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

   1 // 981208 bkoz test functionality of basic_stringbuf for char_type == char
   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::string str_01("mykonos. . . or what?");
  24 std::stringbuf strb_01(str_01);
  25
  26 // test overloaded virtual functions
  27 void test04()
  28 {
  29   bool test __attribute__((unused)) = true;
  30   std::string           str_tmp;
  31   typedef std::stringbuf::int_type int_type;
  32   typedef std::stringbuf::pos_type pos_type;
  33   typedef std::stringbuf::off_type off_type;
  34
  35   int_type c1 = strb_01.sbumpc();
  36   int_type c3 = strb_01.sbumpc();
  37
  38   pos_type pt_1(off_type(-1));
  39   pos_type pt_2(off_type(0));
  40   off_type off_1 = 0;
  41   off_type off_2 = 0;
  42
  43   // BUFFER MANAGEMENT & POSITIONING
  44
  45   // seekpos
  46   // pubseekpos(pos_type sp, ios_base::openmode)
  47   // alters the stream position to sp
  48   strb_01.str(str_01); //in|out ("mykonos. . . or what?");
  49
  50   //IN|OUT
  51   //beg
  52   pt_1 = strb_01.pubseekoff(2, std::ios_base::beg);
  53   off_1 = off_type(pt_1);
  54   VERIFY( off_1 >= 0 );
  55   pt_1 = strb_01.pubseekoff(0, std::ios_base::cur, std::ios_base::out);
  56   off_1 = off_type(pt_1);
  57   c1 = strb_01.snextc(); //current in pointer +1
  58   VERIFY( c1 == 'o' );
  59   strb_01.sputc('x');  //test current out pointer
  60   str_tmp = std::string("myxonos. . . or what?");
  61   VERIFY( strb_01.str() == str_tmp );
  62   strb_01.pubsync(); //resets pointers
  63   pt_2 = strb_01.pubseekpos(pt_1, std::ios_base::in|std::ios_base::out);
  64   off_2 = off_type(pt_2);
  65   VERIFY( off_1 == off_2 );
  66   c3 = strb_01.snextc(); //current in pointer +1
  67   VERIFY( c1 == c3 );
  68   strb_01.sputc('x');  //test current out pointer
  69   str_tmp = std::string("myxonos. . . or what?");
  70   VERIFY( strb_01.str() == str_tmp );
  71 }
  72
  73 int main()
  74 {
  75   test04();
  76   return 0;
  77 }
  78
  79
  80
  81 // more candy!!!