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 /*

  * 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

 #ifdef _STLP_USE_EXCEPTIONS

 // 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 {}

 #endif

 #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: