Differential D1219 Diff 3311 src/test/scriptnum_tests.cpp

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src/test/scriptnum_tests.cpp

Show First 20 Lines • Show All 196 Lines • ▼ Show 20 Lines	for (size_t i = 0; i < sizeof(values) / sizeof(values[0]); ++i) {
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]);
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]);
}		}
}		}
}		}

		static void CheckMinimalyEncode(std::vector<uint8_t> data,
		const std::vector<uint8_t> &expected) {
		bool alreadyEncoded = CScriptNum::IsMinimallyEncoded(data, data.size());
		bool hasEncoded = CScriptNum::MinimallyEncode(data);
		BOOST_CHECK_EQUAL(hasEncoded, !alreadyEncoded);
		BOOST_CHECK(data == expected);
		}

		BOOST_AUTO_TEST_CASE(minimize_encoding_test) {
		CheckMinimalyEncode({}, {});

		// Check that positive and negative zeros encode to nothing.
		std::vector<uint8_t> zero, negZero;
		for (size_t i = 0; i < MAX_SCRIPT_ELEMENT_SIZE; i++) {
		zero.push_back(0x00);
		CheckMinimalyEncode(zero, {});

		negZero.push_back(0x80);
		CheckMinimalyEncode(negZero, {});

		// prepare for next round.
		negZero[negZero.size() - 1] = 0x00;
		}

		// Keep one leading zero when sign bit is used.
		std::vector<uint8_t> n{0x80, 0x00}, negn{0x80, 0x80};
		std::vector<uint8_t> npadded = n, negnpadded = negn;
		for (size_t i = 0; i < MAX_SCRIPT_ELEMENT_SIZE; i++) {
		CheckMinimalyEncode(npadded, n);
		npadded.push_back(0x00);

		CheckMinimalyEncode(negnpadded, negn);
		negnpadded[negnpadded.size() - 1] = 0x00;
		negnpadded.push_back(0x80);
		}

		// Mege leading byte when sign bit isn't used.
		std::vector<uint8_t> k{0x7f}, negk{0xff};
		std::vector<uint8_t> kpadded = k, negkpadded = negk;
		for (size_t i = 0; i < MAX_SCRIPT_ELEMENT_SIZE; i++) {
		CheckMinimalyEncode(kpadded, k);
		kpadded.push_back(0x00);

		CheckMinimalyEncode(negkpadded, negk);
		negkpadded[negkpadded.size() - 1] &= 0x7f;
		negkpadded.push_back(0x80);
		}
		}

BOOST_AUTO_TEST_SUITE_END()		BOOST_AUTO_TEST_SUITE_END()