/*

  * Copyright (c) 1998

  * 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.

  *

  */

 #ifndef _STLP_BITSET_H

 #define _STLP_BITSET_H

 // A bitset of size N has N % (sizeof(unsigned long) * CHAR_BIT) unused

 // bits.  (They are the high- order bits in the highest word.)  It is

 // a class invariant of class bitset<> that those unused bits are

 // always zero.

 // Most of the actual code isn't contained in bitset<> itself, but in the

 // base class _Base_bitset.  The base class works with whole words, not with

 // individual bits.  This allows us to specialize _Base_bitset for the

 // important special case where the bitset is only a single word.

 // The C++ standard does not define the precise semantics of operator[].

 // In this implementation the const version of operator[] is equivalent

 // to test(), except that it does no range checking.  The non-const version

 // returns a reference to a bit, again without doing any range checking.

 #ifndef _STLP_INTERNAL_ALGOBASE_H

 #  include <stl/_algobase.h>

 #endif

 #ifndef _STLP_INTERNAL_ALLOC_H

 #  include <stl/_alloc.h>

 #endif

 #ifndef _STLP_INTERNAL_ITERATOR_H

 #  include <stl/_iterator.h>

 #endif

 #ifndef _STLP_INTERNAL_UNINITIALIZED_H

 #  include <stl/_uninitialized.h>

 #endif

 #ifndef _STLP_RANGE_ERRORS_H

 #  include <stl/_range_errors.h>

 #endif

 #ifndef _STLP_INTERNAL_STRING_H

 #  include <stl/_string.h>

 #endif

 #define __BITS_PER_WORD (CHAR_BIT*sizeof(unsigned long))

 #define __BITSET_WORDS(__n) ((__n + __BITS_PER_WORD - 1)/__BITS_PER_WORD)

 _STLP_BEGIN_NAMESPACE

 _STLP_MOVE_TO_PRIV_NAMESPACE

 // structure to aid in counting bits

 class _STLP_CLASS_DECLSPEC _Bs_G

 {

   public:

     //returns the number of bit set within the buffer between __beg and __end.

    #if defined (__SYMBIAN32__)

     _STLP_DECLSPEC 

 #endif 

 	  static size_t _S_count(const unsigned char *__beg, const unsigned char *__end)

 #if defined (_STLP_USE_NO_IOSTREAMS)

     {

       size_t __result = 0;

       for (; __beg != __end; ++__beg) {

         for (size_t i = 0; i < (sizeof(unsigned char) * 8); ++i) {

           if ((*__beg & (1 << i)) != 0) { ++__result; }

         }

       }

       return __result;

     }

 #else

       ;

 #endif

     // Mapping from 8 bit unsigned integers to the index of the first one bit set:

 #if defined (__SYMBIAN32__)

     _STLP_DECLSPEC 

 #endif

 	static unsigned char _S_first_one(unsigned char __x)

 #if defined (_STLP_USE_NO_IOSTREAMS)

     {

       for (unsigned char i = 0; i < (sizeof(unsigned char) * 8); ++i) {

         if ((__x & (1 << i)) != 0) { return i; }

       }

       return 0;

     }

 #else

       ;

 #endif

 };

 //

 // Base class: general case.

 //

 template<size_t _Nw>

 struct _Base_bitset {

   typedef unsigned long _WordT;

   _WordT _M_w[_Nw];                // 0 is the least significant word.

   _Base_bitset() { _M_do_reset(); }

   _Base_bitset(unsigned long __val) {

     _M_do_reset();

     _M_w[0] = __val;

   }

   static size_t _STLP_CALL _S_whichword( size_t __pos ) {

     return __pos / __BITS_PER_WORD;

   }

   static size_t _STLP_CALL _S_whichbyte( size_t __pos ) {

     return (__pos % __BITS_PER_WORD) / CHAR_BIT;

   }

   static size_t _STLP_CALL _S_whichbit( size_t __pos ) {

     return __pos % __BITS_PER_WORD;

   }

   static _WordT _STLP_CALL _S_maskbit( size_t __pos ) {

     return __STATIC_CAST(_WordT,1) << _S_whichbit(__pos);

