-/*
- * Copyright (c) 1996-1998, Index Data.
- * See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: merge.c,v $
- * Revision 1.8 1998-03-18 09:23:55 adam
- * Blocks are stored in chunks on free list - up to factor 2 in speed.
- * Fixed bug that could occur in block category rearrangemen.
- *
- * Revision 1.7 1998/03/11 11:18:18 adam
- * Changed the isc_merge to take into account the mfill (minimum-fill).
- *
- * Revision 1.6 1998/03/06 13:54:03 adam
- * Fixed two nasty bugs in isc_merge.
- *
- * Revision 1.5 1997/02/12 20:42:43 adam
- * Bug fix: during isc_merge operations, some pages weren't marked dirty
- * even though they should be. At this point the merge operation marks
- * a page dirty if the previous page changed at all. A better approach is
- * to mark it dirty if the last key written changed in previous page.
- *
- * Revision 1.4 1996/11/08 11:15:31 adam
- * Number of keys in chain are stored in first block and the function
- * to retrieve this information, isc_pp_num is implemented.
- *
- * Revision 1.3 1996/11/04 14:08:59 adam
- * Optimized free block usage.
- *
- * Revision 1.2 1996/11/01 13:36:46 adam
- * New element, max_blocks_mem, that control how many blocks of max size
- * to store in memory during isc_merge.
- * Function isc_merge now ignores delete/update of identical keys and
- * the proper blocks are then non-dirty and not written in flush_blocks.
- *
- * Revision 1.1 1996/11/01 08:59:15 adam
- * First version of isc_merge that supports update/delete.
- *
- */
+/* $Id: merge.c,v 1.29 2005-01-15 19:38:31 adam Exp $
+ Copyright (C) 1995-2005
+ 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.
+*/
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
-
-#include <log.h>
+#include <yaz/log.h>
#include "isamc-p.h"
struct isc_merge_block {
int offset; /* offset in r_buf */
- int block; /* block number of file (0 if none) */
+ zint block; /* block number of file (0 if none) */
int dirty; /* block is different from that on file */
};
-static void opt_blocks (ISAMC is, struct isc_merge_block *mb, int ptr)
+#if 0
+static void opt_blocks (ISAMC is, struct isc_merge_block *mb, int ptr,
+ int last)
{
int i, no_dirty = 0;
for (i = 0; i<ptr; i++)
if (mb[i].dirty)
no_dirty++;
- if (no_dirty*3 < ptr*2)
+ if (no_dirty*4 < ptr*3)
return;
/* bubble-sort it */
for (i = 0; i<ptr; i++)
mb[i].block = tmp;
mb[i].dirty = 1;
}
+ if (!last)
+ mb[i].dirty = 1;
}
+#endif
static void flush_blocks (ISAMC is, struct isc_merge_block *mb, int ptr,
- char *r_buf, int *firstpos, int cat, int last,
- int *numkeys)
+ char *r_buf, zint *firstpos, int cat, int last,
+ zint *numkeys)
{
int i;
mb[i].dirty = 1;
}
}
- opt_blocks (is, mb, ptr);
+
for (i = 0; i<ptr; i++)
{
char *src;
if (!*firstpos)
*firstpos = mb[i].block;
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: skip ptr=%d size=%d %d %d",
+ yaz_log (YLOG_LOG, "isc: skip ptr=%d size=%d %d " ZINT_FORMAT,
i, ssize, cat, mb[i].block);
++(is->files[cat].no_skip_writes);
continue;
src = r_buf + mb[i].offset - ISAMC_BLOCK_OFFSET_1;
ssize += ISAMC_BLOCK_OFFSET_1;
- memcpy (src+sizeof(int)+sizeof(ssize), numkeys,
- sizeof(*numkeys));
+ memcpy (src+sizeof(zint)+sizeof(ssize), numkeys, sizeof(*numkeys));
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: flush ptr=%d numk=%d size=%d nextpos=%d",
- i, *numkeys, (int) ssize, mb[i+1].block);
+ yaz_log (YLOG_LOG, "isc: flush ptr=%d numk=" ZINT_FORMAT " size=%d nextpos="
+ ZINT_FORMAT, i, *numkeys, (int) ssize, mb[i+1].block);
}
else
{
src = r_buf + mb[i].offset - ISAMC_BLOCK_OFFSET_N;
ssize += ISAMC_BLOCK_OFFSET_N;
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: flush ptr=%d size=%d nextpos=%d",
+ yaz_log (YLOG_LOG, "isc: flush ptr=%d size=%d nextpos=" ZINT_FORMAT,
i, (int) ssize, mb[i+1].block);
}
- memcpy (src, &mb[i+1].block, sizeof(int));
- memcpy (src+sizeof(int), &ssize, sizeof(ssize));
+ memcpy (src, &mb[i+1].block, sizeof(zint));
+ memcpy (src+sizeof(zint), &ssize, sizeof(ssize));
isc_write_block (is, cat, mb[i].block, src);
}
}
-static int get_border (ISAMC is, struct isc_merge_block *mb, int ptr,
- int cat, int firstpos)
+static int get_border (ISAMC is, struct isc_merge_block *mb, zint ptr,
+ int cat, zint firstpos)
{
/* Border set to initial fill or block size depending on
whether we are creating a new one or updating and old one.
