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// The ARM simulator does not provide support for "fstat", which 21// causes "in_avail" to return an incorrect value. 22// { dg-do run { xfail arm*-*-elf arm*-*-eabi } } 23 24// 27.8.1.4 Overridden virtual functions 25 26// { dg-require-fileio "" } 27// { dg-require-binary-io "" } 28 29#include <fstream> 30#include <testsuite_hooks.h> 31#include <testsuite_io.h> 32 33// @require@ %-*.tst %-*.txt 34// @diff@ %-*.tst %*.txt 35 36const char name_01[] = "sgetn.txt"; // file with data in it 37const char name_03[] = "tmp_sgetn_2io.tst"; // empty file, need to create 38 39// Test overloaded virtual functions. 40void test05() 41{ 42 using namespace std; 43 using namespace __gnu_test; 44 typedef filebuf::int_type int_type; 45 typedef filebuf::traits_type traits_type; 46 47 bool test __attribute__((unused)) = true; 48 49 streamsize strmsz_1, strmsz_2; 50 char carray1[13] = ""; 51 char carray2[8192] = ""; 52 int_type c1, c4; 53 54 // streamsize sgetn(char_type *s, streamsize n) 55 // streamsize xsgetn(char_type *s, streamsize n) 56 // assign up to n chars to s from input sequence, indexing in_cur as 57 // approp and returning the number of chars assigned 58 59 // in | out 1 60 { 61 constraint_filebuf fb_03; 62 fb_03.pubsetbuf(0, 0); 63 fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc); 64 VERIFY( fb_03.unbuffered() ); 65 strmsz_1 = fb_03.sgetn(carray1, 10); 66 VERIFY( strmsz_1 == 0 ); 67 VERIFY( fb_03.unbuffered() ); 68 } 69 70 // in | out 2 71 { 72 constraint_filebuf fb_01; 73 fb_01.pubsetbuf(0, 0); 74 fb_01.open(name_01, ios_base::in | ios_base::out); 75 VERIFY( fb_01.unbuffered() ); 76 strmsz_1 = fb_01.in_avail(); 77 strmsz_2 = fb_01.sgetn(carray1, 10); 78 VERIFY( strmsz_2 == 10 ); 79 strmsz_2 = fb_01.in_avail(); 80 VERIFY( strmsz_1 > strmsz_2 ); 81 c1 = fb_01.sgetc(); 82 VERIFY( c1 == 'b' ); 83 strmsz_1 = fb_01.in_avail(); 84 strmsz_2 = fb_01.sgetn(carray2, 8181 + 5); 85 VERIFY( 8181 == strmsz_2 - 5 ); 86 c4 = fb_01.sgetc(); // buffer should have underflowed from above. 87 VERIFY( c4 == 'e' ); 88 strmsz_1 = fb_01.in_avail(); 89 VERIFY( strmsz_1 > 0 ); 90 strmsz_2 = fb_01.sgetn(carray2, 65 + 5); 91 VERIFY( 70 == strmsz_2 ); //at the end of the actual file 92 VERIFY( fb_01.unbuffered() ); 93 } 94} 95 96int main() 97{ 98 test05(); 99 return 0; 100} 101