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gcc/libstdc++/stl/bitset
Jason Merrill 768a887ca7 Initial revision 
From-SVN: r22179
1998-09-02 08:33:33 -04:00

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/*
* Copyright (c) 1998
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
#ifndef __SGI_STL_BITSET
#define __SGI_STL_BITSET
// This implementation of bitset<> has a second template parameter,
// _WordT, which defaults to unsigned long. *YOU SHOULD NOT USE
// THIS FEATURE*. It is experimental, and it may be removed in
// future releases.
// A bitset of size N, using words of type _WordT, will have
// N % (sizeof(_WordT) * 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.
#include <stddef.h> // for size_t
#include <string>
#include <stdexcept> // for invalid_argument, out_of_range, overflow_error
#include <iostream.h> // for istream, ostream
#define __BITS_PER_WORDT(__wt) (CHAR_BIT*sizeof(__wt))
#define __BITSET_WORDS(__n,__wt) \
((__n) < 1 ? 1 : ((__n) + __BITS_PER_WORDT(__wt) - 1)/__BITS_PER_WORDT(__wt))
__STL_BEGIN_NAMESPACE
#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma set woff 1209
#endif
// structure to aid in counting bits
template<bool __dummy>
struct _Bit_count {
static unsigned char _S_bit_count[256];
};
// Mapping from 8 bit unsigned integers to the index of the first one
// bit:
template<bool __dummy>
struct _First_one {
static unsigned char _S_first_one[256];
};
//
// Base class: general case.
//
template<size_t _Nw, class _WordT>
struct _Base_bitset {
_WordT _M_w[_Nw]; // 0 is the least significant word.
_Base_bitset( void ) { _M_do_reset(); }
_Base_bitset(unsigned long __val);
static size_t _S_whichword( size_t __pos ) {
return __pos / __BITS_PER_WORDT(_WordT);
}
static size_t _S_whichbyte( size_t __pos ) {
return (__pos % __BITS_PER_WORDT(_WordT)) / CHAR_BIT;
}
static size_t _S_whichbit( size_t __pos ) {
return __pos % __BITS_PER_WORDT(_WordT);
}
static _WordT _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,_WordT>& __x) {
for ( size_t __i = 0; __i < _Nw; __i++ ) {
_M_w[__i] &= __x._M_w[__i];
}
}
void _M_do_or(const _Base_bitset<_Nw,_WordT>& __x) {
for ( size_t __i = 0; __i < _Nw; __i++ ) {
_M_w[__i] |= __x._M_w[__i];
}
}
void _M_do_xor(const _Base_bitset<_Nw,_WordT>& __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() {
for ( size_t __i = 0; __i < _Nw; __i++ ) {
_M_w[__i] = 0;
}
}
bool _M_is_equal(const _Base_bitset<_Nw,_WordT>& __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 < __BITSET_WORDS(_Nw,_WordT); __i++ ) {
if ( _M_w[__i] != static_cast<_WordT>(0) )
return true;
}
return false;
}
size_t _M_do_count() const {
size_t __result = 0;
const unsigned char* __byte_ptr = (const unsigned char*)_M_w;
const unsigned char* __end_ptr = (const unsigned char*)(_M_w+_Nw);
while ( __byte_ptr < __end_ptr ) {
__result += _Bit_count<true>::_S_bit_count[*__byte_ptr];
__byte_ptr++;
}
return __result;
}
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;
};
//
// Definitions of non-inline functions from _Base_bitset.
