istream_unformatted.cc

俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）的全部源代码。

// 1999-08-11 bkoz

// Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// 27.6.1.3 unformatted input functions
// @require@ %-*.tst %-*.txt
// @diff@ %-*.tst %-*.txt

#include <cstring> // for strncmp,...
#include <istream>
#include <sstream>
#include <fstream>
#include <testsuite_hooks.h>

int
test01()
{
  typedef std::ios::traits_type traits_type;

  bool test = true;
  const std::string str_01;
  const std::string str_02("soul eyes: john coltrane quartet");
  std::string strtmp;

  std::stringbuf isbuf_03(str_02, std::ios_base::in);
  std::stringbuf isbuf_04(str_02, std::ios_base::in);

  std::istream is_00(NULL);
  std::istream is_03(&isbuf_03);
  std::istream is_04(&isbuf_04);
  std::ios_base::iostate state1, state2, statefail, stateeof;
  statefail = std::ios_base::failbit;
  stateeof = std::ios_base::eofbit;

  // istream& read(char_type* s, streamsize n)
  char carray[60] = "";
  state1 = is_04.rdstate();
  is_04.read(carray, 0);
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );

  state1 = is_04.rdstate();
  is_04.read(carray, 9);
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );
  VERIFY( !std::strncmp(carray, "soul eyes", 9) );
  VERIFY( is_04.peek() == ':' );

  state1 = is_03.rdstate();
  is_03.read(carray, 60);
  state2 = is_03.rdstate();
  VERIFY( state1 != state2 );
  VERIFY( static_cast<bool>(state2 & stateeof) ); 
  VERIFY( static_cast<bool>(state2 & statefail) ); 
  VERIFY( !std::strncmp(carray, "soul eyes: john coltrane quartet", 35) );


  // istream& ignore(streamsize n = 1, int_type delim = traits::eof())
  state1 = is_04.rdstate();
  is_04.ignore();
  VERIFY( is_04.gcount() == 1 );
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );
  VERIFY( is_04.peek() == ' ' );

  state1 = is_04.rdstate();
  is_04.ignore(0);
  VERIFY( is_04.gcount() == 0 );
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );
  VERIFY( is_04.peek() == ' ' );

  state1 = is_04.rdstate();
  is_04.ignore(5, traits_type::to_int_type(' '));
  VERIFY( is_04.gcount() == 1 );
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );
  VERIFY( is_04.peek() == 'j' );

  // int_type peek()
  state1 = is_04.rdstate();
  VERIFY( is_04.peek() == 'j' );
  VERIFY( is_04.gcount() == 0 );
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );

  is_04.ignore(30);
  state1 = is_04.rdstate();
  VERIFY( is_04.peek() == traits_type::eof() );
  VERIFY( is_04.gcount() == 0 );
  state2 = is_04.rdstate();
  VERIFY( state1 != state2 );


  // istream& putback(char c)
  is_04.clear();
  state1 = is_04.rdstate();
  is_04.putback('|');
  VERIFY( is_04.gcount() == 0 );
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );
  VERIFY( is_04.peek() == '|' );

  // istream& unget()
  is_04.clear();
  state1 = is_04.rdstate();
  is_04.unget();
  VERIFY( is_04.gcount() == 0 );
  state2 = is_04.rdstate();
  VERIFY( state1 == state2 );
  VERIFY( is_04.peek() == 'e' );
  
  // int sync()
  int i = is_00.sync();

#ifdef DEBUG_ASSERT
  assert(test);
#endif
 
  return 0;
}

int
test02()
{
  typedef std::char_traits<char>	traits_type;

  bool test = true;
  const char str_lit01[] = "\t\t\t    sun*ra \n"
  "                            "
  "and his myth science arkestra present\n"
  "                            "
  "angles and demons @ play\n"
  "                            "
  "the nubians of plutonia";
  std::string str01(str_lit01);
  std::string strtmp;

  std::stringbuf sbuf_04(str01, std::ios_base::in);

  std::istream is_00(NULL);
  std::istream is_04(&sbuf_04);
  std::ios_base::iostate state1, state2, statefail, stateeof;
  statefail = std::ios_base::failbit;
  stateeof = std::ios_base::eofbit;
  std::streamsize count1, count2;
  char carray1[400] = "";

  // istream& getline(char* s, streamsize n, char delim)
  // istream& getline(char* s, streamsize n)
  state1 = is_00.rdstate();
  is_00.getline(carray1, 20, '*');
  state2 = is_00.rdstate();
  // make sure failbit was set, since we couldn't extract
  // from the NULL streambuf...
  VERIFY( state1 != state2 );
  VERIFY( static_cast<bool>(state2 & statefail) );
  