   }

   _WordT& _M_getword(size_t __pos)       { return _M_w[_S_whichword(__pos)]; }

   _WordT  _M_getword(size_t __pos) const { return _M_w[_S_whichword(__pos)]; }

   _WordT& _M_hiword()       { return _M_w[_Nw - 1]; }

   _WordT  _M_hiword() const { return _M_w[_Nw - 1]; }

   void _M_do_and(const _Base_bitset<_Nw>& __x) {

     for ( size_t __i = 0; __i < _Nw; __i++ ) {

       _M_w[__i] &= __x._M_w[__i];

     }

   }

   void _M_do_or(const _Base_bitset<_Nw>& __x) {

     for ( size_t __i = 0; __i < _Nw; __i++ ) {

       _M_w[__i] |= __x._M_w[__i];

     }

   }

   void _M_do_xor(const _Base_bitset<_Nw>& __x) {

     for ( size_t __i = 0; __i < _Nw; __i++ ) {

       _M_w[__i] ^= __x._M_w[__i];

     }

   }

   void _M_do_left_shift(size_t __shift);

   void _M_do_right_shift(size_t __shift);

   void _M_do_flip() {

     for ( size_t __i = 0; __i < _Nw; __i++ ) {

       _M_w[__i] = ~_M_w[__i];

     }

   }

   void _M_do_set() {

     for ( size_t __i = 0; __i < _Nw; __i++ ) {

       _M_w[__i] = ~__STATIC_CAST(_WordT,0);

     }

   }

   void _M_do_reset() { memset(_M_w, 0, _Nw * sizeof(_WordT)); }

   bool _M_is_equal(const _Base_bitset<_Nw>& __x) const {

     for (size_t __i = 0; __i < _Nw; ++__i) {

       if (_M_w[__i] != __x._M_w[__i])

         return false;

     }

     return true;

   }

   bool _M_is_any() const {

     for ( size_t __i = 0; __i < _Nw ; __i++ ) {

       if ( _M_w[__i] != __STATIC_CAST(_WordT,0) )

         return true;

     }

     return false;

   }

   size_t _M_do_count() const {

     const unsigned char* __byte_ptr = (const unsigned char*)_M_w;

     const unsigned char* __end_ptr = (const unsigned char*)(_M_w+_Nw);

     return _Bs_G::_S_count(__byte_ptr, __end_ptr);

   }

   unsigned long _M_do_to_ulong() const;

   // find first "on" bit

   size_t _M_do_find_first(size_t __not_found) const;

   // find the next "on" bit that follows "prev"

   size_t _M_do_find_next(size_t __prev, size_t __not_found) const;

 };

 //

 // Base class: specialization for a single word.

 //

 _STLP_TEMPLATE_NULL

 struct _Base_bitset<1UL> {

   typedef unsigned long _WordT;

   typedef _Base_bitset<1UL> _Self;

   _WordT _M_w;

   _Base_bitset( void ) : _M_w(0) {}

   _Base_bitset(unsigned long __val) : _M_w(__val) {}

   static size_t _STLP_CALL _S_whichword( size_t __pos ) {

     return __pos / __BITS_PER_WORD ;

   }

   static size_t _STLP_CALL _S_whichbyte( size_t __pos ) {

     return (__pos % __BITS_PER_WORD) / CHAR_BIT;

   }

   static size_t _STLP_CALL _S_whichbit( size_t __pos ) {

     return __pos % __BITS_PER_WORD;

   }

   static _WordT _STLP_CALL _S_maskbit( size_t __pos ) {

     return (__STATIC_CAST(_WordT,1)) << _S_whichbit(__pos);

   }

   _WordT& _M_getword(size_t)       { return _M_w; }

   _WordT  _M_getword(size_t) const { return _M_w; }

   _WordT& _M_hiword()       { return _M_w; }

   _WordT  _M_hiword() const { return _M_w; }

   void _M_do_and(const _Self& __x) { _M_w &= __x._M_w; }

   void _M_do_or(const _Self& __x)  { _M_w |= __x._M_w; }

   void _M_do_xor(const _Self& __x) { _M_w ^= __x._M_w; }

   void _M_do_left_shift(size_t __shift)     { _M_w <<= __shift; }

   void _M_do_right_shift(size_t __shift)    { _M_w >>= __shift; }

   void _M_do_flip()                       { _M_w = ~_M_w; }

   void _M_do_set()                        { _M_w = ~__STATIC_CAST(_WordT,0); }

   void _M_do_reset()                      { _M_w = 0; }

   bool _M_is_equal(const _Self& __x) const {

     return _M_w == __x._M_w;

