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/*
LibRCC - interface to BerkleyDB
Copyright (C) 2005-2008 Suren A. Chilingaryan <csa@dside.dyndns.org>
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License version 2.1 or later
as published by the Free Software Foundation.
This library 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 Lesser General Public License
for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../config.h"
#include "internal.h"
#include "rcchome.h"
#include "rccdb4.h"
#define DATABASE "autolearn.db"
db4_context rccDb4CreateContext(const char *dbpath, rcc_db4_flags flags) {
int err;
db4_context ctx;
#ifdef HAVE_DB_H
DB_ENV *dbe;
DB *db;
# if ((!defined(DB_LOG_AUTOREMOVE)) && (!defined(DB_LOG_AUTO_REMOVE)))
# ifdef DB_VERSION_MISMATCH
char stmp[160];
# endif /* DB_VERSION_MISMATCH */
# endif /* DB_LOG_AUTOREMOVE */
err = db_env_create(&dbe, 0);
if (err) return NULL;
# if defined(DB_LOG_AUTOREMOVE)
dbe->set_flags(dbe, DB_LOG_AUTOREMOVE, 1);
dbe->set_lg_max(dbe, 131072);
err = rccLock();
if (!err) {
err = dbe->open(dbe, dbpath, DB_CREATE|DB_INIT_TXN|DB_USE_ENVIRON|DB_INIT_LOCK|DB_INIT_MPOOL|DB_RECOVER, 00644);
rccUnLock();
}
# elif defined(DB_LOG_AUTO_REMOVE)
// Starting from berkeleydb 4.7 API has changed
dbe->log_set_config(dbe, DB_LOG_AUTO_REMOVE, 1);
dbe->set_lg_max(dbe, 131072);
err = rccLock();
if (!err) {
err = dbe->open(dbe, dbpath, DB_CREATE|DB_INIT_TXN|DB_USE_ENVIRON|DB_INIT_LOCK|DB_INIT_MPOOL|DB_RECOVER|DB_THREAD, 00644);
rccUnLock();
}
# else /* DB_LOG_AUTOREMOVE */
err = dbe->open(dbe, dbpath, DB_CREATE|DB_INIT_CDB|DB_INIT_MPOOL, 00644);
# ifdef DB_VERSION_MISMATCH
if (err == DB_VERSION_MISMATCH) {
if (!rccLock()) {
err = dbe->open(dbe, dbpath, DB_CREATE|DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_MPOOL|DB_INIT_TXN|DB_USE_ENVIRON|DB_PRIVATE|DB_RECOVER, 0);
dbe->close(dbe, 0);
if (err) {
err = db_env_create(&dbe, 0);
if (!err) dbe->remove(dbe, dbpath, 0);
}
rccUnLock();
} else {
err = -1;
dbe->close(dbe, 0);
}
if (err) return NULL;
if (strlen(dbpath)<128) {
sprintf(stmp, "%s/log.0000000001", dbpath);
remove(stmp);
}
err = db_env_create(&dbe, 0);
if (err) return NULL;
err = dbe->open(dbe, dbpath, DB_CREATE|DB_INIT_CDB|DB_INIT_MPOOL, 00644);
}
# endif /* DB_VERSION_MISMATCH */
# endif /* DB_LOG_AUTOREMOVE */
if (err) {
// fprintf(stderr, "BerkelyDB initialization failed: %i (%s)\n", err, db_strerror(err));
dbe->close(dbe, 0);
return NULL;
}
err = db_create(&db, dbe, 0);
if (err) {
dbe->close(dbe, 0);
return NULL;
}
err = db->open(db, NULL, DATABASE, NULL, DB_BTREE, DB_CREATE, 0);
if (err) {
db->close(db, 0);
dbe->close(dbe, 0);
return NULL;
}
#endif /* HAVE_DB_H */
ctx = (db4_context)malloc(sizeof(db4_context_s));
if (!ctx) {
#ifdef HAVE_DB_H
db->close(db, 0);
dbe->close(dbe, 0);
#endif /* HAVE_DB_H */
return NULL;
}
#ifdef HAVE_DB_H
ctx->db = db;
ctx->dbe = dbe;
#endif /* HAVE_DB_H */
ctx->flags = flags;
return ctx;
}
void rccDb4FreeContext(db4_context ctx) {
if (ctx) {
#ifdef HAVE_DB_H
ctx->db->close(ctx->db, 0);
ctx->dbe->close(ctx->dbe, 0);
#endif /* HAVE_DB_H */
free(ctx);
}
}
#ifdef HAVE_DB_H
static void rccDb4Strip(DBT *key) {
size_t size;
char *str;
str = (char*)key->data;
size = key->size;
while ((size > 0)&&((*str==' ')||(*str=='\n')||(*str==0))) {
str++;
size--;
}
while ((size > 0)&&((str[size-1]==' ')||(str[size-1]=='\n')||(str[size-1]==0))) {
size--;
}
key->size = size;
key->data = str;
}
#endif /* HAVE_DB_H */
int rccDb4SetKey(db4_context ctx, const char *orig, size_t olen, const char *string) {
#ifdef HAVE_DB_H
DBT key, data;
#endif /* HAVE_DB_H */
if ((!ctx)||(!orig)||(!string)) return -1;
#ifdef HAVE_DB_H
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = (char*)orig;
key.size = olen?olen:strlen(orig); /* No ending zero */
data.data = (char*)string;
data.size = strlen(string)+1;
rccDb4Strip(&key);
if (key.size < RCC_MIN_DB4_CHARS) return -1;
if (!ctx->db->put(ctx->db, NULL, &key, &data, 0)) return 0;
#endif /* HAVE_DB_H */
return 1;
}
char *rccDb4GetKey(db4_context ctx, const char *orig, size_t olen) {
#ifdef HAVE_DB_H
DBT key, data;
#endif /* HAVE_DB_H */
if ((!ctx)||(!orig)) return NULL;
#ifdef HAVE_DB_H
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = (char*)orig;
key.size = olen?olen:strlen(orig); /* No ending zero */
data.flags = DB_DBT_REALLOC;
rccDb4Strip(&key);
if (key.size < RCC_MIN_DB4_CHARS) return NULL;
if (!ctx->db->get(ctx->db, NULL, &key, &data, 0)) return data.data;
#endif /* HAVE_DB_H */
return NULL;
}
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