libstdc++-v3/include/bits/ostream.tcc

   1 // ostream classes -*- C++ -*-
   2
   3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   4 // 2006, 2007
   5 // Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 2, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING.  If not, write to the Free
  20 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21 // USA.
  22
  23 // As a special exception, you may use this file as part of a free software
  24 // library without restriction.  Specifically, if other files instantiate
  25 // templates or use macros or inline functions from this file, or you compile
  26 // this file and link it with other files to produce an executable, this
  27 // file does not by itself cause the resulting executable to be covered by
  28 // the GNU General Public License.  This exception does not however
  29 // invalidate any other reasons why the executable file might be covered by
  30 // the GNU General Public License.
  31
  32 /** @file ostream.tcc
  33  *  This is an internal header file, included by other library headers.
  34  *  You should not attempt to use it directly.
  35  */
  36
  37 //
  38 // ISO C++ 14882: 27.6.2  Output streams
  39 //
  40
  41 #ifndef _OSTREAM_TCC
  42 #define _OSTREAM_TCC 1
  43
  44 #pragma GCC system_header
  45
  46 #include <cxxabi-internal.h>
  47
  48 _GLIBCXX_BEGIN_NAMESPACE(std)
  49
  50   template<typename _CharT, typename _Traits>
  51     basic_ostream<_CharT, _Traits>::sentry::
  52     sentry(basic_ostream<_CharT, _Traits>& __os)
  53     : _M_ok(false), _M_os(__os)
  54     {
  55       // XXX MT
  56       if (__os.tie() && __os.good())
  57         __os.tie()->flush();
  58
  59       if (__os.good())
  60         _M_ok = true;
  61       else
  62         __os.setstate(ios_base::failbit);
  63     }
  64
  65   template<typename _CharT, typename _Traits>
  66     template<typename _ValueT>
  67       basic_ostream<_CharT, _Traits>&
  68       basic_ostream<_CharT, _Traits>::
  69       _M_insert(_ValueT __v)
  70       {
  71         sentry __cerb(*this);
  72         if (__cerb)
  73           {
  74             ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
  75             try
  76               {
  77                 const __num_put_type& __np = __check_facet(this->_M_num_put);
  78                 if (__np.put(*this, *this, this->fill(), __v).failed())
  79                   __err |= ios_base::badbit;
  80               }
  81             catch(__cxxabiv1::__forced_unwind&)
  82               {
  83                 this->_M_setstate(ios_base::badbit);
  84                 __throw_exception_again;
  85               }
  86             catch(...)
  87               { this->_M_setstate(ios_base::badbit); }
  88             if (__err)
  89               this->setstate(__err);
  90           }
  91         return *this;
  92       }
  93
  94   template<typename _CharT, typename _Traits>
  95     basic_ostream<_CharT, _Traits>&
  96     basic_ostream<_CharT, _Traits>::
  97     operator<<(short __n)
  98     {
  99       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 100       // 117. basic_ostream uses nonexistent num_put member functions.
 101       const ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
 102       if (__fmt == ios_base::oct || __fmt == ios_base::hex)
 103         return _M_insert(static_cast<long>(static_cast<unsigned short>(__n)));
 104       else
 105         return _M_insert(static_cast<long>(__n));
 106     }
 107
 108   template<typename _CharT, typename _Traits>
 109     basic_ostream<_CharT, _Traits>&
 110     basic_ostream<_CharT, _Traits>::
 111     operator<<(int __n)
 112     {
 113       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 114       // 117. basic_ostream uses nonexistent num_put member functions.
 115       const ios_base::fmtflags __fmt = this->flags() & ios_base::basefield;
 116       if (__fmt == ios_base::oct || __fmt == ios_base::hex)
 117         return _M_insert(static_cast<long>(static_cast<unsigned int>(__n)));
 118       else
 119         return _M_insert(static_cast<long>(__n));
 120     }
 121
 122   template<typename _CharT, typename _Traits>
 123     basic_ostream<_CharT, _Traits>&
 124     basic_ostream<_CharT, _Traits>::
 125     operator<<(__streambuf_type* __sbin)
 126     {
 127       ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
 128       sentry __cerb(*this);
 129       if (__cerb && __sbin)
 130         {
 131           try
 132             {
 133               if (!__copy_streambufs(__sbin, this->rdbuf()))
 134                 __err |= ios_base::failbit;
 135             }
 136           catch(__cxxabiv1::__forced_unwind&)
 137             {
 138               this->_M_setstate(ios_base::badbit);
 139               __throw_exception_again;
 140             }
 141           catch(...)
 142             { this->_M_setstate(ios_base::failbit); }
 143         }
 144       else if (!__sbin)
 145         __err |= ios_base::badbit;
 146       if (__err)
 147         this->setstate(__err);
 148       return *this;
 149     }
 150
 151   template<typename _CharT, typename _Traits>
 152     basic_ostream<_CharT, _Traits>&
 153     basic_ostream<_CharT, _Traits>::
 154     put(char_type __c)
 155     {
 156       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 157       // DR 60. What is a formatted input function?
