libstdc++-v3/testsuite/27_io/basic_stringbuf/overflow/char/1.cc

   1 // 2004-07-07  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2004-2023 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 // 27.7.1.3 basic_stringbuf overridden virtual functions.
  21
  22 #include <sstream>
  23 #include <cstdlib>
  24 #include <testsuite_hooks.h>
  25
  26 using namespace std;
  27
  28 string
  29 data(unsigned len)
  30 {
  31   string ret;
  32   for (unsigned i = 0; i < len; ++i)
  33     ret.push_back('a' + rand() % 26);
  34   return ret;
  35 }
  36
  37 void
  38 test01(unsigned iter)
  39 {
  40   for (unsigned n = 1; n <= iter; n *= 10)
  41     {
  42       const string str = data(n);
  43       stringbuf sstr;
  44       for (unsigned i = 0; i < n; ++i)
  45         sstr.sputc(str[i]);
  46       VERIFY( str == sstr.str() );
  47     }
  48 }
  49
  50 // This can take long on simulators, timing out the test.
  51 // { dg-options "-DITERATIONS=10000" { target simulator } }
  52 #ifndef ITERATIONS
  53 #define ITERATIONS 10000000
  54 #endif
  55
  56 int main()
  57 {
  58   test01(ITERATIONS);
  59   return 0;
  60 }