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