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Tsearch2 functionality migrates to core. The bulk of this work is by

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Oleg Bartunov and Teodor Sigaev, but I did a lot of editorializing,
so anything that's broken is probably my fault.

Documentation is nonexistent as yet, but let's land the patch so we can
get some portability testing done.
This commit is contained in:
Tom Lane
2007-08-21 01:11:32 +00:00
parent 4e94d1f952
commit 140d4ebcb4
200 changed files with 54388 additions and 147 deletions
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65
src/backend/tsearch/dict_simple.c Normal file
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@@ -0,0 +1,65 @@
/*-------------------------------------------------------------------------
*
* 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);
}