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gcc/libstdc++-v3/include/bits/ostream.tcc
Stephen M. Webb fed3b7b431 ostream.tcc (ostream::put): Fixed error condition check. 
2001-07-18  Stephen M. Webb  <stephen@bregmasoft..com>
            Roman Sulzhyk  <roman_sulzhyk@yahoo.com>

        libstdc++/3599
        * include/bits/ostream.tcc (ostream::put): Fixed error condition check.
        * testsuite/27_io/streambuf.cc (test07): Added new regression test.

Co-Authored-By: Roman Sulzhyk <roman_sulzhyk@yahoo.com>

From-SVN: r44122
2001-07-18 17:58:37 +00:00

756 lines
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// Copyright (C) 1997, 1998, 1999, 2000, 2001 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// ISO C++ 14882: 27.6.2 Output streams
//
#include <bits/std_locale.h>
namespace std
{
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>::sentry::
sentry(basic_ostream<_CharT,_Traits>& __os)
: _M_ok(__os.good()), _M_os(__os)
{
// XXX MT
if (_M_ok && __os.tie())
__os.tie()->flush();
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::
operator<<(__ostream_type& (*__pf)(__ostream_type&))
{
sentry __cerb(*this);
if (__cerb)
{
try
{ __pf(*this); }
catch(exception& __fail)
{
// 27.6.2.5.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::
operator<<(__ios_type& (*__pf)(__ios_type&))
{
sentry __cerb(*this);
if (__cerb)
{
try
{ __pf(*this); }
catch(exception& __fail)
{
// 27.6.2.5.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::
operator<<(ios_base& (*__pf)(ios_base&))
{
sentry __cerb(*this);
if (__cerb)
{
try
{ __pf(*this); }
catch(exception& __fail)
{
// 27.6.2.5.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(bool __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
if (_M_check_facet(_M_fnumput))
if (_M_fnumput->put(*this, *this, this->fill(), __n).failed())
this->setstate(ios_base::badbit);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(long __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
char_type __c = this->fill();
ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
if (_M_check_facet(_M_fnumput))
{
bool __b = false;
if (__fmt & ios_base::oct || __fmt & ios_base::hex)
{
unsigned long __l = static_cast<unsigned long>(__n);
__b = _M_fnumput->put(*this, *this, __c, __l).failed();
}
else
__b = _M_fnumput->put(*this, *this, __c, __n).failed();
if (__b)
this->setstate(ios_base::badbit);
}
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(unsigned long __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
if (_M_check_facet(_M_fnumput))
if (_M_fnumput->put(*this, *this, this->fill(), __n).failed())
this->setstate(ios_base::badbit);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
#ifdef _GLIBCPP_USE_LONG_LONG
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(long long __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
char_type __c = this->fill();
ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
if (_M_check_facet(_M_fnumput))
{
bool __b = false;
if (__fmt & ios_base::oct || __fmt & ios_base::hex)
{
unsigned long long __l;
__l = static_cast<unsigned long long>(__n);
__b = _M_fnumput->put(*this, *this, __c, __l).failed();
}
else
__b = _M_fnumput->put(*this, *this, __c, __n).failed();
if (__b)
this->setstate(ios_base::badbit);
}
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(unsigned long long __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
if (_M_check_facet(_M_fnumput))
if (_M_fnumput->put(*this, *this, this->fill(), __n).failed())
this->setstate(ios_base::badbit);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
#endif
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(double __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
if (_M_check_facet(_M_fnumput))
if (_M_fnumput->put(*this, *this, this->fill(), __n).failed())
this->setstate(ios_base::badbit);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(long double __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
if (_M_check_facet(_M_fnumput))
if (_M_fnumput->put(*this, *this, this->fill(), __n).failed())
this->setstate(ios_base::badbit);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(const void* __n)
{
sentry __cerb(*this);
if (__cerb)
{
try
{
if (_M_check_facet(_M_fnumput))
if (_M_fnumput->put(*this, *this, this->fill(), __n).failed())
this->setstate(ios_base::badbit);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
this->setstate(ios_base::badbit);
if ((this->exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::operator<<(__streambuf_type* __sbin)
{
streamsize __xtrct = 0;
__streambuf_type* __sbout = this->rdbuf();
sentry __cerb(*this);
if (__sbin && __cerb)
__xtrct = __copy_streambufs(*this, __sbin, __sbout);
if (!__sbin || !__xtrct)
this->setstate(ios_base::failbit);
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::put(char_type __c)
{
sentry __cerb(*this);
if (__cerb)
{
int_type __put = rdbuf()->sputc(__c);
if (traits_type::eq_int_type(__put, traits_type::eof()))
this->setstate(ios_base::badbit);
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::write(const _CharT* __s, streamsize __n)
{
sentry __cerb(*this);
if (__cerb)
{
streamsize __put = this->rdbuf()->sputn(__s, __n);
if ( __put != __n)
this->setstate(ios_base::badbit);
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::flush()
{
sentry __cerb(*this);
if (__cerb)
{
if (this->rdbuf() && this->rdbuf()->pubsync() == -1)
this->setstate(ios_base::badbit);
}
return *this;
}
template<typename _CharT, typename _Traits>
typename basic_ostream<_CharT, _Traits>::pos_type
basic_ostream<_CharT, _Traits>::tellp()
{
pos_type __ret = pos_type(-1);
bool __testok = this->fail() != true;
if (__testok)
__ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::out);
return __ret;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::seekp(pos_type __pos)
{
bool __testok = this->fail() != true;
if (__testok)
{
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 136. seekp, seekg setting wrong streams?
pos_type __err = this->rdbuf()->pubseekpos(__pos, ios_base::out);
// 129. Need error indication from seekp() and seekg()
if (__err == pos_type(off_type(-1)))
this->setstate(failbit);
#endif
}
return *this;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
basic_ostream<_CharT, _Traits>::
seekp(off_type __off, ios_base::seekdir __d)
{
bool __testok = this->fail() != true;
if (__testok)
{
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 136. seekp, seekg setting wrong streams?
pos_type __err = this->rdbuf()->pubseekoff(__off, __d,
ios_base::out);
// 129. Need error indication from seekp() and seekg()
if (__err == pos_type(off_type(-1)))
this->setstate(failbit);
}
#endif
return *this;
}
// 27.6.2.5.4 Character inserters
// Construct correctly padded string, as per 22.2.2.2.2
// Similar in theory to __pad_numeric, from num_put, but it doesn't
// use _S_fill: perhaps it should.
// Assumes
// __newlen > __oldlen
// __news is allocated for __newlen size
template<typename _CharT, typename _Traits>
void
__pad_char(basic_ios<_CharT, _Traits>& __ios,
_CharT* __news, const _CharT* __olds,
const streamsize __newlen, const streamsize __oldlen)
{
typedef _CharT char_type;
typedef _Traits traits_type;
typedef typename traits_type::int_type int_type;
int_type __plen = static_cast<size_t>(__newlen - __oldlen);
char_type* __pads = static_cast<char_type*>(__builtin_alloca(sizeof(char_type) * __plen));
traits_type::assign(__pads, __plen, __ios.fill());
char_type* __beg;
char_type* __end;
size_t __mod = 0;
size_t __beglen; //either __plen or __oldlen
ios_base::fmtflags __fmt = __ios.flags() & ios_base::adjustfield;
if (__fmt == ios_base::left)
{
// Padding last.
__beg = const_cast<char_type*>(__olds);
__beglen = __oldlen;
__end = __pads;
}
else if (__fmt == ios_base::internal)
{
// Pad after the sign, if there is one.
// Pad after 0[xX], if there is one.
// Who came up with these rules, anyway? Jeeze.
typedef _Format_cache<_CharT> __cache_type;
__cache_type const* __fmt = __cache_type::_S_get(__ios);
const char_type* __minus = traits_type::find(__olds, __oldlen,
__fmt->_S_minus);
const char_type* __plus = traits_type::find(__olds, __oldlen,
__fmt->_S_plus);
bool __testsign = __minus || __plus;
bool __testhex = __olds[0] == '0'
&& (__olds[1] == 'x' || __olds[1] == 'X');
if (__testhex)
{
__news[0] = __olds[0];
__news[1] = __olds[1];
__mod += 2;
__beg = const_cast<char_type*>(__olds + __mod);
__beglen = __oldlen - __mod;
__end = __pads;
}
else if (__testsign)
{
__mod += __plen;
const char_type* __sign = __minus ? __minus + 1: __plus + 1;
__beg = const_cast<char_type*>(__olds);
__beglen = __sign - __olds;
__end = const_cast<char_type*>(__sign + __plen);
traits_type::copy(__news + __beglen, __pads, __plen);
}
else
{
// Padding first.
__beg = __pads;
__beglen = __plen;
__end = const_cast<char_type*>(__olds);
}
}
else
{
// Padding first.
