ostream.tcc

来自「ARM Linux Tool 各种代码包括MTD」· TCC 代码 · 共 756 行 · 第 1/2 页

    }

  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: