libstdc++-v3/testsuite/27_io/basic_stringbuf/sgetn/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 __attribute__((unused)) = 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   // GET
  46   strmof_1 = strb_01.in_avail();
  47   strmof_2 = strb_02.in_avail();
  48   strmof_1 = strb_03.in_avail();
  49
  50   int_type c1 = strb_01.sbumpc();
  51   int_type c2 = strb_02.sbumpc();
  52   strb_01.sbumpc();
  53   int_type c4 = strb_02.sbumpc();
  54   int_type c5 = strb_03.sbumpc();
  55
  56   // int_type sgetc()
  57   // if read_cur not avail, return uflow(), else return *read_cur
  58   int_type c6 = strb_01.sgetc();
  59   int_type c7 = strb_02.sgetc();
  60   strb_01.sgetc();
  61   strb_02.sgetc();
  62    c5 = strb_03.sgetc();
  63
  64   // int_type snextc()
  65   // calls sbumpc and if sbumpc != eof, return sgetc
  66   c6 = strb_01.snextc();
  67   c7 = strb_02.snextc();
  68   c5 = strb_03.snextc();
  69
  70   // streamsize sgetn(char_type *s, streamsize n)
  71   // streamsize xsgetn(char_type *s, streamsize n)
  72   // assign up to n chars to s from input sequence, indexing in_cur as
  73   // approp and returning the number of chars assigned
  74   strmsz_1 = strb_01.in_avail();
  75   strmsz_2 = strb_02.in_avail();
  76   test = strmsz_1 != strmsz_2;
  77   VERIFY( strmsz_1 != static_cast<std::streamsize>(str_01.length()) );
  78   // because now we've moved into string
  79   VERIFY( strmsz_2 != static_cast<std::streamsize>(str_02.length()) );
  80   char carray1[11] = "";
  81   strmsz_1 = strb_01.sgetn(carray1, 10);
  82   char carray2[20] = "";
  83   strmsz_2 = strb_02.sgetn(carray2, 10);
  84   VERIFY( strmsz_1 == strmsz_2 );
  85   VERIFY( strmsz_1 == 10 );
  86   c1 = strb_01.sgetc();
  87   c2 = strb_02.sgetc();
  88   VERIFY( c6 == c1 ); //just by co-incidence both o's
  89   VERIFY( c7 != c2 ); // n != i
  90   VERIFY( c1 == str_01[13] );
  91   VERIFY( c2 == str_02[13] ); //should equal fourteenth letter at this point
  92   strmsz_1 = strb_03.sgetn(carray1, 10);
  93   VERIFY( !strmsz_1 ); //zero
  94   strmsz_1 = strb_02.in_avail();
  95   strmsz_2 = strb_02.sgetn(carray2, strmsz_1 + 5);
  96   VERIFY( strmsz_1 == strmsz_2 ); //write off the end
  97   c4 = strb_02.sgetc(); // should be EOF
  98   VERIFY( c4 == traits_type::eof() );
  99 }
 100
 101 int main()
 102 {
 103   test04();
 104   return 0;
 105 }
 106
 107
 108
 109 // more candy!!!