1 /* $Id: rstemp.c,v 1.59 2005-01-17 00:01:51 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>
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);
48 static const struct rset_control control =
61 const struct rset_control *rset_kind_temp = &control;
63 struct rset_temp_info {
64 int fd; /* file descriptor for temp file */
65 char *fname; /* name of temp file */
66 char *buf_mem; /* window buffer */
67 size_t buf_size; /* size of window */
68 size_t pos_end; /* last position in set */
69 size_t pos_buf; /* position of first byte in window */
70 size_t pos_border; /* position of last byte+1 in window */
71 int dirty; /* window is dirty */
72 zint hits; /* no of hits */
76 struct rset_temp_rfd {
78 size_t pos_cur; /* current position in set */
79 /* FIXME - term pos or what ?? */
80 zint cur; /* number of the current hit */
83 static int log_level=0;
84 static int log_level_initialized=0;
86 RSET rstemp_create( NMEM nmem, const struct key_control *kcontrol,
88 const char *temp_path, TERMID term)
90 RSET rnew=rset_create_base(&control, nmem, kcontrol, scope,term);
91 struct rset_temp_info *info;
92 if (!log_level_initialized)
94 log_level=yaz_log_module_level("rstemp");
95 log_level_initialized=1;
97 info = (struct rset_temp_info *) nmem_malloc(rnew->nmem, sizeof(*info));
100 info->buf_size = 4096;
101 info->buf_mem = (char *) nmem_malloc (rnew->nmem, info->buf_size);
108 info->temp_path = NULL;
110 info->temp_path = nmem_strdup(rnew->nmem, temp_path);
113 } /* rstemp_create */
115 static void r_delete (RSET ct)
117 struct rset_temp_info *info = (struct rset_temp_info*) ct->priv;
119 yaz_log (log_level, "r_delete: set size %ld", (long) info->pos_end);
122 yaz_log (log_level, "r_delete: unlink %s", info->fname);
123 unlink (info->fname);
128 static RSFD r_open (RSET ct, int flag)
130 struct rset_temp_info *info = (struct rset_temp_info *) ct->priv;
132 struct rset_temp_rfd *prfd;
134 if (info->fd == -1 && info->fname)
136 if (flag & RSETF_WRITE)
137 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
139 info->fd = open (info->fname, O_BINARY|O_RDONLY);
142 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: open failed %s", info->fname);
146 rfd = rfd_create_base(ct);
148 prfd= (struct rset_temp_rfd *) nmem_malloc(ct->nmem, sizeof(*prfd));
149 rfd->priv=(void *)prfd;
150 prfd->buf = nmem_malloc (ct->nmem,ct->keycontrol->key_size);
162 flush current window to file if file is assocated with set
164 static void r_flush (RSFD rfd, int mk)
166 /* struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info; */
167 struct rset_temp_info *info = rfd->rset->priv;
169 if (!info->fname && mk)
174 sprintf(template, "%s/zrsXXXXXX", info->temp_path);
176 sprintf(template, "zrsXXXXXX");
178 info->fd = mkstemp(template);
182 yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: mkstemp %s", template);
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);
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 %s", info->fname);
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);
225 static void r_close (RSFD rfd)
227 /*struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv; */
228 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
230 if (info->fname && info->fd != -1)
234 } /* FIXME - Is this right, don't we risk closing the file too early ?*/
235 rfd_delete_base(rfd);
240 read from file to window if file is assocated with set -
243 static void r_reread (RSFD rfd)
245 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
246 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
253 info->pos_border = mrfd->pos_cur +
255 if (info->pos_border > info->pos_end)
256 info->pos_border = info->pos_end;
257 count = info->pos_border - info->pos_buf;
260 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
262 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek %s", info->fname);
265 if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
268 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: read %s", info->fname);
270 yaz_log (YLOG_FATAL, "read of %ld but got %ld",
271 (long) count, (long) r);
277 info->pos_border = info->pos_end;
281 static int r_read (RSFD rfd, void *buf, TERMID *term)
283 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
284 struct rset_temp_info *info = (struct rset_temp_info *)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 rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
309 struct rset_temp_info *info = (struct rset_temp_info *)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 rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd; */
333 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
334 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
336 *current=(double) mrfd->cur;
337 *total=(double) info->hits;