/*

 * Copyright (c) 1999

 * Silicon Graphics Computer Systems, Inc.

 *

 * Copyright (c) 1999

 * Boris Fomitchev

 *

 * This material is provided "as is", with absolutely no warranty expressed

 * or implied. Any use is at your own risk.

 *

 * Permission to use or copy this software for any purpose is hereby granted

 * without fee, provided the above notices are retained on all copies.

 * Permission to modify the code and to distribute modified code is granted,

 * provided the above notices are retained, and a notice that the code was

 * modified is included with the above copyright notice.

 *

 */

#include "stlport_prefix.h"

#include <algorithm>

#include <ios>

#include <locale>

#include <ostream> // for __get_ostreambuf definition

#include "aligned_buffer.h"

_STLP_BEGIN_NAMESPACE

//----------------------------------------------------------------------

// ios_base members

// class ios_base::failure, a subclass of exception.  It's used solely

// for reporting errors.

ios_base::failure::failure(const string& s)

  : __Named_exception(s)

{}

ios_base::failure::~failure() _STLP_NOTHROW_INHERENTLY {}

#if !defined (_STLP_STATIC_CONST_INIT_BUG) && !defined (_STLP_NO_STATIC_CONST_DEFINITION)

// Definitions of ios_base's formatting flags.

const ios_base::fmtflags ios_base::left;

const ios_base::fmtflags ios_base::right;

const ios_base::fmtflags ios_base::internal;

const ios_base::fmtflags ios_base::dec;

const ios_base::fmtflags ios_base::hex;

const ios_base::fmtflags ios_base::oct;

const ios_base::fmtflags ios_base::fixed;

const ios_base::fmtflags ios_base::scientific;

const ios_base::fmtflags ios_base::boolalpha;

const ios_base::fmtflags ios_base::showbase;

const ios_base::fmtflags ios_base::showpoint;

const ios_base::fmtflags ios_base::showpos;

const ios_base::fmtflags ios_base::skipws;

const ios_base::fmtflags ios_base::unitbuf;

const ios_base::fmtflags ios_base::uppercase;

const ios_base::fmtflags ios_base::adjustfield;

const ios_base::fmtflags ios_base::basefield;

const ios_base::fmtflags ios_base::floatfield;

// Definitions of ios_base's state flags.

const ios_base::iostate ios_base::goodbit;

const ios_base::iostate ios_base::badbit;

const ios_base::iostate ios_base::eofbit;

const ios_base::iostate ios_base::failbit;

// Definitions of ios_base's openmode flags.

const ios_base::openmode ios_base::app;

const ios_base::openmode ios_base::ate;

const ios_base::openmode ios_base::binary;

const ios_base::openmode ios_base::in;

const ios_base::openmode ios_base::out;

const ios_base::openmode ios_base::trunc;

// Definitions of ios_base's seekdir flags.

const ios_base::seekdir ios_base::beg;

const ios_base::seekdir ios_base::cur;

const ios_base::seekdir ios_base::end;

#endif

// Internal functions used for managing exponentially-growing arrays of

// POD types.

// array is a pointer to N elements of type PODType.  Expands the array,

// if necessary, so that array[index] is meaningful.  All new elements are

// initialized to zero.  Returns a pointer to the new array, and the new

// size.

template <class PODType>

static pair<PODType*, size_t>

_Stl_expand_array(PODType* __array, size_t N, int index) {

  if ((int)N < index + 1) {

    size_t new_N = (max)(2 * N, size_t(index + 1));

    PODType* new_array

      = __STATIC_CAST(PODType*,realloc(__array, new_N * sizeof(PODType)));

    if (new_array) {

      fill(new_array + N, new_array + new_N, PODType());

      return pair<PODType*, size_t>(new_array, new_N);

    }

    else

      return pair<PODType*, size_t>(__STATIC_CAST(PODType*,0), 0);

  }

  else

    return pair<PODType*, size_t>(__array, N);

}

// array is a pointer to N elements of type PODType.  Allocate a new

// array of N elements, copying the values from the old array to the new.

// Return a pointer to the new array.  It is assumed that array is non-null

// and N is nonzero.

template <class PODType>

static PODType* _Stl_copy_array(const PODType* __array, size_t N) {

  PODType* result = __STATIC_CAST(PODType*,malloc(N * sizeof(PODType)));

  if (result)

    copy(__array, __array + N, result);

  return result;

}

locale ios_base::imbue(const locale& loc) {

  if (loc != _M_locale) {

    locale previous = _M_locale;

    _M_locale = loc;

    _M_invoke_callbacks(imbue_event);

    return previous;

  }

  else {

    _M_invoke_callbacks(imbue_event);

    return _M_locale;

  }

}

int _STLP_CALL ios_base::xalloc() {

#if defined (_STLP_THREADS) && \

    defined (_STLP_WIN32THREADS) && defined (_STLP_NEW_PLATFORM_SDK)

  static volatile __stl_atomic_t _S_index = 0;

  return _STLP_ATOMIC_INCREMENT(&_S_index);

#else

  static int _S_index = 0;

  static _STLP_STATIC_MUTEX __lock _STLP_MUTEX_INITIALIZER;

  _STLP_auto_lock sentry(__lock);

  return _S_index++;

#endif

}

long& ios_base::iword(int index) {

  static long dummy = 0;

  pair<long*, size_t> tmp = _Stl_expand_array(_M_iwords, _M_num_iwords, index);

  if (tmp.first) {              // The allocation, if any, succeeded.

