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      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 // <sstream>
     11 
     12 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
     13 // class basic_stringbuf
     14 
     15 // pos_type seekpos(pos_type sp,
     16 //                  ios_base::openmode which = ios_base::in | ios_base::out);
     17 
     18 #include <sstream>
     19 #include <cassert>
     20 
     21 int main()
     22 {
     23     {
     24         std::stringbuf sb("0123456789", std::ios_base::in);
     25         assert(sb.pubseekpos(3, std::ios_base::out) == -1);
     26         assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);
     27         assert(sb.pubseekpos(3, std::ios_base::in) == 3);
     28         assert(sb.sgetc() == '3');
     29     }
     30     {
     31         std::stringbuf sb("0123456789", std::ios_base::out);
     32         assert(sb.pubseekpos(3, std::ios_base::in) == -1);
     33         assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == -1);
     34         assert(sb.pubseekpos(3, std::ios_base::out) == 3);
     35         assert(sb.sputc('a') == 'a');
     36         assert(sb.str() == "012a456789");
     37     }
     38     {
     39         std::stringbuf sb("0123456789");
     40         assert(sb.pubseekpos(3, std::ios_base::in) == 3);
     41         assert(sb.sgetc() == '3');
     42         assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);
     43         assert(sb.sgetc() == '3');
     44         assert(sb.sputc('a') == 'a');
     45         assert(sb.str() == "012a456789");
     46         assert(sb.pubseekpos(3, std::ios_base::out) == 3);
     47         assert(sb.sputc('3') == '3');
     48         assert(sb.str() == "0123456789");
     49     }
     50     {
     51         std::wstringbuf sb(L"0123456789", std::ios_base::in);
     52         assert(sb.pubseekpos(3, std::ios_base::out) == -1);
     53         assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);
     54         assert(sb.pubseekpos(3, std::ios_base::in) == 3);
     55         assert(sb.sgetc() == L'3');
     56     }
     57     {
     58         std::wstringbuf sb(L"0123456789", std::ios_base::out);
     59         assert(sb.pubseekpos(3, std::ios_base::in) == -1);
     60         assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == -1);
     61         assert(sb.pubseekpos(3, std::ios_base::out) == 3);
     62         assert(sb.sputc(L'a') == L'a');
     63         assert(sb.str() == L"012a456789");
     64     }
     65     {
     66         std::wstringbuf sb(L"0123456789");
     67         assert(sb.pubseekpos(3, std::ios_base::in) == 3);
     68         assert(sb.sgetc() == L'3');
     69         assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);
     70         assert(sb.sgetc() == L'3');
     71         assert(sb.sputc(L'a') == L'a');
     72         assert(sb.str() == L"012a456789");
     73         assert(sb.pubseekpos(3, std::ios_base::out) == 3);
     74         assert(sb.sputc(L'3') == L'3');
     75         assert(sb.str() == L"0123456789");
     76     }
     77 }
     78