//
template<size_t _Nw, class _WordT>
_Base_bitset<_Nw, _WordT>::_Base_bitset(unsigned long __val)
{
_M_do_reset();
const size_t __n = min(sizeof(unsigned long)*CHAR_BIT,
__BITS_PER_WORDT(_WordT)*_Nw);
for(size_t __i = 0; __i < __n; ++__i, __val >>= 1)
if ( __val & 0x1 )
_M_getword(__i) |= _S_maskbit(__i);
}
template<size_t _Nw, class _WordT>
void _Base_bitset<_Nw, _WordT>::_M_do_left_shift(size_t __shift)
{
if (__shift != 0) {
const size_t __wshift = __shift / __BITS_PER_WORDT(_WordT);
const size_t __offset = __shift % __BITS_PER_WORDT(_WordT);
const size_t __sub_offset = __BITS_PER_WORDT(_WordT) - __offset;
size_t __n = _Nw - 1;
for ( ; __n > __wshift; --__n)
_M_w[__n] = (_M_w[__n - __wshift] << __offset) |
(_M_w[__n - __wshift - 1] >> __sub_offset);
if (__n == __wshift)
_M_w[__n] = _M_w[0] << __offset;
for (size_t __n1 = 0; __n1 < __n; ++__n1)
_M_w[__n1] = static_cast<_WordT>(0);
}
}
template<size_t _Nw, class _WordT>
void _Base_bitset<_Nw, _WordT>::_M_do_right_shift(size_t __shift)
{
if (__shift != 0) {
const size_t __wshift = __shift / __BITS_PER_WORDT(_WordT);
const size_t __offset = __shift % __BITS_PER_WORDT(_WordT);
const size_t __sub_offset = __BITS_PER_WORDT(_WordT) - __offset;
const size_t __limit = _Nw - __wshift - 1;
size_t __n = 0;
for ( ; __n < __limit; ++__n)
_M_w[__n] = (_M_w[__n + __wshift] >> __offset) |
(_M_w[__n + __wshift + 1] << __sub_offset);
_M_w[__limit] = _M_w[_Nw-1] >> __offset;
for (size_t __n1 = __limit + 1; __n1 < _Nw; ++__n1)
_M_w[__n1] = static_cast<_WordT>(0);
}
}
template<size_t _Nw, class _WordT>
unsigned long _Base_bitset<_Nw, _WordT>::_M_do_to_ulong() const
{
const overflow_error __overflow("bitset");
if (sizeof(_WordT) >= sizeof(unsigned long)) {
for (size_t __i = 1; __i < _Nw; ++__i)
if (_M_w[__i])
__STL_THROW(__overflow);
const _WordT __mask = static_cast<_WordT>(static_cast<unsigned long>(-1));
if (_M_w[0] & ~__mask)
__STL_THROW(__overflow);
return static_cast<unsigned long>(_M_w[0] & __mask);
}
else { // sizeof(_WordT) < sizeof(unsigned long).
const size_t __nwords =
(sizeof(unsigned long) + sizeof(_WordT) - 1) / sizeof(_WordT);
size_t __min_nwords = __nwords;
if (_Nw > __nwords) {
for (size_t __i = __nwords; __i < _Nw; ++__i)
if (_M_w[__i])
__STL_THROW(__overflow);
}
else
__min_nwords = _Nw;
// If unsigned long is 8 bytes and _WordT is 6 bytes, then an unsigned
// long consists of all of one word plus 2 bytes from another word.
const size_t __part = sizeof(unsigned long) % sizeof(_WordT);
if (__part != 0 && __nwords <= _Nw &&
(_M_w[__min_nwords - 1] >> ((sizeof(_WordT) - __part) * CHAR_BIT)) != 0)
__STL_THROW(__overflow);
unsigned long __result = 0;
for (size_t __i = 0; __i < __min_nwords; ++__i) {
__result |= static_cast<unsigned long>(
_M_w[__i]) << (__i * sizeof(_WordT) * CHAR_BIT);
}
return __result;
}
} // End _M_do_to_ulong
template<size_t _Nw, class _WordT>
size_t _Base_bitset<_Nw, _WordT>::_M_do_find_first(size_t __not_found) const
{
for ( size_t __i = 0; __i < _Nw; __i++ ) {
_WordT __thisword = _M_w[__i];
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 __i*__BITS_PER_WORDT(_WordT) + __j*CHAR_BIT +
_First_one<true>::_S_first_one[__this_byte];
__thisword >>= CHAR_BIT;
}
}
}
// not found, so return an indication of failure.
return __not_found;
}
template<size_t _Nw, class _WordT>
size_t
_Base_bitset<_Nw, _WordT>::_M_do_find_next(size_t __prev,
size_t __not_found) const
{
// make bound inclusive
++__prev;
// check out of bounds
if ( __prev >= _Nw * __BITS_PER_WORDT(_WordT) )
return __not_found;
// search first word
size_t __i = _S_whichword(__prev);
_WordT __thisword = _M_w[__i];
// 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 __i*__BITS_PER_WORDT(_WordT) + __j*CHAR_BIT +
_First_one<true>::_S_first_one[__this_byte];
__thisword >>= CHAR_BIT;
}
}
// check subsequent words
__i++;
for ( ; __i < _Nw; __i++ ) {
_WordT __thisword = _M_w[__i];
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 __i*__BITS_PER_WORDT(_WordT) + __j*CHAR_BIT +
_First_one<true>::_S_first_one[__this_byte];
__thisword >>= CHAR_BIT;
}
}
}
// not found, so return an indication of failure.
return __not_found;
} // end _M_do_find_next
// ------------------------------------------------------------
//
// Base class: specialization for a single word.
