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odeum.c
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odeum.c
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/*************************************************************************************************
* Implementation of Odeum
* Copyright (C) 2000-2007 Mikio Hirabayashi
* This file is part of QDBM, Quick Database Manager.
* QDBM is free software; you can redistribute it and/or modify it under the terms of the GNU
* Lesser General Public License as published by the Free Software Foundation; either version
* 2.1 of the License or any later version. QDBM 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 Lesser General Public License for more
* details.
* You should have received a copy of the GNU Lesser General Public License along with QDBM; if
* not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA.
*************************************************************************************************/
#define QDBM_INTERNAL 1
#include "odeum.h"
#include "myconf.h"
#define OD_NAMEMAX 256 /* max size of a database name */
#define OD_DIRMODE 00755 /* permission of a creating directory */
#define OD_PATHBUFSIZ 1024 /* size of a path buffer */
#define OD_NUMBUFSIZ 32 /* size of a buffer for a number */
#define OD_MAPPBNUM 127 /* bucket size of a petit map handle */
#define OD_DOCSNAME "docs" /* name of the database for documents */
#define OD_INDEXNAME "index" /* name of the database for inverted index */
#define OD_RDOCSNAME "rdocs" /* name of the database for reverse dictionary */
#define OD_DOCSBNUM 2039 /* initial bucket number of document database */
#define OD_DOCSDNUM 17 /* division number of document database */
#define OD_DOCSALIGN -4 /* alignment of document database */
#define OD_DOCSFBP 32 /* size of free block pool of document database */
#define OD_INDEXBNUM 32749 /* initial bucket number of inverted index */
#define OD_INDEXDNUM 7 /* division number of inverted index */
#define OD_INDEXALIGN -2 /* alignment of inverted index */
#define OD_INDEXFBP 32 /* size of free block pool of inverted index */
#define OD_RDOCSLRM 81 /* records in a leaf node of reverse dictionary */
#define OD_RDOCSNIM 192 /* records in a non-leaf node of reverse dictionary */
#define OD_RDOCSLCN 128 /* number of leaf cache of reverse dictionary */
#define OD_RDOCSNCN 32 /* number of non-leaf cache of reverse dictionary */
#define OD_CACHEBNUM 262139 /* number of buckets for dirty buffers */
#define OD_CACHESIZ 8388608 /* max bytes to use memory for dirty buffers */
#define OD_CFLIVERAT 0.8 /* ratio of usable cache region */
#define OD_CFBEGSIZ 2048 /* beginning size of flushing frequent words */
#define OD_CFENDSIZ 64 /* lower limit of flushing frequent words */
#define OD_CFRFRAT 0.2 /* ratio of flushing rare words a time */
#define OD_OTCBBUFSIZ 1024 /* size of a buffer for call back functions */
#define OD_OTPERWORDS 10000 /* frequency of call back in merging index */
#define OD_OTPERDOCS 1000 /* frequency of call back in merging docs */
#define OD_MDBRATIO 2.5 /* ratio of bucket number and document number */
#define OD_MIBRATIO 1.5 /* ratio of bucket number and word number */
#define OD_MIARATIO 0.75 /* ratio of alignment to the first words */
#define OD_MIWUNIT 32 /* writing unit of merging inverted index */
