X-Git-Url: http://git.indexdata.com/?p=idzebra-moved-to-github.git;a=blobdiff_plain;f=rset%2Frsnull.c;h=4e9cc70de764d02207ec9dac47cda04748f9781f;hp=94d9be89e214fc4c5d55d72811ff3ff70762d988;hb=HEAD;hpb=5402489b101b792e481ffad68ee0e7c449012fb4 diff --git a/rset/rsnull.c b/rset/rsnull.c index 94d9be8..4e9cc70 100644 --- a/rset/rsnull.c +++ b/rset/rsnull.c @@ -1,142 +1,100 @@ -/* - * Copyright (C) 1994-1999, Index Data - * All rights reserved. - * Sebastian Hammer, Adam Dickmeiss - * - * $Log: rsnull.c,v $ - * Revision 1.13 2002-03-21 10:25:42 adam - * use lockDir. Fixes for searchResult for null/sort sets - * - * Revision 1.12 1999/05/26 07:49:14 adam - * C++ compilation. - * - * Revision 1.11 1999/02/02 14:51:36 adam - * Updated WIN32 code specific sections. Changed header. - * - * Revision 1.10 1998/03/05 08:36:28 adam - * New result set model. - * - * Revision 1.9 1997/12/18 10:54:25 adam - * New method result set method rs_hits that returns the number of - * hits in result-set (if known). The ranked result set returns real - * number of hits but only when not combined with other operands. - * - * Revision 1.8 1996/10/29 13:55:24 adam - * Include of zebrautl.h instead of alexutil.h. - * - * Revision 1.7 1995/12/11 09:15:25 adam - * New set types: sand/sor/snot - ranked versions of and/or/not in - * ranked/semi-ranked result sets. - * Note: the snot not finished yet. - * New rset member: flag. - * Bug fix: r_delete in rsrel.c did free bad memory block. - * - * Revision 1.6 1995/10/12 12:41:57 adam - * Private info (buf) moved from struct rset_control to struct rset. - * Bug fixes in relevance. - * - * Revision 1.5 1995/10/10 14:00:04 adam - * Function rset_open changed its wflag parameter to general flags. - * - * Revision 1.4 1995/10/06 14:38:06 adam - * New result set method: r_score. - * Local no (sysno) and score is transferred to retrieveCtrl. - * - * Revision 1.3 1995/09/08 14:52:42 adam - * Work on relevance feedback. - * - * Revision 1.2 1995/09/07 13:58:43 adam - * New parameter: result-set file descriptor (RSFD) to support multiple - * positions within the same result-set. - * Boolean operators: and, or, not implemented. - * - * Revision 1.1 1995/09/06 10:35:44 adam - * Null set implemented. - * - */ +/* This file is part of the Zebra server. + Copyright (C) Index Data + +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 this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ + +#if HAVE_CONFIG_H +#include +#endif #include -#include -#include +#include +#include +#include -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 RSFD r_open(RSET ct, int flag); +static void r_close(RSFD rfd); +static void r_delete(RSET ct); +static void r_pos(RSFD rfd, double *current, double *total); +static int r_read(RSFD rfd, void *buf, TERMID *term); -static const struct rset_control control = +static const struct rset_control control = { "null", - r_create, + r_delete, + rset_get_one_term, r_open, r_close, - r_delete, - r_rewind, - r_count, + 0, /* no forward */ + r_pos, r_read, - r_write, + rset_no_write, }; -const struct rset_control *rset_kind_null = &control; - -static void *r_create(RSET ct, const struct rset_control *sel, void *parms) +RSET rset_create_null(NMEM nmem, struct rset_key_control *kcontrol, + TERMID term) { - rset_null_parms *null_parms = (rset_null_parms *) parms; - - ct->no_rset_terms = 1; - ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms)); - if (parms && null_parms->rset_term) - ct->rset_terms[0] = null_parms->rset_term; - else - ct->rset_terms[0] = rset_term_create ("term", -1, "rank-0"); - ct->rset_terms[0]->nn = 0; - - return NULL; + RSET rnew = rset_create_base(&control, nmem, kcontrol, 0, term, 0, 0); + rnew->priv = 0; + return rnew; } -static RSFD r_open (RSET ct, int flag) +static RSFD r_open(RSET ct, int flag) { + RSFD rfd; if (flag & RSETF_WRITE) { - logf (LOG_FATAL, "NULL set type is read-only"); - return NULL; + yaz_log (YLOG_FATAL, "NULL set type is read-only"); + return NULL; } - return ""; + rfd = rfd_create_base(ct); + rfd->priv = 0; + return rfd; } -static void r_close (RSFD rfd) +static void r_close(RSFD rfd) { } -static void r_delete (RSET ct) +static void r_delete(RSET ct) { - rset_term_destroy (ct->rset_terms[0]); - xfree (ct->rset_terms); } -static void r_rewind (RSFD rfd) +static void r_pos(RSFD rfd, double *current, double *total) { - logf (LOG_DEBUG, "rsnull_rewind"); -} - -static int r_count (RSET ct) -{ - return 0; + assert(rfd); + assert(current); + assert(total); + *total = 0; + *current = 0; } -static int r_read (RSFD rfd, void *buf, int *term_index) +static int r_read(RSFD rfd, void *buf, TERMID *term) { - *term_index = -1; + if (term) + *term = 0; return 0; } -static int r_write (RSFD rfd, const void *buf) -{ - logf (LOG_FATAL, "NULL set type is read-only"); - return -1; -} +/* + * Local variables: + * c-basic-offset: 4 + * c-file-style: "Stroustrup" + * indent-tabs-mode: nil + * End: + * vim: shiftwidth=4 tabstop=8 expandtab + */