+++ /dev/null
-/* $Id: isamd.c,v 1.27 2004-06-01 12:56:39 adam Exp $
- Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003
- 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 <yaz/log.h>
-#include "../index/index.h" /* isamd uses the internal structure of it_key */
-#include "isamd-p.h"
-
-static void flush_block (ISAMD is, int cat);
-static void release_fc (ISAMD is, int cat);
-static void init_fc (ISAMD is, int cat);
-
-#define ISAMD_FREELIST_CHUNK 1
-
-#define SMALL_TEST 0
-
-ISAMD_M *isamd_getmethod (ISAMD_M *me)
-{
- static struct ISAMD_filecat_s def_cat[] = {
-#if SMALL_TEST
-/* blocksz, max. Unused time being */
- { 32, 40 }, /* 24 is the smallest unreasonable size! */
- { 64, 0 },
-#else
- { 32, 1 },
- { 128, 1 },
- { 256, 1 },
- { 512, 1 },
- { 1024, 1 },
- { 2048, 1 },
- { 4096, 1 },
- { 8192, 0 },
-
-#endif
-#ifdef SKIPTHIS
-
-
-
- { 32, 1 },
- { 128, 1 },
- { 512, 1 },
- { 2048, 1 },
- { 8192, 1 },
- { 32768, 1 },
- {131072, 0 },
-
- { 24, 1 }, /* Experimental sizes */
- { 32, 1 },
- { 64, 1 },
- { 128, 1 },
- { 256, 1 },
- { 512, 1 },
- { 1024, 1 },
- { 2048, 0 },
-#endif
-
- };
- ISAMD_M *m = (ISAMD_M *) xmalloc (sizeof(*m)); /* never released! */
- m->filecat = def_cat; /* ok, only alloc'd once */
-
- m->code_start = NULL;
- m->code_item = NULL;
- m->code_stop = NULL;
- m->code_reset = NULL;
-
- m->compare_item = NULL;
- m->log_item = NULL;
-
- m->debug = 0; /* default to no debug */
-
- m->max_blocks_mem = 10;
-
- return m;
-}
-
-
-
-ISAMD isamd_open (BFiles bfs, const char *name, int writeflag, ISAMD_M *method)
-{
- ISAMD is;
- ISAMD_filecat filecat;
- int i = 0;
-
- is = (ISAMD) xmalloc (sizeof(*is));
-
- is->method = (ISAMD_M *) xmalloc (sizeof(*is->method));
- memcpy (is->method, method, sizeof(*method));
- filecat = is->method->filecat;
- assert (filecat);
-
- /* determine number of block categories */
- if (is->method->debug>0)
- logf (LOG_LOG, "isamd: bsize maxkeys");
- do
- {
- if (is->method->debug>0)
- logf (LOG_LOG, "isamd:%6d %6d",
- filecat[i].bsize, filecat[i].mblocks);
- } while (filecat[i++].mblocks);
- is->no_files = i;
- is->max_cat = --i;
-
- assert (is->no_files > 0);
- assert (is->max_cat <=8 ); /* we have only 3 bits for it */
-
- is->files = (ISAMD_file) xmalloc (sizeof(*is->files)*is->no_files);
-
- for (i = 0; i<is->no_files; i++)
- {
- char fname[512];
-
- sprintf (fname, "%s%c", name, i+'A');
- is->files[i].bf = bf_open (bfs, fname, is->method->filecat[i].bsize,
- writeflag);
- is->files[i].head_is_dirty = 0;
- if (!bf_read (is->files[i].bf, 0, 0, sizeof(ISAMD_head),
- &is->files[i].head))
- {
- is->files[i].head.lastblock = 1;
- is->files[i].head.freelist = 0;
- }
- is->files[i].alloc_entries_num = 0;
- is->files[i].alloc_entries_max =
- is->method->filecat[i].bsize / sizeof(int) - 1;
- is->files[i].alloc_buf = (char *)
- xmalloc (is->method->filecat[i].bsize);
- is->files[i].no_writes = 0; /* clear statistics */
- is->files[i].no_reads = 0;
- is->files[i].no_skip_writes = 0;
- is->files[i].no_allocated = 0;
- is->files[i].no_released = 0;
- is->files[i].no_remap = 0;
- is->files[i].no_forward = 0;
