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// util.cpp
/**
* Copyright (C) 2008 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/>.
*/
#include "stdafx.h"
#include "goodies.h"
#include "unittest.h"
vector<UnitTest*> *UnitTest::tests = 0;
Nullstream nullstream;
Logstream logstream;
boost::mutex Logstream::mutex;
unsigned occasion = 0;
unsigned once = 0;
bool goingAway = false;
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 UnitTest {
void run() {
assert( WrappingInt(0) <= WrappingInt(0) );
assert( WrappingInt(0) <= WrappingInt(1) );
assert( !(WrappingInt(1) <= WrappingInt(0)) );
assert( (WrappingInt(0xf0000000) <= WrappingInt(0)) );
assert( (WrappingInt(0xf0000000) <= WrappingInt(9000)) );
assert( !(WrappingInt(300) <= WrappingInt(0xe0000000)) );
assert( tdiff(3, 4) == 1 );
assert( tdiff(4, 3) == -1 );
assert( tdiff(0xffffffff, 0) == 1 );
assert( isPrime(3) );
assert( isPrime(2) );
assert( isPrime(13) );
assert( isPrime(17) );
assert( !isPrime(9) );
assert( !isPrime(6) );
assert( nextPrime(4) == 5 );
assert( nextPrime(8) == 11 );
assert( endsWith("abcde", "de") );
assert( !endsWith("abcde", "dasdfasdfashkfde") );
assert( swapEndian(0x01020304) == 0x04030201 );
}
} utilTest;
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