diff options
Diffstat (limited to 'third_party/libcxx/include/c++/v1/fstream')
| -rw-r--r-- | third_party/libcxx/include/c++/v1/fstream | 1642 |
1 files changed, 1642 insertions, 0 deletions
diff --git a/third_party/libcxx/include/c++/v1/fstream b/third_party/libcxx/include/c++/v1/fstream new file mode 100644 index 0000000..4000be8 --- /dev/null +++ b/third_party/libcxx/include/c++/v1/fstream @@ -0,0 +1,1642 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP_FSTREAM +#define _LIBCPP_FSTREAM + +/* + fstream synopsis + +template <class charT, class traits = char_traits<charT> > +class basic_filebuf + : public basic_streambuf<charT, traits> +{ +public: + typedef charT char_type; + typedef traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; + + // 27.9.1.2 Constructors/destructor: + basic_filebuf(); + basic_filebuf(basic_filebuf&& rhs); + virtual ~basic_filebuf(); + + // 27.9.1.3 Assign/swap: + basic_filebuf& operator=(basic_filebuf&& rhs); + void swap(basic_filebuf& rhs); + + // 27.9.1.4 Members: + bool is_open() const; + basic_filebuf* open(const char* s, ios_base::openmode mode); + basic_filebuf* open(const string& s, ios_base::openmode mode); + basic_filebuf* open(const filesystem::path& p, ios_base::openmode mode); // C++17 + basic_filebuf* close(); + +protected: + // 27.9.1.5 Overridden virtual functions: + virtual streamsize showmanyc(); + virtual int_type underflow(); + virtual int_type uflow(); + virtual int_type pbackfail(int_type c = traits_type::eof()); + virtual int_type overflow (int_type c = traits_type::eof()); + virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* s, streamsize n); + virtual pos_type seekoff(off_type off, ios_base::seekdir way, + ios_base::openmode which = ios_base::in | ios_base::out); + virtual pos_type seekpos(pos_type sp, + ios_base::openmode which = ios_base::in | ios_base::out); + virtual int sync(); + virtual void imbue(const locale& loc); +}; + +template <class charT, class traits> + void + swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y); + +typedef basic_filebuf<char> filebuf; +typedef basic_filebuf<wchar_t> wfilebuf; + +template <class charT, class traits = char_traits<charT> > +class basic_ifstream + : public basic_istream<charT,traits> +{ +public: + typedef charT char_type; + typedef traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; + using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 + + basic_ifstream(); + explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in); + explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in); + template<class T> + explicit basic_ifstream(const T& s, ios_base::openmode mode = ios_base::in); // Since C++17 + basic_ifstream(basic_ifstream&& rhs); + + basic_ifstream& operator=(basic_ifstream&& rhs); + void swap(basic_ifstream& rhs); + + basic_filebuf<char_type, traits_type>* rdbuf() const; + native_handle_type native_handle() const noexcept; // Since C++26 + bool is_open() const; + void open(const char* s, ios_base::openmode mode = ios_base::in); + void open(const string& s, ios_base::openmode mode = ios_base::in); + void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); // C++17 + + void close(); +}; + +template <class charT, class traits> + void + swap(basic_ifstream<charT, traits>& x, basic_ifstream<charT, traits>& y); + +typedef basic_ifstream<char> ifstream; +typedef basic_ifstream<wchar_t> wifstream; + +template <class charT, class traits = char_traits<charT> > +class basic_ofstream + : public basic_ostream<charT,traits> +{ +public: + typedef charT char_type; + typedef traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; + using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 + + basic_ofstream(); + explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out); + explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out); + template<class T> + explicit basic_ofstream(const T& s, ios_base::openmode mode = ios_base::out); // Since C++17 + basic_ofstream(basic_ofstream&& rhs); + + basic_ofstream& operator=(basic_ofstream&& rhs); + void swap(basic_ofstream& rhs); + + basic_filebuf<char_type, traits_type>* rdbuf() const; + native_handle_type native_handle() const noexcept; // Since C++26 + + bool is_open() const; + void open(const char* s, ios_base::openmode mode = ios_base::out); + void open(const string& s, ios_base::openmode mode = ios_base::out); + void open(const filesystem::path& p, + ios_base::openmode mode = ios_base::out); // C++17 + + void close(); +}; + +template <class charT, class traits> + void + swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y); + +typedef basic_ofstream<char> ofstream; +typedef basic_ofstream<wchar_t> wofstream; + +template <class charT, class traits=char_traits<charT> > +class basic_fstream + : public basic_iostream<charT,traits> +{ +public: + typedef charT char_type; + typedef traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; + using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; // Since C++26 + + basic_fstream(); + explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); + explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); + template<class T> + explicit basic_fstream(const T& s, ios_base::openmode mode = ios_base::in | ios_base::out); // Since C++17 + basic_fstream(basic_fstream&& rhs); + + basic_fstream& operator=(basic_fstream&& rhs); + void swap(basic_fstream& rhs); + + basic_filebuf<char_type, traits_type>* rdbuf() const; + native_handle_type native_handle() const noexcept; // Since C++26 + bool is_open() const; + void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out); + void open(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out); + void open(const filesystem::path& s, + ios_base::openmode mode = ios_base::in|ios_base::out); // C++17 + + void close(); +}; + +template <class charT, class traits> + void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y); + +typedef basic_fstream<char> fstream; +typedef basic_fstream<wchar_t> wfstream; + +} // std + +*/ + +#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) +# include <__cxx03/fstream> +#else +# include <__config> + +# if _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION + +# include <__algorithm/max.h> +# include <__assert> +# include <__filesystem/path.h> +# include <__fwd/fstream.h> +# include <__locale> +# include <__memory/addressof.h> +# include <__memory/unique_ptr.h> +# include <__ostream/basic_ostream.h> +# include <__type_traits/enable_if.h> +# include <__type_traits/is_same.h> +# include <__utility/move.h> +# include <__utility/swap.h> +# include <__utility/unreachable.h> +# include <cstdio> +# include <istream> +# include <streambuf> +# include <typeinfo> +# include <version> + +# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +# pragma GCC system_header +# endif + +_LIBCPP_PUSH_MACROS +# include <__undef_macros> + +_LIBCPP_BEGIN_NAMESPACE_STD + +# if _LIBCPP_STD_VER >= 23 && defined(_LIBCPP_WIN32API) +_LIBCPP_EXPORTED_FROM_ABI void* __filebuf_windows_native_handle(FILE* __file) noexcept; +# endif + +template <class _CharT, class _Traits> +class basic_filebuf : public basic_streambuf<_CharT, _Traits> { +public: + typedef _CharT char_type; + typedef _Traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; + typedef typename traits_type::state_type state_type; +# if _LIBCPP_STD_VER >= 26 +# if defined(_LIBCPP_WIN32API) + using native_handle_type = void*; // HANDLE +# elif __has_include(<unistd.h>) + using native_handle_type = int; // POSIX file descriptor +# else +# error "Provide a native file handle!" +# endif +# endif + + // 27.9.1.2 Constructors/destructor: + basic_filebuf(); + basic_filebuf(basic_filebuf&& __rhs); + ~basic_filebuf() override; + + // 27.9.1.3 Assign/swap: + _LIBCPP_HIDE_FROM_ABI basic_filebuf& operator=(basic_filebuf&& __rhs); + void swap(basic_filebuf& __rhs); + + // 27.9.1.4 Members: + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool is_open() const; + basic_filebuf* open(const char* __s, ios_base::openmode __mode); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode); +# endif + _LIBCPP_HIDE_FROM_ABI basic_filebuf* open(const string& __s, ios_base::openmode __mode); + +# if _LIBCPP_STD_VER >= 17 + _LIBCPP_HIDE_FROM_ABI basic_filebuf* open(const filesystem::path& __p, ios_base::openmode __mode) { + return open(__p.c_str(), __mode); + } +# endif + _LIBCPP_HIDE_FROM_ABI basic_filebuf* __open(int __fd, ios_base::openmode __mode); + basic_filebuf* close(); +# if _LIBCPP_STD_VER >= 26 + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { + _LIBCPP_ASSERT_UNCATEGORIZED(this->is_open(), "File must be opened"); +# if defined(_LIBCPP_WIN32API) + return std::__filebuf_windows_native_handle(__file_); +# elif __has_include(<unistd.h>) + return fileno(__file_); +# else +# error "Provide a way to determine the file native handle!" +# endif + } +# endif // _LIBCPP_STD_VER >= 26 + + _LIBCPP_HIDE_FROM_ABI inline static const char* __make_mdstring(ios_base::openmode __mode) _NOEXCEPT; +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + _LIBCPP_HIDE_FROM_ABI