1 // 2001-05-23 Benjamin Kosnik <bkoz@redhat.com> 2 3 // Copyright (C) 2001, 2002 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 2, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING. If not, write to the Free 18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 19 // USA. 20 21 // 27.7.3.2 member functions (ostringstream_members) 22 23 #include <sstream> 24 #include <testsuite_hooks.h> 25 26 void test01() 27 { 28 bool test = true; 29 std::ostringstream os01; 30 const std::string str00; 31 const std::string str01 = "123"; 32 std::string str02; 33 const int i01 = 123; 34 int a,b; 35 36 std::ios_base::iostate state1, state2, statefail, stateeof; 37 statefail = std::ios_base::failbit; 38 stateeof = std::ios_base::eofbit; 39 40 // string str() const 41 str02 = os01.str(); 42 VERIFY( str00 == str02 ); 43 44 // void str(const basic_string&) 45 os01.str(str01); 46 str02 = os01.str(); 47 VERIFY( str01 == str02 ); 48 49 #ifdef DEBUG_ASSERT 50 assert(test); 51 #endif 52 } 53 54 void 55 redirect_buffer(std::ios& stream, std::streambuf* new_buf) 56 { stream.rdbuf(new_buf); } 57 58 std::streambuf* 59 active_buffer(std::ios& stream) 60 { return stream.rdbuf(); } 61 62 // libstdc++/2832 63 void test02() 64 { 65 bool test = true; 66 const char* strlit01 = "fuck war"; 67 const char* strlit02 = "two less cars abstract riot crew, critical mass/SF"; 68 const std::string str00; 69 const std::string str01(strlit01); 70 std::string str02; 71 std::stringbuf sbuf(str01); 72 std::streambuf* pbasebuf0 = &sbuf; 73 74 std::ostringstream sstrm1; 75 VERIFY( sstrm1.str() == str00 ); 76 // derived rdbuf() always returns original streambuf, even though 77 // it's no longer associated with the stream. 78 std::stringbuf* const buf1 = sstrm1.rdbuf(); 79 // base rdbuf() returns the currently associated streambuf 80 std::streambuf* pbasebuf1 = active_buffer(sstrm1); 81 redirect_buffer(sstrm1, &sbuf); 82 std::stringbuf* const buf2 = sstrm1.rdbuf(); 83 std::streambuf* pbasebuf2 = active_buffer(sstrm1); 84 VERIFY( buf1 == buf2 ); 85 VERIFY( pbasebuf1 != pbasebuf2 ); 86 VERIFY( pbasebuf2 == pbasebuf0 ); 87 88 // derived rdbuf() returns the original buf, so str() doesn't change. 89 VERIFY( sstrm1.str() != str01 ); 90 VERIFY( sstrm1.str() == str00 ); 91 // however, casting the active streambuf to a stringbuf shows what's up: 92 std::stringbuf* psbuf = dynamic_cast<std::stringbuf*>(pbasebuf2); 93 str02 = psbuf->str(); 94 VERIFY( str02 == str01 ); 95 96 // How confusing and non-intuitive is this? 97 // These semantics are a joke, a serious defect, and incredibly lame. 98 } 99 100 // 03: sanity checks for strings, stringbufs 101 void 102 test03() 103 { 104 bool test = false; 105 106 // Empty string sanity check. 107 std::string str01; 108 std::string::iterator __i_start = str01.begin(); 109 std::string::iterator __i_end = str01.end(); 110 std::string::size_type len = str01.size(); 111 test = __i_start == __i_end; 112 VERIFY( len == 0 ); 113 114 // Full string sanity check. 115 std::string str02("these golden days, i spend waiting for you:\n" 116 "Betty Carter on Verve with I'm Yours and You're Mine."); 117 __i_start = str02.begin(); 118 __i_end = str02.end(); 119 len = str02.size(); 120 VERIFY( __i_start != __i_end ); 121 VERIFY( len != 0 ); 122 123 // Test an empty ostringstream for sanity. 124 std::ostringstream ostrstream0; 125 std::string str03 = ostrstream0.str(); 126 __i_start = str03.begin(); 127 __i_end = str03.end(); 128 len = str03.size(); 129 VERIFY( __i_start == __i_end ); 130 VERIFY( len == 0 ); 131 VERIFY( str01 == str03 ); 132 } 133 134 // user-reported error 135 class derived_oss: public std::ostringstream 136 { 137 public: 138 derived_oss() : std::ostringstream() { } 139 }; 140 141 void 142 test04() 143 { 144 bool test = true; 145 derived_oss yy; 146 yy << "buena vista social club\n"; 147 VERIFY( yy.str() == std::string("buena vista social club\n") ); 148 } 149 150 int main() 151 { 152 test01(); 153 test02(); 154 test03(); 155 test04(); 156 return 0; 157 } 158