  VERIFY( is_04.gcount() == 0 );
  state1 = is_04.rdstate();
  is_04.getline(carray1, 1, '\t'); // extracts, throws away
  state2 = is_04.rdstate();  
  VERIFY( is_04.gcount() == 1 );
  VERIFY( state1 == state2 );
  VERIFY( state1 == 0 );
  VERIFY( !traits_type::compare("", carray1, 1) );

  state1 = is_04.rdstate();
  is_04.getline(carray1, 20, '*');
  state2 = is_04.rdstate();  
  VERIFY( is_04.gcount() == 10 );
  VERIFY( state1 == state2 );
  VERIFY( state1 == 0 );
  VERIFY( !traits_type::compare("\t\t    sun", carray1, 10) );

  state1 = is_04.rdstate();
  is_04.getline(carray1, 20);
  state2 = is_04.rdstate();  
  VERIFY( is_04.gcount() == 4 );
  VERIFY( state1 == state2 );
  VERIFY( state1 == 0 );
  VERIFY( !traits_type::compare("ra ", carray1, 4) );

  state1 = is_04.rdstate();
  is_04.getline(carray1, 65);
  state2 = is_04.rdstate();  
  VERIFY( is_04.gcount() == 64 );
  VERIFY( state1 != state2 );
  VERIFY( state2 == statefail );
  VERIFY( !traits_type::compare(
  "                            and his myth science arkestra presen",
                               carray1, 65) );

  is_04.clear();
  state1 = is_04.rdstate();
  is_04.getline(carray1, 120, '|');
  state2 = is_04.rdstate();  
  VERIFY( is_04.gcount() == 106 );
  VERIFY( state1 != state2 );
  VERIFY( state2 == stateeof );

  is_04.clear();
  state1 = is_04.rdstate();
  is_04.getline(carray1, 100, '|');
  state2 = is_04.rdstate();  
  VERIFY( is_04.gcount() == 0 ); 
  VERIFY( state1 != state2 );
  VERIFY( static_cast<bool>(state2 & stateeof) );
  VERIFY( static_cast<bool>(state2 & statefail) );

#ifdef DEBUG_ASSERT
  assert(test);
#endif
 
  return 0;
}

int
test03()
{
  typedef std::char_traits<char>	traits_type;

  bool test = true;
  const char str_lit01[] = 
  "   sun*ra \n\t\t\t   & his arkestra, featuring john gilmore: \n"
  "                         "
    "jazz in silhouette: images and forecasts of tomorrow";

  std::string str01(str_lit01);
  std::string strtmp;

  std::stringbuf sbuf_03;
  std::stringbuf sbuf_04(str01, std::ios_base::in);
  std::stringbuf sbuf_05(str01, std::ios_base::in);

  std::istream is_00(NULL);
  std::istream is_04(&sbuf_04);
  std::istream is_05(&sbuf_05);
  std::ios_base::iostate state1, state2, statefail, stateeof;
  statefail = std::ios_base::failbit;
  stateeof = std::ios_base::eofbit;
  std::streamsize count1, count2;
  char carray1[400] = "";

  // int_type get()
  // istream& get(char*, streamsize, char delim)
  // istream& get(char*, streamsize)
  // istream& get(streambuf&, char delim)
  // istream& get(streambuf&)
  is_00.get(carray1, 2);
  VERIFY( static_cast<bool>(is_00.rdstate() & statefail) ); 
  VERIFY( is_00.gcount() == 0 );

  is_04.get(carray1, 4);
  VERIFY( !(is_04.rdstate() & statefail) );
  VERIFY( !traits_type::compare(carray1, "   ", 4) );
  VERIFY( is_04.gcount() == 3 );

  is_04.clear();
  is_04.get(carray1 + 3, 200);
  VERIFY( !(is_04.rdstate() & statefail) );
  VERIFY( !(is_04.rdstate() & stateeof) );
  VERIFY( !traits_type::compare(carray1, str_lit01, 10) );
  VERIFY( is_04.gcount() == 7 );

  is_04.clear();
  is_04.get(carray1, 200);
  VERIFY( !(is_04.rdstate() & stateeof) );
  VERIFY( static_cast<bool>(is_04.rdstate() & statefail) ); // delimiter
  VERIFY( is_04.gcount() == 0 );
  is_04.clear();
  is_04.get(carray1, 200, '[');
  VERIFY( static_cast<bool>(is_04.rdstate() & stateeof) );
  VERIFY( !(is_04.rdstate() & statefail) );
  VERIFY( is_04.gcount() == 125 );
  is_04.clear();  
  is_04.get(carray1, 200);
  VERIFY( static_cast<bool>(is_04.rdstate() & stateeof) );
  VERIFY( static_cast<bool>(is_04.rdstate() & statefail) ); 
  VERIFY( is_04.gcount() == 0 );

  std::stringbuf sbuf_02(std::ios_base::in);
  is_05.clear();
  is_05.get(sbuf_02);
  VERIFY( is_05.gcount() == 0 );
  VERIFY( static_cast<bool>(is_05.rdstate() & statefail) ); 
  VERIFY( !(is_05.rdstate() & stateeof) ); 

  is_05.clear();
  is_05.get(sbuf_03);
  VERIFY( is_05.gcount() == 10 );
  VERIFY( sbuf_03.str() == "   sun*ra " );
  VERIFY( !(is_05.rdstate() & statefail) ); 
  VERIFY( !(is_05.rdstate() & stateeof) ); 

  is_05.clear();
  is_05.get(sbuf_03, '|');
  VERIFY( is_05.gcount() == 125 );
  VERIFY( sbuf_03.str() == str_lit01 );
  VERIFY( !(is_05.rdstate() & statefail) ); 
  VERIFY( static_cast<bool>(is_05.rdstate() & stateeof) ); 

  is_05.clear();
  is_05.get(sbuf_03, '|');