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fts-backend-xapian-functions.cpp
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fts-backend-xapian-functions.cpp
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/* Copyright (c) 2019 Joan Moreau <jom@grosjo.net>, see the included COPYING file */
class XResultSet
{
public:
long size;
Xapian::docid * data;
XResultSet() { size=0; data=NULL; }
~XResultSet() { if (size>0) { i_free(data); } }
void add(Xapian::docid did)
{
if(data==NULL)
{
data=(Xapian::docid *)i_malloc(sizeof(Xapian::docid));
}
else
{
data=(Xapian::docid *)i_realloc(data,size*sizeof(Xapian::docid),(size+1)*sizeof(Xapian::docid));
}
data[size]=did;
size++;
}
};
class XQuerySet
{
private:
icu::Transliterator *accentsConverter;
public:
char * header;
char * text;
XQuerySet ** qs;
bool global_and; // global
bool global_neg; // global
bool item_neg; // for the term
long qsize;
long limit;
XQuerySet()
{
qsize=0; qs=NULL;
limit=1;
global_and=true;
header=NULL;
text=NULL;
global_neg=false;
accentsConverter=NULL;
}
XQuerySet(bool is_and, bool is_neg, long l)
{
qsize=0; qs=NULL;
limit=1;
if(l>1) { limit=l; }
header=NULL;
text=NULL;
global_and=is_and;
global_neg=is_neg;
accentsConverter=NULL;
}
~XQuerySet()
{
if(text!=NULL) { i_free(text); text=NULL; }
if(header!=NULL) { i_free(header); header=NULL; }
for(long j=0;j<qsize;j++)
{
delete(qs[j]);
}
if(qsize>0) i_free(qs);
qsize=0; qs=NULL;
if(accentsConverter != NULL) delete(accentsConverter);
}
void add(const char * h,const char * t)
{
add(h,t,false);
}
void add(const char * h,const char * t, bool is_neg)
{
if(h==NULL) return;
if(t==NULL) return;
icu::UnicodeString h2 = icu::UnicodeString::fromUTF8(icu::StringPiece(h));
icu::UnicodeString t2 = icu::UnicodeString::fromUTF8(icu::StringPiece(t));
add(&h2,&t2,is_neg);
}
void add(icu::UnicodeString *h, icu::UnicodeString *t, bool is_neg)
{
std::string st1,st2;
if(fts_xapian_settings.verbose>2) { st1.clear(); t->toUTF8String(st1); }
long i,j,k;
XQuerySet * q2;
icu::UnicodeString *r1,*r2;
t->findAndReplace("'"," ");
t->findAndReplace("\""," ");
t->findAndReplace("\n"," ");
t->findAndReplace("\r"," ");
t->findAndReplace("\t"," ");
h->trim();
t->trim();
h->toLower();
t->toLower();
if(h->length()<1) return;
if(t->length()<limit) return;
k=CHARS_NB;
while(k>0)
{
t->findAndReplace(chars_pb[k-1],"_");
k--;
}
if(fts_xapian_settings.verbose>2)
{
st2.clear();
t->toUTF8String(st2);
i_info("FTS Xapian: XQuerySet->add(%s) -> %s",st1.c_str(),st2.c_str());
}
i = t->lastIndexOf(" ");
if(i>0)
{
q2 = new XQuerySet(true,false,limit);
while(i>0)
{
j = t->length();
r1 = new icu::UnicodeString(*t,i+1,j-i-1);
q2->add(h,r1,false);
delete(r1);
t->truncate(i);
t->trim();
i = t->lastIndexOf(" ");
}
q2->add(h,t,false);
if(q2->count()>0) add(q2); else delete(q2);
return;
}
st1.clear();
h->toUTF8String(st1);
char * h2 = i_strdup(st1.c_str());
if(accentsConverter == NULL)
{
UErrorCode status = U_ZERO_ERROR;
accentsConverter = icu::Transliterator::createInstance("NFD; [:M:] Remove; NFC", UTRANS_FORWARD, status);
if(U_FAILURE(status))
{
i_error("FTS Xapian: Can not allocate ICU translator (2)");
accentsConverter = NULL;
}
}
if(accentsConverter != NULL) accentsConverter->transliterate(*t);
st2.clear();
t->toUTF8String(st2);
char * t2 = i_strdup(st2.c_str());
if(strcmp(h2,XAPIAN_WILDCARD)==0)
{
q2 = new XQuerySet(false,is_neg,limit);
for(i=1;i<HDRS_NB;i++)
{
if(i!=XAPIAN_EXPUNGE_HEADER) q2->add(hdrs_emails[i],t2,is_neg);
}
add(q2);
i_free(h2);
i_free(t2);
return;
}
i=0;
while((i<HDRS_NB) && (strcmp(h2,hdrs_emails[i])!=0))
