1 /* $Id: rstemp.c,v 1.48 2004-09-01 15:01:32 heikki Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003
5 This file is part of the Zebra server.
7 Zebra is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with Zebra; see the file LICENSE.zebra. If not, write to the
19 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
31 #include <sys/types.h>
37 static RSFD r_open (RSET ct, int flag);
38 static void r_close (RSFD rfd);
39 static void r_delete (RSET ct);
40 static void r_rewind (RSFD rfd);
41 static int r_read (RSFD rfd, void *buf);
42 static int r_write (RSFD rfd, const void *buf);
43 static void r_pos (RSFD rfd, double *current, double *total);
46 static const struct rset_control control =
59 const struct rset_control *rset_kind_temp = &control;
61 struct rset_temp_info {
62 int fd; /* file descriptor for temp file */
63 char *fname; /* name of temp file */
64 char *buf_mem; /* window buffer */
65 size_t buf_size; /* size of window */
66 size_t pos_end; /* last position in set */
67 size_t pos_buf; /* position of first byte in window */
68 size_t pos_border; /* position of last byte+1 in window */
69 int dirty; /* window is dirty */
70 zint hits; /* no of hits */
74 struct rset_temp_rfd {
76 size_t pos_cur; /* current position in set */
77 /* FIXME - term pos or what ?? */
78 zint cur; /* number of the current hit */
81 RSET rstemp_create( NMEM nmem, const struct key_control *kcontrol,
82 const char *temp_path)
84 RSET rnew=rset_create_base(&control, nmem, kcontrol);
85 struct rset_temp_info *info;
87 info = (struct rset_temp_info *) nmem_malloc(rnew->nmem, sizeof(*info));
90 info->buf_size = 4096;
91 info->buf_mem = (char *) nmem_malloc (rnew->nmem, info->buf_size);
98 info->temp_path = NULL;
100 info->temp_path = nmem_strdup(rnew->nmem,temp_path);
103 } /* rstemp_create */
105 static void r_delete (RSET ct)
107 struct rset_temp_info *info = (struct rset_temp_info*) ct->priv;
109 logf (LOG_DEBUG, "r_delete: set size %ld", (long) info->pos_end);
112 logf (LOG_DEBUG, "r_delete: unlink %s", info->fname);
113 unlink (info->fname);
118 static RSFD r_open (RSET ct, int flag)
120 struct rset_temp_info *info = (struct rset_temp_info *) ct->priv;
122 struct rset_temp_rfd *prfd;
124 if (info->fd == -1 && info->fname)
126 if (flag & RSETF_WRITE)
127 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
129 info->fd = open (info->fname, O_BINARY|O_RDONLY);
132 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
136 rfd = rfd_create_base(ct);
138 prfd= (struct rset_temp_rfd *) nmem_malloc(ct->nmem, sizeof(*prfd));
139 rfd->priv=(void *)prfd;
140 prfd->buf = nmem_malloc (ct->nmem,ct->keycontrol->key_size);
147 flush current window to file if file is assocated with set
149 static void r_flush (RSFD rfd, int mk)
151 /* struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info; */
152 struct rset_temp_info *info = rfd->rset->priv;
154 if (!info->fname && mk)
160 sprintf (template, "%s/zrsXXXXXX", info->temp_path);
162 sprintf (template, "zrsXXXXXX");
164 info->fd = mkstemp (template);
168 logf (LOG_FATAL|LOG_ERRNO, "mkstemp %s", template);
171 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
172 strcpy (info->fname, template);
174 char *s = (char*) tempnam (info->temp_path, "zrs");
175 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
176 strcpy (info->fname, s);
178 logf (LOG_DEBUG, "creating tempfile %s", info->fname);
179 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
182 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
187 if (info->fname && info->fd != -1 && info->dirty)
192 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
194 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
197 count = info->buf_size;
198 if (count > info->pos_end - info->pos_buf)
199 count = info->pos_end - info->pos_buf;
200 if ((r = write (info->fd, info->buf_mem, count)) < (int) count)
203 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
205 logf (LOG_FATAL, "write of %ld but got %ld",
206 (long) count, (long) r);
213 static void r_close (RSFD rfd)
215 /*struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv; */
216 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
218 if (info->fname && info->fd != -1)
222 } /* FIXME - Is this right, don't we risk closing the file too early ?*/
223 rfd_delete_base(rfd);
228 read from file to window if file is assocated with set -
231 static void r_reread (RSFD rfd)
233 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
234 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
241 info->pos_border = mrfd->pos_cur +
243 if (info->pos_border > info->pos_end)
244 info->pos_border = info->pos_end;
245 count = info->pos_border - info->pos_buf;
248 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
250 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
253 if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
256 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
258 logf (LOG_FATAL, "read of %ld but got %ld",
259 (long) count, (long) r);
265 info->pos_border = info->pos_end;
268 static void r_rewind (RSFD rfd)
270 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) (rfd->priv);
271 struct rset_temp_info *info = (struct rset_temp_info *)(rfd->rset->priv);
279 static int r_read (RSFD rfd, void *buf)
281 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
282 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
284 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
286 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
288 if (nc > info->pos_end)
291 info->pos_buf = mrfd->pos_cur;
294 memcpy (buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
295 rfd->rset->keycontrol->key_size);
301 static int r_write (RSFD rfd, const void *buf)
303 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
304 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
306 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
308 if (nc > info->pos_buf + info->buf_size)
311 info->pos_buf = mrfd->pos_cur;
312 if (info->pos_buf < info->pos_end)
316 memcpy (info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
317 rfd->rset->keycontrol->key_size);
319 if (nc > info->pos_end)
320 info->pos_border = info->pos_end = nc;
325 static void r_pos (RSFD rfd, double *current, double *total)
327 /* struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd; */
328 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
329 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
331 *current=(double) mrfd->cur;
332 *total=(double) info->hits;