- is->files[i].no_backward = 0;
- is->files[i].sum_forward = 0;
- is->files[i].sum_backward = 0;
- is->files[i].no_next = 0;
- is->files[i].no_prev = 0;
- is->files[i].no_op_diffonly=0;
- is->files[i].no_op_main=0;
- init_fc (is, i);
- }
- is->last_pos=0;
- is->last_cat=0;
- is->no_read=0;
- is->no_read_main=0;
- is->no_write=0;
- is->no_op_single=0;
- is->no_op_new=0;
- is->no_read_keys=0;
- is->no_read_eof=0;
- is->no_seek_nxt=0;
- is->no_seek_sam=0;
- is->no_seek_fwd=0;
- is->no_seek_prv=0;
- is->no_seek_bak=0;
- is->no_seek_cat=0;
- is->no_fbuilds=0;
- is->no_appds=0;
- is->no_merges=0;
- is->no_non=0;
- is->no_singles=0;
-
- return is;
-}
-
-int isamd_block_used (ISAMD is, int type)
-{
- if ( type==-1) /* singleton */
- return 0;
- if (type < 0 || type >= is->no_files)
- return -1;
- return is->files[type].head.lastblock-1;
-}
-
-int isamd_block_size (ISAMD is, int type)
-{
- ISAMD_filecat filecat = is->method->filecat;
- if ( type==-1) /* singleton */
- return 0; /* no bytes used */
- if (type < 0 || type >= is->no_files)
- return -1;
- return filecat[type].bsize;
-}
-
-int isamd_close (ISAMD is)
-{
- int i;
- int s;
-
- if (is->method->debug>0)
- {
- logf (LOG_LOG, "isamd statistics");
- logf (LOG_LOG, "f nxt forw mid-f prev backw mid-b");
- for (i = 0; i<is->no_files; i++)
- logf (LOG_LOG, "%d%7d%7d%7.1f%7d%7d%7.1f",i,
- is->files[i].no_next,
- is->files[i].no_forward,
- is->files[i].no_forward ?
- (double) is->files[i].sum_forward/is->files[i].no_forward
- : 0.0,
- is->files[i].no_prev,
- is->files[i].no_backward,
- is->files[i].no_backward ?
- (double) is->files[i].sum_backward/is->files[i].no_backward
- : 0.0);
- }
- if (is->method->debug>0)
- logf (LOG_LOG, "f writes reads skipped alloc released ");
- for (i = 0; i<is->no_files; i++)
- {
- release_fc (is, i);
- assert (is->files[i].bf);
- if (is->files[i].head_is_dirty)
- bf_write (is->files[i].bf, 0, 0, sizeof(ISAMD_head),
- &is->files[i].head);
- if (is->method->debug>0)
- logf (LOG_LOG, "%d%8d%8d%8d%8d%8d",i,
- is->files[i].no_writes,
- is->files[i].no_reads,
- is->files[i].no_skip_writes,
- is->files[i].no_allocated,
- is->files[i].no_released);
- xfree (is->files[i].fc_list);
- flush_block (is, i);
- bf_close (is->files[i].bf);
- }
-
- if (is->method->debug>0)
- {
- logf (LOG_LOG, "f opens main diffonly");
- for (i = 0; i<is->no_files; i++)
- {
- logf (LOG_LOG, "%d%8d%8d%8d",i,
- is->files[i].no_op_main+
- is->files[i].no_op_diffonly,
- is->files[i].no_op_main,
- is->files[i].no_op_diffonly);
- }
- logf(LOG_LOG,"open single %8d", is->no_op_single);
- logf(LOG_LOG,"open new %8d", is->no_op_new);
-
- logf(LOG_LOG, "new build %8d", is->no_fbuilds);
- logf(LOG_LOG, "append %8d", is->no_appds);
- logf(LOG_LOG, " merges %8d", is->no_merges);
- logf(LOG_LOG, " singles %8d", is->no_singles);
- logf(LOG_LOG, " no-ops %8d", is->no_non);
-
- logf(LOG_LOG, "read blocks %8d", is->no_read);
- logf(LOG_LOG, "read keys: %8d %8.1f k/bl",
- is->no_read_keys,
- 1.0*(is->no_read_keys+1)/(is->no_read+1) );
- logf(LOG_LOG, "read main-k %8d %8.1f %% of keys",
- is->no_read_main,
- 100.0*(is->no_read_main+1)/(is->no_read_keys+1) );
