1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <streambuf>
11 
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_streambuf;
14 
15 // void pbump(int n);
16 //
17 // REQUIRES: long_tests
18 
19 // This test allocates 4GiB of 'a', which is not possible on a typical mobile
20 // device.
21 // UNSUPPORTED: android
22 
23 #include <sstream>
24 #include <cassert>
25 #include "test_macros.h"
26 
27 struct SB : std::stringbuf
28 {
SBSB29   SB() : std::stringbuf(std::ios::ate|std::ios::out) { }
pubpbaseSB30   const char* pubpbase() const { return pbase(); }
pubpptrSB31   const char* pubpptr() const { return pptr(); }
32 };
33 
main()34 int main()
35 {
36 #ifndef TEST_HAS_NO_EXCEPTIONS
37     try {
38 #endif
39         std::string str(2147483648, 'a');
40         SB sb;
41         sb.str(str);
42         assert(sb.pubpbase() <= sb.pubpptr());
43 #ifndef TEST_HAS_NO_EXCEPTIONS
44     }
45     catch (const std::length_error &) {} // maybe the string can't take 2GB
46     catch (const std::bad_alloc    &) {} // maybe we don't have enough RAM
47 #endif
48 }
49