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freebsd/contrib/libc++/include/__bit_reference
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Dimitry Andric e8948c9522 Merge clang, llvm, lld, lldb, compiler-rt and libc++ 5.0.0 release. 
MFC r309126 (by emaste):

  Correct lld llvm-tblgen dependency file name

MFC r309169:

  Get rid of separate Subversion mergeinfo properties for llvm-dwarfdump
  and llvm-lto.  The mergeinfo confuses Subversion enormously, and these
  directories will just use the mergeinfo for llvm itself.

MFC r312765:

  Pull in r276136 from upstream llvm trunk (by Wei Mi):

    Use ValueOffsetPair to enhance value reuse during SCEV expansion.

    In D12090, the ExprValueMap was added to reuse existing value during
    SCEV expansion. However, const folding and sext/zext distribution can
    make the reuse still difficult.

    A simplified case is: suppose we know S1 expands to V1 in
    ExprValueMap, and
      S1 = S2 + C_a
      S3 = S2 + C_b
    where C_a and C_b are different SCEVConstants. Then we'd like to
    expand S3 as V1 - C_a + C_b instead of expanding S2 literally. It is
    helpful when S2 is a complex SCEV expr and S2 has no entry in
    ExprValueMap, which is usually caused by the fact that S3 is
    generated from S1 after const folding.

    In order to do that, we represent ExprValueMap as a mapping from SCEV
    to ValueOffsetPair. We will save both S1->{V1, 0} and S2->{V1, C_a}
    into the ExprValueMap when we create SCEV for V1. When S3 is
    expanded, it will first expand S2 to V1 - C_a because of S2->{V1,
    C_a} in the map, then expand S3 to V1 - C_a + C_b.

    Differential Revision: https://reviews.llvm.org/D21313

  This should fix assertion failures when building OpenCV >= 3.1.

  PR:		215649

MFC r312831:

  Revert r312765 for now, since it causes assertions when building
  lang/spidermonkey24.

  Reported by:	antoine
  PR:		215649

MFC r316511 (by jhb):

  Add an implementation of __ffssi2() derived from __ffsdi2().

  Newer versions of GCC include an __ffssi2() symbol in libgcc and the
  compiler can emit calls to it in generated code.  This is true for at
  least GCC 6.2 when compiling world for mips and mips64.

  Reviewed by:	jmallett, dim
  Sponsored by:	DARPA / AFRL
  Differential Revision:	https://reviews.freebsd.org/D10086

MFC r318601 (by adrian):

  [libcompiler-rt] add bswapdi2/bswapsi2

  This is required for mips gcc 6.3 userland to build/run.

  Reviewed by:	emaste, dim
  Approved by:	emaste
  Differential Revision:	https://reviews.freebsd.org/D10838

MFC r318884 (by emaste):

  lldb: map TRAP_CAP to a trace trap

  In the absense of a more specific handler for TRAP_CAP (generated by
  ENOTCAPABLE or ECAPMODE while in capability mode) treat it as a trace
  trap.

  Example usage (testing the bug in PR219173):

  % proccontrol -m trapcap lldb usr.bin/hexdump/obj/hexdump -- -Cv -s 1 /bin/ls
  ...
  (lldb) run
  Process 12980 launching
  Process 12980 launched: '.../usr.bin/hexdump/obj/hexdump' (x86_64)
  Process 12980 stopped
  * thread #1, stop reason = trace
      frame #0: 0x0000004b80c65f1a libc.so.7`__sys_lseek + 10
  ...

  In the future we should have LLDB control the trapcap procctl itself
  (as it does with ASLR), as well as report a specific stop reason.
  This change eliminates an assertion failure from LLDB for now.

MFC r319796:

  Remove a few unneeded files from libllvm, libclang and liblldb.

MFC r319885 (by emaste):

  lld: ELF: Fix ICF crash on absolute symbol relocations.

  If two sections contained relocations to absolute symbols with the same
  value we would crash when trying to access their sections. Add a check that
  both symbols point to sections before accessing their sections, and treat
  absolute symbols as equal if their values are equal.

  Obtained from:	LLD commit r292578

MFC r319918:

  Revert r319796 for now, it can cause undefined references when linking
  in some circumstances.

  Reported by:	Shawn Webb <[email protected]>

MFC r319957 (by emaste):

  lld: Add armelf emulation mode

  Obtained from:	LLD r305375

MFC r321369:

  Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to
  5.0.0 (trunk r308421).  Upstream has branched for the 5.0.0 release,
  which should be in about a month.  Please report bugs and regressions,
  so we can get them into the release.

  Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11
  support to build; see UPDATING for more information.

MFC r321420:

  Add a few more object files to liblldb, which should solve errors when
  linking the lldb executable in some cases.  In particular, when the
  -ffunction-sections -fdata-sections options are turned off, or
  ineffective.

  Reported by:	Shawn Webb, Mark Millard

MFC r321433:

  Cleanup stale Options.inc files from the previous libllvm build for
  clang 4.0.0.  Otherwise, these can get included before the two newly
  generated ones (which are different) for clang 5.0.0.

  Reported by:	Mark Millard

MFC r321439 (by bdrewery):

  Move llvm Options.inc hack from r321433 for NO_CLEAN to lib/clang/libllvm.

  The files are only ever generated to .OBJDIR, not to WORLDTMP (as a
  sysroot) and are only ever included from a compilation.  So using
  a beforebuild target here removes the file before the compilation
  tries to include it.

MFC r321664:

  Pull in r308891 from upstream llvm trunk (by Benjamin Kramer):

    [CodeGenPrepare] Cut off FindAllMemoryUses if there are too many uses.

    This avoids excessive compile time. The case I'm looking at is
    Function.cpp from an old version of LLVM that still had the giant
    memcmp string matcher in it. Before r308322 this compiled in about 2
    minutes, after it, clang takes infinite* time to compile it. With
    this patch we're at 5 min, which is still bad but this is a
    pathological case.

    The cut off at 20 uses was chosen by looking at other cut-offs in LLVM
    for user scanning. It's probably too high, but does the job and is
    very unlikely to regress anything.

    Fixes PR33900.

    * I'm impatient and aborted after 15 minutes, on the bug report it was
      killed after 2h.

  Pull in r308986 from upstream llvm trunk (by Simon Pilgrim):

    [X86][CGP] Reduce memcmp() expansion to 2 load pairs (PR33914)

    D35067/rL308322 attempted to support up to 4 load pairs for memcmp
    inlining which resulted in regressions for some optimized libc memcmp
    implementations (PR33914).

