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/* This file is part of the Zebra server.
Copyright (C) Index Data
Zebra is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "dict-p.h"
static void dict_copy_page(Dict dict, char *to_p, char *from_p, int *map)
{
int i, slen, no = 0;
short *from_indxp, *to_indxp;
char *from_info, *to_info;
from_indxp = (short*) ((char*) from_p+DICT_bsize(from_p));
to_indxp = (short*) ((char*) to_p+DICT_bsize(to_p));
to_info = (char*) to_p + DICT_infoffset;
for (i = DICT_nodir(from_p); --i >= 0; )
{
if (*--from_indxp > 0) /* tail string here! */
{
/* string (Dict_char *) DICT_EOS terminated */
/* unsigned char length of information */
/* char * information */
from_info = (char*) from_p + *from_indxp;
*--to_indxp = to_info - to_p;
slen = (dict_strlen((Dict_char*) from_info)+1)*sizeof(Dict_char);
memcpy(to_info, from_info, slen);
from_info += slen;
to_info += slen;
}
else
{
Dict_ptr subptr;
Dict_char subchar;
/* Dict_ptr subptr */
/* Dict_char sub char */
/* unsigned char length of information */
/* char * information */
*--to_indxp = -(to_info - to_p);
from_info = (char*) from_p - *from_indxp;
memcpy(&subptr, from_info, sizeof(subptr));
subptr = map[subptr];
from_info += sizeof(Dict_ptr);
memcpy(&subchar, from_info, sizeof(subchar));
from_info += sizeof(Dict_char);
memcpy(to_info, &subptr, sizeof(Dict_ptr));
to_info += sizeof(Dict_ptr);
memcpy(to_info, &subchar, sizeof(Dict_char));
to_info += sizeof(Dict_char);
}
assert(to_info < (char*) to_indxp);
slen = *from_info+1;
memcpy(to_info, from_info, slen);
to_info += slen;
++no;
}
DICT_size(to_p) = to_info - to_p;
DICT_type(to_p) = 0;
DICT_nodir(to_p) = no;
}
int dict_copy_compact(BFiles bfs, const char *from_name, const char *to_name)
{
int no_dir = 0;
Dict dict_from, dict_to;
int *map, i;
dict_from = dict_open(bfs, from_name, 0, 0, 0, 4096);
if (!dict_from)
return -1;
map = (int *) xmalloc((dict_from->head.last+1) * sizeof(*map));
for (i = 0; i <= (int)(dict_from->head.last); i++)
map[i] = -1;
dict_to = dict_open(bfs, to_name, 0, 1, 1, 4096);
if (!dict_to)
return -1;
map[0] = 0;
map[1] = dict_from->head.page_size;
for (i = 1; i < (int) (dict_from->head.last); i++)
{
void *buf;
int size;
#if 0
yaz_log(YLOG_LOG, "map[%d] = %d", i, map[i]);
#endif
dict_bf_readp(dict_from->dbf, i, &buf);
size = ((DICT_size(buf)+sizeof(short)-1)/sizeof(short) +
DICT_nodir(buf))*sizeof(short);
map[i+1] = map[i] + size;
no_dir += DICT_nodir(buf);
}
#if 0
yaz_log(YLOG_LOG, "map[%d] = %d", i, map[i]);
yaz_log(YLOG_LOG, "nodir = %d", no_dir);
#endif
dict_to->head.root = map[1];
dict_to->head.last = map[i];
for (i = 1; i< (int) (dict_from->head.last); i++)
{
void *old_p, *new_p;
dict_bf_readp(dict_from->dbf, i, &old_p);
yaz_log(YLOG_LOG, "dict_bf_newp no=%d size=%d", map[i],
map[i+1] - map[i]);
dict_bf_newp(dict_to->dbf, map[i], &new_p, map[i+1] - map[i]);
DICT_type(new_p) = 0;
DICT_backptr(new_p) = map[i-1];
DICT_bsize(new_p) = map[i+1] - map[i];
dict_copy_page(dict_from, (char*) new_p, (char*) old_p, map);
}
dict_close(dict_from);
dict_close(dict_to);
return 0;
}
/*
* Local variables:
* c-basic-offset: 4
* c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
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