bitcoin/src/test/scriptnum_tests.cpp at master · 110CodingP/bitcoin · GitHub

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// Copyright (c) 2012-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include<script/script.h>
#include<test/scriptnum10.h>
#include<test/util/setup_common.h>

#include<boost/test/unit_test.hpp>
#include<climits>
#include<cstdint>

BOOST_FIXTURE_TEST_SUITE(scriptnum_tests, BasicTestingSetup)

/** A selection of numbers that do not trigger int64_t overflow
 * when added/subtracted. */
staticconstint64_t values[] = { 0, 1, -2, 127, 128, -255, 256, (1LL << 15) - 1, -(1LL << 16), (1LL << 24) - 1, (1LL << 31), 1 - (1LL << 32), 1LL << 40 };

staticconstint64_t offsets[] = { 1, 0x79, 0x80, 0x81, 0xFF, 0x7FFF, 0x8000, 0xFFFF, 0x10000};

staticboolverify(const CScriptNum10& bignum, const CScriptNum& scriptnum)
{
return bignum.getvch() == scriptnum.getvch() && bignum.getint() == scriptnum.getint();
}

staticvoidCheckCreateVch(constint64_t& num)
{
 CScriptNum10 bignum(num);
 CScriptNum scriptnum(num);
BOOST_CHECK(verify(bignum, scriptnum));

 CScriptNum10 bignum2(bignum.getvch(), false);
 CScriptNum scriptnum2(scriptnum.getvch(), false);
BOOST_CHECK(verify(bignum2, scriptnum2));

 CScriptNum10 bignum3(scriptnum2.getvch(), false);
 CScriptNum scriptnum3(bignum2.getvch(), false);
BOOST_CHECK(verify(bignum3, scriptnum3));
}

staticvoidCheckCreateInt(constint64_t& num)
{
 CScriptNum10 bignum(num);
 CScriptNum scriptnum(num);
BOOST_CHECK(verify(bignum, scriptnum));
BOOST_CHECK(verify(CScriptNum10(bignum.getint()), CScriptNum(scriptnum.getint())));
BOOST_CHECK(verify(CScriptNum10(scriptnum.getint()), CScriptNum(bignum.getint())));
BOOST_CHECK(verify(CScriptNum10(CScriptNum10(scriptnum.getint()).getint()), CScriptNum(CScriptNum(bignum.getint()).getint())));
}


staticvoidCheckAdd(constint64_t& num1, constint64_t& num2)
{
const CScriptNum10 bignum1(num1);
const CScriptNum10 bignum2(num2);
const CScriptNum scriptnum1(num1);
const CScriptNum scriptnum2(num2);
 CScriptNum10 bignum3(num1);
 CScriptNum10 bignum4(num1);
 CScriptNum scriptnum3(num1);
 CScriptNum scriptnum4(num1);

// int64_t overflow is undefined.
bool invalid = (((num2 > 0) && (num1 > (std::numeric_limits<int64_t>::max() - num2))) ||
 ((num2 < 0) && (num1 < (std::numeric_limits<int64_t>::min() - num2))));
if (!invalid)
 {
BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + scriptnum2));
BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + num2));
BOOST_CHECK(verify(bignum1 + bignum2, scriptnum2 + num1));
 }
}

staticvoidCheckNegate(constint64_t& num)
{
const CScriptNum10 bignum(num);
const CScriptNum scriptnum(num);

// -INT64_MIN is undefined
if (num != std::numeric_limits<int64_t>::min())
BOOST_CHECK(verify(-bignum, -scriptnum));
}

staticvoidCheckSubtract(constint64_t& num1, constint64_t& num2)
{
const CScriptNum10 bignum1(num1);
const CScriptNum10 bignum2(num2);
const CScriptNum scriptnum1(num1);
const CScriptNum scriptnum2(num2);

// int64_t overflow is undefined.
bool invalid = ((num2 > 0 && num1 < std::numeric_limits<int64_t>::min() + num2) ||
 (num2 < 0 && num1 > std::numeric_limits<int64_t>::max() + num2));
if (!invalid)
 {
BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - scriptnum2));
BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - num2));
 }

 invalid = ((num1 > 0 && num2 < std::numeric_limits<int64_t>::min() + num1) ||
 (num1 < 0 && num2 > std::numeric_limits<int64_t>::max() + num1));
if (!invalid)
 {
BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - scriptnum1));
BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - num1));
 }
}

staticvoidCheckCompare(constint64_t& num1, constint64_t& num2)
{
const CScriptNum10 bignum1(num1);
const CScriptNum10 bignum2(num2);
const CScriptNum scriptnum1(num1);
const CScriptNum scriptnum2(num2);

BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == scriptnum1));
BOOST_CHECK((bignum1 != bignum1) == (scriptnum1 != scriptnum1));
BOOST_CHECK((bignum1 < bignum1) == (scriptnum1 < scriptnum1));
BOOST_CHECK((bignum1 > bignum1) == (scriptnum1 > scriptnum1));
BOOST_CHECK((bignum1 >= bignum1) == (scriptnum1 >= scriptnum1));
BOOST_CHECK((bignum1 <= bignum1) == (scriptnum1 <= scriptnum1));

BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == num1));
BOOST_CHECK((bignum1 != bignum1) == (scriptnum1 != num1));
BOOST_CHECK((bignum1 < bignum1) == (scriptnum1 < num1));
BOOST_CHECK((bignum1 > bignum1) == (scriptnum1 > num1));
BOOST_CHECK((bignum1 >= bignum1) == (scriptnum1 >= num1));
BOOST_CHECK((bignum1 <= bignum1) == (scriptnum1 <= num1));

BOOST_CHECK((bignum1 == bignum2) == (scriptnum1 == scriptnum2));
BOOST_CHECK((bignum1 != bignum2) == (scriptnum1 != scriptnum2));
BOOST_CHECK((bignum1 < bignum2) == (scriptnum1 < scriptnum2));
BOOST_CHECK((bignum1 > bignum2) == (scriptnum1 > scriptnum2));
BOOST_CHECK((bignum1 >= bignum2) == (scriptnum1 >= scriptnum2));
BOOST_CHECK((bignum1 <= bignum2) == (scriptnum1 <= scriptnum2));

BOOST_CHECK((bignum1 == bignum2) == (scriptnum1 == num2));
BOOST_CHECK((bignum1 != bignum2) == (scriptnum1 != num2));
BOOST_CHECK((bignum1 < bignum2) == (scriptnum1 < num2));
BOOST_CHECK((bignum1 > bignum2) == (scriptnum1 > num2));
BOOST_CHECK((bignum1 >= bignum2) == (scriptnum1 >= num2));
BOOST_CHECK((bignum1 <= bignum2) == (scriptnum1 <= num2));
}

staticvoidRunCreate(constint64_t& num)
{
CheckCreateInt(num);
 CScriptNum scriptnum(num);
if (scriptnum.getvch().size() <= CScriptNum::nDefaultMaxNumSize)
CheckCreateVch(num);
else
 {
BOOST_CHECK_THROW (CheckCreateVch(num), scriptnum10_error);
 }
}

staticvoidRunOperators(constint64_t& num1, constint64_t& num2)
{
CheckAdd(num1, num2);
CheckSubtract(num1, num2);
CheckNegate(num1);
CheckCompare(num1, num2);
}

BOOST_AUTO_TEST_CASE(creation)
{
for(size_t i = 0; i < std::size(values); ++i)
 {
for(size_t j = 0; j < std::size(offsets); ++j)
 {
RunCreate(values[i]);
RunCreate(values[i] + offsets[j]);
RunCreate(values[i] - offsets[j]);
 }
 }
}

BOOST_AUTO_TEST_CASE(operators)
{
for(size_t i = 0; i < std::size(values); ++i)
 {
for(size_t j = 0; j < std::size(offsets); ++j)
 {
RunOperators(values[i], values[i]);
RunOperators(values[i], -values[i]);
RunOperators(values[i], values[j]);
RunOperators(values[i], -values[j]);
RunOperators(values[i] + values[j], values[j]);
RunOperators(values[i] + values[j], -values[j]);
RunOperators(values[i] - values[j], values[j]);
RunOperators(values[i] - values[j], -values[j]);
RunOperators(values[i] + values[j], values[i] + values[j]);
RunOperators(values[i] + values[j], values[i] - values[j]);
RunOperators(values[i] - values[j], values[i] + values[j]);
RunOperators(values[i] - values[j], values[i] - values[j]);
 }
 }
}

BOOST_AUTO_TEST_SUITE_END()