200 lines
7.3 KiB
C++
200 lines
7.3 KiB
C++
// Copyright (c) 2012-2015 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "scriptnum10.h"
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#include "script/script.h"
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#include "test/test_bitcoin.h"
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#include <boost/test/unit_test.hpp>
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#include <limits.h>
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#include <stdint.h>
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BOOST_FIXTURE_TEST_SUITE(scriptnum_tests, BasicTestingSetup)
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/** A selection of numbers that do not trigger int64_t overflow
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* when added/subtracted. */
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static const int64_t values[] = { 0, 1, -2, 127, 128, -255, 256, (1LL << 15) - 1, -(1LL << 16), (1LL << 24) - 1, (1LL << 31), 1 - (1LL << 32), 1LL << 40 };
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static const int64_t offsets[] = { 1, 0x79, 0x80, 0x81, 0xFF, 0x7FFF, 0x8000, 0xFFFF, 0x10000};
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static bool verify(const CScriptNum10& bignum, const CScriptNum& scriptnum)
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{
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return bignum.getvch() == scriptnum.getvch() && bignum.getint() == scriptnum.getint();
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}
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static void CheckCreateVch(const int64_t& num)
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{
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CScriptNum10 bignum(num);
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CScriptNum scriptnum(num);
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BOOST_CHECK(verify(bignum, scriptnum));
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CScriptNum10 bignum2(bignum.getvch(), false);
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CScriptNum scriptnum2(scriptnum.getvch(), false);
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BOOST_CHECK(verify(bignum2, scriptnum2));
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CScriptNum10 bignum3(scriptnum2.getvch(), false);
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CScriptNum scriptnum3(bignum2.getvch(), false);
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BOOST_CHECK(verify(bignum3, scriptnum3));
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}
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static void CheckCreateInt(const int64_t& num)
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{
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CScriptNum10 bignum(num);
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CScriptNum scriptnum(num);
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BOOST_CHECK(verify(bignum, scriptnum));
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BOOST_CHECK(verify(CScriptNum10(bignum.getint()), CScriptNum(scriptnum.getint())));
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BOOST_CHECK(verify(CScriptNum10(scriptnum.getint()), CScriptNum(bignum.getint())));
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BOOST_CHECK(verify(CScriptNum10(CScriptNum10(scriptnum.getint()).getint()), CScriptNum(CScriptNum(bignum.getint()).getint())));
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}
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static void CheckAdd(const int64_t& num1, const int64_t& num2)
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{
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const CScriptNum10 bignum1(num1);
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const CScriptNum10 bignum2(num2);
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const CScriptNum scriptnum1(num1);
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const CScriptNum scriptnum2(num2);
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CScriptNum10 bignum3(num1);
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CScriptNum10 bignum4(num1);
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CScriptNum scriptnum3(num1);
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CScriptNum scriptnum4(num1);
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// int64_t overflow is undefined.
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bool invalid = (((num2 > 0) && (num1 > (std::numeric_limits<int64_t>::max() - num2))) ||
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((num2 < 0) && (num1 < (std::numeric_limits<int64_t>::min() - num2))));
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if (!invalid)
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{
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BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + scriptnum2));
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BOOST_CHECK(verify(bignum1 + bignum2, scriptnum1 + num2));
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BOOST_CHECK(verify(bignum1 + bignum2, scriptnum2 + num1));
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}
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}
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static void CheckNegate(const int64_t& num)
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{
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const CScriptNum10 bignum(num);
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const CScriptNum scriptnum(num);
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// -INT64_MIN is undefined
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if (num != std::numeric_limits<int64_t>::min())
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BOOST_CHECK(verify(-bignum, -scriptnum));
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}
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static void CheckSubtract(const int64_t& num1, const int64_t& num2)
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{
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const CScriptNum10 bignum1(num1);
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const CScriptNum10 bignum2(num2);
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const CScriptNum scriptnum1(num1);
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const CScriptNum scriptnum2(num2);
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// int64_t overflow is undefined.
