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

   1 // 981208 bkoz test functionality of basic_stringbuf for char_type == char
   2
   3 // Copyright (C) 1997-2021 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::string str_02("paris, or sainte-maxime?");
  25 std::string str_03;
  26 std::stringbuf strb_01(str_01);
  27 std::stringbuf strb_02(str_02, std::ios_base::in);
  28 std::stringbuf strb_03(str_03, std::ios_base::out);
  29
  30 // test overloaded virtual functions
  31 void test04()
  32 {
  33   std::string           str_tmp;
  34   std::streamsize               strmsz_1, strmsz_2;
  35   typedef std::stringbuf::int_type int_type;
  36   typedef std::stringbuf::traits_type traits_type;
  37
  38   // PUT
  39   strb_03.str(str_01); //reset
  40   std::string::size_type sz1 = strb_03.str().length();
  41   std::string::size_type sz2 = strb_03.str().length();
  42
  43   // streamsize sputn(const char_typs* s, streamsize n)
  44   // write up to n chars to out_cur from s, returning number assigned
  45   // NB *sputn will happily put '\0' into your stream if you give it a chance*
  46   str_tmp = strb_03.str();
  47   sz1 = str_tmp.length();
  48   strmsz_1 = strb_03.sputn("racadabras", 10);//"abracadabras or what?"
  49   sz2 = strb_03.str().length();
  50   VERIFY( sz1 == sz2 ); //shouldn't have changed length
  51   VERIFY( strmsz_1 == 10 );
  52   VERIFY( str_tmp != strb_03.str() );
  53   strmsz_2 = strb_03.sputn(", i wanna reach out and", 23);
  54   VERIFY( strmsz_1 != strmsz_2 ); // should re-allocate, copy 10 chars.
  55   VERIFY( strmsz_1 == 10 );
  56   VERIFY( strmsz_2 == 23 );
  57   sz2 = strb_03.str().length();
  58   VERIFY( sz1 != sz2 ); // need to change length
  59   VERIFY( str_tmp != strb_03.str() );
  60   str_tmp = strb_02.str();
  61   strmsz_1 = strb_02.sputn("racadabra", 10);
  62   VERIFY( strmsz_1 == 0 );
  63   VERIFY( str_tmp == strb_02.str() );
  64 }
  65
  66 int main()
  67 {
  68   test04();
  69   return 0;
  70 }
  71
  72
  73
  74 // more candy!!!