1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // REQUIRES: locale.en_US.UTF-8 11 12 // <fstream> 13 14 // int_type overflow(int_type c = traits::eof()); 15 16 // This test is not entirely portable 17 18 #include <fstream> 19 #include <cassert> 20 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() 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 test_buf<wchar_t> f; 83 assert(f.open("overflow.dat", std::ios_base::out) != 0); 84 assert(f.is_open()); 85 assert(f.pbase() == 0); 86 assert(f.pptr() == 0); 87 assert(f.epptr() == 0); 88 assert(f.overflow(L'a') == L'a'); 89 assert(f.pbase() != 0); 90 assert(f.pptr() == f.pbase()); 91 assert(f.epptr() - f.pbase() == 4095); 92 } 93 { 94 test_buf<wchar_t> f; 95 assert(f.open("overflow.dat", std::ios_base::in) != 0); 96 assert(f.is_open()); 97 assert(f.sgetc() == L'a'); 98 } 99 std::remove("overflow.dat"); 100 { 101 test_buf<wchar_t> f; 102 f.pubsetbuf(0, 0); 103 assert(f.open("overflow.dat", std::ios_base::out) != 0); 104 assert(f.is_open()); 105 assert(f.pbase() == 0); 106 assert(f.pptr() == 0); 107 assert(f.epptr() == 0); 108 assert(f.overflow(L'a') == L'a'); 109 assert(f.pbase() == 0); 110 assert(f.pptr() == 0); 111 assert(f.epptr() == 0); 112 } 113 { 114 test_buf<wchar_t> f; 115 assert(f.open("overflow.dat", std::ios_base::in) != 0); 116 assert(f.is_open()); 117 assert(f.sgetc() == L'a'); 118 } 119 std::remove("overflow.dat"); 120 { 121 test_buf<wchar_t> f; 122 f.pubimbue(std::locale(LOCALE_en_US_UTF_8)); 123 assert(f.open("overflow.dat", std::ios_base::out) != 0); 124 assert(f.sputc(0x4E51) == 0x4E51); 125 assert(f.sputc(0x4E52) == 0x4E52); 126 assert(f.sputc(0x4E53) == 0x4E53); 127 } 128 { 129 test_buf<char> f; 130 assert(f.open("overflow.dat", std::ios_base::in) != 0); 131 assert(f.is_open()); 132 assert(f.sbumpc() == 0xE4); 133 assert(f.sbumpc() == 0xB9); 134 assert(f.sbumpc() == 0x91); 135 assert(f.sbumpc() == 0xE4); 136 assert(f.sbumpc() == 0xB9); 137 assert(f.sbumpc() == 0x92); 138 assert(f.sbumpc() == 0xE4); 139 assert(f.sbumpc() == 0xB9); 140 assert(f.sbumpc() == 0x93); 141 assert(f.sbumpc() == -1); 142 } 143 std::remove("overflow.dat"); 144 } 145
