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

   1 // 981208 bkoz test functionality of basic_stringbuf for char_type == wchar_t
   2
   3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 std::wstring str_01(L"mykonos. . . or what?");
  25 std::wstringbuf strb_01(str_01);
  26
  27 // test overloaded virtual functions
  28 void test04()
  29 {
  30   bool test __attribute__((unused)) = true;
  31   std::wstring          str_tmp;
  32   std::streamsize               strmsz_1, strmsz_2;
  33   typedef std::wstringbuf::int_type int_type;
  34   typedef std::wstringbuf::traits_type traits_type;
  35   typedef std::wstringbuf::pos_type pos_type;
  36   typedef std::wstringbuf::off_type off_type;
  37
  38   int_type c1 = strb_01.sbumpc();
  39   int_type c2, c3;
  40
  41   // BUFFER MANAGEMENT & POSITIONING
  42
  43   // seekoff
  44   // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
  45   // alters the stream position to off
  46   pos_type pt_1(off_type(-1));
  47   pos_type pt_2(off_type(0));
  48   off_type off_1 = 0;
  49   off_type off_2 = 0;
  50   strb_01.str(str_01); //in|out ("mykonos. . . or what?");
  51
  52   //IN|OUT
  53   //beg
  54   pt_1 = strb_01.pubseekoff(2, std::ios_base::beg);
  55   off_1 = off_type(pt_1);
  56   VERIFY( off_1 >= 0 );
  57   c1 = strb_01.snextc(); //current in pointer +1
  58   VERIFY( c1 == L'o' );
  59   c2 = strb_01.sputc(L'x');  //test current out pointer
  60   str_tmp = std::wstring(L"myxonos. . . or what?");
  61   VERIFY( strb_01.str() == str_tmp );
  62   //cur
  63   pt_1 = strb_01.pubseekoff(2, std::ios_base::cur);
  64   off_1 = off_type(pt_1);
  65   VERIFY( off_1 == -1 ); // can't seekoff for in and out + cur in sstreams
  66   pt_1 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
  67   off_1 = off_type(pt_1);
  68   pt_2 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
  69   off_2 = off_type(pt_2);
  70   VERIFY( off_2 == off_1 + 2 );
  71   c1 = strb_01.snextc(); //current in pointer + 1
  72   VERIFY( c1 == L' ' );
  73   c2 = strb_01.sputc(L'x');  //test current out pointer
  74   str_tmp = std::wstring(L"myxxnos. . . or what?");
  75   VERIFY( strb_01.str() == str_tmp );
  76   //end
  77   pt_2 = strb_01.pubseekoff(2, std::ios_base::end);
  78   off_1 = off_type(pt_2);
  79   VERIFY( off_1 == -1 ); // not a valid position
  80   VERIFY( strb_01.str() == str_tmp );
  81   // end part two (from the filebuf tests)
  82   strb_01.pubseekoff(0, std::ios_base::end);
  83   strmsz_1 = strb_01.in_avail(); // 0 cuz at the end
  84   c1 = strb_01.sgetc();
  85   c2 = strb_01.sungetc();
  86   strmsz_2 = strb_01.in_avail(); // 1
  87   c3 = strb_01.sgetc();
  88   VERIFY( c1 != c2 );
  89   VERIFY( strmsz_2 != strmsz_1 );
  90   VERIFY( strmsz_2 == 1 );
  91   // end part three
  92   strmsz_1 = strb_01.str().size();
  93   strmsz_2 = strb_01.sputn(L" ravi shankar meets carlos santana in LoHa", 90);
  94   strb_01.pubseekoff(0, std::ios_base::end);
  95   strb_01.sputc(L'<');
  96   str_tmp = strb_01.str();
  97   VERIFY(static_cast<std::streamsize>(str_tmp.size()) == strmsz_1 + strmsz_2 + 1);
  98   // IN
  99   // OUT
 100 }
 101
 102 int main()
 103 {
 104   test04();
 105   return 0;
 106 }
 107
 108
 109
 110 // more candy!!!