libstdc++-v3/testsuite/27_io/basic_stringbuf/seekpos/wchar_t/1.cc

   1 // 981208 bkoz test functionality of basic_stringbuf for char_type == wchar_t
   2
   3 // Copyright (C) 1997-2024 Free Software Foundation, Inc.
   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
   8 // Free Software Foundation; either version 3, or (at your option)
   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
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <sstream>
  21 #include <testsuite_hooks.h>
  22
  23 std::wstring str_01(L"mykonos. . . or what?");
  24 std::wstringbuf strb_01(str_01);
  25
  26 // test overloaded virtual functions
  27 void test04()
  28 {
  29   std::wstring          str_tmp;
  30   typedef std::wstringbuf::int_type int_type;
  31   typedef std::wstringbuf::pos_type pos_type;
  32   typedef std::wstringbuf::off_type off_type;
  33
  34   int_type c1 = strb_01.sbumpc();
  35   int_type c3 = strb_01.sbumpc();
  36
  37   pos_type pt_1(off_type(-1));
  38   pos_type pt_2(off_type(0));
  39   off_type off_1 = 0;
  40   off_type off_2 = 0;
  41
  42   // BUFFER MANAGEMENT & POSITIONING
  43
  44   // seekpos
  45   // pubseekpos(pos_type sp, ios_base::openmode)
  46   // alters the stream position to sp
  47   strb_01.str(str_01); //in|out ("mykonos. . . or what?");
  48
  49   //IN|OUT
  50   //beg
  51   pt_1 = strb_01.pubseekoff(2, std::ios_base::beg);
  52   off_1 = off_type(pt_1);
  53   VERIFY( off_1 >= 0 );
  54   pt_1 = strb_01.pubseekoff(0, std::ios_base::cur, std::ios_base::out);
  55   off_1 = off_type(pt_1);
  56   c1 = strb_01.snextc(); //current in pointer +1
  57   VERIFY( c1 == L'o' );
  58   strb_01.sputc(L'x');  //test current out pointer
  59   str_tmp = std::wstring(L"myxonos. . . or what?");
  60   VERIFY( strb_01.str() == str_tmp );
  61   strb_01.pubsync(); //resets pointers
  62   pt_2 = strb_01.pubseekpos(pt_1, std::ios_base::in|std::ios_base::out);
  63   off_2 = off_type(pt_2);
  64   VERIFY( off_1 == off_2 );
  65   c3 = strb_01.snextc(); //current in pointer +1
  66   VERIFY( c1 == c3 );
  67   strb_01.sputc(L'x');  //test current out pointer
  68   str_tmp = std::wstring(L"myxonos. . . or what?");
  69   VERIFY( strb_01.str() == str_tmp );
  70 }
  71
  72 int main()
  73 {
  74   test04();
  75   return 0;
  76 }
  77
  78
  79
  80 // more candy!!!