return mb[ptr].offset + fill - off;
}
-ISAMC_P isc_merge (ISAMC is, ISAMC_P ipos, ISAMC_I data)
+ISAMC_P isc_merge (ISAMC is, ISAMC_P ipos, ISAMC_I *data)
{
char i_item[128], *i_item_ptr;
ISAMC_PP pp;
char f_item[128], *f_item_ptr;
int f_more;
+ int last_dirty = 0;
+ int debug = is->method->debug;
struct isc_merge_block mb[200];
- int firstpos = 0;
+ zint firstpos = 0;
int cat = 0;
char r_item_buf[128]; /* temporary result output */
char *r_buf; /* block with resulting data */
int r_offset = 0; /* current offset in r_buf */
int ptr = 0; /* pointer */
void *r_clientData; /* encode client data */
- int border;
- int numKeys = 0;
+ zint border;
+ zint numKeys = 0;
- r_clientData = (*is->method->code_start)(ISAMC_ENCODE);
+ r_clientData = (*is->method->codec.start)();
r_buf = is->merge_buf + 128;
pp = isc_pp_open (is, ipos);
f_more = 1;
cat = pp->cat;
- if (is->method->debug > 1)
- logf (LOG_LOG, "isc: isc_merge begin %d %d", cat, pp->pos);
+ if (debug > 1)
+ yaz_log (YLOG_LOG, "isc: isc_merge begin %d " ZINT_FORMAT, cat, pp->pos);
/* read first item from i */
i_item_ptr = i_item;
/* the resulting output block is too small/empty. Delete
the original (if any)
*/
- if (is->method->debug > 3)
- logf (LOG_LOG, "isc: release A");
+ if (debug > 3)
+ yaz_log (YLOG_LOG, "isc: release A");
if (mb[ptr].block)
isc_release_block (is, pp->cat, mb[ptr].block);
mb[ptr].block = pp->pos;
- mb[ptr].dirty = 1;
+ if (!mb[ptr].dirty)
+ mb[ptr].dirty = 1;
if (ptr > 0)
mb[ptr-1].dirty = 1;
}
{
/* indicate new boundary based on the original file */
mb[++ptr].block = pp->pos;
- mb[ptr].dirty = (mb[ptr-1].dirty > 1) ? 1 : 0;
+ mb[ptr].dirty = last_dirty;
mb[ptr].offset = r_offset;
- if (is->method->debug > 3)
- logf (LOG_LOG, "isc: bound ptr=%d,offset=%d",
+ if (debug > 3)
+ yaz_log (YLOG_LOG, "isc: bound ptr=%d,offset=%d",
ptr, r_offset);
if (cat==is->max_cat && ptr >= is->method->max_blocks_mem)
{
/* We are dealing with block(s) of max size. Block(s)
except 1 will be flushed.
*/
- if (is->method->debug > 2)
- logf (LOG_LOG, "isc: flush A %d sections", ptr);
+ if (debug > 2)
+ yaz_log (YLOG_LOG, "isc: flush A %d sections", ptr);
flush_blocks (is, mb, ptr-1, r_buf, &firstpos, cat,
0, &pp->numKeys);
mb[0].block = mb[ptr-1].block;
}
border = get_border (is, mb, ptr, cat, firstpos);
}
+ last_dirty = 0;
if (!f_more)
cmp = -1;
else if (!i_more)
{
/* no! delete the item */
r_item = NULL;
+ last_dirty = 1;
mb[ptr].dirty = 2;
}
}
{
if (!i_mode) /* delete item which isn't there? */
{
- logf (LOG_FATAL, "Inconsistent register at offset %d",
+ yaz_log (YLOG_FATAL, "Inconsistent register at offset %d",
r_offset);
abort ();
}
memcpy (r_item, i_item, i_item_ptr - i_item);
mb[ptr].dirty = 2;
+ last_dirty = 1;
/* move i */
i_item_ptr = i_item;
i_more = (*data->read_item)(data->clientData, &i_item_ptr,
if (r_item) /* insert resulting item? */
{
char *r_out_ptr = r_buf + r_offset;
+ const char *src = r_item;
int new_offset;
- (*is->method->code_item)(ISAMC_ENCODE, r_clientData,
- &r_out_ptr, &r_item);
+ (*is->method->codec.encode)(r_clientData, &r_out_ptr, &src);
new_offset = r_out_ptr - r_buf;
numKeys++;
if (border < new_offset && border >= r_offset)
{
- if (is->method->debug > 2)
- logf (LOG_LOG, "isc: border %d %d", ptr, border);
+ if (debug > 2)
+ yaz_log (YLOG_LOG, "isc: border %d " ZINT_FORMAT,
+ ptr, border);
/* Max size of current block category reached ...
