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// @file util.cpp
/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/pch.h"
#include <iomanip>
#include "mongo/platform/atomic_word.h"
#include "mongo/util/concurrency/mutex.h"
#include "mongo/util/goodies.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/stacktrace.h"
#include "mongo/util/startup_test.h"
#include "mongo/util/time_support.h"
#include "mongo/util/timer.h"
namespace mongo {
string hexdump(const char *data, unsigned len) {
verify( len < 1000000 );
const unsigned char *p = (const unsigned char *) data;
stringstream ss;
ss << std::hex << setw(2) << setfill('0');
for( unsigned i = 0; i < len; i++ ) {
ss << static_cast<unsigned>(p[i]) << ' ';
}
string s = ss.str();
return s;
}
bool isPrime(int n) {
int z = 2;
while ( 1 ) {
if ( z*z > n )
break;
if ( n % z == 0 )
return false;
z++;
}
return true;
}
int nextPrime(int n) {
n |= 1; // 2 goes to 3...don't care...
while ( !isPrime(n) )
n += 2;
return n;
}
struct UtilTest : public StartupTest {
void run() {
verify( isPrime(3) );
verify( isPrime(2) );
verify( isPrime(13) );
verify( isPrime(17) );
verify( !isPrime(9) );
verify( !isPrime(6) );
verify( nextPrime(4) == 5 );
verify( nextPrime(8) == 11 );
verify( endsWith("abcde", "de") );
verify( !endsWith("abcde", "dasdfasdfashkfde") );
}
} utilTest;
ostream& operator<<( ostream &s, const ThreadSafeString &o ) {
s << o.toString();
return s;
}
bool StaticObserver::_destroyingStatics = false;
} // namespace mongo
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