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) 1997-2019 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 3, 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 COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <sstream>
  21 #include <testsuite_hooks.h>
  22
  23 std::string str_01("mykonos. . . or what?");
  24 std::string str_02("paris, or sainte-maxime?");
  25 std::string str_03;
  26 std::stringbuf strb_01(str_01);
  27 std::stringbuf strb_02(str_02, std::ios_base::in);
  28 std::stringbuf strb_03(str_03, std::ios_base::out);
  29
  30 // test overloaded virtual functions
  31 void test04()
  32 {
  33   std::streamsize               strmsz_1, strmsz_2;
  34   typedef std::stringbuf::int_type int_type;
  35   typedef std::stringbuf::traits_type traits_type;
  36
  37   // GET
  38   strb_01.in_avail();
  39   strb_02.in_avail();
  40   strb_03.in_avail();
  41
  42   int_type c1 = strb_01.sbumpc();
  43   int_type c2 = strb_02.sbumpc();
  44   strb_01.sbumpc();
  45   int_type c4 = strb_02.sbumpc();
  46   strb_03.sbumpc();
  47
  48   // int_type sgetc()
  49   // if read_cur not avail, return uflow(), else return *read_cur
  50   int_type c6 = strb_01.sgetc();
  51   int_type c7 = strb_02.sgetc();
  52   strb_01.sgetc();
  53   strb_02.sgetc();
  54   strb_03.sgetc();
  55
  56   // int_type snextc()
  57   // calls sbumpc and if sbumpc != eof, return sgetc
  58   c6 = strb_01.snextc();
  59   c7 = strb_02.snextc();
  60   strb_03.snextc();
  61
  62   // streamsize sgetn(char_type *s, streamsize n)
  63   // streamsize xsgetn(char_type *s, streamsize n)
  64   // assign up to n chars to s from input sequence, indexing in_cur as
  65   // approp and returning the number of chars assigned
  66   strmsz_1 = strb_01.in_avail();
  67   strmsz_2 = strb_02.in_avail();
  68   VERIFY( strmsz_1 != strmsz_2 );
  69   VERIFY( strmsz_1 != static_cast<std::streamsize>(str_01.length()) );
  70   // because now we've moved into string
  71   VERIFY( strmsz_2 != static_cast<std::streamsize>(str_02.length()) );
  72   char carray1[11] = "";
  73   strmsz_1 = strb_01.sgetn(carray1, 10);
  74   char carray2[20] = "";
  75   strmsz_2 = strb_02.sgetn(carray2, 10);
  76   VERIFY( strmsz_1 == strmsz_2 );
  77   VERIFY( strmsz_1 == 10 );
  78   c1 = strb_01.sgetc();
  79   c2 = strb_02.sgetc();
  80   VERIFY( c6 == c1 ); //just by co-incidence both o's
  81   VERIFY( c7 != c2 ); // n != i
  82   VERIFY( c1 == traits_type::to_int_type(str_01[13]) );
  83   VERIFY( c2 == traits_type::to_int_type(str_02[13]) ); //should equal fourteenth letter at this point
  84   strmsz_1 = strb_03.sgetn(carray1, 10);
  85   VERIFY( !strmsz_1 ); //zero
  86   strmsz_1 = strb_02.in_avail();
  87   strmsz_2 = strb_02.sgetn(carray2, strmsz_1 + 5);
  88   VERIFY( strmsz_1 == strmsz_2 ); //write off the end
  89   c4 = strb_02.sgetc(); // should be EOF
  90   VERIFY( c4 == traits_type::eof() );
  91 }
  92
  93 int main()
  94 {
  95   test04();
  96   return 0;
  97 }
  98
  99
 100
 101 // more candy!!!