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 // REQUIRES: locale.en_US.UTF-8 10 11 // <fstream> 12 13 // int_type overflow(int_type c = traits::eof()); 14 15 // This test is not entirely portable 16 17 #include <fstream> 18 #include <cassert> 19 20 #include "test_macros.h" 21 #include "platform_support.h" // locale name macros 22 23 template <class CharT> 24 struct test_buf 25 : public std::basic_filebuf<CharT> 26 { 27 typedef std::basic_filebuf<CharT> base; 28 typedef typename base::char_type char_type; 29 typedef typename base::int_type int_type; 30 typedef typename base::traits_type traits_type; 31 32 char_type* pbase() const {return base::pbase();} 33 char_type* pptr() const {return base::pptr();} 34 char_type* epptr() const {return base::epptr();} 35 void gbump(int n) {base::gbump(n);} 36 37 virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);} 38 }; 39 40 int main(int, char**) 41 { 42 { 43 test_buf<char> f; 44 assert(f.open("overflow.dat", std::ios_base::out) != 0); 45 assert(f.is_open()); 46 assert(f.pbase() == 0); 47 assert(f.pptr() == 0); 48 assert(f.epptr() == 0); 49 assert(f.overflow('a') == 'a'); 50 assert(f.pbase() != 0); 51 assert(f.pptr() == f.pbase()); 52 assert(f.epptr() - f.pbase() == 4095); 53 } 54 { 55 test_buf<char> f; 56 assert(f.open("overflow.dat", std::ios_base::in) != 0); 57 assert(f.is_open()); 58 assert(f.sgetc() == 'a'); 59 } 60 std::remove("overflow.dat"); 61 { 62 test_buf<char> f; 63 f.pubsetbuf(0, 0); 64 assert(f.open("overflow.dat", std::ios_base::out) != 0); 65 assert(f.is_open()); 66 assert(f.pbase() == 0); 67 assert(f.pptr() == 0); 68 assert(f.epptr() == 0); 69 assert(f.overflow('a') == 'a'); 70 assert(f.pbase() == 0); 71 assert(f.pptr() == 0); 72 assert(f.epptr() == 0); 73 } 74 { 75 test_buf<char> f; 76 assert(f.open("overflow.dat", std::ios_base::in) != 0); 77 assert(f.is_open()); 78 assert(f.sgetc() == 'a'); 79 } 80 std::remove("overflow.dat"); 81 82 #ifndef TEST_HAS_NO_WIDE_CHARACTERS 83 { 84 test_buf<wchar_t> f; 85 assert(f.open("overflow.dat", std::ios_base::out) != 0); 86 assert(f.is_open()); 87 assert(f.pbase() == 0); 88 assert(f.pptr() == 0); 89 assert(f.epptr() == 0); 90 assert(f.overflow(L'a') == L'a'); 91 assert(f.pbase() != 0); 92 assert(f.pptr() == f.pbase()); 93 assert(f.epptr() - f.pbase() == 4095); 94 } 95 { 96 test_buf<wchar_t> f; 97 assert(f.open("overflow.dat", std::ios_base::in) != 0); 98 assert(f.is_open()); 99 assert(f.sgetc() == L'a'); 100 } 101 std::remove("overflow.dat"); 102 { 103 test_buf<wchar_t> f; 104 f.pubsetbuf(0, 0); 105 assert(f.open("overflow.dat", std::ios_base::out) != 0); 106 assert(f.is_open()); 107 assert(f.pbase() == 0); 108 assert(f.pptr() == 0); 109 assert(f.epptr() == 0); 110 assert(f.overflow(L'a') == L'a'); 111 assert(f.pbase() == 0); 112 assert(f.pptr() == 0); 113 assert(f.epptr() == 0); 114 } 115 { 116 test_buf<wchar_t> f; 117 assert(f.open("overflow.dat", std::ios_base::in) != 0); 118 assert(f.is_open()); 119 assert(f.sgetc() == L'a'); 120 } 121 std::remove("overflow.dat"); 122 { 123 test_buf<wchar_t> f; 124 f.pubimbue(std::locale(LOCALE_en_US_UTF_8)); 125 assert(f.open("overflow.dat", std::ios_base::out) != 0); 126 assert(f.sputc(0x4E51) == 0x4E51); 127 assert(f.sputc(0x4E52) == 0x4E52); 128 assert(f.sputc(0x4E53) == 0x4E53); 129 } 130 { 131 test_buf<char> f; 132 assert(f.open("overflow.dat", std::ios_base::in) != 0); 133 assert(f.is_open()); 134 assert(f.sbumpc() == 0xE4); 135 assert(f.sbumpc() == 0xB9); 136 assert(f.sbumpc() == 0x91); 137 assert(f.sbumpc() == 0xE4); 138 assert(f.sbumpc() == 0xB9); 139 assert(f.sbumpc() == 0x92); 140 assert(f.sbumpc() == 0xE4); 141 assert(f.sbumpc() == 0xB9); 142 assert(f.sbumpc() == 0x93); 143 assert(f.sbumpc() == -1); 144 } 145 std::remove("overflow.dat"); 146 #endif // TEST_HAS_NO_WIDE_CHARACTERS 147 148 return 0; 149 } 150