libstdc++-v3/testsuite/27_io/basic_streambuf/overflow/char/1.cc

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999-2013 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
  21 // 27.5.2 template class basic_streambuf
  22
  23 #include <streambuf>
  24 #include <cstring>
  25 #include <testsuite_hooks.h>
  26
  27 class testbuf : public std::streambuf
  28 {
  29 public:
  30
  31   // Typedefs:
  32   typedef std::streambuf::traits_type traits_type;
  33   typedef std::streambuf::char_type char_type;
  34
  35   testbuf(): std::streambuf()
  36   { }
  37
  38   bool
  39   check_pointers()
  40   {
  41     bool test __attribute__((unused)) = true;
  42     VERIFY( !this->eback() );
  43     VERIFY( !this->gptr() );
  44     VERIFY( !this->egptr() );
  45     VERIFY( !this->pbase() );
  46     VERIFY( !this->pptr() );
  47     VERIFY( !this->epptr() );
  48     return test;
  49   }
  50
  51   int_type
  52   pub_uflow()
  53   { return (this->uflow()); }
  54
  55   int_type
  56   pub_overflow(int_type __c = traits_type::eof())
  57   { return (this->overflow(__c)); }
  58
  59   int_type
  60   pub_pbackfail(int_type __c)
  61   { return (this->pbackfail(__c)); }
  62
  63   void
  64   pub_setg(char* beg, char* cur, char *end)
  65   { this->setg(beg, cur, end); }
  66
  67   void
  68   pub_setp(char* beg, char* end)
  69   { this->setp(beg, end); }
  70
  71 protected:
  72   int_type
  73   underflow()
  74   {
  75     int_type __retval = traits_type::eof();
  76     if (this->gptr() < this->egptr())
  77       __retval = traits_type::not_eof(0);
  78     return __retval;
  79   }
  80 };
  81
  82 void test01()
  83 {
  84   typedef testbuf::traits_type traits_type;
  85   typedef testbuf::int_type int_type;
  86
  87   bool test __attribute__((unused)) = true;
  88   char lit01[52];
  89   std::strcpy(lit01, "chicago underground trio/possible cube on delmark");
  90   testbuf buf01;
  91
  92   // pbackfail
  93   int i01 = 3;
  94   buf01.pub_setg(lit01, lit01, (lit01 + i01));
  95   VERIFY( i01 == buf01.in_avail() );
  96   int_type intt01 = traits_type::to_int_type('b');
  97   VERIFY( traits_type::eof() == buf01.pub_pbackfail(intt01) );
  98
  99   // overflow
 100   VERIFY( traits_type::eof() == buf01.pub_overflow(intt01) );
 101   VERIFY( traits_type::eof() == buf01.pub_overflow() );
 102   VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[0]) );
 103 }
 104
 105 int main()
 106 {
 107   test01();
 108   return 0;
 109 }