   }

   bool _M_is_any() const {

     return _M_w != 0;

   }

   size_t _M_do_count() const {

     const unsigned char* __byte_ptr = (const unsigned char*)&_M_w;

     const unsigned char* __end_ptr = ((const unsigned char*)&_M_w)+sizeof(_M_w);

     return _Bs_G::_S_count(__byte_ptr, __end_ptr);

   }

   unsigned long _M_do_to_ulong() const { return _M_w; }

   inline size_t _M_do_find_first(size_t __not_found) const;

   // find the next "on" bit that follows "prev"

   inline size_t _M_do_find_next(size_t __prev, size_t __not_found) const;

 };

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

 //

 // Definitions of should-be-non-inline functions from the single-word version of

 //  _Base_bitset.

 //

 inline size_t

 _Base_bitset<1UL>::_M_do_find_first(size_t __not_found) const {

   //  typedef unsigned long _WordT;

   _WordT __thisword = _M_w;

   if ( __thisword != __STATIC_CAST(_WordT,0) ) {

     // find byte within word

     for ( size_t __j = 0; __j < sizeof(_WordT); __j++ ) {

       unsigned char __this_byte

         = __STATIC_CAST(unsigned char,(__thisword & (~(unsigned char)0)));

       if ( __this_byte )

         return __j*CHAR_BIT + _Bs_G::_S_first_one(__this_byte);

       __thisword >>= CHAR_BIT;

     }

   }

   // not found, so return a value that indicates failure.

   return __not_found;

 }

 inline size_t

 _Base_bitset<1UL>::_M_do_find_next(size_t __prev,

                                    size_t __not_found ) const {

   // make bound inclusive

   ++__prev;

   // check out of bounds

   if ( __prev >= __BITS_PER_WORD )

     return __not_found;

     // search first (and only) word

   _WordT __thisword = _M_w;

   // mask off bits below bound

   __thisword &= (~__STATIC_CAST(_WordT,0)) << _S_whichbit(__prev);

   if ( __thisword != __STATIC_CAST(_WordT,0) ) {

     // find byte within word

     // get first byte into place

     __thisword >>= _S_whichbyte(__prev) * CHAR_BIT;

     for ( size_t __j = _S_whichbyte(__prev); __j < sizeof(_WordT); __j++ ) {

       unsigned char __this_byte

         = __STATIC_CAST(unsigned char,(__thisword & (~(unsigned char)0)));

       if ( __this_byte )

         return __j*CHAR_BIT + _Bs_G::_S_first_one(__this_byte);

       __thisword >>= CHAR_BIT;

     }

   }

   // not found, so return a value that indicates failure.

   return __not_found;

 } // end _M_do_find_next

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

 // Helper class to zero out the unused high-order bits in the highest word.

 template <size_t _Extrabits> struct _Sanitize {

   static void _STLP_CALL _M_do_sanitize(unsigned long& __val)

   { __val &= ~((~__STATIC_CAST(unsigned long,0)) << _Extrabits); }

 };

 _STLP_TEMPLATE_NULL struct _Sanitize<0UL> {

   static void _STLP_CALL _M_do_sanitize(unsigned long) {}

 };

 _STLP_MOVE_TO_STD_NAMESPACE

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

 // Class bitset.

 //   _Nb may be any nonzero number of type size_t.

 template<size_t _Nb>

 class bitset : public _STLP_PRIV _Base_bitset<__BITSET_WORDS(_Nb) > {

 public:

   enum { _Words = __BITSET_WORDS(_Nb) } ;

 private:

   typedef _STLP_PRIV _Base_bitset< _Words > _Base;

   void _M_do_sanitize() {

     _STLP_PRIV _Sanitize<_Nb%__BITS_PER_WORD >::_M_do_sanitize(this->_M_hiword());

   }

 public:

   typedef unsigned long _WordT;

   struct reference;

   friend struct reference;

