1 /* This file is part of the Zebra server.
2 Copyright (C) 1994-2011 Index Data
4 Zebra 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
9 Zebra 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
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
24 Most functions has return type ZEBRA_RES, where ZEBRA_FAIL indicates
25 failure; ZEBRA_OK indicates success.
32 #include <yaz/proto.h>
33 #include <idzebra/res.h>
34 #include <idzebra/version.h>
35 #include <idzebra/recctrl.h>
46 } ZebraTransactionStatus;
48 /** Retrieval Record Descriptor */
50 int errCode; /* non-zero if error when fetching this */
51 char *errString; /* error string */
52 int position; /* position of record in result set (1,2,..) */
53 char *buf; /* record buffer (void pointer really) */
55 const Odr_oid *format; /* record syntax */
59 } ZebraRetrievalRecord;
61 /** Scan Term Descriptor */
63 zint occurrences; /* scan term occurrences */
64 char *term; /* scan term string */
65 char *display_term; /* display scan term entry */
69 \brief a Zebra Handle - (session)
71 typedef struct zebra_session *ZebraHandle;
74 \brief a Zebra Service handle
76 typedef struct zebra_service *ZebraService;
78 /** \brief Creates a Zebra Service.
79 \param configName name of configuration file
81 This function is a simplified version of zebra_start_res.
84 ZebraService zebra_start(const char *configName
85 ) ZEBRA_GCC_ATTR((warn_unused_result));
87 /** \brief Creates a Zebra service with resources.
88 \param configName name of configuration file
89 \param def_res default resources
90 \param over_res overriding resources
92 This function typically called once in a program. A Zebra Service
93 acts as a factory for Zebra session handles.
96 ZebraService zebra_start_res(const char *configName,
97 Res def_res, Res over_res
98 ) ZEBRA_GCC_ATTR((warn_unused_result));
100 /** \brief stops a Zebra service.
101 \param zs service handle
103 Frees resources used by the service.
106 ZEBRA_RES zebra_stop(ZebraService zs);
108 /** \brief Lists enabled Zebra filters
109 \param zs service handle
110 \param cd callback parameter (opaque)
111 \param cb callback function
114 void zebra_filter_info(ZebraService zs, void *cd,
115 void (*cb)(void *cd, const char *name));
118 /** \brief Creates a Zebra session handle within service.
119 \param zs service handle.
120 \param res resources to be used for the service (NULL for none)
122 There should be one handle for each thread doing something
123 with zebra, be that searching or indexing. In simple apps
124 one handle is sufficient
127 ZebraHandle zebra_open(ZebraService zs, Res res
128 ) ZEBRA_GCC_ATTR((warn_unused_result));
130 /** \brief Destroys Zebra session handle.
131 \param zh zebra session handle.
134 ZEBRA_RES zebra_close(ZebraHandle zh);
136 /** \brief Returns error code for last error
137 \param zh zebra session handle.
140 int zebra_errCode(ZebraHandle zh);
142 /** \brief Returns error string for last error
143 \param zh zebra session handle.
146 const char *zebra_errString(ZebraHandle zh);
148 /** \brief Returns additional info for last error
149 \param zh zebra session handle.
152 char *zebra_errAdd(ZebraHandle zh);
154 /** \brief Returns error code and additional info for last error
155 \param zh zebra session handle.
156 \param code pointer to returned error code
157 \param addinfo pointer to returned additional info
160 void zebra_result(ZebraHandle zh, int *code, char **addinfo);
163 /** \brief Returns character set encoding for session
164 \param zh zebra session handle.
165 \returns encoding name (e.g. "iso-8859-1")
168 const char *zebra_get_encoding(ZebraHandle zh);
170 /** \brief Set limit before Zebra does approx hit count
171 \param zh session handle
172 \param approx_limit the limit
174 Results will be approximiate if hit count is greater than the
175 limit specified. By default there is a high-limit (no limit).
177 ZEBRA_RES zebra_set_approx_limit(ZebraHandle zh, zint approx_limit);
179 /** \brief Search using PQF Query String
180 \param zh session handle
181 \param pqf_query query
182 \param setname name of resultset
183 \param hits of hits is returned
186 ZEBRA_RES zebra_search_PQF(ZebraHandle zh, const char *pqf_query,
187 const char *setname, zint *hits);
189 /** \brief Search using RPN Query structure (from ASN.1)
190 \param zh session handle
192 \param query RPN query using YAZ structure
193 \param setname name of resultset
194 \param hits number of hits is returned
195 \param estimated_hit_count whether hit count is an estimate
196 \param partial_resultset whether result is only partially evaluated
199 ZEBRA_RES zebra_search_RPN_x(ZebraHandle zh, ODR o, Z_RPNQuery *query,
200 const char *setname, zint *hits,
201 int *estimated_hit_count,
202 int *partial_resultset);
205 /** \brief Search using RPN Query structure (from ASN.1)
206 \param zh session handle
208 \param query RPN query using YAZ structure
209 \param setname name of resultset
210 \param hits number of hits is returned
213 ZEBRA_RES zebra_search_RPN(ZebraHandle zh, ODR o, Z_RPNQuery *query,
214 const char *setname, zint *hits);
216 /** \brief Retrieve records from result set (after search)
217 \param zh session handle
218 \param stream allocate records returned using this ODR
219 \param setname name of result set to retrieve records from
220 \param comp Z39.50 record composition
221 \param input_format transfer syntax (OID)
222 \param num_recs number of records to retrieve
223 \param recs store records in this structure (size is num_recs)
226 ZEBRA_RES zebra_records_retrieve(ZebraHandle zh, ODR stream,
228 Z_RecordComposition *comp,
229 const Odr_oid *input_format,
231 ZebraRetrievalRecord *recs);
232 /** \brief Deletes one or more resultsets
233 \param zh session handle
234 \param function Z_DeleteResultSetRequest_{list,all}
235 \param num_setnames number of result sets
236 \param setnames result set names
237 \param statuses status result
240 int zebra_deleteResultSet(ZebraHandle zh, int function,
241 int num_setnames, char **setnames,
245 /** \brief returns number of term info terms assocaited with result set
246 \param zh session handle
247 \param setname result set name
248 \param num_terms number of terms returned in this integer
250 This function is used in conjunction with zebra_result_set_term_info.
251 If operation was successful, ZEBRA_OK is returned; otherwise
252 ZEBRA_FAIL is returned (typically non-existing setname)
255 ZEBRA_RES zebra_result_set_term_no(ZebraHandle zh, const char *setname,
258 /** \brief returns information about a term assocated with a result set
259 \param zh session handle
260 \param setname result set name
261 \param no the term we want to know about (0=first, 1=second,..)
262 \param count the number of occurrences of this term, aka hits (output)
263 \param approx about hits: 0=exact,1=approx (output)
264 \param termbuf buffer for term string (intput, output)
265 \param termlen size of termbuf (input=max, output=actual length)
266 \param term_ref_id if non-NULL *term_ref_id holds term reference
268 Returns information about one search term associated with result set.
269 Use zebra_result_set_term_no to read total number of terms associated
270 with result set. If this function can not return information,
271 due to no out of range or bad result set name, ZEBRA_FAIL is
273 The passed termbuf must be able to hold at least *termlen characters.
274 Upon completion, *termlen holds actual length of search term.
277 ZEBRA_RES zebra_result_set_term_info(ZebraHandle zh, const char *setname,
278 int no, zint *count, int *approx,
279 char *termbuf, size_t *termlen,
280 const char **term_ref_id);
283 /** \brief performs Scan (Z39.50 style)
284 \param zh session handle
285 \param stream ODR handle for result
286 \param zapt Attribute plus Term (start term)
287 \param attributeset Attributeset for Attribute plus Term
288 \param position input/output position
289 \param num_entries number of terms requested / returned
290 \param entries list of resulting terms (ODR allocated)
291 \param is_partial upon return 1=partial, 0=complete
292 \param setname limit scan by this set (NULL means no limit)
294 YAZ_EXPORT ZEBRA_RES zebra_scan(ZebraHandle zh, ODR stream,
295 Z_AttributesPlusTerm *zapt,
296 const Odr_oid *attributeset,
297 int *position, int *num_entries,
298 ZebraScanEntry **entries,
300 const char *setname);
302 /** \brief performs Scan (taking PQF string)
303 \param zh session handle
304 \param stream ODR handle for result
305 \param query PQF scan query
306 \param position input/output position
307 \param num_entries number of terms requested / returned
308 \param entries list of resulting terms (ODR allocated)
309 \param is_partial upon return 1=partial, 0=complete
310 \param setname limit scan by this set (NULL means no limit)
313 ZEBRA_RES zebra_scan_PQF(ZebraHandle zh, ODR stream, const char *query,
314 int *position, int *num_entries,
315 ZebraScanEntry **entries,
316 int *is_partial, const char *setname);
318 /** \brief authenticate user. Returns 0 if OK, != 0 on failure
319 \param zh session handle
320 \param user user name
324 ZEBRA_RES zebra_auth(ZebraHandle zh, const char *user, const char *pass);
326 /** \brief Normalize zebra term for register (subject to change!)
327 \param zh session handle
328 \param index_type "w", "p",..
329 \param input_str input string buffer
330 \param input_len input string length
331 \param output_str output string buffer
332 \param output_len output string length
335 int zebra_string_norm(ZebraHandle zh, const char *index_type,
336 const char *input_str,
337 int input_len, char *output_str, int output_len);
339 /** \brief Creates a database
340 \param zh session handle
341 \param db database to be created
344 ZEBRA_RES zebra_create_database(ZebraHandle zh, const char *db);
346 /** \brief Deletes a database (drop)
347 \param zh session handle
348 \param db database to be deleted
351 ZEBRA_RES zebra_drop_database(ZebraHandle zh, const char *db);
354 ZEBRA_RES zebra_admin_shutdown(ZebraHandle zh);
357 ZEBRA_RES zebra_admin_start(ZebraHandle zh);
360 ZEBRA_RES zebra_shutdown(ZebraService zs);
363 ZEBRA_RES zebra_admin_import_begin(ZebraHandle zh, const char *database,
364 const char *record_type);
367 ZEBRA_RES zebra_admin_import_segment(ZebraHandle zh,
371 ZEBRA_RES zebra_admin_import_end(ZebraHandle zh);
374 ZEBRA_RES zebra_begin_trans(ZebraHandle zh, int rw
375 ) ZEBRA_GCC_ATTR((warn_unused_result));
378 ZEBRA_RES zebra_end_trans(ZebraHandle zh
379 ) ZEBRA_GCC_ATTR((warn_unused_result));
382 ZEBRA_RES zebra_end_transaction(ZebraHandle zh,
383 ZebraTransactionStatus *stat);
386 ZEBRA_RES zebra_commit(ZebraHandle zh);
389 ZEBRA_RES zebra_clean(ZebraHandle zh);
392 ZEBRA_RES zebra_init(ZebraHandle zh);
395 ZEBRA_RES zebra_compact(ZebraHandle zh);
398 ZEBRA_RES zebra_repository_index(ZebraHandle zh, const char *path,
399 enum zebra_recctrl_action_t action);
402 ZEBRA_RES zebra_repository_update(ZebraHandle zh, const char *path);
405 ZEBRA_RES zebra_repository_delete(ZebraHandle zh, const char *path);
408 ZEBRA_RES zebra_repository_show(ZebraHandle zh, const char *path);
410 /** \brief Simple update record
411 \param zh session handle
412 \param buf record buffer
413 \param buf_size record buffer size
415 This function is a simple wrapper or zebra_update_record with
416 action=action_update (insert or replace) .
419 ZEBRA_RES zebra_add_record(ZebraHandle zh, const char *buf, int buf_size);
421 /** \brief Updates record
422 \param zh session handle
423 \param action (insert,replace,delete or update (replace/insert)
424 \param recordType filter type (0 indicates default)
425 \param sysno system id (0 may be passed for no known id)
426 \param match match criteria (0 may be passed for no known criteria)
427 \param fname filename to be printed for logging (0 may be passed)
428 \param buf record buffer
429 \param buf_size record buffer size
432 ZEBRA_RES zebra_update_record(ZebraHandle zh,
433 enum zebra_recctrl_action_t action,
434 const char *recordType,
435 zint *sysno, const char *match,
437 const char *buf, int buf_size);
440 ZEBRA_RES zebra_sort(ZebraHandle zh, ODR stream,
441 int num_input_setnames,
442 const char **input_setnames,
443 const char *output_setname,
444 Z_SortKeySpecList *sort_sequence,
446 ) ZEBRA_GCC_ATTR((warn_unused_result));
449 ZEBRA_RES zebra_select_databases(ZebraHandle zh, int num_bases,
450 const char **basenames
451 ) ZEBRA_GCC_ATTR((warn_unused_result));
454 ZEBRA_RES zebra_select_database(ZebraHandle zh, const char *basename
455 ) ZEBRA_GCC_ATTR((warn_unused_result));
458 void zebra_shadow_enable(ZebraHandle zh, int value);
461 int zebra_register_statistics(ZebraHandle zh, int dumpdict);
464 ZEBRA_RES zebra_record_encoding(ZebraHandle zh, const char *encoding);
467 ZEBRA_RES zebra_octet_term_encoding(ZebraHandle zh, const char *encoding);
471 void zebra_set_resource(ZebraHandle zh, const char *name, const char *value);
473 const char *zebra_get_resource(ZebraHandle zh,
474 const char *name, const char *defaultvalue);
478 void zebra_pidfname(ZebraService zs, char *path);
