1 /* $Id: rstemp.c,v 1.50 2004-09-30 09:53:05 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);
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 =
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,
83 const char *temp_path)
85 RSET rnew=rset_create_base(&control, nmem, kcontrol, scope);
86 struct rset_temp_info *info;
88 info = (struct rset_temp_info *) nmem_malloc(rnew->nmem, sizeof(*info));
91 info->buf_size = 4096;
92 info->buf_mem = (char *) nmem_malloc (rnew->nmem, info->buf_size);
99 info->temp_path = NULL;
101 info->temp_path = nmem_strdup(rnew->nmem,temp_path);
104 } /* rstemp_create */
106 static void r_delete (RSET ct)
108 struct rset_temp_info *info = (struct rset_temp_info*) ct->priv;
110 logf (LOG_DEBUG, "r_delete: set size %ld", (long) info->pos_end);
113 logf (LOG_DEBUG, "r_delete: unlink %s", info->fname);
114 unlink (info->fname);
119 static RSFD r_open (RSET ct, int flag)
121 struct rset_temp_info *info = (struct rset_temp_info *) ct->priv;
123 struct rset_temp_rfd *prfd;
125 if (info->fd == -1 && info->fname)
127 if (flag & RSETF_WRITE)
128 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
130 info->fd = open (info->fname, O_BINARY|O_RDONLY);
133 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
137 rfd = rfd_create_base(ct);
139 prfd= (struct rset_temp_rfd *) nmem_malloc(ct->nmem, sizeof(*prfd));
140 rfd->priv=(void *)prfd;
141 prfd->buf = nmem_malloc (ct->nmem,ct->keycontrol->key_size);
153 flush current window to file if file is assocated with set
155 static void r_flush (RSFD rfd, int mk)
157 /* struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info; */
158 struct rset_temp_info *info = rfd->rset->priv;
160 if (!info->fname && mk)
166 sprintf (template, "%s/zrsXXXXXX", info->temp_path);
168 sprintf (template, "zrsXXXXXX");
170 info->fd = mkstemp (template);
174 logf (LOG_FATAL|LOG_ERRNO, "mkstemp %s", template);
177 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
178 strcpy (info->fname, template);
180 char *s = (char*) tempnam (info->temp_path, "zrs");
181 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
182 strcpy (info->fname, s);
184 logf (LOG_DEBUG, "creating tempfile %s", info->fname);
185 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
188 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
193 if (info->fname && info->fd != -1 && info->dirty)
198 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
200 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
203 count = info->buf_size;
204 if (count > info->pos_end - info->pos_buf)
205 count = info->pos_end - info->pos_buf;
206 if ((r = write (info->fd, info->buf_mem, count)) < (int) count)
209 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
211 logf (LOG_FATAL, "write of %ld but got %ld",
212 (long) count, (long) r);
219 static void r_close (RSFD rfd)
221 /*struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv; */
222 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
224 if (info->fname && info->fd != -1)
228 } /* FIXME - Is this right, don't we risk closing the file too early ?*/
229 rfd_delete_base(rfd);
234 read from file to window if file is assocated with set -
237 static void r_reread (RSFD rfd)
239 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
240 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
247 info->pos_border = mrfd->pos_cur +
249 if (info->pos_border > info->pos_end)
250 info->pos_border = info->pos_end;
251 count = info->pos_border - info->pos_buf;
254 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
256 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
259 if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
262 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
264 logf (LOG_FATAL, "read of %ld but got %ld",
265 (long) count, (long) r);
271 info->pos_border = info->pos_end;
275 static int r_read (RSFD rfd, void *buf)
277 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
278 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
280 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
282 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
284 if (nc > info->pos_end)
287 info->pos_buf = mrfd->pos_cur;
290 memcpy (buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
291 rfd->rset->keycontrol->key_size);
297 static int r_write (RSFD rfd, const void *buf)
299 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
300 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
302 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
304 if (nc > info->pos_buf + info->buf_size)
307 info->pos_buf = mrfd->pos_cur;
308 if (info->pos_buf < info->pos_end)
312 memcpy (info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
313 rfd->rset->keycontrol->key_size);
315 if (nc > info->pos_end)
316 info->pos_border = info->pos_end = nc;
321 static void r_pos (RSFD rfd, double *current, double *total)
323 /* struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd; */
324 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
325 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
327 *current=(double) mrfd->cur;
328 *total=(double) info->hits;