   // bit reference:

   struct reference {

   typedef _STLP_PRIV _Base_bitset<_Words > _Bitset_base;

   typedef bitset<_Nb> _Bitset;

     //    friend _Bitset;

     _WordT *_M_wp;

     size_t _M_bpos;

     // should be left undefined

     reference() {}

     reference( _Bitset& __b, size_t __pos ) {

       _M_wp = &__b._M_getword(__pos);

       _M_bpos = _Bitset_base::_S_whichbit(__pos);

     }

   public:

     ~reference() {}

     // for b[i] = __x;

     reference& operator=(bool __x) {

       if ( __x )

         *_M_wp |= _Bitset_base::_S_maskbit(_M_bpos);

       else

         *_M_wp &= ~_Bitset_base::_S_maskbit(_M_bpos);

       return *this;

     }

     // for b[i] = b[__j];

     reference& operator=(const reference& __j) {

       if ( (*(__j._M_wp) & _Bitset_base::_S_maskbit(__j._M_bpos)) )

         *_M_wp |= _Bitset_base::_S_maskbit(_M_bpos);

       else

         *_M_wp &= ~_Bitset_base::_S_maskbit(_M_bpos);

       return *this;

     }

     // flips the bit

     bool operator~() const { return (*(_M_wp) & _Bitset_base::_S_maskbit(_M_bpos)) == 0; }

     // for __x = b[i];

     operator bool() const { return (*(_M_wp) & _Bitset_base::_S_maskbit(_M_bpos)) != 0; }

     // for b[i].flip();

     reference& flip() {

       *_M_wp ^= _Bitset_base::_S_maskbit(_M_bpos);

       return *this;

     }

   };

   // 23.3.5.1 constructors:

   bitset() {}

   bitset(unsigned long __val) : _STLP_PRIV _Base_bitset<_Words>(__val) { _M_do_sanitize(); }

 #if defined (_STLP_MEMBER_TEMPLATES)

   template<class _CharT, class _Traits, class _Alloc>

   explicit bitset(const basic_string<_CharT,_Traits,_Alloc>& __s,

                   size_t __pos = 0)

     : _STLP_PRIV _Base_bitset<_Words >() {

     if (__pos > __s.size())

       __stl_throw_out_of_range("bitset");

     _M_copy_from_string(__s, __pos,

                         basic_string<_CharT, _Traits, _Alloc>::npos);

   }

   template<class _CharT, class _Traits, class _Alloc>

   bitset(const basic_string<_CharT, _Traits, _Alloc>& __s,

           size_t __pos,

           size_t __n)

   : _STLP_PRIV _Base_bitset<_Words >() {

     if (__pos > __s.size())

       __stl_throw_out_of_range("bitset");

     _M_copy_from_string(__s, __pos, __n);

   }

 #else /* _STLP_MEMBER_TEMPLATES */

   explicit bitset(const string& __s,

                   size_t __pos = 0,

                   size_t __n = (size_t)-1)

     : _STLP_PRIV _Base_bitset<_Words >() {

     if (__pos > __s.size())

       __stl_throw_out_of_range("bitset");

     _M_copy_from_string(__s, __pos, __n);

   }

 #endif /* _STLP_MEMBER_TEMPLATES */

   // 23.3.5.2 bitset operations:

   bitset<_Nb>& operator&=(const bitset<_Nb>& __rhs) {

     this->_M_do_and(__rhs);

     return *this;

   }

   bitset<_Nb>& operator|=(const bitset<_Nb>& __rhs) {

     this->_M_do_or(__rhs);

     return *this;

   }

   bitset<_Nb>& operator^=(const bitset<_Nb>& __rhs) {

     this->_M_do_xor(__rhs);

     return *this;

   }

   bitset<_Nb>& operator<<=(size_t __pos) {

     this->_M_do_left_shift(__pos);

     this->_M_do_sanitize();

     return *this;

   }

   bitset<_Nb>& operator>>=(size_t __pos) {

     this->_M_do_right_shift(__pos);

     this->_M_do_sanitize();

     return *this;

   }

   //

   // Extension:

   // Versions of single-bit set, reset, flip, test with no range checking.

