%description:
Test the shift operator in NED expressions (they are implemented
with cDynamicExpression). 64-bit signed arithmetic.

%global:

void test(const char *expr)
{
    cDynamicExpression e;
    e.parse(expr);
    std::string result;
    try {
        cNedValue v = e.evaluate();
        result = v.str();
    } catch (std::exception& e) {
        result = e.what();
    }
    EV << expr << " ==> " << result << "\n";
}

void test(const char *s1, const std::string& s2, const char *s3)
{
    test((std::string(s1) + " " + s2 + " " + s3).c_str());
}

%activity:
// left-shift, normal usage
test("1<<0");
test("1<<1");
test("1<<16");
test("1<<62");
test("1<<63");

// shift by 64 or more places
test("1<<64");
test("1<<10000");

// negative shift shifts right
test("4<<-1");
test("4<<-2");
test("4<<-3");

// negative shift by 64 or more places
test("2<<-64");
test("2<<-10000");

// negative values
test("-1<<1");
test("-1<<16");
test("-1<<62");
test("-1<<63");

// shifting negative values by 64 or more places
test("-1<<64");

// negative shift of negative values
test("-4<<-1");
test("-4<<-2");
test("-4<<-3");
test("-4<<-4");
test("-4<<-64");

EV << "====================\n";

// right-shift, normal usage
test("4>>0");
test("4>>1");
test("4>>2");
test("4>>3");

// shift by 64 or more places
test("4>>64");
test("4>>10000");

// negative shift shifts left
test("1>>-1");
test("1>>-2");
test("1>>-62");
test("1>>-63");

// negative shift by 64 or more places
test("1>>-64");
test("1>>-10000");

// negative values
test("-4>>1");
test("-4>>2");
test("-4>>3");
test("-4>>63");

// shifting negative values by 64 or more places
test("-1>>64");

// negative shift of negative values
test("-1>>-1");
test("-1>>-2");
test("-1>>-3");
test("-1>>-63");
test("-1>>-64");

EV << ".\n";

%contains: stdout
1<<0 ==> 1
1<<1 ==> 2
1<<16 ==> 65536
1<<62 ==> 4611686018427387904
1<<63 ==> -9223372036854775808
1<<64 ==> 0
1<<10000 ==> 0
4<<-1 ==> 2
4<<-2 ==> 1
4<<-3 ==> 0
2<<-64 ==> 0
2<<-10000 ==> 0
-1<<1 ==> -2
-1<<16 ==> -65536
-1<<62 ==> -4611686018427387904
-1<<63 ==> -9223372036854775808
-1<<64 ==> 0
-4<<-1 ==> -2
-4<<-2 ==> -1
-4<<-3 ==> -1
-4<<-4 ==> -1
-4<<-64 ==> -1
====================
4>>0 ==> 4
4>>1 ==> 2
4>>2 ==> 1
4>>3 ==> 0
4>>64 ==> 0
4>>10000 ==> 0
1>>-1 ==> 2
1>>-2 ==> 4
1>>-62 ==> 4611686018427387904
1>>-63 ==> -9223372036854775808
1>>-64 ==> 0
1>>-10000 ==> 0
-4>>1 ==> -2
-4>>2 ==> -1
-4>>3 ==> -1
-4>>63 ==> -1
-1>>64 ==> -1
-1>>-1 ==> -2
-1>>-2 ==> -4
-1>>-3 ==> -8
-1>>-63 ==> -9223372036854775808
-1>>-64 ==> 0
.