- logf(LOG_LOG, "read ends: %8d %8.1f k/e",
- is->no_read_eof,
- 1.0*(is->no_read_keys+1)/(is->no_read_eof+1) );
- s= is->no_seek_nxt+ is->no_seek_sam+ is->no_seek_fwd +
- is->no_seek_prv+ is->no_seek_bak+ is->no_seek_cat;
- if (s==0)
- s++;
- logf(LOG_LOG, "seek same %8d %8.1f%%",
- is->no_seek_sam, 100.0*is->no_seek_sam/s );
- logf(LOG_LOG, "seek next %8d %8.1f%%",
- is->no_seek_nxt, 100.0*is->no_seek_nxt/s );
- logf(LOG_LOG, "seek prev %8d %8.1f%%",
- is->no_seek_prv, 100.0*is->no_seek_prv/s );
- logf(LOG_LOG, "seek forw %8d %8.1f%%",
- is->no_seek_fwd, 100.0*is->no_seek_fwd/s );
- logf(LOG_LOG, "seek back %8d %8.1f%%",
- is->no_seek_bak, 100.0*is->no_seek_bak/s );
- logf(LOG_LOG, "seek cat %8d %8.1f%%",
- is->no_seek_cat, 100.0*is->no_seek_cat/s );
- }
- xfree (is->files);
- xfree (is->method);
- xfree (is);
- return 0;
-}
-
-static void isamd_seek_stat(ISAMD is, int cat, int pos)
-{
- if (cat != is->last_cat)
- is->no_seek_cat++;
- else if ( pos == is->last_pos)
- is->no_seek_sam++;
- else if ( pos == is->last_pos+1)
- is->no_seek_nxt++;
- else if ( pos == is->last_pos-1)
- is->no_seek_prv++;
- else if ( pos > is->last_pos)
- is->no_seek_fwd++;
- else if ( pos < is->last_pos)
- is->no_seek_bak++;
- is->last_cat = cat;
- is->last_pos = pos;
-} /* seek_stat */
-
-int isamd_read_block (ISAMD is, int cat, int pos, char *dst)
-{
- isamd_seek_stat(is,cat,pos);
- ++(is->files[cat].no_reads);
- ++(is->no_read);
- if (is->method->debug > 6)
- logf (LOG_LOG, "isamd: read_block %d:%d",cat, pos);
- return bf_read (is->files[cat].bf, pos, 0, 0, dst);
-}
-
-int isamd_write_block (ISAMD is, int cat, int pos, char *src)
-{
- isamd_seek_stat(is,cat,pos);
- ++(is->files[cat].no_writes);
- ++(is->no_write);
- if (is->method->debug > 6)
- logf (LOG_LOG, "isamd: write_block %d:%d", cat, pos);
- return bf_write (is->files[cat].bf, pos, 0, 0, src);
-}
-
-int isamd_write_dblock (ISAMD is, int cat, int pos, char *src,
- int nextpos, int offset)
-{
- ISAMD_BLOCK_SIZE size = offset + ISAMD_BLOCK_OFFSET_N;
- if (is->method->debug > 4)
- logf (LOG_LOG, "isamd: write_dblock. size=%d nextpos=%d",
- (int) size, nextpos);
- src -= ISAMD_BLOCK_OFFSET_N;
- assert( ISAMD_BLOCK_OFFSET_N == sizeof(int)+sizeof(int) );
- memcpy (src, &nextpos, sizeof(int));
- memcpy (src + sizeof(int), &size, sizeof(size));
- return isamd_write_block (is, cat, pos, src);
-}
-
-#if ISAMD_FREELIST_CHUNK
-static void flush_block (ISAMD is, int cat)
-{
- char *abuf = is->files[cat].alloc_buf;
- int block = is->files[cat].head.freelist;
- if (block && is->files[cat].alloc_entries_num)
- {
- memcpy (abuf, &is->files[cat].alloc_entries_num, sizeof(int));
- bf_write (is->files[cat].bf, block, 0, 0, abuf);
- is->files[cat].alloc_entries_num = 0;
- }
- xfree (abuf);
-}
-
-static int alloc_block (ISAMD is, int cat)
-{
- int block = is->files[cat].head.freelist;
- char *abuf = is->files[cat].alloc_buf;
-
- (is->files[cat].no_allocated)++;
-
- if (!block)
- {
- block = (is->files[cat].head.lastblock)++; /* no free list */
- is->files[cat].head_is_dirty = 1;
- }
- else
- {
- if (!is->files[cat].alloc_entries_num) /* read first time */