{
i++;
}
if(i>=HDRS_NB)
{
if(fts_xapian_settings.verbose>1) i_error("FTS Xapian: Unknown header (lookup) '%s'",h2);
i_free(h2); i_free(t2);
return;
}
if(has(h2,t2))
{
i_free(h2);
i_free(t2);
return;
}
if(text==NULL)
{
text=t2;
header=h2;
item_neg=is_neg;
return;
}
q2 = new XQuerySet(global_and,is_neg,limit);
q2->add(h,t,false);
add(q2);
}
void add(XQuerySet *q2)
{
if(fts_xapian_settings.verbose>2) i_info("FTS Xapian: XQuerySet->addQ()");
if(qsize<1)
{
qs=(XQuerySet **)i_malloc(sizeof(XQuerySet*));
}
else
{
qs=(XQuerySet **)i_realloc(qs,qsize*sizeof(XQuerySet*),(qsize+1)*sizeof(XQuerySet*));
}
qs[qsize]=q2;
qsize++;
}
bool has(const char *h, const char *t)
{
if(fts_xapian_settings.verbose>2) i_info("FTS Xapian: XQuerySet->has(%s,%s)",h,t);
if((text!=NULL) && (strcmp(h,header)==0) && (strcmp(t,text)==0)) return true;
for(long i=0; i<qsize; i++)
{
if(qs[i]->has(h,t)) return true;
}
return false;
}
int count()
{
int c=0;
if(text!=NULL) c=1;
c+=qsize;
return c;
}
std::string get_string()
{
std::string s;
if(count()<1) return s;
if(text!=NULL)
{
if(item_neg) s.append("NOT( ");
s.append(header);
//s.append(":");
s.append(":\"");
s.append(text);
s.append("\"");
if(item_neg) s.append(" )");
}
const char * op=" OR ";
if(global_and) op=" AND ";
for (int i=0;i<qsize;i++)
{
int c=qs[i]->count();
if(c<1) continue;
if(s.length()>0) s.append(op);
if(qs[i]->global_neg)
{
s.append("NOT(");
s.append(qs[i]->get_string());
s.append(")");
}
else if(c>1)
{
s.append("(");
s.append(qs[i]->get_string());
s.append(")");
}
else s.append(qs[i]->get_string());
}
if(global_neg)
{
s="NOT("+s+")";
}
return s;
}
Xapian::Query * get_query(Xapian::Database * db)
{
if(count()<1)
{
return new Xapian::Query(Xapian::Query::MatchNothing);
}
Xapian::QueryParser * qp = new Xapian::QueryParser();
for(int i=0; i< HDRS_NB; i++) qp->add_prefix(hdrs_emails[i], hdrs_xapian[i]);
char *s = i_strdup(get_string().c_str());
qp->set_database(*db);
Xapian::Query * q = new Xapian::Query(qp->parse_query(s,Xapian::QueryParser::FLAG_DEFAULT));// | Xapian::QueryParser::FLAG_PARTIAL));
i_free(s);
delete(qp);
return q;
}
};
class XNGram
{
private:
long hardlimit;
const char * prefix;
bool onlyone;
icu::Transliterator *accentsConverter;
public:
char ** data;
long size,maxlength;
long memory;
XNGram(const char * pre)
{
size=0;
memory=0;
maxlength=0;
data=NULL;
prefix=pre;
hardlimit=XAPIAN_TERM_SIZELIMIT-strlen(prefix);
onlyone=false;
if(strcmp(prefix,"XMID")==0) onlyone=true;
accentsConverter = NULL;
}
~XNGram()
{
long i;
if (data != NULL)
{
for(i=0;i<size;i++)
{
i_free(data[i]);
}
i_free(data);
}
data=NULL;
if(accentsConverter != NULL) delete(accentsConverter);
}
void add(const char * s)
{
if(s==NULL) return;
icu::UnicodeString d = icu::UnicodeString::fromUTF8(icu::StringPiece(s));
add(&d);
}
void add(icu::UnicodeString *d)
{
if(fts_xapian_settings.verbose>2) i_info("FTS Xapian: XNGram->add()");
d->toLower();
d->findAndReplace("'"," ");
d->findAndReplace("\""," ");
d->findAndReplace("\n"," ");
d->findAndReplace("\r"," ");
d->findAndReplace("\t"," ");
long i,k;
icu::UnicodeString *r1,*r2;
d->trim();
i = d->lastIndexOf(" ");
if(i>0)
{
r1 = new icu::UnicodeString(*d,0,i);
r2 = new icu::UnicodeString(*d,i+1,d->length()-i-1);
add(r1);
add(r2);
delete(r1);
delete(r2);
return;
}
k=CHARS_NB;
while(k>0)
{
d->findAndReplace(chars_pb[k-1],"_");
k--;
}
if(accentsConverter == NULL)
{
UErrorCode status = U_ZERO_ERROR;
accentsConverter = icu::Transliterator::createInstance("NFD; [:M:] Remove; NFC", UTRANS_FORWARD, status);
if(U_FAILURE(status))
{
