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/*-------------------------------------------------------------------------
*
* dict_ispell.c
* Ispell dictionary interface
*
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
*
*
* IDENTIFICATION
* src/backend/tsearch/dict_ispell.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "commands/defrem.h"
#include "tsearch/dicts/spell.h"
#include "tsearch/ts_locale.h"
#include "tsearch/ts_utils.h"
typedef struct
{
StopList stoplist;
IspellDict obj;
} DictISpell;
Datum
dispell_init(PG_FUNCTION_ARGS)
{
List *dictoptions = (List *) PG_GETARG_POINTER(0);
DictISpell *d;
bool affloaded = false,
dictloaded = false,
stoploaded = false;
ListCell *l;
d = (DictISpell *) palloc0(sizeof(DictISpell));
NIStartBuild(&(d->obj));
foreach(l, dictoptions)
{
DefElem *defel = (DefElem *) lfirst(l);
if (pg_strcasecmp(defel->defname, "DictFile") == 0)
{
if (dictloaded)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("multiple DictFile parameters")));
NIImportDictionary(&(d->obj),
get_tsearch_config_filename(defGetString(defel),
"dict"));
dictloaded = true;
}
else if (pg_strcasecmp(defel->defname, "AffFile") == 0)
{
if (affloaded)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("multiple AffFile parameters")));
NIImportAffixes(&(d->obj),
get_tsearch_config_filename(defGetString(defel),
"affix"));
affloaded = true;
}
else if (pg_strcasecmp(defel->defname, "StopWords") == 0)
{
if (stoploaded)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("multiple StopWords parameters")));
readstoplist(defGetString(defel), &(d->stoplist), lowerstr);
stoploaded = true;
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unrecognized Ispell parameter: \"%s\"",
defel->defname)));
}
}
if (affloaded && dictloaded)
{
NISortDictionary(&(d->obj));
NISortAffixes(&(d->obj));
}
else if (!affloaded)
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("missing AffFile parameter")));
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("missing DictFile parameter")));
}
NIFinishBuild(&(d->obj));
PG_RETURN_POINTER(d);
}
Datum
dispell_lexize(PG_FUNCTION_ARGS)
{
DictISpell *d = (DictISpell *) PG_GETARG_POINTER(0);
char *in = (char *) PG_GETARG_POINTER(1);
int32 len = PG_GETARG_INT32(2);
char *txt;
TSLexeme *res;
TSLexeme *ptr,
*cptr;
if (len <= 0)
PG_RETURN_POINTER(NULL);
txt = lowerstr_with_len(in, len);
res = NINormalizeWord(&(d->obj), txt);
if (res == NULL)
PG_RETURN_POINTER(NULL);
ptr = cptr = res;
while (ptr->lexeme)
{
if (searchstoplist(&(d->stoplist), ptr->lexeme))
{
pfree(ptr->lexeme);
ptr->lexeme = NULL;
ptr++;
}
else
{
memcpy(cptr, ptr, sizeof(TSLexeme));
cptr++;
ptr++;
}
}
cptr->lexeme = NULL;
PG_RETURN_POINTER(res);
}
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