    Until we can match these more optimal cases, this patch reduces the
    memcmp expansion to a maximum of 2 load pairs (which matches what we
    do for -Os).

    This patch should be considered for the 5.0.0 release branch as well

    Differential Revision: https://reviews.llvm.org/D35830

  These fix a hang (or extremely long compile time) when building older
  LLVM ports.

  Reported by:    antoine
  PR:             219139

MFC r321719:

  Pull in r309503 from upstream clang trunk (by Richard Smith):

    PR33902: Invalidate line number cache when adding more text to
    existing buffer.

    This led to crashes as the line number cache would report a bogus
    line number for a line of code, and we'd try to find a nonexistent
    column within the line when printing diagnostics.

  This fixes an assertion when building the graphics/champlain port.

  Reported by:	antoine, kwm
  PR:		219139

MFC r321723:

  Upgrade our copies of clang, llvm, lld and lldb to r309439 from the
  upstream release_50 branch.  This is just after upstream's 5.0.0-rc1.

MFC r322320:

  Upgrade our copies of clang, llvm and libc++ to r310316 from the
  upstream release_50 branch.

MFC r322326 (by emaste):

  lldb: Make i386-*-freebsd expression work on JIT path

  * Enable i386 ABI creation for freebsd
  * Added an extra argument in ABISysV_i386::PrepareTrivialCall for mmap
    syscall
  * Unlike linux, the last argument of mmap is actually 64-bit(off_t).
    This requires us to push an additional word for the higher order bits.
  * Prior to this change, ktrace dump will show mmap failures due to
    invalid argument coming from the 6th mmap argument.

  Submitted by:	Karnajit Wangkhem
  Differential Revision:	https://reviews.llvm.org/D34776

MFC r322360 (by emaste):

  lldb: Report inferior signals as signals, not exceptions, on FreeBSD

  This is the FreeBSD equivalent of LLVM r238549.

  This serves 2 purposes:

  * LLDB should handle inferior process signals SIGSEGV/SIGILL/SIGBUS/
    SIGFPE the way it is suppose to be handled. Prior to this fix these
    signals will neither create a coredump, nor exit from the debugger
    or work for signal handling scenario.
  * eInvalidCrashReason need not report "unknown crash reason" if we have
    a valid si_signo

  llvm.org/pr23699

  Patch by Karnajit Wangkhem

  Differential Revision:  https://reviews.llvm.org/D35223

  Submitted by:	Karnajit Wangkhem
  Obtained from:	LLVM r310591

MFC r322474 (by emaste):

  lld: Add `-z muldefs` option.

  Obtained from:	LLVM r310757

MFC r322740:

  Upgrade our copies of clang, llvm, lld and libc++ to r311219 from the
  upstream release_50 branch.

MFC r322855:

  Upgrade our copies of clang, llvm, lldb and compiler-rt to r311606 from
  the upstream release_50 branch.

  As of this version, lib/msun's trig test should also work correctly
  again (see bug 220989 for more information).

  PR:		220989

MFC r323112:

  Upgrade our copies of clang, llvm, lldb and compiler-rt to r312293 from
  the upstream release_50 branch.  This corresponds to 5.0.0 rc4.

  As of this version, the cad/stepcode port should now compile in a more
  reasonable time on i386 (see bug 221836 for more information).

  PR:		221836

MFC r323245:

  Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to
  5.0.0 release (upstream r312559).

  Release notes for llvm, clang and lld will be available here soon:
  <http://releases.llvm.org/5.0.0/docs/ReleaseNotes.html>
  <http://releases.llvm.org/5.0.0/tools/clang/docs/ReleaseNotes.html>
  <http://releases.llvm.org/5.0.0/tools/lld/docs/ReleaseNotes.html>