- {
- bf_read (is->files[cat].bf, block, 0, 0, abuf);
- memcpy (&is->files[cat].alloc_entries_num, abuf,
- sizeof(is->files[cat].alloc_entries_num));
- assert (is->files[cat].alloc_entries_num > 0);
- }
- /* have some free blocks now */
- assert (is->files[cat].alloc_entries_num > 0);
- is->files[cat].alloc_entries_num--;
- if (!is->files[cat].alloc_entries_num) /* last one in block? */
- {
- memcpy (&is->files[cat].head.freelist, abuf + sizeof(int),
- sizeof(int));
- is->files[cat].head_is_dirty = 1;
-
- if (is->files[cat].head.freelist)
- {
- bf_read (is->files[cat].bf, is->files[cat].head.freelist,
- 0, 0, abuf);
- memcpy (&is->files[cat].alloc_entries_num, abuf,
- sizeof(is->files[cat].alloc_entries_num));
- assert (is->files[cat].alloc_entries_num);
- }
- }
- else
- memcpy (&block, abuf + sizeof(int) + sizeof(int) *
- is->files[cat].alloc_entries_num, sizeof(int));
- }
- return block;
-}
-
-static void release_block (ISAMD is, int cat, int pos)
-{
- char *abuf = is->files[cat].alloc_buf;
- int block = is->files[cat].head.freelist;
-
- (is->files[cat].no_released)++;
-
- if (block && !is->files[cat].alloc_entries_num) /* must read block */
- {
- bf_read (is->files[cat].bf, block, 0, 0, abuf);
- memcpy (&is->files[cat].alloc_entries_num, abuf,
- sizeof(is->files[cat].alloc_entries_num));
- assert (is->files[cat].alloc_entries_num > 0);
- }
- assert (is->files[cat].alloc_entries_num <= is->files[cat].alloc_entries_max);
- if (is->files[cat].alloc_entries_num == is->files[cat].alloc_entries_max)
- {
- assert (block);
- memcpy (abuf, &is->files[cat].alloc_entries_num, sizeof(int));
- bf_write (is->files[cat].bf, block, 0, 0, abuf);
- is->files[cat].alloc_entries_num = 0;
- }
- if (!is->files[cat].alloc_entries_num) /* make new buffer? */
- {
- memcpy (abuf + sizeof(int), &block, sizeof(int));
- 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++;
-}
-#else
-static void flush_block (ISAMD is, int cat)
-{
- char *abuf = is->files[cat].alloc_buf;
- xfree (abuf);
-}
-
-static int alloc_block (ISAMD is, int cat)
-{
- int block;
- char buf[sizeof(int)];
-
- 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));
- }
- else
- block = (is->files[cat].head.lastblock)++;
- return block;
-}
-
-static void release_block (ISAMD is, int cat, int pos)
-{
- char buf[sizeof(int)];
-
- (is->files[cat].no_released)++;
- is->files[cat].head_is_dirty = 1;
- memcpy (buf, &is->files[cat].head.freelist, sizeof(int));
- is->files[cat].head.freelist = pos;
- bf_write (is->files[cat].bf, pos, 0, sizeof(int), buf);
-}
-#endif
-
-int isamd_alloc_block (ISAMD is, int cat)
-{
- int block = 0;
-
- if (is->files[cat].fc_list)
- {
- int j, nb;
- for (j = 0; j < is->files[cat].fc_max; j++)
- if ((nb = is->files[cat].fc_list[j]) && (!block || nb < block))
- {
- is->files[cat].fc_list[j] = 0;
- block = nb;
- break;
- }
- }
- if (!block)
- block = alloc_block (is, cat);
- if (is->method->debug > 4)
- logf (LOG_LOG, "isamd: alloc_block in cat %d: %d", cat, block);
- return block;
-}
-
-void isamd_release_block (ISAMD is, int cat, int pos)
-{
- if (is->method->debug > 4)
