_sstream.c

symbian 上的stl_port进过编译的。

      this->setg(__data_ptr, __data_ptr + __get_offset, __data_ptr + __data_size);
      this->setp(__data_ptr, __data_ptr + __data_size);
      this->pbump((int)__data_size);
    }
    else {
      _M_append_buffer();
      _M_str.append(__app_size, __c);
    }

    __nwritten += __app_size;
  }

  return __nwritten;
}

// According to the C++ standard the effects of setbuf are implementation
// defined, except that setbuf(0, 0) has no effect.  In this implementation,
// setbuf(<anything>, n), for n > 0, calls reserve(n) on the underlying
// string.
template <class _CharT, class _Traits, class _Alloc>
basic_streambuf<_CharT, _Traits>*
basic_stringbuf<_CharT, _Traits, _Alloc>::setbuf(_CharT*, streamsize __n) {
  if (__n > 0) {
    bool __do_get_area = false;
    bool __do_put_area = false;
    ptrdiff_t __offg = 0;
    ptrdiff_t __offp = 0;

    if (this->pbase() == _M_str.data()) {
      __do_put_area = true;
      __offp = this->pptr() - this->pbase();
    }

    if (this->eback() == _M_str.data()) {
      __do_get_area = true;
      __offg = this->gptr() - this->eback();
    }

    if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in))
      _M_append_buffer();

    _M_str.reserve(sizeof(streamsize) > sizeof(size_t) ? __STATIC_CAST(size_t, (min)(__n, __STATIC_CAST(streamsize, _M_str.max_size())))
                                                       : __STATIC_CAST(size_t, __n));

    _CharT* __data_ptr = __CONST_CAST(_CharT*, _M_str.data());
    size_t __data_size = _M_str.size();

    if (__do_get_area) {
      this->setg(__data_ptr, __data_ptr + __offg, __data_ptr + __data_size);
    }

    if (__do_put_area) {
      this->setp(__data_ptr, __data_ptr + __data_size);
      this->pbump((int)__offp);
    }
  }

  return this;
}

template <class _CharT, class _Traits, class _Alloc>
__BSB_pos_type__
basic_stringbuf<_CharT, _Traits, _Alloc>
  ::seekoff(off_type __off,
            ios_base::seekdir __dir,
            ios_base::openmode __mode) {
  __mode &= _M_mode;

  bool __imode  = (__mode & ios_base::in) != 0;
  bool __omode = (__mode & ios_base::out) != 0;

  if ( !(__imode || __omode) )
    return pos_type(off_type(-1));

  if ( (__imode && (this->gptr() == 0)) || (__omode && (this->pptr() == 0)) )
    return pos_type(off_type(-1));

  if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in))
    _M_append_buffer();

  streamoff __newoff;
  switch(__dir) {
  case ios_base::beg:
    __newoff = 0;
    break;
  case ios_base::end:
    __newoff = _M_str.size();
    break;
  case ios_base::cur:
    __newoff = __imode ? this->gptr() - this->eback() : this->pptr() - this->pbase();
    break;
  default:
    return pos_type(off_type(-1));
  }

  __off += __newoff;

  if (__imode) {
    ptrdiff_t __n = this->egptr() - this->eback();

    if (__off < 0 || __off > __n)
      return pos_type(off_type(-1));
    this->setg(this->eback(), this->eback() + __STATIC_CAST(ptrdiff_t, __off),
                              this->eback() + __STATIC_CAST(ptrdiff_t, __n));
  }

  if (__omode) {
    ptrdiff_t __n = this->epptr() - this->pbase();

    if (__off < 0 || __off > __n)
      return pos_type(off_type(-1));
    this->setp(this->pbase(), this->pbase() + __n);
    this->pbump((int)__off);
  }

  return pos_type(__off);
}

template <class _CharT, class _Traits, class _Alloc>
__BSB_pos_type__
basic_stringbuf<_CharT, _Traits, _Alloc>
  ::seekpos(pos_type __pos, ios_base::openmode __mode) {
  __mode &= _M_mode;

  bool __imode  = (__mode & ios_base::in) != 0;
  bool __omode = (__mode & ios_base::out) != 0;

  if ( !(__imode || __omode) )
    return pos_type(off_type(-1));

  if ( (__imode && (this->gptr() == 0)) || (__omode && (this->pptr() == 0)) )
    return pos_type(off_type(-1));

  const off_type __n = __pos - pos_type(off_type(0));
  if ((_M_mode & ios_base::out) && !(_M_mode & ios_base::in))
    _M_append_buffer();

  if (__imode) {
    if (__n < 0 || __n > this->egptr() - this->eback())
      return pos_type(off_type(-1));
    this->setg(this->eback(), this->eback() + __STATIC_CAST(ptrdiff_t, __n), this->egptr());
  }

  if (__omode) {
    if (__n < 0 || size_t(__n) > _M_str.size())
      return pos_type(off_type(-1));

