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std_bitset.h: Replace CHAR_BIT with __CHAR_BIT__, use numeric_limits for bits-per-word values.
2003-02-03 Falk Hueffner <falk.hueffner@student.uni-tuebingen.de>
Phil Edwards <pme@gcc.gnu.org>
* include/std/std_bitset.h: Replace CHAR_BIT with __CHAR_BIT__, use
numeric_limits for bits-per-word values.
(_Base_bitset::_M_do_count, _Base_bitset<1>::_M_do_count):
Use __builtin_popcountl instead.
(_Base_bitset::_M_do_find_first, _Base_bitset::_M_do_find_next,
_Base_bitset<1>::_M_do_find_first, _Base_bitset<1>::_M_do_find_next):
Use __builtin_ctzl instead.
(_S_bit_count, _S_first_one): Remove.
* config/linker-map.gnu (GLIBCPP_3.4): Remove std::_S_bit_count.
* src/Makefile.am (sources): Remove bitset.cc.
* src/bitset.cc: Delete file.
* src/Makefile.in: Regenerate.
Co-Authored-By: Phil Edwards <pme@gcc.gnu.org>
From-SVN: r62335
This commit is contained in:
Falk Hueffner
Phil Edwards
parent
2d7b3505f7
commit
348b0c3105
@ -1,3 +1,19 @@
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2003-02-03 Falk Hueffner <falk.hueffner@student.uni-tuebingen.de>
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Phil Edwards <pme@gcc.gnu.org>
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* include/std/std_bitset.h: Replace CHAR_BIT with __CHAR_BIT__, use
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numeric_limits for bits-per-word values.
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(_Base_bitset::_M_do_count, _Base_bitset<1>::_M_do_count):
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Use __builtin_popcountl instead.
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(_Base_bitset::_M_do_find_first, _Base_bitset::_M_do_find_next,
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_Base_bitset<1>::_M_do_find_first, _Base_bitset<1>::_M_do_find_next):
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Use __builtin_ctzl instead.
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(_S_bit_count, _S_first_one): Remove.
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* config/linker-map.gnu (GLIBCPP_3.4): Remove std::_S_bit_count.
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* src/Makefile.am (sources): Remove bitset.cc.
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* src/bitset.cc: Delete file.
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* src/Makefile.in: Regenerate.
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2003-02-03 Phil Edwards <pme@gcc.gnu.org>
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PR libstdc++/9527, PR libstdc++/8713
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@ -62,8 +62,7 @@ GLIBCPP_3.4 {
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std::__basic_file*;
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std::__num_base*;
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std::__timepunct*;
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std::__numeric_limits_base*;
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std::_S_bit_count
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std::__numeric_limits_base*
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};
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# Names not in an 'extern' block are mangled names.
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@ -1,6 +1,6 @@
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// <bitset> -*- C++ -*-
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// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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@ -52,6 +52,7 @@
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#include <cstddef> // for size_t
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#include <cstring> // for memset
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#include <limits> // for numeric_limits
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#include <string>
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#include <bits/functexcept.h> // for invalid_argument, out_of_range,
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// overflow_error
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@ -59,15 +60,12 @@
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#include <istream> // for istream (operator>>)
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#define _GLIBCPP_BITSET_BITS_PER_WORD (CHAR_BIT*sizeof(unsigned long))
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#define _GLIBCPP_BITSET_BITS_PER_WORD numeric_limits<unsigned long>::digits
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#define _GLIBCPP_BITSET_WORDS(__n) \
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((__n) < 1 ? 0 : ((__n) + _GLIBCPP_BITSET_BITS_PER_WORD - 1)/_GLIBCPP_BITSET_BITS_PER_WORD)
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namespace std
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{
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extern unsigned char _S_bit_count[256];
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extern unsigned char _S_first_one[256];
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/**
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* @if maint
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* Base class, general case. It is a class inveriant that _Nw will be
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@ -97,7 +95,7 @@ namespace std
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static size_t
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_S_whichbyte(size_t __pos )
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / CHAR_BIT; }
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
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static size_t
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_S_whichbit(size_t __pos )
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@ -191,14 +189,8 @@ namespace std
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_M_do_count() const
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{
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size_t __result = 0;
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const unsigned char* __byte_ptr = (const unsigned char*)_M_w;
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const unsigned char* __end_ptr = (const unsigned char*)(_M_w + _Nw);
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while ( __byte_ptr < __end_ptr )
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{
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__result += _S_bit_count[*__byte_ptr];
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__byte_ptr++;
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}
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for (size_t __i = 0; __i < _Nw; __i++)
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__result += __builtin_popcountl(_M_w[__i]);
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return __result;
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}
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@ -280,23 +272,12 @@ namespace std
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size_t
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_Base_bitset<_Nw>::_M_do_find_first(size_t __not_found) const
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{
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for (size_t __i = 0; __i < _Nw; __i++ )
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for (size_t __i = 0; __i < _Nw; __i++)
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{
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_WordT __thisword = _M_w[__i];
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if ( __thisword != static_cast<_WordT>(0) )
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{
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// find byte within word
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for (size_t __j = 0; __j < sizeof(_WordT); __j++ )
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{
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unsigned char __this_byte
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= static_cast<unsigned char>(__thisword & (~(unsigned char)0));
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if (__this_byte)
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return __i*_GLIBCPP_BITSET_BITS_PER_WORD + __j*CHAR_BIT +
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_S_first_one[__this_byte];
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__thisword >>= CHAR_BIT;
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}
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}
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if (__thisword != static_cast<_WordT>(0))
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return __i * _GLIBCPP_BITSET_BITS_PER_WORD
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+ __builtin_ctzl(__thisword);
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}
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// not found, so return an indication of failure.
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return __not_found;
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@ -318,44 +299,20 @@ namespace std
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_WordT __thisword = _M_w[__i];
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// mask off bits below bound
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__thisword &= (~static_cast<_WordT>(0)) << _S_whichbit(__prev);
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__thisword >>= __prev + 1;
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if ( __thisword != static_cast<_WordT>(0) )
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{
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// find byte within word
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// get first byte into place
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__thisword >>= _S_whichbyte(__prev) * CHAR_BIT;
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for (size_t __j = _S_whichbyte(__prev); __j < sizeof(_WordT); __j++)
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{
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unsigned char __this_byte
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= static_cast<unsigned char>(__thisword & (~(unsigned char)0));
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if ( __this_byte )
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return __i*_GLIBCPP_BITSET_BITS_PER_WORD + __j*CHAR_BIT +
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_S_first_one[__this_byte];
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__thisword >>= CHAR_BIT;
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}
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}
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if (__thisword != static_cast<_WordT>(0))
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return __i * _GLIBCPP_BITSET_BITS_PER_WORD
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+ __builtin_ctzl(__thisword);
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// check subsequent words
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__i++;
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for ( ; __i < _Nw; __i++ )
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{
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__thisword = _M_w[__i];
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if ( __thisword != static_cast<_WordT>(0) )
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{
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// find byte within word
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for (size_t __j = 0; __j < sizeof(_WordT); __j++ )
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{
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unsigned char __this_byte
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= static_cast<unsigned char>(__thisword & (~(unsigned char)0));
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if ( __this_byte )
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return __i*_GLIBCPP_BITSET_BITS_PER_WORD + __j*CHAR_BIT +
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_S_first_one[__this_byte];
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__thisword >>= CHAR_BIT;
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}
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}
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if (__thisword != static_cast<_WordT>(0))
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return __i * _GLIBCPP_BITSET_BITS_PER_WORD
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+ __builtin_ctzl(__thisword);
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}
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// not found, so return an indication of failure.
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return __not_found;
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@ -384,7 +341,7 @@ namespace std
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static size_t
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_S_whichbyte(size_t __pos )
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / CHAR_BIT; }
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
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static size_t
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_S_whichbit(size_t __pos )
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@ -438,29 +395,34 @@ namespace std
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_M_is_any() const { return _M_w != 0; }
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size_t
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_M_do_count() const
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{
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size_t __result = 0;
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const unsigned char* __byte_ptr = (const unsigned char*)&_M_w;
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const unsigned char* __end_ptr
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= ((const unsigned char*)&_M_w)+sizeof(_M_w);
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while ( __byte_ptr < __end_ptr )
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{
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__result += _S_bit_count[*__byte_ptr];
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__byte_ptr++;
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}
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return __result;
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}
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_M_do_count() const { return __builtin_popcountl(_M_w); }
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unsigned long
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_M_do_to_ulong() const { return _M_w; }
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size_t
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_M_do_find_first(size_t __not_found) const;
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_M_do_find_first(size_t __not_found) const
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{
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if (_M_w != 0)
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return __builtin_ctzl(_M_w);
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else
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return __not_found;
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}
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// find the next "on" bit that follows "prev"
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size_t
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_M_do_find_next(size_t __prev, size_t __not_found) const;
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_M_do_find_next(size_t __prev, size_t __not_found) const
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{
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++__prev;
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if (__prev >= _GLIBCPP_BITSET_BITS_PER_WORD)
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return __not_found;
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_WordT __x = _M_w >> __prev;
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if (__x != 0)
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return __builtin_ctzl(__x) + __prev;
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else
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return __not_found;
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}
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};
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@ -485,7 +447,7 @@ namespace std
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static size_t
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_S_whichbyte(size_t __pos )
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / CHAR_BIT; }
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{ return (__pos % _GLIBCPP_BITSET_BITS_PER_WORD) / __CHAR_BIT__; }
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static size_t
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_S_whichbit(size_t __pos )
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@ -1248,5 +1210,6 @@ namespace std
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} // namespace std
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#undef _GLIBCPP_BITSET_WORDS
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#undef _GLIBCPP_BITSET_BITS_PER_WORD
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#endif /* _GLIBCPP_BITSET_H */
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@ -117,7 +117,6 @@ basic_file.cc: ${glibcpp_srcdir}/@BASIC_FILE_CC@
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# Sources present in the src directory.
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sources = \
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bitset.cc \
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codecvt.cc \
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complex_io.cc \
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concept-inst.cc \
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@ -1,4 +1,4 @@
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# Makefile.in generated automatically by automake 1.4-p5 from Makefile.am
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# Makefile.in generated automatically by automake 1.4-p6 from Makefile.am
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# Copyright (C) 1994, 1995-8, 1999, 2001 Free Software Foundation, Inc.
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# This Makefile.in is free software; the Free Software Foundation
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@ -146,7 +146,7 @@ glibcpp_builddir = @glibcpp_builddir@
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toolexecdir = @glibcpp_toolexecdir@
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toolexeclibdir = @glibcpp_toolexeclibdir@
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toolexeclib_LTLIBRARIES = libstdc++.la
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@GLIBCPP_BUILD_VERSIONED_SHLIB_TRUE@version_arg = @GLIBCPP_BUILD_VERSIONED_SHLIB_TRUE@-Wl,--version-script=libstdc++-symbol.ver
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@GLIBCPP_BUILD_VERSIONED_SHLIB_TRUE@version_arg = -Wl,--version-script=libstdc++-symbol.ver
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@GLIBCPP_BUILD_VERSIONED_SHLIB_FALSE@version_arg =
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# Compile flags that should be constant throughout the build, both for
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@ -155,13 +155,11 @@ OPTIMIZE_CXXFLAGS = @OPTIMIZE_CXXFLAGS@
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# These bits are all figured out from configure. Look in acinclude.m4
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# or configure.in to see how they are set. See GLIBCPP_EXPORT_FLAGS
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CONFIG_CXXFLAGS = \
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@SECTION_FLAGS@ @EXTRA_CXX_FLAGS@
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CONFIG_CXXFLAGS = @SECTION_FLAGS@ @EXTRA_CXX_FLAGS@
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# Warning flags to use.
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WARN_CXXFLAGS = \
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@WARN_FLAGS@ $(WERROR) -fdiagnostics-show-location=once
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WARN_CXXFLAGS = @WARN_FLAGS@ $(WERROR) -fdiagnostics-show-location=once
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# Use common includes from acinclude.m4/GLIBCPP_EXPORT_INCLUDES
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@ -171,79 +169,33 @@ LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
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LIBIO_INCLUDES = @LIBIO_INCLUDES@
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TOPLEVEL_INCLUDES = @TOPLEVEL_INCLUDES@
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INCLUDES = \
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-nostdinc++ \
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$(GLIBCPP_INCLUDES) \
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$(LIBSUPCXX_INCLUDES) $(LIBIO_INCLUDES) $(LIBMATH_INCLUDES) \
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$(TOPLEVEL_INCLUDES)
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INCLUDES = -nostdinc++ $(GLIBCPP_INCLUDES) $(LIBSUPCXX_INCLUDES) $(LIBIO_INCLUDES) $(LIBMATH_INCLUDES) $(TOPLEVEL_INCLUDES)
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# Source files linked in via configuration/make substitution for a
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# particular target.
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target_sources = \
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codecvt_members.cc \
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collate_members.cc \
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ctype_members.cc \
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messages_members.cc \
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monetary_members.cc \
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numeric_members.cc \
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time_members.cc
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target_sources = codecvt_members.cc collate_members.cc ctype_members.cc messages_members.cc monetary_members.cc numeric_members.cc time_members.cc
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# Source files linked in via configuration/make substitution for a
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# particular target, but with ad hoc naming rules.
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target_sources_extra = \
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basic_file.cc \
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c++locale.cc
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target_sources_extra = basic_file.cc c++locale.cc
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# Sources present in the src directory.
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sources = \
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bitset.cc \
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codecvt.cc \
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complex_io.cc \
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concept-inst.cc \
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ctype.cc \
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ext-inst.cc \
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fstream.cc \
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fstream-inst.cc \
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functexcept.cc \
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globals.cc \
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io-inst.cc \
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ios.cc \
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istream-inst.cc \
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limits.cc \
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locale.cc \
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locale-inst.cc \
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localename.cc \
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misc-inst.cc \
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ostream-inst.cc \
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sstream-inst.cc \
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stdexcept.cc \
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stl-inst.cc \
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streambuf-inst.cc \
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string-inst.cc \
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strstream.cc \
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valarray-inst.cc \
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wstring-inst.cc \
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${target_sources} \
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${target_sources_extra}
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sources = codecvt.cc complex_io.cc concept-inst.cc ctype.cc ext-inst.cc fstream.cc fstream-inst.cc functexcept.cc globals.cc io-inst.cc ios.cc istream-inst.cc limits.cc locale.cc locale-inst.cc localename.cc misc-inst.cc ostream-inst.cc sstream-inst.cc stdexcept.cc stl-inst.cc streambuf-inst.cc string-inst.cc strstream.cc valarray-inst.cc wstring-inst.cc ${target_sources} ${target_sources_extra}
|
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|
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|
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VPATH = $(top_srcdir)/src:$(top_srcdir)
|
||||
|
||||
libstdc___la_SOURCES = $(sources)
|
||||
|
||||
libstdc___la_LIBADD = \
|
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$(top_builddir)/libmath/libmath.la @libio_la@ \
|
||||
$(top_builddir)/libsupc++/libsupc++convenience.la
|
||||
libstdc___la_LIBADD = $(top_builddir)/libmath/libmath.la @libio_la@ $(top_builddir)/libsupc++/libsupc++convenience.la
|
||||
|
||||
|
||||
libstdc___la_DEPENDENCIES = libstdc++-symbol.ver $(libstdc___la_LIBADD)
|
||||
|
||||
libstdc___la_LDFLAGS = \
|
||||
-version-info @libtool_VERSION@ ${version_arg} \
|
||||
-lm @LIBUNWIND_FLAG@
|
||||
libstdc___la_LDFLAGS = -version-info @libtool_VERSION@ ${version_arg} -lm @LIBUNWIND_FLAG@
|
||||
|
||||
|
||||
# Use special rules for the deprecated source files so that they find
|
||||
@ -255,12 +207,7 @@ GLIBCPP_INCLUDE_DIR = @glibcpp_builddir@/include
|
||||
# set this option because CONFIG_CXXFLAGS has to be after
|
||||
# OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
|
||||
# as the occasion call for it.
|
||||
AM_CXXFLAGS = \
|
||||
-fno-implicit-templates \
|
||||
$(LIBSUPCXX_CXXFLAGS) \
|
||||
$(WARN_CXXFLAGS) \
|
||||
$(OPTIMIZE_CXXFLAGS) \
|
||||
$(CONFIG_CXXFLAGS)
|
||||
AM_CXXFLAGS = -fno-implicit-templates $(LIBSUPCXX_CXXFLAGS) $(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS)
|
||||
|
||||
|
||||
# libstdc++ libtool notes
|
||||
@ -281,8 +228,7 @@ AM_CXXFLAGS = \
|
||||
# correct solution is to add `--tag CXX' to LTCXXCOMPILE and maybe
|
||||
# CXXLINK, just after $(LIBTOOL), so that libtool doesn't have to
|
||||
# attempt to infer which configuration to use
|
||||
LTCXXCOMPILE = $(LIBTOOL) --tag CXX --mode=compile $(CXX) $(INCLUDES) \
|
||||
$(AM_CPPFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(AM_CXXFLAGS)
|
||||
LTCXXCOMPILE = $(LIBTOOL) --tag CXX --mode=compile $(CXX) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(AM_CXXFLAGS)
|
||||
|
||||
|
||||
# 3) We'd have a problem when building the shared libstdc++ object if
|
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@ -291,8 +237,7 @@ LTCXXCOMPILE = $(LIBTOOL) --tag CXX --mode=compile $(CXX) $(INCLUDES) \
|
||||
# course is problematic at this point. So, we get the top-level
|
||||
# directory to configure libstdc++-v3 to use gcc as the C++
|
||||
# compilation driver.
|
||||
CXXLINK = $(LIBTOOL) --tag CXX --mode=link $(CXX) \
|
||||
@OPT_LDFLAGS@ @SECTION_LDFLAGS@ $(AM_CXXFLAGS) $(LDFLAGS) -o $@
|
||||
CXXLINK = $(LIBTOOL) --tag CXX --mode=link $(CXX) @OPT_LDFLAGS@ @SECTION_LDFLAGS@ $(AM_CXXFLAGS) $(LDFLAGS) -o $@
|
||||
|
||||
|
||||
debugdir = debug
|
||||
@ -305,10 +250,10 @@ DEFS = @DEFS@ -I. -I$(srcdir) -I..
|
||||
CPPFLAGS = @CPPFLAGS@
|
||||
LDFLAGS = @LDFLAGS@
|
||||
LIBS = @LIBS@
|
||||
libstdc___la_OBJECTS = bitset.lo codecvt.lo complex_io.lo \
|
||||
concept-inst.lo ctype.lo ext-inst.lo fstream.lo fstream-inst.lo \
|
||||
functexcept.lo globals.lo io-inst.lo ios.lo istream-inst.lo limits.lo \
|
||||
locale.lo locale-inst.lo localename.lo misc-inst.lo ostream-inst.lo \
|
||||
libstdc___la_OBJECTS = codecvt.lo complex_io.lo concept-inst.lo \
|
||||
ctype.lo ext-inst.lo fstream.lo fstream-inst.lo functexcept.lo \
|
||||
globals.lo io-inst.lo ios.lo istream-inst.lo limits.lo locale.lo \
|
||||
locale-inst.lo localename.lo misc-inst.lo ostream-inst.lo \
|
||||
sstream-inst.lo stdexcept.lo stl-inst.lo streambuf-inst.lo \
|
||||
string-inst.lo strstream.lo valarray-inst.lo wstring-inst.lo \
|
||||
codecvt_members.lo collate_members.lo ctype_members.lo \
|
||||
@ -322,7 +267,7 @@ DIST_COMMON = Makefile.am Makefile.in
|
||||
|
||||
DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
|
||||
|
||||
TAR = gtar
|
||||
TAR = tar
|
||||
GZIP_ENV = --best
|
||||
SOURCES = $(libstdc___la_SOURCES)
|
||||
OBJECTS = $(libstdc___la_OBJECTS)
|
||||
@ -434,7 +379,7 @@ TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) $(LISP)
|
||||
awk ' { files[$$0] = 1; } \
|
||||
END { for (i in files) print i; }'`; \
|
||||
test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
|
||||
|| (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags $$unique $(LISP) -o $$here/TAGS)
|
||||
|| (cd $(srcdir) && etags -o $$here/TAGS $(ETAGS_ARGS) $$tags $$unique $(LISP))
|
||||
|
||||
mostlyclean-tags:
|
||||
|
||||
|
||||
@ -1,219 +0,0 @@
|
||||
// Bitset definitions -*- C++ -*-
|
||||
|
||||
// Copyright (C) 2001, 2002 Free Software Foundation
|
||||
//
|
||||
// This file is part of the GNU ISO C++ Library. This library is free
|
||||
// software; you can redistribute it and/or modify it under the
|
||||
// terms of the GNU General Public License as published by the
|
||||
// Free Software Foundation; either version 2, or (at your option)
|
||||
// any later version.
|
||||
|
||||
// This library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
|
||||
// You should have received a copy of the GNU General Public License along
|
||||
// with this library; see the file COPYING. If not, write to the Free
|
||||
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
||||
// USA.
|
||||
|
||||
// As a special exception, you may use this file as part of a free software
|
||||
// library without restriction. Specifically, if other files instantiate
|
||||
// templates or use macros or inline functions from this file, or you compile
|
||||
// this file and link it with other files to produce an executable, this
|
||||
// file does not by itself cause the resulting executable to be covered by
|
||||
// the GNU General Public License. This exception does not however
|
||||
// invalidate any other reasons why the executable file might be covered by
|
||||
// the GNU General Public License.
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <bitset>
|
||||
|
||||
//
|
||||
// Definitions of non-inline functions from the single-word version of
|
||||
// _Base_bitset.
|
||||
//
|
||||
|
||||
std::size_t
|
||||
std::_Base_bitset<1>::_M_do_find_first(std::size_t __not_found) const
|
||||
{
|
||||
_WordT __thisword = _M_w;
|
||||
|
||||
if ( __thisword != static_cast<_WordT>(0) ) {
|
||||
// find byte within word
|
||||
for (std::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 + _S_first_one[__this_byte];
|
||||
|
||||
__thisword >>= CHAR_BIT;
|
||||
}
|
||||
}
|
||||
// not found, so return a value that indicates failure.
|
||||
return __not_found;
|
||||
}
|
||||
|
||||
std::size_t
|
||||
std::_Base_bitset<1>::_M_do_find_next(std::size_t __prev,
|
||||
std::size_t __not_found) const
|
||||
{
|
||||
// make bound inclusive
|
||||
++__prev;
|
||||
|
||||
// check out of bounds
|
||||
if ( __prev >= _GLIBCPP_BITSET_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 ( std::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 + _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
|
||||
|
||||
|
||||
// Lookup tables for find and count operations. In _S_bit_count, the value
|
||||
// *at* an index is the number of bits set *in* that index.
|
||||
unsigned char std::_S_bit_count[256] =
|
||||
{
|
||||
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 _S_bit_count
|
||||
|
||||
unsigned char std::_S_first_one[256] =
|
||||
{
|
||||
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 _S_first_one
|
||||
|
||||
Loading…
Reference in New Issue
Block a user