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

   1 // 981208 bkoz test functionality of basic_stringbuf for char_type == char
   2
   3 // Copyright (C) 1997-2013 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   bool test __attribute__((unused)) = true;
  34   std::string           str_tmp, str_tmp2;
  35   typedef std::stringbuf::int_type int_type;
  36   typedef std::stringbuf::traits_type traits_type;
  37
  38   int_type c1 = strb_01.sbumpc();
  39   int_type c2 = strb_02.sbumpc();
  40   int_type c3 = strb_01.sbumpc();
  41   int_type c4 = strb_02.sbumpc();
  42
  43   // PUT
  44   strb_03.str(str_01); //reset
  45   strb_03.str().length();
  46   strb_03.str().length();
  47
  48   // streamsize sputn(const char_typs* s, streamsize n)
  49   // write up to n chars to out_cur from s, returning number assigned
  50   // NB *sputn will happily put '\0' into your stream if you give it a chance*
  51   str_tmp = strb_03.str();
  52   str_tmp.length();
  53   strb_03.sputn("racadabras", 10);//"abracadabras or what?"
  54   strb_03.str().length();
  55   strb_03.sputn(", i wanna reach out and", 10);
  56   strb_03.str().length();
  57   str_tmp = strb_02.str();
  58   strb_02.sputn("racadabra", 10);
  59
  60   // PUTBACK
  61
  62   // int_type sputbackc(char_type c)
  63   // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
  64   // otherwise decrements in_cur and returns *gptr()
  65   strb_01.in_avail();
  66   str_tmp = strb_01.str();
  67   c1 = strb_01.sgetc(); //"mykonos. . . 'o'r what?"
  68   c2 = strb_01.sputbackc('z');//"mykonos. . .zor what?"
  69   c3 = strb_01.sgetc();
  70   str_tmp2 = strb_01.str();
  71   VERIFY( c1 != c2 );
  72   VERIFY( c3 == c2 );
  73   VERIFY( str_tmp2 == std::string("mzkonos. . . or what?") );
  74   VERIFY( str_tmp.size() == str_tmp2.size() );
  75   //test for _in_cur == _in_beg
  76   strb_01.str(str_tmp);
  77   strb_01.in_avail();
  78   c1 = strb_01.sgetc(); //"'m'ykonos. . . or what?"
  79   c2 = strb_01.sputbackc('z');//"mykonos. . . or what?"
  80   c3 = strb_01.sgetc();
  81   VERIFY( c1 != c2 );
  82   VERIFY( c3 != c2 );
  83   VERIFY( c1 == c3 );
  84   VERIFY( c2 == traits_type::eof() );
  85   VERIFY( strb_01.str() == str_tmp );
  86   VERIFY( str_tmp.size() == strb_01.str().size() );
  87   // test for replacing char with identical one
  88   strb_01.str(str_01); //reset
  89   strb_01.in_avail();
  90   strb_01.sbumpc();
  91   strb_01.sbumpc();
  92   c1 = strb_01.sgetc(); //"my'k'onos. . . or what?"
  93   c2 = strb_01.sputbackc('y');//"mykonos. . . or what?"
  94   c3 = strb_01.sgetc();
  95   VERIFY( c1 != c2 );
  96   VERIFY( c3 == c2 );
  97   VERIFY( c1 != c3 );
  98   VERIFY( strb_01.str() == str_01 );
  99   VERIFY( str_01.size() == strb_01.str().size() );
 100   //test for ios_base::out
 101   strb_03.in_avail();
 102   c4 = strb_03.sputbackc('x');
 103   VERIFY( c4 == traits_type::eof() );
 104 }
 105
 106 int main()
 107 {
 108   test04();
 109   return 0;
 110 }
 111
 112
 113
 114 // more candy!!!