src/filter_zoom.cpp

   1 /* This file is part of Metaproxy.
   2    Copyright (C) 2005-2011 Index Data
   3
   4 Metaproxy is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18
  19 #include "config.hpp"
  20 #include "filter_zoom.hpp"
  21 #include <yaz/zoom.h>
  22 #include <yaz/yaz-version.h>
  23 #include <yaz/srw.h>
  24 #include <metaproxy/package.hpp>
  25 #include <metaproxy/util.hpp>
  26 #include <metaproxy/xmlutil.hpp>
  27 #include "torus.hpp"
  28
  29 #include <libxslt/xsltutils.h>
  30 #include <libxslt/transform.h>
  31
  32 #include <boost/thread/mutex.hpp>
  33 #include <boost/thread/condition.hpp>
  34 #include <yaz/ccl_xml.h>
  35 #include <yaz/ccl.h>
  36 #include <yaz/rpn2cql.h>
  37 #include <yaz/rpn2solr.h>
  38 #include <yaz/pquery.h>
  39 #include <yaz/cql.h>
  40 #include <yaz/oid_db.h>
  41 #include <yaz/diagbib1.h>
  42 #include <yaz/log.h>
  43 #include <yaz/zgdu.h>
  44 #include <yaz/querytowrbuf.h>
  45
  46 namespace mp = metaproxy_1;
  47 namespace yf = mp::filter;
  48
  49 namespace metaproxy_1 {
  50     namespace filter {
  51         struct Zoom::Searchable : boost::noncopyable {
  52             std::string authentication;
  53             std::string cfAuth;
  54             std::string cfProxy;
  55             std::string cfSubDb;
  56             std::string udb;
  57             std::string target;
  58             std::string query_encoding;
  59             std::string sru;
  60             std::string request_syntax;
  61             std::string element_set;
  62             std::string record_encoding;
  63             std::string transform_xsl_fname;
  64             std::string urlRecipe;
  65             bool use_turbomarc;
  66             bool piggyback;
  67             CCL_bibset ccl_bibset;
  68             Searchable(CCL_bibset base);
  69             ~Searchable();
  70         };
  71         class Zoom::Backend : boost::noncopyable {
  72             friend class Impl;
  73             friend class Frontend;
  74             std::string zurl;
  75             ZOOM_connection m_connection;
  76             ZOOM_resultset m_resultset;
  77             std::string m_frontend_database;
  78             SearchablePtr sptr;
  79             xsltStylesheetPtr xsp;
  80         public:
  81             Backend(SearchablePtr sptr);
  82             ~Backend();
  83             void connect(std::string zurl, int *error, const char **addinfo);
  84             void search_pqf(const char *pqf, Odr_int *hits,
  85                             int *error, const char **addinfo);
  86             void search_cql(const char *cql, Odr_int *hits,
  87                             int *error, const char **addinfo);
  88             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
  89                          int *error, const char **addinfo);
  90             void set_option(const char *name, const char *value);
  91             const char *get_option(const char *name);
  92             void get_zoom_error(int *error, const char **addinfo);
  93         };
  94         class Zoom::Frontend : boost::noncopyable {
  95             friend class Impl;
  96             Impl *m_p;
  97             bool m_is_virtual;
  98             bool m_in_use;
  99             yazpp_1::GDU m_init_gdu;
 100             BackendPtr m_backend;
 101             void handle_package(mp::Package &package);
 102             void handle_search(mp::Package &package);
 103             void handle_present(mp::Package &package);
 104             BackendPtr get_backend_from_databases(std::string &database,
 105                                                   int *error,
 106                                                   char **addinfo,
 107                                                   ODR odr);
 108             Z_Records *get_records(Odr_int start,
 109                                    Odr_int number_to_present,
 110                                    int *error,
 111                                    const char **addinfo,
 112                                    Odr_int *number_of_records_returned,
 113                                    ODR odr, BackendPtr b,
 114                                    Odr_oid *preferredRecordSyntax,
 115                                    const char *element_set_name);
 116         public:
 117             Frontend(Impl *impl);
 118             ~Frontend();
 119         };
 120         class Zoom::Impl {
 121             friend class Frontend;
 122         public:
 123             Impl();
 124             ~Impl();
 125             void process(metaproxy_1::Package & package);
 126             void configure(const xmlNode * ptr, bool test_only,
 127                            const char *path);
 128         private:
 129             void configure_local_records(const xmlNode * ptr, bool test_only);
 130             FrontendPtr get_frontend(mp::Package &package);
 131             void release_frontend(mp::Package &package);
 132             SearchablePtr parse_torus_record(const xmlNode *ptr);
 133             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 134             std::map<mp::Session, FrontendPtr> m_clients;
 135             boost::mutex m_mutex;
 136             boost::condition m_cond_session_ready;
 137             std::string torus_url;
 138             std::map<std::string,std::string> fieldmap;
 139             std::string xsldir;
 140             std::string file_path;
 141             CCL_bibset bibset;
 142             std::string element_transform;
 143             std::string element_raw;
 144             std::map<std::string,SearchablePtr> s_map;
 145         };
 146     }
 147 }
 148
 149 // define Pimpl wrapper forwarding to Impl
 150
 151 yf::Zoom::Zoom() : m_p(new Impl)
 152 {
 153 }
 154
 155 yf::Zoom::~Zoom()
 156 {  // must have a destructor because of boost::scoped_ptr
 157 }
 158
 159 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 160                          const char *path)
 161 {
 162     m_p->configure(xmlnode, test_only, path);
 163 }
 164
 165 void yf::Zoom::process(mp::Package &package) const
 166 {
 167     m_p->process(package);
 168 }
 169
 170
 171 // define Implementation stuff
 172
 173 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 174 {
 175     m_connection = ZOOM_connection_create(0);
 176     m_resultset = 0;
 177     xsp = 0;
 178 }
 179
 180 yf::Zoom::Backend::~Backend()
 181 {
 182     if (xsp)
 183         xsltFreeStylesheet(xsp);
 184     ZOOM_connection_destroy(m_connection);
 185     ZOOM_resultset_destroy(m_resultset);
 186 }
 187
 188
 189 void yf::Zoom::Backend::get_zoom_error(int *error, const char **addinfo)
 190 {
 191     const char *msg = 0;
 192     *error = ZOOM_connection_error(m_connection, &msg, addinfo);
 193     if (*error)
 194     {
 195         if (*error >= ZOOM_ERROR_CONNECT)
 196         {
 197             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 198             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 199             if (addinfo)
 200                 *addinfo = msg;
 201         }
 202     }
 203 }
 204
 205 void yf::Zoom::Backend::connect(std::string zurl,
 206                                 int *error, const char **addinfo)
 207 {
 208     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 209     get_zoom_error(error, addinfo);
 210 }
 211
 212 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
 213                                    int *error, const char **addinfo)
 214 {
 215     m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
 216     get_zoom_error(error, addinfo);
 217     if (*error == 0)
 218         *hits = ZOOM_resultset_size(m_resultset);
 219     else
 220         *hits = 0;
 221 }
 222
 223 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
 224                                    int *error, const char **addinfo)
 225 {
 226     ZOOM_query q = ZOOM_query_create();
 227
 228     ZOOM_query_cql(q, cql);
 229
 230     m_resultset = ZOOM_connection_search(m_connection, q);
 231     ZOOM_query_destroy(q);
 232     get_zoom_error(error, addinfo);
 233     if (*error == 0)
 234         *hits = ZOOM_resultset_size(m_resultset);
 235     else
 236         *hits = 0;
 237 }
 238
 239 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 240                                 ZOOM_record *recs,
 241                                 int *error, const char **addinfo)
 242 {
 243     ZOOM_resultset_records(m_resultset, recs, start, number);
 244     get_zoom_error(error, addinfo);
 245 }
 246
 247 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 248 {
 249     ZOOM_connection_option_set(m_connection, name, value);
 250     if (m_resultset)
 251         ZOOM_resultset_option_set(m_resultset, name, value);
 252 }
 253
 254 const char *yf::Zoom::Backend::get_option(const char *name)
 255 {
 256     return ZOOM_connection_option_get(m_connection, name);
 257 }
 258
 259 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 260 {
 261     piggyback = true;
 262     use_turbomarc = true;
 263     ccl_bibset = ccl_qual_dup(base);
 264 }
 265
 266 yf::Zoom::Searchable::~Searchable()
 267 {
 268     ccl_qual_rm(&ccl_bibset);
 269 }
 270
 271 yf::Zoom::Frontend::Frontend(Impl *impl) :
 272     m_p(impl), m_is_virtual(false), m_in_use(true)
 273 {
 274 }
 275
 276 yf::Zoom::Frontend::~Frontend()
 277 {
 278 }
 279
 280 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 281 {
 282     boost::mutex::scoped_lock lock(m_mutex);
 283
 284     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 285
 286     while(true)
 287     {
 288         it = m_clients.find(package.session());
 289         if (it == m_clients.end())
 290             break;
 291
 292         if (!it->second->m_in_use)
 293         {
 294             it->second->m_in_use = true;
 295             return it->second;
 296         }
 297         m_cond_session_ready.wait(lock);
 298     }
 299     FrontendPtr f(new Frontend(this));
 300     m_clients[package.session()] = f;
 301     f->m_in_use = true;
 302     return f;
 303 }
 304
 305 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 306 {
 307     boost::mutex::scoped_lock lock(m_mutex);
 308     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 309
 310     it = m_clients.find(package.session());
 311     if (it != m_clients.end())
 312     {
 313         if (package.session().is_closed())
 314         {
 315             m_clients.erase(it);
 316         }
 317         else
 318         {
 319             it->second->m_in_use = false;
 320         }
 321         m_cond_session_ready.notify_all();
 322     }
 323 }
 324
 325 yf::Zoom::Impl::Impl() : element_transform("pz2") , element_raw("raw")
 326 {
 327     bibset = ccl_qual_mk();
 328 }
 329
 330 yf::Zoom::Impl::~Impl()
 331 {
 332     ccl_qual_rm(&bibset);
 333 }
 334
 335 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 336 {
 337     Zoom::SearchablePtr s(new Searchable(bibset));
 338
 339     for (ptr = ptr->children; ptr; ptr = ptr->next)
 340     {
 341         if (ptr->type != XML_ELEMENT_NODE)
 342             continue;
 343         if (!strcmp((const char *) ptr->name, "layer"))
 344             ptr = ptr->children;
 345         else if (!strcmp((const char *) ptr->name,
 346                          "authentication"))
 347         {
 348             s->authentication = mp::xml::get_text(ptr);
 349         }
 350         else if (!strcmp((const char *) ptr->name,
 351                          "cfAuth"))
 352         {
 353             s->cfAuth = mp::xml::get_text(ptr);
 354         }
 355         else if (!strcmp((const char *) ptr->name,
 356                          "cfProxy"))
 357         {
 358             s->cfProxy = mp::xml::get_text(ptr);
 359         }
 360         else if (!strcmp((const char *) ptr->name,
 361                          "cfSubDb"))
 362         {
 363             s->cfSubDb = mp::xml::get_text(ptr);
 364         }
 365         else if (!strcmp((const char *) ptr->name, "udb"))
 366         {
 367             s->udb = mp::xml::get_text(ptr);
 368         }
 369         else if (!strcmp((const char *) ptr->name, "zurl"))
 370         {
 371             s->target = mp::xml::get_text(ptr);
 372         }
 373         else if (!strcmp((const char *) ptr->name, "sru"))
 374         {
 375             s->sru = mp::xml::get_text(ptr);
 376         }
 377         else if (!strcmp((const char *) ptr->name,
 378                          "queryEncoding"))
 379         {
 380             s->query_encoding = mp::xml::get_text(ptr);
 381         }
 382         else if (!strcmp((const char *) ptr->name,
 383                          "piggyback"))
 384         {
 385             s->piggyback = mp::xml::get_bool(ptr, true);
 386         }
 387         else if (!strcmp((const char *) ptr->name,
 388                          "requestSyntax"))
 389         {
 390             s->request_syntax = mp::xml::get_text(ptr);
 391         }
 392         else if (!strcmp((const char *) ptr->name,
 393                          "elementSet"))
 394         {
 395             s->element_set = mp::xml::get_text(ptr);
 396         }
 397         else if (!strcmp((const char *) ptr->name,
 398                          "recordEncoding"))
 399         {
 400             s->record_encoding = mp::xml::get_text(ptr);
 401         }
 402         else if (!strcmp((const char *) ptr->name,
 403                          "transform"))
 404         {
 405             s->transform_xsl_fname = mp::xml::get_text(ptr);
 406         }
 407         else if (!strcmp((const char *) ptr->name,
 408                          "urlRecipe"))
 409         {
 410             s->urlRecipe = mp::xml::get_text(ptr);
 411         }
 412         else if (!strcmp((const char *) ptr->name,
 413                          "useTurboMarc"))
 414         {
 415             ; // useTurboMarc is ignored
 416         }
 417         else if (!strncmp((const char *) ptr->name,
 418                           "cclmap_", 7))
 419         {
 420             std::string value = mp::xml::get_text(ptr);
 421             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 422                            (const char *) ptr->name + 7);
 423         }
 424     }
 425     return s;
 426 }
 427
 428 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 429 {
 430     while (ptr && ptr->type != XML_ELEMENT_NODE)
 431         ptr = ptr->next;
 432
 433     if (ptr)
 434     {
 435         if (!strcmp((const char *) ptr->name, "records"))
 436         {
 437             for (ptr = ptr->children; ptr; ptr = ptr->next)
 438             {
 439                 if (ptr->type != XML_ELEMENT_NODE)
 440                     continue;
 441                 if (!strcmp((const char *) ptr->name, "record"))
 442                 {
 443                     SearchablePtr s = parse_torus_record(ptr);
 444                     if (s)
 445                     {
 446                         std::string udb = s->udb;
 447                         if (udb.length())
 448                             s_map[s->udb] = s;
 449                         else
 450                         {
 451                             throw mp::filter::FilterException
 452                                 ("No udb for local torus record");
 453                         }
 454                     }
 455                 }
 456                 else
 457                 {
 458                     throw mp::filter::FilterException
 459                         ("Bad element "
 460                          + std::string((const char *) ptr->name)
 461                          + " in zoom filter inside element "
 462                          "<torus><records>");
 463                 }
 464             }
 465         }
 466         else
 467         {
 468             throw mp::filter::FilterException
 469                 ("Bad element "
 470                  + std::string((const char *) ptr->name)
 471                  + " in zoom filter inside element <torus>");
 472         }
 473     }
 474 }
 475
 476 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 477                                const char *path)
 478 {
 479     if (path && *path)
 480     {
 481         file_path = path;
 482         if (path[strlen(path)-1] != '/')
 483             file_path += "/";
 484     }
 485     for (ptr = ptr->children; ptr; ptr = ptr->next)
 486     {
 487         if (ptr->type != XML_ELEMENT_NODE)
 488             continue;
 489         else if (!strcmp((const char *) ptr->name, "torus"))
 490         {
 491             const struct _xmlAttr *attr;
 492             for (attr = ptr->properties; attr; attr = attr->next)
 493             {
 494                 if (!strcmp((const char *) attr->name, "url"))
 495                     torus_url = mp::xml::get_text(attr->children);
 496                 else if (!strcmp((const char *) attr->name, "xsldir"))
 497                     xsldir = mp::xml::get_text(attr->children);
 498                 else if (!strcmp((const char *) attr->name, "element_transform"))
 499                     element_transform = mp::xml::get_text(attr->children);
 500                 else if (!strcmp((const char *) attr->name, "element_raw"))
 501                     element_raw = mp::xml::get_text(attr->children);
 502                 else
 503                     throw mp::filter::FilterException(
 504                         "Bad attribute " + std::string((const char *)
 505                                                        attr->name));
 506             }
 507             configure_local_records(ptr->children, test_only);
 508         }
 509         else if (!strcmp((const char *) ptr->name, "cclmap"))
 510         {
 511             const char *addinfo = 0;
 512             ccl_xml_config(bibset, ptr, &addinfo);
 513         }
 514         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 515         {
 516             const struct _xmlAttr *attr;
 517             std::string ccl_field;
 518             std::string cql_field;
 519             for (attr = ptr->properties; attr; attr = attr->next)
 520             {
 521                 if (!strcmp((const char *) attr->name, "ccl"))
 522                     ccl_field = mp::xml::get_text(attr->children);
 523                 else if (!strcmp((const char *) attr->name, "cql"))
 524                     cql_field = mp::xml::get_text(attr->children);
 525                 else
 526                     throw mp::filter::FilterException(
 527                         "Bad attribute " + std::string((const char *)
 528                                                        attr->name));
 529             }
 530             if (cql_field.length())
 531                 fieldmap[cql_field] = ccl_field;
 532         }
 533         else
 534         {
 535             throw mp::filter::FilterException
 536                 ("Bad element "
 537                  + std::string((const char *) ptr->name)
 538                  + " in zoom filter");
 539         }
 540     }
 541 }
 542
 543 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 544     std::string &database, int *error, char **addinfo, ODR odr)
 545 {
 546     std::list<BackendPtr>::const_iterator map_it;
 547     if (m_backend && m_backend->m_frontend_database == database)
 548         return m_backend;
 549
 550     const char *sru_proxy = 0;
 551     std::string db_args;
 552     std::string torus_db;
 553     size_t db_arg_pos = database.find(',');
 554     if (db_arg_pos != std::string::npos)
 555     {
 556         torus_db = database.substr(0, db_arg_pos);
 557         db_args = database.substr(db_arg_pos + 1);
 558     }
 559     else
 560         torus_db = database;
 561
 562     SearchablePtr sptr;
 563
 564     std::map<std::string,SearchablePtr>::iterator it;
 565     it = m_p->s_map.find(torus_db);
 566     if (it != m_p->s_map.end())
 567         sptr = it->second;
 568     else
 569     {
 570         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
 571         if (!doc)
 572         {
 573             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 574             *addinfo = odr_strdup(odr, database.c_str());
 575             BackendPtr b;
 576             return b;
 577         }
 578         const xmlNode *ptr = xmlDocGetRootElement(doc);
 579         if (ptr)
 580         {   // presumably ptr is a records element node
 581             // parse first record in document
 582             for (ptr = ptr->children; ptr; ptr = ptr->next)
 583             {
 584                 if (ptr->type == XML_ELEMENT_NODE
 585                     && !strcmp((const char *) ptr->name, "record"))
 586                 {
 587                     sptr = m_p->parse_torus_record(ptr);
 588                     break;
 589                 }
 590             }
 591         }
 592         xmlFreeDoc(doc);
 593     }
 594
 595     if (!sptr)
 596     {
 597         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 598         *addinfo = odr_strdup(odr, database.c_str());
 599         BackendPtr b;
 600         return b;
 601     }
 602
 603     xsltStylesheetPtr xsp = 0;
 604     if (sptr->transform_xsl_fname.length())
 605     {
 606         std::string fname;
 607
 608         if (m_p->xsldir.length())
 609             fname = m_p->xsldir + "/" + sptr->transform_xsl_fname;
 610         else
 611             fname = m_p->file_path + sptr->transform_xsl_fname;
 612         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 613         if (!xsp_doc)
 614         {
 615             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 616             *addinfo = (char *) odr_malloc(odr, 40 + strlen(fname.c_str()));
 617             sprintf(*addinfo, "xmlParseFile failed. File %s", fname.c_str());
 618             BackendPtr b;
 619             return b;
 620         }
 621         xsp = xsltParseStylesheetDoc(xsp_doc);
 622         if (!xsp)
 623         {
 624             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 625             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 626             BackendPtr b;
 627             xmlFreeDoc(xsp_doc);
 628             return b;
 629         }
 630     }
 631
 632     m_backend.reset();
 633
 634     BackendPtr b(new Backend(sptr));
 635
 636     b->xsp = xsp;
 637     b->m_frontend_database = database;
 638     std::string authentication = sptr->authentication;
 639
 640     b->set_option("timeout", "40");
 641
 642     if (sptr->query_encoding.length())
 643         b->set_option("rpnCharset", sptr->query_encoding.c_str());
 644
 645     if (sptr->cfAuth.length())
 646     {
 647         // A CF target
 648         b->set_option("user", sptr->cfAuth.c_str());
 649         if (db_args.length() == 0)
 650         {
 651             if (authentication.length())
 652             {
 653                 // no database (auth) args specified already.. and the
 654                 // Torus authentication has it.. Generate the args that CF
 655                 // understands..
