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

   1 // 1999-10-11 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 // 27.5.2 template class basic_streambuf
  32
  33 #include <streambuf>
  34 #include <cstring>
  35 #include <testsuite_hooks.h>
  36
  37 class testbuf : public std::streambuf
  38 {
  39 public:
  40
  41   // Typedefs:
  42   typedef std::streambuf::traits_type traits_type;
  43   typedef std::streambuf::char_type char_type;
  44
  45   testbuf(): std::streambuf()
  46   { }
  47
  48   bool
  49   check_pointers()
  50   {
  51     bool test __attribute__((unused)) = true;
  52     VERIFY( this->eback() == NULL );
  53     VERIFY( this->gptr() == NULL );
  54     VERIFY( this->egptr() == NULL );
  55     VERIFY( this->pbase() == NULL );
  56     VERIFY( this->pptr() == NULL );
  57     VERIFY( this->epptr() == NULL );
  58     return test;
  59   }
  60
  61   int_type
  62   pub_uflow()
  63   { return (this->uflow()); }
  64
  65   int_type
  66   pub_overflow(int_type __c = traits_type::eof())
  67   { return (this->overflow(__c)); }
  68
  69   int_type
  70   pub_pbackfail(int_type __c)
  71   { return (this->pbackfail(__c)); }
  72
  73   void
  74   pub_setg(char* beg, char* cur, char *end)
  75   { this->setg(beg, cur, end); }
  76
  77   void
  78   pub_setp(char* beg, char* end)
  79   { this->setp(beg, end); }
  80
  81 protected:
  82   int_type
  83   underflow()
  84   {
  85     int_type __retval = traits_type::eof();
  86     if (this->gptr() < this->egptr())
  87       __retval = traits_type::not_eof(0);
  88     return __retval;
  89   }
  90 };
  91
  92 void test01()
  93 {
  94   typedef testbuf::traits_type traits_type;
  95   typedef testbuf::int_type int_type;
  96
  97   bool test __attribute__((unused)) = true;
  98   char lit01[52];
  99   std::strcpy(lit01, "chicago underground trio/possible cube on delmark");
 100   testbuf buf01;
 101
 102   // 27.5.2.3.1 get area
 103   // 27.5.2.2.3 get area
 104   // 27.5.2.4.3 get area
 105   int i01 = 3;
 106   buf01.pub_setg(lit01, lit01, (lit01 + i01));
 107   VERIFY( i01 == buf01.in_avail() );
 108
 109   VERIFY( buf01.pub_uflow() == lit01[0] );
 110   VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[1]) );
 111   VERIFY( buf01.pub_uflow() == lit01[1] );
 112   VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[2]) );
 113   VERIFY( buf01.pub_uflow() == lit01[2] );
 114   VERIFY( buf01.sgetc() == traits_type::eof() );
 115 }
 116
 117 int main()
 118 {
 119   test01();
 120   return 0;
 121 }