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/* mtest6.c - memory-mapped database tester/toy */
/*
* Copyright 2011-2021 Howard Chu, Symas Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* Tests for DB splits and merges */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "lmdb.h"
#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
"%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
char dkbuf[1024];
int main(int argc,char * argv[])
{
int i = 0, j = 0, rc;
MDB_env *env;
MDB_dbi dbi;
MDB_val key, data, sdata;
MDB_txn *txn;
MDB_stat mst;
MDB_cursor *cursor;
int count;
int *values;
long kval;
char *sval;
srand(time(NULL));
E(mdb_env_create(&env));
E(mdb_env_set_mapsize(env, 10485760));
E(mdb_env_set_maxdbs(env, 4));
E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
E(mdb_txn_begin(env, NULL, 0, &txn));
E(mdb_dbi_open(txn, "id6", MDB_CREATE|MDB_INTEGERKEY, &dbi));
E(mdb_cursor_open(txn, dbi, &cursor));
E(mdb_stat(txn, dbi, &mst));
sval = calloc(1, mst.ms_psize / 4);
key.mv_size = sizeof(long);
key.mv_data = &kval;
sdata.mv_size = mst.ms_psize / 4 - 30;
sdata.mv_data = sval;
printf("Adding 12 values, should yield 3 splits\n");
for (i=0;i<12;i++) {
kval = i*5;
sprintf(sval, "%08x", kval);
data = sdata;
(void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
}
printf("Adding 12 more values, should yield 3 splits\n");
for (i=0;i<12;i++) {
kval = i*5+4;
sprintf(sval, "%08x", kval);
data = sdata;
(void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
}
printf("Adding 12 more values, should yield 3 splits\n");
for (i=0;i<12;i++) {
kval = i*5+1;
sprintf(sval, "%08x", kval);
data = sdata;
(void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
}
E(mdb_cursor_get(cursor, &key, &data, MDB_FIRST));
do {
printf("key: %p %s, data: %p %.*s\n",
key.mv_data, mdb_dkey(&key, dkbuf),
data.mv_data, (int) data.mv_size, (char *) data.mv_data);
} while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0);
CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
mdb_cursor_close(cursor);
mdb_txn_commit(txn);
#if 0
j=0;
for (i= count - 1; i > -1; i-= (rand()%5)) {
j++;
txn=NULL;
E(mdb_txn_begin(env, NULL, 0, &txn));
sprintf(kval, "%03x", values[i & ~0x0f]);
sprintf(sval, "%03x %d foo bar", values[i], values[i]);
key.mv_size = sizeof(int);
key.mv_data = kval;
data.mv_size = sizeof(sval);
data.mv_data = sval;
if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) {
j--;
mdb_txn_abort(txn);
} else {
E(mdb_txn_commit(txn));
}
}
free(values);
printf("Deleted %d values\n", j);
E(mdb_env_stat(env, &mst));
E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
E(mdb_cursor_open(txn, dbi, &cursor));
printf("Cursor next\n");
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
printf("key: %.*s, data: %.*s\n",
(int) key.mv_size, (char *) key.mv_data,
(int) data.mv_size, (char *) data.mv_data);
}
CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
printf("Cursor prev\n");
while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
printf("key: %.*s, data: %.*s\n",
(int) key.mv_size, (char *) key.mv_data,
(int) data.mv_size, (char *) data.mv_data);
}
CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
mdb_cursor_close(cursor);
mdb_txn_abort(txn);
mdb_dbi_close(env, dbi);
#endif
mdb_env_close(env);
return 0;
}
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