#define OD_DMAXEXPR "dmax" /* key of max number of the document ID */
#define OD_DNUMEXPR "dnum" /* key of number of the documents */
#define OD_URIEXPR "1" /* map key of URI */
#define OD_ATTRSEXPR "2" /* map key of attributes */
#define OD_NWORDSEXPR "3" /* map key of normal words */
#define OD_AWORDSEXPR "4" /* map key of as-is words */
#define OD_WTOPRATE 0.1 /* ratio of top words */
#define OD_WTOPBONUS 5000 /* bonus points of top words */
#define OD_KEYCRATIO 1.75 /* ratio of number to max of keyword candidates */
#define OD_WOCCRPOINT 10000 /* points per occurence */
#define OD_SPACECHARS "\t\n\v\f\r " /* space characters */
#define OD_DELIMCHARS "!\"#$%&'()*/<=>?[\\]^`{|}~" /* delimiter characters */
#define OD_GLUECHARS "+,-.:;@" /* glueing characters */
#define OD_MAXWORDLEN 48 /* max length of a word */
typedef struct { /* type of structure for word counting */
const char *word; /* pointer to the word */
int num; /* frequency of the word */
} ODWORD;
enum { /* enumeration for events binded to each character */
OD_EVWORD, /* word */
OD_EVSPACE, /* space */
OD_EVDELIM, /* delimiter */
OD_EVGLUE /* glue */
};
/* private global variables */
int odindexbnum = OD_INDEXBNUM;
int odindexdnum = OD_INDEXDNUM;
int odcachebnum = OD_CACHEBNUM;
int odcachesiz = OD_CACHESIZ;
void (*odotcb)(const char *, ODEUM *, const char *) = NULL;
/* private function prototypes */
static ODEUM *odopendb(const char *name, int omode, int docsbnum, int indexbnum,
const char *fname);
static int odcacheflush(ODEUM *odeum, const char *fname);
static int odcacheflushfreq(ODEUM *odeum, const char *fname, int min);
static int odcacheflushrare(ODEUM *odeum, const char *fname, double ratio);
static int odsortindex(ODEUM *odeum, const char *fname);
static int odsortcompare(const void *a, const void *b);
static int odpurgeindex(ODEUM *odeum, const char *fname);
static CBMAP *odpairsmap(const ODPAIR *pairs, int num);
static int odwordcompare(const void *a, const void *b);
static int odmatchoperator(ODEUM *odeum, CBLIST *tokens);
static ODPAIR *odparsesubexpr(ODEUM *odeum, CBLIST *tokens, CBLIST *nwords, int *np,
CBLIST *errors);
static ODPAIR *odparseexpr(ODEUM *odeum, CBLIST *tokens, CBLIST *nwords, int *np,
CBLIST *errors);
static void odfixtokens(ODEUM *odeum, CBLIST *tokens);
static void odcleannormalized(ODEUM *odeum, CBLIST *nwords);
/*************************************************************************************************
* public objects
*************************************************************************************************/
/* Get a database handle. */
ODEUM *odopen(const char *name, int omode){
assert(name);
return odopendb(name, omode, OD_DOCSBNUM, odindexbnum, "odopen");
}
/* Close a database handle. */
int odclose(ODEUM *odeum){
char numbuf[OD_NUMBUFSIZ];
int err;
assert(odeum);
err = FALSE;
if(odotcb) odotcb("odclose", odeum, "closing the connection");
if(odeum->wmode){
if(odotcb) odotcb("odclose", odeum, "writing meta information");
sprintf(numbuf, "%d", odeum->dmax);
if(!vlput(odeum->rdocsdb, OD_DMAXEXPR, sizeof(OD_DMAXEXPR), numbuf, -1, VL_DOVER)) err = TRUE;
sprintf(numbuf, "%d", odeum->dnum);
if(!vlput(odeum->rdocsdb, OD_DNUMEXPR, sizeof(OD_DNUMEXPR), numbuf, -1, VL_DOVER)) err = TRUE;
if(!odcacheflushfreq(odeum, "odclose", OD_CFENDSIZ)) err = TRUE;
