// <bitset> -*- C++ -*-
-// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
#pragma GCC system_header
-#include <cstddef> // For size_t
#include <string>
#include <bits/functexcept.h> // For invalid_argument, out_of_range,
// overflow_error
#define _GLIBCXX_BITSET_BITS_PER_WORD (__CHAR_BIT__ * sizeof(unsigned long))
#define _GLIBCXX_BITSET_WORDS(__n) \
- ((__n) < 1 ? 0 : ((__n) + _GLIBCXX_BITSET_BITS_PER_WORD - 1) \
- / _GLIBCXX_BITSET_BITS_PER_WORD)
+ ((__n) / _GLIBCXX_BITSET_BITS_PER_WORD + \
+ ((__n) % _GLIBCXX_BITSET_BITS_PER_WORD == 0 ? 0 : 1))
_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_D)
_Base_bitset()
{ _M_do_reset(); }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ _Base_bitset(unsigned long long __val)
+#else
_Base_bitset(unsigned long __val)
+#endif
{
_M_do_reset();
_M_w[0] = __val;
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ if (sizeof(unsigned long long) > sizeof(unsigned long))
+ _M_w[1] = __val >> _GLIBCXX_BITSET_BITS_PER_WORD;
+#endif
}
static size_t
_M_getword(size_t __pos) const
{ return _M_w[_S_whichword(__pos)]; }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ const _WordT*
+ _M_getdata() const
+ { return _M_w; }
+#endif
+
_WordT&
_M_hiword()
{ return _M_w[_Nw - 1]; }
unsigned long
_M_do_to_ulong() const;
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ unsigned long long
+ _M_do_to_ullong() const;
+#endif
+
// find first "on" bit
size_t
_M_do_find_first(size_t __not_found) const;
return _M_w[0];
}
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ template<size_t _Nw>
+ unsigned long long
+ _Base_bitset<_Nw>::_M_do_to_ullong() const
+ {
+ const bool __dw = sizeof(unsigned long long) > sizeof(unsigned long);
+ for (size_t __i = 1 + __dw; __i < _Nw; ++__i)
+ if (_M_w[__i])
+ __throw_overflow_error(__N("_Base_bitset::_M_do_to_ullong"));
+
+ if (__dw)
+ return _M_w[0] + (static_cast<unsigned long long>(_M_w[1])
+ << _GLIBCXX_BITSET_BITS_PER_WORD);
+ return _M_w[0];
+ }
+#endif
+
template<size_t _Nw>
size_t
_Base_bitset<_Nw>::_M_do_find_first(size_t __not_found) const
: _M_w(0)
{ }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ _Base_bitset(unsigned long long __val)
+#else
_Base_bitset(unsigned long __val)
+#endif
: _M_w(__val)
{ }
_M_getword(size_t) const
{ return _M_w; }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ const _WordT*
+ _M_getdata() const
+ { return &_M_w; }
+#endif
+
_WordT&
_M_hiword()
{ return _M_w; }
_M_do_to_ulong() const
{ return _M_w; }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ unsigned long long
+ _M_do_to_ullong() const
+ { return _M_w; }
+#endif
+
size_t
_M_do_find_first(size_t __not_found) const
{
_Base_bitset()
{ }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ _Base_bitset(unsigned long long)
+#else
_Base_bitset(unsigned long)
+#endif
{ }
static size_t
_M_do_to_ulong() const
{ return 0; }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ unsigned long long
+ _M_do_to_ullong() const
+ { return 0; }
+#endif
+
// Normally "not found" is the size, but that could also be
// misinterpreted as an index in this corner case. Oh well.
size_t
* the high-order bits in the highest word.) It is a class invariant
* that those unused bits are always zero.
*
- * If you think of %bitset as "a simple array of bits," be aware that
- * your mental picture is reversed: a %bitset behaves the same way as
- * bits in integers do, with the bit at index 0 in the "least significant
- * / right-hand" position, and the bit at index Nb-1 in the "most
- * significant / left-hand" position. Thus, unlike other containers, a
- * %bitset's index "counts from right to left," to put it very loosely.
+ * If you think of %bitset as <em>a simple array of bits</em>, be
+ * aware that your mental picture is reversed: a %bitset behaves
+ * the same way as bits in integers do, with the bit at index 0 in
+ * the <em>least significant / right-hand</em> position, and the bit at
+ * index Nb-1 in the <em>most significant / left-hand</em> position.
+ * Thus, unlike other containers, a %bitset's index <em>counts from
+ * right to left</em>, to put it very loosely.
*
* This behavior is preserved when translating to and from strings. For
* example, the first line of the following program probably prints
- * "b('a') is 0001100001" on a modern ASCII system.
+ * <em>b('a') is 0001100001</em> on a modern ASCII system.
*
* @code
* #include <bitset>
_S_do_sanitize(this->_M_hiword());
}
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ template<typename> friend class hash;
+#endif
+
public:
/**
* This encapsulates the concept of a single bit. An instance of this
* to and from bool are automatic and should be transparent. Overloaded
* operators help to preserve the illusion.
*
- * (On a typical system, this "bit %reference" is 64 times the size of
- * an actual bit. Ha.)
+ * (On a typical system, this <em>bit %reference</em> is 64
+ * times the size of an actual bit. Ha.)
*/
class reference
{
{ }
/// Initial bits bitwise-copied from a single word (others set to zero).
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ bitset(unsigned long long __val)
+#else
bitset(unsigned long __val)
+#endif
: _Base(__val)
{ _M_do_sanitize(); }
/**
* @brief Use a subset of a string.
- * @param s A string of '0' and '1' characters.
+ * @param s A string of @a 0 and @a 1 characters.
* @param position Index of the first character in @a s to use;
* defaults to zero.
* @throw std::out_of_range If @a pos is bigger the size of @a s.
* @throw std::invalid_argument If a character appears in the string
- * which is neither '0' nor '1'.
+ * which is neither @a 0 nor @a 1.
*/
template<class _CharT, class _Traits, class _Alloc>
explicit
/**
* @brief Use a subset of a string.
- * @param s A string of '0' and '1' characters.
+ * @param s A string of @a 0 and @a 1 characters.
* @param position Index of the first character in @a s to use.
* @param n The number of characters to copy.
* @throw std::out_of_range If @a pos is bigger the size of @a s.
* @throw std::invalid_argument If a character appears in the string
- * which is neither '0' nor '1'.
+ * which is neither @a 0 nor @a 1.
*/
template<class _CharT, class _Traits, class _Alloc>
bitset(const std::basic_string<_CharT, _Traits, _Alloc>& __s,
_M_copy_from_string(__s, __position, __n, __zero, __one);
}
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ /**
+ * @brief Construct from a character %array.
+ * @param str An %array of characters @a zero and @a one.
+ * @param n The number of characters to use.
+ * @param zero The character corresponding to the value 0.
+ * @param one The character corresponding to the value 1.
+ * @throw std::invalid_argument If a character appears in the string
+ * which is neither @a zero nor @a one.
+ */
+ template<typename _CharT>
+ explicit
+ bitset(const _CharT* __str,
+ typename std::basic_string<_CharT>::size_type __n
+ = std::basic_string<_CharT>::npos,
+ _CharT __zero = _CharT('0'), _CharT __one = _CharT('1'))
+ : _Base()
+ {
+ if (!__str)
+ __throw_logic_error(__N("bitset::bitset(const _CharT*, ...)"));
+
+ if (__n == std::basic_string<_CharT>::npos)
+ __n = std::char_traits<_CharT>::length(__str);
+ _M_copy_from_ptr<_CharT, std::char_traits<_CharT>>(__str, __n, 0,
+ __n, __zero,
+ __one);
+ }
+#endif
+
// 23.3.5.2 bitset operations:
//@{
/**
/**
* @brief Array-indexing support.
* @param position Index into the %bitset.
- * @return A bool for a 'const %bitset'. For non-const bitsets, an
+ * @return A bool for a <em>const %bitset</em>. For non-const bitsets, an
* instance of the reference proxy class.
* @note These operators do no range checking and throw no exceptions,
* as required by DR 11 to the standard.
to_ulong() const
{ return this->_M_do_to_ulong(); }
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ unsigned long long
+ to_ullong() const
+ { return this->_M_do_to_ullong(); }
+#endif
+
/**
* @brief Returns a character interpretation of the %bitset.
* @return The string equivalent of the bits.
* @brief Global I/O operators for bitsets.
*
* Direct I/O between streams and bitsets is supported. Output is
- * straightforward. Input will skip whitespace, only accept '0' and '1'
+ * straightforward. Input will skip whitespace, only accept @a 0 and @a 1
* characters, and will only extract as many digits as the %bitset will
* hold.
*/
#undef _GLIBCXX_BITSET_WORDS
#undef _GLIBCXX_BITSET_BITS_PER_WORD
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+
+#include <bits/functional_hash.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+ // DR 1182.
+ /// std::hash specialization for bitset.
+ template<size_t _Nb>
+ struct hash<_GLIBCXX_STD_D::bitset<_Nb>>
+ : public __hash_base<size_t, _GLIBCXX_STD_D::bitset<_Nb>>
+ {
+ size_t
+ operator()(const _GLIBCXX_STD_D::bitset<_Nb>& __b) const
+ {
+ const size_t __clength = (_Nb + __CHAR_BIT__ - 1) / __CHAR_BIT__;
+ return std::_Hash_impl::hash(__b._M_getdata(), __clength);
+ }
+ };
+
+ template<>
+ struct hash<_GLIBCXX_STD_D::bitset<0>>
+ : public __hash_base<size_t, _GLIBCXX_STD_D::bitset<0>>
+ {
+ size_t
+ operator()(const _GLIBCXX_STD_D::bitset<0>&) const
+ { return 0; }
+ };
+
+_GLIBCXX_END_NAMESPACE
+
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
#ifdef _GLIBCXX_DEBUG
# include <debug/bitset>
#endif
+#ifdef _GLIBCXX_PROFILE
+# include <profile/bitset>
+#endif
+
#endif /* _GLIBCXX_BITSET */
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