//
template<class _WordT>
struct _Base_bitset<1, _WordT> {
_WordT _M_w;
_Base_bitset( void ) { _M_do_reset(); }
_Base_bitset(unsigned long __val);
static size_t _S_whichword( size_t __pos ) {
return __pos / __BITS_PER_WORDT(_WordT);
}
static size_t _S_whichbyte( size_t __pos ) {
return (__pos % __BITS_PER_WORDT(_WordT)) / CHAR_BIT;
}
static size_t _S_whichbit( size_t __pos ) {
return __pos % __BITS_PER_WORDT(_WordT);
}
static _WordT _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 _Base_bitset<1,_WordT>& __x) { _M_w &= __x._M_w; }
void _M_do_or(const _Base_bitset<1,_WordT>& __x) { _M_w |= __x._M_w; }
void _M_do_xor(const _Base_bitset<1,_WordT>& __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 _Base_bitset<1,_WordT>& __x) const {
return _M_w == __x._M_w;
}
bool _M_is_any() const {
return _M_w != 0;
}
size_t _M_do_count() const {
size_t __result = 0;
const unsigned char* __byte_ptr = (const unsigned char*)&_M_w;
const unsigned char* __end_ptr = ((const unsigned char*)&_M_w)+sizeof(_M_w);
while ( __byte_ptr < __end_ptr ) {
__result += _Bit_count<true>::_S_bit_count[*__byte_ptr];
__byte_ptr++;
}
return __result;
}
unsigned long _M_do_to_ulong() const {
if (sizeof(_WordT) <= sizeof(unsigned long))
return static_cast<unsigned long>(_M_w);
else {
const _WordT __mask = static_cast<_WordT>(static_cast<unsigned long>(-1));
if (_M_w & ~__mask)
__STL_THROW(overflow_error("bitset"));
return static_cast<unsigned long>(_M_w);
}
}
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;
};
//
// Definitions of non-inline functions from the single-word version of
// _Base_bitset.
//
template <class _WordT>
_Base_bitset<1, _WordT>::_Base_bitset(unsigned long __val)
{
_M_do_reset();
const size_t __n = min(sizeof(unsigned long)*CHAR_BIT,
__BITS_PER_WORDT(_WordT)*_Nw);
for(size_t __i = 0; __i < __n; ++__i, __val >>= 1)
if ( __val & 0x1 )
_M_w |= _S_maskbit(__i);
}
template <class _WordT>
size_t _Base_bitset<1, _WordT>::_M_do_find_first(size_t __not_found) const
{
_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 + _First_one<true>::_S_first_one[__this_byte];
__thisword >>= CHAR_BIT;
}
}
// not found, so return a value that indicates failure.
return __not_found;
}
template <class _WordT>
size_t
_Base_bitset<1, _WordT>::_M_do_find_next(size_t __prev,
size_t __not_found ) const
{
// make bound inclusive
++__prev;
// check out of bounds
if ( __prev >= __BITS_PER_WORDT(_WordT) )
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 + _First_one<true>::_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
//
// One last specialization: _M_do_to_ulong() and the constructor from
// unsigned long are very simple if the bitset consists of a single
// word of type unsigned long.
//
template<>
inline unsigned long
_Base_bitset<1, unsigned long>::_M_do_to_ulong() const { return _M_w; }
template<>
inline _Base_bitset<1, unsigned long>::_Base_bitset(unsigned long __val) {
_M_w = __val;
}
// ------------------------------------------------------------
// Helper class to zero out the unused high-order bits in the highest word.
template <class _WordT, size_t _Extrabits> struct _Sanitize {
static void _M_do_sanitize(_WordT& __val)
{ __val &= ~((~static_cast<_WordT>(0)) << _Extrabits); }
};
template <class _WordT> struct _Sanitize<_WordT, 0> {
static void _M_do_sanitize(_WordT) {}
};
// ------------------------------------------------------------
// Class bitset.
// _Nb may be any nonzero number of type size_t.
// Type _WordT may be any unsigned integral type.
template<size_t _Nb, class _WordT = unsigned long>
class bitset : private _Base_bitset<__BITSET_WORDS(_Nb,_WordT), _WordT>
{
private:
typedef _Base_bitset<__BITSET_WORDS(_Nb,_WordT), _WordT> _Base;
// Import base's protected interface. Necessary because of new template
// name resolution rules.
using _Base::_S_whichword;
using _Base::_S_whichbyte;
using _Base::_S_whichbit;
using _Base::_S_maskbit;
using _Base::_M_getword;
using _Base::_M_hiword;
using _Base::_M_do_and;
using _Base::_M_do_or;
using _Base::_M_do_xor;
using _Base::_M_do_left_shift;
using _Base::_M_do_right_shift;
using _Base::_M_do_flip;
using _Base::_M_do_set;
using _Base::_M_do_reset;
using _Base::_M_is_equal;
using _Base::_M_is_any;
using _Base::_M_do_count;
using _Base::_M_do_to_ulong;
using _Base::_M_do_find_first;
using _Base::_M_do_find_next;
private:
void _M_do_sanitize() {
_Sanitize<_WordT,_Nb%__BITS_PER_WORDT(_WordT) >
::_M_do_sanitize(_M_hiword());
}
public:
// bit reference:
class reference {
friend class bitset;
_WordT *_M_wp;
size_t _M_bpos;
// left undefined
reference();
reference( bitset& __b, size_t __pos ) {
_M_wp = &__b._M_getword(__pos);
_M_bpos = _S_whichbit(__pos);
}
public:
~reference() {}
// for b[i] = __x;
reference& operator=(bool __x) {
if ( __x )
*_M_wp |= _S_maskbit(_M_bpos);
else
*_M_wp &= ~_S_maskbit(_M_bpos);
return *this;
}
// for b[i] = b[__j];
reference& operator=(const reference& __j) {
if ( (*(__j._M_wp) & _S_maskbit(__j._M_bpos)) )
*_M_wp |= _S_maskbit(_M_bpos);
else
*_M_wp &= ~_S_maskbit(_M_bpos);
return *this;
}
// flips the bit
bool operator~() const { return (*(_M_wp) & _S_maskbit(_M_bpos)) == 0; }
// for __x = b[i];
operator bool() const { return (*(_M_wp) & _S_maskbit(_M_bpos)) != 0; }
// for b[i].flip();
reference& flip() {
*_M_wp ^= _S_maskbit(_M_bpos);
return *this;
}
};
// 23.3.5.1 constructors:
bitset() {}
bitset(unsigned long __val) :
_Base_bitset<__BITSET_WORDS(_Nb,_WordT), _WordT>(__val) {}
template<class _CharT, class _Traits, class _Alloc>
explicit bitset(const basic_string<_CharT,_Traits,_Alloc>& __s,
size_t __pos = 0,
size_t __n = basic_string<_CharT,_Traits,_Alloc>::npos)
: _Base()
{
if (__pos > __s.size())
__STL_THROW(out_of_range("bitset"));
_M_copy_from_string(__s, __pos, __n);
}
// 23.3.5.2 bitset operations:
bitset<_Nb,_WordT>& operator&=(const bitset<_Nb,_WordT>& __rhs) {
_M_do_and(__rhs);
return *this;
}
bitset<_Nb,_WordT>& operator|=(const bitset<_Nb,_WordT>& __rhs) {
_M_do_or(__rhs);
return *this;
}
bitset<_Nb,_WordT>& operator^=(const bitset<_Nb,_WordT>& __rhs) {
_M_do_xor(__rhs);
return *this;
}
bitset<_Nb,_WordT>& operator<<=(size_t __pos) {
_M_do_left_shift(__pos);
_M_do_sanitize();
return *this;
}
bitset<_Nb,_WordT>& operator>>=(size_t __pos) {
_M_do_right_shift(__pos);
_M_do_sanitize();
return *this;
}
//
// Extension:
// Versions of single-bit set, reset, flip, test with no range checking.
//
bitset<_Nb,_WordT>& _Unchecked_set(size_t __pos) {
_M_getword(__pos) |= _S_maskbit(__pos);
return *this;
}
bitset<_Nb,_WordT>& _Unchecked_set(size_t __pos, int __val) {
if (__val)
_M_getword(__pos) |= _S_maskbit(__pos);
else
_M_getword(__pos) &= ~_S_maskbit(__pos);
return *this;
}
bitset<_Nb,_WordT>& _Unchecked_reset(size_t __pos) {
_M_getword(__pos) &= ~_S_maskbit(__pos);
return *this;
}
bitset<_Nb,_WordT>& _Unchecked_flip(size_t __pos) {
_M_getword(__pos) ^= _S_maskbit(__pos);
return *this;
}
bool _Unchecked_test(size_t __pos) const {
return (_M_getword(__pos) & _S_maskbit(__pos)) != static_cast<_WordT>(0);
}
// Set, reset, and flip.
