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/*-------------------------------------------------------------------------
*
* ts_public.h
* Public interface to various tsearch modules, such as
* parsers and dictionaries.
*
* Copyright (c) 1998-2011, PostgreSQL Global Development Group
*
* src/include/tsearch/ts_public.h
*
*-------------------------------------------------------------------------
*/
#ifndef _PG_TS_PUBLIC_H_
#define _PG_TS_PUBLIC_H_
#include "tsearch/ts_type.h"
/*
* Parser's framework
*/
/*
* returning type for prslextype method of parser
*/
typedef struct
{
int lexid;
char *alias;
char *descr;
} LexDescr;
/*
* Interface to headline generator
*/
typedef struct
{
uint32 selected:1,
in:1,
replace:1,
repeated:1,
skip:1,
unused:3,
type:8,
len:16;
char *word;
QueryOperand *item;
} HeadlineWordEntry;
typedef struct
{
HeadlineWordEntry *words;
int4 lenwords;
int4 curwords;
char *startsel;
char *stopsel;
char *fragdelim;
int2 startsellen;
int2 stopsellen;
int2 fragdelimlen;
} HeadlineParsedText;
/*
* Common useful things for tsearch subsystem
*/
extern char *get_tsearch_config_filename(const char *basename,
const char *extension);
/*
* Often useful stopword list management
*/
typedef struct
{
int len;
char **stop;
} StopList;
extern void readstoplist(const char *fname, StopList *s,
char *(*wordop) (const char *));
extern bool searchstoplist(StopList *s, char *key);
/*
* Interface with dictionaries
*/
/* return struct for any lexize function */
typedef struct
{
/*
* number of variant of split word , for example Word 'fotballklubber'
* (norwegian) has two varian to split: ( fotball, klubb ) and ( fot,
* ball, klubb ). So, dictionary should return: nvariant lexeme 1 fotball
* 1 klubb 2 fot 2 ball 2 klubb
*/
uint16 nvariant;
uint16 flags;
/* C-string */
char *lexeme;
} TSLexeme;
#define TSL_ADDPOS 0x01
#define TSL_PREFIX 0x02
#define TSL_FILTER 0x04
/*
* Struct for supporting complex dictionaries like thesaurus.
* 4th argument for dictlexize method is a pointer to this
*/
typedef struct
{
bool isend; /* in: marks for lexize_info about text end is
* reached */
bool getnext; /* out: dict wants next lexeme */
void *private_state; /* internal dict state between calls with
* getnext == true */
} DictSubState;
#endif /* _PG_TS_PUBLIC_H_ */
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