1// 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> 2 3// Copyright (C) 2001-2015 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 3, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING3. If not see 18// <http://www.gnu.org/licenses/>. 19 20// 27.8.1.4 Overridden virtual functions 21 22#include <fstream> 23#include <testsuite_hooks.h> 24#include <testsuite_io.h> 25 26// @require@ %-*.tst %-*.txt 27// @diff@ %-*.tst %*.txt 28 29const char name_02[] = "tmp_sgetn_1out.tst"; // empty file, need to create 30 31// Test overloaded virtual functions. 32void test05() 33{ 34 using namespace std; 35 using namespace __gnu_test; 36 typedef filebuf::int_type int_type; 37 typedef filebuf::traits_type traits_type; 38 39 bool test __attribute__((unused)) = true; 40 41 streamsize strmsz_1, strmsz_2; 42 char carray2[8192] = ""; 43 int_type c2, c4; 44 45 // streamsize sgetn(char_type *s, streamsize n) 46 // streamsize xsgetn(char_type *s, streamsize n) 47 // assign up to n chars to s from input sequence, indexing in_cur as 48 // approp and returning the number of chars assigned 49 50 // out 51 { 52 constraint_filebuf fb_02; 53 fb_02.open(name_02, ios_base::out | ios_base::trunc); 54 VERIFY( !fb_02.write_position() ); 55 VERIFY( !fb_02.read_position() ); 56 strmsz_2 = fb_02.in_avail(); 57 strmsz_2 = fb_02.sgetn(carray2, 10); 58 VERIFY( strmsz_2 == 0 ); 59 c2 = fb_02.sgetc(); 60 VERIFY( c2 == traits_type::eof() ); 61 strmsz_1 = fb_02.in_avail(); 62 strmsz_2 = fb_02.sgetn(carray2, strmsz_1 + 5); 63 VERIFY( strmsz_1 == -1 ); 64 VERIFY( strmsz_2 == 0 ); 65 c4 = fb_02.sgetc(); 66 VERIFY( c4 == traits_type::eof() ); 67 VERIFY( !fb_02.write_position() ); 68 VERIFY( !fb_02.read_position() ); 69 } 70} 71 72int main() 73{ 74 test05(); 75 return 0; 76} 77