1 /* $Id: rstemp.c,v 1.44 2004-08-24 08:52:30 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 void *r_create(RSET ct, const struct rset_control *sel, void *parms);
38 static RSFD r_open (RSET ct, int flag);
39 static void r_close (RSFD rfd);
40 static void r_delete (RSET ct);
41 static void r_rewind (RSFD rfd);
42 /* static int r_count (RSET ct);*/
43 static int r_read (RSFD rfd, void *buf);
44 static int r_write (RSFD rfd, const void *buf);
45 static void r_pos (RSFD rfd, double *current, double *total);
47 static const struct rset_control control =
61 const struct rset_control *rset_kind_temp = &control;
63 struct rset_temp_info {
66 size_t key_size; /* key size */
67 char *buf_mem; /* window buffer */
68 size_t buf_size; /* size of window */
69 size_t pos_end; /* last position in set */
70 size_t pos_buf; /* position of first byte in window */
71 size_t pos_border; /* position of last byte+1 in window */
72 int dirty; /* window is dirty */
73 zint hits; /* no of hits */
75 int (*cmp)(const void *p1, const void *p2);
76 struct rset_temp_rfd *rfd_list;
79 struct rset_temp_rfd {
80 struct rset_temp_info *info;
81 struct rset_temp_rfd *next;
83 size_t pos_cur; /* current position in set */
84 zint cur; /* number of the current hit */
87 static void *r_create(RSET ct, const struct rset_control *sel, void *parms)
89 rset_temp_parms *temp_parms = (rset_temp_parms *) parms;
90 struct rset_temp_info *info;
92 info = (struct rset_temp_info *) xmalloc (sizeof(struct rset_temp_info));
95 info->key_size = temp_parms->key_size;
96 info->buf_size = 4096;
97 info->buf_mem = (char *) xmalloc (info->buf_size);
102 info->cmp = temp_parms->cmp;
103 info->rfd_list = NULL;
105 if (!temp_parms->temp_path)
106 info->temp_path = NULL;
109 info->temp_path = (char *) xmalloc (strlen(temp_parms->temp_path)+1);
110 strcpy (info->temp_path, temp_parms->temp_path);
116 static RSFD r_open (RSET ct, int flag)
118 struct rset_temp_info *info = (struct rset_temp_info *) ct->buf;
119 struct rset_temp_rfd *rfd;
121 if (info->fd == -1 && info->fname)
123 if (flag & RSETF_WRITE)
124 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
126 info->fd = open (info->fname, O_BINARY|O_RDONLY);
129 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
133 rfd = (struct rset_temp_rfd *) xmalloc (sizeof(*rfd));
134 rfd->next = info->rfd_list;
135 info->rfd_list = rfd;
139 rfd->buf = xmalloc (info->key_size);
145 flush current window to file if file is assocated with set
147 static void r_flush (RSFD rfd, int mk)
149 struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info;
151 if (!info->fname && mk)
157 sprintf (template, "%s/zrsXXXXXX", info->temp_path);
159 sprintf (template, "zrsXXXXXX");
161 info->fd = mkstemp (template);
165 logf (LOG_FATAL|LOG_ERRNO, "mkstemp %s", template);
168 info->fname = (char *) xmalloc (strlen(template)+1);
169 strcpy (info->fname, template);
171 char *s = (char*) tempnam (info->temp_path, "zrs");
172 info->fname = (char *) xmalloc (strlen(s)+1);
173 strcpy (info->fname, s);
175 logf (LOG_DEBUG, "creating tempfile %s", info->fname);
176 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
179 logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
184 if (info->fname && info->fd != -1 && info->dirty)
189 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
191 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
194 count = info->buf_size;
195 if (count > info->pos_end - info->pos_buf)
196 count = info->pos_end - info->pos_buf;
197 if ((r = write (info->fd, info->buf_mem, count)) < (int) count)
200 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
202 logf (LOG_FATAL, "write of %ld but got %ld",
203 (long) count, (long) r);
210 static void r_close (RSFD rfd)
212 struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
213 struct rset_temp_rfd **rfdp;
215 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
219 xfree ((*rfdp)->buf);
221 *rfdp = (*rfdp)->next;
224 if (!info->rfd_list && info->fname && info->fd != -1)
231 logf (LOG_FATAL, "r_close but no rfd match!");
235 static void r_delete (RSET ct)
237 struct rset_temp_info *info = (struct rset_temp_info*) ct->buf;
240 unlink (info->fname);
241 xfree (info->buf_mem);
242 logf (LOG_DEBUG, "r_delete: set size %ld", (long) info->pos_end);
245 logf (LOG_DEBUG, "r_delete: unlink %s", info->fname);
246 unlink (info->fname);
250 xfree (info->temp_path);
255 read from file to window if file is assocated with set -
258 static void r_reread (RSFD rfd)
260 struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
267 info->pos_border = ((struct rset_temp_rfd *)rfd)->pos_cur +
269 if (info->pos_border > info->pos_end)
270 info->pos_border = info->pos_end;
271 count = info->pos_border - info->pos_buf;
274 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
276 logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
279 if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
282 logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
284 logf (LOG_FATAL, "read of %ld but got %ld",
285 (long) count, (long) r);
291 info->pos_border = info->pos_end;
294 static void r_rewind (RSFD rfd)
296 struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
299 ((struct rset_temp_rfd *)rfd)->pos_cur = 0;
302 ((struct rset_temp_rfd *)rfd)->cur=0;
306 static int r_count (RSET ct)
308 struct rset_temp_info *info = (struct rset_temp_info *) ct->buf;
310 return info->pos_end / info->key_size;
313 static int r_read (RSFD rfd, void *buf)
315 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd;
316 struct rset_temp_info *info = mrfd->info;
318 size_t nc = mrfd->pos_cur + info->key_size;
320 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
322 if (nc > info->pos_end)
325 info->pos_buf = mrfd->pos_cur;
328 memcpy (buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
335 static int r_write (RSFD rfd, const void *buf)
337 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd;
338 struct rset_temp_info *info = mrfd->info;
340 size_t nc = mrfd->pos_cur + info->key_size;
342 if (nc > info->pos_buf + info->buf_size)
345 info->pos_buf = mrfd->pos_cur;
346 if (info->pos_buf < info->pos_end)
350 memcpy (info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
353 if (nc > info->pos_end)
354 info->pos_border = info->pos_end = nc;
359 static void r_pos (RSFD rfd, double *current, double *total)
361 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd;
362 *current=(double) mrfd->cur;
363 *total=(double) mrfd->info->hits;