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
   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 2, 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 COPYING.  If not, write to the Free
  19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 // USA.
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 std::string str_01("mykonos. . . or what?");
  26 std::string str_02("paris, or sainte-maxime?");
  27 std::string str_03;
  28 std::stringbuf strb_01(str_01);
  29 std::stringbuf strb_02(str_02, std::ios_base::in);
  30 std::stringbuf strb_03(str_03, std::ios_base::out);
  31
  32 // test overloaded virtual functions
  33 void test04()
  34 {
  35   bool                  test = true;
  36   std::string           str_tmp, str_tmp2;
  37   std::stringbuf                strb_tmp;
  38   std::streamsize               strmsz_1, strmsz_2;
  39   std::streamoff                strmof_1(-1), strmof_2;
  40   typedef std::stringbuf::int_type int_type;
  41   typedef std::stringbuf::traits_type traits_type;
  42   typedef std::stringbuf::pos_type pos_type;
  43   typedef std::stringbuf::off_type off_type;
  44
  45   int_type c1 = strb_01.sbumpc();
  46   int_type c2 = strb_02.sbumpc();
  47   int_type c3 = strb_01.sbumpc();
  48   int_type c4 = strb_02.sbumpc();
  49   int_type c5 = strb_03.sbumpc();
  50
  51   // PUT
  52   strb_03.str(str_01); //reset
  53   std::string::size_type sz1 = strb_03.str().length();
  54   std::string::size_type sz2 = strb_03.str().length();
  55
  56   // streamsize sputn(const char_typs* s, streamsize n)
  57   // write up to n chars to out_cur from s, returning number assigned
  58   // NB *sputn will happily put '\0' into your stream if you give it a chance*
  59   str_tmp = strb_03.str();
  60   sz1 = str_tmp.length();
  61   strmsz_1 = strb_03.sputn("racadabras", 10);//"abracadabras or what?"
  62   sz2 = strb_03.str().length();
  63   strmsz_2 = strb_03.sputn(", i wanna reach out and", 10);
  64   sz2 = strb_03.str().length();
  65   str_tmp = strb_02.str();
  66   strmsz_1 = strb_02.sputn("racadabra", 10);
  67
  68   // PUTBACK
  69
  70   // int_type sputbackc(char_type c)
  71   // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail
  72   // otherwise decrements in_cur and returns *gptr()
  73   strmsz_1 = strb_01.in_avail();
  74   str_tmp = strb_01.str();
  75   c1 = strb_01.sgetc(); //"mykonos. . . 'o'r what?"
  76   c2 = strb_01.sputbackc('z');//"mykonos. . .zor what?"
  77   c3 = strb_01.sgetc();
  78   str_tmp2 = strb_01.str();
  79   VERIFY( c1 != c2 );
  80   VERIFY( c3 == c2 );
  81   VERIFY( str_tmp2 == std::string("mzkonos. . . or what?") );
  82   VERIFY( str_tmp.size() == str_tmp2.size() );
  83   //test for _in_cur == _in_beg
  84   strb_01.str(str_tmp);
  85   strmsz_1 = strb_01.in_avail();
  86   c1 = strb_01.sgetc(); //"'m'ykonos. . . or what?"
  87   c2 = strb_01.sputbackc('z');//"mykonos. . . or what?"
  88   c3 = strb_01.sgetc();
  89   VERIFY( c1 != c2 );
  90   VERIFY( c3 != c2 );
  91   VERIFY( c1 == c3 );
  92   VERIFY( c2 == traits_type::eof() );
  93   VERIFY( strb_01.str() == str_tmp );
  94   VERIFY( str_tmp.size() == strb_01.str().size() );
  95   // test for replacing char with identical one
  96   strb_01.str(str_01); //reset
  97   strmsz_1 = strb_01.in_avail();
  98   strb_01.sbumpc();
  99   strb_01.sbumpc();
 100   c1 = strb_01.sgetc(); //"my'k'onos. . . or what?"
 101   c2 = strb_01.sputbackc('y');//"mykonos. . . or what?"
 102   c3 = strb_01.sgetc();
 103   VERIFY( c1 != c2 );
 104   VERIFY( c3 == c2 );
 105   VERIFY( c1 != c3 );
 106   VERIFY( strb_01.str() == str_01 );
 107   VERIFY( str_01.size() == strb_01.str().size() );
 108   //test for ios_base::out
 109   strmsz_2 = strb_03.in_avail();
 110   c4 = strb_03.sputbackc('x');
 111   VERIFY( c4 == traits_type::eof() );
 112 }
 113
 114 int main()
 115 {
 116   test04();
 117   return 0;
 118 }
 119
 120
 121
 122 // more candy!!!