if(!odcacheflushrare(odeum, "odclose", OD_CFRFRAT)) err = TRUE;
if(!odcacheflush(odeum, "odclose")) err = TRUE;
if(!odsortindex(odeum, "odclose")) err = TRUE;
cbmapclose(odeum->cachemap);
cbmapclose(odeum->sortmap);
}
if(!vlclose(odeum->rdocsdb)) err = TRUE;
if(!crclose(odeum->indexdb)) err = TRUE;
if(!crclose(odeum->docsdb)) err = TRUE;
free(odeum->name);
free(odeum);
return err ? FALSE : TRUE;
}
/* Store a document. */
int odput(ODEUM *odeum, ODDOC *doc, int wmax, int over){
char *tmp, *zbuf;
const char *word, *ctmp;
int i, docid, tsiz, wsiz, wnum, tmax, num, zsiz;
double ival;
ODPAIR pair;
CBMAP *map;
CBLIST *tlist;
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
if(!odeum->wmode){
dpecodeset(DP_EMODE, __FILE__, __LINE__);
return FALSE;
}
if((tmp = vlget(odeum->rdocsdb, doc->uri, -1, &tsiz)) != NULL){
if(!over){
free(tmp);
dpecodeset(DP_EKEEP, __FILE__, __LINE__);
return FALSE;
}
if(tsiz != sizeof(int) || !odoutbyid(odeum, *(int *)tmp)){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return FALSE;
}
free(tmp);
}
odeum->dmax++;
odeum->dnum++;
docid = odeum->dmax;
map = cbmapopen();
cbmapput(map, OD_URIEXPR, sizeof(OD_URIEXPR), doc->uri, -1, TRUE);
tmp = cbmapdump(doc->attrs, &tsiz);
cbmapput(map, OD_ATTRSEXPR, sizeof(OD_ATTRSEXPR), tmp, tsiz, TRUE);
free(tmp);
if(wmax < 0 || wmax > cblistnum(doc->nwords)) wmax = cblistnum(doc->nwords);
tlist = cblistopen();
for(i = 0; i < wmax; i++){
ctmp = cblistval(doc->nwords, i, &wsiz);
cblistpush(tlist, ctmp, wsiz);
}
tmp = cblistdump(tlist, &tsiz);
cbmapput(map, OD_NWORDSEXPR, sizeof(OD_NWORDSEXPR), tmp, tsiz, TRUE);
free(tmp);
cblistclose(tlist);
tlist = cblistopen();
for(i = 0; i < wmax; i++){
ctmp = cblistval(doc->awords, i, &wsiz);
if(strcmp(ctmp, cblistval(doc->nwords, i, NULL))){
cblistpush(tlist, ctmp, wsiz);
} else {
cblistpush(tlist, "\0", 1);
}
}
tmp = cblistdump(tlist, &tsiz);
cbmapput(map, OD_AWORDSEXPR, sizeof(OD_AWORDSEXPR), tmp, tsiz, TRUE);
free(tmp);
cblistclose(tlist);
tmp = cbmapdump(map, &tsiz);
cbmapclose(map);
if(_qdbm_deflate){
if(!(zbuf = _qdbm_deflate(tmp, tsiz, &zsiz, _QDBM_ZMRAW))){
free(tmp);
dpecodeset(DP_EMISC, __FILE__, __LINE__);
odeum->fatal = TRUE;
return FALSE;
}
free(tmp);
tmp = zbuf;
tsiz = zsiz;
}
if(!crput(odeum->docsdb, (char *)&docid, sizeof(int), tmp, tsiz, CR_DKEEP)){
free(tmp);
if(dpecode == DP_EKEEP) dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return FALSE;
}
free(tmp);
if(!vlput(odeum->rdocsdb, doc->uri, -1, (char *)&docid, sizeof(int), VL_DOVER)){
odeum->fatal = TRUE;
return FALSE;
}
map = cbmapopen();
wnum = cblistnum(doc->nwords);
tmax = (int)(wnum * OD_WTOPRATE);
for(i = 0; i < wnum; i++){
word = cblistval(doc->nwords, i, &wsiz);
if(wsiz < 1) continue;
if((ctmp = cbmapget(map, word, wsiz, NULL)) != NULL){
num = *(int *)ctmp + OD_WOCCRPOINT;
} else {
num = i <= tmax ? OD_WTOPBONUS + OD_WOCCRPOINT : OD_WOCCRPOINT;
}
cbmapput(map, word, wsiz, (char *)&num, sizeof(int), TRUE);
}
ival = odlogarithm(wnum);
ival = (ival * ival * ival) / 8.0;
if(ival < 8.0) ival = 8.0;
cbmapiterinit(map);
while((word = cbmapiternext(map, &wsiz)) != NULL){
pair.id = docid;
pair.score = (int)(*(int *)cbmapget(map, word, wsiz, NULL) / ival);
cbmapputcat(odeum->cachemap, word, wsiz, (char *)&pair, sizeof(pair));
cbmapmove(odeum->cachemap, word, wsiz, FALSE);
odeum->cacheasiz += sizeof(pair);
