1 /* $Id: rstemp.c,v 1.58 2005-01-16 23:14:57 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
32 #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)
175 sprintf (template, "%s/zrsXXXXXX", info->temp_path);
177 sprintf (template, "zrsXXXXXX");
179 info->fd = mkstemp (template);
183 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: mkstemp %s", template);
186 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
187 strcpy (info->fname, template);
189 char *s = (char*) tempnam (info->temp_path, "zrs");
190 info->fname= nmem_malloc(rfd->rset->nmem,strlen(template)+1);
191 strcpy (info->fname, s);
193 yaz_log (log_level, "creating tempfile %s", info->fname);
194 info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
197 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: open %s", info->fname);
202 if (info->fname && info->fd != -1 && info->dirty)
207 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
209 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek %s", info->fname);
212 count = info->buf_size;
213 if (count > info->pos_end - info->pos_buf)
214 count = info->pos_end - info->pos_buf;
215 if ((r = write (info->fd, info->buf_mem, count)) < (int) count)
218 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: write %s", info->fname);
220 yaz_log (YLOG_FATAL, "rstemp: write of %ld but got %ld",
221 (long) count, (long) r);
228 static void r_close (RSFD rfd)
230 /*struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv; */
231 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
233 if (info->fname && info->fd != -1)
237 } /* FIXME - Is this right, don't we risk closing the file too early ?*/
238 rfd_delete_base(rfd);
243 read from file to window if file is assocated with set -
246 static void r_reread (RSFD rfd)
248 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
249 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
256 info->pos_border = mrfd->pos_cur +
258 if (info->pos_border > info->pos_end)
259 info->pos_border = info->pos_end;
260 count = info->pos_border - info->pos_buf;
263 if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
265 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek %s", info->fname);
268 if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
271 yaz_log (YLOG_FATAL|YLOG_ERRNO, "rstemp: read %s", info->fname);
273 yaz_log (YLOG_FATAL, "read of %ld but got %ld",
274 (long) count, (long) r);
280 info->pos_border = info->pos_end;
284 static int r_read (RSFD rfd, void *buf, TERMID *term)
286 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
287 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
289 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
291 if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
293 if (nc > info->pos_end)
296 info->pos_buf = mrfd->pos_cur;
299 memcpy (buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
300 rfd->rset->keycontrol->key_size);
302 *term=rfd->rset->term;
303 /* FIXME - should we store and return terms ?? */
309 static int r_write (RSFD rfd, const void *buf)
311 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
312 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
314 size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->key_size;
316 if (nc > info->pos_buf + info->buf_size)
319 info->pos_buf = mrfd->pos_cur;
320 if (info->pos_buf < info->pos_end)
324 memcpy (info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
325 rfd->rset->keycontrol->key_size);
327 if (nc > info->pos_end)
328 info->pos_border = info->pos_end = nc;
333 static void r_pos (RSFD rfd, double *current, double *total)
335 /* struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd; */
336 struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd->priv;
337 struct rset_temp_info *info = (struct rset_temp_info *)rfd->rset->priv;
339 *current=(double) mrfd->cur;
340 *total=(double) info->hits;