inline static const wchar_t* __make_mdwstring(ios_base::openmode __mode) _NOEXCEPT; +# endif + +protected: + // 27.9.1.5 Overridden virtual functions: + int_type underflow() override; + int_type pbackfail(int_type __c = traits_type::eof()) override; + int_type overflow(int_type __c = traits_type::eof()) override; + basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n) override; + pos_type + seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __wch = ios_base::in | ios_base::out) override; + pos_type seekpos(pos_type __sp, ios_base::openmode __wch = ios_base::in | ios_base::out) override; + int sync() override; + void imbue(const locale& __loc) override; + + _LIBCPP_HIDE_FROM_ABI_VIRTUAL streamsize xsputn(const char_type* __str, streamsize __len) override { + if (__always_noconv_ && __len >= (this->epptr() - this->pbase())) { + if (traits_type::eq_int_type(overflow(), traits_type::eof())) + return 0; + + return std::fwrite(__str, sizeof(char_type), __len, __file_); + } + return basic_streambuf<_CharT, _Traits>::xsputn(__str, __len); + } + +private: + char* __extbuf_; + const char* __extbufnext_; + const char* __extbufend_; + char __extbuf_min_[8]; + size_t __ebs_; + char_type* __intbuf_; + size_t __ibs_; + FILE* __file_; + const codecvt<char_type, char, state_type>* __cv_; + state_type __st_; + state_type __st_last_; + ios_base::openmode __om_; + // There have been no file operations yet, which allows setting unbuffered + // I/O mode. + static const ios_base::openmode __no_io_operations = ios_base::trunc; + // Unbuffered I/O mode has been requested. + static const ios_base::openmode __use_unbuffered_io = ios_base::ate; + // Used to track the currently used mode and track whether the output should + // be unbuffered. + // [filebuf.virtuals]/12 + // If setbuf(0, 0) is called on a stream before any I/O has occurred on + // that stream, the stream becomes unbuffered. Otherwise the results are + // implementation-defined. + // This allows calling setbuf(0, 0) + // - before opening a file, + // - after opening a file, before + // - a read + // - a write + // - a seek. + // Note that opening a file with ios_base::ate does a seek operation. + // Normally underflow, overflow, and sync change this flag to ios_base::in, + // ios_base_out, or 0. + // + // The ios_base::trunc and ios_base::ate flags are not used in __cm_. They + // are used to track the state of the unbuffered request. For readability + // they have the aliases __no_io_operations and __use_unbuffered_io + // respectively. + // + // The __no_io_operations and __use_unbuffered_io flags are used in the + // following way: + // - __no_io_operations is set upon construction to indicate the unbuffered + // state can be set. + // - When requesting unbuffered output: + // - If the file is open it sets the mode. + // - Else places a request by adding the __use_unbuffered_io flag. + // - When a file is opened it checks whether both __no_io_operations and + // __use_unbuffered_io are set. If so switches to unbuffered mode. + // - All file I/O operations change the mode effectively clearing the + // __no_io_operations and __use_unbuffered_io flags. + ios_base::openmode __cm_; + bool __owns_eb_; + bool __owns_ib_; + bool __always_noconv_; + + bool __read_mode(); + void __write_mode(); + + _LIBCPP_HIDE_FROM_ABI static int __fseek(FILE* __file, pos_type __offset, int __whence); + _LIBCPP_HIDE_FROM_ABI static pos_type __ftell(FILE* __file); + + _LIBCPP_EXPORTED_FROM_ABI friend FILE* __get_ostream_file(ostream&); + + // There are multiple (__)open function, they use different C-API open + // function. After that call these functions behave the same. This function + // does that part and determines the final return value. + _LIBCPP_HIDE_FROM_ABI basic_filebuf* __do_open(FILE* __file, ios_base::openmode __mode) { + __file_ = __file; + if (!