cbmapput(odeum->sortmap, word, wsiz, "", 0, FALSE);
}
cbmapclose(map);
if(odeum->cacheasiz > odcachesiz){
for(i = OD_CFBEGSIZ; odeum->cacheasiz > odcachesiz * OD_CFLIVERAT && i >= OD_CFENDSIZ;
i /= 2){
if(!odcacheflushfreq(odeum, "odput", i)) return FALSE;
}
while(odeum->cacheasiz > odcachesiz * OD_CFLIVERAT){
if(!odcacheflushrare(odeum, "odput", OD_CFRFRAT)) return FALSE;
}
}
doc->id = docid;
odeum->ldid = docid;
return TRUE;
}
/* Delete a document by a URL. */
int odout(ODEUM *odeum, const char *uri){
char *tmp;
int tsiz, docid;
assert(odeum && uri);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
if(!odeum->wmode){
dpecodeset(DP_EMODE, __FILE__, __LINE__);
return FALSE;
}
if(!(tmp = vlget(odeum->rdocsdb, uri, -1, &tsiz))){
if(dpecode != DP_ENOITEM) odeum->fatal = TRUE;
return FALSE;
}
if(tsiz != sizeof(int)){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return FALSE;
}
docid = *(int *)tmp;
free(tmp);
return odoutbyid(odeum, docid);
}
/* Delete a document specified by an ID number. */
int odoutbyid(ODEUM *odeum, int id){
char *tmp, *zbuf;
const char *uritmp;
int tsiz, uritsiz, zsiz;
CBMAP *map;
assert(odeum && id > 0);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
if(!odeum->wmode){
dpecodeset(DP_EMODE, __FILE__, __LINE__);
return FALSE;
}
if(!(tmp = crget(odeum->docsdb, (char *)&id, sizeof(int), 0, -1, &tsiz))){
if(dpecode != DP_ENOITEM) odeum->fatal = TRUE;
return FALSE;
}
if(_qdbm_inflate){
if(!(zbuf = _qdbm_inflate(tmp, tsiz, &zsiz, _QDBM_ZMRAW))){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return FALSE;
}
free(tmp);
tmp = zbuf;
tsiz = zsiz;
}
map = cbmapload(tmp, tsiz);
free(tmp);
uritmp = cbmapget(map, OD_URIEXPR, sizeof(OD_URIEXPR), &uritsiz);
if(!uritmp || !vlout(odeum->rdocsdb, uritmp, uritsiz)){
cbmapclose(map);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return FALSE;
}
cbmapclose(map);
if(!crout(odeum->docsdb, (char *)&id, sizeof(int))){
odeum->fatal = TRUE;
return FALSE;
}
odeum->dnum--;
return TRUE;
}
/* Retrieve a document by a URI. */
ODDOC *odget(ODEUM *odeum, const char *uri){
char *tmp;
int tsiz, docid;
assert(odeum && uri);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return NULL;
}
if(!(tmp = vlget(odeum->rdocsdb, uri, -1, &tsiz))){
if(dpecode != DP_ENOITEM) odeum->fatal = TRUE;
return NULL;
}
if(tsiz != sizeof(int)){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return NULL;
}
docid = *(int *)tmp;
free(tmp);
return odgetbyid(odeum, docid);
}
/* Retrieve a document by an ID number. */
ODDOC *odgetbyid(ODEUM *odeum, int id){
char *tmp, *zbuf;
const char *uritmp, *attrstmp, *nwordstmp, *awordstmp, *asis, *normal;
int i, tsiz, uritsiz, attrstsiz, nwordstsiz, awordstsiz, zsiz, asiz, nsiz;
ODDOC *doc;
CBMAP *map;
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return NULL;
}
if(id < 1){
dpecodeset(DP_ENOITEM, __FILE__, __LINE__);
return NULL;
}
if(!(tmp = crget(odeum->docsdb, (char *)&id, sizeof(int), 0, -1, &tsiz))){
if(dpecode != DP_ENOITEM) odeum->fatal = TRUE;
return NULL;
}
if(_qdbm_inflate){
if(!(zbuf = _qdbm_inflate(tmp, tsiz, &zsiz, _QDBM_ZMRAW))){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return NULL;
}
free(tmp);
tmp = zbuf;
tsiz = zsiz;
}
map = cbmapload(tmp, tsiz);
free(tmp);
uritmp = cbmapget(map, OD_URIEXPR, sizeof(OD_URIEXPR), &uritsiz);
attrstmp = cbmapget(map, OD_ATTRSEXPR, sizeof(OD_ATTRSEXPR), &attrstsiz);
nwordstmp = cbmapget(map, OD_NWORDSEXPR, sizeof(OD_NWORDSEXPR), &nwordstsiz);
awordstmp = cbmapget(map, OD_AWORDSEXPR, sizeof(OD_AWORDSEXPR), &awordstsiz);
if(!uritmp || !attrstmp || !nwordstmp || !awordstmp){
cbmapclose(map);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return NULL;
}
doc = cbmalloc(sizeof(ODDOC));
doc->id = id;
doc->uri = cbmemdup(uritmp, uritsiz);
doc->attrs = cbmapload(attrstmp, attrstsiz);
doc->nwords = cblistload(nwordstmp, nwordstsiz);
doc->awords = cblistload(awordstmp, awordstsiz);
cbmapclose(map);
for(i = 0; i < cblistnum(doc->awords); i++){
asis = cblistval(doc->awords, i, &asiz);
if(asiz == 1 && asis[0] == '\0'){
normal = cblistval(doc->nwords, i, &nsiz);
cblistover(doc->awords, i, normal, nsiz);
}
}
return doc;
}
/* Retrieve the ID of the document specified by a URI. */
int odgetidbyuri(ODEUM *odeum, const char *uri){
char *tmp;
int tsiz, docid;
assert(odeum && uri);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
if(!(tmp = vlget(odeum->rdocsdb, uri, -1, &tsiz))){
if(dpecode != DP_ENOITEM) odeum->fatal = TRUE;
return -1;
}
if(tsiz != sizeof(int)){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return -1;
}
docid = *(int *)tmp;
free(tmp);
return docid;
}
/* Check whether the document specified by an ID number exists. */
int odcheck(ODEUM *odeum, int id){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
if(id < 1){
dpecodeset(DP_ENOITEM, __FILE__, __LINE__);
return FALSE;
}
return crvsiz(odeum->docsdb, (char *)&id, sizeof(int)) != -1;
}
/* Search the inverted index for documents including a word. */
ODPAIR *odsearch(ODEUM *odeum, const char *word, int max, int *np){
char *tmp;
int tsiz;
assert(odeum && word && np);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return NULL;
}
if(odeum->wmode && cbmaprnum(odeum->sortmap) > 0 &&
(!odcacheflush(odeum, "odsearch") || !odsortindex(odeum, "odsearch"))){
odeum->fatal = TRUE;
return NULL;
}
max = max < 0 ? -1 : max * sizeof(ODPAIR);
if(!(tmp = crget(odeum->indexdb, word, -1, 0, max, &tsiz))){
if(dpecode != DP_ENOITEM){
odeum->fatal = TRUE;
return NULL;
}
*np = 0;
return cbmalloc(1);
}
*np = tsiz / sizeof(ODPAIR);
return (ODPAIR *)tmp;
}
/* Get the number of documents including a word. */
int odsearchdnum(ODEUM *odeum, const char *word){
int rv;
assert(odeum && word);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
rv = crvsiz(odeum->indexdb, word, -1);
return rv < 0 ? -1 : rv / sizeof(ODPAIR);
}
/* Initialize the iterator of a database handle. */
int oditerinit(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
return criterinit(odeum->docsdb);
}
/* Get the next key of the iterator. */
ODDOC *oditernext(ODEUM *odeum){
char *tmp;
int tsiz, docsid;
ODDOC *doc;
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return NULL;
}
doc = NULL;
while(TRUE){
if(!(tmp = criternext(odeum->docsdb, &tsiz))){
if(dpecode != DP_ENOITEM) odeum->fatal = TRUE;
return NULL;
}
if(tsiz != sizeof(int)){
free(tmp);
dpecodeset(DP_EBROKEN, __FILE__, __LINE__);
odeum->fatal = TRUE;
return NULL;
}
docsid = *(int *)tmp;
free(tmp);
if((doc = odgetbyid(odeum, docsid)) != NULL) break;
if(dpecode != DP_ENOITEM){
odeum->fatal = TRUE;
return NULL;
}
}
return doc;
}
/* Synchronize updating contents with the files and the devices. */
int odsync(ODEUM *odeum){
char numbuf[OD_NUMBUFSIZ];
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
if(!odeum->wmode){
dpecodeset(DP_EMODE, __FILE__, __LINE__);
return FALSE;
}
if(odotcb) odotcb("odsync", odeum, "writing meta information");
sprintf(numbuf, "%d", odeum->dmax);
if(!vlput(odeum->rdocsdb, OD_DMAXEXPR, sizeof(OD_DMAXEXPR), numbuf, -1, VL_DOVER)){
odeum->fatal = TRUE;
return FALSE;
}
sprintf(numbuf, "%d", odeum->dnum);
if(!vlput(odeum->rdocsdb, OD_DNUMEXPR, sizeof(OD_DNUMEXPR), numbuf, -1, VL_DOVER)){
odeum->fatal = TRUE;
return FALSE;
}
if(!odcacheflush(odeum, "odsync")){
odeum->fatal = TRUE;
return FALSE;
}
if(!odsortindex(odeum, "odsync")){
odeum->fatal = TRUE;
return FALSE;
}
if(odotcb) odotcb("odsync", odeum, "synchronizing the document database");
if(!crsync(odeum->docsdb)){
odeum->fatal = TRUE;
return FALSE;
}
if(odotcb) odotcb("odsync", odeum, "synchronizing the inverted index");
if(!crsync(odeum->indexdb)){
odeum->fatal = TRUE;
return FALSE;
}
if(odotcb) odotcb("odsync", odeum, "synchronizing the reverse dictionary");
if(!vlsync(odeum->rdocsdb)){
odeum->fatal = TRUE;
return FALSE;
}
return TRUE;
}
/* Optimize a database. */
int odoptimize(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return FALSE;
}
if(!odeum->wmode){
dpecodeset(DP_EMODE, __FILE__, __LINE__);
return FALSE;
}
if(!odcacheflush(odeum, "odoptimize")){
odeum->fatal = TRUE;
return FALSE;
}
if(odeum->ldid < 1 || odeum->ldid != odeum->dnum){
if(!odpurgeindex(odeum, "odoptimize")){
odeum->fatal = TRUE;
return FALSE;
}
}
if(odeum->ldid > 0){
if(!odsortindex(odeum, "odoptimize")){
odeum->fatal = TRUE;
return FALSE;
}
}
if(odotcb) odotcb("odoptimize", odeum, "optimizing the document database");
if(!croptimize(odeum->docsdb, -1)){
odeum->fatal = TRUE;
return FALSE;
}
if(odotcb) odotcb("odoptimize", odeum, "optimizing the inverted index");
if(!croptimize(odeum->indexdb, -1)){
odeum->fatal = TRUE;
return FALSE;
}
if(odotcb) odotcb("odoptimize", odeum, "optimizing the reverse dictionary");
if(!vloptimize(odeum->rdocsdb)){
odeum->fatal = TRUE;
return FALSE;
}
return TRUE;
}
/* Get the name of a database. */
char *odname(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return NULL;
}
return cbmemdup(odeum->name, -1);
}
/* Get the total size of database files. */
double odfsiz(ODEUM *odeum){
double fsiz, rv;
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
fsiz = 0;
if((rv = crfsizd(odeum->docsdb)) < 0) return -1.0;
fsiz += rv;
if((rv = crfsizd(odeum->indexdb)) < 0) return -1.0;
fsiz += rv;
if((rv = vlfsiz(odeum->rdocsdb)) == -1) return -1.0;
fsiz += rv;
return fsiz;
}
/* Get the total number of the elements of the bucket arrays for the inverted index. */
int odbnum(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
return crbnum(odeum->indexdb);
}
/* Get the total number of the used elements of the bucket arrays in the inverted index. */
int odbusenum(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
return crbusenum(odeum->indexdb);
}
/* Get the number of the documents stored in a database. */
int oddnum(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
return odeum->dnum;
}
/* Get the number of the words stored in a database. */
int odwnum(ODEUM *odeum){
assert(odeum);
if(odeum->fatal){
dpecodeset(DP_EFATAL, __FILE__, __LINE__);
return -1;
}
return crrnum(odeum->indexdb);
}
/* Check whether a database handle is a writer or not. */
int odwritable(ODEUM *odeum){
assert(odeum);
return odeum->wmode;
}
/* Check whether a database has a fatal error or not. */
int odfatalerror(ODEUM *odeum){
assert(odeum);
return odeum->fatal;
}
/* Get the inode number of a database directory. */
int odinode(ODEUM *odeum){
assert(odeum);
return odeum->inode;
}
/* Get the last modified time of a database. */
time_t odmtime(ODEUM *odeum){
assert(odeum);
return crmtime(odeum->indexdb);
}
/* Merge plural database directories. */
int odmerge(const char *name, const CBLIST *elemnames){
ODEUM *odeum, **elems;
CURIA *curia, *ecuria;
VILLA *villa, *evilla;
ODPAIR *pairs;
char *word, *kbuf, *vbuf, *dbuf, otmsg[OD_OTCBBUFSIZ];
char *wpunit[OD_MIWUNIT], *vpunit[OD_MIWUNIT];
int i, j, k, num, dnum, wnum, dbnum, ibnum, tnum, wsunit[OD_MIWUNIT], vsunit[OD_MIWUNIT];
int err, *bases, sum, max, wsiz, ksiz, vsiz, uend, unum, pnum, align, id, nid, dsiz;
assert(name && elemnames);
num = cblistnum(elemnames);
elems = cbmalloc(num * sizeof(ODEUM *) + 1);
dnum = 0;
wnum = 0;
for(i = 0; i < num; i++){
if(!(elems[i] = odopen(cblistval(elemnames, i, NULL), OD_OREADER))){
for(i -= 1; i >= 0; i--){
odclose(elems[i]);
}
free(elems);
return FALSE;
}
dnum += oddnum(elems[i]);
wnum += odwnum(elems[i]);
}
dbnum = (int)(dnum * OD_MDBRATIO / OD_DOCSDNUM);
ibnum = (int)(wnum * OD_MIBRATIO / odindexdnum);
if(!(odeum = odopendb(name, OD_OWRITER | OD_OCREAT | OD_OTRUNC, dbnum, ibnum, "odmerge"))){
for(i = 0; i < num; i++){
odclose(elems[i]);
}
free(elems);
return FALSE;
}
err = FALSE;
if(odotcb) odotcb("odmerge", odeum, "calculating the base ID numbers");
bases = cbmalloc(num * sizeof(int) + 1);
sum = 0;
for(i = 0; i < num; i++){
ecuria = elems[i]->docsdb;
max = 0;
if(!criterinit(ecuria) && dpecode != DP_ENOITEM) err = TRUE;
while((kbuf = criternext(ecuria, &ksiz)) != NULL){
if(ksiz == sizeof(int)){
if(*(int *)kbuf > max) max = *(int *)kbuf;
}
free(kbuf);
}
bases[i] = sum;
sum += max;
}
curia = odeum->indexdb;
for(i = 0; i < num; i++){
if(odotcb){
sprintf(otmsg, "merging the inverted index (%d/%d)", i + 1, num);
odotcb("odmerge", odeum, otmsg);
}
ecuria = elems[i]->indexdb;
tnum = 0;
uend = FALSE;
if(!criterinit(ecuria) && dpecode != DP_ENOITEM) err = TRUE;
while(!uend){
for(unum = 0; unum < OD_MIWUNIT; unum++){
if(!(word = criternext(ecuria, &wsiz))){
uend = TRUE;
break;
}
if(!(vbuf = crget(ecuria, word, wsiz, 0, -1, &vsiz))){
err = TRUE;
free(word);
break;
}
wpunit[unum] = word;
wsunit[unum] = wsiz;
vpunit[unum] = vbuf;
vsunit[unum] = vsiz;
}
for(j = 0; j < unum; j++){
word = wpunit[j];
wsiz = wsunit[j];
vbuf = vpunit[j];
vsiz = vsunit[j];
pairs = (ODPAIR *)vbuf;
pnum = vsiz / sizeof(ODPAIR);
for(k = 0; k < pnum; k++){
pairs[k].id += bases[i];
}
align = (int)(i < num - 1 ? vsiz * (num - i) * OD_MIARATIO : OD_INDEXALIGN);
if(!crsetalign(curia, align)) err = TRUE;
if(!crput(curia, word, wsiz, vbuf, vsiz, CR_DCAT)) err = TRUE;
free(vbuf);
free(word);
if(odotcb && (tnum + 1) % OD_OTPERWORDS == 0){
sprintf(otmsg, "... (%d/%d)", tnum + 1, crrnum(ecuria));
odotcb("odmerge", odeum, otmsg);
}
tnum++;
}
}
}
if(odotcb) odotcb("odmerge", odeum, "sorting the inverted index");
tnum = 0;
if(!criterinit(curia) && dpecode != DP_ENOITEM) err = TRUE;
while((word = criternext(curia, &wsiz)) != NULL){
if((vbuf = crget(curia, word, wsiz, 0, -1, &vsiz)) != NULL){
