[29] | 1 | // Boost ios_state_test.cpp test file --------------------------------------// |
---|
| 2 | |
---|
| 3 | // Copyright 2002, 2003 Daryle Walker. Use, modification, and distribution are |
---|
| 4 | // subject to the Boost Software License, Version 1.0. (See accompanying file |
---|
| 5 | // LICENSE_1_0.txt or a copy at <http://www.boost.org/LICENSE_1_0.txt>.) |
---|
| 6 | |
---|
| 7 | // See <http://www.boost.org/libs/io/> for the library's home page. |
---|
| 8 | |
---|
| 9 | // Revision History |
---|
| 10 | // 15 Jun 2003 Adjust to changes in Boost.Test (Daryle Walker) |
---|
| 11 | // 26 Feb 2002 Initial version (Daryle Walker) |
---|
| 12 | |
---|
| 13 | #include <boost/test/minimal.hpp> // main, BOOST_CHECK, etc. |
---|
| 14 | |
---|
| 15 | #include <boost/cstdlib.hpp> // for boost::exit_success |
---|
| 16 | #include <boost/io/ios_state.hpp> // for boost::io::ios_flags_saver, etc. |
---|
| 17 | |
---|
| 18 | #include <cstddef> // for std::size_t |
---|
| 19 | #include <iomanip> // for std::setw |
---|
| 20 | #include <ios> // for std::ios_base, std::streamsize, etc. |
---|
| 21 | #include <iostream> // for std::cout, etc. |
---|
| 22 | #include <istream> // for std::istream |
---|
| 23 | #include <locale> // for std::numpunct, std::locale |
---|
| 24 | #include <ostream> // for std::endl, std::ostream |
---|
| 25 | #include <streambuf> // for std::streambuf |
---|
| 26 | #include <string> // for std::string |
---|
| 27 | |
---|
| 28 | |
---|
| 29 | // Facet with the bool names spelled backwards |
---|
| 30 | class backward_bool_names |
---|
| 31 | : public std::numpunct<char> |
---|
| 32 | { |
---|
| 33 | typedef std::numpunct<char> base_type; |
---|
| 34 | |
---|
| 35 | public: |
---|
| 36 | explicit backward_bool_names( std::size_t refs = 0 ) |
---|
| 37 | : base_type( refs ) |
---|
| 38 | {} |
---|
| 39 | |
---|
| 40 | protected: |
---|
| 41 | virtual ~backward_bool_names() {} |
---|
| 42 | |
---|
| 43 | virtual base_type::string_type do_truename() const |
---|
| 44 | { return "eurt"; } |
---|
| 45 | virtual base_type::string_type do_falsename() const |
---|
| 46 | { return "eslaf"; } |
---|
| 47 | }; |
---|
| 48 | |
---|
| 49 | |
---|
| 50 | // Index to test custom storage |
---|
| 51 | int const my_index = std::ios_base::xalloc(); |
---|
| 52 | |
---|
| 53 | // Test data |
---|
| 54 | char const test_string[] = "Hello world"; |
---|
| 55 | int const test_num1 = -16; |
---|
| 56 | double const test_num2 = 34.5678901234; |
---|
| 57 | bool const test_bool = true; |
---|
| 58 | |
---|
| 59 | |
---|
| 60 | // Function prototypes |
---|
| 61 | void saver_tests_1( std::istream &input, std::ostream &output, |
---|
| 62 | std::ostream &err ); |
---|
| 63 | void saver_tests_2( std::istream &input, std::ostream &output, |
---|
| 64 | std::ostream &err ); |
---|
| 65 | |
---|
| 66 | |
---|
| 67 | // Test program |
---|
| 68 | int |
---|
| 69 | test_main |
---|
| 70 | ( |
---|
| 71 | int , // "argc" is unused |
---|
| 72 | char * [] // "argv" is unused |
---|
| 73 | ) |
---|
| 74 | { |
---|
| 75 | using std::cout; |
---|
| 76 | using std::ios_base; |
---|
| 77 | using std::streamsize; |
---|
| 78 | using std::cin; |
---|
| 79 | |
---|
| 80 | cout << "The original data is:\n"; |
---|
| 81 | cout << '\t' << test_string << '\n'; |
---|
| 82 | cout << '\t' << test_num1 << '\n'; |
---|
| 83 | cout << '\t' << test_num2 << '\n'; |
---|
| 84 | cout << '\t' << std::boolalpha << test_bool << std::endl; |
---|
| 85 | |
---|
| 86 | // Save states for comparison later |
---|
| 87 | ios_base::fmtflags const cout_flags = cout.flags(); |
---|
| 88 | streamsize const cout_precision = cout.precision(); |
---|
| 89 | streamsize const cout_width = cout.width(); |
---|
