Bitcoin Core  0.19.99
P2P Digital Currency
glibcxx_sanity.cpp
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1 // Copyright (c) 2009-2018 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <list>
6 #include <locale>
7 #include <stdexcept>
8 
9 namespace
10 {
11 // trigger: use ctype<char>::widen to trigger ctype<char>::_M_widen_init().
12 // test: convert a char from narrow to wide and back. Verify that the result
13 // matches the original.
14 bool sanity_test_widen(char testchar)
15 {
16  const std::ctype<char>& test(std::use_facet<std::ctype<char> >(std::locale()));
17  return test.narrow(test.widen(testchar), 'b') == testchar;
18 }
19 
20 // trigger: use list::push_back and list::pop_back to trigger _M_hook and
21 // _M_unhook.
22 // test: Push a sequence of integers into a list. Pop them off and verify that
23 // they match the original sequence.
24 bool sanity_test_list(unsigned int size)
25 {
26  std::list<unsigned int> test;
27  for (unsigned int i = 0; i != size; ++i)
28  test.push_back(i + 1);
29 
30  if (test.size() != size)
31  return false;
32 
33  while (!test.empty()) {
34  if (test.back() != test.size())
35  return false;
36  test.pop_back();
37  }
38  return true;
39 }
40 
41 } // namespace
42 
43 // trigger: string::at(x) on an empty string to trigger __throw_out_of_range_fmt.
44 // test: force std::string to throw an out_of_range exception. Verify that
45 // it's caught correctly.
47 {
48  std::string test;
49  try {
50  test.at(1);
51  } catch (const std::out_of_range&) {
52  return true;
53  } catch (...) {
54  }
55  return false;
56 }
57 
59 {
60  return sanity_test_widen('a') && sanity_test_list(100) && sanity_test_range_fmt();
61 }
bool sanity_test_range_fmt()
bool glibcxx_sanity_test()