2003-07-21 18:27:44 +08:00
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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 <errno.h>
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#include <stdlib.h>
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#include <string.h>
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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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typedef struct {
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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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DictExample *d = (DictExample*)malloc( sizeof(DictExample) );
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if ( !d )
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2003-07-25 01:52:50 +08:00
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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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2003-07-21 18:27:44 +08:00
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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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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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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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char **res=palloc(sizeof(char*)*2);
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if ( *txt=='\0' || searchstoplist(&(d->stoplist),txt) ) {
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pfree(txt);
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res[0]=NULL;
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} else
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res[0]=txt;
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res[1]=NULL;
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PG_RETURN_POINTER(res);
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}
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