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// 1999-08-11 bkoz
// Copyright (C) 1999-2016 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/>.
// 27.6.1.3 unformatted input functions
#include <cstring> // for strlen
#include <istream>
#include <sstream>
#include <testsuite_hooks.h>
// [patch] bits/istream.tcc - getline(char_type*,streamsize,char_type)
// http://gcc.gnu.org/ml/libstdc++/2000-07/msg00003.html
void
test05()
{
const char* charray = "\n"
"a\n"
"aa\n"
"aaa\n"
"aaaa\n"
"aaaaa\n"
"aaaaaa\n"
"aaaaaaa\n"
"aaaaaaaa\n"
"aaaaaaaaa\n"
"aaaaaaaaaa\n"
"aaaaaaaaaaa\n"
"aaaaaaaaaaaa\n"
"aaaaaaaaaaaaa\n"
"aaaaaaaaaaaaaa\n";
bool test __attribute__((unused)) = true;
const std::streamsize it = 5;
std::streamsize br = 0;
char tmp[it];
std::stringbuf sb(charray, std::ios_base::in);
std::istream ifs(&sb);
std::streamsize blen = std::strlen(charray);
VERIFY(!(!ifs));
while(ifs.getline(tmp, it) || ifs.gcount())
{
br += ifs.gcount();
if(ifs.eof())
{
// Just sanity checks to make sure we've extracted the same
// number of chars that were in the streambuf
VERIFY(br == blen);
// Also, we should only set the failbit if we could
// _extract_ no chars from the stream, i.e. the first read
// returned EOF.
VERIFY(ifs.fail() && ifs.gcount() == 0);
}
else if(ifs.fail())
{
// delimiter not read
//
// either
// -> extracted no characters
// or
// -> n - 1 characters are stored
ifs.clear(ifs.rdstate() & ~std::ios::failbit);
VERIFY((ifs.gcount() == 0) || (std::strlen(tmp) == it - 1));
VERIFY(!(!ifs));
continue;
}
else
{
// delimiter was read.
//
// -> strlen(__s) < n - 1
// -> delimiter was seen -> gcount() > strlen(__s)
VERIFY(ifs.gcount() == static_cast<std::streamsize>(std::strlen(tmp) + 1) );
continue;
}
}
}
int
main()
{
test05();
return 0;
}
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