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gerrit-public.fairphone.software / toolchain / llvm-project / 0547ad38e334146599521e455d0d6f83a117a60e / . / libcxx / test / input.output / file.streams / fstreams / filebuf.virtuals / overflow.pass.cpp
blob: c01942ba94e70c2f8a70e53ec00a83b062f6a56c [file] [log] [blame]
Howard Hinnant3e519522010-05-11 19:42:16 +0000[diff] [blame]1//===----------------------------------------------------------------------===//
2//
3// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <fstream>
11
12// int_type overflow(int_type c = traits::eof());
13
14// This test is not entirely portable
15
16#include <fstream>
17#include <cassert>
18
19template <class CharT>
20struct test_buf
21 : public std::basic_filebuf<CharT>
22{
23 typedef std::basic_filebuf<CharT> base;
24 typedef typename base::char_type char_type;
25 typedef typename base::int_type int_type;
26 typedef typename base::traits_type traits_type;
27
28 char_type* pbase() const {return base::pbase();}
29 char_type* pptr() const {return base::pptr();}
30 char_type* epptr() const {return base::epptr();}
31 void gbump(int n) {base::gbump(n);}
32
33 virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);}
34};
35
36int main()
37{
38 {
39 test_buf<char> f;
40 assert(f.open("overflow.dat", std::ios_base::out) != 0);
41 assert(f.is_open());
42 assert(f.pbase() == 0);
43 assert(f.pptr() == 0);
44 assert(f.epptr() == 0);
45 assert(f.overflow('a') == 'a');
46 assert(f.pbase() != 0);
47 assert(f.pptr() == f.pbase());
48 assert(f.epptr() - f.pbase() == 4095);
49 }
50 {
51 test_buf<char> f;
52 assert(f.open("overflow.dat", std::ios_base::in) != 0);
53 assert(f.is_open());
54 assert(f.sgetc() == 'a');
55 }
56 std::remove("overflow.dat");
57 {
58 test_buf<char> f;
59 f.pubsetbuf(0, 0);
60 assert(f.open("overflow.dat", std::ios_base::out) != 0);
61 assert(f.is_open());
62 assert(f.pbase() == 0);
63 assert(f.pptr() == 0);
64 assert(f.epptr() == 0);
65 assert(f.overflow('a') == 'a');
66 assert(f.pbase() == 0);
67 assert(f.pptr() == 0);
68 assert(f.epptr() == 0);
69 }
70 {
71 test_buf<char> f;
72 assert(f.open("overflow.dat", std::ios_base::in) != 0);
73 assert(f.is_open());
74 assert(f.sgetc() == 'a');
75 }
76 std::remove("overflow.dat");
77 {
78 test_buf<wchar_t> f;
79 assert(f.open("overflow.dat", std::ios_base::out) != 0);
80 assert(f.is_open());
81 assert(f.pbase() == 0);
82 assert(f.pptr() == 0);
83 assert(f.epptr() == 0);
84 assert(f.overflow(L'a') == L'a');
85 assert(f.pbase() != 0);
86 assert(f.pptr() == f.pbase());
87 assert(f.epptr() - f.pbase() == 4095);
88 }
89 {
90 test_buf<wchar_t> f;
91 assert(f.open("overflow.dat", std::ios_base::in) != 0);
92 assert(f.is_open());
93 assert(f.sgetc() == L'a');
94 }
95 std::remove("overflow.dat");
96 {
97 test_buf<wchar_t> f;
98 f.pubsetbuf(0, 0);
99 assert(f.open("overflow.dat", std::ios_base::out) != 0);
100 assert(f.is_open());
101 assert(f.pbase() == 0);
102 assert(f.pptr() == 0);
103 assert(f.epptr() == 0);
104 assert(f.overflow(L'a') == L'a');
105 assert(f.pbase() == 0);
106 assert(f.pptr() == 0);
107 assert(f.epptr() == 0);
108 }
109 {
110 test_buf<wchar_t> f;
111 assert(f.open("overflow.dat", std::ios_base::in) != 0);
112 assert(f.is_open());
113 assert(f.sgetc() == L'a');
114 }
115 std::remove("overflow.dat");
116 {
117 test_buf<wchar_t> f;
118 f.pubimbue(std::locale("en_US.UTF-8"));
119 assert(f.open("overflow.dat", std::ios_base::out) != 0);
120 assert(f.sputc(0x4E51) == 0x4E51);
121 assert(f.sputc(0x4E52) == 0x4E52);
122 assert(f.sputc(0x4E53) == 0x4E53);
123 }
124 {
125 test_buf<char> f;
126 assert(f.open("overflow.dat", std::ios_base::in) != 0);
127 assert(f.is_open());
128 assert(f.sbumpc() == 0xE4);
129 assert(f.sbumpc() == 0xB9);
130 assert(f.sbumpc() == 0x91);
131 assert(f.sbumpc() == 0xE4);
132 assert(f.sbumpc() == 0xB9);
133 assert(f.sbumpc() == 0x92);
134 assert(f.sbumpc() == 0xE4);
135 assert(f.sbumpc() == 0xB9);
136 assert(f.sbumpc() == 0x93);
137 assert(f.sbumpc() == -1);
138 }
139 std::remove("overflow.dat");
140}