66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
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/*-------------------------------------------------------------------------
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*
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* dict_simple.c
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* Simple dictionary: just lowercase and check for stopword
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*
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* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/tsearch/dict_simple.c,v 1.1 2007/08/21 01:11:18 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "tsearch/ts_locale.h"
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#include "tsearch/ts_public.h"
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#include "tsearch/ts_utils.h"
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#include "utils/builtins.h"
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typedef struct
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{
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StopList stoplist;
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} DictExample;
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Datum
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dsimple_init(PG_FUNCTION_ARGS)
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{
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DictExample *d = (DictExample *) palloc0(sizeof(DictExample));
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d->stoplist.wordop = recode_and_lowerstr;
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if (!PG_ARGISNULL(0) && PG_GETARG_POINTER(0) != NULL)
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{
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text *in = PG_GETARG_TEXT_P(0);
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char *filename = TextPGetCString(in);
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readstoplist(filename, &d->stoplist);
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sortstoplist(&d->stoplist);
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pfree(filename);
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}
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PG_RETURN_POINTER(d);
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}
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Datum
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dsimple_lexize(PG_FUNCTION_ARGS)
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{
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DictExample *d = (DictExample *) PG_GETARG_POINTER(0);
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char *in = (char *) PG_GETARG_POINTER(1);
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int32 len = PG_GETARG_INT32(2);
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char *txt = lowerstr_with_len(in, len);
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TSLexeme *res = palloc0(sizeof(TSLexeme) * 2);
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if (*txt == '\0' || searchstoplist(&(d->stoplist), txt))
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{
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pfree(txt);
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}
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else
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res[0].lexeme = txt;
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PG_RETURN_POINTER(res);
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}
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