 158       // basic_ostream::put(char_type) is an unformatted output function.
 159       // DR 63. Exception-handling policy for unformatted output.
 160       // Unformatted output functions should catch exceptions thrown
 161       // from streambuf members.
 162       sentry __cerb(*this);
 163       if (__cerb)
 164         {
 165           ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
 166           try
 167             {
 168               const int_type __put = this->rdbuf()->sputc(__c);
 169               if (traits_type::eq_int_type(__put, traits_type::eof()))
 170                 __err |= ios_base::badbit;
 171             }
 172           catch(__cxxabiv1::__forced_unwind&)
 173             {
 174               this->_M_setstate(ios_base::badbit);
 175               __throw_exception_again;
 176             }
 177           catch(...)
 178             { this->_M_setstate(ios_base::badbit); }
 179           if (__err)
 180             this->setstate(__err);
 181         }
 182       return *this;
 183     }
 184
 185   template<typename _CharT, typename _Traits>
 186     basic_ostream<_CharT, _Traits>&
 187     basic_ostream<_CharT, _Traits>::
 188     write(const _CharT* __s, streamsize __n)
 189     {
 190       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 191       // DR 60. What is a formatted input function?
 192       // basic_ostream::write(const char_type*, streamsize) is an
 193       // unformatted output function.
 194       // DR 63. Exception-handling policy for unformatted output.
 195       // Unformatted output functions should catch exceptions thrown
 196       // from streambuf members.
 197       sentry __cerb(*this);
 198       if (__cerb)
 199         {
 200           try
 201             { _M_write(__s, __n); }
 202           catch(__cxxabiv1::__forced_unwind&)
 203             {
 204               this->_M_setstate(ios_base::badbit);
 205               __throw_exception_again;
 206             }
 207           catch(...)
 208             { this->_M_setstate(ios_base::badbit); }
 209         }
 210       return *this;
 211     }
 212
 213   template<typename _CharT, typename _Traits>
 214     basic_ostream<_CharT, _Traits>&
 215     basic_ostream<_CharT, _Traits>::
 216     flush()
 217     {
 218       // _GLIBCXX_RESOLVE_LIB_DEFECTS
 219       // DR 60. What is a formatted input function?
 220       // basic_ostream::flush() is *not* an unformatted output function.
 221       ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
 222       try
 223         {
 224           if (this->rdbuf() && this->rdbuf()->pubsync() == -1)
 225             __err |= ios_base::badbit;
 226         }
 227       catch(__cxxabiv1::__forced_unwind&)
 228         {
 229           this->_M_setstate(ios_base::badbit);
 230           __throw_exception_again;
 231         }
 232       catch(...)
 233         { this->_M_setstate(ios_base::badbit); }
 234       if (__err)
 235         this->setstate(__err);
 236       return *this;
 237     }
 238
 239   template<typename _CharT, typename _Traits>
 240     typename basic_ostream<_CharT, _Traits>::pos_type
 241     basic_ostream<_CharT, _Traits>::
 242     tellp()
 243     {
 244       pos_type __ret = pos_type(-1);
 245       try
 246         {
 247           if (!this->fail())
 248             __ret = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::out);
 249         }
 250       catch(__cxxabiv1::__forced_unwind&)
 251         {
 252           this->_M_setstate(ios_base::badbit);
 253           __throw_exception_again;
 254         }
 255       catch(...)
 256         { this->_M_setstate(ios_base::badbit); }
 257       return __ret;
 258     }
 259
 260   template<typename _CharT, typename _Traits>
 261     basic_ostream<_CharT, _Traits>&
 262     basic_ostream<_CharT, _Traits>::
 263     seekp(pos_type __pos)
 264     {
 265       ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
 266       try
 267         {
 268           if (!this->fail())
 269             {
 270               // _GLIBCXX_RESOLVE_LIB_DEFECTS
 271               // 136.  seekp, seekg setting wrong streams?
 272               const pos_type __p = this->rdbuf()->pubseekpos(__pos,
 273                                                              ios_base::out);
 274
 275               // 129. Need error indication from seekp() and seekg()
 276               if (__p == pos_type(off_type(-1)))
 277                 __err |= ios_base::failbit;
 278             }
 279         }
 280       catch(__cxxabiv1::__forced_unwind&)
 281         {
 282           this->_M_setstate(ios_base::badbit);
 283           __throw_exception_again;
 284         }
 285       catch(...)
 286         { this->_M_setstate(ios_base::badbit); }
 287       if (__err)
 288         this->setstate(__err);
 289       return *this;
 290     }
 291
 292   template<typename _CharT, typename _Traits>
 293     basic_ostream<_CharT, _Traits>&
 294     basic_ostream<_CharT, _Traits>::
 295     seekp(off_type __off, ios_base::seekdir __dir)
 296     {
 297       ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
 298       try
 299         {
 300           if (!this->fail())
 301             {
 302               // _GLIBCXX_RESOLVE_LIB_DEFECTS
 303               // 136.  seekp, seekg setting wrong streams?