make new virtual block entry */
mb[++ptr].block = 0;
except one will be flushed. Note: the block(s) are
surely not the last one(s).
*/
- if (is->method->debug > 2)
- logf (LOG_LOG, "isc: flush B %d sections", ptr-1);
+ if (debug > 2)
+ yaz_log (YLOG_LOG, "isc: flush B %d sections", ptr-1);
flush_blocks (is, mb, ptr-1, r_buf, &firstpos, cat,
0, &pp->numKeys);
mb[0].block = mb[ptr-1].block;
{
int border = is->method->filecat[cat].ifill -
ISAMC_BLOCK_OFFSET_1 + mb[j].offset;
- if (is->method->debug > 3)
- logf (LOG_LOG, "isc: remap %d border=%d", i, border);
+ if (debug > 3)
+ yaz_log (YLOG_LOG, "isc: remap %d border=%d", i, border);
if (mb[i+1].offset > border && mb[i].offset <= border)
{
- if (is->method->debug > 3)
- logf (LOG_LOG, "isc: to %d %d", j, mb[i].offset);
+ if (debug > 3)
+ yaz_log (YLOG_LOG, "isc: to %d %d", j, mb[i].offset);
mb[++j].dirty = 1;
mb[j].block = 0;
mb[j].offset = mb[i].offset;
}
}
- if (is->method->debug > 2)
- logf (LOG_LOG, "isc: remap from %d to %d sections to cat %d",
+ if (debug > 2)
+ yaz_log (YLOG_LOG, "isc: remap from %d to %d sections to cat %d",
ptr, j, cat);
ptr = j;
border = get_border (is, mb, ptr, cat, firstpos);
- if (is->method->debug > 3)
- logf (LOG_LOG, "isc: border=%d r_offset=%d", border, r_offset);
+ if (debug > 3)
+ yaz_log (YLOG_LOG, "isc: border=" ZINT_FORMAT " r_offset=%d",
+ border, r_offset);
}
}
if (mb[ptr].offset < r_offset)
{ /* empty output. Release last block if any */
if (cat == pp->cat && mb[ptr].block)
{
- if (is->method->debug > 3)
- logf (LOG_LOG, "isc: release C");
+ if (debug > 3)
+ yaz_log (YLOG_LOG, "isc: release C");
isc_release_block (is, pp->cat, mb[ptr].block);
mb[ptr].block = 0;
if (ptr > 0)
}
}
- if (is->method->debug > 2)
- logf (LOG_LOG, "isc: flush C, %d sections", ptr);
+ if (debug > 2)
+ yaz_log (YLOG_LOG, "isc: flush C, %d sections", ptr);
if (firstpos)
{
has changed */
if (numKeys != isc_pp_num (pp))
{
- if (is->method->debug > 2)
- logf (LOG_LOG, "isc: patch num keys firstpos=%d num=%d",
+ if (debug > 2)
+ yaz_log (YLOG_LOG, "isc: patch num keys firstpos=" ZINT_FORMAT " num=" ZINT_FORMAT,
firstpos, numKeys);
bf_write (is->files[cat].bf, firstpos, ISAMC_BLOCK_OFFSET_N,
sizeof(numKeys), &numKeys);
/* flush rest of block(s) in r_buf */
flush_blocks (is, mb, ptr, r_buf, &firstpos, cat, 1, &numKeys);
- (*is->method->code_stop)(ISAMC_ENCODE, r_clientData);
+ (*is->method->codec.stop)(r_clientData);
if (!firstpos)
cat = 0;
- if (is->method->debug > 1)
- logf (LOG_LOG, "isc: isc_merge return %d %d", cat, firstpos);
+ if (debug > 1)
+ yaz_log (YLOG_LOG, "isc: isc_merge return %d " ZINT_FORMAT, cat, firstpos);
isc_pp_close (pp);
return cat + firstpos * 8;
}