  Relnotes:	yes
2017-09-26 19:56:36 +00:00

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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___BIT_REFERENCE
#define _LIBCPP___BIT_REFERENCE
#include <__config>
#include <algorithm>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Cp, bool _IsConst, typename _Cp::__storage_type = 0> class __bit_iterator;
template <class _Cp> class __bit_const_reference;
template <class _Tp>
struct __has_storage_type
{
static const bool value = false;
};
template <class _Cp, bool = __has_storage_type<_Cp>::value>
class __bit_reference
{
typedef typename _Cp::__storage_type __storage_type;
typedef typename _Cp::__storage_pointer __storage_pointer;
__storage_pointer __seg_;
__storage_type __mask_;
friend typename _Cp::__self;
friend class __bit_const_reference<_Cp>;
friend class __bit_iterator<_Cp, false>;
public:
_LIBCPP_INLINE_VISIBILITY operator bool() const _NOEXCEPT
{return static_cast<bool>(*__seg_ & __mask_);}
_LIBCPP_INLINE_VISIBILITY bool operator ~() const _NOEXCEPT
{return !static_cast<bool>(*this);}
_LIBCPP_INLINE_VISIBILITY
__bit_reference& operator=(bool __x) _NOEXCEPT
{
if (__x)
*__seg_ |= __mask_;
else
*__seg_ &= ~__mask_;
return *this;
}
_LIBCPP_INLINE_VISIBILITY
__bit_reference& operator=(const __bit_reference& __x) _NOEXCEPT
{return operator=(static_cast<bool>(__x));}
_LIBCPP_INLINE_VISIBILITY void flip() _NOEXCEPT {*__seg_ ^= __mask_;}
_LIBCPP_INLINE_VISIBILITY __bit_iterator<_Cp, false> operator&() const _NOEXCEPT
{return __bit_iterator<_Cp, false>(__seg_, static_cast<unsigned>(__ctz(__mask_)));}
private:
_LIBCPP_INLINE_VISIBILITY
__bit_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT
: __seg_(__s), __mask_(__m) {}
};
template <class _Cp>
class __bit_reference<_Cp, false>
{
};
template <class _Cp>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(__bit_reference<_Cp> __x, __bit_reference<_Cp> __y) _NOEXCEPT
{
bool __t = __x;
__x = __y;
__y = __t;
}
template <class _Cp, class _Dp>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(__bit_reference<_Cp> __x, __bit_reference<_Dp> __y) _NOEXCEPT
{
bool __t = __x;
__x = __y;
__y = __t;
}
template <class _Cp>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(__bit_reference<_Cp> __x, bool& __y) _NOEXCEPT
{
bool __t = __x;
__x = __y;
__y = __t;
}
template <class _Cp>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(bool& __x, __bit_reference<_Cp> __y) _NOEXCEPT
{
bool __t = __x;
__x = __y;
__y = __t;
}
template <class _Cp>
class __bit_const_reference
{
typedef typename _Cp::__storage_type __storage_type;
typedef typename _Cp::__const_storage_pointer __storage_pointer;
__storage_pointer __seg_;
__storage_type __mask_;
friend typename _Cp::__self;
friend class __bit_iterator<_Cp, true>;
public:
_LIBCPP_INLINE_VISIBILITY
__bit_const_reference(const __bit_reference<_Cp>& __x) _NOEXCEPT
: __seg_(__x.__seg_), __mask_(__x.__mask_) {}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR operator bool() const _NOEXCEPT
{return static_cast<bool>(*__seg_ & __mask_);}
_LIBCPP_INLINE_VISIBILITY __bit_iterator<_Cp, true> operator&() const _NOEXCEPT
{return __bit_iterator<_Cp, true>(__seg_, static_cast<unsigned>(__ctz(__mask_)));}
private:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR
__bit_const_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT
: __seg_(__s), __mask_(__m) {}
__bit_const_reference& operator=(const __bit_const_reference& __x);
};
// find
template <class _Cp, bool _IsConst>
__bit_iterator<_Cp, _IsConst>
__find_bool_true(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n)
{
typedef __bit_iterator<_Cp, _IsConst> _It;
typedef typename _It::__storage_type __storage_type;
static const int __bits_per_word = _It::__bits_per_word;
// do first partial word
if (__first.__ctz_ != 0)
{
__storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
__storage_type __dn = _VSTD::min(__clz_f, __n);
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__storage_type __b = *__first.__seg_ & __m;
if (__b)
return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__ctz(__b)));
if (__n == __dn)
return __first + __n;
__n -= __dn;
++__first.__seg_;
}
// do middle whole words
for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
if (*__first.__seg_)
return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__ctz(*__first.__seg_)));
// do last partial word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b = *__first.__seg_ & __m;
if (__b)
return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__ctz(__b)));
}
return _It(__first.__seg_, static_cast<unsigned>(__n));
}
template <class _Cp, bool _IsConst>
__bit_iterator<_Cp, _IsConst>
__find_bool_false(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n)
{
typedef __bit_iterator<_Cp, _IsConst> _It;
typedef typename _It::__storage_type __storage_type;
const int __bits_per_word = _It::__bits_per_word;
// do first partial word
if (__first.__ctz_ != 0)
{
__storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
__storage_type __dn = _VSTD::min(__clz_f, __n);
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__storage_type __b = ~*__first.__seg_ & __m;
if (__b)
return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__ctz(__b)));
if (__n == __dn)
return __first + __n;
__n -= __dn;
++__first.__seg_;
}
// do middle whole words
for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
{
__storage_type __b = ~*__first.__seg_;
if (__b)
return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__ctz(__b)));
}
// do last partial word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b = ~*__first.__seg_ & __m;
if (__b)
return _It(__first.__seg_, static_cast<unsigned>(_VSTD::__ctz(__b)));
}
return _It(__first.__seg_, static_cast<unsigned>(__n));
}
template <class _Cp, bool _IsConst, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
__bit_iterator<_Cp, _IsConst>
find(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value_)
{
if (static_cast<bool>(__value_))
return __find_bool_true(__first, static_cast<typename _Cp::size_type>(__last - __first));
return __find_bool_false(__first, static_cast<typename _Cp::size_type>(__last - __first));
}
// count
template <class _Cp, bool _IsConst>
typename __bit_iterator<_Cp, _IsConst>::difference_type
__count_bool_true(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n)
{
typedef __bit_iterator<_Cp, _IsConst> _It;
typedef typename _It::__storage_type __storage_type;
typedef typename _It::difference_type difference_type;
const int __bits_per_word = _It::__bits_per_word;
