1 /*
2 Copyright 2002, 2003 Daryle Walker
3
4 Copyright 2019 Glen Joseph Fernandes
5 (glenjofe@gmail.com)
6
7 Distributed under the Boost Software License, Version 1.0.
8 (http://www.boost.org/LICENSE_1_0.txt)
9 */
10 #include <boost/io/ios_state.hpp>
11 #include <boost/core/lightweight_test.hpp>
12 #include <boost/config.hpp>
13 #include <iomanip>
14 #include <ios>
15 #include <istream>
16 #include <locale>
17 #include <ostream>
18 #include <sstream>
19 #if defined(BOOST_GCC) || (defined(BOOST_CLANG) && defined(BOOST_GNU_STDLIB))
20 #include <stdexcept>
21 #endif
22 #include <streambuf>
23 #include <string>
24 #include <cstddef>
25
26 class backward_bool_names
27 : public std::numpunct<char> {
28 typedef std::numpunct<char> base_type;
29
30 public:
backward_bool_names(std::size_t refs=0)31 explicit backward_bool_names(std::size_t refs = 0)
32 : base_type( refs ) { }
33
34 protected:
~backward_bool_names()35 ~backward_bool_names() { }
36
do_truename() const37 base_type::string_type do_truename() const {
38 return "eurt";
39 }
40
do_falsename() const41 base_type::string_type do_falsename() const {
42 return "eslaf";
43 }
44 };
45
saver_tests_1(int index,std::istream & input,std::ostream & output,std::ostream & err)46 void saver_tests_1(int index,
47 std::istream& input,
48 std::ostream& output,
49 std::ostream& err)
50 {
51 boost::io::ios_flags_saver ifls(output);
52 boost::io::ios_precision_saver iprs(output);
53 boost::io::ios_width_saver iws(output);
54 boost::io::ios_tie_saver its(input);
55 boost::io::ios_rdbuf_saver irs(output);
56 boost::io::ios_fill_saver ifis(output);
57 boost::io::ios_locale_saver ils(output);
58 boost::io::ios_iword_saver iis(output, index);
59 boost::io::ios_pword_saver ipws(output, index);
60 std::locale loc(std::locale::classic(), new backward_bool_names);
61 input.tie(&err);
62 output.rdbuf(err.rdbuf());
63 output.iword(index) = 69L;
64 output.pword(index) = &err;
65 output.setf(std::ios_base::showpos | std::ios_base::boolalpha);
66 output.setf(std::ios_base::internal, std::ios_base::adjustfield);
67 output.fill('@');
68 output.precision( 9 );
69 output << "Hello world";
70 output << std::setw(10) << -16;
71 output << std::setw(15) << 34.5678901234;
72 output.imbue(loc);
73 output << true;
74 BOOST_TEST(&err == output.pword(index));
75 BOOST_TEST(69L == output.iword(index));
76 try {
77 boost::io::ios_exception_saver ies(output);
78 boost::io::ios_iostate_saver ias(output);
79 output.exceptions(std::ios_base::eofbit | std::ios_base::badbit);
80 output.setstate(std::ios_base::eofbit);
81 BOOST_ERROR("previous line should have thrown");
82 #if defined(BOOST_GCC) || (defined(BOOST_CLANG) && defined(BOOST_GNU_STDLIB))
83 } catch (std::exception&) {
84 #else
85 } catch (std::ios_base::failure&) {
86 #endif
87 BOOST_TEST(output.exceptions() == std::ios_base::goodbit );
88 }
89 }
90
saver_tests_2(int index,std::istream & input,std::ostream & output,std::ostream & err)91 void saver_tests_2(int index,
92 std::istream& input,
93 std::ostream& output,
94 std::ostream& err)
95 {
96 boost::io::ios_tie_saver its(input, &err);
97 boost::io::ios_rdbuf_saver irs(output, err.rdbuf());
98 boost::io::ios_iword_saver iis(output, index, 69L);
99 boost::io::ios_pword_saver ipws(output, index, &err);
100 boost::io::ios_flags_saver ifls(output,
101 (output.flags() & ~std::ios_base::adjustfield) |
102 std::ios_base::showpos |
103 std::ios_base::boolalpha |
104 (std::ios_base::internal & std::ios_base::adjustfield));
105 boost::io::ios_precision_saver iprs(output, 9);
106 boost::io::ios_fill_saver ifis(output, '@');
107 output << "Hello world";
108 boost::io::ios_width_saver iws(output, 12);
109 output << -16 + 34.5678901234;
110 std::locale loc(std::locale::classic(), new backward_bool_names);
111 boost::io::ios_locale_saver ils(output, loc);
112 output << true;
113 BOOST_TEST(&err == output.pword(index));
114 BOOST_TEST(69L == output.iword(index));
115 try {
116 boost::io::ios_exception_saver ies(output, std::ios_base::eofbit);
117 boost::io::ios_iostate_saver ias(output,
118 output.rdstate() | std::ios_base::eofbit );
119 BOOST_ERROR("previous line should have thrown");
120 #if defined(BOOST_GCC) || (defined(BOOST_CLANG) && defined(BOOST_GNU_STDLIB))
121 } catch (std::exception&) {
122 #else
123 } catch (std::ios_base::failure&) {
124 #endif
125 BOOST_TEST(output.exceptions() == std::ios_base::goodbit);
126 }
127 }
128
main()129 int main()
130 {
131 int index = std::ios_base::xalloc();
132 std::ostringstream out;
133 std::ostringstream err;
134 std::istringstream in;
135 std::ios_base::fmtflags out_flags = out.flags();
136 std::streamsize out_precision = out.precision();
137 std::streamsize out_width = out.width();
138 std::ios_base::iostate out_iostate = out.rdstate();
139 std::ios_base::iostate out_exceptions = out.exceptions();
140 std::ostream* in_tie = in.tie();
141 std::streambuf* out_sb = out.rdbuf();
142 char out_fill = out.fill();
143 std::locale out_locale = out.getloc();
144 out.iword(index) = 42L;
145 out.pword(index) = ∈
146 saver_tests_1(index, in, out, err);
147 BOOST_TEST(&in == out.pword(index));
148 BOOST_TEST(42L == out.iword(index));
149 BOOST_TEST(out_locale == out.getloc());
150 BOOST_TEST(out_fill == out.fill());
151 BOOST_TEST(out_sb == out.rdbuf());
152 BOOST_TEST(in_tie == in.tie());
153 BOOST_TEST(out_exceptions == out.exceptions());
154 BOOST_TEST(out_iostate == out.rdstate());
155 BOOST_TEST(out_width == out.width());
156 BOOST_TEST(out_precision == out.precision());
157 BOOST_TEST(out_flags == out.flags());
158 saver_tests_2(index, in, out, err);
159 BOOST_TEST(&in == out.pword(index));
160 BOOST_TEST(42L == out.iword(index));
161 BOOST_TEST(out_locale == out.getloc());
162 BOOST_TEST(out_fill == out.fill());
163 BOOST_TEST(out_sb == out.rdbuf());
164 BOOST_TEST(in_tie == in.tie());
165 BOOST_TEST(out_exceptions == out.exceptions());
166 BOOST_TEST(out_iostate == out.rdstate());
167 BOOST_TEST(out_width == out.width());
168 BOOST_TEST(out_precision == out.precision());
169 BOOST_TEST(out_flags == out.flags());
170 return boost::report_errors();
171 }
172