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istream.tcc (ignore): Correctly deal with n == numeric_limits<streamsize>::max().

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2004-05-24  Paolo Carlini  <pcarlini@suse.de>

	* include/bits/istream.tcc (ignore): Correctly deal with
	n == numeric_limits<streamsize>::max().
	* testsuite/27_io/basic_istream/ignore/char/2.cc: New.

	* include/bits/istream.tcc (basic_istream<>::getline): Prefer
	'_M_gcount + 1 < __n' to '--__n; _M_gcount < __n', just in case
	__n == numeric_limits<>::min().

	* include/bits/istream.tcc: Minor tweaks.

	* testsuite/21_strings/basic_string/inserters_extractors/char/10.cc:
	Tighten.
	* testsuite/21_strings/basic_string/inserters_extractors/char/11.cc:
	Likewise.
	* testsuite/21_strings/basic_string/inserters_extractors/wchar_t/10.cc:
	Likewise.
	* testsuite/21_strings/basic_string/inserters_extractors/wchar_t/11.cc:
	Likewise.
	* testsuite/27_io/basic_istream/getline/char/5.cc: Likewise.

From-SVN: r82198
This commit is contained in:
Paolo Carlini 2004-05-24 09:40:56 +00:00 committed by Paolo Carlini
parent 76391e5a04
commit b1c5b5a09b
8 changed files with 150 additions and 24 deletions
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22
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,25 @@
2004-05-24 Paolo Carlini <pcarlini@suse.de>
* include/bits/istream.tcc (ignore): Correctly deal with
n == numeric_limits<streamsize>::max().
* testsuite/27_io/basic_istream/ignore/char/2.cc: New.
* include/bits/istream.tcc (basic_istream<>::getline): Prefer
'_M_gcount + 1 < __n' to '--__n; _M_gcount < __n', just in case
__n == numeric_limits<>::min().
* include/bits/istream.tcc: Minor tweaks.
* testsuite/21_strings/basic_string/inserters_extractors/char/10.cc:
Tighten.
* testsuite/21_strings/basic_string/inserters_extractors/char/11.cc:
Likewise.
* testsuite/21_strings/basic_string/inserters_extractors/wchar_t/10.cc:
Likewise.
* testsuite/21_strings/basic_string/inserters_extractors/wchar_t/11.cc:
Likewise.
* testsuite/27_io/basic_istream/getline/char/5.cc: Likewise.
2004-05-22 Benjamin Kosnik <bkoz@redhat.com>
PR libstdc++/12854

18
libstdc++-v3/include/bits/istream.tcc
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@ -519,8 +519,8 @@ namespace std
&& !traits_type::eq_int_type(__c, __idelim))
{
*__s++ = traits_type::to_char_type(__c);
__c = __sb->snextc();
++_M_gcount;
__c = __sb->snextc();
}
if (traits_type::eq_int_type(__c, __eof))
__err |= ios_base::eofbit;
@ -591,15 +591,14 @@ namespace std
const int_type __eof = traits_type::eof();
__streambuf_type* __sb = this->rdbuf();
int_type __c = __sb->sgetc();
--__n;
while (_M_gcount < __n
while (_M_gcount + 1 < __n
&& !traits_type::eq_int_type(__c, __eof)
&& !traits_type::eq_int_type(__c, __idelim))
{
streamsize __size = std::min(streamsize(__sb->egptr()
- __sb->gptr()),
__n - _M_gcount);
__n - _M_gcount - 1);
if (__size > 1)
{
const char_type* __p = traits_type::find(__sb->gptr(),
@ -616,8 +615,8 @@ namespace std
else
{
*__s++ = traits_type::to_char_type(__c);
__c = __sb->snextc();
++_M_gcount;
__c = __sb->snextc();
}
}
@ -625,8 +624,8 @@ namespace std
__err |= ios_base::eofbit;
else if (traits_type::eq_int_type(__c, __idelim))
{
__sb->sbumpc();
++_M_gcount;
__sb->sbumpc();
}
else
__err |= ios_base::failbit;
@ -658,7 +657,9 @@ namespace std
__streambuf_type* __sb = this->rdbuf();
int_type __c;
while (_M_gcount < __n
if (__n != numeric_limits<streamsize>::max())
--__n;
while (_M_gcount <= __n
&& !traits_type::eq_int_type(__c = __sb->sbumpc(), __eof))
{
++_M_gcount;
@ -1101,7 +1102,6 @@ namespace std
__size_type __extracted = 0;
const __size_type __n = __str.max_size();
bool __testdelim = false;
ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
typename __istream_type::sentry __cerb(__in, true);
if (__cerb)
@ -1136,8 +1136,8 @@ namespace std
__err |= ios_base::eofbit;
else if (_Traits::eq_int_type(__c, __idelim))
{
__sb->sbumpc();
++__extracted;
__sb->sbumpc();
}
else
__err |= ios_base::failbit;

10
libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/char/10.cc
View File

@ -38,20 +38,23 @@ string prepare(string::size_type len, unsigned nchunks, char delim)
return ret;
}
void check(istream& stream, const string& str, char delim)
void check(istream& stream, const string& str, unsigned nchunks, char delim)
{
bool test __attribute__((unused)) = true;
string chunk;
string::size_type index = 0, index_new = 0;
unsigned n = 0;
while (getline(stream, chunk, delim))
{
index_new = str.find(delim, index);
VERIFY( !str.compare(index, index_new - index, chunk) );
index = index_new + 1;
++n;
}
VERIFY( stream.eof() );
VERIFY( n == nchunks );
}
// istream& getline(istream&, string&, char)
@ -60,7 +63,8 @@ void test01()
const char filename[] = "inserters_extractors-2.txt";
const char delim = '|';
const string data = prepare(777, 10, delim);
const unsigned nchunks = 10;
const string data = prepare(777, nchunks, delim);
ofstream ofstrm;
ofstrm.open(filename);
@ -69,7 +73,7 @@ void test01()
ifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data, delim);
check(ifstrm, data, nchunks, delim);
ifstrm.close();
}

10
libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/char/11.cc
View File

@ -38,20 +38,23 @@ string prepare(string::size_type len, unsigned nchunks)
return ret;
}
void check(istream& stream, const string& str)
void check(istream& stream, const string& str, unsigned nchunks)
{
bool test __attribute__((unused)) = true;
string chunk;
string::size_type index = 0, index_new = 0;
unsigned n = 0;
while (stream >> chunk)
{
index_new = str.find(' ', index);
VERIFY( !str.compare(index, index_new - index, chunk) );
index = index_new + 1;
++n;
}
VERIFY( stream.eof() );
VERIFY( n == nchunks );
}
// istream& operator>>(istream&, string&)
@ -59,7 +62,8 @@ void test01()
{
const char filename[] = "inserters_extractors-3.txt";
const string data = prepare(666, 10);
const unsigned nchunks = 10;
const string data = prepare(666, nchunks);
ofstream ofstrm;
ofstrm.open(filename);
@ -68,7 +72,7 @@ void test01()
ifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data);
check(ifstrm, data, nchunks);
ifstrm.close();
}

10
libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/wchar_t/10.cc
View File

@ -38,20 +38,23 @@ wstring prepare(wstring::size_type len, unsigned nchunks, wchar_t delim)
return ret;
}
void check(wistream& stream, const wstring& str, wchar_t delim)
void check(wistream& stream, const wstring& str, unsigned nchunks, wchar_t delim)
{
bool test __attribute__((unused)) = true;
wstring chunk;
wstring::size_type index = 0, index_new = 0;
unsigned n = 0;
while (getline(stream, chunk, delim))
{
index_new = str.find(delim, index);
VERIFY( !str.compare(index, index_new - index, chunk) );
index = index_new + 1;
++n;
}
VERIFY( stream.eof() );
VERIFY( n == nchunks );
}
// istream& getline(istream&, string&, char)
@ -60,7 +63,8 @@ void test01()
const char filename[] = "inserters_extractors-2.txt";
const wchar_t delim = L'|';
const wstring data = prepare(777, 10, delim);
const unsigned nchunks = 10;
const wstring data = prepare(777, nchunks, delim);
wofstream ofstrm;
ofstrm.open(filename);
@ -69,7 +73,7 @@ void test01()
wifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data, delim);
check(ifstrm, data, nchunks, delim);
ifstrm.close();
}

10
libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/wchar_t/11.cc
View File

@ -38,20 +38,23 @@ wstring prepare(wstring::size_type len, unsigned nchunks)
return ret;
}
void check(wistream& stream, const wstring& str)
void check(wistream& stream, const wstring& str, unsigned nchunks)
{
bool test __attribute__((unused)) = true;
wstring chunk;
wstring::size_type index = 0, index_new = 0;
unsigned n = 0;
while (stream >> chunk)
{
index_new = str.find(L' ', index);
VERIFY( !str.compare(index, index_new - index, chunk) );
index = index_new + 1;
++n;
}
VERIFY( stream.eof() );
VERIFY( n == nchunks );
}
// istream& operator>>(istream&, string&)
@ -59,7 +62,8 @@ void test01()
{
const char filename[] = "inserters_extractors-3.txt";
const wstring data = prepare(666, 10);
const unsigned nchunks = 10;
const wstring data = prepare(666, nchunks);
wofstream ofstrm;
ofstrm.open(filename);
@ -68,7 +72,7 @@ void test01()
wifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data);
check(ifstrm, data, nchunks);
ifstrm.close();
}

10
libstdc++-v3/testsuite/27_io/basic_istream/getline/char/5.cc
View File

@ -38,12 +38,13 @@ string prepare(string::size_type len, unsigned nchunks, char delim)
return ret;
}
void check(istream& stream, const string& str, char delim)
void check(istream& stream, const string& str, unsigned nchunks, char delim)
{
bool test __attribute__((unused)) = true;
char buf[1000000];
string::size_type index = 0, index_new = 0;
unsigned n = 0;
while (stream.getline(buf, sizeof(buf), delim))
{
@ -51,9 +52,11 @@ void check(istream& stream, const string& str, char delim)
VERIFY( stream.gcount() == index_new - index + 1 );
VERIFY( !str.compare(index, index_new - index, buf) );
index = index_new + 1;
++n;
}
VERIFY( stream.gcount() == 0 );
VERIFY( stream.eof() );
VERIFY( n == nchunks );
}
void test01()
@ -61,7 +64,8 @@ void test01()
const char filename[] = "istream_getline.txt";
const char delim = '|';
const string data = prepare(777, 10, delim);
const unsigned nchunks = 10;
const string data = prepare(777, nchunks, delim);
ofstream ofstrm;
ofstrm.open(filename);
@ -70,7 +74,7 @@ void test01()
ifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data, delim);
check(ifstrm, data, nchunks, delim);
ifstrm.close();
}

84
libstdc++-v3/testsuite/27_io/basic_istream/ignore/char/2.cc Normal file
View File

@ -0,0 +1,84 @@
// Copyright (C) 2004 Free Software Foundation
//
// 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 27.6.1.3 unformatted input functions
#include <istream>
#include <string>
#include <fstream>
#include <limits>
#include <testsuite_hooks.h>
using namespace std;
string prepare(string::size_type len, unsigned nchunks, char delim)
{
string ret;
for (unsigned i = 0; i < nchunks; ++i)
{
for (string::size_type j = 0; j < len; ++j)
ret.push_back('a' + rand() % 26);
len *= 2;
ret.push_back(delim);
}
return ret;
}
void check(istream& stream, const string& str, unsigned nchunks, char delim)
{
bool test __attribute__((unused)) = true;
string::size_type index = 0, index_new = 0;
unsigned n = 0;
while (stream.ignore(numeric_limits<streamsize>::max(), delim).good())
{
index_new = str.find(delim, index);
VERIFY( stream.gcount() == index_new - index + 1 );
index = index_new + 1;
++n;
}
VERIFY( stream.gcount() == 0 );
VERIFY( !stream.fail() );
VERIFY( n == nchunks );
}
void test01()
{
const char filename[] = "istream_ignore.txt";
const char delim = '|';
const unsigned nchunks = 10;
const string data = prepare(555, nchunks, delim);
ofstream ofstrm;
ofstrm.open(filename);
ofstrm.write(data.data(), data.size());
ofstrm.close();
ifstream ifstrm;
ifstrm.open(filename);
check(ifstrm, data, nchunks, delim);
ifstrm.close();
}
int main()
{
test01();
return 0;
}