* Sebastian Hammer, Adam Dickmeiss
*
* $Log: extract.c,v $
- * Revision 1.43 1995-12-11 09:12:46 adam
+ * Revision 1.48 1996-02-01 20:53:26 adam
+ * The temporary per-record keys are compacted a little, and duplication
+ * of the per-records keys are avoided when they are saved in the record
+ * information buffer.
+ *
+ * Revision 1.47 1996/01/17 14:57:48 adam
+ * Prototype changed for reader functions in extract/retrieve. File
+ * is identified by 'void *' instead of 'int.
+ *
+ * Revision 1.46 1995/12/15 14:57:16 adam
+ * Bug fix.
+ *
+ * Revision 1.45 1995/12/15 12:37:41 adam
+ * In addRecordKeyAny: Writes key only when attrSet != -1.
+ *
+ * Revision 1.44 1995/12/12 16:00:54 adam
+ * System call sync(2) used after update/commit.
+ * Locking (based on fcntl) uses F_EXLCK and F_SHLCK instead of F_WRLCK
+ * and F_RDLCK.
+ *
+ * Revision 1.43 1995/12/11 09:12:46 adam
* The rec_get function returns NULL if record doesn't exist - will
* happen in the server if the result set records have been deleted since
* the creation of the set (i.e. the search).
{
if (mem < 50000)
mem = 50000;
- logf (LOG_LOG, "key_open %d", mem);
key_buf = xmalloc (mem);
ptr_top = mem/sizeof(char*);
ptr_i = 0;
int key_close (void)
{
key_flush ();
- logf (LOG_LOG, "buf free");
xfree (key_buf);
rec_close (&records);
dict_close (matchDict);
int buf_used;
int buf_max;
char *buf;
+ char prevAttrSet;
+ short prevAttrUse;
} reckeys;
static void addRecordKey (const RecWord *p)
char attrSet;
short attrUse;
size_t i;
+ int lead = 0;
if (reckeys.buf_used+1024 > reckeys.buf_max)
{
char *b;
- b = xmalloc (reckeys.buf_max += 65000);
+ b = xmalloc (reckeys.buf_max += 128000);
if (reckeys.buf_used > 0)
memcpy (b, reckeys.buf, reckeys.buf_used);
xfree (reckeys.buf);
reckeys.buf = b;
}
dst = reckeys.buf + reckeys.buf_used;
+
+ attrSet = p->attrSet;
+ if (reckeys.buf_used > 0 && reckeys.prevAttrSet == attrSet)
+ lead |= 1;
+ else
+ reckeys.prevAttrSet = attrSet;
+ attrUse = p->attrUse;
+ if (reckeys.buf_used > 0 && reckeys.prevAttrUse == attrUse)
+ lead |= 2;
+ else
+ reckeys.prevAttrUse = attrUse;
+
switch (p->which)
{
case Word_String:
- attrSet = p->attrSet;
- memcpy (dst, &attrSet, sizeof(attrSet));
- dst += sizeof(attrSet);
+ *dst++ = lead;
- attrUse = p->attrUse;
- memcpy (dst, &attrUse, sizeof(attrUse));
- dst += sizeof(attrUse);
-
+ if (!(lead & 1))
+ {
+ memcpy (dst, &attrSet, sizeof(attrSet));
+ dst += sizeof(attrSet);
+ }
+ if (!(lead & 2))
+ {
+ memcpy (dst, &attrUse, sizeof(attrUse));
+ dst += sizeof(attrUse);
+ }
for (i = 0; p->u.string[i]; i++)
*dst++ = p->u.string[i];
*dst++ = '\0';
static void flushRecordKeys (SYSNO sysno, int cmd, struct recKeys *reckeys,
const char *databaseName)
{
+ char attrSet = -1;
+ short attrUse = -1;
int off = 0;
while (off < reckeys->buf_used)
{
const char *src = reckeys->buf + off;
- char attrSet;
- short attrUse;
struct it_key key;
-
- memcpy (&attrSet, src, sizeof(attrSet));
- src += sizeof(attrSet);
-
- memcpy (&attrUse, src, sizeof(attrUse));
- src += sizeof(attrUse);
+ int lead;
+
+ lead = *src++;
+ if (!(lead & 1))
+ {
+ memcpy (&attrSet, src, sizeof(attrSet));
+ src += sizeof(attrSet);
+ }
+ if (!(lead & 2))
+ {
+ memcpy (&attrUse, src, sizeof(attrUse));
+ src += sizeof(attrUse);
+ }
if (key_buf_used + 1024 > (ptr_top-ptr_i)*sizeof(char*))
key_flush ();
++ptr_i;
w.attrUse = 1016;
addRecordKey (&w);
}
- addRecordKey (p);
+ if (p->attrSet != -1)
+ addRecordKey (p);
}
-
#define FILE_READ_BUFSIZE 4096
-
-static int file_noread;
+struct file_read_info {
+ int file_noread;
+ int fd;
#if FILE_READ_BUFSIZE
-static char *file_buf;
-static int file_offset;
-static int file_bufsize;
+ char *file_buf;
+ int file_offset;
+ int file_bufsize;
#endif
+};
-static void file_read_start (int fd)
+static struct file_read_info *file_read_start (int fd)
{
- file_noread = 0;
+ struct file_read_info *fi = xmalloc (sizeof(*fi));
+
+ fi->fd = fd;
+ fi->file_noread = 0;
#if FILE_READ_BUFSIZE
- file_offset = 0;
- file_buf = xmalloc (FILE_READ_BUFSIZE);
- file_bufsize = read (fd, file_buf, FILE_READ_BUFSIZE);
+ fi->file_offset = 0;
+ fi->file_buf = xmalloc (FILE_READ_BUFSIZE);
+ fi->file_bufsize = read (fd, fi->file_buf, FILE_READ_BUFSIZE);
#endif
+ return fi;
}
-static void file_read_stop (int fd)
+static void file_read_stop (struct file_read_info *fi)
{
+ assert (fi);
#if FILE_READ_BUFSIZE
- xfree (file_buf);
- file_buf = NULL;
+ xfree (fi->file_buf);
+ fi->file_buf = NULL;
#endif
+ xfree (fi);
}
-static int file_read (int fd, char *buf, size_t count)
+static int file_read (void *handle, char *buf, size_t count)
{
+ struct file_read_info *p = handle;
+ int fd = p->fd;
#if FILE_READ_BUFSIZE
- int l = file_bufsize - file_offset;
+ int l = p->file_bufsize - p->file_offset;
if (count > l)
{
int r;
if (l > 0)
- memcpy (buf, file_buf + file_offset, l);
+ memcpy (buf, p->file_buf + p->file_offset, l);
count = count-l;
if (count > FILE_READ_BUFSIZE)
{
logf (LOG_FATAL|LOG_ERRNO, "read");
exit (1);
}
- file_bufsize = 0;
- file_offset = 0;
- file_noread += l+r;
+ p->file_bufsize = 0;
+ p->file_offset = 0;
+ p->file_noread += l+r;
return l+r;
}
- file_bufsize = r = read (fd, file_buf, FILE_READ_BUFSIZE);
+ p->file_bufsize = r = read (fd, p->file_buf, FILE_READ_BUFSIZE);
if (r == -1)
{
logf (LOG_FATAL|LOG_ERRNO, "read");
}
else if (r <= count)
{
- file_offset = r;
- memcpy (buf + l, file_buf, r);
- file_noread += l+r;
+ p->file_offset = r;
+ memcpy (buf + l, p->file_buf, r);
+ p->file_noread += l+r;
return l+r;
}
else
{
- file_offset = count;
- memcpy (buf + l, file_buf, count - l);
- file_noread += count;
+ p->file_offset = count;
+ memcpy (buf + l, p->file_buf, count - l);
+ p->file_noread += count;
return count;
}
}
