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/*
* ISpell interface
* Teodor Sigaev <[email protected]>
*/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "postgres.h"
#include "dict.h"
#include "common.h"
#include "ispell/spell.h"
typedef struct {
StopList stoplist;
IspellDict obj;
} DictISpell;
PG_FUNCTION_INFO_V1(spell_init);
Datum spell_init(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(spell_lexize);
Datum spell_lexize(PG_FUNCTION_ARGS);
static void
freeDictISpell(DictISpell *d) {
FreeIspell(&(d->obj));
freestoplist(&(d->stoplist));
free(d);
}
Datum
spell_init(PG_FUNCTION_ARGS) {
DictISpell *d;
Map *cfg, *pcfg;
text *in;
bool affloaded=false, dictloaded=false, stoploaded=false;
if ( PG_ARGISNULL(0) || PG_GETARG_POINTER(0)==NULL )
elog(ERROR,"ISpell confguration error");
d = (DictISpell*)malloc( sizeof(DictISpell) );
if ( !d )
elog(ERROR, "No memory");
memset(d,0,sizeof(DictISpell));
d->stoplist.wordop=lowerstr;
in = PG_GETARG_TEXT_P(0);
parse_cfgdict(in,&cfg);
PG_FREE_IF_COPY(in, 0);
pcfg=cfg;
while(pcfg->key) {
if ( strcasecmp("DictFile", pcfg->key) == 0 ) {
if ( dictloaded ) {
freeDictISpell(d);
elog(ERROR,"Dictionary already loaded");
}
if ( ImportDictionary(&(d->obj), pcfg->value) ) {
freeDictISpell(d);
elog(ERROR,"Can't load dictionary file (%s)", pcfg->value);
}
dictloaded=true;
} else if ( strcasecmp("AffFile", pcfg->key) == 0 ) {
if ( affloaded ) {
freeDictISpell(d);
elog(ERROR,"Affixes already loaded");
}
if ( ImportAffixes(&(d->obj), pcfg->value) ) {
freeDictISpell(d);
elog(ERROR,"Can't load affix file (%s)", pcfg->value);
}
affloaded=true;
} else if ( strcasecmp("StopFile", pcfg->key) == 0 ) {
text *tmp=char2text(pcfg->value);
if ( stoploaded ) {
freeDictISpell(d);
elog(ERROR,"Stop words already loaded");
}
readstoplist(tmp, &(d->stoplist));
sortstoplist(&(d->stoplist));
pfree(tmp);
stoploaded=true;
} else {
freeDictISpell(d);
elog(ERROR,"Unknown option: %s => %s", pcfg->key, pcfg->value);
}
pfree(pcfg->key);
pfree(pcfg->value);
pcfg++;
}
pfree(cfg);
if ( affloaded && dictloaded ) {
SortDictionary(&(d->obj));
SortAffixes(&(d->obj));
} else if ( !affloaded ) {
freeDictISpell(d);
elog(ERROR,"No affixes");
} else {
freeDictISpell(d);
elog(ERROR,"No dictionary");
}
PG_RETURN_POINTER(d);
}
Datum
spell_lexize(PG_FUNCTION_ARGS) {
DictISpell *d = (DictISpell*)PG_GETARG_POINTER(0);
char *in = (char*)PG_GETARG_POINTER(1);
char *txt;
char **res;
char **ptr, **cptr;
if ( !PG_GETARG_INT32(2) )
PG_RETURN_POINTER(NULL);
res=palloc(sizeof(char*)*2);
txt = pnstrdup(in, PG_GETARG_INT32(2));
res=NormalizeWord(&(d->obj), txt);
pfree(txt);
if ( res==NULL )
PG_RETURN_POINTER(NULL);
ptr=cptr=res;
while(*ptr) {
if ( searchstoplist(&(d->stoplist),*ptr) ) {
pfree(*ptr);
*ptr=NULL;
ptr++;
} else {
*cptr=*ptr;
cptr++; ptr++;
}
}
*cptr=NULL;
PG_RETURN_POINTER(res);
}
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