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23cac885 | 1 | // 1999-10-11 bkoz |
afb6c265 | 2 | |
8d9254fc | 3 | // Copyright (C) 1999-2020 Free Software Foundation, Inc. |
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4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
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9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
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17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
afb6c265 | 20 | |
23cac885 | 21 | // 27.5.2 template class basic_streambuf |
afb6c265 | 22 | |
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23 | #include <sstream> |
24 | #include <testsuite_hooks.h> | |
25 | ||
23cac885 | 26 | class setpbuf : public std::stringbuf |
afb6c265 | 27 | { |
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28 | char buffer[4]; |
29 | std::string result; | |
afb6c265 | 30 | |
23cac885 | 31 | public: |
afb6c265 | 32 | |
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33 | std::string& |
34 | get_result() | |
35 | { return result; } | |
afb6c265 | 36 | |
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37 | setpbuf() |
38 | { | |
39 | char foo [32]; | |
40 | setp(foo, foo + 32); | |
41 | setp(buffer, buffer + 4); | |
42 | } | |
43 | ||
44 | ~setpbuf() | |
45 | { sync(); } | |
46 | ||
47 | virtual int_type | |
48 | overflow(int_type n) | |
49 | { | |
50 | if (sync() != 0) | |
51 | return traits_type::eof(); | |
52 | ||
53 | result += traits_type::to_char_type(n); | |
54 | ||
55 | return n; | |
56 | } | |
ff5d863f | 57 | |
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58 | virtual int |
59 | sync() | |
ff5d863f | 60 | { |
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61 | result.append(pbase(), pptr()); |
62 | setp(buffer, buffer + 4); | |
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63 | return 0; |
64 | } | |
65 | }; | |
66 | ||
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67 | // libstdc++/1057 |
68 | void test04() | |
ff5d863f | 69 | { |
23cac885 | 70 | std::string text = "abcdefghijklmn"; |
ff5d863f | 71 | |
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72 | // 01 |
73 | setpbuf sp1; | |
74 | // Here xsputn writes over sp1.result | |
75 | sp1.sputn(text.c_str(), text.length()); | |
ff5d863f | 76 | |
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77 | // This crashes when result is accessed |
78 | sp1.pubsync(); | |
79 | VERIFY( sp1.get_result() == text ); | |
80 | ||
81 | // 02 | |
82 | setpbuf sp2; | |
83 | for (std::string::size_type i = 0; i < text.length(); ++i) | |
84 | { | |
85 | // sputc also writes over result | |
86 | sp2.sputc(text[i]); | |
87 | } | |
88 | ||
89 | // Crash here | |
90 | sp2.pubsync(); | |
91 | VERIFY( sp2.get_result() == text ); | |
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92 | } |
93 | ||
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94 | int main() |
95 | { | |
23cac885 | 96 | test04(); |
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97 | return 0; |
98 | } |