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/*
LibRCC - interface to BerkleyDB
Copyright (C) 2005-2008 Suren A. Chilingaryan <csa@dside.dyndns.org>
This program is free software; you can redistribute it and/or modify it
under the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation.
This program 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.,
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;
# ifndef DB_LOG_AUTOREMOVE
# 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;
# ifdef 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();
}
# 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);
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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