The move / swap members were not correctly taking all of the possible states of the basic_stringbuf into account. Just rewrote these members. Test included. This fixes http://llvm.org/bugs/show_bug.cgi?id=15659.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@178690 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant
parent
cf31d3864e
commit
4aa8b06e67
156
include/sstream
156
include/sstream
@ -260,17 +260,36 @@ template <class _CharT, class _Traits, class _Allocator>
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basic_stringbuf<_CharT, _Traits, _Allocator>::basic_stringbuf(basic_stringbuf&& __rhs)
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: __mode_(__rhs.__mode_)
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{
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ptrdiff_t __ninp = __rhs.gptr() - __rhs.eback();
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ptrdiff_t __einp = __rhs.egptr() - __rhs.eback();
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ptrdiff_t __nout = __rhs.pptr() - __rhs.pbase();
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ptrdiff_t __eout = __rhs.epptr() - __rhs.pbase();
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ptrdiff_t __hm = __rhs.__hm_ - __rhs.pbase();
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char_type* __p = const_cast<char_type*>(__rhs.__str_.data());
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ptrdiff_t __binp = -1;
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ptrdiff_t __ninp = -1;
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ptrdiff_t __einp = -1;
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if (__rhs.eback() != nullptr)
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{
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__binp = __rhs.eback() - __p;
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__ninp = __rhs.gptr() - __p;
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__einp = __rhs.egptr() - __p;
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}
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ptrdiff_t __bout = -1;
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ptrdiff_t __nout = -1;
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ptrdiff_t __eout = -1;
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if (__rhs.pbase() != nullptr)
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{
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__bout = __rhs.pbase() - __p;
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__nout = __rhs.pptr() - __p;
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__eout = __rhs.epptr() - __p;
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}
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ptrdiff_t __hm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
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__str_ = _VSTD::move(__rhs.__str_);
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char_type* __p = const_cast<char_type*>(__str_.data());
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this->setg(__p, __p + __ninp, __p + __einp);
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this->setp(__p, __p + __eout);
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__p = const_cast<char_type*>(__str_.data());
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if (__binp != -1)
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this->setg(__p + __binp, __p + __ninp, __p + __einp);
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if (__bout != -1)
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{
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this->setp(__p + __bout, __p + __eout);
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this->pbump(__nout);
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__hm_ = __p + __hm;
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}
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__hm_ = __hm == -1 ? nullptr : __p + __hm;
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__p = const_cast<char_type*>(__rhs.__str_.data());
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__rhs.setg(__p, __p, __p);
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__rhs.setp(__p, __p);
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@ -282,18 +301,37 @@ template <class _CharT, class _Traits, class _Allocator>
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basic_stringbuf<_CharT, _Traits, _Allocator>&
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basic_stringbuf<_CharT, _Traits, _Allocator>::operator=(basic_stringbuf&& __rhs)
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{
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ptrdiff_t __ninp = __rhs.gptr() - __rhs.eback();
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ptrdiff_t __einp = __rhs.egptr() - __rhs.eback();
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ptrdiff_t __nout = __rhs.pptr() - __rhs.pbase();
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ptrdiff_t __eout = __rhs.epptr() - __rhs.pbase();
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ptrdiff_t __hm = __rhs.__hm_ - __rhs.pbase();
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__mode_ = __rhs.__mode_;
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char_type* __p = const_cast<char_type*>(__rhs.__str_.data());
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ptrdiff_t __binp = -1;
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ptrdiff_t __ninp = -1;
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ptrdiff_t __einp = -1;
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if (__rhs.eback() != nullptr)
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{
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__binp = __rhs.eback() - __p;
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__ninp = __rhs.gptr() - __p;
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__einp = __rhs.egptr() - __p;
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}
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ptrdiff_t __bout = -1;
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ptrdiff_t __nout = -1;
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ptrdiff_t __eout = -1;
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if (__rhs.pbase() != nullptr)
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{
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__bout = __rhs.pbase() - __p;
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__nout = __rhs.pptr() - __p;
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__eout = __rhs.epptr() - __p;
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}
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ptrdiff_t __hm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
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__str_ = _VSTD::move(__rhs.__str_);
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char_type* __p = const_cast<char_type*>(__str_.data());
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this->setg(__p, __p + __ninp, __p + __einp);
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this->setp(__p, __p + __eout);
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__p = const_cast<char_type*>(__str_.data());
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if (__binp != -1)
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this->setg(__p + __binp, __p + __ninp, __p + __einp);
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if (__bout != -1)
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{
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this->setp(__p + __bout, __p + __eout);
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this->pbump(__nout);
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__hm_ = __p + __hm;
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}
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__hm_ = __hm == -1 ? nullptr : __p + __hm;
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__mode_ = __rhs.__mode_;
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__p = const_cast<char_type*>(__rhs.__str_.data());
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__rhs.setg(__p, __p, __p);
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__rhs.setp(__p, __p);
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@ -308,28 +346,74 @@ template <class _CharT, class _Traits, class _Allocator>
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void
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basic_stringbuf<_CharT, _Traits, _Allocator>::swap(basic_stringbuf& __rhs)
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{
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ptrdiff_t __rninp = __rhs.gptr() - __rhs.eback();
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ptrdiff_t __reinp = __rhs.egptr() - __rhs.eback();
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ptrdiff_t __rnout = __rhs.pptr() - __rhs.pbase();
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ptrdiff_t __reout = __rhs.epptr() - __rhs.pbase();
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ptrdiff_t __rhm = __rhs.__hm_ - __rhs.pbase();
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ptrdiff_t __lninp = this->gptr() - this->eback();
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ptrdiff_t __leinp = this->egptr() - this->eback();
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ptrdiff_t __lnout = this->pptr() - this->pbase();
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ptrdiff_t __leout = this->epptr() - this->pbase();
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ptrdiff_t __lhm = this->__hm_ - this->pbase();
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char_type* __p = const_cast<char_type*>(__rhs.__str_.data());
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ptrdiff_t __rbinp = -1;
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ptrdiff_t __rninp = -1;
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ptrdiff_t __reinp = -1;
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if (__rhs.eback() != nullptr)
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{
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__rbinp = __rhs.eback() - __p;
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__rninp = __rhs.gptr() - __p;
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__reinp = __rhs.egptr() - __p;
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}
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ptrdiff_t __rbout = -1;
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ptrdiff_t __rnout = -1;
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ptrdiff_t __reout = -1;
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if (__rhs.pbase() != nullptr)
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{
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__rbout = __rhs.pbase() - __p;
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__rnout = __rhs.pptr() - __p;
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__reout = __rhs.epptr() - __p;
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}
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ptrdiff_t __rhm = __rhs.__hm_ == nullptr ? -1 : __rhs.__hm_ - __p;
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__p = const_cast<char_type*>(__str_.data());
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ptrdiff_t __lbinp = -1;
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ptrdiff_t __lninp = -1;
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ptrdiff_t __leinp = -1;
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if (this->eback() != nullptr)
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{
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__lbinp = this->eback() - __p;
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__lninp = this->gptr() - __p;
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__leinp = this->egptr() - __p;
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}
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ptrdiff_t __lbout = -1;
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ptrdiff_t __lnout = -1;
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ptrdiff_t __leout = -1;
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if (this->pbase() != nullptr)
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{
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__lbout = this->pbase() - __p;
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__lnout = this->pptr() - __p;
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__leout = this->epptr() - __p;
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}
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ptrdiff_t __lhm = __hm_ == nullptr ? -1 : __hm_ - __p;
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_VSTD::swap(__mode_, __rhs.__mode_);
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__str_.swap(__rhs.__str_);
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char_type* __p = const_cast<char_type*>(__str_.data());
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this->setg(__p, __p + __rninp, __p + __reinp);
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this->setp(__p, __p + __reout);
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__p = const_cast<char_type*>(__str_.data());
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if (__rbinp != -1)
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this->setg(__p + __rbinp, __p + __rninp, __p + __reinp);
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else
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this->setg(nullptr, nullptr, nullptr);
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if (__rbout != -1)
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{
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this->setp(__p + __rbout, __p + __reout);
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this->pbump(__rnout);
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__hm_ = __p + __rhm;
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}
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else
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this->setp(nullptr, nullptr);
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__hm_ = __rhm == -1 ? nullptr : __p + __rhm;
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__p = const_cast<char_type*>(__rhs.__str_.data());
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__rhs.setg(__p, __p + __lninp, __p + __leinp);
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__rhs.setp(__p, __p + __leout);
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if (__lbinp != -1)
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__rhs.setg(__p + __lbinp, __p + __lninp, __p + __leinp);
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else
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__rhs.setg(nullptr, nullptr, nullptr);
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if (__lbout != -1)
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{
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__rhs.setp(__p + __lbout, __p + __leout);
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__rhs.pbump(__lnout);
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__rhs.__hm_ = __p + __lhm;
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}
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else
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__rhs.setp(nullptr, nullptr);
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__rhs.__hm_ = __lhm == -1 ? nullptr : __p + __lhm;
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locale __tl = __rhs.getloc();
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__rhs.pubimbue(this->getloc());
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this->pubimbue(__tl);
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@ -0,0 +1,37 @@
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <sstream>
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// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
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// class basic_stringstream
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// basic_stringstream(basic_stringstream&& rhs);
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#include <sstream>
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#include <vector>
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#include <string>
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#include <cassert>
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int main()
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{
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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std::vector<std::istringstream> vecis;
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vecis.push_back(std::istringstream());
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vecis.back().str("hub started at [00 6b 8b 45 69]");
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vecis.push_back(std::istringstream());
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vecis.back().str("hub started at [00 6b 8b 45 69]");
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for (int n = 0; n < vecis.size(); n++)
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{
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assert(vecis[n].str().size() == 31);
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vecis[n].seekg(0, std::ios_base::beg);
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assert(vecis[n].str().size() == 31);
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}
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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}
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