bitset<_Nb,_WordT>& set() {
_M_do_set();
_M_do_sanitize();
return *this;
}
bitset<_Nb,_WordT>& set(size_t __pos) {
if (__pos >= _Nb)
__STL_THROW(out_of_range("bitset"));
return _Unchecked_set(__pos);
}
bitset<_Nb,_WordT>& set(size_t __pos, int __val) {
if (__pos >= _Nb)
__STL_THROW(out_of_range("bitset"));
return _Unchecked_set(__pos, __val);
}
bitset<_Nb,_WordT>& reset() {
_M_do_reset();
return *this;
}
bitset<_Nb,_WordT>& reset(size_t __pos) {
if (__pos >= _Nb)
__STL_THROW(out_of_range("bitset"));
return _Unchecked_reset(__pos);
}
bitset<_Nb,_WordT>& flip() {
_M_do_flip();
_M_do_sanitize();
return *this;
}
bitset<_Nb,_WordT>& flip(size_t __pos) {
if (__pos >= _Nb)
__STL_THROW(out_of_range("bitset"));
return _Unchecked_flip(__pos);
}
bitset<_Nb,_WordT> operator~() const {
return bitset<_Nb,_WordT>(*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 _M_do_to_ulong(); }
#if __STL_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;
}
#endif /* __STL_EXPLICIT_FUNCTION_TMPL_ARGS */
// Helper functions for string operations.
template<class _CharT, class _Traits, class _Alloc>
void _M_copy_from_string(const basic_string<_CharT,_Traits,_Alloc>& __s,
size_t,
size_t);
// Helper functions for string operations.
template<class _CharT, class _Traits, class _Alloc>
void _M_copy_to_string(basic_string<_CharT,_Traits,_Alloc>&) const;
size_t count() const { return _M_do_count(); }
size_t size() const { return _Nb; }
bool operator==(const bitset<_Nb,_WordT>& __rhs) const {
return _M_is_equal(__rhs);
}
bool operator!=(const bitset<_Nb,_WordT>& __rhs) const {
return !_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 _M_is_any(); }
bool none() const { return !_M_is_any(); }
bitset<_Nb,_WordT> operator<<(size_t __pos) const
{ return bitset<_Nb,_WordT>(*this) <<= __pos; }
bitset<_Nb,_WordT> operator>>(size_t __pos) const
{ return bitset<_Nb,_WordT>(*this) >>= __pos; }
//
// 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 _M_do_find_first(_Nb); }
// find the index of the next "on" bit after prev
size_t _Find_next( size_t __prev ) const
{ return _M_do_find_next(__prev, _Nb); }
};
//
// Definitions of non-inline member functions.
//
template <size_t _Nb, class _WordT>
template<class _CharT, class _Traits, class _Alloc>
void bitset<_Nb, _WordT>
::_M_copy_from_string(const basic_string<_CharT,_Traits,_Alloc>& __s,
size_t __pos,
size_t __n)
{
reset();
const size_t __nbits = min(_Nb, min(__n, __s.size() - __pos));
for (size_t __i = 0; __i < __nbits; ++__i) {
switch(__s[__pos + __nbits - __i - 1]) {
case '0':
break;
case '1':
set(__i);
break;
default:
__STL_THROW(invalid_argument("bitset"));
}
}
}
template <size_t _Nb, class _WordT>
template <class _CharT, class _Traits, class _Alloc>
void bitset<_Nb, _WordT>
::_M_copy_to_string(basic_string<_CharT, _Traits, _Alloc>& __s) const
{
__s.assign(_Nb, '0');
for (size_t __i = 0; __i < _Nb; ++__i)
if (_Unchecked_test(__i))
__s[_Nb - 1 - __i] = '1';
}
// ------------------------------------------------------------
//
// 23.3.5.3 bitset operations:
//
template <size_t _Nb, class _WordT>
inline bitset<_Nb,_WordT> operator&(const bitset<_Nb,_WordT>& __x,
const bitset<_Nb,_WordT>& __y) {
bitset<_Nb,_WordT> __result(__x);
__result &= __y;
return __result;
}
template <size_t _Nb, class _WordT>
inline bitset<_Nb,_WordT> operator|(const bitset<_Nb,_WordT>& __x,
const bitset<_Nb,_WordT>& __y) {
bitset<_Nb,_WordT> __result(__x);
__result |= __y;
return __result;
}
template <size_t _Nb, class _WordT>
inline bitset<_Nb,_WordT> operator^(const bitset<_Nb,_WordT>& __x,
const bitset<_Nb,_WordT>& __y) {
bitset<_Nb,_WordT> __result(__x);
__result ^= __y;
return __result;
}
// NOTE: these must be rewritten once we have templatized iostreams.
