1 /* $Id: rstemp.c,v 1.63 2005-05-03 09:11:36 adam Exp $
2 Copyright (C) 1995-2005
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
33 #include <sys/types.h>
35 #include <idzebra/util.h>
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 int r_read(RSFD rfd, void *buf, TERMID *term);
42 static int r_write(RSFD rfd, const void *buf);
43 static void r_pos(RSFD rfd, double *current, double *total);
44 static void r_flush(RSFD rfd, int mk);
45 static void r_reread(RSFD rfd);
47 static const struct rset_control control =
61 int fd; /* file descriptor for temp file */
62 char *fname; /* name of temp file */
63 char *buf_mem; /* window buffer */
64 size_t buf_size; /* size of window */
65 size_t pos_end; /* last position in set */
66 size_t pos_buf; /* position of first byte in window */
67 size_t pos_border; /* position of last byte+1 in window */
68 int dirty; /* window is dirty */
69 zint hits; /* no of hits */
75 size_t pos_cur; /* current position in set */
76 /* FIXME - term pos or what ?? */
77 zint cur; /* number of the current hit */
80 static int log_level = 0;
81 static int log_level_initialized = 0;
83 RSET rstemp_create(NMEM nmem, struct rset_key_control *kcontrol,
84 int scope, const char *temp_path, TERMID term)
86 RSET rnew = rset_create_base(&control, nmem, kcontrol, scope, term);
87 struct rset_private *info;
88 if (!log_level_initialized)
90 log_level = yaz_log_module_level("rstemp");
91 log_level_initialized = 1;
93 info = (struct rset_private *) nmem_malloc(rnew->nmem, sizeof(*info));
96 info->buf_size = 4096;
97 info->buf_mem = (char *) nmem_malloc(rnew->nmem, info->buf_size);
104 info->temp_path = NULL;
106 info->temp_path = nmem_strdup(rnew->nmem, temp_path);
109 } /* rstemp_create */
111 static void r_delete(RSET ct)
113 struct rset_private *info = (struct rset_private*) ct->priv;
115 yaz_log(log_level, "r_delete: set size %ld", (long) info->pos_end);
118 yaz_log(log_level, "r_delete: unlink %s", info->fname);
123 static RSFD r_open(RSET ct, int flag)
125 struct rset_private *info = (struct rset_private *) ct->priv;
127 struct rfd_private *prfd;
129 if (info->fd == -1 && info->fname)
131 if (flag & RSETF_WRITE)
132 info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
134 info->fd = open(info->fname, O_BINARY|O_RDONLY);
137 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open failed %s", info->fname);
141 rfd = rfd_create_base(ct);
144 prfd = (struct rfd_private *) nmem_malloc(ct->nmem, sizeof(*prfd));
145 rfd->priv = (void *)prfd;
146 prfd->buf = nmem_malloc(ct->nmem,ct->keycontrol->key_size);
159 flush current window to file if file is assocated with set
161 static void r_flush(RSFD rfd, int mk)
163 struct rset_private *info = rfd->rset->priv;
165 if (!info->fname && mk)
170 sprintf(template, "%s/zrsXXXXXX", info->temp_path);
172 sprintf(template, "zrsXXXXXX");
174 info->fd = mkstemp(template);
178 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: mkstemp %s", template);
181 info->fname = nmem_strdup(rfd->rset->nmem, template);
183 char *s = (char*) tempnam(info->temp_path, "zrs");
184 info->fname= nmem_strdup(rfd->rset->nmem, s);
186 yaz_log(log_level, "creating tempfile %s", info->fname);
187 info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
190 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open %s", info->fname);
195 if (info->fname && info->fd != -1 && info->dirty)
200 if (lseek(info->fd, info->pos_buf, SEEK_SET) == -1)
202 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (1) %s", info->fname);
205 count = info->buf_size;
206 if (count > info->pos_end - info->pos_buf)
207 count = info->pos_end - info->pos_buf;
208 if ((r = write(info->fd, info->buf_mem, count)) < (int) count)
211 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: write %s", info->fname);
213 yaz_log(YLOG_FATAL, "rstemp: write of %ld but got %ld",
214 (long) count, (long) r);
221 static void r_close(RSFD rfd)
223 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
224 if (rfd_is_last(rfd))
227 if (info->fname && info->fd != -1)
233 rfd_delete_base(rfd);
238 read from file to window if file is assocated with set -
241 static void r_reread(RSFD rfd)
243 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
244 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
251 info->pos_border = mrfd->pos_cur +
253 if (info->pos_border > info->pos_end)
254 info->pos_border = info->pos_end;
255 count = info->pos_border - info->pos_buf;
258 if (lseek(info->fd, info->pos_buf, SEEK_SET) == -1)
260 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (2) %s fd=%d", info->fname, info->fd);
263 if ((r = read(info->fd, info->buf_mem, count)) < (int) count)
266 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: read %s", info->fname);
268 yaz_log(YLOG_FATAL, "read of %ld but got %ld",
269 (long) count, (long) r);
275 info->pos_border = info->pos_end;
278 static int r_read(RSFD rfd, void *buf, TERMID *term)
280 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
281 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
283 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
285 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
287 if (nc > info->pos_end)
290 info->pos_buf = mrfd->pos_cur;
293 memcpy(buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
294 rfd->rset->keycontrol->key_size);
296 *term = rfd->rset->term;
297 /* FIXME - should we store and return terms ?? */
303 static int r_write(RSFD rfd, const void *buf)
305 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
306 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
308 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
310 if (nc > info->pos_buf + info->buf_size)
313 info->pos_buf = mrfd->pos_cur;
314 if (info->pos_buf < info->pos_end)
318 memcpy(info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
319 rfd->rset->keycontrol->key_size);
321 if (nc > info->pos_end)
322 info->pos_border = info->pos_end = nc;
327 static void r_pos(RSFD rfd, double *current, double *total)
329 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
330 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
332 *current = (double) mrfd->cur;
333 *total = (double) info->hits;