i_error("FTS Xapian: Can not allocate ICU translator (1)");
accentsConverter = NULL;
}
}
if(accentsConverter != NULL) accentsConverter->transliterate(*d);
k = d->length();
if(k<fts_xapian_settings.partial) return;
if(onlyone)
{
add_stem(d);
return;
}
i = d->lastIndexOf("_");
if(i>=0)
{
r1 = new icu::UnicodeString(*d,0,i);
r2 = new icu::UnicodeString(*d,i+1,d->length()-i-1);
add(r1);
add(r2);
delete(r1);
delete(r2);
add_stem(d);
return;
}
for(i=0;i<=k-fts_xapian_settings.partial;i++)
{
for(long j=fts_xapian_settings.partial;(j+i<=k)&&(j<=fts_xapian_settings.full);j++)
{
r1 = new icu::UnicodeString(*d,i,j);
add_stem(r1);
delete(r1);
}
}
if(k>fts_xapian_settings.full) add_stem(d);
}
void add_stem(icu::UnicodeString *d)
{
d->trim();
long l=d->length();
if(l<fts_xapian_settings.partial) return;
std::string s;
d->toUTF8String(s);
l = s.length();
if(l>hardlimit)
{
if(fts_xapian_settings.verbose>0) i_warning("FTS Xapian: Term too long to be indexed (%s ...)",s.substr(0,100).c_str());
return;
}
if(fts_xapian_settings.verbose>2) i_info("FTS Xapian: XNGram->add_stem(%s)",s.substr(0,100).c_str());
char * s2 = i_strdup(s.c_str());
long p =0;
if(size<1)
{
data=(char **)i_malloc(sizeof(char*));
size=0;
p=0;
}
else
{
p=0;
while((p<size) && (strcmp(data[p],s2)<0))
{
p++;
}
if((p<size) && (strcmp(data[p],s2)==0))
{
i_free(s2);
return;
}
data=(char **)i_realloc(data,size*sizeof(char*),(size+1)*sizeof(char*));
long i=size;
while(i>p)
{
data[i]=data[i-1];
i--;
}
}
if(l>maxlength) { maxlength=l; }
data[p]=s2;
size++;
memory = memory + ((l+1) * sizeof(data[p][0]));
}
};
static long fts_backend_xapian_current_time()
{
struct timeval tp;
gettimeofday(&tp, NULL);
return tp.tv_sec * 1000 + tp.tv_usec / 1000;
}
static long fts_backend_xapian_get_free_memory() // KB
{
/*
struct rlimit rl;
#if !defined(__OpenBSD__)
getrlimit(RLIMIT_AS,&rl);
long limit = rl.rlim_cur / 1024.0;
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: RLIM AS =%ld",limit);
#else
long limit = 0;
#endif
getrlimit(RLIMIT_DATA,&rl);
long l2 = rl.rlim_cur / 1024.0;
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: RLIM DATA =%ld",l2);
if((l2>0) && ((limit>l2) || (limit<1))) limit=l2;
*/
long m=0;
char buffer[500];
FILE *f=fopen("/proc/meminfo","r");
while(!feof(f))
{
if ( fgets (buffer , 100 , f) == NULL ) break;
const char *p = strstr(buffer,"MemFree");
if(p!=NULL)
{
m+=atol(p+8);
}
p = strstr(buffer,"Cached");
if(p==buffer)
{
m+=atol(p+6);
}
}
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: Free memory %ld MB",long(m/1024.0));
fclose (f);
return m;
/*
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__APPLE__)
uint32_t m;
size_t len = sizeof(m);
sysctlbyname("vm.stats.vm.v_free_count", &m, &len, NULL, 0);
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: (BSD) Free pages %ld",long(m));
m = m * fts_xapian_settings.pagesize / 1024.0;
if((limit>0) && (m>limit)) m = limit;
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: (BSD) Free memory %ld MB",long(m/1024.0));
return long(m);
#else
long m = long(sysconf(_SC_AVPHYS_PAGES) * fts_xapian_settings.pagesize / 1024.0);
if((limit>0) && (m>limit)) m = limit;
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: Free memory %ld MB",long(m/1024.0));
return m;
#endif
*/
}
static bool fts_backend_xapian_test_memory()
{
long fri = fts_backend_xapian_get_free_memory(); // KB
if(fts_xapian_settings.verbose>1) i_warning("FTS Xapian: Free memory %ld MB vs %ld MB minimum",long(fri/1024.0),fts_xapian_settings.lowmemory);
return(fri > ( fts_xapian_settings.lowmemory * 1024 ) );
}
