| // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
| |
| // Copyright (C) 2001, 2002, 2003, 2006 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 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // USA. |
| |
| // 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 |
| |
| #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; |
| } |