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298 lines
7.6 KiB
C++
298 lines
7.6 KiB
C++
// 2000-06-29 bkoz
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// Copyright (C) 2000 Free Software Foundation
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// 27.6.1.3 unformatted input functions
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// NB: ostream has a particular "seeks" category. Adopt this for istreams too.
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#include <istream>
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#include <sstream>
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#include <fstream>
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#include <debug_assert.h>
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bool test01()
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{
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using namespace std;
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typedef ios::pos_type pos_type;
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bool test = true;
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const char str_lit01[] = "testsuite/istream_unformatted-1.tst";
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// in
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// test default ctors leave things in the same positions...
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istringstream ist1;
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pos_type p3 = ist1.tellg();
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ifstream ifs1;
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pos_type p4 = ifs1.tellg();
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VERIFY( p3 == p4 );
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// in
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// test ctors leave things in the same positions...
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istringstream ist2("bob_marley:kaya");
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p3 = ist2.tellg();
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ifstream ifs2(str_lit01);
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p4 = ifs2.tellg();
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VERIFY( p3 == p4 );
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#ifdef DEBUG_ASSERT
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assert(test);
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#endif
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return test;
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}
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// fstreams
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void test04(void)
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{
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bool test = true;
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std::istream::pos_type pos01, pos02, pos03, pos04, pos05, pos06;
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std::ios_base::iostate state01, state02;
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const char str_lit01[] = "testsuite/istream_unformatted-1.txt";
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const char str_lit02[] = "testsuite/istream_unformatted-2.txt";
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std::ifstream if01(str_lit01, std::ios_base::in | std::ios_base::out);
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std::ifstream if02(str_lit01, std::ios_base::in);
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std::ifstream if03(str_lit02, std::ios_base::out | std::ios_base::trunc);
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VERIFY( if01.good() );
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VERIFY( if02.good() );
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VERIFY( if03.good() );
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std::istream is01(if01.rdbuf());
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std::istream is02(if02.rdbuf());
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std::istream is03(if03.rdbuf());
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// pos_type tellg()
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// in | out
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pos01 = is01.tellg();
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pos02 = is01.tellg();
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VERIFY( pos01 == pos02 );
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// VERIFY( istream::pos_type(0) != pos01 ); //deprecated
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// in
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pos03 = is02.tellg();
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pos04 = is02.tellg();
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VERIFY( pos03 == pos04 );
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// VERIFY( istream::pos_type(0) != pos03 ); //deprecated
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// out
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pos05 = is03.tellg();
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pos06 = is03.tellg();
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VERIFY( pos05 == pos06 );
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// VERIFY( istream::pos_type(0) != pos01 ); //deprecated
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// istream& seekg(pos_type)
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// istream& seekg(off_type, ios_base::seekdir)
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// cur
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// NB: see library issues list 136. It's the v-3 interp that seekg
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// only sets the input buffer, or else istreams with buffers that
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// have _M_mode == ios_base::out will fail to have consistency
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// between seekg and tellg.
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state01 = is01.rdstate();
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is01.seekg(10, std::ios_base::cur);
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state02 = is01.rdstate();
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pos01 = is01.tellg();
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VERIFY( pos01 == pos02 + 10 );
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VERIFY( state01 == state02 );
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pos02 = is01.tellg();
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VERIFY( pos02 == pos01 );
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state01 = is02.rdstate();
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is02.seekg(10, std::ios_base::cur);
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state02 = is02.rdstate();
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pos03 = is02.tellg();
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VERIFY( pos03 == pos04 + 10 );
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VERIFY( state01 == state02 );
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pos04 = is02.tellg();
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VERIFY( pos03 == pos04 );
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state01 = is03.rdstate();
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is03.seekg(10, std::ios_base::cur);
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state02 = is03.rdstate();
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pos05 = is03.tellg();
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VERIFY( pos05 == pos06 + 10 );
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VERIFY( state01 == state02 );
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pos06 = is03.tellg();
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VERIFY( pos05 == pos06 );
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// beg
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state01 = is01.rdstate();
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is01.seekg(20, std::ios_base::beg);
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state02 = is01.rdstate();
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pos01 = is01.tellg();
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VERIFY( pos01 == pos02 + 10 );
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VERIFY( state01 == state02 );
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pos02 = is01.tellg();
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VERIFY( pos02 == pos01 );
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state01 = is02.rdstate();
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is02.seekg(20, std::ios_base::beg);
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state02 = is02.rdstate();
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pos03 = is02.tellg();
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VERIFY( pos03 == pos04 + 10 );
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VERIFY( state01 == state02 );
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pos04 = is02.tellg();
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VERIFY( pos03 == pos04 );
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state01 = is03.rdstate();