if(vsiz > sizeof(ODPAIR)){
pairs = (ODPAIR *)vbuf;
pnum = vsiz / sizeof(ODPAIR);
qsort(pairs, pnum, sizeof(ODPAIR), odsortcompare);
if(!crput(curia, word, wsiz, vbuf, vsiz, CR_DOVER)) err = TRUE;
}
free(vbuf);
}
free(word);
if(odotcb && (tnum + 1) % OD_OTPERWORDS == 0){
sprintf(otmsg, "... (%d/%d)", tnum + 1, crrnum(curia));
odotcb("odmerge", odeum, otmsg);
}
tnum++;
}
if(odotcb) odotcb("odmerge", odeum, "synchronizing the inverted index");
if(!crsync(curia)) err = TRUE;
dnum = 0;
curia = odeum->docsdb;
villa = odeum->rdocsdb;
for(i = 0; i < num; i++){
if(odotcb){
sprintf(otmsg, "merging the document database (%d/%d)", i + 1, num);
odotcb("odmerge", odeum, otmsg);
}
evilla = elems[i]->rdocsdb;
ecuria = elems[i]->docsdb;
tnum = 0;
if(!vlcurfirst(evilla) && dpecode != DP_ENOITEM) err = TRUE;
while(TRUE){
if(!(kbuf = vlcurkey(evilla, &ksiz))) break;
if((ksiz == sizeof(OD_DMAXEXPR) && !memcmp(kbuf, OD_DMAXEXPR, ksiz)) ||
(ksiz == sizeof(OD_DNUMEXPR) && !memcmp(kbuf, OD_DNUMEXPR, ksiz))){
free(kbuf);
if(!vlcurnext(evilla)) break;
continue;
}
if(!(vbuf = vlcurval(evilla, &vsiz))){
free(kbuf);
if(!vlcurnext(evilla)) break;
continue;
}
if(vsiz != sizeof(int)){
free(vbuf);
free(kbuf);
if(!vlcurnext(evilla)) break;
continue;
}
id = *(int *)vbuf;
nid = id + bases[i];
if(vlput(villa, kbuf, ksiz, (char *)&nid, sizeof(int), VL_DKEEP)){
if((dbuf = crget(ecuria, (char *)&id, sizeof(int), 0, -1, &dsiz)) != NULL){
if(crput(curia, (char *)&nid, sizeof(int), dbuf, dsiz, CR_DKEEP)){
dnum++;
} else {
err = TRUE;
}
free(dbuf);
} else {
err = TRUE;
}
} else if(dpecode != DP_EKEEP){
err = TRUE;
}
free(vbuf);
free(kbuf);
odeum->dnum++;
if(odotcb && (tnum + 1) % OD_OTPERDOCS == 0){
sprintf(otmsg, "... (%d/%d)", tnum + 1, crrnum(ecuria));
odotcb("odmerge", odeum, otmsg);
}
tnum++;
if(!vlcurnext(evilla)) break;
}
}
odeum->dnum = dnum;
odeum->dmax = dnum;
free(bases);
if(odotcb) odotcb("odmerge", odeum, "synchronizing the document index");
if(!crsync(curia)) err = TRUE;
if(!odclose(odeum)) err = TRUE;
for(i = 0; i < num; i++){
if(!odclose(elems[i])) err = TRUE;
}
free(elems);
return err ? FALSE : TRUE;
}
/* Remove a database directory. */
int odremove(const char *name){
char docsname[OD_PATHBUFSIZ], indexname[OD_PATHBUFSIZ], rdocsname[OD_PATHBUFSIZ];
char path[OD_PATHBUFSIZ];
const char *file;
struct stat sbuf;
CBLIST *list;
int i;
assert(name);
sprintf(docsname, "%s%c%s", name, MYPATHCHR, OD_DOCSNAME);
sprintf(indexname, "%s%c%s", name, MYPATHCHR, OD_INDEXNAME);
sprintf(rdocsname, "%s%c%s", name, MYPATHCHR, OD_RDOCSNAME);
if(lstat(name, &sbuf) == -1){
dpecodeset(DP_ESTAT, __FILE__, __LINE__);
return FALSE;
}
if(lstat(docsname, &sbuf) != -1 && !crremove(docsname)) return FALSE;
if(lstat(indexname, &sbuf) != -1 && !crremove(indexname)) return FALSE;
if(lstat(rdocsname, &sbuf) != -1 && !vlremove(rdocsname)) return FALSE;
if((list = cbdirlist(name)) != NULL){
for(i = 0; i < cblistnum(list); i++){
file = cblistval(list, i, NULL);
if(!strcmp(file, MYCDIRSTR) || !strcmp(file, MYPDIRSTR)) continue;
sprintf(path, "%s%c%s", name, MYPATHCHR, file);
if(lstat(path, &sbuf) == -1) continue;
if(S_ISDIR(sbuf.st_mode)){
if(!crremove(path)) return FALSE;
} else {
if(!dpremove(path)) return FALSE;
}
}
cblistclose(list);
}
if(rmdir(name) == -1){
dpecodeset(DP_ERMDIR, __FILE__, __LINE__);
return FALSE;
}