static bool fts_backend_xapian_open_readonly(struct xapian_fts_backend *backend, Xapian::Database ** dbr)
{
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: fts_backend_xapian_open_readonly");
if((backend->db == NULL) || (strlen(backend->db)<1))
{
if(fts_xapian_settings.verbose>0) i_warning("FTS Xapian: Open DB Read Only : no DB name");
return false;
}
try
{
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: Opening DB (RO) %s",backend->db);
*dbr = new Xapian::Database(backend->db,Xapian::DB_OPEN | Xapian::DB_NO_SYNC);
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: Can not open RO index (%s) %s : %s - %s",backend->boxname,backend->db,e.get_type(),e.get_error_string());
return false;
}
return true;
}
static bool fts_backend_xapian_check_access(struct xapian_fts_backend *backend)
{
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: fts_backend_xapian_check_access");
if((backend->db == NULL) || (strlen(backend->db)<1))
{
if(fts_xapian_settings.verbose>0) i_warning("FTS Xapian: check_write : no DB name");
return false;
}
if(backend->dbw != NULL) return true;
try
{
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Opening DB (RW) %s",backend->db);
backend->dbw = new Xapian::WritableDatabase(backend->db,Xapian::DB_CREATE_OR_OPEN | Xapian::DB_RETRY_LOCK | Xapian::DB_BACKEND_GLASS | Xapian::DB_NO_SYNC);
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: Can't open Xapian DB (RW) (%s) %s : %s - %s",backend->boxname,backend->db,e.get_type(),e.get_error_string());
return false;
}
backend->nbdocs=backend->dbw->get_doccount();
if(fts_xapian_settings.verbose>0)
{
i_info("FTS Xapian: Opening DB (RW) %s (%ld docs stored): Done",backend->db,backend->nbdocs);
}
return true;
}
static void fts_backend_xapian_oldbox(struct xapian_fts_backend *backend)
{
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: fts_backend_xapian_oldbox");
if(backend->old_guid != NULL)
{
/* Performance calculator*/
long dt = fts_backend_xapian_current_time() - backend->perf_dt;
double r=0;
if(dt>0)
{
r=backend->perf_nb*1000.0;
r=r/dt;
}
/* End Performance calculator*/
i_info("FTS Xapian: Done indexing '%s' (%s) (%ld msgs in %ld ms, rate: %.1f)",backend->old_boxname, backend->old_guid,backend->perf_nb,dt,r);
i_free(backend->old_guid); backend->old_guid = NULL;
i_free(backend->old_boxname); backend->old_boxname = NULL;
}
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: fts_backend_xapian_oldbox - done");
}
static void fts_backend_xapian_release(struct xapian_fts_backend *backend, const char * reason, long commit_time)
{
bool err=false;
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: fts_backend_xapian_release (%s)",reason);
if(commit_time<1) commit_time = fts_backend_xapian_current_time();
long n = 0;
if(backend->dbw !=NULL)
{
if(fts_xapian_settings.verbose>0) n = backend->dbw->get_doccount();
try
{
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Commit & Close : %ld (old) vs %ld (new)",backend->nbdocs,n);
backend->dbw->commit();
backend->dbw->close();
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: %s : %s - %s",reason,e.get_type(),e.get_error_string());
err=true;
}
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Commit & Close - Done");
delete(backend->dbw);
backend->dbw = NULL;
backend->commit_updates = 0;
backend->commit_time = commit_time;
}
if(err)
{
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Re-creating index database due to error");
try
{
Xapian::WritableDatabase * db = new Xapian::WritableDatabase(backend->db,Xapian::DB_CREATE_OR_OVERWRITE | Xapian::DB_RETRY_LOCK | Xapian::DB_BACKEND_GLASS | Xapian::DB_NO_SYNC);