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bool invalid = ((num2 > 0 && num1 < std::numeric_limits<int64_t>::min() + num2) ||
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(num2 < 0 && num1 > std::numeric_limits<int64_t>::max() + num2));
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if (!invalid)
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{
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BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - scriptnum2));
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BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - num2));
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}
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invalid = ((num1 > 0 && num2 < std::numeric_limits<int64_t>::min() + num1) ||
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(num1 < 0 && num2 > std::numeric_limits<int64_t>::max() + num1));
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if (!invalid)
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{
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BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - scriptnum1));
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BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - num1));
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}
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}
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static void CheckCompare(const int64_t& num1, const int64_t& num2)
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{
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const CScriptNum10 bignum1(num1);
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const CScriptNum10 bignum2(num2);
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const CScriptNum scriptnum1(num1);
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const CScriptNum scriptnum2(num2);
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BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == scriptnum1));
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BOOST_CHECK((bignum1 != bignum1) == (scriptnum1 != scriptnum1));
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BOOST_CHECK((bignum1 < bignum1) == (scriptnum1 < scriptnum1));
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BOOST_CHECK((bignum1 > bignum1) == (scriptnum1 > scriptnum1));
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BOOST_CHECK((bignum1 >= bignum1) == (scriptnum1 >= scriptnum1));
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BOOST_CHECK((bignum1 <= bignum1) == (scriptnum1 <= scriptnum1));
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BOOST_CHECK((bignum1 == bignum1) == (scriptnum1 == num1));
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BOOST_CHECK((bignum1 != bignum1) == (scriptnum1 != num1));
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BOOST_CHECK((bignum1 < bignum1) == (scriptnum1 < num1));
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BOOST_CHECK((bignum1 > bignum1) == (scriptnum1 > num1));
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BOOST_CHECK((bignum1 >= bignum1) == (scriptnum1 >= num1));
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BOOST_CHECK((bignum1 <= bignum1) == (scriptnum1 <= num1));
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BOOST_CHECK((bignum1 == bignum2) == (scriptnum1 == scriptnum2));
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BOOST_CHECK((bignum1 != bignum2) == (scriptnum1 != scriptnum2));
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BOOST_CHECK((bignum1 < bignum2) == (scriptnum1 < scriptnum2));
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BOOST_CHECK((bignum1 > bignum2) == (scriptnum1 > scriptnum2));
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BOOST_CHECK((bignum1 >= bignum2) == (scriptnum1 >= scriptnum2));
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BOOST_CHECK((bignum1 <= bignum2) == (scriptnum1 <= scriptnum2));
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BOOST_CHECK((bignum1 == bignum2) == (scriptnum1 == num2));
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BOOST_CHECK((bignum1 != bignum2) == (scriptnum1 != num2));
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BOOST_CHECK((bignum1 < bignum2) == (scriptnum1 < num2));
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BOOST_CHECK((bignum1 > bignum2) == (scriptnum1 > num2));
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BOOST_CHECK((bignum1 >= bignum2) == (scriptnum1 >= num2));
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BOOST_CHECK((bignum1 <= bignum2) == (scriptnum1 <= num2));
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}
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static void RunCreate(const int64_t& num)
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{
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CheckCreateInt(num);
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CScriptNum scriptnum(num);
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if (scriptnum.getvch().size() <= CScriptNum::nDefaultMaxNumSize)
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CheckCreateVch(num);
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else
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{
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BOOST_CHECK_THROW (CheckCreateVch(num), scriptnum10_error);
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}
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}
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static void RunOperators(const int64_t& num1, const int64_t& num2)
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{
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CheckAdd(num1, num2);
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CheckSubtract(num1, num2);
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CheckNegate(num1);
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CheckCompare(num1, num2);
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}
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BOOST_AUTO_TEST_CASE(creation)
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{
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for(size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i)
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{
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for(size_t j = 0; j < sizeof(offsets) / sizeof(offsets[0]); ++j)
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{
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RunCreate(values[i]);
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RunCreate(values[i] + offsets[j]);
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RunCreate(values[i] - offsets[j]);
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}
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}
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}
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BOOST_AUTO_TEST_CASE(operators)
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{
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for(size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i)
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{
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for(size_t j = 0; j < sizeof(offsets) / sizeof(offsets[0]); ++j)
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{
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RunOperators(values[i], values[i]);
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RunOperators(values[i], -values[i]);
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RunOperators(values[i], values[j]);
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RunOperators(values[i], -values[j]);
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RunOperators(values[i] + values[j], values[j]);
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RunOperators(values[i] + values[j], -values[j]);
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RunOperators(values[i] - values[j], values[j]);
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RunOperators(values[i] - values[j], -values[j]);
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RunOperators(values[i] + values[j], values[i] + values[j]);
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RunOperators(values[i] + values[j], values[i] - values[j]);
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RunOperators(values[i] - values[j], values[i] + values[j]);
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RunOperators(values[i] - values[j], values[i] - values[j]);
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}
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}
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}
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BOOST_AUTO_TEST_SUITE_END()
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