__file_) + return nullptr; + + __om_ = __mode; + if (__cm_ == (__no_io_operations | __use_unbuffered_io)) { + std::setbuf(__file_, nullptr); + __cm_ = 0; + } + + if (__mode & ios_base::ate) { + __cm_ = 0; + if (fseek(__file_, 0, SEEK_END)) { + fclose(__file_); + __file_ = nullptr; + return nullptr; + } + } + + return this; + } + + // If the file is already open, switch to unbuffered mode. Otherwise, record + // the request to use unbuffered mode so that we use that mode when we + // eventually open the file. + _LIBCPP_HIDE_FROM_ABI void __request_unbuffered_mode() { + if (__file_) { + std::setbuf(__file_, nullptr); + __cm_ = 0; + } else { + __cm_ = __no_io_operations | __use_unbuffered_io; + } + } + + _LIBCPP_HIDE_FROM_ABI typename traits_type::int_type __overflow_failed() { + if (this->pptr() == this->epptr() + 1) { + this->pbump(-1); // lose the character we overflowed above -- we don't really have a + // choice since we couldn't commit the contents of the put area + } + return traits_type::eof(); + } +}; + +template <class _CharT, class _Traits> +basic_filebuf<_CharT, _Traits>::basic_filebuf() + : __extbuf_(nullptr), + __extbufnext_(nullptr), + __extbufend_(nullptr), + __ebs_(0), + __intbuf_(nullptr), + __ibs_(0), + __file_(nullptr), + __cv_(nullptr), + __st_(), + __st_last_(), + __om_(0), + __cm_(__no_io_operations), + __owns_eb_(false), + __owns_ib_(false), + __always_noconv_(false) { + if (std::has_facet<codecvt<char_type, char, state_type> >(this->getloc())) { + __cv_ = std::addressof(std::use_facet<codecvt<char_type, char, state_type> >(this->getloc())); + __always_noconv_ = __cv_->always_noconv(); + } + setbuf(nullptr, 4096); +} + +template <class _CharT, class _Traits> +basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs) : basic_streambuf<_CharT, _Traits>(__rhs) { + if (__rhs.__extbuf_ == __rhs.__extbuf_min_) { + __extbuf_ = __extbuf_min_; + __extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_); + __extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_); + } else { + __extbuf_ = __rhs.__extbuf_; + __extbufnext_ = __rhs.__extbufnext_; + __extbufend_ = __rhs.__extbufend_; + } + __ebs_ = __rhs.__ebs_; + __intbuf_ = __rhs.__intbuf_; + __ibs_ = __rhs.__ibs_; + __file_ = __rhs.__file_; + __cv_ = __rhs.__cv_; + __st_ = __rhs.__st_; + __st_last_ = __rhs.__st_last_; + __om_ = __rhs.__om_; + __cm_ = __rhs.__cm_; + __owns_eb_ = __rhs.__owns_eb_; + __owns_ib_ = __rhs.__owns_ib_; + __always_noconv_ = __rhs.__always_noconv_; + if (__rhs.pbase()) { + if (__rhs.pbase() == __rhs.__intbuf_) + this->setp(__intbuf_, __intbuf_ + (__rhs.epptr() - __rhs.pbase())); + else + this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__rhs.epptr() - __rhs.pbase())); + this->__pbump(__rhs.pptr() - __rhs.pbase()); + } else if (__rhs.eback()) { + if (__rhs.eback() == __rhs.__intbuf_) + this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()), __intbuf_ + (__rhs.egptr() - __rhs.eback())); + else + this->setg((char_type*)__extbuf_, + (char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()), + (char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback())); + } + __rhs.__extbuf_ = nullptr; + __rhs.__extbufnext_ = nullptr; + __rhs.__extbufend_ = nullptr; + __rhs.__ebs_ = 0; + __rhs.__intbuf_ = 0; + __rhs.__ibs_ = 0; + __rhs.__file_ = nullptr; + __rhs.__st_ = state_type(); + __rhs.__st_last_ = state_type(); + __rhs.__om_ = 0; + __rhs.__cm_ = 0; + __rhs.__owns_eb_ = false; + __rhs.__owns_ib_ = false; + __rhs.setg(0, 0, 0); + __rhs.setp(0, 0); +} + +template <class _CharT, class _Traits> +inline basic_filebuf<_CharT, _Traits>& basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs) { + close(); + swap(__rhs); + return *this; +} + +template <class _CharT, class _Traits> +basic_filebuf<_CharT, _Traits>::~basic_filebuf() { +# if _LIBCPP_HAS_EXCEPTIONS + try { +# endif // _LIBCPP_HAS_EXCEPTIONS + close(); +# if _LIBCPP_HAS_EXCEPTIONS + } catch (...) { + } +# endif // _LIBCPP_HAS_EXCEPTIONS + if (__owns_eb_) + delete[] __extbuf_; + if (__owns_ib_) + delete[] __intbuf_; +} + +template <class _CharT, class _Traits> +void basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs) { + basic_streambuf<char_type, traits_type>::swap(__rhs); + if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { + // Neither *this nor __rhs uses the small buffer, so we can simply swap the pointers. + std::swap(__extbuf_, __rhs.__extbuf_); + std::swap(__extbufnext_, __rhs.__extbufnext_); + std::swap(__extbufend_, __rhs.__extbufend_); + } else { + ptrdiff_t __ln = __extbufnext_ ? __extbufnext_ - __extbuf_ : 0; + ptrdiff_t __le = __extbufend_ ? __extbufend_ - __extbuf_ : 0; + ptrdiff_t __rn = __rhs.__extbufnext_ ? __rhs.__extbufnext_ - __rhs.__extbuf_ : 0; + ptrdiff_t __re = __rhs.__extbufend_ ? __rhs.__extbufend_ - __rhs.__extbuf_ : 0; + if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_) { + // *this uses the small buffer, but __rhs doesn't. + __extbuf_ = __rhs.__extbuf_; + __rhs.__extbuf_ = __rhs.__extbuf_min_; + std::memmove(__rhs.__extbuf_min_, __extbuf_min_, sizeof(__extbuf_min_)); + } else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_) { + // *this doesn't use the small buffer, but __rhs does. + __rhs.__extbuf_ = __extbuf_; + __extbuf_ = __extbuf_min_; + std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); + } else { + // Both *this and __rhs use the small buffer. + char __tmp[sizeof(__extbuf_min_)]; + std::memmove(__tmp, __extbuf_min_, sizeof(__extbuf_min_)); + std::memmove(__extbuf_min_, __rhs.__extbuf_min_, sizeof(__extbuf_min_)); + std::memmove(__rhs.__extbuf_min_, __tmp, sizeof(__extbuf_min_)); + } + __extbufnext_ = __extbuf_ + __rn; + __extbufend_ = __extbuf_ + __re; + __rhs.__extbufnext_ = __rhs.__extbuf_ + __ln; + __rhs.__extbufend_ = __rhs.__extbuf_ + __le; + } + std::swap(__ebs_, __rhs.__ebs_); + std::swap(__intbuf_, __rhs.__intbuf_); + std::swap(__ibs_, __rhs.__ibs_); + std::swap(__file_, __rhs.__file_); + std::swap(__cv_, __rhs.__cv_); + std::swap(__st_, __rhs.__st_); + std::swap(__st_last_, __rhs.__st_last_); + std::swap(__om_, __rhs.__om_); + std::swap(__cm_, __rhs.__cm_); + std::swap(__owns_eb_, __rhs.__owns_eb_); + std::swap(__owns_ib_, __rhs.__owns_ib_); + std::swap(__always_noconv_, __rhs.__always_noconv_); + if (this->eback() == (char_type*)__rhs.__extbuf_min_) { + ptrdiff_t __n = this->gptr() - this->eback(); + ptrdiff_t __e = this->egptr() - this->eback(); + this->setg((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __n, (char_type*)__extbuf_min_ + __e); + } else if (this->pbase() == (char_type*)__rhs.__extbuf_min_) { + ptrdiff_t __n = this->pptr() - this->pbase(); + ptrdiff_t __e = this->epptr() - this->pbase(); + this->setp((char_type*)__extbuf_min_, (char_type*)__extbuf_min_ + __e); + this->__pbump(__n); + } + if (__rhs.eback() == (char_type*)__extbuf_min_) { + ptrdiff_t __n = __rhs.gptr() - __rhs.eback(); + ptrdiff_t __e = __rhs.egptr() - __rhs.eback(); + __rhs.setg( + (char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __n, (char_type*)__rhs.__extbuf_min_ + __e); + } else if (__rhs.pbase() == (char_type*)__extbuf_min_) { + ptrdiff_t __n = __rhs.pptr() - __rhs.pbase(); + ptrdiff_t __e = __rhs.epptr() - __rhs.pbase(); + __rhs.setp((char_type*)__rhs.__extbuf_min_, (char_type*)__rhs.__extbuf_min_ + __e); + __rhs.__pbump(__n); + } +} + +template <class _CharT, class _Traits> +inline _LIBCPP_HIDE_FROM_ABI void swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y) { + __x.swap(__y); +} + +template <class _CharT, class _Traits> +inline bool basic_filebuf<_CharT, _Traits>::is_open() const { + return __file_ != nullptr; +} + +template <class _CharT, class _Traits> +const char* basic_filebuf<_CharT, _Traits>::__make_mdstring(ios_base::openmode __mode) _NOEXCEPT { + switch (__mode & ~ios_base::ate) { + case ios_base::out: + case ios_base::out | ios_base::trunc: + return "w" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::out | ios_base::app: + case ios_base::app: + return "a" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in: + return "r" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out: + return "r+" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::trunc: + return "w+" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::app: + case ios_base::in | ios_base::app: + return "a+" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::out | ios_base::binary: + case ios_base::out | ios_base::trunc | ios_base::binary: + return "wb" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::out | ios_base::app | ios_base::binary: + case ios_base::app | ios_base::binary: + return "ab" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::binary: + return "rb" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::binary: + return "r+b" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: + return "w+b" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: + case ios_base::in | ios_base::app | ios_base::binary: + return "a+b" _LIBCPP_FOPEN_CLOEXEC_MODE; +# if _LIBCPP_STD_VER >= 23 + case ios_base::out | ios_base::noreplace: + case ios_base::out | ios_base::trunc | ios_base::noreplace: + return "wx" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::noreplace: + return "w+x" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::out | ios_base::binary | ios_base::noreplace: + case ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: + return "wbx" _LIBCPP_FOPEN_CLOEXEC_MODE; + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: + return "w+bx" _LIBCPP_FOPEN_CLOEXEC_MODE; +# endif // _LIBCPP_STD_VER >= 23 + default: + return nullptr; + } + __libcpp_unreachable(); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +const wchar_t* basic_filebuf<_CharT, _Traits>::__make_mdwstring(ios_base::openmode __mode) _NOEXCEPT { + switch (__mode & ~ios_base::ate) { + case ios_base::out: + case ios_base::out | ios_base::trunc: + return L"w"; + case ios_base::out | ios_base::app: + case ios_base::app: + return L"a"; + case ios_base::in: + return L"r"; + case ios_base::in | ios_base::out: + return L"r+"; + case ios_base::in | ios_base::out | ios_base::trunc: + return L"w+"; + case ios_base::in | ios_base::out | ios_base::app: + case ios_base::in | ios_base::app: + return L"a+"; + case ios_base::out | ios_base::binary: + case ios_base::out | ios_base::trunc | ios_base::binary: + return L"wb"; + case ios_base::out | ios_base::app | ios_base::binary: + case ios_base::app | ios_base::binary: + return L"ab"; + case ios_base::in | ios_base::binary: + return L"rb"; + case ios_base::in | ios_base::out | ios_base::binary: + return L"r+b"; + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary: + return L"w+b"; + case ios_base::in | ios_base::out | ios_base::app | ios_base::binary: + case ios_base::in | ios_base::app | ios_base::binary: + return L"a+b"; +# if _LIBCPP_STD_VER >= 23 + case ios_base::out | ios_base::noreplace: + case ios_base::out | ios_base::trunc | ios_base::noreplace: + return L"wx"; + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::noreplace: + return L"w+x"; + case ios_base::out | ios_base::binary | ios_base::noreplace: + case ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: + return L"wbx"; + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary | ios_base::noreplace: + return L"w+bx"; +# endif // _LIBCPP_STD_VER >= 23 + default: + return nullptr; + } + __libcpp_unreachable(); +} +# endif + +template <class _CharT, class _Traits> +basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { + if (__file_) + return nullptr; + const char* __mdstr = __make_mdstring(__mode); + if (!__mdstr) + return nullptr; + + return __do_open(std::fopen(__s, __mdstr), __mode); +} + +template <class _CharT, class _Traits> +inline basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { + if (__file_) + return nullptr; + const char* __mdstr = __make_mdstring(__mode); + if (!__mdstr) + return nullptr; + + return __do_open(fdopen(__fd, __mdstr), __mode); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +// This is basically the same as the char* overload except that it uses _wfopen +// and long mode strings. +template <class _CharT, class _Traits> +basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { + if (__file_) + return nullptr; + const wchar_t* __mdstr = __make_mdwstring(__mode); + if (!__mdstr) + return nullptr; + + return __do_open(_wfopen(__s, __mdstr), __mode); +} +# endif + +template <class _CharT, class _Traits> +inline basic_filebuf<_CharT, _Traits>* +basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { + return open(__s.c_str(), __mode); +} + +template <class _CharT, class _Traits> +basic_filebuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::close() { + basic_filebuf<_CharT, _Traits>* __rt = nullptr; + if (__file_) { + __rt = this; + unique_ptr<FILE, int (*)(FILE*)> __h(__file_, fclose); + if (sync()) + __rt = nullptr; + if (fclose(__h.release())) + __rt = nullptr; + __file_ = nullptr; + // Reset the get and the put areas without getting rid of the underlying buffers, + // which might have been configured by the user. Make sure to keep the buffers + // since the user may re-open the stream. + this->setg(nullptr, nullptr, nullptr); + this->setp(nullptr, nullptr); + __cm_ = __no_io_operations; + } + return __rt; +} + +template <class _CharT, class _Traits> +typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::underflow() { + if (__file_ == nullptr) + return traits_type::eof(); + bool __initial = __read_mode(); + char_type __1buf; + if (this->gptr() == nullptr) + this->setg(std::addressof(__1buf), std::addressof(__1buf) + 1, std::addressof(__1buf) + 1); + const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4); + int_type __c = traits_type::eof(); + if (this->gptr() == this->egptr()) { + std::memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type)); + if (__always_noconv_) { + size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz); + __nmemb = std::fread(this->eback() + __unget_sz, 1, __nmemb, __file_); + if (__nmemb != 0) { + this->setg(this->eback(), this->eback() + __unget_sz, this->eback() + __unget_sz + __nmemb); + __c = traits_type::to_int_type(*this->gptr()); + } + } else { + if (__extbufend_ != __extbufnext_) { + _LIBCPP_ASSERT_NON_NULL(__extbufnext_ != nullptr, "underflow moving from nullptr"); + _LIBCPP_ASSERT_NON_NULL(__extbuf_ != nullptr, "underflow moving into nullptr"); + std::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_); + } + __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_); + __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_); + size_t __nmemb = + std::min(static_cast<size_t>(__ibs_ - __unget_sz), static_cast<size_t>(__extbufend_ - __extbufnext_)); + codecvt_base::result __r; + __st_last_ = __st_; + size_t __nr = std::fread((void*)const_cast<char*>(__extbufnext_), 1, __nmemb, __file_); + if (__nr != 0) { + if (!__cv_) + std::__throw_bad_cast(); + + __extbufend_ = __extbufnext_ + __nr; + char_type* __inext; + __r = __cv_->in( + __st_, __extbuf_, __extbufend_, __extbufnext_, this->eback() + __unget_sz, this->eback() + __ibs_, __inext); + if (__r == codecvt_base::noconv) { + this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)const_cast<char*>(__extbufend_)); + __c = traits_type::to_int_type(*this->gptr()); + } else if (__inext != this->eback() + __unget_sz) { + this->setg(this->eback(), this->eback() + __unget_sz, __inext); + __c = traits_type::to_int_type(*this->gptr()); + } + } + } + } else + __c = traits_type::to_int_type(*this->gptr()); + if (this->eback() == std::addressof(__1buf)) + this->setg(nullptr, nullptr, nullptr); + return __c; +} + +template <class _CharT, class _Traits> +typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c) { + if (__file_ && this->eback() < this->gptr()) { + if (traits_type::eq_int_type(__c, traits_type::eof())) { + this->gbump(-1); + return traits_type::not_eof(__c); + } + if ((__om_ & ios_base::out) || traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1])) { + this->gbump(-1); + *this->gptr() = traits_type::to_char_type(__c); + return __c; + } + } + return traits_type::eof(); +} + +template <class _CharT, class _Traits> +typename basic_filebuf<_CharT, _Traits>::int_type basic_filebuf<_CharT, _Traits>::overflow(int_type __c) { + if (__file_ == nullptr) + return traits_type::eof(); + __write_mode(); + char_type __1buf; + char_type* __pb_save = this->pbase(); + char_type* __epb_save = this->epptr(); + if (!traits_type::eq_int_type(__c, traits_type::eof())) { + if (this->pptr() == nullptr) + this->setp(std::addressof(__1buf), std::addressof(__1buf) + 1); + *this->pptr() = traits_type::to_char_type(__c); + this->pbump(1); + } + + // There is nothing to write, early return + if (this->pptr() == this->pbase()) { + return traits_type::not_eof(__c); + } + + if (__always_noconv_) { + size_t __n = static_cast<size_t>(this->pptr() - this->pbase()); + if (std::fwrite(this->pbase(), sizeof(char_type), __n, __file_) != __n) { + return __overflow_failed(); + } + } else { + if (!__cv_) + std::__throw_bad_cast(); + + // See [filebuf.virtuals] + char_type* __b = this->pbase(); + char_type* __p = this->pptr(); + const char_type* __end; + char* __extbuf_end = __extbuf_; + do { + codecvt_base::result __r = __cv_->out(__st_, __b, __p, __end, __extbuf_, __extbuf_ + __ebs_, __extbuf_end); + if (__end == __b) { + return __overflow_failed(); + } + + // No conversion needed: output characters directly to the file, done. + if (__r == codecvt_base::noconv) { + size_t __n = static_cast<size_t>(__p - __b); + if (std::fwrite(__b, 1, __n, __file_) != __n) { + return __overflow_failed(); + } + break; + + // Conversion successful: output the converted characters to the file, done. + } else if (__r == codecvt_base::ok) { + size_t __n = static_cast<size_t>(__extbuf_end - __extbuf_); + if (std::fwrite(__extbuf_, 1, __n, __file_) != __n) { + return __overflow_failed(); + } + break; + + // Conversion partially successful: output converted characters to the file and repeat with the + // remaining characters. + } else if (__r == codecvt_base::partial) { + size_t __n = static_cast<size_t>(__extbuf_end - __extbuf_); + if (std::fwrite(__extbuf_, 1, __n, __file_) != __n) { + return __overflow_failed(); + } + __b = const_cast<char_type*>(__end); + continue; + + } else { + return __overflow_failed(); + } + } while (true); + } + this->setp(__pb_save, __epb_save); + return traits_type::not_eof(__c); +} + +template <class _CharT, class _Traits> +basic_streambuf<_CharT, _Traits>* basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n) { + this->setg(nullptr, nullptr, nullptr); + this->setp(nullptr, nullptr); + // Calling setbuf(nullptr, 0) before any i/o operation switches the stream to unbuffered mode + if (__cm_ == __no_io_operations && __s == nullptr && __n == 0) + __request_unbuffered_mode(); + if (__owns_eb_) + delete[] __extbuf_; + if (__owns_ib_) + delete[] __intbuf_; + __ebs_ = __n; + if (__ebs_ > sizeof(__extbuf_min_)) { + if (__always_noconv_ && __s) { + __extbuf_ = (char*)__s; + __owns_eb_ = false; + } else { + __extbuf_ = new char[__ebs_]; + __owns_eb_ = true; + } + } else { + __extbuf_ = __extbuf_min_; + __ebs_ = sizeof(__extbuf_min_); + __owns_eb_ = false; + } + if (!