template <size_t _Nb, class _WordT>
istream&
operator>>(istream& __is, bitset<_Nb,_WordT>& __x) {
string __tmp;
__tmp.reserve(_Nb);
// In new templatized iostreams, use istream::sentry
if (__is.flags() & ios::skipws) {
char __c;
do
__is.get(__c);
while (__is && isspace(__c));
if (__is)
__is.putback(__c);
}
for (size_t __i = 0; __i < _Nb; ++__i) {
char __c;
__is.get(__c);
if (!__is)
break;
else if (__c != '0' && __c != '1') {
__is.putback(__c);
break;
}
else
__tmp.push_back(__c);
}
if (__tmp.empty())
__is.clear(__is.rdstate() | ios::failbit);
else
__x._M_copy_from_string(__tmp, static_cast<size_t>(0), _Nb);
return __is;
}
template <size_t _Nb, class _WordT>
ostream& operator<<(ostream& __os, const bitset<_Nb,_WordT>& __x) {
string __tmp;
__x._M_copy_to_string(__tmp);
return __os << __tmp;
}
// ------------------------------------------------------------
// Lookup tables for find and count operations.
template<bool __dummy>
unsigned char _Bit_count<__dummy>::_S_bit_count[] = {
0, /* 0 */ 1, /* 1 */ 1, /* 2 */ 2, /* 3 */ 1, /* 4 */
2, /* 5 */ 2, /* 6 */ 3, /* 7 */ 1, /* 8 */ 2, /* 9 */
2, /* 10 */ 3, /* 11 */ 2, /* 12 */ 3, /* 13 */ 3, /* 14 */
4, /* 15 */ 1, /* 16 */ 2, /* 17 */ 2, /* 18 */ 3, /* 19 */
2, /* 20 */ 3, /* 21 */ 3, /* 22 */ 4, /* 23 */ 2, /* 24 */
3, /* 25 */ 3, /* 26 */ 4, /* 27 */ 3, /* 28 */ 4, /* 29 */
4, /* 30 */ 5, /* 31 */ 1, /* 32 */ 2, /* 33 */ 2, /* 34 */
3, /* 35 */ 2, /* 36 */ 3, /* 37 */ 3, /* 38 */ 4, /* 39 */
2, /* 40 */ 3, /* 41 */ 3, /* 42 */ 4, /* 43 */ 3, /* 44 */
4, /* 45 */ 4, /* 46 */ 5, /* 47 */ 2, /* 48 */ 3, /* 49 */
3, /* 50 */ 4, /* 51 */ 3, /* 52 */ 4, /* 53 */ 4, /* 54 */
5, /* 55 */ 3, /* 56 */ 4, /* 57 */ 4, /* 58 */ 5, /* 59 */
4, /* 60 */ 5, /* 61 */ 5, /* 62 */ 6, /* 63 */ 1, /* 64 */
2, /* 65 */ 2, /* 66 */ 3, /* 67 */ 2, /* 68 */ 3, /* 69 */
3, /* 70 */ 4, /* 71 */ 2, /* 72 */ 3, /* 73 */ 3, /* 74 */
4, /* 75 */ 3, /* 76 */ 4, /* 77 */ 4, /* 78 */ 5, /* 79 */
2, /* 80 */ 3, /* 81 */ 3, /* 82 */ 4, /* 83 */ 3, /* 84 */
4, /* 85 */ 4, /* 86 */ 5, /* 87 */ 3, /* 88 */ 4, /* 89 */
4, /* 90 */ 5, /* 91 */ 4, /* 92 */ 5, /* 93 */ 5, /* 94 */
6, /* 95 */ 2, /* 96 */ 3, /* 97 */ 3, /* 98 */ 4, /* 99 */
3, /* 100 */ 4, /* 101 */ 4, /* 102 */ 5, /* 103 */ 3, /* 104 */
4, /* 105 */ 4, /* 106 */ 5, /* 107 */ 4, /* 108 */ 5, /* 109 */
5, /* 110 */ 6, /* 111 */ 3, /* 112 */ 4, /* 113 */ 4, /* 114 */
5, /* 115 */ 4, /* 116 */ 5, /* 117 */ 5, /* 118 */ 6, /* 119 */
4, /* 120 */ 5, /* 121 */ 5, /* 122 */ 6, /* 123 */ 5, /* 124 */
6, /* 125 */ 6, /* 126 */ 7, /* 127 */ 1, /* 128 */ 2, /* 129 */
2, /* 130 */ 3, /* 131 */ 2, /* 132 */ 3, /* 133 */ 3, /* 134 */
4, /* 135 */ 2, /* 136 */ 3, /* 137 */ 3, /* 138 */ 4, /* 139 */
3, /* 140 */ 4, /* 141 */ 4, /* 142 */ 5, /* 143 */ 2, /* 144 */
3, /* 145 */ 3, /* 146 */ 4, /* 147 */ 3, /* 148 */ 4, /* 149 */
4, /* 150 */ 5, /* 151 */ 3, /* 152 */ 4, /* 153 */ 4, /* 154 */
5, /* 155 */ 4, /* 156 */ 5, /* 157 */ 5, /* 158 */ 6, /* 159 */
2, /* 160 */ 3, /* 161 */ 3, /* 162 */ 4, /* 163 */ 3, /* 164 */
4, /* 165 */ 4, /* 166 */ 5, /* 167 */ 3, /* 168 */ 4, /* 169 */
4, /* 170 */ 5, /* 171 */ 4, /* 172 */ 5, /* 173 */ 5, /* 174 */
6, /* 175 */ 3, /* 176 */ 4, /* 177 */ 4, /* 178 */ 5, /* 179 */
4, /* 180 */ 5, /* 181 */ 5, /* 182 */ 6, /* 183 */ 4, /* 184 */
5, /* 185 */ 5, /* 186 */ 6, /* 187 */ 5, /* 188 */ 6, /* 189 */
6, /* 190 */ 7, /* 191 */ 2, /* 192 */ 3, /* 193 */ 3, /* 194 */
4, /* 195 */ 3, /* 196 */ 4, /* 197 */ 4, /* 198 */ 5, /* 199 */
3, /* 200 */ 4, /* 201 */ 4, /* 202 */ 5, /* 203 */ 4, /* 204 */
5, /* 205 */ 5, /* 206 */ 6, /* 207 */ 3, /* 208 */ 4, /* 209 */
4, /* 210 */ 5, /* 211 */ 4, /* 212 */ 5, /* 213 */ 5, /* 214 */
6, /* 215 */ 4, /* 216 */ 5, /* 217 */ 5, /* 218 */ 6, /* 219 */
5, /* 220 */ 6, /* 221 */ 6, /* 222 */ 7, /* 223 */ 3, /* 224 */
4, /* 225 */ 4, /* 226 */ 5, /* 227 */ 4, /* 228 */ 5, /* 229 */
5, /* 230 */ 6, /* 231 */ 4, /* 232 */ 5, /* 233 */ 5, /* 234 */
6, /* 235 */ 5, /* 236 */ 6, /* 237 */ 6, /* 238 */ 7, /* 239 */
4, /* 240 */ 5, /* 241 */ 5, /* 242 */ 6, /* 243 */ 5, /* 244 */
6, /* 245 */ 6, /* 246 */ 7, /* 247 */ 5, /* 248 */ 6, /* 249 */
6, /* 250 */ 7, /* 251 */ 6, /* 252 */ 7, /* 253 */ 7, /* 254 */
8 /* 255 */
}; // end _Bit_count
template<bool __dummy>
unsigned char _First_one<__dummy>::_S_first_one[] = {
0, /* 0 */ 0, /* 1 */ 1, /* 2 */ 0, /* 3 */ 2, /* 4 */
0, /* 5 */ 1, /* 6 */ 0, /* 7 */ 3, /* 8 */ 0, /* 9 */
1, /* 10 */ 0, /* 11 */ 2, /* 12 */ 0, /* 13 */ 1, /* 14 */
0, /* 15 */ 4, /* 16 */ 0, /* 17 */ 1, /* 18 */ 0, /* 19 */
2, /* 20 */ 0, /* 21 */ 1, /* 22 */ 0, /* 23 */ 3, /* 24 */
0, /* 25 */ 1, /* 26 */ 0, /* 27 */ 2, /* 28 */ 0, /* 29 */
1, /* 30 */ 0, /* 31 */ 5, /* 32 */ 0, /* 33 */ 1, /* 34 */
0, /* 35 */ 2, /* 36 */ 0, /* 37 */ 1, /* 38 */ 0, /* 39 */
3, /* 40 */ 0, /* 41 */ 1, /* 42 */ 0, /* 43 */ 2, /* 44 */
0, /* 45 */ 1, /* 46 */ 0, /* 47 */ 4, /* 48 */ 0, /* 49 */
1, /* 50 */ 0, /* 51 */ 2, /* 52 */ 0, /* 53 */ 1, /* 54 */
0, /* 55 */ 3, /* 56 */ 0, /* 57 */ 1, /* 58 */ 0, /* 59 */
2, /* 60 */ 0, /* 61 */ 1, /* 62 */ 0, /* 63 */ 6, /* 64 */
0, /* 65 */ 1, /* 66 */ 0, /* 67 */ 2, /* 68 */ 0, /* 69 */
1, /* 70 */ 0, /* 71 */ 3, /* 72 */ 0, /* 73 */ 1, /* 74 */
0, /* 75 */ 2, /* 76 */ 0, /* 77 */ 1, /* 78 */ 0, /* 79 */
4, /* 80 */ 0, /* 81 */ 1, /* 82 */ 0, /* 83 */ 2, /* 84 */
0, /* 85 */ 1, /* 86 */ 0, /* 87 */ 3, /* 88 */ 0, /* 89 */
1, /* 90 */ 0, /* 91 */ 2, /* 92 */ 0, /* 93 */ 1, /* 94 */
0, /* 95 */ 5, /* 96 */ 0, /* 97 */ 1, /* 98 */ 0, /* 99 */
2, /* 100 */ 0, /* 101 */ 1, /* 102 */ 0, /* 103 */ 3, /* 104 */
0, /* 105 */ 1, /* 106 */ 0, /* 107 */ 2, /* 108 */ 0, /* 109 */
1, /* 110 */ 0, /* 111 */ 4, /* 112 */ 0, /* 113 */ 1, /* 114 */
0, /* 115 */ 2, /* 116 */ 0, /* 117 */ 1, /* 118 */ 0, /* 119 */
3, /* 120 */ 0, /* 121 */ 1, /* 122 */ 0, /* 123 */ 2, /* 124 */
0, /* 125 */ 1, /* 126 */ 0, /* 127 */ 7, /* 128 */ 0, /* 129 */
1, /* 130 */ 0, /* 131 */ 2, /* 132 */ 0, /* 133 */ 1, /* 134 */
0, /* 135 */ 3, /* 136 */ 0, /* 137 */ 1, /* 138 */ 0, /* 139 */
2, /* 140 */ 0, /* 141 */ 1, /* 142 */ 0, /* 143 */ 4, /* 144 */
0, /* 145 */ 1, /* 146 */ 0, /* 147 */ 2, /* 148 */ 0, /* 149 */
1, /* 150 */ 0, /* 151 */ 3, /* 152 */ 0, /* 153 */ 1, /* 154 */
0, /* 155 */ 2, /* 156 */ 0, /* 157 */ 1, /* 158 */ 0, /* 159 */
5, /* 160 */ 0, /* 161 */ 1, /* 162 */ 0, /* 163 */ 2, /* 164 */
0, /* 165 */ 1, /* 166 */ 0, /* 167 */ 3, /* 168 */ 0, /* 169 */
1, /* 170 */ 0, /* 171 */ 2, /* 172 */ 0, /* 173 */ 1, /* 174 */
0, /* 175 */ 4, /* 176 */ 0, /* 177 */ 1, /* 178 */ 0, /* 179 */
2, /* 180 */ 0, /* 181 */ 1, /* 182 */ 0, /* 183 */ 3, /* 184 */
0, /* 185 */ 1, /* 186 */ 0, /* 187 */ 2, /* 188 */ 0, /* 189 */
1, /* 190 */ 0, /* 191 */ 6, /* 192 */ 0, /* 193 */ 1, /* 194 */
0, /* 195 */ 2, /* 196 */ 0, /* 197 */ 1, /* 198 */ 0, /* 199 */
3, /* 200 */ 0, /* 201 */ 1, /* 202 */ 0, /* 203 */ 2, /* 204 */
0, /* 205 */ 1, /* 206 */ 0, /* 207 */ 4, /* 208 */ 0, /* 209 */
1, /* 210 */ 0, /* 211 */ 2, /* 212 */ 0, /* 213 */ 1, /* 214 */
0, /* 215 */ 3, /* 216 */ 0, /* 217 */ 1, /* 218 */ 0, /* 219 */
2, /* 220 */ 0, /* 221 */ 1, /* 222 */ 0, /* 223 */ 5, /* 224 */
0, /* 225 */ 1, /* 226 */ 0, /* 227 */ 2, /* 228 */ 0, /* 229 */
1, /* 230 */ 0, /* 231 */ 3, /* 232 */ 0, /* 233 */ 1, /* 234 */
0, /* 235 */ 2, /* 236 */ 0, /* 237 */ 1, /* 238 */ 0, /* 239 */
4, /* 240 */ 0, /* 241 */ 1, /* 242 */ 0, /* 243 */ 2, /* 244 */
0, /* 245 */ 1, /* 246 */ 0, /* 247 */ 3, /* 248 */ 0, /* 249 */
1, /* 250 */ 0, /* 251 */ 2, /* 252 */ 0, /* 253 */ 1, /* 254 */
0, /* 255 */
}; // end _First_one
#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma reset woff 1209
#endif
__STL_END_NAMESPACE
#undef __BITS_PER_WORDT
#undef __BITSET_WORDS
#endif /* __SGI_STL_BITSET */
// Local Variables:
// mode:C++
// End:
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