    _CharT* __data_ptr = __CONST_CAST(_CharT*,_M_str.data());
    size_t __data_size = _M_str.size();

    this->setp(__data_ptr, __data_ptr+__data_size);
    this->pbump((int)__n);
  }

  return __pos;
}

// This is declared as a const member function because it is
// called by basic_stringbuf<>::str().  Precondition: this is a
// write-only stringbuf.  We can't use an output buffer for read-
// write stringbufs.  Postcondition: pptr is reset to the beginning
// of the buffer.
template <class _CharT, class _Traits, class _Alloc>
void basic_stringbuf<_CharT, _Traits, _Alloc>::_M_append_buffer() const {
  // Do we have a buffer to append?
  if (this->pbase() == this->_M_Buf && this->pptr() != this->_M_Buf) {
    basic_stringbuf<_CharT, _Traits, _Alloc>* __this = __CONST_CAST(_Self*,this);
    __this->_M_str.append((const _CharT*)this->pbase(), (const _CharT*)this->pptr());
#ifndef __MWERKS__
    __this->setp(__CONST_CAST(_CharT*,_M_Buf),
                 __CONST_CAST(_CharT*,_M_Buf + __STATIC_CAST(int,_S_BufSiz)));
#else // CodeWarrior treat const char * and const char [8] as different types
    __this->setp((_CharT*)_M_Buf,
                 (_CharT*)(_M_Buf + __STATIC_CAST(int,_S_BufSiz)));
#endif
  }

  // Have we run off the end of the string?
  else if (this->pptr() == this->epptr()) {
    basic_stringbuf<_CharT, _Traits, _Alloc>* __this = __CONST_CAST(_Self*,this);
#ifndef __MWERKS__
    __this->setp(__CONST_CAST(_CharT*,_M_Buf),
                 __CONST_CAST(_CharT*,_M_Buf + __STATIC_CAST(int,_S_BufSiz)));
#else // CodeWarrior treat const char * and const char [8] as different types
    __this->setp((_CharT*)_M_Buf,
                 (_CharT*)(_M_Buf + __STATIC_CAST(int,_S_BufSiz)));
#endif
  }
}

//----------------------------------------------------------------------
// Non-inline istringstream member functions.

template <class _CharT, class _Traits, class _Alloc>
basic_istringstream<_CharT, _Traits, _Alloc>
  ::basic_istringstream(ios_base::openmode __mode)
    : basic_istream<_CharT, _Traits>(0),
      _M_buf(__mode | ios_base::in) {
  this->init(&_M_buf);
}

template <class _CharT, class _Traits, class _Alloc>
basic_istringstream<_CharT, _Traits, _Alloc>
  ::basic_istringstream(const _String& __str,ios_base::openmode __mode)
    : basic_istream<_CharT, _Traits>(0),
      _M_buf(__str, __mode | ios_base::in) {
  this->init(&_M_buf);
}

template <class _CharT, class _Traits, class _Alloc>
basic_istringstream<_CharT, _Traits, _Alloc>::~basic_istringstream()
{}

//----------------------------------------------------------------------
// Non-inline ostringstream member functions.

template <class _CharT, class _Traits, class _Alloc>
basic_ostringstream<_CharT, _Traits, _Alloc>
  ::basic_ostringstream(ios_base::openmode __mode)
    : basic_ostream<_CharT, _Traits>(0),
      _M_buf(__mode | ios_base::out) {
  this->init(&_M_buf);
}

template <class _CharT, class _Traits, class _Alloc>
basic_ostringstream<_CharT, _Traits, _Alloc>
  ::basic_ostringstream(const _String& __str, ios_base::openmode __mode)
    : basic_ostream<_CharT, _Traits>(0),
      _M_buf(__str, __mode | ios_base::out) {
  this->init(&_M_buf);
}

template <class _CharT, class _Traits, class _Alloc>
basic_ostringstream<_CharT, _Traits, _Alloc>::~basic_ostringstream()
{}

//----------------------------------------------------------------------
// Non-inline stringstream member functions.

template <class _CharT, class _Traits, class _Alloc>
basic_stringstream<_CharT, _Traits, _Alloc>
  ::basic_stringstream(ios_base::openmode __mode)
    : basic_iostream<_CharT, _Traits>(0), _M_buf(__mode) {
   this->init(&_M_buf);
}

template <class _CharT, class _Traits, class _Alloc>
basic_stringstream<_CharT, _Traits, _Alloc>
  ::basic_stringstream(const _String& __str, ios_base::openmode __mode)
    : basic_iostream<_CharT, _Traits>(0), _M_buf(__str, __mode) {
  this->init(&_M_buf);
}

template <class _CharT, class _Traits, class _Alloc>
basic_stringstream<_CharT, _Traits, _Alloc>::~basic_stringstream()
{}

_STLP_END_NAMESPACE

# undef __BSB_int_type__
# undef __BSB_pos_type__

#endif /* _STLP_SSTREAM_C */

// Local Variables:
// mode:C++
// End: