libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/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;
  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
  54   // BUFFER MANAGEMENT & POSITIONING
  55
  56   // seekoff
  57   // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
  58   // alters the stream position to off
  59   pos_type pt_1(off_type(-1));
  60   pos_type pt_2(off_type(0));
  61   off_type off_1 = 0;
  62   off_type off_2 = 0;
  63   strb_01.str(str_01); //in|out ("mykonos. . . or what?");
  64   strb_02.str(str_02); //in ("paris, or sainte-maxime?");
  65   strb_03.str(str_03); //out ("")
  66   //IN|OUT
  67   //beg
  68   pt_1 = strb_01.pubseekoff(2, std::ios_base::beg);
  69   off_1 = pt_1;
  70   VERIFY( off_1 >= 0 );
  71   c1 = strb_01.snextc(); //current in pointer +1
  72   VERIFY( c1 == 'o' );
  73   c2 = strb_01.sputc('x');  //test current out pointer
  74   str_tmp = std::string("myxonos. . . or what?");
  75   VERIFY( strb_01.str() == str_tmp );
  76   //cur
  77   pt_1 = strb_01.pubseekoff(2, std::ios_base::cur);
  78   off_1 = pt_1;
  79   VERIFY( off_1 == -1 ); // can't seekoff for in and out + cur in sstreams
  80   pt_1 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
  81   off_1 = pt_1;
  82   pt_2 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
  83   off_2 = pt_2;
  84   VERIFY( off_2 == off_1 + 2 );
  85   c1 = strb_01.snextc(); //current in pointer + 1
  86   VERIFY( c1 == ' ' );
  87   c2 = strb_01.sputc('x');  //test current out pointer
  88   str_tmp = std::string("myxxnos. . . or what?");
  89   VERIFY( strb_01.str() == str_tmp );
  90   //end
  91   pt_2 = strb_01.pubseekoff(2, std::ios_base::end);
  92   off_1 = pt_2;
  93   VERIFY( off_1 == -1 ); // not a valid position
  94   VERIFY( strb_01.str() == str_tmp );
  95   // end part two (from the filebuf tests)
  96   strb_01.pubseekoff(0, std::ios_base::end);
  97   strmsz_1 = strb_01.in_avail(); // 0 cuz at the end
  98   c1 = strb_01.sgetc();
  99   c2 = strb_01.sungetc();
 100   strmsz_2 = strb_01.in_avail(); // 1
 101   c3 = strb_01.sgetc();
 102   VERIFY( c1 != c2 );
 103   VERIFY( strmsz_2 != strmsz_1 );
 104   VERIFY( strmsz_2 == 1 );
 105   // end part three
 106   strmsz_1 = strb_01.str().size();
 107   strmsz_2 = strb_01.sputn(" ravi shankar meets carlos santana in LoHa", 90);
 108   strb_01.pubseekoff(0, std::ios_base::end);
 109   strb_01.sputc('<');
 110   str_tmp = strb_01.str();
 111   VERIFY( str_tmp.size() == strmsz_1 + strmsz_2 + 1 );
 112   // IN
 113   // OUT
 114 }
 115
 116 int main()
 117 {
 118   test04();
 119   return 0;
 120 }
 121
 122
 123
 124 // more candy!!!