 304               const pos_type __p = this->rdbuf()->pubseekoff(__off, __dir,
 305                                                              ios_base::out);
 306
 307               // 129. Need error indication from seekp() and seekg()
 308               if (__p == pos_type(off_type(-1)))
 309                 __err |= ios_base::failbit;
 310             }
 311         }
 312       catch(__cxxabiv1::__forced_unwind&)
 313         {
 314           this->_M_setstate(ios_base::badbit);
 315           __throw_exception_again;
 316         }
 317       catch(...)
 318         { this->_M_setstate(ios_base::badbit); }
 319       if (__err)
 320         this->setstate(__err);
 321       return *this;
 322     }
 323
 324   template<typename _CharT, typename _Traits>
 325     basic_ostream<_CharT, _Traits>&
 326     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
 327     {
 328       if (!__s)
 329         __out.setstate(ios_base::badbit);
 330       else
 331         {
 332           // _GLIBCXX_RESOLVE_LIB_DEFECTS
 333           // 167.  Improper use of traits_type::length()
 334           const size_t __clen = char_traits<char>::length(__s);
 335           try
 336             {
 337               struct __ptr_guard
 338               {
 339                 _CharT *p;
 340                 __ptr_guard (_CharT *ip): p(ip) { }
 341                 ~__ptr_guard() { delete[] p; }
 342                 _CharT* __get() { return p; }
 343               } __pg (new _CharT[__clen]);
 344
 345               _CharT *__ws = __pg.__get();
 346               for (size_t  __i = 0; __i < __clen; ++__i)
 347                 __ws[__i] = __out.widen(__s[__i]);
 348               __ostream_insert(__out, __ws, __clen);
 349             }
 350           catch(__cxxabiv1::__forced_unwind&)
 351             {
 352               __out._M_setstate(ios_base::badbit);
 353               __throw_exception_again;
 354             }
 355           catch(...)
 356             { __out._M_setstate(ios_base::badbit); }
 357         }
 358       return __out;
 359     }
 360
 361   // Inhibit implicit instantiations for required instantiations,
 362   // which are defined via explicit instantiations elsewhere.
 363   // NB:  This syntax is a GNU extension.
 364 #if _GLIBCXX_EXTERN_TEMPLATE
 365   extern template class basic_ostream<char>;
 366   extern template ostream& endl(ostream&);
 367   extern template ostream& ends(ostream&);
 368   extern template ostream& flush(ostream&);
 369   extern template ostream& operator<<(ostream&, char);
 370   extern template ostream& operator<<(ostream&, unsigned char);
 371   extern template ostream& operator<<(ostream&, signed char);
 372   extern template ostream& operator<<(ostream&, const char*);
 373   extern template ostream& operator<<(ostream&, const unsigned char*);
 374   extern template ostream& operator<<(ostream&, const signed char*);
 375
 376   extern template ostream& ostream::_M_insert(long);
 377   extern template ostream& ostream::_M_insert(unsigned long);
 378   extern template ostream& ostream::_M_insert(bool);
 379 #ifdef _GLIBCXX_USE_LONG_LONG
 380   extern template ostream& ostream::_M_insert(long long);
 381   extern template ostream& ostream::_M_insert(unsigned long long);
 382 #endif
 383   extern template ostream& ostream::_M_insert(double);
 384   extern template ostream& ostream::_M_insert(long double);
 385   extern template ostream& ostream::_M_insert(const void*);
 386
 387 #ifdef _GLIBCXX_USE_WCHAR_T
 388   extern template class basic_ostream<wchar_t>;
 389   extern template wostream& endl(wostream&);
 390   extern template wostream& ends(wostream&);
 391   extern template wostream& flush(wostream&);
 392   extern template wostream& operator<<(wostream&, wchar_t);
 393   extern template wostream& operator<<(wostream&, char);
 394   extern template wostream& operator<<(wostream&, const wchar_t*);
 395   extern template wostream& operator<<(wostream&, const char*);
 396
 397   extern template wostream& wostream::_M_insert(long);
 398   extern template wostream& wostream::_M_insert(unsigned long);
 399   extern template wostream& wostream::_M_insert(bool);
 400 #ifdef _GLIBCXX_USE_LONG_LONG
 401   extern template wostream& wostream::_M_insert(long long);
 402   extern template wostream& wostream::_M_insert(unsigned long long);
 403 #endif
 404   extern template wostream& wostream::_M_insert(double);
 405   extern template wostream& wostream::_M_insert(long double);
 406   extern template wostream& wostream::_M_insert(const void*);
 407 #endif
 408 #endif
 409
 410 _GLIBCXX_END_NAMESPACE
 411
 412 #endif