libstdc++-v3/testsuite/ext/stdio_sync_filebuf/char/1.cc

   1 // 2003-05-01 Petur Runolfsson <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2019 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 // { dg-require-fileio "" }
  21
  22 #include <ext/stdio_sync_filebuf.h>
  23 #include <cstring>
  24 #include <testsuite_hooks.h>
  25
  26 void test01()
  27 {
  28   using namespace std;
  29
  30   const char* c_lit = "black pearl jasmine tea";
  31   unsigned size = strlen(c_lit);
  32   const char* name = "stdiobuf-1.txt";
  33
  34   FILE* fout = fopen(name, "w");
  35   VERIFY( fwrite(c_lit, 1, size, fout) == size );
  36   fclose(fout);
  37
  38   FILE* fin = fopen(name, "r");
  39   __gnu_cxx::stdio_sync_filebuf<char> sbuf(fin);
  40
  41   VERIFY( sbuf.sgetc() == c_lit[0] );
  42   VERIFY( getc(fin) == c_lit[0] );
  43   VERIFY( sbuf.sgetc() == c_lit[1] );
  44   VERIFY( sbuf.sbumpc() == c_lit[1] );
  45   VERIFY( ungetc('Z', fin) == 'Z' );
  46   VERIFY( sbuf.sbumpc() == 'Z' );
  47   VERIFY( getc(fin) == c_lit[2] );
  48   VERIFY( sbuf.sputbackc('X') == 'X' );
  49   VERIFY( getc(fin) == 'X' );
  50
  51   char buf[5];
  52   memset(buf, 'x', 5);
  53   VERIFY( sbuf.sgetn(buf, 5) == 5 );
  54   VERIFY( !memcmp(buf, c_lit + 3, 5) );
  55   VERIFY( getc(fin) == c_lit[8] );
  56
  57   fclose(fin);
  58 }
  59
  60 int main ()
  61 {
  62   test01();
  63   return 0;
  64 }