X-Git-Url: http://git.indexdata.com/?p=idzebra-moved-to-github.git;a=blobdiff_plain;f=rset%2Frstemp.c;h=e32822b2e66b949c37898060bc69897ce3aaeacd;hp=34dd15251dd84425daa30ae29bac1e5aa4b5e4ab;hb=896c0427df9d8eff5de6a1735dcd992e067df844;hpb=c427496a1254a039887e02c8bb7ce1d673bb251b diff --git a/rset/rstemp.c b/rset/rstemp.c index 34dd152..e32822b 100644 --- a/rset/rstemp.c +++ b/rset/rstemp.c @@ -1,39 +1,53 @@ -/* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. - * Sebastian Hammer, Adam Dickmeiss - * - * $Log: rstemp.c,v $ - * Revision 1.3 1995-09-04 15:20:40 adam - * More work on temp sets. is_open member removed. - * - * Revision 1.2 1995/09/04 09:10:56 adam - * Minor changes. - * - * Revision 1.1 1994/11/04 13:21:30 quinn - * Working. - * - */ +/* $Id: rstemp.c,v 1.33 2002-08-02 19:26:57 adam 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 +#ifdef WIN32 +#include +#else +#include +#endif +#include +#include #include -#include +#include #include -static struct rset_control *r_create(const struct rset_control *sel, - void *parms); -static int r_open(struct rset_control *ct, int wflag); -static void r_close(struct rset_control *ct); -static void r_delete(struct rset_control *ct); -static void r_rewind(struct rset_control *ct); -static int r_count(struct 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 = { - "Temporary set", - 0, + "temp", r_create, r_open, r_close, @@ -41,68 +55,296 @@ static const rset_control control = r_rewind, r_count, r_read, - r_write + r_write, }; -const rset_control *rset_kind_temp = &control; +const struct rset_control *rset_kind_temp = &control; -struct rset_temp_private { +struct rset_temp_info { int fd; char *fname; - size_t key_size; - char *buf_mem; - size_t buf_size; - size_t pos_end; - size_t pos_cur; - size_t pos_buf; + size_t key_size; /* key size */ + char *buf_mem; /* window buffer */ + size_t buf_size; /* size of window */ + size_t pos_end; /* last position in set */ + size_t pos_cur; /* current position in set */ + size_t pos_buf; /* position of first byte in window */ + size_t pos_border; /* position of last byte+1 in window */ + int dirty; /* window is dirty */ + int hits; /* no of hits */ + char *temp_path; + int (*cmp)(const void *p1, const void *p2); }; -static struct rset_control *r_create(const struct rset_control *sel, - void *parms) -{ - rset_control *newct; - rset_temp_parms *temp_parms = parms; - struct rset_temp_private *info; - - logf (LOG_DEBUG, "ritemp_create(%s)", sel->desc); - newct = xmalloc(sizeof(*newct)); - memcpy(newct, sel, sizeof(*sel)); - newct->buf = xmalloc (sizeof(struct rset_temp_private)); - info = newct->buf; +struct rset_temp_rfd { + struct rset_temp_info *info; + struct rset_temp_rfd *next; + int *countp; + void *buf; +}; +static void *r_create(RSET ct, const struct rset_control *sel, void *parms) +{ + rset_temp_parms *temp_parms = (rset_temp_parms *) parms; + struct rset_temp_info *info; + + info = (struct rset_temp_info *) xmalloc (sizeof(struct rset_temp_info)); info->fd = -1; info->fname = NULL; info->key_size = temp_parms->key_size; - info->buf_size = 1024; - info->buf_mem = xmalloc (info->buf_size); + info->buf_size = 4096; + info->buf_mem = (char *) xmalloc (info->buf_size); info->pos_cur = 0; info->pos_end = 0; info->pos_buf = 0; + info->dirty = 0; + info->hits = -1; + info->cmp = temp_parms->cmp; + if (!temp_parms->temp_path) + info->temp_path = NULL; + else + { + info->temp_path = (char *) xmalloc (strlen(temp_parms->temp_path)+1); + strcpy (info->temp_path, temp_parms->temp_path); + } + ct->no_rset_terms = 1; + ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms)); + ct->rset_terms[0] = temp_parms->rset_term; + + return info; +} + +static RSFD r_open (RSET ct, int flag) +{ + struct rset_temp_info *info = (struct rset_temp_info *) ct->buf; + struct rset_temp_rfd *rfd; + + assert (info->fd == -1); + if (info->fname) + { + if (flag & RSETF_WRITE) + info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666); + else + info->fd = open (info->fname, O_BINARY|O_RDONLY); + if (info->fd == -1) + { + logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname); + exit (1); + } + } + rfd = (struct rset_temp_rfd *) xmalloc (sizeof(*rfd)); + rfd->info = info; + r_rewind (rfd); + + rfd->countp = &ct->rset_terms[0]->count; + rfd->buf = xmalloc (info->key_size); + + return rfd; +} + +/* r_flush: + flush current window to file if file is assocated with set + */ +static void r_flush (RSFD rfd, int mk) +{ + struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info; + + if (!info->fname && mk) + { +#if HAVE_MKSTEMP + char template[1024]; + + if (info->temp_path) + sprintf (template, "%s/zrsXXXXXX", info->temp_path); + else + sprintf (template, "zrsXXXXXX"); + + info->fd = mkstemp (template); - return newct; + if (info->fd == -1) + { + logf (LOG_FATAL|LOG_ERRNO, "mkstemp %s", template); + exit (1); + } + info->fname = (char *) xmalloc (strlen(template)+1); + strcpy (info->fname, template); +#else + char *s = (char*) tempnam (info->temp_path, "zrs"); + info->fname = (char *) xmalloc (strlen(s)+1); + strcpy (info->fname, s); + + logf (LOG_DEBUG, "creating tempfile %s", info->fname); + info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666); + if (info->fd == -1) + { + logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname); + exit (1); + } +#endif + } + if (info->fname && info->fd != -1 && info->dirty) + { + size_t count; + int r; + + if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1) + { + logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname); + exit (1); + } + count = info->buf_size; + if (count > info->pos_end - info->pos_buf) + count = info->pos_end - info->pos_buf; + if ((r = write (info->fd, info->buf_mem, count)) < (int) count) + { + if (r == -1) + logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname); + else + logf (LOG_FATAL, "write of %ld but got %ld", + (long) count, (long) r); + exit (1); + } + info->dirty = 0; + } } -static int r_open(struct rset_control *ct, int wflag) +static void r_close (RSFD rfd) { - struct rset_temp_private *info = ct->buf; + struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info; + + r_flush (rfd, 0); + if (info->fname && info->fd != -1) + { + close (info->fd); + info->fd = -1; + } + xfree (((struct rset_temp_rfd *)rfd)->buf); + xfree (rfd); +} + +static void r_delete (RSET ct) +{ + struct rset_temp_info *info = (struct rset_temp_info*) ct->buf; + + if (info->fname) + unlink (info->fname); + xfree (info->buf_mem); + logf (LOG_DEBUG, "r_delete: set size %ld", (long) info->pos_end); + if (info->fname) + { + logf (LOG_DEBUG, "r_delete: unlink %s", info->fname); + unlink (info->fname); + xfree (info->fname); + } + if (info->temp_path) + xfree (info->temp_path); + rset_term_destroy (ct->rset_terms[0]); + xfree (ct->rset_terms); + xfree (info); +} + +/* r_reread: + read from file to window if file is assocated with set - + indicated by fname + */ +static void r_reread (RSFD rfd) +{ + struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info; + + if (info->fname) + { + size_t count; + int r; + + info->pos_border = info->pos_cur + info->buf_size; + if (info->pos_border > info->pos_end) + info->pos_border = info->pos_end; + count = info->pos_border - info->pos_buf; + if (count > 0) + { + if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1) + { + logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname); + exit (1); + } + if ((r = read (info->fd, info->buf_mem, count)) < (int) count) + { + if (r == -1) + logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname); + else + logf (LOG_FATAL, "read of %ld but got %ld", + (long) count, (long) r); + exit (1); + } + } + } + else + info->pos_border = info->pos_end; +} + +static void r_rewind (RSFD rfd) +{ + struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info; + + r_flush (rfd, 0); info->pos_cur = 0; info->pos_buf = 0; + r_reread (rfd); +} + +static int r_count (RSET ct) +{ + struct rset_temp_info *info = (struct rset_temp_info *) ct->buf; + + return info->pos_end / info->key_size; } -static void r_close(struct rset_control *ct) -{} +static int r_read (RSFD rfd, void *buf, int *term_index) +{ + struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd; + struct rset_temp_info *info = mrfd->info; + + size_t nc = info->pos_cur + info->key_size; -static void r_delete(struct rset_control *ct) -{} + if (nc > info->pos_border) + { + if (nc > info->pos_end) + return 0; + r_flush (rfd, 0); + info->pos_buf = info->pos_cur; + r_reread (rfd); + } + memcpy (buf, info->buf_mem + (info->pos_cur - info->pos_buf), + info->key_size); + info->pos_cur = nc; + *term_index = 0; -static void r_rewind(struct rset_control *ct) -{} + if (*mrfd->countp == 0 || (*info->cmp)(buf, mrfd->buf) > 1) + { + memcpy (mrfd->buf, buf, mrfd->info->key_size); + (*mrfd->countp)++; + } + return 1; +} -static int r_count(struct rset_control *ct) -{} +static int r_write (RSFD rfd, const void *buf) +{ + struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info; -static int r_read() -{} + size_t nc = info->pos_cur + info->key_size; -static int r_write() -{} + if (nc > info->pos_buf + info->buf_size) + { + r_flush (rfd, 1); + info->pos_buf = info->pos_cur; + if (info->pos_buf < info->pos_end) + r_reread (rfd); + } + info->dirty = 1; + memcpy (info->buf_mem + (info->pos_cur - info->pos_buf), buf, + info->key_size); + info->pos_cur = nc; + if (nc > info->pos_end) + info->pos_border = info->pos_end = nc; + return 1; +}