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 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // 27.5.2 template class basic_streambuf
  31
  32 #include <streambuf>
  33 #include <testsuite_hooks.h>
  34
  35 class testbuf : public std::streambuf
  36 {
  37 public:
  38
  39   // Typedefs:
  40   typedef std::streambuf::traits_type traits_type;
  41   typedef std::streambuf::char_type char_type;
  42
  43   testbuf(): std::streambuf()
  44   { }
  45
  46   bool
  47   check_pointers()
  48   {
  49     bool test __attribute__((unused)) = true;
  50     VERIFY( this->eback() == NULL );
  51     VERIFY( this->gptr() == NULL );
  52     VERIFY( this->egptr() == NULL );
  53     VERIFY( this->pbase() == NULL );
  54     VERIFY( this->pptr() == NULL );
  55     VERIFY( this->epptr() == NULL );
  56     return test;
  57   }
  58
  59   int_type
  60   pub_uflow()
  61   { return (this->uflow()); }
  62
  63   int_type
  64   pub_overflow(int_type __c = traits_type::eof())
  65   { return (this->overflow(__c)); }
  66
  67   int_type
  68   pub_pbackfail(int_type __c)
  69   { return (this->pbackfail(__c)); }
  70
  71   void
  72   pub_setg(char* beg, char* cur, char *end)
  73   { this->setg(beg, cur, end); }
  74
  75   void
  76   pub_setp(char* beg, char* end)
  77   { this->setp(beg, end); }
  78
  79 protected:
  80   int_type
  81   underflow()
  82   {
  83     int_type __retval = traits_type::eof();
  84     if (this->gptr() < this->egptr())
  85       __retval = traits_type::not_eof(0);
  86     return __retval;
  87   }
  88 };
  89
  90 void test02()
  91 {
  92   typedef testbuf::traits_type traits_type;
  93   typedef testbuf::int_type int_type;
  94
  95   bool test __attribute__((unused)) = true;
  96
  97   const char* lit00 = "chicago underground trio/possible cube on delmark";
  98   size_t i01 = traits_type::length(lit00);
  99   char lit01[i01];
 100   strcpy(lit01, lit00);
 101
 102   testbuf buf01;
 103
 104   // 27.5.2.1 basic_streambuf ctors
 105   // default ctor initializes
 106   // - all pointer members to null pointers
 107   // - locale to current global locale
 108   VERIFY( buf01.check_pointers() );
 109   VERIFY( buf01.getloc() == std::locale() );
 110
 111   // 27.5.2.2.5 Put area
 112
 113   char carray01[i01];
 114   std::memset(carray01, 0, i01);
 115
 116   buf01.pub_setg(lit01, lit01, lit01 + i01);
 117   buf01.sgetn(carray01, 0);
 118   VERIFY( carray01[0] == 0 );
 119   buf01.sgetn(carray01, 1);
 120   VERIFY( carray01[0] == 'c' );
 121   buf01.sgetn(carray01 + 1, i01 - 1);
 122   VERIFY( carray01[0] == 'c' );
 123   VERIFY( carray01[1] == 'h' );
 124   VERIFY( carray01[i01 - 1] == 'k' );
 125 }
 126
 127 int main()
 128 {
 129   test02();
 130   return 0;
 131 }