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gerrit-public.fairphone.software / platform / external / libcxx / 1d4a1edbc7e4461b59239e1b8297e9dd395a6322 / . / test / std / input.output / file.streams / fstreams / filebuf.virtuals / overflow.pass.cpp
blob: 1da38569821051e64f7db556407cb640b1e7e707 [file] [log] [blame]
Howard Hinnantbc8d3f92010-05-11 19:42:16 +0000[diff] [blame]1//===----------------------------------------------------------------------===//
2//
Howard Hinnantf5256e12010-05-11 21:36:01 +0000[diff] [blame]3// The LLVM Compiler Infrastructure
Howard Hinnantbc8d3f92010-05-11 19:42:16 +0000[diff] [blame]4//
Howard Hinnantb64f8b02010-11-16 22:09:02 +0000[diff] [blame]5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
Howard Hinnantbc8d3f92010-05-11 19:42:16 +0000[diff] [blame]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
Marshall Clow83e2c4d2013-01-05 03:21:01 +0000[diff] [blame]19#include "platform_support.h" // locale name macros
Howard Hinnantc0d0cba2011-10-03 15:23:59 +0000[diff] [blame]20
Howard Hinnantbc8d3f92010-05-11 19:42:16 +0000[diff] [blame]21template <class CharT>
22struct test_buf
23 : public std::basic_filebuf<CharT>
24{
25 typedef std::basic_filebuf<CharT> base;
26 typedef typename base::char_type char_type;
27 typedef typename base::int_type int_type;
28 typedef typename base::traits_type traits_type;
29
30 char_type* pbase() const {return base::pbase();}
31 char_type* pptr() const {return base::pptr();}
32 char_type* epptr() const {return base::epptr();}
33 void gbump(int n) {base::gbump(n);}
34
35 virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);}
36};
37
38int main()
39{
40 {
41 test_buf<char> f;
42 assert(f.open("overflow.dat", std::ios_base::out) != 0);
43 assert(f.is_open());
44 assert(f.pbase() == 0);
45 assert(f.pptr() == 0);
46 assert(f.epptr() == 0);
47 assert(f.overflow('a') == 'a');
48 assert(f.pbase() != 0);
49 assert(f.pptr() == f.pbase());
50 assert(f.epptr() - f.pbase() == 4095);
51 }
52 {
53 test_buf<char> f;
54 assert(f.open("overflow.dat", std::ios_base::in) != 0);
55 assert(f.is_open());
56 assert(f.sgetc() == 'a');
57 }
58 std::remove("overflow.dat");
59 {
60 test_buf<char> f;
61 f.pubsetbuf(0, 0);
62 assert(f.open("overflow.dat", std::ios_base::out) != 0);
63 assert(f.is_open());
64 assert(f.pbase() == 0);
65 assert(f.pptr() == 0);
66 assert(f.epptr() == 0);
67 assert(f.overflow('a') == 'a');
68 assert(f.pbase() == 0);
69 assert(f.pptr() == 0);
70 assert(f.epptr() == 0);
71 }
72 {
73 test_buf<char> f;
74 assert(f.open("overflow.dat", std::ios_base::in) != 0);
75 assert(f.is_open());
76 assert(f.sgetc() == 'a');
77 }
78 std::remove("overflow.dat");
79 {
80 test_buf<wchar_t> f;
81 assert(f.open("overflow.dat", std::ios_base::out) != 0);
82 assert(f.is_open());
83 assert(f.pbase() == 0);
84 assert(f.pptr() == 0);
85 assert(f.epptr() == 0);
86 assert(f.overflow(L'a') == L'a');
87 assert(f.pbase() != 0);
88 assert(f.pptr() == f.pbase());
89 assert(f.epptr() - f.pbase() == 4095);
90 }
91 {
92 test_buf<wchar_t> f;
93 assert(f.open("overflow.dat", std::ios_base::in) != 0);
94 assert(f.is_open());
95 assert(f.sgetc() == L'a');
96 }
97 std::remove("overflow.dat");
98 {
99 test_buf<wchar_t> f;
100 f.pubsetbuf(0, 0);
101 assert(f.open("overflow.dat", std::ios_base::out) != 0);
102 assert(f.is_open());
103 assert(f.pbase() == 0);
104 assert(f.pptr() == 0);
105 assert(f.epptr() == 0);
106 assert(f.overflow(L'a') == L'a');
107 assert(f.pbase() == 0);
108 assert(f.pptr() == 0);
109 assert(f.epptr() == 0);
110 }
111 {
112 test_buf<wchar_t> f;
113 assert(f.open("overflow.dat", std::ios_base::in) != 0);
114 assert(f.is_open());
115 assert(f.sgetc() == L'a');
116 }
117 std::remove("overflow.dat");
118 {
119 test_buf<wchar_t> f;
Howard Hinnantc0d0cba2011-10-03 15:23:59 +0000[diff] [blame]120 f.pubimbue(std::locale(LOCALE_en_US_UTF_8));
Howard Hinnantbc8d3f92010-05-11 19:42:16 +0000[diff] [blame]121 assert(f.open("overflow.dat", std::ios_base::out) != 0);
122 assert(f.sputc(0x4E51) == 0x4E51);
123 assert(f.sputc(0x4E52) == 0x4E52);
124 assert(f.sputc(0x4E53) == 0x4E53);
125 }
126 {
127 test_buf<char> f;
128 assert(f.open("overflow.dat", std::ios_base::in) != 0);
129 assert(f.is_open());
130 assert(f.sbumpc() == 0xE4);
131 assert(f.sbumpc() == 0xB9);
132 assert(f.sbumpc() == 0x91);
133 assert(f.sbumpc() == 0xE4);
134 assert(f.sbumpc() == 0xB9);
135 assert(f.sbumpc() == 0x92);
136 assert(f.sbumpc() == 0xE4);
137 assert(f.sbumpc() == 0xB9);
138 assert(f.sbumpc() == 0x93);
139 assert(f.sbumpc() == -1);
140 }
141 std::remove("overflow.dat");
Howard Hinnant256813f2010-08-22 00:26:48 +0000[diff] [blame]142}