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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libstdc++-v3/] [testsuite/] [27_io/] [basic_filebuf/] [sgetn/] [char/] [1-io.cc] - Rev 424
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// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> // Copyright (C) 2001, 2002, 2003, 2006, 2009 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 const char name_03[] = "tmp_sgetn_1io.tst"; // empty file, need to create // 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] = ""; char buffer[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 | out 1 { constraint_filebuf fb_03; fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc); VERIFY( !fb_03.write_position() ); VERIFY( !fb_03.read_position() ); strmsz_1 = fb_03.sgetn(carray1, 10); VERIFY( strmsz_1 == 0 ); VERIFY( !fb_03.write_position() ); VERIFY( !fb_03.read_position() ); } // in | out 2 { constraint_filebuf fb_01; // Need this since BUFSIZ is only guaranteed >= 255 and we want // to trigger the same underflow situation everywhere. fb_01.pubsetbuf(buffer, 8192); fb_01.open(name_01, ios_base::in | ios_base::out); VERIFY( !fb_01.write_position() ); 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(); strmsz_2 = fb_01.sgetn(carray2, strmsz_1 + 5); VERIFY( strmsz_1 == 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, strmsz_1 + 5); VERIFY( strmsz_1 == strmsz_2 ); //at the end of the actual file VERIFY( !fb_01.write_position() ); VERIFY( !fb_01.read_position() ); } } int main() { test05(); return 0; }