-/*
- * Copyright (c) 1995-1998, Index Data.
- * See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: isamc.c,v $
- * Revision 1.21 2002-06-19 10:29:18 adam
- * align block sizes for isam sys. Better plot for test
- *
- * Revision 1.20 1999/11/30 13:48:04 adam
- * Improved installation. Updated for inclusion of YAZ header files.
- *
- * Revision 1.19 1999/07/14 10:59:27 adam
- * Changed functions isc_getmethod, isams_getmethod.
- * Improved fatal error handling (such as missing EXPLAIN schema).
- *
- * Revision 1.18 1999/06/30 09:08:23 adam
- * Added coder to reset.
- *
- * Revision 1.17 1999/05/26 07:49:14 adam
- * C++ compilation.
- *
- * Revision 1.16 1998/05/27 14:32:03 adam
- * Changed default block category layout.
- *
- * Revision 1.15 1998/05/20 10:12:25 adam
- * Implemented automatic EXPLAIN database maintenance.
- * Modified Zebra to work with ASN.1 compiled version of YAZ.
- *
- * Revision 1.14 1998/03/19 10:04:35 adam
- * Minor changes.
- *
- * Revision 1.13 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 1.12 1998/03/16 10:37:24 adam
- * Added more statistics.
- *
- * Revision 1.11 1998/03/13 15:30:50 adam
- * New functions isc_block_used and isc_block_size. Fixed 'leak'
- * in isc_alloc_block.
- *
- * Revision 1.10 1998/03/11 11:18:18 adam
- * Changed the isc_merge to take into account the mfill (minimum-fill).
- *
- * Revision 1.9 1998/03/06 13:54:02 adam
- * Fixed two nasty bugs in isc_merge.
- *
- * Revision 1.8 1997/09/17 12:19:20 adam
- * Zebra version corresponds to YAZ version 1.4.
- * Changed Zebra server so that it doesn't depend on global common_resource.
- *
- * Revision 1.7 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 1.6 1996/11/08 11:15:29 adam
- * Number of keys in chain are stored in first block and the function
- * to retrieve this information, isc_pp_num is implemented.
- *
- * Revision 1.5 1996/11/04 14:08:57 adam
- * Optimized free block usage.
- *
- * Revision 1.4 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 1.3 1996/11/01 08:59:14 adam
- * First version of isc_merge that supports update/delete.
- *
- * Revision 1.2 1996/10/29 16:44:56 adam
- * Work on isc_merge.
- *
- * Revision 1.1 1996/10/29 13:40:48 adam
- * First work.
- *
- */
+/* $Id: isamc.c,v 1.25 2004-08-04 08:35:24 adam Exp $
+ Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
+ 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.
+*/
/*
* TODO:
static void release_fc (ISAMC is, int cat);
static void init_fc (ISAMC is, int cat);
-#define ISAMC_FREELIST_CHUNK 1
+#define ISAMC_FREELIST_CHUNK 0
#define SMALL_TEST 0
-void isc_getmethod (ISAMC_M m)
+void isc_getmethod (ISAMC_M *m)
{
static struct ISAMC_filecat_s def_cat[] = {
{ 32, 28, 0, 3 },
{ 64, 54, 30, 0 },
#else
- { 32, 26, 20, 10 },
+ { 64, 56, 40, 5 },
{ 128, 120, 100, 10 },
{ 512, 490, 350, 10 },
{ 2048, 1900, 1700, 10 },
};
m->filecat = def_cat;
- m->code_start = NULL;
- m->code_item = NULL;
- m->code_stop = NULL;
- m->code_reset = NULL;
+ m->codec.start = NULL;
+ m->codec.decode = NULL;
+ m->codec.encode = NULL;
+ m->codec.stop = NULL;
+ m->codec.reset = NULL;
m->compare_item = NULL;
+ m->log_item = NULL;
m->debug = 1;
m->max_blocks_mem = 10;
}
-ISAMC isc_open (BFiles bfs, const char *name, int writeflag, ISAMC_M method)
+ISAMC isc_open (BFiles bfs, const char *name, int writeflag, ISAMC_M *method)
{
ISAMC is;
ISAMC_filecat filecat;
is = (ISAMC) xmalloc (sizeof(*is));
- is->method = (ISAMC_M) xmalloc (sizeof(*is->method));
+ is->method = (ISAMC_M *) xmalloc (sizeof(*is->method));
memcpy (is->method, method, sizeof(*method));
filecat = is->method->filecat;
assert (filecat);
}
is->files[i].alloc_entries_num = 0;
is->files[i].alloc_entries_max =
- is->method->filecat[i].bsize / sizeof(int) - 1;
+ is->method->filecat[i].bsize / sizeof(zint) - 1;
is->files[i].alloc_buf = (char *)
xmalloc (is->method->filecat[i].bsize);
is->files[i].no_writes = 0;
return is;
}
-int isc_block_used (ISAMC is, int type)
+zint isc_block_used (ISAMC is, int type)
{
if (type < 0 || type >= is->no_files)
return -1;
return 0;
}
-int isc_read_block (ISAMC is, int cat, int pos, char *dst)
+int isc_read_block (ISAMC is, int cat, zint pos, char *dst)
{
++(is->files[cat].no_reads);
return bf_read (is->files[cat].bf, pos, 0, 0, dst);
}
-int isc_write_block (ISAMC is, int cat, int pos, char *src)
+int isc_write_block (ISAMC is, int cat, zint pos, char *src)
{
++(is->files[cat].no_writes);
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: write_block %d %d", cat, pos);
+ logf (LOG_LOG, "isc: write_block %d " ZINT_FORMAT, cat, pos);
return bf_write (is->files[cat].bf, pos, 0, 0, src);
}
-int isc_write_dblock (ISAMC is, int cat, int pos, char *src,
- int nextpos, int offset)
+int isc_write_dblock (ISAMC is, int cat, zint pos, char *src,
+ zint nextpos, int offset)
{
ISAMC_BLOCK_SIZE size = offset + ISAMC_BLOCK_OFFSET_N;
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: write_dblock. size=%d nextpos=%d",
+ logf (LOG_LOG, "isc: write_dblock. size=%d nextpos=" ZINT_FORMAT,
(int) size, nextpos);
src -= ISAMC_BLOCK_OFFSET_N;
- memcpy (src, &nextpos, sizeof(int));
- memcpy (src + sizeof(int), &size, sizeof(size));
+ memcpy (src, &nextpos, sizeof(nextpos));
+ memcpy (src + sizeof(nextpos), &size, sizeof(size));
return isc_write_block (is, cat, pos, src);
}
static void flush_block (ISAMC is, int cat)
{
char *abuf = is->files[cat].alloc_buf;
- int block = is->files[cat].head.freelist;
+ zint block = is->files[cat].head.freelist;
if (block && is->files[cat].alloc_entries_num)
{
- memcpy (abuf, &is->files[cat].alloc_entries_num, sizeof(int));
+ memcpy (abuf, &is->files[cat].alloc_entries_num, sizeof(block));
bf_write (is->files[cat].bf, block, 0, 0, abuf);
is->files[cat].alloc_entries_num = 0;
}
xfree (abuf);
}
-static int alloc_block (ISAMC is, int cat)
+static zint alloc_block (ISAMC is, int cat)
{
- int block = is->files[cat].head.freelist;
+ zint block = is->files[cat].head.freelist;
char *abuf = is->files[cat].alloc_buf;
(is->files[cat].no_allocated)++;
if (!is->files[cat].alloc_entries_num) /* last one in block? */
{
memcpy (&is->files[cat].head.freelist, abuf + sizeof(int),
- sizeof(int));
+ sizeof(zint));
is->files[cat].head_is_dirty = 1;
if (is->files[cat].head.freelist)
}
}
else
- memcpy (&block, abuf + sizeof(int) + sizeof(int) *
- is->files[cat].alloc_entries_num, sizeof(int));
+ memcpy (&block, abuf + sizeof(zint) + sizeof(int) *
+ is->files[cat].alloc_entries_num, sizeof(zint));
}
return block;
}
-static void release_block (ISAMC is, int cat, int pos)
+static void release_block (ISAMC is, int cat, zint pos)
{
char *abuf = is->files[cat].alloc_buf;
- int block = is->files[cat].head.freelist;
+ zint block = is->files[cat].head.freelist;
(is->files[cat].no_released)++;
}
if (!is->files[cat].alloc_entries_num) /* make new buffer? */
{
- memcpy (abuf + sizeof(int), &block, sizeof(int));
+ memcpy (abuf + sizeof(int), &block, sizeof(zint));
is->files[cat].head.freelist = pos;
is->files[cat].head_is_dirty = 1;
}
else
{
memcpy (abuf + sizeof(int) +
- is->files[cat].alloc_entries_num*sizeof(int),
- &pos, sizeof(int));
+ is->files[cat].alloc_entries_num*sizeof(zint),
+ &pos, sizeof(zint));
}
is->files[cat].alloc_entries_num++;
}
xfree (abuf);
}
-static int alloc_block (ISAMC is, int cat)
+static zint alloc_block (ISAMC is, int cat)
{
- int block;
- char buf[sizeof(int)];
+ zint block;
+ char buf[sizeof(zint)];
is->files[cat].head_is_dirty = 1;
(is->files[cat].no_allocated)++;
if ((block = is->files[cat].head.freelist))
{
- bf_read (is->files[cat].bf, block, 0, sizeof(int), buf);
- memcpy (&is->files[cat].head.freelist, buf, sizeof(int));
+ bf_read (is->files[cat].bf, block, 0, sizeof(zint), buf);
+ memcpy (&is->files[cat].head.freelist, buf, sizeof(zint));
}
else
block = (is->files[cat].head.lastblock)++;
return block;
}
-static void release_block (ISAMC is, int cat, int pos)
+static void release_block (ISAMC is, int cat, zint pos)
{
- char buf[sizeof(int)];
+ char buf[sizeof(zint)];
(is->files[cat].no_released)++;
is->files[cat].head_is_dirty = 1;
- memcpy (buf, &is->files[cat].head.freelist, sizeof(int));
+ memcpy (buf, &is->files[cat].head.freelist, sizeof(zint));
is->files[cat].head.freelist = pos;
- bf_write (is->files[cat].bf, pos, 0, sizeof(int), buf);
+ bf_write (is->files[cat].bf, pos, 0, sizeof(zint), buf);
}
#endif
-int isc_alloc_block (ISAMC is, int cat)
+zint isc_alloc_block (ISAMC is, int cat)
{
- int block = 0;
+ zint block = 0;
if (is->files[cat].fc_list)
{
- int j, nb;
+ int j;
+ zint nb;
for (j = 0; j < is->files[cat].fc_max; j++)
if ((nb = is->files[cat].fc_list[j]) && (!block || nb < block))
{
if (!block)
block = alloc_block (is, cat);
if (is->method->debug > 3)
- logf (LOG_LOG, "isc: alloc_block in cat %d: %d", cat, block);
+ logf (LOG_LOG, "isc: alloc_block in cat %d: " ZINT_FORMAT, cat, block);
return block;
}
-void isc_release_block (ISAMC is, int cat, int pos)
+void isc_release_block (ISAMC is, int cat, zint pos)
{
if (is->method->debug > 3)
- logf (LOG_LOG, "isc: release_block in cat %d: %d", cat, pos);