- memcpy (buf, file_buf + file_offset, count);
- file_offset += count;
- file_noread += count;
+ memcpy (buf, p->file_buf + p->file_offset, count);
+ p->file_offset += count;
+ p->file_noread += count;
return count;
#else
int r;
r = read (fd, buf, count);
if (r > 0)
- file_noread += r;
+ p->file_noread += r;
return r;
#endif
}
static int recordExtract (SYSNO *sysno, const char *fname,
struct recordGroup *rGroup, int deleteFlag,
- int fd, RecType recType, char *subType)
+ struct file_read_info *fi, RecType recType,
+ char *subType)
{
struct recExtractCtrl extractCtrl;
int r;
SYSNO sysnotmp;
Record rec;
- if (fd != -1)
+ if (fi->fd != -1)
{
- extractCtrl.fd = fd;
+ extractCtrl.fh = fi;
/* extract keys */
extractCtrl.subType = subType;
extractCtrl.init = wordInit;
extractCtrl.add = addRecordKeyAny;
reckeys.buf_used = 0;
+ reckeys.prevAttrUse = -1;
+ reckeys.prevAttrSet = -1;
extractCtrl.readf = file_read;
r = (*recType->extract)(&extractCtrl);
xfree (rec->info[recInfo_delKeys]);
if (reckeys.buf_used > 0 && rGroup->flagStoreKeys == 1)
{
+#if 1
+ rec->size[recInfo_delKeys] = reckeys.buf_used;
+ rec->info[recInfo_delKeys] = reckeys.buf;
+ reckeys.buf = NULL;
+ reckeys.buf_max = 0;
+#else
rec->info[recInfo_delKeys] = xmalloc (reckeys.buf_used);
rec->size[recInfo_delKeys] = reckeys.buf_used;
memcpy (rec->info[recInfo_delKeys], reckeys.buf,
rec->size[recInfo_delKeys]);
+#endif
}
else
{
xfree (rec->info[recInfo_storeData]);
if (rGroup->flagStoreData == 1)
{
- rec->size[recInfo_storeData] = file_noread;
- rec->info[recInfo_storeData] = xmalloc (file_noread);
+ rec->size[recInfo_storeData] = fi->file_noread;
+ rec->info[recInfo_storeData] = xmalloc (fi->file_noread);
#if FILE_READ_BUFSIZE
- if (file_noread < FILE_READ_BUFSIZE)
- memcpy (rec->info[recInfo_storeData], file_buf, file_noread);
+ if (fi->file_noread < FILE_READ_BUFSIZE)
+ memcpy (rec->info[recInfo_storeData], fi->file_buf,
+ fi->file_noread);
else
#endif
{
- if (lseek (fd, 0L, SEEK_SET) < 0)
+ if (lseek (fi->fd, 0L, SEEK_SET) < 0)
{
logf (LOG_ERRNO|LOG_FATAL, "seek to 0 in %s", fname);
exit (1);
}
- if (read (fd, rec->info[recInfo_storeData], file_noread)
- < file_noread)
+ if (read (fi->fd, rec->info[recInfo_storeData], fi->file_noread)
+ < fi->file_noread)
{
logf (LOG_ERRNO|LOG_FATAL, "read %d bytes of %s",
- file_noread, fname);
+ fi->file_noread, fname);
exit (1);
}
}
RecType recType;
struct recordGroup rGroupM;
struct recordGroup *rGroup = &rGroupM;
+ struct file_read_info *fi;
memcpy (rGroup, rGroupP, sizeof(*rGroupP));
return 0;
}
}
- file_read_start (fd);
- recordExtract (sysno, fname, rGroup, deleteFlag, fd, recType, subType);
- file_read_stop (fd);
+ fi = file_read_start (fd);
+ recordExtract (sysno, fname, rGroup, deleteFlag, fi, recType, subType);
+ file_read_stop (fi);
if (fd != -1)
close (fd);
return 1;
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