71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gtest/gtest.h>
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#include <stdint.h>
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#include <limits>
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#include <sstream>
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// TODO: move this test to libcxx.
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template <typename T>
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static void CheckOverflow(T expected, const char* value, bool should_overflow) {
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std::stringstream ss(value);
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T result = T(0);
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ss >> result;
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EXPECT_FALSE(ss.bad()) << value << ' ' << int64_t(result);
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EXPECT_EQ(should_overflow, ss.fail()) << value << ' ' << int64_t(result);
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if (!should_overflow) { // glibc writes garbage on overflow.
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ASSERT_EQ(expected, result) << value;
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}
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}
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TEST(sstream, __get_integer_overflow_8) {
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// The usual byte/char confusion means that operator>> on 8-bit types is used
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// for chars, so there's no possibility of overflow.
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}
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TEST(sstream, __get_integer_overflow_16) {
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CheckOverflow<int16_t>(std::numeric_limits<int16_t>::min(), "-32768", false);
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CheckOverflow<int16_t>(0, "-32769", true);
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CheckOverflow<int16_t>(std::numeric_limits<int16_t>::max(), "32767", false);
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CheckOverflow<int16_t>(0, "32768", true);
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CheckOverflow<uint16_t>(std::numeric_limits<uint16_t>::max(), "65535", false);
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CheckOverflow<uint16_t>(0, "65536", true);
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}
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TEST(sstream, __get_integer_overflow_32) {
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CheckOverflow<int32_t>(std::numeric_limits<int32_t>::min(), "-2147483648", false);
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CheckOverflow<int32_t>(0, "-2147483649", true);
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CheckOverflow<int32_t>(std::numeric_limits<int32_t>::max(), "2147483647", false);
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CheckOverflow<int32_t>(0, "2147483648", true);
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CheckOverflow<uint32_t>(std::numeric_limits<uint32_t>::max(), "4294967295", false);
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CheckOverflow<uint32_t>(0, "4294967296", true);
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}
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TEST(sstream, __get_integer_overflow_64) {
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CheckOverflow<int64_t>(std::numeric_limits<int64_t>::min(), "-9223372036854775808", false);
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CheckOverflow<int64_t>(0, "-9223372036854775809", true);
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CheckOverflow<int64_t>(std::numeric_limits<int64_t>::max(), "9223372036854775807", false);
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CheckOverflow<int64_t>(0, "9223372036854775808", true);
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CheckOverflow<uint64_t>(std::numeric_limits<uint64_t>::max(), "18446744073709551615", false);
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CheckOverflow<uint64_t>(0, "18446744073709551616", true);
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}
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