+ logf (LOG_LOG, "isc: release_block in cat %d:" ZINT_FORMAT, cat, pos);
if (is->files[cat].fc_list)
{
int j;
{
ISAMC is = pp->is;
- (*is->method->code_stop)(ISAMC_DECODE, pp->decodeClientData);
+ (*is->method->codec.stop)(pp->decodeClientData);
xfree (pp->buf);
xfree (pp);
}
pp->size = 0;
pp->offset = 0;
pp->is = is;
- pp->decodeClientData = (*is->method->code_start)(ISAMC_DECODE);
+ pp->decodeClientData = (*is->method->codec.start)();
pp->deleteFlag = 0;
pp->numKeys = 0;
src += sizeof(pp->size);
memcpy (&pp->numKeys, src, sizeof(pp->numKeys));
src += sizeof(pp->numKeys);
- assert (pp->next != pp->pos);
+ if (pp->next == pp->pos)
+ {
+ yaz_log(LOG_FATAL|LOG_LOG, "pp->next = " ZINT_FORMAT, pp->next);
+ yaz_log(LOG_FATAL|LOG_LOG, "pp->pos = " ZINT_FORMAT, pp->pos);
+ assert (pp->next != pp->pos);
+ }
pp->offset = src - pp->buf;
assert (pp->offset == ISAMC_BLOCK_OFFSET_1);
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: read_block size=%d %d %d next=%d",
- pp->size, pp->cat, pp->pos, pp->next);
+ logf (LOG_LOG, "isc: read_block size=%d %d " ZINT_FORMAT " next="
+ ZINT_FORMAT, pp->size, pp->cat, pp->pos, pp->next);
}
return pp;
}
/* returns non-zero if item could be read; 0 otherwise */
int isc_pp_read (ISAMC_PP pp, void *buf)
{
- return isc_read_item (pp, (char **) &buf);
+ char *cp = buf;
+ return isc_read_item (pp, &cp);
}
/* read one item from file - decode and store it in *dst.
int isc_read_item (ISAMC_PP pp, char **dst)
{
ISAMC is = pp->is;
- char *src = pp->buf + pp->offset;
+ const char *src = pp->buf + pp->offset;
if (pp->offset >= pp->size)
{
pp->pos = pp->next;
src = pp->buf;
/* read block and save 'next' and 'size' entry */
- isc_read_block (is, pp->cat, pp->pos, src);
+ isc_read_block (is, pp->cat, pp->pos, pp->buf);
memcpy (&pp->next, src, sizeof(pp->next));
src += sizeof(pp->next);
memcpy (&pp->size, src, sizeof(pp->size));
src += sizeof(pp->size);
/* assume block is non-empty */
assert (src - pp->buf == ISAMC_BLOCK_OFFSET_N);
- assert (pp->next != pp->pos);
+
+ if (pp->next == pp->pos)
+ {
+ yaz_log(LOG_FATAL|LOG_LOG, "pp->next = " ZINT_FORMAT, pp->next);
+ yaz_log(LOG_FATAL|LOG_LOG, "pp->pos = " ZINT_FORMAT, pp->pos);
+ assert (pp->next != pp->pos);
+ }
+
if (pp->deleteFlag)
isc_release_block (is, pp->cat, pp->pos);
- (*is->method->code_item)(ISAMC_DECODE, pp->decodeClientData, dst, &src);
+ (*is->method->codec.decode)(pp->decodeClientData, dst, &src);
pp->offset = src - pp->buf;
if (is->method->debug > 2)
- logf (LOG_LOG, "isc: read_block size=%d %d %d next=%d",
- pp->size, pp->cat, pp->pos, pp->next);
+ logf (LOG_LOG, "isc: read_block size=%d %d " ZINT_FORMAT " next="
+ ZINT_FORMAT, pp->size, pp->cat, pp->pos, pp->next);
return 2;
}
- (*is->method->code_item)(ISAMC_DECODE, pp->decodeClientData, dst, &src);
+ (*is->method->codec.decode)(pp->decodeClientData, dst, &src);
pp->offset = src - pp->buf;
return 1;
}
-int isc_pp_num (ISAMC_PP pp)
+zint isc_pp_num (ISAMC_PP pp)
{
return pp->numKeys;
}
projects / idzebra-moved-to-github.git / blobdiff