 656                 size_t found = authentication.find('/');
 657                 if (found != std::string::npos)
 658                 {
 659                     db_args += "user=" + mp::util::uri_encode(authentication.substr(0, found))
 660                         + "&password=" + mp::util::uri_encode(authentication.substr(found+1));
 661                 }
 662                 else
 663                     db_args += "user=" + mp::util::uri_encode(authentication);
 664             }
 665             if (sptr->cfProxy.length())
 666             {
 667                 if (db_args.length())
 668                     db_args += "&";
 669                 db_args += "proxy=" + mp::util::uri_encode(sptr->cfProxy);
 670             }
 671         }
 672         if (sptr->cfSubDb.length())
 673         {
 674             if (db_args.length())
 675                 db_args += "&";
 676             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 677         }
 678     }
 679     else
 680     {
 681         // A non-CF target
 682         if (db_args.length())
 683         {
 684             // user has specified backend authentication
 685             const char *param_user = 0;
 686             const char *param_password = 0;
 687             char **names;
 688             char **values;
 689             int i;
 690             int no_parms = yaz_uri_to_array(db_args.c_str(),
 691                                             odr, &names, &values);
 692             for (i = 0; i < no_parms; i++)
 693             {
 694                 const char *name = names[i];
 695                 const char *value = values[i];
 696                 if (!strcmp(name, "user"))
 697                     param_user = value;
 698                 else if (!strcmp(name, "password"))
 699                     param_password = value;
 700                 else if (!strcmp(name, "proxy"))
 701                     sru_proxy = value;
 702                 else
 703                 {
 704                     BackendPtr notfound;
 705                     char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 706                     *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 707                     sprintf(msg, "Bad database argument: %s", name);
 708                     *addinfo = msg;
 709                     return notfound;
 710                 }
 711             }
 712             if (param_user && param_password)
 713             {
 714                 char *auth = (char*) odr_malloc(
 715                     odr, strlen(param_user) + strlen(param_password) + 2);
 716                 strcpy(auth, param_user);
 717                 strcat(auth, "/");
 718                 strcat(auth, param_password);
 719                 b->set_option("user", auth);
 720             }
 721             db_args.clear(); // no arguments to be passed (non-CF)
 722         }
 723         else
 724         {
 725             // use authentication from Torus, if given
 726             if (authentication.length())
 727                 b->set_option("user", authentication.c_str());
 728         }
 729     }
 730
 731     if (sru_proxy)
 732         b->set_option("proxy", sru_proxy);
 733
 734     std::string url;
 735     if (sptr->sru.length())
 736     {
 737         url = "http://" + sptr->target;
 738         b->set_option("sru", sptr->sru.c_str());
 739     }
 740     else
 741     {
 742         url = sptr->target;
 743     }
 744     if (db_args.length())
 745         url += "," + db_args;
 746     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 747     const char *addinfo_c = 0;
 748     b->connect(url, error, &addinfo_c);
 749     if (addinfo_c)
 750         *addinfo = odr_strdup(odr, addinfo_c);
 751     if (*error == 0)
 752     {
 753         m_backend = b;
 754     }
 755     return b;
 756 }
 757
 758 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 759                                            Odr_int number_to_present,
 760                                            int *error,
 761                                            const char **addinfo,
 762                                            Odr_int *number_of_records_returned,
 763                                            ODR odr,
 764                                            BackendPtr b,
 765                                            Odr_oid *preferredRecordSyntax,
 766                                            const char *element_set_name)
 767 {
 768     *number_of_records_returned = 0;
 769     Z_Records *records = 0;
 770     bool enable_pz2_retrieval = false; // whether target profile is used
 771     bool enable_pz2_transform = false; // whether XSLT is used as well
 772     bool assume_marc8_charset = false;
 773
 774     if (start < 0 || number_to_present <= 0)
 775         return records;
 776
 777     if (number_to_present > 10000)
 778         number_to_present = 10000;
 779
 780     ZOOM_record *recs = (ZOOM_record *)
 781         odr_malloc(odr, number_to_present * sizeof(*recs));
 782
 783     char oid_name_str[OID_STR_MAX];
 784     const char *syntax_name = 0;
 785
 786     if (preferredRecordSyntax &&
 787         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 788         && element_set_name)
 789     {
 790         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 791         {
 792             enable_pz2_retrieval = true;
 793             enable_pz2_transform = true;
 794         }
 795         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 796         {
 797             enable_pz2_retrieval = true;
 798         }
 799     }
 800
 801     if (enable_pz2_retrieval)
 802     {
 803         if (b->sptr->request_syntax.length())
 804         {
 805             syntax_name = b->sptr->request_syntax.c_str();
 806             const Odr_oid *syntax_oid =
 807                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 808             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 809                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 810                 assume_marc8_charset = true;
 811         }
 812     }
 813     else if (preferredRecordSyntax)
 814         syntax_name =
 815             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 816
 817     b->set_option("preferredRecordSyntax", syntax_name);
 818
 819     if (enable_pz2_retrieval)
 820     {
 821         element_set_name = 0;
 822         if (b->sptr->element_set.length())
 823             element_set_name = b->sptr->element_set.c_str();
 824     }
 825
 826     b->set_option("elementSetName", element_set_name);
 827
 828     b->present(start, number_to_present, recs, error, addinfo);
 829
 830     Odr_int i = 0;
 831     if (!*error)
 832     {
 833         for (i = 0; i < number_to_present; i++)
 834             if (!recs[i])
 835                 break;
 836     }
 837     if (i > 0)
 838     {  // only return records if no error and at least one record
 839         char *odr_database = odr_strdup(odr,
 840                                         b->m_frontend_database.c_str());
 841         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 842             odr_malloc(odr, sizeof(*npl));
 843         *number_of_records_returned = i;
 844         npl->num_records = i;
 845         npl->records = (Z_NamePlusRecord **)
 846             odr_malloc(odr, i * sizeof(*npl->records));
 847         for (i = 0; i < number_to_present; i++)
 848         {
 849             Z_NamePlusRecord *npr = 0;
 850             const char *addinfo;
 851             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
 852                                               &addinfo, 0 /* diagset */);
 853
 854             if (sur_error)
 855             {
 856                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
 857                                             addinfo);
 858             }
 859             else if (enable_pz2_retrieval)
 860             {
 861                 char rec_type_str[100];
 862                 const char *record_encoding = 0;
 863
 864                 if (b->sptr->record_encoding.length())
 865                     record_encoding = b->sptr->record_encoding.c_str();
 866                 else if (assume_marc8_charset)
 867                     record_encoding = "marc8";
 868
 869                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
 870                 if (record_encoding)
 871                 {
 872                     strcat(rec_type_str, "; charset=");
 873                     strcat(rec_type_str, record_encoding);
 874                 }
 875
 876                 int rec_len;
 877                 xmlChar *xmlrec_buf = 0;
 878                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
 879                                                       &rec_len);
 880                 if (rec_buf && b->xsp && enable_pz2_transform)
 881                 {
 882                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
 883                     if (rec_doc)
 884                     {
 885                         xmlDoc *rec_res;
 886                         rec_res = xsltApplyStylesheet(b->xsp, rec_doc, 0);
 887
 888                         if (rec_res)
 889                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
 890                                                    rec_res, b->xsp);
 891                         rec_buf = (const char *) xmlrec_buf;
 892                         xmlFreeDoc(rec_doc);
 893                         xmlFreeDoc(rec_res);
 894                     }
 895                 }
 896
 897                 if (rec_buf)
 898                 {
 899                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
 900                     std::string res =
 901                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
 902                     if (res.length())
 903                     {
 904                         xmlNode *ptr = xmlDocGetRootElement(doc);
 905                         while (ptr && ptr->type != XML_ELEMENT_NODE)
 906                             ptr = ptr->next;
 907                         xmlNode *c =
 908                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
 909                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
 910                         xmlAddChild(c, t);
 911
 912                         if (xmlrec_buf)
 913                             xmlFree(xmlrec_buf);
 914
 915                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
 916                         rec_buf = (const char *) xmlrec_buf;
 917                     }
 918                     xmlFreeDoc(doc);
 919                 }
 920                 if (rec_buf)
 921                 {
 922                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
 923                     npr->databaseName = odr_database;
 924                     npr->which = Z_NamePlusRecord_databaseRecord;
 925                     npr->u.databaseRecord =
 926                         z_ext_record_xml(odr, rec_buf, rec_len);
 927                 }
 928                 else
 929                 {
 930                     npr = zget_surrogateDiagRec(
 931                         odr, odr_database,
 932                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
 933                         rec_type_str);
 934                 }
 935                 if (xmlrec_buf)
 936                     xmlFree(xmlrec_buf);
 937             }
 938             else
 939             {
 940                 Z_External *ext =
 941                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
 942                 if (ext)
 943                 {
 944                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
 945                     npr->databaseName = odr_database;
 946                     npr->which = Z_NamePlusRecord_databaseRecord;
 947                     npr->u.databaseRecord = ext;
 948                 }
 949                 else
 950                 {
 951                     npr = zget_surrogateDiagRec(
 952                         odr, odr_database,
 953                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
 954                         "ZOOM_record, type ext");
 955                 }
 956             }
 957             npl->records[i] = npr;
 958         }
 959         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
 960         records->which = Z_Records_DBOSD;
 961         records->u.databaseOrSurDiagnostics = npl;
 962     }
 963     return records;
 964 }
 965
 966 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
 967                                                     ODR odr)
 968 {
 969     struct cql_node *r = 0;
 970     if (!cn)
 971         return 0;
 972     switch (cn->which)
 973     {
 974     case CQL_NODE_ST:
 975         if (cn->u.st.index)
 976         {
 977             std::map<std::string,std::string>::const_iterator it;
 978             it = fieldmap.find(cn->u.st.index);
 979             if (it == fieldmap.end())
 980                 return cn;
 981             if (it->second.length())
 982                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
 983             else
 984                 cn->u.st.index = 0;
 985         }
 986         break;
 987     case CQL_NODE_BOOL:
 988         r = convert_cql_fields(cn->u.boolean.left, odr);
 989         if (!r)
 990             r = convert_cql_fields(cn->u.boolean.right, odr);
 991         break;
 992     case CQL_NODE_SORT:
 993         r = convert_cql_fields(cn->u.sort.search, odr);
 994         break;
 995     }
 996     return r;
 997 }
 998
 999 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1000 {
1001     Z_GDU *gdu = package.request().get();
1002     Z_APDU *apdu_req = gdu->u.z3950;
1003     Z_APDU *apdu_res = 0;
1004     mp::odr odr;
1005     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1006     if (sr->num_databaseNames != 1)
1007     {
1008         apdu_res = odr.create_searchResponse(
1009             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1010         package.response() = apdu_res;
1011         return;
1012     }
1013
1014     int error = 0;
1015     char *addinfo_s = 0;
1016     std::string db(sr->databaseNames[0]);
1017     BackendPtr b = get_backend_from_databases(db, &error, &addinfo_s, odr);
1018     if (error)
1019     {
1020         apdu_res =
1021             odr.create_searchResponse(
1022                 apdu_req, error, addinfo_s);
1023         package.response() = apdu_res;
1024         return;
1025     }
1026
1027     const char *addinfo_c = 0;
1028     b->set_option("setname", "default");
1029
1030     Odr_int hits = 0;
1031     Z_Query *query = sr->query;
1032     WRBUF ccl_wrbuf = 0;
1033     WRBUF pqf_wrbuf = 0;
1034
1035     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1036     {
1037         // RPN
1038         pqf_wrbuf = wrbuf_alloc();
1039         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1040     }
1041     else if (query->which == Z_Query_type_2)
1042     {
1043         // CCL
1044         ccl_wrbuf = wrbuf_alloc();
1045         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1046                     query->u.type_2->len);
1047     }
1048     else if (query->which == Z_Query_type_104 &&
1049              query->u.type_104->which == Z_External_CQL)
1050     {
1051         // CQL
1052         const char *cql = query->u.type_104->u.cql;
1053         CQL_parser cp = cql_parser_create();
1054         int r = cql_parser_string(cp, cql);
1055         if (r)
1056         {
1057             cql_parser_destroy(cp);
1058             apdu_res =
1059                 odr.create_searchResponse(apdu_req,
1060                                           YAZ_BIB1_MALFORMED_QUERY,
1061                                           "CQL syntax error");
1062             package.response() = apdu_res;
1063             return;
1064         }
1065         struct cql_node *cn = cql_parser_result(cp);
1066         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1067         if (cn_error)
1068         {
1069             // hopefully we are getting a ptr to a index+relation+term node
1070             addinfo_c = 0;
1071             if (cn_error->which == CQL_NODE_ST)
1072                 addinfo_c = cn_error->u.st.index;
1073
1074             apdu_res =
1075                 odr.create_searchResponse(apdu_req,
1076                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1077                                           addinfo_c);
1078             package.response() = apdu_res;
1079             return;
1080         }
1081         char ccl_buf[1024];
1082
1083         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1084         if (r == 0)
1085         {
1086             ccl_wrbuf = wrbuf_alloc();
1087             wrbuf_puts(ccl_wrbuf, ccl_buf);
1088         }
1089         cql_parser_destroy(cp);
1090         if (r)
1091         {
1092             apdu_res =
1093                 odr.create_searchResponse(apdu_req,
1094                                           YAZ_BIB1_MALFORMED_QUERY,
1095                                           "CQL to CCL conversion error");
1096             package.response() = apdu_res;
1097             return;
1098         }
1099     }
1100     else
1101     {
1102         apdu_res =
1103             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1104         package.response() = apdu_res;
1105         return;
1106     }
1107
1108     if (ccl_wrbuf)
1109     {
1110         // CCL to PQF
1111         assert(pqf_wrbuf == 0);
1112         int cerror, cpos;
1113         struct ccl_rpn_node *cn;
1114         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1115         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1116                           &cerror, &cpos);
1117         wrbuf_destroy(ccl_wrbuf);
1118         if (!cn)
1119         {
1120             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1121             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1122
1123             switch (cerror)
1124             {
1125             case CCL_ERR_UNKNOWN_QUAL:
1126                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1127                 break;
1128             case CCL_ERR_TRUNC_NOT_LEFT:
1129             case CCL_ERR_TRUNC_NOT_RIGHT:
1130             case CCL_ERR_TRUNC_NOT_BOTH:
1131                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1132                 break;
1133             }
1134             apdu_res =
1135                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1136             package.response() = apdu_res;
1137             return;
1138         }
1139         pqf_wrbuf = wrbuf_alloc();
1140         ccl_pquery(pqf_wrbuf, cn);
1141         ccl_rpn_delete(cn);
1142     }
1143
1144     assert(pqf_wrbuf);
1145     if (b->get_option("sru"))
1146     {
1147         int status = 0;
1148         Z_RPNQuery *zquery;
1149         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1150         WRBUF wrb = wrbuf_alloc();
1151
1152         if (!strcmp(b->get_option("sru"), "solr"))
1153         {
1154             solr_transform_t cqlt = solr_transform_create();
1155
1156             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1157
1158             solr_transform_close(cqlt);
1159         }
1160         else
1161         {
1162             cql_transform_t cqlt = cql_transform_create();
1163
1164             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1165
1166             cql_transform_close(cqlt);
1167         }
1168         if (status == 0)
1169         {
1170             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1171             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo_c);
1172         }
1173
1174         wrbuf_destroy(wrb);
1175         wrbuf_destroy(pqf_wrbuf);
1176         if (status)
1177         {
1178             apdu_res =
1179                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1180                                           "can not convert from RPN to CQL/SOLR");
1181             package.response() = apdu_res;
1182             return;
1183         }
1184     }
1185     else
1186     {
1187         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1188         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo_c);
1189         wrbuf_destroy(pqf_wrbuf);
1190     }
1191
1192
1193     const char *element_set_name = 0;
1194     Odr_int number_to_present = 0;
1195     if (!error)
1196         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1197
1198     Odr_int number_of_records_returned = 0;
1199     Z_Records *records = get_records(
1200         0, number_to_present, &error, &addinfo_c,
1201         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1202         element_set_name);
1203     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo_c);
1204     if (records)
1205     {
1206         apdu_res->u.searchResponse->records = records;
1207         apdu_res->u.searchResponse->numberOfRecordsReturned =
1208             odr_intdup(odr, number_of_records_returned);
1209     }
1210     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1211     package.response() = apdu_res;
1212 }
1213
1214 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1215 {
1216     Z_GDU *gdu = package.request().get();
1217     Z_APDU *apdu_req = gdu->u.z3950;
1218     Z_APDU *apdu_res = 0;
1219     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1220
1221     mp::odr odr;
1222     if (!m_backend)
1223     {
1224         package.response() = odr.create_presentResponse(
1225             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1226         return;
1227     }
1228     const char *element_set_name = 0;
1229     Z_RecordComposition *comp = pr->recordComposition;
1230     if (comp && comp->which != Z_RecordComp_simple)
1231     {
1232         package.response() = odr.create_presentResponse(
1233             apdu_req,
1234             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1235         return;
1236     }
1237     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1238         element_set_name = comp->u.simple->u.generic;
1239     Odr_int number_of_records_returned = 0;
1240     int error = 0;
1241     const char *addinfo = 0;
1242     Z_Records *records = get_records(
1243         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1244         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1245         pr->preferredRecordSyntax, element_set_name);
1246
1247     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1248     if (records)
1249     {
1250         apdu_res->u.presentResponse->records = records;
1251         apdu_res->u.presentResponse->numberOfRecordsReturned =
1252             odr_intdup(odr, number_of_records_returned);
1253     }
1254     package.response() = apdu_res;
1255 }
1256
1257 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1258 {
1259     Z_GDU *gdu = package.request().get();
1260     if (!gdu)
1261         ;
1262     else if (gdu->which == Z_GDU_Z3950)
1263     {
1264         Z_APDU *apdu_req = gdu->u.z3950;
1265         if (apdu_req->which == Z_APDU_initRequest)
1266         {
1267             mp::odr odr;
1268             package.response() = odr.create_close(
1269                 apdu_req,
1270                 Z_Close_protocolError,
1271                 "double init");
1272         }
1273         else if (apdu_req->which == Z_APDU_searchRequest)
1274         {
1275             handle_search(package);
1276         }
1277         else if (apdu_req->which == Z_APDU_presentRequest)
1278         {
1279             handle_present(package);
1280         }
1281         else
1282         {
1283             mp::odr odr;
1284             package.response() = odr.create_close(
1285                 apdu_req,
1286                 Z_Close_protocolError,
1287                 "zoom filter cannot handle this APDU");
1288             package.session().close();
1289         }
1290     }
1291     else
1292     {
1293         package.session().close();
1294     }
1295 }
1296
1297 void yf::Zoom::Impl::process(mp::Package &package)
1298 {
1299     FrontendPtr f = get_frontend(package);
1300     Z_GDU *gdu = package.request().get();
1301
1302     if (f->m_is_virtual)
1303     {
1304         f->handle_package(package);
1305     }
1306     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1307              Z_APDU_initRequest)
1308     {
1309         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1310         f->m_init_gdu = gdu;
1311
1312         mp::odr odr;
1313         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1314         Z_InitResponse *resp = apdu->u.initResponse;
1315
1316         int i;
1317         static const int masks[] = {
1318             Z_Options_search,
1319             Z_Options_present,
1320             -1
1321         };
1322         for (i = 0; masks[i] != -1; i++)
1323             if (ODR_MASK_GET(req->options, masks[i]))
1324                 ODR_MASK_SET(resp->options, masks[i]);
1325
1326         static const int versions[] = {
1327             Z_ProtocolVersion_1,
1328             Z_ProtocolVersion_2,
1329             Z_ProtocolVersion_3,
1330             -1
1331         };
1332         for (i = 0; versions[i] != -1; i++)
1333             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1334                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1335             else
1336                 break;
1337
1338         *resp->preferredMessageSize = *req->preferredMessageSize;
1339         *resp->maximumRecordSize = *req->maximumRecordSize;
1340
1341         package.response() = apdu;
1342         f->m_is_virtual = true;
1343     }
1344     else
1345         package.move();
1346
1347     release_frontend(package);
1348 }
1349
1350
1351 static mp::filter::Base* filter_creator()
1352 {
1353     return new mp::filter::Zoom;
1354 }
1355
1356 extern "C" {
1357     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1358         0,
1359         "zoom",
1360         filter_creator
1361     };
1362 }
1363
1364
1365 /*
1366  * Local variables:
1367  * c-basic-offset: 4
1368  * c-file-style: "Stroustrup"
1369  * indent-tabs-mode: nil
1370  * End:
1371  * vim: shiftwidth=4 tabstop=8 expandtab
1372  */
1373