   //

   bitset<_Nb>& _Unchecked_set(size_t __pos) {

     this->_M_getword(__pos) |= _STLP_PRIV _Base_bitset<_Words > ::_S_maskbit(__pos);

     return *this;

   }

   bitset<_Nb>& _Unchecked_set(size_t __pos, int __val) {

     if (__val)

       this->_M_getword(__pos) |= this->_S_maskbit(__pos);

     else

       this->_M_getword(__pos) &= ~ this->_S_maskbit(__pos);

     return *this;

   }

   bitset<_Nb>& _Unchecked_reset(size_t __pos) {

     this->_M_getword(__pos) &= ~ this->_S_maskbit(__pos);

     return *this;

   }

   bitset<_Nb>& _Unchecked_flip(size_t __pos) {

     this->_M_getword(__pos) ^= this->_S_maskbit(__pos);

     return *this;

   }

   bool _Unchecked_test(size_t __pos) const {

     return (this->_M_getword(__pos) & this->_S_maskbit(__pos)) != __STATIC_CAST(_WordT,0);

   }

   // Set, reset, and flip.

   bitset<_Nb>& set() {

     this->_M_do_set();

     this->_M_do_sanitize();

     return *this;

   }

   bitset<_Nb>& set(size_t __pos) {

     if (__pos >= _Nb)

       __stl_throw_out_of_range("bitset");

     return _Unchecked_set(__pos);

   }

   bitset<_Nb>& set(size_t __pos, int __val) {

     if (__pos >= _Nb)

       __stl_throw_out_of_range("bitset");

     return _Unchecked_set(__pos, __val);

   }

   bitset<_Nb>& reset() {

     this->_M_do_reset();

     return *this;

   }

   bitset<_Nb>& reset(size_t __pos) {

     if (__pos >= _Nb)

       __stl_throw_out_of_range("bitset");

     return _Unchecked_reset(__pos);

   }

   bitset<_Nb>& flip() {

     this->_M_do_flip();

     this->_M_do_sanitize();

     return *this;

   }

   bitset<_Nb>& flip(size_t __pos) {

     if (__pos >= _Nb)

       __stl_throw_out_of_range("bitset");

     return _Unchecked_flip(__pos);

   }

   bitset<_Nb> operator~() const {

     return bitset<_Nb>(*this).flip();

   }

   // element access:

   //for b[i];

   reference operator[](size_t __pos) { return reference(*this,__pos); }

   bool operator[](size_t __pos) const { return _Unchecked_test(__pos); }

   unsigned long to_ulong() const { return this->_M_do_to_ulong(); }

 #if defined (_STLP_MEMBER_TEMPLATES) && !defined (_STLP_NO_EXPLICIT_FUNCTION_TMPL_ARGS)

   template <class _CharT, class _Traits, class _Alloc>

   basic_string<_CharT, _Traits, _Alloc> to_string() const {

     basic_string<_CharT, _Traits, _Alloc> __result;

     _M_copy_to_string(__result);

     return __result;

   }

 #else

   string to_string() const {

     string __result;

     _M_copy_to_string(__result);

     return __result;

   }

 #endif /* _STLP_EXPLICIT_FUNCTION_TMPL_ARGS */

   size_t count() const { return this->_M_do_count(); }

   size_t size() const { return _Nb; }

   bool operator==(const bitset<_Nb>& __rhs) const {

     return this->_M_is_equal(__rhs);

   }

   bool operator!=(const bitset<_Nb>& __rhs) const {

     return !this->_M_is_equal(__rhs);

   }

   bool test(size_t __pos) const {

     if (__pos >= _Nb)

       __stl_throw_out_of_range("bitset");

     return _Unchecked_test(__pos);

   }

   bool any() const { return this->_M_is_any(); }

   bool none() const { return !this->_M_is_any(); }

   bitset<_Nb> operator<<(size_t __pos) const {

     bitset<_Nb> __result(*this);

     __result <<= __pos ;  return __result;

   }

   bitset<_Nb> operator>>(size_t __pos) const {

     bitset<_Nb> __result(*this);

     __result >>= __pos ;  return __result;

   }

 #if !defined (_STLP_NO_EXTENSIONS)

   //

   // EXTENSIONS: bit-find operations.  These operations are

   // experimental, and are subject to change or removal in future

   // versions.

   //

   // find the index of the first "on" bit

   size_t _Find_first() const

     { return this->_M_do_find_first(_Nb); }

   // find the index of the next "on" bit after prev

   size_t _Find_next( size_t __prev ) const

     { return this->_M_do_find_next(__prev, _Nb); }

 #endif

 //

 // Definitions of should-be non-inline member functions.

 //

 #if defined (_STLP_MEMBER_TEMPLATES)

   template<class _CharT, class _Traits, class _Alloc>

   void _M_copy_from_string(const basic_string<_CharT,_Traits,_Alloc>& __s,

                            size_t __pos, size_t __n) {

 #else

   void _M_copy_from_string(const string& __s,

                            size_t __pos, size_t __n) {

     typedef typename string::traits_type _Traits;

 #endif

     reset();

     size_t __tmp = _Nb;

     const size_t __Nbits = (min) (__tmp, (min) (__n, __s.size() - __pos));

     for ( size_t __i= 0; __i < __Nbits; ++__i) {

       typename _Traits::int_type __k = _Traits::to_int_type(__s[__pos + __Nbits - __i - 1]);

       // boris : widen() ?

       if (__k == '1')

         set(__i);

       else if (__k != '0')

         __stl_throw_invalid_argument("bitset");

     }

   }

 #if defined (_STLP_MEMBER_TEMPLATES)

   template <class _CharT, class _Traits, class _Alloc>

   void _M_copy_to_string(basic_string<_CharT, _Traits, _Alloc>& __s) const

 #else

   void _M_copy_to_string(string& __s) const

 #endif

   {

     __s.assign(_Nb, '0');

     for (size_t __i = 0; __i < _Nb; ++__i) {

       if (_Unchecked_test(__i))

         __s[_Nb - 1 - __i] = '1';

     }

   }

 #if !defined (_STLP_MEMBER_TEMPLATES) && !defined (_STLP_NO_WCHAR_T)

   void _M_copy_to_string(wstring& __s) const {

     __s.assign(_Nb, '0');

     for (size_t __i = 0; __i < _Nb; ++__i) {

       if (_Unchecked_test(__i))

         __s[_Nb - 1 - __i] = '1';

     }

   }

 #endif

 #if defined (_STLP_NON_TYPE_TMPL_PARAM_BUG)

   bitset<_Nb> operator&(const bitset<_Nb>& __y) const {

     bitset<_Nb> __result(*this);

     __result &= __y;

     return __result;

   }

   bitset<_Nb> operator|(const bitset<_Nb>& __y) const {

     bitset<_Nb> __result(*this);

     __result |= __y;

     return __result;

   }

   bitset<_Nb> operator^(const bitset<_Nb>& __y) const {

     bitset<_Nb> __result(*this);

     __result ^= __y;

     return __result;

   }

 #endif

 };

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

 //

 // 23.3.5.3 bitset operations:

 //

 #if ! defined (_STLP_NON_TYPE_TMPL_PARAM_BUG)

 template <size_t _Nb>

 inline bitset<_Nb>  _STLP_CALL

 operator&(const bitset<_Nb>& __x,

           const bitset<_Nb>& __y) {

   bitset<_Nb> __result(__x);

   __result &= __y;

   return __result;

 }

 template <size_t _Nb>

 inline bitset<_Nb>  _STLP_CALL

 operator|(const bitset<_Nb>& __x,

           const bitset<_Nb>& __y) {

   bitset<_Nb> __result(__x);

   __result |= __y;

   return __result;

 }

 template <size_t _Nb>

 inline bitset<_Nb>  _STLP_CALL

 operator^(const bitset<_Nb>& __x,

           const bitset<_Nb>& __y) {

   bitset<_Nb> __result(__x);

   __result ^= __y;

   return __result;

 }

 #if !defined (_STLP_USE_NO_IOSTREAMS)

 _STLP_END_NAMESPACE

 #  if !(defined (_STLP_MSVC) && (_STLP_MSVC < 1300)) && \

       !(defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x500))