| 90 | ios_base::iostate const cout_iostate = cout.rdstate(); |
---|
| 91 | ios_base::iostate const cout_exceptions = cout.exceptions(); |
---|
| 92 | std::ostream * const cin_tie = cin.tie(); |
---|
| 93 | std::streambuf * const cout_sb = cout.rdbuf(); |
---|
| 94 | char const cout_fill = cout.fill(); |
---|
| 95 | std::locale const cout_locale = cout.getloc(); |
---|
| 96 | |
---|
| 97 | cout.iword( my_index ) = 42L; |
---|
| 98 | cout.pword( my_index ) = &cin; |
---|
| 99 | |
---|
| 100 | // Run saver tests with changing separate from saving |
---|
| 101 | saver_tests_1( cin, cout, std::cerr ); |
---|
| 102 | |
---|
| 103 | // Check if states are back to normal |
---|
| 104 | BOOST_CHECK( &cin == cout.pword(my_index) ); |
---|
| 105 | BOOST_CHECK( 42L == cout.iword(my_index) ); |
---|
| 106 | BOOST_CHECK( cout_locale == cout.getloc() ); |
---|
| 107 | BOOST_CHECK( cout_fill == cout.fill() ); |
---|
| 108 | BOOST_CHECK( cout_sb == cout.rdbuf() ); |
---|
| 109 | BOOST_CHECK( cin_tie == cin.tie() ); |
---|
| 110 | BOOST_CHECK( cout_exceptions == cout.exceptions() ); |
---|
| 111 | BOOST_CHECK( cout_iostate == cout.rdstate() ); |
---|
| 112 | BOOST_CHECK( cout_width == cout.width() ); |
---|
| 113 | BOOST_CHECK( cout_precision == cout.precision() ); |
---|
| 114 | BOOST_CHECK( cout_flags == cout.flags() ); |
---|
| 115 | |
---|
| 116 | // Run saver tests with combined saving and changing |
---|
| 117 | saver_tests_2( cin, cout, std::cerr ); |
---|
| 118 | |
---|
| 119 | // Check if states are back to normal |
---|
| 120 | BOOST_CHECK( &cin == cout.pword(my_index) ); |
---|
| 121 | BOOST_CHECK( 42L == cout.iword(my_index) ); |
---|
| 122 | BOOST_CHECK( cout_locale == cout.getloc() ); |
---|
| 123 | BOOST_CHECK( cout_fill == cout.fill() ); |
---|
| 124 | BOOST_CHECK( cout_sb == cout.rdbuf() ); |
---|
| 125 | BOOST_CHECK( cin_tie == cin.tie() ); |
---|
| 126 | BOOST_CHECK( cout_exceptions == cout.exceptions() ); |
---|
| 127 | BOOST_CHECK( cout_iostate == cout.rdstate() ); |
---|
| 128 | BOOST_CHECK( cout_width == cout.width() ); |
---|
| 129 | BOOST_CHECK( cout_precision == cout.precision() ); |
---|
| 130 | BOOST_CHECK( cout_flags == cout.flags() ); |
---|
| 131 | |
---|
| 132 | return boost::exit_success; |
---|
| 133 | } |
---|
| 134 | |
---|
| 135 | // Save, change, and restore stream properties |
---|
| 136 | void |
---|
| 137 | saver_tests_1 |
---|
| 138 | ( |
---|
| 139 | std::istream & input, |
---|
| 140 | std::ostream & output, |
---|
| 141 | std::ostream & err |
---|
| 142 | ) |
---|
| 143 | { |
---|
| 144 | using std::locale; |
---|
| 145 | using std::ios_base; |
---|
| 146 | using std::setw; |
---|
| 147 | |
---|
| 148 | boost::io::ios_flags_saver const ifls( output ); |
---|
| 149 | boost::io::ios_precision_saver const iprs( output ); |
---|
| 150 | boost::io::ios_width_saver const iws( output ); |
---|
| 151 | boost::io::ios_tie_saver const its( input ); |
---|
| 152 | boost::io::ios_rdbuf_saver const irs( output ); |
---|
| 153 | boost::io::ios_fill_saver const ifis( output ); |
---|
| 154 | boost::io::ios_locale_saver const ils( output ); |
---|
| 155 | boost::io::ios_iword_saver const iis( output, my_index ); |
---|
| 156 | boost::io::ios_pword_saver const ipws( output, my_index ); |
---|
| 157 | |
---|
| 158 | locale loc( locale::classic(), new backward_bool_names ); |
---|
| 159 | |
---|
| 160 | input.tie( &err ); |
---|
| 161 | output.rdbuf( err.rdbuf() ); |
---|
| 162 | output.iword( my_index ) = 69L; |
---|
| 163 | output.pword( my_index ) = &err; |
---|
| 164 | |
---|
| 165 | output << "The data is (again):\n"; |
---|
| 166 | output.setf( ios_base::showpos | ios_base::boolalpha ); |
---|
| 167 | output.setf( ios_base::internal, ios_base::adjustfield ); |
---|
| 168 | output.fill( '@' ); |
---|
| 169 | output.precision( 9 ); |
---|
| 170 | output << '\t' << test_string << '\n'; |
---|
| 171 | output << '\t' << setw( 10 ) << test_num1 << '\n'; |
---|
| 172 | output << '\t' << setw( 15 ) << test_num2 << '\n'; |
---|
| 173 | output.imbue( loc ); |
---|
| 174 | output << '\t' << test_bool << '\n'; |
---|
| 175 | |
---|
| 176 | BOOST_CHECK( &err == output.pword(my_index) ); |
---|
| 177 | BOOST_CHECK( 69L == output.iword(my_index) ); |
---|
| 178 | |
---|
| 179 | try |
---|
| 180 | { |
---|
| 181 | boost::io::ios_exception_saver const ies( output ); |
---|
| 182 | boost::io::ios_iostate_saver const iis( output ); |
---|
| 183 | |
---|
| 184 | output.exceptions( ios_base::eofbit ); |
---|
| 185 | output.setstate( ios_base::eofbit ); |
---|
| 186 | BOOST_ERROR( "previous line should have thrown" ); |
---|
| 187 | } |
---|
| 188 | catch ( ios_base::failure &f ) |
---|
| 189 | { |
---|
| 190 | err << "Got the expected I/O failure: \"" << f.what() << "\".\n"; |
---|
| 191 | BOOST_CHECK( output.exceptions() == ios_base::goodbit ); |
---|
| 192 | } |
---|
| 193 | catch ( ... ) |
---|
| 194 | { |
---|
| 195 | err << "Got an unknown error when doing exception test!\n"; |
---|
| 196 | throw; |
---|
| 197 | } |
---|
| 198 | } |
---|
| 199 | |
---|
| 200 | // Save & change and restore stream properties |
---|
| 201 | void |
---|
| 202 | saver_tests_2 |
---|
| 203 | ( |
---|
| 204 | std::istream & input, |
---|
| 205 | std::ostream & output, |
---|
| 206 | std::ostream & err |
---|
| 207 | ) |
---|
| 208 | { |
---|
| 209 | using std::locale; |
---|
| 210 | using std::ios_base; |
---|
| 211 | |
---|
| 212 | boost::io::ios_tie_saver const its( input, &err ); |
---|
| 213 | boost::io::ios_rdbuf_saver const irs( output, err.rdbuf() ); |
---|
| 214 | boost::io::ios_iword_saver const iis( output, my_index, 69L ); |
---|
| 215 | boost::io::ios_pword_saver const ipws( output, my_index, &err ); |
---|
| 216 | output << "The data is (a third time; adding the numbers):\n"; |
---|
| 217 | |
---|
| 218 | boost::io::ios_flags_saver const ifls( output, (output.flags() |
---|
| 219 | & ~ios_base::adjustfield) | ios_base::showpos | ios_base::boolalpha |
---|
| 220 | | (ios_base::internal & ios_base::adjustfield) ); |
---|
| 221 | boost::io::ios_precision_saver const iprs( output, 9 ); |
---|
| 222 | boost::io::ios_fill_saver const ifis( output, '@' ); |
---|
| 223 | output << '\t' << test_string << '\n'; |
---|
| 224 | |
---|
| 225 | boost::io::ios_width_saver const iws( output, 12 ); |
---|
| 226 | output.put( '\t' ); |
---|
| 227 | output << test_num1 + test_num2; |
---|
| 228 | output.put( '\n' ); |
---|
| 229 | |
---|
| 230 | locale loc( locale::classic(), |
---|
| 231 | new backward_bool_names ); |
---|
| 232 | boost::io::ios_locale_saver const ils( output, loc ); |
---|
| 233 | output << '\t' << test_bool << '\n'; |
---|
| 234 | |
---|
| 235 | BOOST_CHECK( &err == output.pword(my_index) ); |
---|
| 236 | BOOST_CHECK( 69L == output.iword(my_index) ); |
---|
| 237 | |
---|
| 238 | try |
---|
| 239 | { |
---|
| 240 | boost::io::ios_exception_saver const ies( output, ios_base::eofbit ); |
---|
| 241 | boost::io::ios_iostate_saver const iis( output, output.rdstate() |
---|
| 242 | | ios_base::eofbit ); |
---|
| 243 | |
---|
| 244 | BOOST_ERROR( "previous line should have thrown" ); |
---|
| 245 | } |
---|
| 246 | catch ( ios_base::failure &f ) |
---|
| 247 | { |
---|
| 248 | err << "Got the expected I/O failure: \"" << f.what() << "\".\n"; |
---|
| 249 | BOOST_CHECK( output.exceptions() == ios_base::goodbit ); |
---|
| 250 | } |
---|
| 251 | catch ( ... ) |
---|
| 252 | { |
---|
| 253 | err << "Got an unknown error when doing exception test!\n"; |
---|
| 254 | throw; |
---|
| 255 | } |
---|
| 256 | } |
---|