1 /* $Id: rstemp.c,v 1.52 2004-10-22 10:12:52 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 int r_read (RSFD rfd, void *buf, TERMID *term);
41 static int r_write (RSFD rfd, const void *buf);
42 static void r_pos (RSFD rfd, double *current, double *total);
43 static void r_flush (RSFD rfd, int mk);
44 static void r_reread (RSFD rfd);
47 static const struct rset_control control =
60 const struct rset_control *rset_kind_temp = &control;
62 struct rset_temp_info {
63 int fd; /* file descriptor for temp file */
64 char *fname; /* name of temp file */
65 char *buf_mem; /* window buffer */
66 size_t buf_size; /* size of window */
67 size_t pos_end; /* last position in set */
68 size_t pos_buf; /* position of first byte in window */
69 size_t pos_border; /* position of last byte+1 in window */
70 int dirty; /* window is dirty */
71 zint hits; /* no of hits */
75 struct rset_temp_rfd {
77 size_t pos_cur; /* current position in set */
78 /* FIXME - term pos or what ?? */
79 zint cur; /* number of the current hit */
82 RSET rstemp_create( NMEM nmem, const struct key_control *kcontrol,
84 const char *temp_path)
86 RSET rnew=rset_create_base(&control, nmem, kcontrol, scope,0);
87 struct rset_temp_info *info;
89 info = (struct rset_temp_info *) nmem_malloc(rnew->nmem, sizeof(*info));
92 info->buf_size = 4096;
93 info->buf_mem = (char *) nmem_malloc (rnew->nmem, info->buf_size);
100 info->temp_path = NULL;
102 info->temp_path = nmem_strdup(rnew->nmem,temp_path);
105 } /* rstemp_create */
107 static void r_delete (RSET ct)
109 struct rset_temp_info *info = (struct rset_temp_info*) ct->priv;
111 logf (LOG_DEBUG, "r_delete: set size %ld", (long) info->pos_end);
114 logf (LOG_DEBUG, "r_delete: unlink %s", info->fname);
115 unlink (info->fname);
120 static RSFD r_open (RSET ct, int flag)
122 struct rset_temp_info *info = (struct rset_temp_info *) ct->priv;
124 struct rset_temp_rfd *prfd;
126 if (info->fd == -1 && info->fname)
128 if (flag & RSETF_WRITE)
129 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
131 info->fd = open (info->fname, O_BINARY|O_RDONLY);
134 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
138 rfd = rfd_create_base(ct);
140 prfd= (struct rset_temp_rfd *) nmem_malloc(ct->nmem, sizeof(*prfd));
141 rfd->priv=(void *)prfd;
142 prfd->buf = nmem_malloc (ct->nmem,ct->keycontrol->key_size);
154 flush current window to file if file is assocated with set
156 static void r_flush (RSFD rfd, int mk)
158 /* struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info; */
159 struct rset_temp_info *info = rfd->rset->priv;
161 if (!info->fname && mk)
167 sprintf (template, "%s/zrsXXXXXX", info->temp_path);
169 sprintf (template, "zrsXXXXXX");
171 info->fd = mkstemp (template);
175 logf (LOG_FATAL|LOG_ERRNO, "mkstemp %s", template);
178 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
179 strcpy (info->fname, template);
181 char *s = (char*) tempnam (info->temp_path, "zrs");
182 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
183 strcpy (info->fname, s);
185 logf (LOG_DEBUG, "creating tempfile %s", info->fname);
186 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
189 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
194 if (info->fname && info->fd != -1 && info->dirty)
199 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
201 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
204 count = info->buf_size;
205 if (count > info->pos_end - info->pos_buf)
206 count = info->pos_end - info->pos_buf;
207 if ((r = write (info->fd, info->buf_mem, count)) < (int) count)
210 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
212 logf (LOG_FATAL, "write of %ld but got %ld",
213 (long) count, (long) r);
220 static void r_close (RSFD rfd)
222 /*struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv; */
223 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
225 if (info->fname && info->fd != -1)
229 } /* FIXME - Is this right, don't we risk closing the file too early ?*/
230 rfd_delete_base(rfd);
235 read from file to window if file is assocated with set -
238 static void r_reread (RSFD rfd)
240 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
241 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
248 info->pos_border = mrfd->pos_cur +
250 if (info->pos_border > info->pos_end)
251 info->pos_border = info->pos_end;
252 count = info->pos_border - info->pos_buf;
255 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
257 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
260 if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
263 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
265 logf (LOG_FATAL, "read of %ld but got %ld",
266 (long) count, (long) r);
272 info->pos_border = info->pos_end;
276 static int r_read (RSFD rfd, void *buf, TERMID *term)
278 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
279 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
281 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
283 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
285 if (nc > info->pos_end)
288 info->pos_buf = mrfd->pos_cur;
291 memcpy (buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
292 rfd->rset->keycontrol->key_size);
294 *term=rfd->rset->term;
295 /* FIXME - should we store and return terms ?? */
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;