    _M_iwords = tmp.first;

    _M_num_iwords = tmp.second;

    return _M_iwords[index];

  }

  else {

    _M_setstate_nothrow(badbit);

    _M_check_exception_mask();

    return dummy;

  }

}

void*& ios_base::pword(int index) {

  static void* dummy = 0;

  pair<void**, size_t> tmp = _Stl_expand_array(_M_pwords, _M_num_pwords, index);

  if (tmp.first) {              // The allocation, if any, succeeded.

    _M_pwords = tmp.first;

    _M_num_pwords = tmp.second;

    return _M_pwords[index];

  }

  else {

    _M_setstate_nothrow(badbit);

    _M_check_exception_mask();

    return dummy;

  }

}

void ios_base::register_callback(event_callback __fn, int index) {

  pair<pair<event_callback, int>*, size_t> tmp

    = _Stl_expand_array(_M_callbacks, _M_num_callbacks, (int)_M_callback_index /* fbp: index ??? */ );

  if (tmp.first) {

    _M_callbacks = tmp.first;

    _M_num_callbacks = tmp.second;

    _M_callbacks[_M_callback_index++] = make_pair(__fn, index);

  }

  else {

    _M_setstate_nothrow(badbit);

    _M_check_exception_mask();

  }

}

// Invokes all currently registered callbacks for a particular event.

// Behaves correctly even if one of the callbacks adds a new callback.

void ios_base::_M_invoke_callbacks(event E) {

  for (size_t i = _M_callback_index; i > 0; --i) {

    event_callback f = _M_callbacks[i-1].first;

    int n = _M_callbacks[i-1].second;

    f(E, *this, n);

  }

}

// This function is called if the state, rdstate(), has a bit set

// that is also set in the exception mask exceptions().

void ios_base::_M_throw_failure() {

  const char* arg ;

# if 0

  char buffer[256];

  char* ptr;

  strcpy(buffer, "ios failure: rdstate = 0x");

  ptr = __write_integer(buffer+strlen(buffer), ios_base::hex, __STATIC_CAST(unsigned long,_M_iostate));

  strcpy(ptr, " mask = 0x");

  ptr = __write_integer(buffer+strlen(buffer), ios_base::hex, __STATIC_CAST(unsigned long,_M_exception_mask));

  *ptr = 0;

  arg = buffer;

# else

  arg = "ios failure";

# endif

# ifndef _STLP_USE_EXCEPTIONS

  fputs(arg, stderr);

# else

  throw failure(arg);

# endif

}

// Copy x's state to *this.  This member function is used in the

// implementation of basic_ios::copyfmt.  Does not copy _M_exception_mask

// or _M_iostate.

void ios_base::_M_copy_state(const ios_base& x) {

  _M_fmtflags  = x._M_fmtflags; // Copy the flags, except for _M_iostate

  _M_openmode  = x._M_openmode; // and _M_exception_mask.

  _M_seekdir   = x._M_seekdir;

  _M_precision = x._M_precision;

  _M_width     = x._M_width;

  _M_locale    = x._M_locale;

  if (x._M_callbacks) {

    pair<event_callback, int>* tmp = _Stl_copy_array(x._M_callbacks, x._M_callback_index);

    if (tmp) {

      free(_M_callbacks);

      _M_callbacks = tmp;

      _M_num_callbacks = _M_callback_index = x._M_callback_index;

    }

    else {

      _M_setstate_nothrow(badbit);

      _M_check_exception_mask();

    }

  }

  if (x._M_iwords) {

    long* tmp = _Stl_copy_array(x._M_iwords, x._M_num_iwords);

    if (tmp) {

      free(_M_iwords);

      _M_iwords = tmp;

      _M_num_iwords = x._M_num_iwords;

    }

    else {

      _M_setstate_nothrow(badbit);

      _M_check_exception_mask();

    }

  }

  if (x._M_pwords) {

    void** tmp = _Stl_copy_array(x._M_pwords, x._M_num_pwords);

    if (tmp) {

      free(_M_pwords);

      _M_pwords = tmp;

      _M_num_pwords = x._M_num_pwords;

    }

    else {

      _M_setstate_nothrow(badbit);

      _M_check_exception_mask();

    }

  }

}

// ios's (protected) default constructor.  The standard says that all

// fields have indeterminate values; we initialize them to zero for

// simplicity.  The only thing that really matters is that the arrays

// are all initially null pointers, and the array element counts are all

// initially zero.

ios_base::ios_base()

  : _M_fmtflags(0), _M_iostate(0), _M_openmode(0), _M_seekdir(0),

    _M_exception_mask(0),

    _M_precision(0), _M_width(0),

    _M_locale(),

    _M_callbacks(0), _M_num_callbacks(0), _M_callback_index(0),

    _M_iwords(0), _M_num_iwords(0),

    _M_pwords(0),

    _M_num_pwords(0)

{}

// ios's destructor.

ios_base::~ios_base() {

  _M_invoke_callbacks(erase_event);

  free(_M_callbacks);

  free(_M_iwords);

  free(_M_pwords);

}

//----------------------------------------------------------------------

// Force instantiation of basic_ios

// For DLL exports, they are already instantiated.

#if !defined(_STLP_NO_FORCE_INSTANTIATE)

template class _STLP_CLASS_DECLSPEC basic_ios<char, char_traits<char> >;

#  if !defined (_STLP_NO_WCHAR_T)

template class _STLP_CLASS_DECLSPEC basic_ios<wchar_t, char_traits<wchar_t> >;

#  endif /* _STLP_NO_WCHAR_T */

#endif

_STLP_END_NAMESPACE

// Local Variables:

// mode:C++

// End: