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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
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// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
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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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// The ARM simulator does not provide support for "fstat", which
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// causes "in_avail" to return an incorrect value.
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// { dg-do run { xfail arm*-*-elf arm*-*-eabi } }
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// 27.8.1.4 Overridden virtual functions
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#include <fstream>
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#include <testsuite_hooks.h>
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#include <testsuite_io.h>
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// @require@ %-*.tst %-*.txt
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// @diff@ %-*.tst %*.txt
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const char name_01[] = "sgetn.txt"; // file with data in it
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const char name_03[] = "tmp_sgetn_1io.tst"; // empty file, need to create
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// Test overloaded virtual functions.
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void test05()
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{
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using namespace std;
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using namespace __gnu_test;
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typedef filebuf::int_type int_type;
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typedef filebuf::traits_type traits_type;
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bool test __attribute__((unused)) = true;
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streamsize strmsz_1, strmsz_2;
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char carray1[13] = "";
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char carray2[8192] = "";
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char buffer[8192] = "";
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int_type c1, c4;
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// streamsize sgetn(char_type *s, streamsize n)
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// streamsize xsgetn(char_type *s, streamsize n)
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// assign up to n chars to s from input sequence, indexing in_cur as
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// approp and returning the number of chars assigned
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// in | out 1
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{
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constraint_filebuf fb_03;
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fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc);
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VERIFY( !fb_03.write_position() );
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VERIFY( !fb_03.read_position() );
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strmsz_1 = fb_03.sgetn(carray1, 10);
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VERIFY( strmsz_1 == 0 );
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VERIFY( !fb_03.write_position() );
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VERIFY( !fb_03.read_position() );
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}
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// in | out 2
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{
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constraint_filebuf fb_01;
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// Need this since BUFSIZ is only guaranteed >= 255 and we want
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// to trigger the same underflow situation everywhere.
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fb_01.pubsetbuf(buffer, 8192);
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fb_01.open(name_01, ios_base::in | ios_base::out);
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VERIFY( !fb_01.write_position() );
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strmsz_1 = fb_01.in_avail();
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strmsz_2 = fb_01.sgetn(carray1, 10);
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VERIFY( strmsz_2 == 10 );
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strmsz_2 = fb_01.in_avail();
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VERIFY( strmsz_1 > strmsz_2 );
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c1 = fb_01.sgetc();
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VERIFY( c1 == 'b' );
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strmsz_1 = fb_01.in_avail();
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strmsz_2 = fb_01.sgetn(carray2, strmsz_1 + 5);
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VERIFY( strmsz_1 == strmsz_2 - 5 );
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c4 = fb_01.sgetc(); // buffer should have underflowed from above.
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VERIFY( c4 == 'h' );
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strmsz_1 = fb_01.in_avail();
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VERIFY( strmsz_1 > 0 );
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strmsz_2 = fb_01.sgetn(carray2, strmsz_1 + 5);
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VERIFY( strmsz_1 == strmsz_2 ); //at the end of the actual file
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VERIFY( !fb_01.write_position() );
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VERIFY( !fb_01.read_position() );
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}
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}
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int main()
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{
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test05();
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return 0;
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}
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