X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=include%2Frset.h;h=2add4a1a18ed4e36f564a6ac6f0c08a6cffcc7d6;hb=3e8db66d56c466a5a269362eb70b4931d9579128;hp=d793730ae115ad5c0b05df348525e1d4a3b1de28;hpb=0245f556af399689056b7810ed0e3de93021ad4a;p=idzebra-moved-to-github.git diff --git a/include/rset.h b/include/rset.h index d793730..2add4a1 100644 --- a/include/rset.h +++ b/include/rset.h @@ -1,98 +1,117 @@ -/* - * Copyright (C) 1994-1995, Index Data I/S - * All rights reserved. - * Sebastian Hammer, Adam Dickmeiss - * - * $Log: rset.h,v $ - * Revision 1.9 1995-10-10 14:00:01 adam - * Function rset_open changed its wflag parameter to general flags. - * - * Revision 1.8 1995/10/06 14:37:53 adam - * New result set method: r_score. - * Local no (sysno) and score is transferred to retrieveCtrl. - * - * Revision 1.7 1995/09/07 13:58:08 adam - * New parameter: result-set file descriptor (RSFD) to support multiple - * positions within the same result-set. - * Boolean operators: and, or, not implemented. - * - * Revision 1.6 1995/09/06 16:10:58 adam - * More work on boolean sets. - * - * Revision 1.5 1995/09/04 15:20:13 adam - * More work on temp sets. is_open member removed. - * - * Revision 1.4 1995/09/04 09:09:52 adam - * String arg in dict lookup is const. - * Minor changes. - * - * Revision 1.3 1994/11/22 13:15:27 quinn - * Simple - * - * Revision 1.2 1994/11/04 13:21:21 quinn - * Working. - * - * Revision 1.1 1994/11/03 14:13:22 quinn - * Result set manipulation - * - */ +/* $Id: rset.h,v 1.31 2004-08-24 14:25:15 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. +*/ + + #ifndef RSET_H #define RSET_H #include -typedef void *RSFD; +#ifdef __cplusplus +extern "C" { +#endif + +typedef void *RSFD; /* Rset "file descriptor" */ +typedef struct rset *RSET; -typedef struct rset_control +struct rset_control { char *desc; /* text description of set type (for debugging) */ - void *buf; /* state data stored by subsystem */ - struct rset_control *(*f_create)(const struct rset_control *sel, void *parms); - RSFD (*f_open)(struct rset_control *ct, int wflag); +/* void *(*f_create)(RSET ct, const struct rset_control *sel, void *parms); */ + RSFD (*f_open)(RSET ct, int wflag); void (*f_close)(RSFD rfd); - void (*f_delete)(struct rset_control *ct); + void (*f_delete)(RSET ct); void (*f_rewind)(RSFD rfd); - int (*f_count)(struct rset_control *ct); + int (*f_forward)(RSET ct, RSFD rfd, void *buf, + int (*cmpfunc)(const void *p1, const void *p2), + const void *untilbuf); + void (*f_pos)(RSFD rfd, double *current, double *total); + /* returns -1,-1 if pos function not implemented for this type */ int (*f_read)(RSFD rfd, void *buf); int (*f_write)(RSFD rfd, const void *buf); - int (*f_score)(RSFD rfd, int *score); -} rset_control; +}; + +int rset_default_forward(RSET ct, RSFD rfd, void *buf, + int (*cmpfunc)(const void *p1, const void *p2), + const void *untilbuf); +void rset_default_pos(RSFD rfd, double *current, double *total); + typedef struct rset { - rset_control *control; -} rset, *RSET; + const struct rset_control *control; + int count; /* reference count */ + void *priv; /* stuff private to the given type of rset */ + NMEM nmem; /* nibble memory for various allocs */ + char my_nmem; /* Should the nmem be destroyed with the rset? */ + /* 1 if created with it, 0 if passed from above */ +} rset; +/* rset is a "virtual base class", which will never exist on its own */ +/* all instances are rsets of some specific type, like rsisamb, or rsbool */ +/* They keep their own stuff behind the priv pointer. */ #define RSETF_READ 0 #define RSETF_WRITE 1 -#define RSETF_SORT_SYSNO 0 -#define RSETF_SORT_RANK 2 +RSET rset_create_base(const struct rset_control *sel, NMEM nmem); -RSET rset_create(const rset_control *sel, void *parms); /* parameters? */ +RSET rset_create_OLD(const struct rset_control *sel, void *parms); +/* parameters? */ -/* int rset_open(RSET rs, int wflag); */ -#define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs)->control, (wflag))) +void rset_delete(RSET rs); -/* void rset_close(RSET rs); */ -#define rset_close(rs, rfd) ((*(rs)->control->f_close)((rfd))) +RSET rset_dup (RSET rs); -void rset_delete(RSET rs); + +/* RSFD rset_open(RSET rs, int wflag); */ +#define rset_open(rs, wflag) (*(rs)->control->f_open)((rs), (wflag)) + +/* void rset_close(RSET rs); */ +#define rset_close(rs, rfd) (*(rs)->control->f_close)(rfd) /* void rset_rewind(RSET rs); */ -#define rset_rewind(rs, rfd) ((*(rs)->control->f_rewind)((rfd))) +#define rset_rewind(rs, rfd) (*(rs)->control->f_rewind)((rfd)) + +/* int rset_forward(RSET rs, void *buf, void *untilbuf); */ +#define rset_forward(rs, fd, buf, cmpfunc, untilbuf) \ + (*(rs)->control->f_forward)((rs), (fd), (buf), (cmpfunc), (untilbuf)) -/* int rset_count(RSET rs); */ -#define rset_count(rs) ((*(rs)->control->f_count)((rs)->control)) +/* int rset_pos(RSET rs, RSFD fd, double *current, double *total); */ +#define rset_pos(rs,fd,cur,tot) \ + (*(rs)->control->f_pos)( (fd),(cur),(tot)) /* int rset_read(RSET rs, void *buf); */ -#define rset_read(rs, fd, buf) ((*(rs)->control->f_read)((fd), (buf))) +#define rset_read(rs, fd, buf) (*(rs)->control->f_read)((fd), (buf)) /* int rset_write(RSET rs, const void *buf); */ -#define rset_write(rs, fd, buf) ((*(rs)->control->f_write)((fd), (buf))) +#define rset_write(rs, fd, buf) (*(rs)->control->f_write)((fd), (buf)) + +/* int rset_type (RSET) */ +#define rset_type(rs) ((rs)->control->desc) -/* int rset_score(RSET rs, int *buf); */ -#define rset_score(rs, fd, score) ((*(rs)->control->f_score)((fd), (score))) + +#ifdef __cplusplus +} +#endif #endif