/home/ntakagi/work/STLport-5.1.5/stlport/stl/_bitset.c Go to the documentation of this file. /* * 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_C #define _STLP_BITSET_C #ifndef _STLP_BITSET_H # include <stl/_bitset.h> #endif #define __BITS_PER_WORD (CHAR_BIT * sizeof(unsigned long)) _STLP_BEGIN_NAMESPACE _STLP_MOVE_TO_PRIV_NAMESPACE // // Definitions of non-inline functions from _Base_bitset. // template<size_t _Nw> void _Base_bitset<_Nw>::_M_do_left_shift(size_t __shift) { if (__shift != 0) { const size_t __wshift = __shift / __BITS_PER_WORD; const size_t __offset = __shift % __BITS_PER_WORD; if (__offset == 0) for (size_t __n = _Nw - 1; __n >= __wshift; --__n) _M_w[__n] = _M_w[__n - __wshift]; else { const size_t __sub_offset = __BITS_PER_WORD - __offset; for (size_t __n = _Nw - 1; __n > __wshift; --__n) _M_w[__n] = (_M_w[__n - __wshift] << __offset) | (_M_w[__n - __wshift - 1] >> __sub_offset); _M_w[__wshift] = _M_w[0] << __offset; } fill(_M_w + 0, _M_w + __wshift, __STATIC_CAST(_WordT,0)); } } template<size_t _Nw> void _Base_bitset<_Nw>::_M_do_right_shift(size_t __shift) { if (__shift != 0) { const size_t __wshift = __shift / __BITS_PER_WORD; const size_t __offset = __shift % __BITS_PER_WORD; const size_t __limit = _Nw - __wshift - 1; if (__offset == 0) for (size_t __n = 0; __n <= __limit; ++__n) _M_w[__n] = _M_w[__n + __wshift]; else { const size_t __sub_offset = __BITS_PER_WORD - __offset; for (size_t __n = 0; __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; } fill(_M_w + __limit + 1, _M_w + _Nw, __STATIC_CAST(_WordT,0)); } } template<size_t _Nw> unsigned long _Base_bitset<_Nw>::_M_do_to_ulong() const { for (size_t __i = 1; __i < _Nw; ++__i) if (_M_w[__i]) __stl_throw_overflow_error("bitset"); return _M_w[0]; } // End _M_do_to_ulong template<size_t _Nw> size_t _Base_bitset<_Nw>::_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_WORD + __j*CHAR_BIT + _Bs_G::_S_first_one(__this_byte); __thisword >>= CHAR_BIT; } } } // not found, so return an indication of failure. return __not_found; } template<size_t _Nw> size_t _Base_bitset<_Nw>::_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_WORD ) 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_WORD + __j*CHAR_BIT + _Bs_G::_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_WORD + __j*CHAR_BIT + _Bs_G::_S_first_one(__this_byte); __thisword >>= CHAR_BIT; } } } // not found, so return an indication of failure. return __not_found; } // end _M_do_find_next _STLP_MOVE_TO_STD_NAMESPACE #if !defined (_STLP_NON_TYPE_TMPL_PARAM_BUG) # if !defined (_STLP_USE_NO_IOSTREAMS) _STLP_END_NAMESPACE #ifndef _STLP_STRING_IO_H # include <stl/_string_io.h> //includes _istream.h and _ostream.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) { basic_string<_CharT, _Traits> __tmp; __tmp.reserve(_Nb); // Skip whitespace typename basic_istream<_CharT, _Traits>::sentry __sentry(__is); if (__sentry) { basic_streambuf<_CharT, _Traits>* __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 <class _CharT, class _Traits, size_t _Nb> basic_ostream<_CharT, _Traits>& _STLP_CALL operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Nb>& __x) { basic_string<_CharT, _Traits> __tmp; __x._M_copy_to_string(__tmp); return __os << __tmp; } # endif /* !_STLP_USE_NO_IOSTREAMS */ #endif /* _STLP_NON_TYPE_TMPL_PARAM_BUG */ _STLP_END_NAMESPACE #undef __BITS_PER_WORD #undef bitset #endif /* _STLP_BITSET_C */

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