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, 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::string str_01("mykonos. . . or what?");
  25 std::string str_02("paris, or sainte-maxime?");
  26 std::string str_03;
  27 std::stringbuf strb_01(str_01);
  28 std::stringbuf strb_02(str_02, std::ios_base::in);
  29 std::stringbuf strb_03(str_03, std::ios_base::out);
  30
  31 // test overloaded virtual functions
  32 void test04()
  33 {
  34   bool test __attribute__((unused)) = true;
  35   std::string           str_tmp, str_tmp2;
  36   std::streamsize               strmsz_1, strmsz_2;
  37   typedef std::stringbuf::int_type int_type;
  38   typedef std::stringbuf::traits_type traits_type;
  39
  40   int_type c1 = strb_01.sbumpc();
  41   int_type c2 = strb_02.sbumpc();
  42   int_type c3 = strb_01.sbumpc();
  43   int_type c4 = strb_02.sbumpc();
  44
  45   // PUT
  46   strb_03.str(str_01); //reset
  47   std::string::size_type sz1 = strb_03.str().length();
  48   std::string::size_type sz2 = strb_03.str().length();
  49
  50   // streamsize sputn(const char_typs* s, streamsize n)
  51   // write up to n chars to out_cur from s, returning number assigned
  52   // NB *sputn will happily put '\0' into your stream if you give it a chance*
  53   str_tmp = strb_03.str();
  54   sz1 = str_tmp.length();
  55   strmsz_1 = strb_03.sputn("racadabras", 10);//"abracadabras or what?"
  56   sz2 = strb_03.str().length();
  57   strmsz_2 = strb_03.sputn(", i wanna reach out and", 10);
  58   sz2 = strb_03.str().length();
  59   str_tmp = strb_02.str();
  60   strmsz_1 = strb_02.sputn("racadabra", 10);
  61
  62   // PUTBACK
  63
  64   // int_type sputbackc(char_type c)
  65   // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
  66   // otherwise decrements in_cur and returns *gptr()
  67   strmsz_1 = strb_01.in_avail();
  68   str_tmp = strb_01.str();
  69   c1 = strb_01.sgetc(); //"mykonos. . . 'o'r what?"
  70   c2 = strb_01.sputbackc('z');//"mykonos. . .zor what?"
  71   c3 = strb_01.sgetc();
  72   str_tmp2 = strb_01.str();
  73   VERIFY( c1 != c2 );
  74   VERIFY( c3 == c2 );
  75   VERIFY( str_tmp2 == std::string("mzkonos. . . or what?") );
  76   VERIFY( str_tmp.size() == str_tmp2.size() );
  77   //test for _in_cur == _in_beg
  78   strb_01.str(str_tmp);
  79   strmsz_1 = strb_01.in_avail();
  80   c1 = strb_01.sgetc(); //"'m'ykonos. . . or what?"
  81   c2 = strb_01.sputbackc('z');//"mykonos. . . or what?"
  82   c3 = strb_01.sgetc();
  83   VERIFY( c1 != c2 );
  84   VERIFY( c3 != c2 );
  85   VERIFY( c1 == c3 );
  86   VERIFY( c2 == traits_type::eof() );
  87   VERIFY( strb_01.str() == str_tmp );
  88   VERIFY( str_tmp.size() == strb_01.str().size() );
  89   // test for replacing char with identical one
  90   strb_01.str(str_01); //reset
  91   strmsz_1 = strb_01.in_avail();
  92   strb_01.sbumpc();
  93   strb_01.sbumpc();
  94   c1 = strb_01.sgetc(); //"my'k'onos. . . or what?"
  95   c2 = strb_01.sputbackc('y');//"mykonos. . . or what?"
  96   c3 = strb_01.sgetc();
  97   VERIFY( c1 != c2 );
  98   VERIFY( c3 == c2 );
  99   VERIFY( c1 != c3 );
 100   VERIFY( strb_01.str() == str_01 );
 101   VERIFY( str_01.size() == strb_01.str().size() );
 102   //test for ios_base::out
 103   strmsz_2 = strb_03.in_avail();
 104   c4 = strb_03.sputbackc('x');
 105   VERIFY( c4 == traits_type::eof() );
 106 }
 107
 108 int main()
 109 {
 110   test04();
 111   return 0;
 112 }
 113
 114
 115
 116 // more candy!!!