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69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
/* $PostgreSQL: pgsql/contrib/tsearch2/dict_ex.c,v 1.8 2006/03/11 04:38:30 momjian Exp $ */
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/*
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* example of dictionary
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* Teodor Sigaev <teodor@sigaev.ru>
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*/
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#include "postgres.h"
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#include "dict.h"
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#include "common.h"
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#include "ts_locale.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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PG_FUNCTION_INFO_V1(dex_init);
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Datum dex_init(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1(dex_lexize);
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Datum dex_lexize(PG_FUNCTION_ARGS);
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Datum
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dex_init(PG_FUNCTION_ARGS)
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{
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DictExample *d = (DictExample *) malloc(sizeof(DictExample));
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if (!d)
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ereport(ERROR,
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(errcode(ERRCODE_OUT_OF_MEMORY),
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errmsg("out of memory")));
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memset(d, 0, sizeof(DictExample));
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d->stoplist.wordop = 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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readstoplist(in, &(d->stoplist));
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sortstoplist(&(d->stoplist));
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PG_FREE_IF_COPY(in, 0);
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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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dex_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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char *txt = pnstrdup(in, PG_GETARG_INT32(2));
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TSLexeme *res = palloc(sizeof(TSLexeme) * 2);
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memset(res, 0, 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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