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

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   4 // 2007, 2009, 2010
   5 // Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22
  23 // 27.5.2 template class basic_streambuf
  24
  25 #include <streambuf>
  26 #include <cstring>
  27 #include <testsuite_hooks.h>
  28
  29 class testbuf : public std::streambuf
  30 {
  31 public:
  32
  33   // Typedefs:
  34   typedef std::streambuf::traits_type traits_type;
  35   typedef std::streambuf::char_type char_type;
  36
  37   testbuf(): std::streambuf()
  38   { }
  39
  40   bool
  41   check_pointers()
  42   {
  43     bool test __attribute__((unused)) = true;
  44     VERIFY( !this->eback() );
  45     VERIFY( !this->gptr() );
  46     VERIFY( !this->egptr() );
  47     VERIFY( !this->pbase() );
  48     VERIFY( !this->pptr() );
  49     VERIFY( !this->epptr() );
  50     return test;
  51   }
  52
  53   int_type
  54   pub_uflow()
  55   { return (this->uflow()); }
  56
  57   int_type
  58   pub_overflow(int_type __c = traits_type::eof())
  59   { return (this->overflow(__c)); }
  60
  61   int_type
  62   pub_pbackfail(int_type __c)
  63   { return (this->pbackfail(__c)); }
  64
  65   void
  66   pub_setg(char* beg, char* cur, char *end)
  67   { this->setg(beg, cur, end); }
  68
  69   void
  70   pub_setp(char* beg, char* end)
  71   { this->setp(beg, end); }
  72
  73 protected:
  74   int_type
  75   underflow()
  76   {
  77     int_type __retval = traits_type::eof();
  78     if (this->gptr() < this->egptr())
  79       __retval = traits_type::not_eof(0);
  80     return __retval;
  81   }
  82 };
  83
  84 void test02()
  85 {
  86   typedef testbuf::traits_type traits_type;
  87   typedef testbuf::int_type int_type;
  88
  89   bool test __attribute__((unused)) = true;
  90
  91   char lit01[] = "chicago underground trio/possible cube on delmark";
  92   size_t i01 = traits_type::length(lit01);
  93
  94   testbuf buf01;
  95
  96   // 27.5.2.1 basic_streambuf ctors
  97   // default ctor initializes
  98   // - all pointer members to null pointers
  99   // - locale to current global locale
 100   VERIFY( buf01.check_pointers() );
 101   VERIFY( buf01.getloc() == std::locale() );
 102
 103   // 27.5.2.2.5 Put area
 104
 105   char carray01[i01];
 106   std::memset(carray01, 0, i01);
 107
 108   buf01.pub_setg(lit01, lit01, lit01 + i01);
 109   buf01.sgetn(carray01, 0);
 110   VERIFY( carray01[0] == 0 );
 111   buf01.sgetn(carray01, 1);
 112   VERIFY( carray01[0] == 'c' );
 113   buf01.sgetn(carray01 + 1, i01 - 1);
 114   VERIFY( carray01[0] == 'c' );
 115   VERIFY( carray01[1] == 'h' );
 116   VERIFY( carray01[i01 - 1] == 'k' );
 117 }
 118
 119 int main()
 120 {
 121   test02();
 122   return 0;
 123 }