1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <gtest/gtest.h> 18 19 #include <stdint.h> 20 #include <limits> 21 #include <sstream> 22 23 // TODO: move this test to libcxx. 24 25 template <typename T> 26 static void CheckOverflow(T expected, const char* value, bool should_overflow) { 27 std::stringstream ss(value); 28 T result = T(0); 29 ss >> result; 30 EXPECT_FALSE(ss.bad()) << value << ' ' << int64_t(result); 31 EXPECT_EQ(should_overflow, ss.fail()) << value << ' ' << int64_t(result); 32 if (!should_overflow) { // glibc writes garbage on overflow. 33 ASSERT_EQ(expected, result) << value; 34 } 35 } 36 37 TEST(sstream, __get_integer_overflow_8) { 38 // The usual byte/char confusion means that operator>> on 8-bit types is used 39 // for chars, so there's no possibility of overflow. 40 } 41 42 TEST(sstream, __get_integer_overflow_16) { 43 CheckOverflow<int16_t>(std::numeric_limits<int16_t>::min(), "-32768", false); 44 CheckOverflow<int16_t>(0, "-32769", true); 45 CheckOverflow<int16_t>(std::numeric_limits<int16_t>::max(), "32767", false); 46 CheckOverflow<int16_t>(0, "32768", true); 47 48 CheckOverflow<uint16_t>(std::numeric_limits<uint16_t>::max(), "65535", false); 49 CheckOverflow<uint16_t>(0, "65536", true); 50 } 51 52 TEST(sstream, __get_integer_overflow_32) { 53 CheckOverflow<int32_t>(std::numeric_limits<int32_t>::min(), "-2147483648", false); 54 CheckOverflow<int32_t>(0, "-2147483649", true); 55 CheckOverflow<int32_t>(std::numeric_limits<int32_t>::max(), "2147483647", false); 56 CheckOverflow<int32_t>(0, "2147483648", true); 57 58 CheckOverflow<uint32_t>(std::numeric_limits<uint32_t>::max(), "4294967295", false); 59 CheckOverflow<uint32_t>(0, "4294967296", true); 60 } 61 62 TEST(sstream, __get_integer_overflow_64) { 63 CheckOverflow<int64_t>(std::numeric_limits<int64_t>::min(), "-9223372036854775808", false); 64 CheckOverflow<int64_t>(0, "-9223372036854775809", true); 65 CheckOverflow<int64_t>(std::numeric_limits<int64_t>::max(), "9223372036854775807", false); 66 CheckOverflow<int64_t>(0, "9223372036854775808", true); 67 68 CheckOverflow<uint64_t>(std::numeric_limits<uint64_t>::max(), "18446744073709551615", false); 69 CheckOverflow<uint64_t>(0, "18446744073709551616", true); 70 } 71
