X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=rset%2Frsisam.c;h=9eb27ccc11e26e772cdf33a05831808f5e764eb9;hb=82bdd90d99e036b5c491666b5be5471c59f8e1b8;hp=56a432c329cd43b38b9ca7043b8b06f02d4726e1;hpb=affd7e4168d70b94e015b777748b7eca1cd00ec0;p=idzebra-moved-to-github.git diff --git a/rset/rsisam.c b/rset/rsisam.c index 56a432c..9eb27cc 100644 --- a/rset/rsisam.c +++ b/rset/rsisam.c @@ -1,32 +1,80 @@ /* - * Copyright (C) 1994, Index Data I/S + * Copyright (C) 1994-1995, Index Data I/S * All rights reserved. * Sebastian Hammer, Adam Dickmeiss * * $Log: rsisam.c,v $ - * Revision 1.1 1994-11-04 13:21:29 quinn - * Working. + * Revision 1.15 1996-10-29 13:55:22 adam + * Include of zebrautl.h instead of alexutil.h. + * + * Revision 1.14 1995/12/11 09:15:24 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 1.13 1995/10/12 12:41:56 adam + * Private info (buf) moved from struct rset_control to struct rset. + * Bug fixes in relevance. + * + * Revision 1.12 1995/10/10 14:00:04 adam + * Function rset_open changed its wflag parameter to general flags. + * + * Revision 1.11 1995/10/06 14:38:05 adam + * New result set method: r_score. + * Local no (sysno) and score is transferred to retrieveCtrl. + * + * Revision 1.10 1995/09/08 14:52:42 adam + * Work on relevance feedback. + * + * Revision 1.9 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 1.8 1995/09/06 16:11:56 adam + * More work on boolean sets. + * + * Revision 1.7 1995/09/06 10:35:44 adam + * Null set implemented. + * + * Revision 1.6 1995/09/05 11:43:24 adam + * Complete version of temporary sets. Not tested yet though. + * + * 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 */ - +#include +#include #include -#include +#include -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 void *r_create(const struct rset_control *sel, void *parms, + int *flags); +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); +static int r_write (RSFD rfd, const void *buf); +static int r_score (RSFD rfd, int *score); static const rset_control control = { - "ISAM set type", - 0, + "isam", r_create, r_open, r_close, @@ -34,54 +82,107 @@ static const rset_control control = r_rewind, r_count, r_read, - r_write + r_write, + r_score }; const rset_control *rset_kind_isam = &control; -rset_control *r_create(const struct rset_control *sel, void *parms) +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 void *r_create(const struct rset_control *sel, void *parms, + int *flags) { - rset_control *newct; rset_isam_parms *pt = parms; + struct rset_isam_info *info; - newct = xmalloc(sizeof(*newct)); - if (!(newct->buf = (char*) is_position(pt->is, pt->pos))) - return 0; - return newct; + *flags |= RSET_FLAG_VOLATILE; + info = xmalloc (sizeof(struct rset_isam_info)); + info->is = pt->is; + info->pos = pt->pos; + info->ispt_list = NULL; + return info; } -static int r_open(rset_control *ct, int wflag) +RSFD r_open (RSET ct, int flag) { - r_rewind(ct); - return 0; + struct rset_isam_info *info = ct->buf; + struct rset_ispt_info *ptinfo; + + logf (LOG_DEBUG, "risam_open"); + if (flag & RSETF_WRITE) + { + logf (LOG_FATAL, "ISAM set type is read-only"); + return NULL; + } + ptinfo = xmalloc (sizeof(*ptinfo)); + ptinfo->next = info->ispt_list; + info->ispt_list = ptinfo; + ptinfo->pt = is_position (info->is, info->pos); + ptinfo->info = info; + 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; + free (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) { - is_pt_free((ISPT) ct->buf); - xfree(ct); + struct rset_isam_info *info = ct->buf; + + logf (LOG_DEBUG, "rsisam_delete"); + assert (info->ispt_list == NULL); + xfree (info); +} + +static void r_rewind (RSFD rfd) +{ + logf (LOG_DEBUG, "rsisam_rewind"); + is_rewind( ((struct rset_ispt_info*) rfd)->pt); } -static void r_rewind(rset_control *ct) +static int r_count (RSET ct) { - is_rewind((ISPT) ct->buf); + return 0; } -static int r_count(rset_control *ct) -{return 0;} +static int r_read (RSFD rfd, void *buf) +{ + return is_readkey( ((struct rset_ispt_info*) rfd)->pt, buf); +} -static int r_read(rset_control *ct, void *buf) +static int r_write (RSFD rfd, const void *buf) { - return is_readkey((ISPT) ct->buf, buf); + logf (LOG_FATAL, "ISAM set type is read-only"); + return -1; } -static int r_write(rset_control *ct, const void *buf) +static int r_score (RSFD rfd, int *score) { - log(LOG_FATAL, "ISAM set type is read-only"); + *score = -1; return -1; }