 #ifndef _STLP_INTERNAL_IOSFWD

 #  include <stl/_iosfwd.h>

 #endif

 _STLP_BEGIN_NAMESPACE

 template <class _CharT, class _Traits, size_t _Nb>

 basic_istream<_CharT, _Traits>&  _STLP_CALL

 operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x);

 template <class _CharT, class _Traits, size_t _Nb>

 basic_ostream<_CharT, _Traits>& _STLP_CALL

 operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Nb>& __x);

 #  else

 #ifndef _STLP_STRING_IO_H

 #  include <stl/_string_io.h> //includes _istream.h and _ostream.h

 #endif

 _STLP_BEGIN_NAMESPACE

 template <size_t _Nb>

 istream&  _STLP_CALL

 operator>>(istream& __is, bitset<_Nb>& __x) {

   typedef typename string::traits_type _Traits;

   string __tmp;

   __tmp.reserve(_Nb);

   // Skip whitespace

   typename istream::sentry __sentry(__is);

   if (__sentry) {

     streambuf* __buf = __is.rdbuf();

     for (size_t __i = 0; __i < _Nb; ++__i) {

       static typename _Traits::int_type __eof = _Traits::eof();

       typename _Traits::int_type __c1 = __buf->sbumpc();

       if (_Traits::eq_int_type(__c1, __eof)) {

         __is.setstate(ios_base::eofbit);

         break;

       }

       else {

         typename _Traits::char_type __c2 = _Traits::to_char_type(__c1);

         char __c  = __is.narrow(__c2, '*');

         if (__c == '0' || __c == '1')

           __tmp.push_back(__c);

         else if (_Traits::eq_int_type(__buf->sputbackc(__c2), __eof)) {

           __is.setstate(ios_base::failbit);

           break;

         }

       }

     }

     if (__tmp.empty())

       __is.setstate(ios_base::failbit);

     else

       __x._M_copy_from_string(__tmp, __STATIC_CAST(size_t,0), _Nb);

   }

   return __is;

 }

 template <size_t _Nb>

 ostream& _STLP_CALL

 operator<<(ostream& __os, const bitset<_Nb>& __x) {

   string __tmp;

   __x._M_copy_to_string(__tmp);

   return __os << __tmp;

 }

 #    if !defined (_STLP_NO_WCHAR_T)

 template <size_t _Nb>

 wistream&  _STLP_CALL

 operator>>(wistream& __is, bitset<_Nb>& __x) {

   typedef typename wstring::traits_type _Traits;

   wstring __tmp;

   __tmp.reserve(_Nb);

   // Skip whitespace

   typename wistream::sentry __sentry(__is);

   if (__sentry) {

     wstreambuf* __buf = __is.rdbuf();

     for (size_t __i = 0; __i < _Nb; ++__i) {

       static typename _Traits::int_type __eof = _Traits::eof();

       typename _Traits::int_type __c1 = __buf->sbumpc();

       if (_Traits::eq_int_type(__c1, __eof)) {

         __is.setstate(ios_base::eofbit);

         break;

       }

       else {

         typename _Traits::char_type __c2 = _Traits::to_char_type(__c1);

         char __c  = __is.narrow(__c2, '*');

         if (__c == '0' || __c == '1')

           __tmp.push_back(__c);

         else if (_Traits::eq_int_type(__buf->sputbackc(__c2), __eof)) {

           __is.setstate(ios_base::failbit);

           break;

         }

       }

     }

     if (__tmp.empty())

       __is.setstate(ios_base::failbit);

     else

       __x._M_copy_from_string(__tmp, __STATIC_CAST(size_t,0), _Nb);

   }

   return __is;

 }

 template <size_t _Nb>

 wostream& _STLP_CALL

 operator<<(wostream& __os, const bitset<_Nb>& __x) {

   wstring __tmp;

   __x._M_copy_to_string(__tmp);

   return __os << __tmp;

 }

 #    endif /* _STLP_NO_WCHAR_T */

 #  endif

 #endif

 #endif /* _STLP_NON_TYPE_TMPL_PARAM_BUG */

 #undef  bitset

 _STLP_END_NAMESPACE

 #undef __BITS_PER_WORD

 #undef __BITSET_WORDS

 #if !defined (_STLP_LINK_TIME_INSTANTIATION)

 #  include <stl/_bitset.c>

 #endif

 #endif /* _STLP_BITSET_H */

 // Local Variables:

 // mode:C++

 // End: