1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <fstream> 10 11 // template <class charT, class traits = char_traits<charT> > 12 // class basic_fstream 13 14 // explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in | ios_base::out); 15 16 // XFAIL: LIBCXX-AIX-FIXME 17 18 #include <fstream> 19 #include <cassert> 20 #include "test_macros.h" 21 #include "platform_support.h" 22 23 int main(int, char**) 24 { 25 std::string temp = get_temp_file_name(); 26 { 27 std::fstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out 28 | std::ios_base::trunc); 29 double x = 0; 30 fs << 3.25; 31 fs.seekg(0); 32 fs >> x; 33 assert(x == 3.25); 34 } 35 std::remove(temp.c_str()); 36 37 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 38 { 39 std::wfstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out 40 | std::ios_base::trunc); 41 double x = 0; 42 fs << 3.25; 43 fs.seekg(0); 44 fs >> x; 45 assert(x == 3.25); 46 } 47 std::remove(temp.c_str()); 48 #endif 49 50 #if TEST_STD_VER >= 23 51 // Test all the noreplace flag combinations 52 { 53 std::ios_base::openmode modes[] = { 54 std::ios_base::out | std::ios_base::noreplace, 55 std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace, 56 std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace, 57 std::ios_base::out | std::ios_base::noreplace | std::ios_base::binary, 58 std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace | std::ios_base::binary, 59 std::ios_base::in | std::ios_base::out | std::ios_base::trunc | std::ios_base::noreplace | 60 std::ios_base::binary, 61 }; 62 for (auto mode : modes) { 63 std::string tmp = get_temp_file_name(); // also creates the file 64 65 { 66 std::fstream f(tmp.c_str(), mode); 67 assert(!f.is_open()); // since it already exists 68 } 69 70 { 71 std::remove(tmp.c_str()); 72 73 std::fstream f(tmp.c_str(), mode); 74 assert(f.is_open()); // since it doesn't exist 75 } 76 } 77 78 # ifndef TEST_HAS_NO_WIDE_CHARACTERS 79 for (auto mode : modes) { 80 std::string tmp = get_temp_file_name(); // also creates the file 81 82 { 83 std::wfstream f(tmp.c_str(), mode); 84 assert(!f.is_open()); // since it already exists 85 } 86 87 { 88 std::remove(tmp.c_str()); 89 90 std::wfstream f(tmp.c_str(), mode); 91 assert(f.is_open()); // since it doesn't exist 92 } 93 } 94 # endif 95 } 96 #endif // TEST_STD_VER >= 23 97 98 return 0; 99 } 100