- logf (LOG_LOG, "isamd: release_block in cat %d: %d", cat, pos);
- assert(pos!=0);
-
- if (is->files[cat].fc_list)
- {
- int j;
- for (j = 0; j<is->files[cat].fc_max; j++)
- if (!is->files[cat].fc_list[j])
- {
- is->files[cat].fc_list[j] = pos;
- return;
- }
- }
- release_block (is, cat, pos);
-}
-
-static void init_fc (ISAMD is, int cat)
-{
- int j = 100;
-
- is->files[cat].fc_max = j;
- is->files[cat].fc_list = (int *)
- xmalloc (sizeof(*is->files[0].fc_list) * j);
- while (--j >= 0)
- is->files[cat].fc_list[j] = 0;
-}
-
-static void release_fc (ISAMD is, int cat)
-{
- int b, j = is->files[cat].fc_max;
-
- while (--j >= 0)
- if ((b = is->files[cat].fc_list[j]))
- {
- release_block (is, cat, b);
- is->files[cat].fc_list[j] = 0;
- }
-}
-
-void isamd_pp_close (ISAMD_PP pp)
-{
- ISAMD is = pp->is;
-
- (*is->method->code_stop)(ISAMD_DECODE, pp->decodeClientData);
- isamd_free_diffs(pp); /* see merge-d.h */
- if (is->method->debug > 5)
- logf (LOG_LOG, "isamd_pp_close %p %d=%d:%d sz=%d n=%d=%d:%d nk=%d",
- pp, isamd_addr(pp->pos, pp->cat), pp->cat, pp->pos, pp->size,
- pp->next, isamd_type(pp->next), isamd_block(pp->next),
- pp->numKeys );
- xfree (pp->buf);
- xfree (pp);
-}
-
-
-ISAMD_PP isamd_pp_create (ISAMD is, int cat)
-/* creates a pp_buff without data in it. pos=0, cat as given */
-{
- ISAMD_PP pp = (ISAMD_PP) xmalloc (sizeof(*pp));
- int sz = is->method->filecat[is->max_cat].bsize;
-
- pp->numKeys = 0;
- pp->buf = (char *) xmalloc (sz);
- memset(pp->buf,'\0',sz); /* clear the buffer, for new blocks */
-
- pp->next = 0;
- pp->size = 0;
- pp->offset = 0;
- pp->is = is;
- pp->diffs=0;
- pp->diffbuf=0;
- pp->diffinfo=0;
- pp->decodeClientData = (*is->method->code_start)(ISAMD_DECODE);
- pp->cat = cat;
- pp->pos = 0;
- is->no_op_new++;
- return pp;
-
-}
-
-
-ISAMD_PP isamd_pp_open (ISAMD is, const char *dictbuf, int dictlen)
-{
- ISAMD_P ipos;
- ISAMD_PP pp = (ISAMD_PP) xmalloc (sizeof(*pp));
- char *src;
- int sz = is->method->filecat[is->max_cat].bsize;
- /* always allocate for the largest blocks, saves trouble */
- int dictnum;
-
- pp->numKeys = 0;
- src = pp->buf = (char *) xmalloc (sz);
- memset(src,'\0',sz); /* clear the buffer, for new blocks */
-
- pp->next = 0;
- pp->size = 0;
- pp->offset = 0;
- pp->is = is;
- pp->diffs=0;
- pp->diffbuf=0;
- pp->diffinfo=0;
- pp->decodeClientData = (*is->method->code_start)(ISAMD_DECODE);
-
- dictnum=*dictbuf; /* numkeys for internals, 0 for externals */
-
- if (0==dictnum)
- {
- memcpy(&ipos, dictbuf+1, sizeof(ISAMD_P) );
- }
- else /* dictionary block, fake a real one */
- {
- pp->cat=0;
- pp->pos=0;
- if (is->method->debug > 5)
- logf (LOG_LOG, "isamd_pp_open dict");
- pp->numKeys=(unsigned char) dictbuf[0];
- memcpy(pp->buf+ISAMD_BLOCK_OFFSET_1, dictbuf+1,dictlen-1);
- pp->size=pp->offset=dictlen+ISAMD_BLOCK_OFFSET_1-1;
- is->no_op_single++;
- return pp;
- } /* dict block */
-
- pp->cat = isamd_type(ipos);
- pp->pos = isamd_block(ipos);
-
- if (0==pp->pos)
- is->no_op_new++;
-
- if (pp->pos)
- {
- src = pp->buf;
- isamd_read_block (is, pp->cat, pp->pos, src);
- memcpy (&pp->next, src, sizeof(pp->next));
- src += sizeof(pp->next);
- memcpy (&pp->size, src, sizeof(pp->size));
- src += sizeof(pp->size);
- memcpy (&pp->numKeys, src, sizeof(pp->numKeys));
- src += sizeof(pp->numKeys);
- assert (pp->next != isamd_addr(pp->pos,pp->cat));
- pp->offset = src - pp->buf;
- assert (pp->offset == ISAMD_BLOCK_OFFSET_1);
- assert(pp->size>=ISAMD_BLOCK_OFFSET_1); /*??*/
- if (pp->next)
- is->files[pp->cat].no_op_main++;
- else
- is->files[pp->cat].no_op_diffonly++;
- }
- if (is->method->debug > 5)
- logf (LOG_LOG, "isamd_pp_open %p %d=%d:%d sz=%d n=%d=%d:%d",
- pp, isamd_addr(pp->pos, pp->cat), pp->cat, pp->pos, pp->size,
- pp->next, isamd_type(pp->next), isamd_block(pp->next) );
-
- return pp;
-}
-
-
-
-void isamd_buildfirstblock(ISAMD_PP pp){
- char *dst=pp->buf;
- assert(pp->buf);
- assert(pp->next != isamd_addr(pp->pos,pp->cat));
- memcpy(dst, &pp->next, sizeof(pp->next) );
- dst += sizeof(pp->next);
- memcpy(dst, &pp->size,sizeof(pp->size));
- dst += sizeof(pp->size);
- memcpy(dst, &pp->numKeys, sizeof(pp->numKeys));
- dst += sizeof(pp->numKeys);
- assert (dst - pp->buf == ISAMD_BLOCK_OFFSET_1);
- if (pp->is->method->debug > 5)
- logf (LOG_LOG, "isamd: bldfirst: p=%d=%d:%d n=%d:%d:%d sz=%d nk=%d ",
- isamd_addr(pp->pos,pp->cat),pp->cat, pp->pos,
- pp->next, isamd_type(pp->next), isamd_block(pp->next),
- pp->size, pp->numKeys);
-}
-
-void isamd_buildlaterblock(ISAMD_PP pp){
- char *dst=pp->buf;
- assert(pp->buf);
- assert(pp->next != isamd_addr(pp->pos,pp->cat));
- memcpy(dst, &pp->next, sizeof(pp->next) );
- dst += sizeof(pp->next);
- memcpy(dst, &pp->size,sizeof(pp->size));
- dst += sizeof(pp->size);
- assert (dst - pp->buf == ISAMD_BLOCK_OFFSET_N);
- if (pp->is->method->debug > 5)
- logf (LOG_LOG, "isamd: l8r: sz=%d p=%d/%d>%d/%d",
- pp->size,
- pp->pos, pp->cat,
- isamd_block(pp->next), isamd_type(pp->next) );
-}
-
-
-
-/* returns non-zero if item could be read; 0 otherwise */
-int isamd_pp_read (ISAMD_PP pp, void *buf)
-{
-
- return isamd_read_item (pp, (char **) &buf);
- /* note: isamd_read_item is in merge-d.c, because it is so */
- /* convoluted with the merge process */
-}
-
-/* read one main item from file - decode and store it in *dst.
- Does not worry about diffs
- Returns
- 0 if end-of-file
- 1 if item could be read ok
-*/
-int isamd_read_main_item (ISAMD_PP pp, char **dst)
-{
- ISAMD is = pp->is;
- char *src = pp->buf + pp->offset;
- int newcat;
- int oldoffs;
-
- if (pp->offset >= pp->size)
- {
- if (!pp->next)
- {
- pp->pos = 0;
- return 0; /* end of file */
- }
- if (pp->next > pp->pos)
- {
- if (pp->next == pp->pos + 1)
- is->files[pp->cat].no_next++;
- else
- {
- is->files[pp->cat].no_forward++;
- is->files[pp->cat].sum_forward += pp->next - pp->pos;
- }
- }
- else
- {
- if (pp->next + 1 == pp->pos)
- is->files[pp->cat].no_prev++;
- else
- {
- is->files[pp->cat].no_backward++;
- is->files[pp->cat].sum_backward += pp->pos - pp->next;
- }
- }
- /* out new block position */
- newcat = isamd_type(pp->next);
- pp->pos = isamd_block(pp->next);
- pp->cat = isamd_type(pp->next);
- pp->is->no_read_main++;
- src = pp->buf;
- /* read block and save 'next' and 'size' entry */
- isamd_read_block (is, pp->cat, pp->pos, src);
