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/*------------------------------------------------------------------------- * * ts_public.h * Public interface to various tsearch modules, such as * parsers and dictionaries. * * Copyright (c) 1998-2012, 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 current variant of split word. For example the Norwegian * word 'fotballklubber' has two variants to split: ( fotball, klubb ) * and ( fot, ball, klubb ). So, dictionary should return: * * nvariant lexeme * 1 fotball * 1 klubb * 2 fot * 2 ball * 2 klubb * * In general, a TSLexeme will be considered to belong to the same split * variant as the previous one if they have the same nvariant value. * The exact values don't matter, only changes from one lexeme to next. *---------- */ uint16 nvariant; uint16 flags; /* See flag bits below */ char *lexeme; /* C string */ } TSLexeme; /* Flag bits that can appear in TSLexeme.flags */ #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_ */