488 ZebraMetaRecord *zebra_meta_records_create(ZebraHandle zh,
490 int num, zint *positions);
494 ZebraMetaRecord *zebra_meta_records_create_range(ZebraHandle zh,
496 zint start, int num);
499 void zebra_meta_records_destroy(ZebraHandle zh, ZebraMetaRecord *records,
503 struct BFiles_struct *zebra_get_bfs(ZebraHandle zh);
506 ZEBRA_RES zebra_set_limit(ZebraHandle zh, int complement_flag, zint *ids);
509 ZEBRA_RES zebra_set_break_handler(ZebraHandle zh,
510 int (*f)(void *client_data),
514 ZEBRA_RES zebra_register_check(ZebraHandle zh, const char *spec);
520 * \section intro_sec Introduction
522 * Zebra is a search engine for structure data, such as XML, MARC
525 * API users should read the api.h for all the public definitions.
527 * The remaining sections briefly describe each of
528 * Zebra major modules/components.
530 * \section util Base Utilities
532 * The Zebra utilities (util.h) defines fundamental types and a few
533 * utilites for Zebra.
535 * \section res Resources
537 * The resources system (res.h) is a manager of configuration
538 * resources. The resources can be viewed as a simple database.
539 * Resources can be read from a configurtion file, they can be
540 * read or written by an application. Resources can also be written,
541 * but that facility is not currently in use.
543 * \section bfile Bfiles
545 * The Bfiles (bfile.h) provides a portable interface to the
546 * local file system. It also provides a facility for safe updates
547 * (shadow updates). All file system access is handle by this module
548 * (except for trival reads of configuration files).
550 * \section dict Dictionary
552 * The Zebra dictionary (dict.h) maps a search term (key) to a value. The
553 * value is a reference to the list of records identifers in which
554 * the term occurs. Zebra uses an ISAM data structure for the list
555 * of term occurrences. The Dictionary uses \ref bfile.
559 * Zebra maintains an ISAM for each term where each ISAM is a list
560 * of record identifiers corresponding to the records in which the
561 * term occur. Unlike traditional ISAM systems, the Zebra ISAM
562 * is compressed. The ISAM system uses \ref bfile.
564 * Zebra has more than one ISAM system. The old and stable ISAM system
565 * is named isamc (see isamc.h). Another version isams is a write-once
566 * isam system that is quite compact - suitable for CD-ROMs (isams.h).
567 * The newest ISAM system, isamb, is implemented as a B-Tree (see isamb.h).
569 * \section data1 Data-1
571 * The data1 (data1.h) module deals with structured documents. The module can
572 * can read, modify and write documents. The document structure was
573 * originally based on GRS-1 - a Z39.50 v3 structure that predates
574 * DOM. These days the data1 structure may describe XML/SGML as well.
575 * The data1, like DOM, is a tree structure. Each node in the tree
576 * can be of type element, text (cdata), preprocessing instruction,
577 * comment. Element nodes can point to attribute nodes.
579 * \section recctrl Record Control
581 * The record control module (recctrl.h) is responsible for
582 * managing the various record types ("classes" or filters).
584 * \section rset Result-Set
586 * The Result-Set module (rset.h) defines an interface that all
587 * Zebra Search Results must implement. Each operation (AND, OR, ..)
588 * correspond to an implementation of that interface.
592 * DFA (dfa.h) Deterministic Finite Automa is a regular expression engine.
593 * The module compiles a regular expression to a DFA. The DFA can then
594 * be used in various application to perform fast match against the
595 * origianl expression. The \ref Dict uses DFA to perform lookup
596 * using regular expressions.
603 * c-file-style: "Stroustrup"
604 * indent-tabs-mode: nil
606 * vim: shiftwidth=4 tabstop=8 expandtab