opscfl.c
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上传日期:2007-01-07
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文件大小:2k
- /*
- * opscfl.c - Open scanning by a filter
- * Kernel of GNU SQL-server
- *
- * This file is a part of GNU SQL Server
- *
- * Copyright (c) 1996, 1997, Free Software Foundation, Inc
- * Developed at the Institute of System Programming
- * This file is written by Vera Ponomarenko
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Contacts: gss@ispras.ru
- *
- */
- /* $Id: opscfl.c,v 1.247 1997/04/17 11:03:20 vera Exp $ */
- #include "fdcltrn.h"
- #include "destrn.h"
- #include "strml.h"
- extern i2_t maxscan;
- extern char **scptab;
- extern struct des_nseg desnseg;
- u2_t
- opscfl (i4_t idfl, i4_t mode, u2_t fn, u2_t * fl,
- u2_t slsz, char *sc, u2_t fmn, u2_t * fml)
- {
- u2_t fnt, fdf;
- struct des_fltr *desfl;
- struct d_r_t *desrel;
- struct d_sc_f *scfl;
- struct des_field *df;
- i2_t n;
- if ((u2_t) idfl > desnseg.mtobnum)
- return (NIOB);
- desfl = (struct des_fltr *) * (desnseg.tobtab + idfl);
- if (desfl == NULL)
- return (NIOB);
- if (((struct prtob *) desfl)->prob != FLTR)
- return (NIOB);
- desrel = desfl->pdrtf;
- fnt = desrel->desrbd.fieldnum;
- fdf = desrel->desrbd.fdfnum;
- df = (struct des_field *) (desrel + 1);
- if (testcond (df, fnt, fdf, fn, fl, &slsz, sc, fmn, fml) != OK)
- return (NCF);
- scfl = (struct d_sc_f *) lusc (&n, scfsize, (char *) desfl, SCF,
- mode, fn, fl, sc, slsz, fmn, fml, 0);
- scfl->pnf = desfl->tobfl.firstpn;
- scfl->offf = phfsize;
- scfl->mpnf = (u2_t) ~ 0;
- scfl->mofff = 0;
- return (n);
- }