X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=rset%2Frsisam.c;h=84b143bc5d839f84f5c38d4287aa4809209782a9;hb=32b696776940a403bb314ca72bb355a48ae97c21;hp=21df0ac7bd6d3afccb3bef13e54dc50a3706c0ec;hpb=b879b04a092d5b00cc866cf16f755e55053d2e89;p=idzebra-moved-to-github.git diff --git a/rset/rsisam.c b/rset/rsisam.c index 21df0ac..84b143b 100644 --- a/rset/rsisam.c +++ b/rset/rsisam.c @@ -1,107 +1,153 @@ -/* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. - * Sebastian Hammer, Adam Dickmeiss - * - * $Log: rsisam.c,v $ - * Revision 1.5 1995-09-04 12:33:56 adam - * Various cleanup. YAZ util used instead. - * - * Revision 1.4 1995/09/04 09:10:55 adam - * Minor changes. - * - * Revision 1.3 1994/11/22 13:15:37 quinn - * Simple - * - * Revision 1.2 1994/11/04 14:53:12 quinn - * Work - * - */ - -/* TODO: Memory management - LINK DELETE TO CLOSE! */ +/* $Id: rsisam.c,v 1.24 2004-01-16 15:27:35 heikki Exp $ + Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002 + Index Data Aps + +This file is part of the Zebra server. + +Zebra 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, or (at your option) any later +version. + +Zebra 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 Zebra; see the file LICENSE.zebra. If not, write to the +Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA +02111-1307, USA. +*/ + #include +#include +#include #include -#include - -static rset_control *r_create(const struct rset_control *sel, void *parms); -static int r_open(rset_control *ct, int wflag); -static void r_close(rset_control *ct); -static void r_delete(rset_control *ct); -static void r_rewind(rset_control *ct); -static int r_count(rset_control *ct); -static int r_read(); -static int r_write(); - -static const rset_control control = + +static void *r_create(RSET ct, const struct rset_control *sel, void *parms); +static RSFD r_open (RSET ct, int flag); +static void r_close (RSFD rfd); +static void r_delete (RSET ct); +static void r_rewind (RSFD rfd); +static int r_count (RSET ct); +static int r_read (RSFD rfd, void *buf, int *term_index); +static int r_write (RSFD rfd, const void *buf); + +static const struct rset_control control = { - "ISAM set type", - 0, + "isam", r_create, r_open, r_close, r_delete, r_rewind, + rset_default_forward, r_count, r_read, - r_write + r_write, }; -const rset_control *rset_kind_isam = &control; +const struct rset_control *rset_kind_isam = &control; + +struct rset_ispt_info { + ISPT pt; + struct rset_ispt_info *next; + struct rset_isam_info *info; +}; + +struct rset_isam_info { + ISAM is; + ISAM_P pos; + struct rset_ispt_info *ispt_list; +}; -static rset_control *r_create(const struct rset_control *sel, void *parms) +static void *r_create(RSET ct, const struct rset_control *sel, void *parms) { - rset_control *newct; - rset_isam_parms *pt = parms; - - logf (LOG_DEBUG, "risam_create(%s)", sel->desc); - newct = xmalloc(sizeof(*newct)); - memcpy(newct, sel, sizeof(*sel)); - if (!(newct->buf = (char*) is_position(pt->is, pt->pos))) - return 0; - return newct; + rset_isam_parms *pt = (rset_isam_parms *) parms; + struct rset_isam_info *info; + + ct->flags |= RSET_FLAG_VOLATILE; + info = (struct rset_isam_info *) xmalloc (sizeof(struct rset_isam_info)); + info->is = pt->is; + info->pos = pt->pos; + info->ispt_list = NULL; + + ct->no_rset_terms = 1; + ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms)); + ct->rset_terms[0] = pt->rset_term; + return info; } -static int r_open(rset_control *ct, int wflag) +RSFD r_open (RSET ct, int flag) { + struct rset_isam_info *info = (struct rset_isam_info *) ct->buf; + struct rset_ispt_info *ptinfo; + logf (LOG_DEBUG, "risam_open"); - if (wflag) + if (flag & RSETF_WRITE) { logf (LOG_FATAL, "ISAM set type is read-only"); - return -1; + return NULL; } - r_rewind(ct); - return 0; + ptinfo = (struct rset_ispt_info *) xmalloc (sizeof(*ptinfo)); + ptinfo->next = info->ispt_list; + info->ispt_list = ptinfo; + ptinfo->pt = is_position (info->is, info->pos); + ptinfo->info = info; + + if (ct->rset_terms[0]->nn < 0) + ct->rset_terms[0]->nn = is_numkeys (ptinfo->pt); + return ptinfo; } -static void r_close(rset_control *ct) +static void r_close (RSFD rfd) { - /* NOP */ + struct rset_isam_info *info = ((struct rset_ispt_info*) rfd)->info; + struct rset_ispt_info **ptinfop; + + for (ptinfop = &info->ispt_list; *ptinfop; ptinfop = &(*ptinfop)->next) + if (*ptinfop == rfd) + { + is_pt_free ((*ptinfop)->pt); + *ptinfop = (*ptinfop)->next; + xfree (rfd); + return; + } + logf (LOG_FATAL, "r_close but no rfd match!"); + assert (0); } -static void r_delete(rset_control *ct) +static void r_delete (RSET ct) { - logf (LOG_DEBUG, "risam_delete"); - is_pt_free((ISPT) ct->buf); - xfree(ct); + struct rset_isam_info *info = (struct rset_isam_info *) ct->buf; + + logf (LOG_DEBUG, "rsisam_delete"); + assert (info->ispt_list == NULL); + rset_term_destroy (ct->rset_terms[0]); + xfree (ct->rset_terms); + xfree (info); } -static void r_rewind(rset_control *ct) -{ - logf (LOG_DEBUG, "risam_rewind"); - is_rewind((ISPT) ct->buf); +static void r_rewind (RSFD rfd) +{ + logf (LOG_DEBUG, "rsisam_rewind"); + is_rewind( ((struct rset_ispt_info*) rfd)->pt); } -static int r_count(rset_control *ct) -{return 0;} +static int r_count (RSET ct) +{ + return 0; +} -static int r_read(rset_control *ct, void *buf) +static int r_read (RSFD rfd, void *buf, int *term_index) { - return is_readkey((ISPT) ct->buf, buf); + *term_index = 0; + return is_readkey( ((struct rset_ispt_info*) rfd)->pt, buf); } -static int r_write() +static int r_write (RSFD rfd, const void *buf) { logf (LOG_FATAL, "ISAM set type is read-only"); return -1;