1 /* This file is part of the Zebra server.
2 Copyright (C) 1994-2009 Index Data
4 Zebra is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
31 #include <sys/types.h>
33 #include <idzebra/util.h>
36 static RSFD r_open(RSET ct, int flag);
37 static void r_close(RSFD rfd);
38 static void r_delete(RSET ct);
39 static int r_read(RSFD rfd, void *buf, TERMID *term);
40 static int r_write(RSFD rfd, const void *buf);
41 static void r_pos(RSFD rfd, double *current, double *total);
42 static void r_flush(RSFD rfd, int mk);
43 static void r_reread(RSFD rfd);
45 static const struct rset_control control =
59 int fd; /* file descriptor for temp file */
60 char *fname; /* name of temp file */
61 char *buf_mem; /* window buffer */
62 size_t buf_size; /* size of window */
63 size_t pos_end; /* last position in set */
64 size_t pos_buf; /* position of first byte in window */
65 size_t pos_border; /* position of last byte+1 in window */
66 int dirty; /* window is dirty */
67 zint hits; /* no of hits */
73 size_t pos_cur; /* current position in set */
74 /* FIXME - term pos or what ?? */
75 zint cur; /* number of the current hit */
78 static int log_level = 0;
79 static int log_level_initialized = 0;
81 RSET rset_create_temp(NMEM nmem, struct rset_key_control *kcontrol,
82 int scope, const char *temp_path, TERMID term)
84 RSET rnew = rset_create_base(&control, nmem, kcontrol, scope, term,
86 struct rset_private *info;
87 if (!log_level_initialized)
89 log_level = yaz_log_module_level("rstemp");
90 log_level_initialized = 1;
92 info = (struct rset_private *) nmem_malloc(rnew->nmem, sizeof(*info));
95 info->buf_size = 4096;
96 info->buf_mem = (char *) nmem_malloc(rnew->nmem, info->buf_size);
103 info->temp_path = NULL;
105 info->temp_path = nmem_strdup(rnew->nmem, temp_path);
108 } /* rstemp_create */
110 static void r_delete(RSET ct)
112 struct rset_private *info = (struct rset_private*) ct->priv;
114 yaz_log(log_level, "r_delete: set size %ld", (long) info->pos_end);
117 yaz_log(log_level, "r_delete: unlink %s", info->fname);
122 static RSFD r_open(RSET ct, int flag)
124 struct rset_private *info = (struct rset_private *) ct->priv;
126 struct rfd_private *prfd;
128 if (info->fd == -1 && info->fname)
130 if (flag & RSETF_WRITE)
131 info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
133 info->fd = open(info->fname, O_BINARY|O_RDONLY);
136 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open failed %s", info->fname);
137 zebra_exit("r_open");
140 rfd = rfd_create_base(ct);
143 prfd = (struct rfd_private *) nmem_malloc(ct->nmem, sizeof(*prfd));
144 rfd->priv = (void *)prfd;
145 prfd->buf = nmem_malloc(ct->nmem,ct->keycontrol->key_size);
158 flush current window to file if file is assocated with set
160 static void r_flush(RSFD rfd, int mk)
162 struct rset_private *info = rfd->rset->priv;
164 if (!info->fname && mk)
172 sprintf(template, "%s/", info->temp_path);
173 strcat(template, "zrs_");
175 sprintf(template + strlen(template), "%ld_", (long) getpid());
177 strcat(template, "XXXXXX");
179 info->fd = mkstemp(template);
182 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: mkstemp %s", template);
183 zebra_exit("r_flush");
185 info->fname = nmem_strdup(rfd->rset->nmem, template);
187 char *s = (char*) tempnam(info->temp_path, "zrs");
188 info->fname= nmem_strdup(rfd->rset->nmem, s);
190 yaz_log(log_level, "creating tempfile %s", info->fname);
191 info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
194 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open %s", info->fname);
195 zebra_exit("r_flush");
199 if (info->fname && info->fd != -1 && info->dirty)
204 if (lseek(info->fd, info->pos_buf, SEEK_SET) == -1)
206 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (1) %s", info->fname);
207 zebra_exit("r_flusxh");
209 count = info->buf_size;
210 if (count > info->pos_end - info->pos_buf)
211 count = info->pos_end - info->pos_buf;
212 if ((r = write(info->fd, info->buf_mem, count)) < (int) count)
215 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: write %s", info->fname);
217 yaz_log(YLOG_FATAL, "rstemp: write of %ld but got %ld",
218 (long) count, (long) r);
219 zebra_exit("r_flush");
225 static void r_close(RSFD rfd)
227 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
228 if (rfd_is_last(rfd))
231 if (info->fname && info->fd != -1)
241 read from file to window if file is assocated with set -
244 static void r_reread(RSFD rfd)
246 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
247 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
254 info->pos_border = mrfd->pos_cur +
256 if (info->pos_border > info->pos_end)
257 info->pos_border = info->pos_end;
258 count = info->pos_border - info->pos_buf;
261 if (lseek(info->fd, info->pos_buf, SEEK_SET) == -1)
263 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (2) %s fd=%d", info->fname, info->fd);
264 zebra_exit("r_reread");
266 if ((r = read(info->fd, info->buf_mem, count)) < (int) count)
269 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: read %s", info->fname);
271 yaz_log(YLOG_FATAL, "read of %ld but got %ld",
272 (long) count, (long) r);
273 zebra_exit("r_reread");
278 info->pos_border = info->pos_end;
281 static int r_read(RSFD rfd, void *buf, TERMID *term)
283 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
284 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
286 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
288 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
290 if (nc > info->pos_end)
293 info->pos_buf = mrfd->pos_cur;
296 memcpy(buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
297 rfd->rset->keycontrol->key_size);
299 *term = rfd->rset->term;
300 /* FIXME - should we store and return terms ?? */
306 static int r_write(RSFD rfd, const void *buf)
308 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
309 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
311 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
313 if (nc > info->pos_buf + info->buf_size)
316 info->pos_buf = mrfd->pos_cur;
317 if (info->pos_buf < info->pos_end)
321 memcpy(info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
322 rfd->rset->keycontrol->key_size);
324 if (nc > info->pos_end)
325 info->pos_border = info->pos_end = nc;
330 static void r_pos(RSFD rfd, double *current, double *total)
332 struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
333 struct rset_private *info = (struct rset_private *)rfd->rset->priv;
335 *current = (double) mrfd->cur;
336 *total = (double) info->hits;
341 * c-file-style: "Stroustrup"
342 * indent-tabs-mode: nil
344 * vim: shiftwidth=4 tabstop=8 expandtab