db->close();
delete(db);
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: Can't re-create Xapian DB (%s) %s : %s - %s",backend->boxname,backend->db,e.get_type(),e.get_error_string());
}
}
if(fts_xapian_settings.verbose>0)
{
if(n>0)
{
i_info("FTS Xapian: Committed '%s' in %ld ms (%ld docs in index)",reason,fts_backend_xapian_current_time() - commit_time,n);
}
else
{
i_info("FTS Xapian: Committed '%s' in %ld ms",reason,fts_backend_xapian_current_time() - commit_time);
}
}
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: fts_backend_xapian_release (%s) - done",reason);
}
XResultSet * fts_backend_xapian_query(Xapian::Database * dbx, XQuerySet * query, long limit=0)
{
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: fts_backend_xapian_query");
XResultSet * set= new XResultSet();
try
{
Xapian::Enquire enquire(*dbx);
Xapian::Query * q = query->get_query(dbx);
enquire.set_query(*q);
enquire.set_docid_order(Xapian::Enquire::DESCENDING);
delete(q);
long offset=0;
long pagesize=100; if(limit>0) { pagesize=std::min(pagesize,limit); }
Xapian::MSet m = enquire.get_mset(0, pagesize);
while(m.size()>0)
{
Xapian::MSetIterator i = m.begin();
while (i != m.end())
{
Xapian::Document doc = i.get_document();
set->add(doc.get_docid());
i++;
}
offset+=pagesize;
m = enquire.get_mset(offset, pagesize);
}
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: xapian_query %s - %s",e.get_type(),e.get_error_string());
}
return set;
}
static int fts_backend_xapian_unset_box(struct xapian_fts_backend *backend)
{
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Unset box '%s' (%s)",backend->boxname,backend->guid);
long commit_time = fts_backend_xapian_current_time();
fts_backend_xapian_oldbox(backend);
fts_backend_xapian_release(backend,"unset_box",commit_time);
if(backend->db != NULL)
{
i_free(backend->db);
backend->db = NULL;
i_free(backend->guid);
backend->guid = NULL;
i_free(backend->boxname);
backend->boxname = NULL;
i_free(backend->expdb);
backend->expdb = NULL;
}
return 0;
}
static int fts_backend_xapian_set_path(struct xapian_fts_backend *backend)
{
struct mail_namespace * ns = backend->backend.ns;
if(ns->alias_for != NULL)
{
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Switching namespace");
ns = ns->alias_for;
}
const char * path = mailbox_list_get_root_forced(ns->list, MAILBOX_LIST_PATH_TYPE_INDEX);
if(backend->path != NULL) i_free(backend->path);
backend->path = i_strconcat(path, "/" XAPIAN_FILE_PREFIX, static_cast<const char*>(NULL));
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Index path = %s",backend->path);
struct stat sb;
if(!( (stat(backend->path, &sb)==0) && S_ISDIR(sb.st_mode)))
{
if (mailbox_list_mkdir_root(backend->backend.ns->list, backend->path, MAILBOX_LIST_PATH_TYPE_INDEX) < 0)
{
i_error("FTS Xapian: can not create '%s'",backend->path);
i_error("FTS Xapian: You need to set mail_uid and mail_gid in your dovecot.conf according to the user of mail_location (%s)", path);
return -1;
}
}
return 0;
}
static int fts_backend_xapian_set_box(struct xapian_fts_backend *backend, struct mailbox *box)
{
if (box == NULL)
{
if(backend->guid != NULL) fts_backend_xapian_unset_box(backend);
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: Box is empty");
return 0;
}
const char * mb;
fts_mailbox_get_guid(box, &mb );
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: Set box '%s' (%s)",box->name,mb);
if((mb == NULL) || (strlen(mb)<3))
{
i_error("FTS Xapian: Invalid box");
return -1;
}
if((backend->guid != NULL) && (strcmp(mb,backend->guid)==0))
{
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: Box is unchanged");
return 0;
}
if(backend->guid != NULL) fts_backend_xapian_unset_box(backend);
if(fts_backend_xapian_set_path(backend)<0) return -1;
long current_time = fts_backend_xapian_current_time();
backend->commit_updates = 0;
backend->commit_time = current_time;
backend->guid = i_strdup(mb);
backend->boxname = i_strdup(box->name);
backend->db = i_strdup_printf("%s/db_%s",backend->path,mb);
backend->expdb = i_strdup_printf("%s_exp.db",backend->db);
char * t = i_strdup_printf("%s/termlist.glass",backend->db);
struct stat sb;
if(!( (stat(t, &sb)==0) && S_ISREG(sb.st_mode)))
{
i_info("FTS Xapian: '%s' (%s) indexes do not exist. Initializing DB",backend->boxname,backend->db);
try
{
Xapian::WritableDatabase * db = new Xapian::WritableDatabase(backend->db,Xapian::DB_CREATE_OR_OVERWRITE | Xapian::DB_RETRY_LOCK | Xapian::DB_BACKEND_GLASS);
db->close();
delete(db);
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: Can't create Xapian DB (%s) %s : %s - %s",backend->boxname,backend->db,e.get_type(),e.get_error_string());
}
}
i_free(t);
/* Performance calculator*/
backend->perf_dt = current_time;
backend->perf_uid=0;
backend->perf_nb=0;
backend->perf_pt=0;
/* End Performance calculator*/
return 0;
}
static void fts_backend_xapian_build_qs(XQuerySet * qs, struct mail_search_arg *a)
{
const char * hdr;
if(fts_xapian_settings.verbose>1) i_info("FTS Xapian: fts_backend_xapian_build_qs");
while(a != NULL)
{
switch (a->type)
{
case SEARCH_TEXT:
case SEARCH_BODY:
case SEARCH_HEADER:
case SEARCH_HEADER_ADDRESS:
case SEARCH_HEADER_COMPRESS_LWSP: break;
default: a = a->next; continue;
}
if((a->hdr_field_name == NULL)||(strlen(a->hdr_field_name)<1))
{
if(a->type == SEARCH_BODY)
{
hdr="body";
}
else
{
hdr=XAPIAN_WILDCARD;
}
}
else
{
hdr=a->hdr_field_name;
}
if((a->value.str == NULL) || (strlen(a->value.str)<1))
{
XQuerySet * q2 = new XQuerySet(false,a->match_not,qs->limit);
fts_backend_xapian_build_qs(q2,a->value.subargs);
if(q2->count()>0)
{
qs->add(q2);
}
else
{
delete(q2);
}
}
else
{
long i=0,j=strlen(hdr);
std::string f2;
while(i<j)
{
if((hdr[i]>' ') && (hdr[i]!='"') && (hdr[i]!='\'') && (hdr[i]!='-'))
{
f2+=tolower(hdr[i]);
}
i++;
}
char * h = i_strdup(f2.c_str());
qs->add(h,a->value.str,a->match_not);
i_free(h);
}
a->match_always=true;
a = a->next;
}
}
bool fts_backend_xapian_index_hdr(struct xapian_fts_backend *backend, uint uid, const char* field, icu::UnicodeString* data)
{
bool ok=true;
if(fts_xapian_settings.verbose>0) i_info("FTS Xapian: fts_backend_xapian_index_hdr");
Xapian::WritableDatabase * dbx = backend->dbw;
if(data->length()<fts_xapian_settings.partial) return true;
if(strlen(field)<1) return true;
long i=0;
while((i<HDRS_NB) && (strcmp(field,hdrs_emails[i])!=0))
{
i++;
}
if(i>=HDRS_NB) return true;
const char * h = hdrs_xapian[i];
XQuerySet * xq = new XQuerySet();
char *u = i_strdup_printf("%d",uid);
xq->add("uid",u);
i_free(u);
XResultSet * result=fts_backend_xapian_query(dbx,xq,1);
Xapian::docid docid;
Xapian::Document * doc = NULL;
try
{
if(result->size<1)
{
doc = new Xapian::Document();
doc->add_value(1,Xapian::sortable_serialise(uid));
u = i_strdup_printf("Q%d",uid);
doc->add_term(u);
docid=dbx->add_document(*doc);
i_free(u);
}
else
{
docid=result->data[0];
doc = new Xapian::Document(dbx->get_document(docid));
}
}
catch(Xapian::Error e)
{
i_error("FTS Xapian: fts_backend_xapian_index_hdr : %s - %s",e.get_type(),e.get_error_string());
if(doc!=NULL) delete(doc);
ok=false;
}
delete(result);