X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=include%2Frset.h;h=4517ba95171a59e073a5b87bff6fb9a3c84d93d4;hb=230fdc17aa503a23c842cd587f241cfe2fce1c0d;hp=f7029a4760ee0411c7ab7d81801ada8858823676;hpb=f9c392f9951e6e9ad9709999a43ba9d671c4b9c7;p=idzebra-moved-to-github.git diff --git a/include/rset.h b/include/rset.h index f7029a4..4517ba9 100644 --- a/include/rset.h +++ b/include/rset.h @@ -1,63 +1,123 @@ -/* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. - * Sebastian Hammer, Adam Dickmeiss - * - * $Log: rset.h,v $ - * 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 1.32 2004-08-31 10:43:35 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. +*/ + + #ifndef RSET_H #define RSET_H -typedef struct rset_control +#include + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct rsfd *RSFD; /* Rset "file descriptor" */ +typedef struct rset *RSET; /* Result set */ + +struct rsfd { /* the stuff common to all rsfd's. */ + RSET rset; /* ptr to the rset this FD is opened to */ + void *priv; /* private parameters for this type */ + RSFD next; /* to keep lists of used/free rsfd's */ +}; + + +struct rset_control { char *desc; /* text description of set type (for debugging) */ - char *buf; /* state data stored by subsystem */ - struct rset_control *(*f_create)(const struct rset_control *sel, void *parms); - int (*f_open)(struct rset_control *ct, int wflag); - void (*f_close)(struct rset_control *ct); - void (*f_delete)(struct rset_control *ct); - void (*f_rewind)(struct rset_control *ct); - int (*f_count)(struct rset_control *ct); - int (*f_read)(struct rset_control *ct, void *buf); - int (*f_write)(struct rset_control *ct, const void *buf); -} rset_control; +/* RSET rs_something_create(const struct rset_control *sel, ...); */ + void (*f_delete)(RSET ct); + RSFD (*f_open)(RSET ct, int wflag); + void (*f_close)(RSFD rfd); + void (*f_rewind)(RSFD rfd); + int (*f_forward)(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 rset_default_forward(RSFD rfd, void *buf, + int (*cmpfunc)(const void *p1, const void *p2), + const void *untilbuf); + typedef struct rset { - int is_open; - 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 */ + RSFD free_list; /* all rfd's allocated but not currently in use */ +} 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. */ -RSET rset_create(const rset_control *sel, void *parms); /* parameters? */ +RSFD rfd_create_base(RSET rs); +void rfd_delete_base(RSFD rfd); -/* int rset_open(RSET rs, int wflag); */ -#define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs)->control, (wflag))) +RSET rset_create_base(const struct rset_control *sel, NMEM nmem); +void rset_delete(RSET rs); +RSET rset_dup (RSET rs); -/* void rset_close(RSET rs); */ -#define rset_close(rs) ((*(rs)->control->f_close)((rs)->control)) -void rset_delete(RSET rs); +#define RSETF_READ 0 +#define RSETF_WRITE 1 +/* RSFD rset_open(RSET rs, int wflag); */ +#define rset_open(rs, wflag) (*(rs)->control->f_open)((rs), (wflag)) -/* void rset_rewind(RSET rs); */ -#define rset_rewind(rs, wflag) ((*(rs)->control->f_rewind)((rs)->control)) +/* void rset_close(RSFD rfd); */ +#define rset_close(rfd) (*(rfd)->rset->control->f_close)(rfd) -/* int rset_count(RSET rs); */ -#define rset_count(rs, wflag) ((*(rs)->control->f_count)((rs)->control)) +/* void rset_rewind(RSFD rfd); */ +#define rset_rewind(rfd) (*(rfd)->rset->control->f_rewind)((rfd)) -/* int rset_read(RSET rs, void *buf); */ /* change parameters */ -#define rset_read(rs, buf) ((*(rs)->control->f_read)((rs)->control, (buf))) +/* int rset_forward(RSFD rfd, void *buf, void *untilbuf); */ +#define rset_forward(rfd, buf, cmpfunc, untilbuf) \ + (*(rfd)->rset->control->f_forward)((rfd),(buf),(cmpfunc),(untilbuf)) +/*FIXME - get rid of the cmp function here, keep it in a general */ +/* key_control block */ +/* int rset_pos(RSFD fd, double *current, double *total); */ +#define rset_pos(rfd,cur,tot) \ + (*(rfd)->rset->control->f_pos)( (rfd),(cur),(tot)) -int rset_write(RSET rs, void *buf); /* change parameters */ +/* int rset_read(RSFD rfd, void *buf); */ +#define rset_read(rfd, buf) (*(rfd)->rset->control->f_read)((rfd), (buf)) + +/* int rset_write(RSFD rfd, const void *buf); */ +#define rset_write(rfd, buf) (*(rfd)->rset->control->f_write)((rfd), (buf)) + +/* int rset_type (RSET) */ +#define rset_type(rs) ((rs)->control->desc) + + +#ifdef __cplusplus +} +#endif #endif