summaryrefslogtreecommitdiffstats
path: root/src/rccdb4.c
blob: 738952b39ce2227bc17ef7e5bf5a194e746d6ddd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/*
  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.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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) {
    db4_context ctx;

    if (!dbpath) return NULL;

    ctx = (db4_context)malloc(sizeof(db4_context_s));
    if (!ctx) return NULL;

    memset(ctx, 0, sizeof(db4_context_s));
    ctx->dbpath = strdup(dbpath);
    ctx->flags = flags;

    if (!ctx->dbpath) {
        free(ctx);
        return NULL;
    }

    return ctx;
}

static int rccDb4InitContext(db4_context ctx, const char *dbpath, rcc_db4_flags flags) {
    int err;

    if (ctx->initialized) {
        if ((ctx->dbe)&&(ctx->db)) return 0;
        return -1;
    }

    err = rccLock();
    if (err) return -1;

    if (ctx->initialized) {
        if ((ctx->dbe)&&(ctx->db)) return 0;
        return -1;
    }

    ctx->initialized = 1;
    rccUnLock();

#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 -1;

# 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 -1;

	if (strlen(dbpath)<128) {
	    sprintf(stmp, "%s/log.0000000001", dbpath);
	    remove(stmp);
	}
	    
	err = db_env_create(&dbe, 0);
	if (err) return -1;
	    
	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 -1;
    }
    
    err = db_create(&db, dbe, 0);
    if (err) {
	dbe->close(dbe, 0);
	return -1;
    }
    

    err = db->open(db, NULL, DATABASE, NULL, DB_BTREE, DB_CREATE, 0);
    if (err) {
	db->close(db, 0);
	dbe->close(dbe, 0);
	return -1;
    } 
#endif /* HAVE_DB_H */

#ifdef HAVE_DB_H
    ctx->db = db;
    ctx->dbe = dbe;
#endif /* HAVE_DB_H */

    return 0;
}

void rccDb4FreeContext(db4_context ctx) {
    if (ctx) {
#ifdef HAVE_DB_H
	if (ctx->db) ctx->db->close(ctx->db, 0);
	if (ctx->dbe) ctx->dbe->close(ctx->dbe, 0);
	if (ctx->dbpath) free(ctx->dbpath);
#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;
    if (rccDb4InitContext(ctx, ctx->dbpath, ctx->flags)) 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;
    if (rccDb4InitContext(ctx, ctx->dbpath, ctx->flags)) 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;
}