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23cac885 | 1 | // 1999-10-11 bkoz |
b2dad0e3 | 2 | |
83ffe9cd | 3 | // Copyright (C) 1999-2023 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 | ||
b2dad0e3 | 20 | |
23cac885 | 21 | // 27.5.2 template class basic_streambuf |
b2dad0e3 | 22 | |
23cac885 | 23 | #include <streambuf> |
6f422965 | 24 | #include <string> |
f13a69ec | 25 | #include <testsuite_hooks.h> |
b2dad0e3 | 26 | |
23cac885 | 27 | class setpbuf : public std::streambuf |
bcc6a03a | 28 | { |
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29 | char buffer[4]; |
30 | std::string result; | |
31 | ||
32 | public: | |
33 | ||
34 | std::string& | |
35 | get_result() | |
36 | { return result; } | |
37 | ||
38 | setpbuf() | |
39 | { | |
40 | char foo [32]; | |
41 | setp(foo, foo + 32); | |
42 | setp(buffer, buffer + 4); | |
43 | } | |
bcc6a03a | 44 | |
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45 | ~setpbuf() |
46 | { sync(); } | |
47 | ||
48 | virtual int_type | |
49 | overflow(int_type n) | |
50 | { | |
51 | if (sync() != 0) | |
52 | return traits_type::eof(); | |
53 | ||
54 | result += traits_type::to_char_type(n); | |
55 | ||
56 | return n; | |
57 | } | |
58 | ||
59 | virtual int | |
60 | sync() | |
61 | { | |
62 | result.append(pbase(), pptr()); | |
63 | setp(buffer, buffer + 4); | |
64 | return 0; | |
65 | } | |
66 | }; | |
67 | ||
68 | // libstdc++/1057 | |
69 | void test04() | |
e6705174 | 70 | { |
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71 | std::string text = "abcdefghijklmn"; |
72 | ||
73 | // 01 | |
74 | setpbuf sp1; | |
75 | // Here xsputn writes over sp1.result | |
76 | sp1.sputn(text.c_str(), text.length()); | |
77 | ||
78 | // This crashes when result is accessed | |
79 | sp1.pubsync(); | |
80 | VERIFY( sp1.get_result() == text ); | |
81 | ||
82 | // 02 | |
83 | setpbuf sp2; | |
84 | for (std::string::size_type i = 0; i < text.length(); ++i) | |
85 | { | |
86 | // sputc also writes over result | |
87 | sp2.sputc(text[i]); | |
88 | } | |
89 | ||
90 | // Crash here | |
91 | sp2.pubsync(); | |
92 | VERIFY( sp2.get_result() == text ); | |
93 | } | |
b2dad0e3 | 94 | |
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95 | int main() |
96 | { | |
23cac885 | 97 | test04(); |
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98 | return 0; |
99 | } |