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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
// Copyright (C) 2001-2015 Free Software Foundation, Inc.
//
// 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 3, 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 COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// The ARM simulator does not provide support for "fstat", which
// causes "in_avail" to return an incorrect value.
// { dg-do run { xfail arm*-*-elf arm*-*-eabi } }
// 27.8.1.4 Overridden virtual functions
// { dg-require-fileio "" }
// { dg-require-binary-io "" }
#include <fstream>
#include <testsuite_hooks.h>
#include <testsuite_io.h>
// @require@ %-*.tst %-*.txt
// @diff@ %-*.tst %*.txt
const char name_01[] = "sgetn.txt"; // file with data in it
// Test overloaded virtual functions.
void test05()
{
using namespace std;
using namespace __gnu_test;
typedef filebuf::int_type int_type;
typedef filebuf::traits_type traits_type;
bool test __attribute__((unused)) = true;
streamsize strmsz_1, strmsz_2;
char carray1[13] = "";
char carray2[8192] = "";
int_type c1, c4;
// streamsize sgetn(char_type *s, streamsize n)
// streamsize xsgetn(char_type *s, streamsize n)
// assign up to n chars to s from input sequence, indexing in_cur as
// approp and returning the number of chars assigned
// in
{
constraint_filebuf fb_01;
fb_01.pubsetbuf(0, 0);
fb_01.open(name_01, ios_base::in);
VERIFY( fb_01.unbuffered() );
strmsz_1 = fb_01.in_avail();
strmsz_2 = fb_01.sgetn(carray1, 10);
VERIFY( strmsz_2 == 10 );
strmsz_2 = fb_01.in_avail();
VERIFY( strmsz_1 > strmsz_2 );
c1 = fb_01.sgetc();
VERIFY( c1 == 'b' );
strmsz_1 = fb_01.in_avail(); // 8181 or 8250 depending on buffer
strmsz_2 = fb_01.sgetn(carray2, 8181 + 5);
VERIFY( 8181 == strmsz_2 - 5 );
c4 = fb_01.sgetc(); // buffer should have underflowed from above.
VERIFY( c4 == 'e' );
strmsz_1 = fb_01.in_avail();
VERIFY( strmsz_1 > 0 );
strmsz_2 = fb_01.sgetn(carray2, 65 + 5);
VERIFY( 70 == strmsz_2 ); // at the end of the actual file
VERIFY( fb_01.unbuffered() );
}
}
int main()
{
test05();
return 0;
}
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