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 // REQUIRES: locale.en_US.UTF-8
11
12 // <fstream>
13
14 // int_type overflow(int_type c = traits::eof());
15
16 // This test is not entirely portable
17
18 #include <fstream>
19 #include <cassert>
20
21 #include "platform_support.h" // locale name macros
22
23 template <class CharT>
24 struct test_buf
25 : public std::basic_filebuf<CharT>
26 {
27 typedef std::basic_filebuf<CharT> base;
28 typedef typename base::char_type char_type;
29 typedef typename base::int_type int_type;
30 typedef typename base::traits_type traits_type;
31
pbasetest_buf32 char_type* pbase() const {return base::pbase();}
pptrtest_buf33 char_type* pptr() const {return base::pptr();}
epptrtest_buf34 char_type* epptr() const {return base::epptr();}
gbumptest_buf35 void gbump(int n) {base::gbump(n);}
36
overflowtest_buf37 virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);}
38 };
39
main()40 int main()
41 {
42 {
43 test_buf<char> f;
44 assert(f.open("overflow.dat", std::ios_base::out) != 0);
45 assert(f.is_open());
46 assert(f.pbase() == 0);
47 assert(f.pptr() == 0);
48 assert(f.epptr() == 0);
49 assert(f.overflow('a') == 'a');
50 assert(f.pbase() != 0);
51 assert(f.pptr() == f.pbase());
52 assert(f.epptr() - f.pbase() == 4095);
53 }
54 {
55 test_buf<char> f;
56 assert(f.open("overflow.dat", std::ios_base::in) != 0);
57 assert(f.is_open());
58 assert(f.sgetc() == 'a');
59 }
60 std::remove("overflow.dat");
61 {
62 test_buf<char> f;
63 f.pubsetbuf(0, 0);
64 assert(f.open("overflow.dat", std::ios_base::out) != 0);
65 assert(f.is_open());
66 assert(f.pbase() == 0);
67 assert(f.pptr() == 0);
68 assert(f.epptr() == 0);
69 assert(f.overflow('a') == 'a');
70 assert(f.pbase() == 0);
71 assert(f.pptr() == 0);
72 assert(f.epptr() == 0);
73 }
74 {
75 test_buf<char> f;
76 assert(f.open("overflow.dat", std::ios_base::in) != 0);
77 assert(f.is_open());
78 assert(f.sgetc() == 'a');
79 }
80 std::remove("overflow.dat");
81 {
82 test_buf<wchar_t> f;
83 assert(f.open("overflow.dat", std::ios_base::out) != 0);
84 assert(f.is_open());
85 assert(f.pbase() == 0);
86 assert(f.pptr() == 0);
87 assert(f.epptr() == 0);
88 assert(f.overflow(L'a') == L'a');
89 assert(f.pbase() != 0);
90 assert(f.pptr() == f.pbase());
91 assert(f.epptr() - f.pbase() == 4095);
92 }
93 {
94 test_buf<wchar_t> f;
95 assert(f.open("overflow.dat", std::ios_base::in) != 0);
96 assert(f.is_open());
97 assert(f.sgetc() == L'a');
98 }
99 std::remove("overflow.dat");
100 {
101 test_buf<wchar_t> f;
102 f.pubsetbuf(0, 0);
103 assert(f.open("overflow.dat", std::ios_base::out) != 0);
104 assert(f.is_open());
105 assert(f.pbase() == 0);
106 assert(f.pptr() == 0);
107 assert(f.epptr() == 0);
108 assert(f.overflow(L'a') == L'a');
109 assert(f.pbase() == 0);
110 assert(f.pptr() == 0);
111 assert(f.epptr() == 0);
112 }
113 {
114 test_buf<wchar_t> f;
115 assert(f.open("overflow.dat", std::ios_base::in) != 0);
116 assert(f.is_open());
117 assert(f.sgetc() == L'a');
118 }
119 std::remove("overflow.dat");
120 {
121 test_buf<wchar_t> f;
122 f.pubimbue(std::locale(LOCALE_en_US_UTF_8));
123 assert(f.open("overflow.dat", std::ios_base::out) != 0);
124 assert(f.sputc(0x4E51) == 0x4E51);
125 assert(f.sputc(0x4E52) == 0x4E52);
126 assert(f.sputc(0x4E53) == 0x4E53);
127 }
128 {
129 test_buf<char> f;
130 assert(f.open("overflow.dat", std::ios_base::in) != 0);
131 assert(f.is_open());
132 assert(f.sbumpc() == 0xE4);
133 assert(f.sbumpc() == 0xB9);
134 assert(f.sbumpc() == 0x91);
135 assert(f.sbumpc() == 0xE4);
136 assert(f.sbumpc() == 0xB9);
137 assert(f.sbumpc() == 0x92);
138 assert(f.sbumpc() == 0xE4);
139 assert(f.sbumpc() == 0xB9);
140 assert(f.sbumpc() == 0x93);
141 assert(f.sbumpc() == -1);
142 }
143 std::remove("overflow.dat");
144 }
145