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) 1997-2014 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   bool test __attribute__((unused)) = true;
  30   std::wstring          str_tmp;
  31   std::streamsize               strmsz_1, strmsz_2;
  32   typedef std::wstringbuf::int_type int_type;
  33   typedef std::wstringbuf::traits_type traits_type;
  34   typedef std::wstringbuf::pos_type pos_type;
  35   typedef std::wstringbuf::off_type off_type;
  36
  37   int_type c1 = strb_01.sbumpc();
  38   int_type c2;
  39
  40   // BUFFER MANAGEMENT & POSITIONING
  41
  42   // seekoff
  43   // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
  44   // alters the stream position to off
  45   pos_type pt_1(off_type(-1));
  46   pos_type pt_2(off_type(0));
  47   off_type off_1 = 0;
  48   off_type off_2 = 0;
  49   strb_01.str(str_01); //in|out ("mykonos. . . or what?");
  50
  51   //IN|OUT
  52   //beg
  53   pt_1 = strb_01.pubseekoff(2, std::ios_base::beg);
  54   off_1 = off_type(pt_1);
  55   VERIFY( off_1 >= 0 );
  56   c1 = strb_01.snextc(); //current in pointer +1
  57   VERIFY( c1 == L'o' );
  58   c2 = 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   //cur
  62   pt_1 = strb_01.pubseekoff(2, std::ios_base::cur);
  63   off_1 = off_type(pt_1);
  64   VERIFY( off_1 == -1 ); // can't seekoff for in and out + cur in sstreams
  65   pt_1 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
  66   off_1 = off_type(pt_1);
  67   pt_2 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
  68   off_2 = off_type(pt_2);
  69   VERIFY( off_2 == off_1 + 2 );
  70   c1 = strb_01.snextc(); //current in pointer + 1
  71   VERIFY( c1 == L' ' );
  72   c2 = strb_01.sputc(L'x');  //test current out pointer
  73   str_tmp = std::wstring(L"myxxnos. . . or what?");
  74   VERIFY( strb_01.str() == str_tmp );
  75   //end
  76   pt_2 = strb_01.pubseekoff(2, std::ios_base::end);
  77   off_1 = off_type(pt_2);
  78   VERIFY( off_1 == -1 ); // not a valid position
  79   VERIFY( strb_01.str() == str_tmp );
  80   // end part two (from the filebuf tests)
  81   strb_01.pubseekoff(0, std::ios_base::end);
  82   strmsz_1 = strb_01.in_avail(); // 0 cuz at the end
  83   c1 = strb_01.sgetc();
  84   c2 = strb_01.sungetc();
  85   strmsz_2 = strb_01.in_avail(); // 1
  86   strb_01.sgetc();
  87   VERIFY( c1 != c2 );
  88   VERIFY( strmsz_2 != strmsz_1 );
  89   VERIFY( strmsz_2 == 1 );
  90   // end part three
  91   strmsz_1 = strb_01.str().size();
  92   strmsz_2 = strb_01.sputn(L" ravi shankar meets carlos santana in LoHa", 90);
  93   strb_01.pubseekoff(0, std::ios_base::end);
  94   strb_01.sputc(L'<');
  95   str_tmp = strb_01.str();
  96   VERIFY(static_cast<std::streamsize>(str_tmp.size()) == strmsz_1 + strmsz_2 + 1);
  97   // IN
  98   // OUT
  99 }
 100
 101 int main()
 102 {
 103   test04();
 104   return 0;
 105 }
 106
 107
 108
 109 // more candy!!!