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