__beg = __pads;
__beglen = __plen;
__end = const_cast<char_type*>(__olds);
}
traits_type::copy(__news, __beg, __beglen);
traits_type::copy(__news + __beglen, __end, __newlen - __beglen - __mod);
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
try
{
streamsize __w = __out.width();
_CharT* __pads = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __w));
__pads[0] = __c;
streamsize __len = 1;
if (__w > __len)
{
__pad_char(__out, __pads, &__c, __w, __len);
__len = __w;
}
__out.write(__pads, __len);
__out.width(0);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
__out.setstate(ios_base::badbit);
if ((__out.exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return __out;
}
// Specialization
template <class _Traits>
basic_ostream<char, _Traits>&
operator<<(basic_ostream<char, _Traits>& __out, char __c)
{
typedef basic_ostream<char, _Traits> __ostream_type;
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
try
{
streamsize __w = __out.width();
char* __pads = static_cast<char*>(__builtin_alloca(__w + 1));
__pads[0] = __c;
streamsize __len = 1;
if (__w > __len)
{
__pad_char(__out, __pads, &__c, __w, __len);
__len = __w;
}
__out.write(__pads, __len);
__out.width(0);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
__out.setstate(ios_base::badbit);
if ((__out.exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return __out;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
try
{
streamsize __w = __out.width();
_CharT* __pads = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __w));
streamsize __len = static_cast<streamsize>(_Traits::length(__s));
if (__w > __len)
{
__pad_char(__out, __pads, __s, __w, __len);
__s = __pads;
__len = __w;
}
__out.write(__s, __len);
__out.width(0);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
__out.setstate(ios_base::badbit);
if ((__out.exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return __out;
}
template<typename _CharT, typename _Traits>
basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 167. Improper use of traits_type::length()
typedef char_traits<char> __ctraits_type;
#endif
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
size_t __clen = __ctraits_type::length(__s);
_CharT* __ws = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * (__clen + 1)));
for (size_t __i = 0; __i <= __clen; ++__i)
__ws[__i] = __out.widen(__s[__i]);
_CharT* __str = __ws;
try
{
streamsize __len = static_cast<streamsize>(__clen);
streamsize __w = __out.width();
_CharT* __pads = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __w));
if (__w > __len)
{
__pad_char(__out, __pads, __ws, __w, __len);
__str = __pads;
__len = __w;
}
__out.write(__str, __len);
__out.width(0);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
__out.setstate(ios_base::badbit);
if ((__out.exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return __out;
}
// Partial specializationss
template<class _Traits>
basic_ostream<char, _Traits>&
operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
{
typedef basic_ostream<char, _Traits> __ostream_type;
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
try
{
streamsize __w = __out.width();
char* __pads = static_cast<char*>(__builtin_alloca(__w));
streamsize __len = static_cast<streamsize>(_Traits::length(__s));
if (__w > __len)
{
__pad_char(__out, __pads, __s, __w, __len);
__s = __pads;
__len = __w;
}
__out.write(__s, __len);
__out.width(0);
}
catch(exception& __fail)
{
// 27.6.1.2.1 Common requirements.
// Turn this on without causing an ios::failure to be thrown.
__out.setstate(ios_base::badbit);
if ((__out.exceptions() & ios_base::badbit) != 0)
__throw_exception_again;
}
}
return __out;
}
// 21.3.7.9 basic_string::operator<<
template<typename _CharT, typename _Traits, typename _Alloc>
basic_ostream<_CharT, _Traits>&
operator<<(basic_ostream<_CharT, _Traits>& __out,
const basic_string<_CharT, _Traits, _Alloc>& __str)
{
typedef basic_ostream<_CharT, _Traits> __ostream_type;
typename __ostream_type::sentry __cerb(__out);
if (__cerb)
{
const _CharT* __s = __str.data();
streamsize __w = __out.width();
_CharT* __pads = static_cast<_CharT*>(__builtin_alloca(sizeof(_CharT) * __w));
streamsize __len = static_cast<streamsize>(__str.size());
#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
// 25. String operator<< uses width() value wrong
#endif
if (__w > __len)
{
__pad_char(__out, __pads, __s, __w, __len);
__s = __pads;
__len = __w;
}
streamsize __res = __out.rdbuf()->sputn(__s, __len);
__out.width(0);
if (__res != __len)
__out.setstate(ios_base::failbit);
}
return __out;
}
} // namespace std
// Local Variables:
// mode:C++
// End:
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