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is03.seekg(20, std::ios_base::beg);
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state02 = is03.rdstate();
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pos05 = is03.tellg();
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VERIFY( pos05 == pos06 + 10 );
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VERIFY( state01 == state02 );
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pos06 = is03.tellg();
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VERIFY( pos05 == pos06 );
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#ifdef DEBUG_ASSERT
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assert(test);
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#endif
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}
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// stringstreams
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void test05(void)
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{
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bool test = true;
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std::istream::pos_type pos01, pos02, pos03, pos04, pos05, pos06;
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std::ios_base::iostate state01, state02;
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const char str_lit01[] = "testsuite/istream_unformatted-1.tst";
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std::ifstream if01(str_lit01);
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std::ifstream if02(str_lit01);
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std::ifstream if03(str_lit01);
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VERIFY( if01.good() );
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VERIFY( if02.good() );
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VERIFY( if03.good() );
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std::stringbuf strbuf01(std::ios_base::in | std::ios_base::out);
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if01 >> &strbuf01;
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// initialize stringbufs that are ios_base::out
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std::stringbuf strbuf03(strbuf01.str(), std::ios_base::out);
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// initialize stringbufs that are ios_base::in
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std::stringbuf strbuf02(strbuf01.str(), std::ios_base::in);
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std::istream is01(&strbuf01);
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std::istream is02(&strbuf02);
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std::istream is03(&strbuf03);
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// pos_type tellg()
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// in | out
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pos01 = is01.tellg();
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pos02 = is01.tellg();
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VERIFY( pos01 == pos02 );
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// VERIFY( istream::pos_type(0) != pos01 ); // deprecated
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// in
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pos03 = is02.tellg();
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pos04 = is02.tellg();
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VERIFY( pos03 == pos04 );
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// VERIFY( istream::pos_type(0) != pos03 ); // deprecated
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// out
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pos05 = is03.tellg();
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pos06 = is03.tellg();
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VERIFY( pos05 == pos06 );
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// VERIFY( istream::pos_type(0) != pos01 ); //deprecated
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// istream& seekg(pos_type)
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// istream& seekg(off_type, ios_base::seekdir)
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// cur
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// NB: see library issues list 136. It's the v-3 interp that seekg
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// only sets the input buffer, or else istreams with buffers that
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// have _M_mode == ios_base::out will fail to have consistency
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// between seekg and tellg.
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state01 = is01.rdstate();
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is01.seekg(10, std::ios_base::cur);
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state02 = is01.rdstate();
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pos01 = is01.tellg();
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VERIFY( pos01 == pos02 + 10 );
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VERIFY( state01 == state02 );
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pos02 = is01.tellg();
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VERIFY( pos02 == pos01 );
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state01 = is02.rdstate();
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is02.seekg(10, std::ios_base::cur);
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state02 = is02.rdstate();
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pos03 = is02.tellg();
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VERIFY( pos03 == pos04 + 10 );
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VERIFY( state01 == state02 );
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pos04 = is02.tellg();
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VERIFY( pos03 == pos04 );
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state01 = is03.rdstate();
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is03.seekg(10, std::ios_base::cur);
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state02 = is03.rdstate();
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pos05 = is03.tellg();
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VERIFY( pos05 == pos06 ); // as only out buffer
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VERIFY( state01 == state02 );
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pos06 = is03.tellg();
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VERIFY( pos05 == pos06 );
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// beg
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state01 = is01.rdstate();
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is01.seekg(20, std::ios_base::beg);
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state02 = is01.rdstate();
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pos01 = is01.tellg();
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VERIFY( pos01 == pos02 + 10 );
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VERIFY( state01 == state02 );
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pos02 = is01.tellg();
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VERIFY( pos02 == pos01 );
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state01 = is02.rdstate();
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is02.seekg(20, std::ios_base::beg);
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state02 = is02.rdstate();
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pos03 = is02.tellg();
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VERIFY( pos03 == pos04 + 10 );
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VERIFY( state01 == state02 );
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pos04 = is02.tellg();
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VERIFY( pos03 == pos04 );
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state01 = is03.rdstate();
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is03.seekg(20, std::ios_base::beg);
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state02 = is03.rdstate();
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pos05 = is03.tellg();
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VERIFY( pos05 == pos06 ); // as only out buffer
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VERIFY( state01 == state02 );
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pos06 = is03.tellg();
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VERIFY( pos05 == pos06 );
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#ifdef DEBUG_ASSERT
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assert(test);
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#endif
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}
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int main()
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{
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test01();
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test04();
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test05();
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return 0;
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}
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