1 //===----------------------------------------------------------------------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // REQUIRES: locale.en_US.UTF-8
44         test_buf<char> f;  in main()  local
45         assert(f.open("underflow.dat", std::ios_base::in) != 0);  in main()
46         assert(f.is_open());  in main()
47         assert(f.eback() == 0);  in main()
48         assert(f.gptr() == 0);  in main()
49         assert(f.egptr() == 0);  in main()
50         assert(f.underflow() == '1');  in main()
51         assert(f.eback() != 0);  in main()
52         assert(f.eback() == f.gptr());  in main()
53         assert(*f.gptr() == '1');  in main()
54         assert(f.egptr() - f.eback() == 9);  in main()
57         test_buf<char> f;  in main()  local
58         assert(f.open("underflow.dat", std::ios_base::in) != 0);  in main()
59         assert(f.pubsetbuf(0, 0));  in main()
60         assert(f.is_open());  in main()
61         assert(f.eback() == 0);  in main()
62         assert(f.gptr() == 0);  in main()
63         assert(f.egptr() == 0);  in main()
64         assert(f.underflow() == '1');  in main()
65         assert(f.eback() != 0);  in main()
66         assert(f.eback() == f.gptr());  in main()
67         assert(*f.gptr() == '1');  in main()
68         assert(f.egptr() - f.eback() == 8);  in main()
69         f.gbump(8);  in main()
70         assert(f.sgetc() == '9');  in main()
71         assert(f.eback()[0] == '5');  in main()
72         assert(f.eback()[1] == '6');  in main()
73         assert(f.eback()[2] == '7');  in main()
74         assert(f.eback()[3] == '8');  in main()
75         assert(f.gptr() - f.eback() == 4);  in main()
76         assert(*f.gptr() == '9');  in main()
77         assert(f.egptr() - f.gptr() == 1);  in main()
81         test_buf<wchar_t> f;  in main()  local
82         assert(f.open("underflow.dat", std::ios_base::in) != 0);  in main()
83         assert(f.is_open());  in main()
84         assert(f.eback() == 0);  in main()
85         assert(f.gptr() == 0);  in main()
86         assert(f.egptr() == 0);  in main()
87         assert(f.underflow() == L'1');  in main()
88         assert(f.eback() != 0);  in main()
89         assert(f.eback() == f.gptr());  in main()
90         assert(*f.gptr() == L'1');  in main()
91         assert(f.egptr() - f.eback() == 9);  in main()
94         test_buf<wchar_t> f;  in main()  local
95         assert(f.pubsetbuf(0, 0));  in main()
96         assert(f.open("underflow.dat", std::ios_base::in) != 0);  in main()
97         assert(f.is_open());  in main()
98         assert(f.eback() == 0);  in main()
99         assert(f.gptr() == 0);  in main()
100         assert(f.egptr() == 0);  in main()
101         assert(f.underflow() == L'1');  in main()
102         assert(f.eback() != 0);  in main()
103         assert(f.eback() == f.gptr());  in main()
104         assert(*f.gptr() == L'1');  in main()
105         assert(f.egptr() - f.eback() == 8);  in main()
106         f.gbump(8);  in main()
107         assert(f.sgetc() == L'9');  in main()
108         assert(f.eback()[0] == L'5');  in main()
109         assert(f.eback()[1] == L'6');  in main()
110         assert(f.eback()[2] == L'7');  in main()
111         assert(f.eback()[3] == L'8');  in main()
112         assert(f.gptr() - f.eback() == 4);  in main()
113         assert(*f.gptr() == L'9');  in main()
114         assert(f.egptr() - f.gptr() == 1);  in main()
118         test_buf<wchar_t> f;  in main()  local
119         f.pubimbue(std::locale(LOCALE_en_US_UTF_8));  in main()
120         assert(f.open("underflow_utf8.dat", std::ios_base::in) != 0);  in main()
121         assert(f.is_open());  in main()
122         assert(f.sbumpc() == 0x4E51);  in main()
123         assert(f.sbumpc() == 0x4E52);  in main()
124         assert(f.sbumpc() == 0x4E53);  in main()
125         assert(f.sbumpc() == static_cast<Traits::int_type>(-1));  in main()