difference_type __r = 0;
// do first partial word
if (__first.__ctz_ != 0)
{
__storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
__storage_type __dn = _VSTD::min(__clz_f, __n);
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__r = _VSTD::__pop_count(*__first.__seg_ & __m);
__n -= __dn;
++__first.__seg_;
}
// do middle whole words
for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
__r += _VSTD::__pop_count(*__first.__seg_);
// do last partial word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
__r += _VSTD::__pop_count(*__first.__seg_ & __m);
}
return __r;
}
template <class _Cp, bool _IsConst>
typename __bit_iterator<_Cp, _IsConst>::difference_type
__count_bool_false(__bit_iterator<_Cp, _IsConst> __first, typename _Cp::size_type __n)
{
typedef __bit_iterator<_Cp, _IsConst> _It;
typedef typename _It::__storage_type __storage_type;
typedef typename _It::difference_type difference_type;
const int __bits_per_word = _It::__bits_per_word;
difference_type __r = 0;
// do first partial word
if (__first.__ctz_ != 0)
{
__storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
__storage_type __dn = _VSTD::min(__clz_f, __n);
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__r = _VSTD::__pop_count(~*__first.__seg_ & __m);
__n -= __dn;
++__first.__seg_;
}
// do middle whole words
for (; __n >= __bits_per_word; ++__first.__seg_, __n -= __bits_per_word)
__r += _VSTD::__pop_count(~*__first.__seg_);
// do last partial word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
__r += _VSTD::__pop_count(~*__first.__seg_ & __m);
}
return __r;
}
template <class _Cp, bool _IsConst, class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
typename __bit_iterator<_Cp, _IsConst>::difference_type
count(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, const _Tp& __value_)
{
if (static_cast<bool>(__value_))
return __count_bool_true(__first, static_cast<typename _Cp::size_type>(__last - __first));
return __count_bool_false(__first, static_cast<typename _Cp::size_type>(__last - __first));
}
// fill_n
template <class _Cp>
void
__fill_n_false(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n)
{
typedef __bit_iterator<_Cp, false> _It;
typedef typename _It::__storage_type __storage_type;
const int __bits_per_word = _It::__bits_per_word;
// do first partial word
if (__first.__ctz_ != 0)
{
__storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
__storage_type __dn = _VSTD::min(__clz_f, __n);
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
*__first.__seg_ &= ~__m;
__n -= __dn;
++__first.__seg_;
}
// do middle whole words
__storage_type __nw = __n / __bits_per_word;
_VSTD::memset(_VSTD::__to_raw_pointer(__first.__seg_), 0, __nw * sizeof(__storage_type));
__n -= __nw * __bits_per_word;
// do last partial word
if (__n > 0)
{
__first.__seg_ += __nw;
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
*__first.__seg_ &= ~__m;
}
}
template <class _Cp>
void
__fill_n_true(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n)
{
typedef __bit_iterator<_Cp, false> _It;
typedef typename _It::__storage_type __storage_type;
const int __bits_per_word = _It::__bits_per_word;
// do first partial word
if (__first.__ctz_ != 0)
{
__storage_type __clz_f = static_cast<__storage_type>(__bits_per_word - __first.__ctz_);
__storage_type __dn = _VSTD::min(__clz_f, __n);
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
*__first.__seg_ |= __m;
__n -= __dn;
++__first.__seg_;
}
// do middle whole words
__storage_type __nw = __n / __bits_per_word;
_VSTD::memset(_VSTD::__to_raw_pointer(__first.__seg_), -1, __nw * sizeof(__storage_type));
__n -= __nw * __bits_per_word;
// do last partial word
if (__n > 0)
{
__first.__seg_ += __nw;
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
*__first.__seg_ |= __m;
}
}
template <class _Cp>
inline _LIBCPP_INLINE_VISIBILITY
void
fill_n(__bit_iterator<_Cp, false> __first, typename _Cp::size_type __n, bool __value_)
{
if (__n > 0)
{
if (__value_)
__fill_n_true(__first, __n);
else
__fill_n_false(__first, __n);
}
}
// fill
template <class _Cp>
inline _LIBCPP_INLINE_VISIBILITY
void
fill(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __last, bool __value_)
{
_VSTD::fill_n(__first, static_cast<typename _Cp::size_type>(__last - __first), __value_);
}
// copy
template <class _Cp, bool _IsConst>
__bit_iterator<_Cp, false>
__copy_aligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
__bit_iterator<_Cp, false> __result)
{
typedef __bit_iterator<_Cp, _IsConst> _In;
typedef typename _In::difference_type difference_type;
typedef typename _In::__storage_type __storage_type;
const int __bits_per_word = _In::__bits_per_word;
difference_type __n = __last - __first;
if (__n > 0)
{
// do first word
if (__first.__ctz_ != 0)
{
unsigned __clz = __bits_per_word - __first.__ctz_;
difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz), __n);
__n -= __dn;
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
__storage_type __b = *__first.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b;
__result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
__result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
++__first.__seg_;
// __first.__ctz_ = 0;
}
// __first.__ctz_ == 0;
// do middle words
__storage_type __nw = __n / __bits_per_word;
_VSTD::memmove(_VSTD::__to_raw_pointer(__result.__seg_),
_VSTD::__to_raw_pointer(__first.__seg_),
__nw * sizeof(__storage_type));
__n -= __nw * __bits_per_word;
__result.__seg_ += __nw;
// do last word
if (__n > 0)
{
__first.__seg_ += __nw;
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b = *__first.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b;
__result.__ctz_ = static_cast<unsigned>(__n);
}
}
return __result;
}
template <class _Cp, bool _IsConst>
__bit_iterator<_Cp, false>
__copy_unaligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
__bit_iterator<_Cp, false> __result)
{
typedef __bit_iterator<_Cp, _IsConst> _In;
typedef typename _In::difference_type difference_type;
typedef typename _In::__storage_type __storage_type;
static const int __bits_per_word = _In::__bits_per_word;
difference_type __n = __last - __first;
if (__n > 0)
{
// do first word
if (__first.__ctz_ != 0)
{
unsigned __clz_f = __bits_per_word - __first.__ctz_;
difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz_f), __n);
__n -= __dn;
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__storage_type __b = *__first.__seg_ & __m;
unsigned __clz_r = __bits_per_word - __result.__ctz_;
__storage_type __ddn = _VSTD::min<__storage_type>(__dn, __clz_r);
__m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
*__result.__seg_ &= ~__m;
if (__result.__ctz_ > __first.__ctz_)
*__result.__seg_ |= __b << (__result.__ctz_ - __first.__ctz_);
else
*__result.__seg_ |= __b >> (__first.__ctz_ - __result.__ctz_);
__result.__seg_ += (__ddn + __result.__ctz_) / __bits_per_word;
__result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_) % __bits_per_word);
__dn -= __ddn;
if (__dn > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __dn);
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b >> (__first.__ctz_ + __ddn);
__result.__ctz_ = static_cast<unsigned>(__dn);
}
++__first.__seg_;
// __first.__ctz_ = 0;
}
// __first.__ctz_ == 0;
// do middle words
unsigned __clz_r = __bits_per_word - __result.__ctz_;
__storage_type __m = ~__storage_type(0) << __result.__ctz_;
for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_)
{
__storage_type __b = *__first.__seg_;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b << __result.__ctz_;
++__result.__seg_;
*__result.__seg_ &= __m;
*__result.__seg_ |= __b >> __clz_r;
}
// do last word
if (__n > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b = *__first.__seg_ & __m;
__storage_type __dn = _VSTD::min(__n, static_cast<difference_type>(__clz_r));
__m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b << __result.__ctz_;
__result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
__result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
__n -= __dn;
if (__n > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __n);
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b >> __dn;
__result.__ctz_ = static_cast<unsigned>(__n);
}
}
}
return __result;
}
template <class _Cp, bool _IsConst>
inline _LIBCPP_INLINE_VISIBILITY
__bit_iterator<_Cp, false>
copy(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
{
if (__first.__ctz_ == __result.__ctz_)
return __copy_aligned(__first, __last, __result);
return __copy_unaligned(__first, __last, __result);
}
// copy_backward
template <class _Cp, bool _IsConst>
__bit_iterator<_Cp, false>
__copy_backward_aligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
__bit_iterator<_Cp, false> __result)
{
typedef __bit_iterator<_Cp, _IsConst> _In;
typedef typename _In::difference_type difference_type;
typedef typename _In::__storage_type __storage_type;
const int __bits_per_word = _In::__bits_per_word;
difference_type __n = __last - __first;
if (__n > 0)
{
// do first word
if (__last.__ctz_ != 0)
{
difference_type __dn = _VSTD::min(static_cast<difference_type>(__last.__ctz_), __n);
__n -= __dn;
unsigned __clz = __bits_per_word - __last.__ctz_;
__storage_type __m = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz);
__storage_type __b = *__last.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b;
__result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) +
__result.__ctz_) % __bits_per_word);
// __last.__ctz_ = 0
}
// __last.__ctz_ == 0 || __n == 0
// __result.__ctz_ == 0 || __n == 0
// do middle words
__storage_type __nw = __n / __bits_per_word;
__result.__seg_ -= __nw;
__last.__seg_ -= __nw;
_VSTD::memmove(_VSTD::__to_raw_pointer(__result.__seg_),
_VSTD::__to_raw_pointer(__last.__seg_),
__nw * sizeof(__storage_type));
__n -= __nw * __bits_per_word;
// do last word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) << (__bits_per_word - __n);
__storage_type __b = *--__last.__seg_ & __m;
*--__result.__seg_ &= ~__m;
*__result.__seg_ |= __b;
__result.__ctz_ = static_cast<unsigned>(-__n & (__bits_per_word - 1));
}
}
return __result;
}
template <class _Cp, bool _IsConst>
__bit_iterator<_Cp, false>
__copy_backward_unaligned(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last,
__bit_iterator<_Cp, false> __result)
{
typedef __bit_iterator<_Cp, _IsConst> _In;
typedef typename _In::difference_type difference_type;
typedef typename _In::__storage_type __storage_type;
const int __bits_per_word = _In::__bits_per_word;
difference_type __n = __last - __first;
if (__n > 0)
{
// do first word
if (__last.__ctz_ != 0)
{
difference_type __dn = _VSTD::min(static_cast<difference_type>(__last.__ctz_), __n);
__n -= __dn;
unsigned __clz_l = __bits_per_word - __last.__ctz_;
__storage_type __m = (~__storage_type(0) << (__last.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_l);
__storage_type __b = *__last.__seg_ & __m;
unsigned __clz_r = __bits_per_word - __result.__ctz_;
__storage_type __ddn = _VSTD::min(__dn, static_cast<difference_type>(__result.__ctz_));
if (__ddn > 0)
{
__m = (~__storage_type(0) << (__result.__ctz_ - __ddn)) & (~__storage_type(0) >> __clz_r);
*__result.__seg_ &= ~__m;
if (__result.__ctz_ > __last.__ctz_)
*__result.__seg_ |= __b << (__result.__ctz_ - __last.__ctz_);
else
*__result.__seg_ |= __b >> (__last.__ctz_ - __result.__ctz_);
__result.__ctz_ = static_cast<unsigned>(((-__ddn & (__bits_per_word - 1)) +
__result.__ctz_) % __bits_per_word);
__dn -= __ddn;
}
if (__dn > 0)
{
// __result.__ctz_ == 0
--__result.__seg_;
__result.__ctz_ = static_cast<unsigned>(-__dn & (__bits_per_word - 1));
__m = ~__storage_type(0) << __result.__ctz_;
*__result.__seg_ &= ~__m;
__last.__ctz_ -= __dn + __ddn;
*__result.__seg_ |= __b << (__result.__ctz_ - __last.__ctz_);
}
// __last.__ctz_ = 0
}
// __last.__ctz_ == 0 || __n == 0
// __result.__ctz_ != 0 || __n == 0
// do middle words
unsigned __clz_r = __bits_per_word - __result.__ctz_;
__storage_type __m = ~__storage_type(0) >> __clz_r;
for (; __n >= __bits_per_word; __n -= __bits_per_word)
{
__storage_type __b = *--__last.__seg_;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b >> __clz_r;
*--__result.__seg_ &= __m;
*__result.__seg_ |= __b << __result.__ctz_;
}
// do last word
if (__n > 0)
{
__m = ~__storage_type(0) << (__bits_per_word - __n);
__storage_type __b = *--__last.__seg_ & __m;
__clz_r = __bits_per_word - __result.__ctz_;
__storage_type __dn = _VSTD::min(__n, static_cast<difference_type>(__result.__ctz_));
__m = (~__storage_type(0) << (__result.__ctz_ - __dn)) & (~__storage_type(0) >> __clz_r);
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b >> (__bits_per_word - __result.__ctz_);
__result.__ctz_ = static_cast<unsigned>(((-__dn & (__bits_per_word - 1)) +
__result.__ctz_) % __bits_per_word);
__n -= __dn;
if (__n > 0)
{
// __result.__ctz_ == 0
--__result.__seg_;
__result.__ctz_ = static_cast<unsigned>(-__n & (__bits_per_word - 1));
__m = ~__storage_type(0) << __result.__ctz_;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b << (__result.__ctz_ - (__bits_per_word - __n - __dn));
}
}
}
return __result;
}
template <class _Cp, bool _IsConst>
inline _LIBCPP_INLINE_VISIBILITY
__bit_iterator<_Cp, false>
copy_backward(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
{
if (__last.__ctz_ == __result.__ctz_)
return __copy_backward_aligned(__first, __last, __result);
return __copy_backward_unaligned(__first, __last, __result);
}
// move
template <class _Cp, bool _IsConst>
inline _LIBCPP_INLINE_VISIBILITY
__bit_iterator<_Cp, false>
move(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
{
return _VSTD::copy(__first, __last, __result);
}
// move_backward
template <class _Cp, bool _IsConst>
inline _LIBCPP_INLINE_VISIBILITY
__bit_iterator<_Cp, false>
move_backward(__bit_iterator<_Cp, _IsConst> __first, __bit_iterator<_Cp, _IsConst> __last, __bit_iterator<_Cp, false> __result)
{
return _VSTD::copy_backward(__first, __last, __result);
}
// swap_ranges
template <class __C1, class __C2>
__bit_iterator<__C2, false>
__swap_ranges_aligned(__bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last,
__bit_iterator<__C2, false> __result)
{
typedef __bit_iterator<__C1, false> _I1;
typedef typename _I1::difference_type difference_type;
typedef typename _I1::__storage_type __storage_type;
const int __bits_per_word = _I1::__bits_per_word;
difference_type __n = __last - __first;
if (__n > 0)
{
// do first word
if (__first.__ctz_ != 0)
{
unsigned __clz = __bits_per_word - __first.__ctz_;
difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz), __n);
__n -= __dn;
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
__storage_type __b1 = *__first.__seg_ & __m;
*__first.__seg_ &= ~__m;
__storage_type __b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b1;
*__first.__seg_ |= __b2;
__result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
__result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
++__first.__seg_;
// __first.__ctz_ = 0;
}
// __first.__ctz_ == 0;
// do middle words
for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_, ++__result.__seg_)
swap(*__first.__seg_, *__result.__seg_);
// do last word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b1 = *__first.__seg_ & __m;
*__first.__seg_ &= ~__m;
__storage_type __b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b1;
*__first.__seg_ |= __b2;
__result.__ctz_ = static_cast<unsigned>(__n);
}
}
return __result;
}
template <class __C1, class __C2>
__bit_iterator<__C2, false>
__swap_ranges_unaligned(__bit_iterator<__C1, false> __first, __bit_iterator<__C1, false> __last,
__bit_iterator<__C2, false> __result)
{
typedef __bit_iterator<__C1, false> _I1;
typedef typename _I1::difference_type difference_type;
typedef typename _I1::__storage_type __storage_type;
const int __bits_per_word = _I1::__bits_per_word;
difference_type __n = __last - __first;
if (__n > 0)
{
// do first word
if (__first.__ctz_ != 0)
{
unsigned __clz_f = __bits_per_word - __first.__ctz_;
difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz_f), __n);
__n -= __dn;
__storage_type __m = (~__storage_type(0) << __first.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__storage_type __b1 = *__first.__seg_ & __m;
*__first.__seg_ &= ~__m;
unsigned __clz_r = __bits_per_word - __result.__ctz_;
__storage_type __ddn = _VSTD::min<__storage_type>(__dn, __clz_r);
__m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
__storage_type __b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
if (__result.__ctz_ > __first.__ctz_)
{
unsigned __s = __result.__ctz_ - __first.__ctz_;
*__result.__seg_ |= __b1 << __s;
*__first.__seg_ |= __b2 >> __s;
}
else
{
unsigned __s = __first.__ctz_ - __result.__ctz_;
*__result.__seg_ |= __b1 >> __s;
*__first.__seg_ |= __b2 << __s;
}
__result.__seg_ += (__ddn + __result.__ctz_) / __bits_per_word;
__result.__ctz_ = static_cast<unsigned>((__ddn + __result.__ctz_) % __bits_per_word);
__dn -= __ddn;
if (__dn > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __dn);
__b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
unsigned __s = __first.__ctz_ + __ddn;
*__result.__seg_ |= __b1 >> __s;
*__first.__seg_ |= __b2 << __s;
__result.__ctz_ = static_cast<unsigned>(__dn);
}
++__first.__seg_;
// __first.__ctz_ = 0;
}
// __first.__ctz_ == 0;
// do middle words
__storage_type __m = ~__storage_type(0) << __result.__ctz_;
unsigned __clz_r = __bits_per_word - __result.__ctz_;
for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first.__seg_)
{
__storage_type __b1 = *__first.__seg_;
__storage_type __b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b1 << __result.__ctz_;
*__first.__seg_ = __b2 >> __result.__ctz_;
++__result.__seg_;
__b2 = *__result.__seg_ & ~__m;
*__result.__seg_ &= __m;
*__result.__seg_ |= __b1 >> __clz_r;
*__first.__seg_ |= __b2 << __clz_r;
}
// do last word
if (__n > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b1 = *__first.__seg_ & __m;
*__first.__seg_ &= ~__m;
__storage_type __dn = _VSTD::min<__storage_type>(__n, __clz_r);
__m = (~__storage_type(0) << __result.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
__storage_type __b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b1 << __result.__ctz_;
*__first.__seg_ |= __b2 >> __result.__ctz_;
__result.__seg_ += (__dn + __result.__ctz_) / __bits_per_word;
__result.__ctz_ = static_cast<unsigned>((__dn + __result.__ctz_) % __bits_per_word);
__n -= __dn;
if (__n > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __n);
__b2 = *__result.__seg_ & __m;
*__result.__seg_ &= ~__m;
*__result.__seg_ |= __b1 >> __dn;
*__first.__seg_ |= __b2 << __dn;
__result.__ctz_ = static_cast<unsigned>(__n);
}
}
}
return __result;
}
template <class __C1, class __C2>
inline _LIBCPP_INLINE_VISIBILITY
__bit_iterator<__C2, false>
swap_ranges(__bit_iterator<__C1, false> __first1, __bit_iterator<__C1, false> __last1,
__bit_iterator<__C2, false> __first2)
{
if (__first1.__ctz_ == __first2.__ctz_)
return __swap_ranges_aligned(__first1, __last1, __first2);
return __swap_ranges_unaligned(__first1, __last1, __first2);
}
// rotate
template <class _Cp>
struct __bit_array
{
typedef typename _Cp::difference_type difference_type;
typedef typename _Cp::__storage_type __storage_type;
typedef typename _Cp::__storage_pointer __storage_pointer;
typedef typename _Cp::iterator iterator;
static const unsigned __bits_per_word = _Cp::__bits_per_word;
static const unsigned _Np = 4;
difference_type __size_;
__storage_type __word_[_Np];
_LIBCPP_INLINE_VISIBILITY static difference_type capacity()
{return static_cast<difference_type>(_Np * __bits_per_word);}
_LIBCPP_INLINE_VISIBILITY explicit __bit_array(difference_type __s) : __size_(__s) {}
_LIBCPP_INLINE_VISIBILITY iterator begin()
{
return iterator(pointer_traits<__storage_pointer>::pointer_to(__word_[0]), 0);
}
_LIBCPP_INLINE_VISIBILITY iterator end()
{
return iterator(pointer_traits<__storage_pointer>::pointer_to(__word_[0]) + __size_ / __bits_per_word,
static_cast<unsigned>(__size_ % __bits_per_word));
}
};
template <class _Cp>
__bit_iterator<_Cp, false>
rotate(__bit_iterator<_Cp, false> __first, __bit_iterator<_Cp, false> __middle, __bit_iterator<_Cp, false> __last)
{
typedef __bit_iterator<_Cp, false> _I1;
typedef typename _I1::difference_type difference_type;
difference_type __d1 = __middle - __first;
difference_type __d2 = __last - __middle;
_I1 __r = __first + __d2;
while (__d1 != 0 && __d2 != 0)
{
if (__d1 <= __d2)
{
if (__d1 <= __bit_array<_Cp>::capacity())
{
__bit_array<_Cp> __b(__d1);
_VSTD::copy(__first, __middle, __b.begin());
_VSTD::copy(__b.begin(), __b.end(), _VSTD::copy(__middle, __last, __first));
break;
}
else
{
__bit_iterator<_Cp, false> __mp = _VSTD::swap_ranges(__first, __middle, __middle);
__first = __middle;
__middle = __mp;
__d2 -= __d1;
}
}
else
{
if (__d2 <= __bit_array<_Cp>::capacity())
{
__bit_array<_Cp> __b(__d2);
_VSTD::copy(__middle, __last, __b.begin());
_VSTD::copy_backward(__b.begin(), __b.end(), _VSTD::copy_backward(__first, __middle, __last));
break;
}
else
{
__bit_iterator<_Cp, false> __mp = __first + __d2;
_VSTD::swap_ranges(__first, __mp, __middle);
__first = __mp;
__d1 -= __d2;
}
}
}
return __r;
}
// equal
template <class _Cp, bool _IC1, bool _IC2>
bool
__equal_unaligned(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1,
__bit_iterator<_Cp, _IC2> __first2)
{
typedef __bit_iterator<_Cp, _IC1> _It;
typedef typename _It::difference_type difference_type;
typedef typename _It::__storage_type __storage_type;
static const int __bits_per_word = _It::__bits_per_word;
difference_type __n = __last1 - __first1;
if (__n > 0)
{
// do first word
if (__first1.__ctz_ != 0)
{
unsigned __clz_f = __bits_per_word - __first1.__ctz_;
difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz_f), __n);
__n -= __dn;
__storage_type __m = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz_f - __dn));
__storage_type __b = *__first1.__seg_ & __m;
unsigned __clz_r = __bits_per_word - __first2.__ctz_;
__storage_type __ddn = _VSTD::min<__storage_type>(__dn, __clz_r);
__m = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __ddn));
if (__first2.__ctz_ > __first1.__ctz_)
{
if ((*__first2.__seg_ & __m) != (__b << (__first2.__ctz_ - __first1.__ctz_)))
return false;
}
else
{
if ((*__first2.__seg_ & __m) != (__b >> (__first1.__ctz_ - __first2.__ctz_)))
return false;
}
__first2.__seg_ += (__ddn + __first2.__ctz_) / __bits_per_word;
__first2.__ctz_ = static_cast<unsigned>((__ddn + __first2.__ctz_) % __bits_per_word);
__dn -= __ddn;
if (__dn > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __dn);
if ((*__first2.__seg_ & __m) != (__b >> (__first1.__ctz_ + __ddn)))
return false;
__first2.__ctz_ = static_cast<unsigned>(__dn);
}
++__first1.__seg_;
// __first1.__ctz_ = 0;
}
// __first1.__ctz_ == 0;
// do middle words
unsigned __clz_r = __bits_per_word - __first2.__ctz_;
__storage_type __m = ~__storage_type(0) << __first2.__ctz_;
for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_)
{
__storage_type __b = *__first1.__seg_;
if ((*__first2.__seg_ & __m) != (__b << __first2.__ctz_))
return false;
++__first2.__seg_;
if ((*__first2.__seg_ & ~__m) != (__b >> __clz_r))
return false;
}
// do last word
if (__n > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __n);
__storage_type __b = *__first1.__seg_ & __m;
__storage_type __dn = _VSTD::min(__n, static_cast<difference_type>(__clz_r));
__m = (~__storage_type(0) << __first2.__ctz_) & (~__storage_type(0) >> (__clz_r - __dn));
if ((*__first2.__seg_ & __m) != (__b << __first2.__ctz_))
return false;
__first2.__seg_ += (__dn + __first2.__ctz_) / __bits_per_word;
__first2.__ctz_ = static_cast<unsigned>((__dn + __first2.__ctz_) % __bits_per_word);
__n -= __dn;
if (__n > 0)
{
__m = ~__storage_type(0) >> (__bits_per_word - __n);
if ((*__first2.__seg_ & __m) != (__b >> __dn))
return false;
}
}
}
return true;
}
template <class _Cp, bool _IC1, bool _IC2>
bool
__equal_aligned(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1,
__bit_iterator<_Cp, _IC2> __first2)
{
typedef __bit_iterator<_Cp, _IC1> _It;
typedef typename _It::difference_type difference_type;
typedef typename _It::__storage_type __storage_type;
static const int __bits_per_word = _It::__bits_per_word;
difference_type __n = __last1 - __first1;
if (__n > 0)
{
// do first word
if (__first1.__ctz_ != 0)
{
unsigned __clz = __bits_per_word - __first1.__ctz_;
difference_type __dn = _VSTD::min(static_cast<difference_type>(__clz), __n);
__n -= __dn;
__storage_type __m = (~__storage_type(0) << __first1.__ctz_) & (~__storage_type(0) >> (__clz - __dn));
if ((*__first2.__seg_ & __m) != (*__first1.__seg_ & __m))
return false;
++__first2.__seg_;
++__first1.__seg_;
// __first1.__ctz_ = 0;
// __first2.__ctz_ = 0;
}
// __first1.__ctz_ == 0;
// __first2.__ctz_ == 0;
// do middle words
for (; __n >= __bits_per_word; __n -= __bits_per_word, ++__first1.__seg_, ++__first2.__seg_)
if (*__first2.__seg_ != *__first1.__seg_)
return false;
// do last word
if (__n > 0)
{
__storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
if ((*__first2.__seg_ & __m) != (*__first1.__seg_ & __m))
return false;
}
}
return true;
}
template <class _Cp, bool _IC1, bool _IC2>
inline _LIBCPP_INLINE_VISIBILITY
bool
equal(__bit_iterator<_Cp, _IC1> __first1, __bit_iterator<_Cp, _IC1> __last1, __bit_iterator<_Cp, _IC2> __first2)
{
if (__first1.__ctz_ == __first2.__ctz_)
return __equal_aligned(__first1, __last1, __first2);
return __equal_unaligned(__first1, __last1, __first2);
}
template <class _Cp, bool _IsConst,
typename _Cp::__storage_type>
class __bit_iterator
{
public:
typedef typename _Cp::difference_type difference_type;
typedef bool value_type;
typedef __bit_iterator pointer;
typedef typename conditional<_IsConst, __bit_const_reference<_Cp>, __bit_reference<_Cp> >::type reference;
typedef random_access_iterator_tag iterator_category;
private:
typedef typename _Cp::__storage_type __storage_type;
typedef typename conditional<_IsConst, typename _Cp::__const_storage_pointer,
typename _Cp::__storage_pointer>::type __storage_pointer;
static const unsigned __bits_per_word = _Cp::__bits_per_word;
__storage_pointer __seg_;
unsigned __ctz_;
public:
_LIBCPP_INLINE_VISIBILITY __bit_iterator() _NOEXCEPT
#if _LIBCPP_STD_VER > 11
: __seg_(nullptr), __ctz_(0)
#endif
{}
_LIBCPP_INLINE_VISIBILITY
__bit_iterator(const __bit_iterator<_Cp, false>& __it) _NOEXCEPT
: __seg_(__it.__seg_), __ctz_(__it.__ctz_) {}
_LIBCPP_INLINE_VISIBILITY reference operator*() const _NOEXCEPT
{return reference(__seg_, __storage_type(1) << __ctz_);}
_LIBCPP_INLINE_VISIBILITY __bit_iterator& operator++()
{
if (__ctz_ != __bits_per_word-1)
++__ctz_;
else
{
__ctz_ = 0;
++__seg_;
}
return *this;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator operator++(int)
{
__bit_iterator __tmp = *this;
++(*this);
return __tmp;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator& operator--()
{
if (__ctz_ != 0)
--__ctz_;
else
{
__ctz_ = __bits_per_word - 1;
--__seg_;
}
return *this;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator operator--(int)
{
__bit_iterator __tmp = *this;
--(*this);
return __tmp;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator& operator+=(difference_type __n)
{
if (__n >= 0)
__seg_ += (__n + __ctz_) / __bits_per_word;
else
__seg_ += static_cast<difference_type>(__n - __bits_per_word + __ctz_ + 1)
/ static_cast<difference_type>(__bits_per_word);
__n &= (__bits_per_word - 1);
__ctz_ = static_cast<unsigned>((__n + __ctz_) % __bits_per_word);
return *this;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator& operator-=(difference_type __n)
{
return *this += -__n;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator operator+(difference_type __n) const
{
__bit_iterator __t(*this);
__t += __n;
return __t;
}
_LIBCPP_INLINE_VISIBILITY __bit_iterator operator-(difference_type __n) const
{
__bit_iterator __t(*this);
__t -= __n;
return __t;
}
_LIBCPP_INLINE_VISIBILITY
friend __bit_iterator operator+(difference_type __n, const __bit_iterator& __it) {return __it + __n;}
_LIBCPP_INLINE_VISIBILITY
friend difference_type operator-(const __bit_iterator& __x, const __bit_iterator& __y)
{return (__x.__seg_ - __y.__seg_) * __bits_per_word + __x.__ctz_ - __y.__ctz_;}
_LIBCPP_INLINE_VISIBILITY reference operator[](difference_type __n) const {return *(*this + __n);}
_LIBCPP_INLINE_VISIBILITY friend bool operator==(const __bit_iterator& __x, const __bit_iterator& __y)
{return __x.__seg_ == __y.__seg_ && __x.__ctz_ == __y.__ctz_;}
_LIBCPP_INLINE_VISIBILITY friend bool operator!=(const __bit_iterator& __x, const __bit_iterator& __y)
{return !(__x == __y);}
_LIBCPP_INLINE_VISIBILITY friend bool operator<(const __bit_iterator& __x, const __bit_iterator& __y)
{return __x.__seg_ < __y.__seg_ || (__x.__seg_ == __y.__seg_ && __x.__ctz_ < __y.__ctz_);}
_LIBCPP_INLINE_VISIBILITY friend bool operator>(const __bit_iterator& __x, const __bit_iterator& __y)
{return __y < __x;}
_LIBCPP_INLINE_VISIBILITY friend bool operator<=(const __bit_iterator& __x, const __bit_iterator& __y)
{return !(__y < __x);}
_LIBCPP_INLINE_VISIBILITY friend bool operator>=(const __bit_iterator& __x, const __bit_iterator& __y)
{return !(__x < __y);}
private:
_LIBCPP_INLINE_VISIBILITY
__bit_iterator(__storage_pointer __s, unsigned __ctz) _NOEXCEPT
: __seg_(__s), __ctz_(__ctz) {}
friend typename _Cp::__self;
friend class __bit_reference<_Cp>;
friend class __bit_const_reference<_Cp>;
friend class __bit_iterator<_Cp, true>;
template <class _Dp> friend struct __bit_array;
template <class _Dp> friend void __fill_n_false(__bit_iterator<_Dp, false> __first, typename _Dp::size_type __n);
template <class _Dp> friend void __fill_n_true(__bit_iterator<_Dp, false> __first, typename _Dp::size_type __n);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_aligned(__bit_iterator<_Dp, _IC> __first,
__bit_iterator<_Dp, _IC> __last,
__bit_iterator<_Dp, false> __result);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_unaligned(__bit_iterator<_Dp, _IC> __first,
__bit_iterator<_Dp, _IC> __last,
__bit_iterator<_Dp, false> __result);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> copy(__bit_iterator<_Dp, _IC> __first,
__bit_iterator<_Dp, _IC> __last,
__bit_iterator<_Dp, false> __result);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_backward_aligned(__bit_iterator<_Dp, _IC> __first,
__bit_iterator<_Dp, _IC> __last,
__bit_iterator<_Dp, false> __result);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> __copy_backward_unaligned(__bit_iterator<_Dp, _IC> __first,
__bit_iterator<_Dp, _IC> __last,
__bit_iterator<_Dp, false> __result);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, false> copy_backward(__bit_iterator<_Dp, _IC> __first,
__bit_iterator<_Dp, _IC> __last,
__bit_iterator<_Dp, false> __result);
template <class __C1, class __C2>friend __bit_iterator<__C2, false> __swap_ranges_aligned(__bit_iterator<__C1, false>,
__bit_iterator<__C1, false>,
__bit_iterator<__C2, false>);
template <class __C1, class __C2>friend __bit_iterator<__C2, false> __swap_ranges_unaligned(__bit_iterator<__C1, false>,
__bit_iterator<__C1, false>,
__bit_iterator<__C2, false>);
template <class __C1, class __C2>friend __bit_iterator<__C2, false> swap_ranges(__bit_iterator<__C1, false>,
__bit_iterator<__C1, false>,
__bit_iterator<__C2, false>);
template <class _Dp> friend __bit_iterator<_Dp, false> rotate(__bit_iterator<_Dp, false>,
__bit_iterator<_Dp, false>,
__bit_iterator<_Dp, false>);
template <class _Dp, bool _IC1, bool _IC2> friend bool __equal_aligned(__bit_iterator<_Dp, _IC1>,
__bit_iterator<_Dp, _IC1>,
__bit_iterator<_Dp, _IC2>);
template <class _Dp, bool _IC1, bool _IC2> friend bool __equal_unaligned(__bit_iterator<_Dp, _IC1>,
__bit_iterator<_Dp, _IC1>,
__bit_iterator<_Dp, _IC2>);
template <class _Dp, bool _IC1, bool _IC2> friend bool equal(__bit_iterator<_Dp, _IC1>,
__bit_iterator<_Dp, _IC1>,
__bit_iterator<_Dp, _IC2>);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, _IC> __find_bool_true(__bit_iterator<_Dp, _IC>,
typename _Dp::size_type);
template <class _Dp, bool _IC> friend __bit_iterator<_Dp, _IC> __find_bool_false(__bit_iterator<_Dp, _IC>,
typename _Dp::size_type);
template <class _Dp, bool _IC> friend typename __bit_iterator<_Dp, _IC>::difference_type
__count_bool_true(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
template <class _Dp, bool _IC> friend typename __bit_iterator<_Dp, _IC>::difference_type
__count_bool_false(__bit_iterator<_Dp, _IC>, typename _Dp::size_type);
};
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP___BIT_REFERENCE
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