18c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes/* 28c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * Copyright (C) 2014 The Android Open Source Project 38c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * 48c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 58c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * you may not use this file except in compliance with the License. 68c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * You may obtain a copy of the License at 78c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * 88c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 98c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * 108c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * Unless required by applicable law or agreed to in writing, software 118c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 128c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 138c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * See the License for the specific language governing permissions and 148c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes * limitations under the License. 158c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes */ 168c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes 178c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes#include <gtest/gtest.h> 188c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes 196455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes#include <stdint.h> 206455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes#include <limits> 218c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes#include <sstream> 228c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes 238c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes// TODO: move this test to libcxx. 248c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes 256455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughestemplate <typename T> 266455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughesstatic void CheckOverflow(T expected, const char* value, bool should_overflow) { 276455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes std::stringstream ss(value); 286455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes T result = T(0); 298c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes ss >> result; 306455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes EXPECT_FALSE(ss.bad()) << value << ' ' << int64_t(result); 316455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes EXPECT_EQ(should_overflow, ss.fail()) << value << ' ' << int64_t(result); 326455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes if (!should_overflow) { // glibc writes garbage on overflow. 336455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes ASSERT_EQ(expected, result) << value; 346455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes } 356455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes} 366455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 376455ac73da3f8b4ff6aae2acb0442429c8921788Elliott HughesTEST(sstream, __get_integer_overflow_8) { 386455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes // The usual byte/char confusion means that operator>> on 8-bit types is used 396455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes // for chars, so there's no possibility of overflow. 406455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes} 416455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 426455ac73da3f8b4ff6aae2acb0442429c8921788Elliott HughesTEST(sstream, __get_integer_overflow_16) { 436455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int16_t>(std::numeric_limits<int16_t>::min(), "-32768", false); 446455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int16_t>(0, "-32769", true); 456455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int16_t>(std::numeric_limits<int16_t>::max(), "32767", false); 466455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int16_t>(0, "32768", true); 476455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 486455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<uint16_t>(std::numeric_limits<uint16_t>::max(), "65535", false); 496455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<uint16_t>(0, "65536", true); 506455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes} 516455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 526455ac73da3f8b4ff6aae2acb0442429c8921788Elliott HughesTEST(sstream, __get_integer_overflow_32) { 536455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int32_t>(std::numeric_limits<int32_t>::min(), "-2147483648", false); 546455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int32_t>(0, "-2147483649", true); 556455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int32_t>(std::numeric_limits<int32_t>::max(), "2147483647", false); 566455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int32_t>(0, "2147483648", true); 576455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 586455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<uint32_t>(std::numeric_limits<uint32_t>::max(), "4294967295", false); 596455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<uint32_t>(0, "4294967296", true); 606455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes} 616455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 626455ac73da3f8b4ff6aae2acb0442429c8921788Elliott HughesTEST(sstream, __get_integer_overflow_64) { 636455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int64_t>(std::numeric_limits<int64_t>::min(), "-9223372036854775808", false); 646455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int64_t>(0, "-9223372036854775809", true); 656455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int64_t>(std::numeric_limits<int64_t>::max(), "9223372036854775807", false); 666455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<int64_t>(0, "9223372036854775808", true); 676455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes 686455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<uint64_t>(std::numeric_limits<uint64_t>::max(), "18446744073709551615", false); 696455ac73da3f8b4ff6aae2acb0442429c8921788Elliott Hughes CheckOverflow<uint64_t>(0, "18446744073709551616", true); 708c42606ae10b59318c9a4ea83854049bab5b9328Elliott Hughes} 71