- 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 */
- pp->offset = oldoffs = src - pp->buf;
- assert (pp->offset == ISAMD_BLOCK_OFFSET_N);
- assert (pp->next != isamd_addr(pp->pos,pp->cat));
- (*is->method->code_reset)(pp->decodeClientData);
- /* finally, read the item */
- (*is->method->code_item)(ISAMD_DECODE, pp->decodeClientData, dst, &src);
- pp->offset = src - pp->buf;
- if (is->method->debug > 8)
- logf (LOG_LOG, "isamd: read_m: block %d:%d sz=%d ofs=%d-%d next=%d",
- pp->cat, pp->pos, pp->size, oldoffs, pp->offset, pp->next);
- return 2;
- }
- oldoffs=pp->offset;
- (*is->method->code_item)(ISAMD_DECODE, pp->decodeClientData, dst, &src);
- pp->offset = src - pp->buf;
- if (is->method->debug > 8)
- logf (LOG_LOG, "isamd: read_m: got %d:%d sz=%d ofs=%d-%d next=%d",
- pp->cat, pp->pos, pp->size, oldoffs, pp->offset, pp->next);
- return 1;
-}
-
-int isamd_pp_num (ISAMD_PP pp)
-{
- return pp->numKeys;
-}
-
-#if 0
-/* for testing .. */
-static char *hexdump(unsigned char *p, int len, char *buff) {
- static char localbuff[128];
- char bytebuff[8];
- if (!buff) buff=localbuff;
- *buff='\0';
- while (len--) {
- sprintf(bytebuff,"%02x",*p);
- p++;
- strcat(buff,bytebuff);
- if (len) strcat(buff," ");
- }
- return buff;
-}
-#endif
-
-#ifdef SKIPTHIS
- /* needs different arguments, or something */
-void isamd_pp_dump (ISAMD is, ISAMD_P ipos)
-{
- ISAMD_PP pp;
- ISAMD_P oldaddr=0;
- struct it_key key;
- int i,n;
- int occur =0;
- int oldoffs;
- int diffmax=1;
- int diffidx;
- char hexbuff[64];
- int olddebug= is->method->debug;
- is->method->debug=0; /* no debug logs while reading for dump */
-
- logf(LOG_LOG,"dumping isamd block %d (%d:%d)",
- (int)ipos, isamd_type(ipos), isamd_block(ipos) );
- pp=isamd_pp_open(is,ipos);
- logf(LOG_LOG,"numKeys=%d, ofs=%d sz=%d",
- pp->numKeys, pp->offset, pp->size );
- diffidx=oldoffs= pp->offset;
- while ((diffidx < is->method->filecat[pp->cat].bsize) && (diffmax>0))
- {
- memcpy(&diffmax,&(pp->buf[diffidx]),sizeof(int));
- logf (LOG_LOG,"diff set at %d-%d: %s", diffidx, diffmax,
- hexdump(pp->buf+diffidx,8,0));
- /*! todo: dump the actual diffs as well !!! */
- diffidx=diffmax;
-
- } /* dump diffs */
- while(isamd_pp_read(pp, &key))
- {
- if (oldaddr != isamd_addr(pp->pos,pp->cat) )
- {
- oldaddr = isamd_addr(pp->pos,pp->cat);
- logf(LOG_LOG,"block %d=%d:%d sz=%d nx=%d=%d:%d ofs=%d",
- isamd_addr(pp->pos,pp->cat), pp->cat, pp->pos,
- pp->size,
- pp->next, isamd_type(pp->next), isamd_block(pp->next),
- pp->offset);
- i=0;
- while (i<pp->size) {
- n=pp->size-i;
- if (n>8) n=8;
- logf(LOG_LOG," %05x: %s",i,hexdump(pp->buf+i,n,hexbuff));
- i+=n;
- }
- if (oldoffs > ISAMD_BLOCK_OFFSET_N)
- oldoffs=ISAMD_BLOCK_OFFSET_N;
- } /* new block */
- occur++;
- logf (LOG_LOG," got %d:%d=%x:%x from %s at %d=%x",
- key.sysno, key.seqno,
- key.sysno, key.seqno,
- hexdump(pp->buf+oldoffs, pp->offset-oldoffs, hexbuff),
- oldoffs, oldoffs);
- oldoffs = pp->offset;
- }
- /*!*/ /*TODO: dump diffs too!!! */
- isamd_pp_close(pp);
- is->method->debug=olddebug;
-} /* dump */
-
-#endif
-
projects / idzebra-moved-to-github.git / blobdiff