeof(int) +  \
@@ -76,13 +101,21 @@ struct ISAMD_PP_s {
 /* == 8 */
 #define ISAMD_BLOCK_OFFSET_1 (sizeof(int) + \
                               sizeof(ISAMD_BLOCK_SIZE) + \
-                              sizeof(int) + \
                               sizeof(ISAMD_BLOCK_SIZE)) 
-/* == 16 */
+/* == 12  (was 16) */
+//                              sizeof(int) + 
+
+
 int isamd_alloc_block (ISAMD is, int cat);
 void isamd_release_block (ISAMD is, int cat, int pos);
 int isamd_read_block (ISAMD is, int cat, int pos, char *dst);
 int isamd_write_block (ISAMD is, int cat, int pos, char *src);
+void isamd_free_diffs(ISAMD_PP pp);
+
+int is_singleton(ISAMD_P ipos);
+void singleton_decode (int code, struct it_key *k);
+int singleton_encode(struct it_key *k);
+
 
 #ifdef __cplusplus
 }
@@ -92,8 +125,27 @@ int isamd_write_block (ISAMD is, int cat, int pos, char *src);
 
 /*
  * $Log: isamd-p.h,v $
- * Revision 1.2  1999-07-14 13:21:34  heikki
- * Added isam-d files. Compiles (almost) clean. Doesn't work at all
+ * Revision 1.9  1999-10-05 09:57:40  heikki
+ * Tuning the isam-d (and fixed a small "detail")
+ *
+ * Revision 1.8  1999/09/23 18:01:18  heikki
+ * singleton optimising
+ *
+ * Revision 1.7  1999/09/20 15:48:06  heikki
+ * Small changes
+ *
+ * Revision 1.6  1999/08/25 18:09:23  heikki
+ * Starting to optimize
+ *
+ * Revision 1.5  1999/08/20 12:25:58  heikki
+ * Statistics in isamd
+ *
+ * Revision 1.4  1999/07/21 14:24:50  heikki
+ * isamd write and read functions ok, except when diff block full.
+ * (merge not yet done)
+ *
+ * Revision 1.3  1999/07/14 15:05:30  heikki
+ * slow start on isam-d
  *
  * Revision 1.1  1999/07/14 12:34:43  heikki
  * Copied from isamh, starting to change things...