__always_noconv_) { + __ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_)); + if (__s && __ibs_ > sizeof(__extbuf_min_)) { + __intbuf_ = __s; + __owns_ib_ = false; + } else { + __intbuf_ = new char_type[__ibs_]; + __owns_ib_ = true; + } + } else { + __ibs_ = 0; + __intbuf_ = nullptr; + __owns_ib_ = false; + } + return this; +} + +template <class _CharT, class _Traits> +typename basic_filebuf<_CharT, _Traits>::pos_type +basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode) { + if (!__cv_) + std::__throw_bad_cast(); + + int __width = __cv_->encoding(); + if (__file_ == nullptr || (__width <= 0 && __off != 0) || sync()) + return pos_type(off_type(-1)); + // __width > 0 || __off == 0 + int __whence; + switch (__way) { + case ios_base::beg: + __whence = SEEK_SET; + break; + case ios_base::cur: + __whence = SEEK_CUR; + break; + case ios_base::end: + __whence = SEEK_END; + break; + default: + return pos_type(off_type(-1)); + } + if (__fseek(__file_, __width > 0 ? __width * __off : 0, __whence)) + return pos_type(off_type(-1)); + pos_type __r = __ftell(__file_); + __r.state(__st_); + return __r; +} + +template <class _CharT, class _Traits> +int basic_filebuf<_CharT, _Traits>::__fseek(FILE* __file, pos_type __offset, int __whence) { +# if defined(_LIBCPP_MSVCRT_LIKE) + return _fseeki64(__file, __offset, __whence); +# elif _LIBCPP_LIBC_NEWLIB + return fseek(__file, __offset, __whence); +# else + return ::fseeko(__file, __offset, __whence); +# endif +} + +template <class _CharT, class _Traits> +typename basic_filebuf<_CharT, _Traits>::pos_type basic_filebuf<_CharT, _Traits>::__ftell(FILE* __file) { +# if defined(_LIBCPP_MSVCRT_LIKE) + return _ftelli64(__file); +# elif _LIBCPP_LIBC_NEWLIB + return ftell(__file); +# else + return ftello(__file); +# endif +} + +template <class _CharT, class _Traits> +typename basic_filebuf<_CharT, _Traits>::pos_type +basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode) { + if (__file_ == nullptr || sync()) + return pos_type(off_type(-1)); + if (__fseek(__file_, __sp, SEEK_SET)) + return pos_type(off_type(-1)); + __st_ = __sp.state(); + return __sp; +} + +template <class _CharT, class _Traits> +int basic_filebuf<_CharT, _Traits>::sync() { + if (__file_ == nullptr) + return 0; + if (!__cv_) + std::__throw_bad_cast(); + + if (__cm_ & ios_base::out) { + if (this->pptr() != this->pbase()) + if (overflow() == traits_type::eof()) + return -1; + codecvt_base::result __r; + do { + char* __extbe; + __r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe); + size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_); + if (std::fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb) + return -1; + } while (__r == codecvt_base::partial); + if (__r == codecvt_base::error) + return -1; + if (std::fflush(__file_)) + return -1; + } else if (__cm_ & ios_base::in) { + off_type __c; + state_type __state = __st_last_; + bool __update_st = false; + if (__always_noconv_) + __c = this->egptr() - this->gptr(); + else { + int __width = __cv_->encoding(); + __c = __extbufend_ - __extbufnext_; + if (__width > 0) + __c += __width * (this->egptr() - this->gptr()); + else { + if (this->gptr() != this->egptr()) { + const int __off = __cv_->length(__state, __extbuf_, __extbufnext_, this->gptr() - this->eback()); + __c += __extbufnext_ - __extbuf_ - __off; + __update_st = true; + } + } + } + if (__fseek(__file_, -__c, SEEK_CUR)) + return -1; + if (__update_st) + __st_ = __state; + __extbufnext_ = __extbufend_ = __extbuf_; + this->setg(nullptr, nullptr, nullptr); + __cm_ = 0; + } + return 0; +} + +template <class _CharT, class _Traits> +void basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc) { + sync(); + __cv_ = std::addressof(std::use_facet<codecvt<char_type, char, state_type> >(__loc)); + bool __old_anc = __always_noconv_; + __always_noconv_ = __cv_->always_noconv(); + if (__old_anc != __always_noconv_) { + this->setg(nullptr, nullptr, nullptr); + this->setp(nullptr, nullptr); + // invariant, char_type is char, else we couldn't get here + if (__always_noconv_) // need to dump __intbuf_ + { + if (__owns_eb_) + delete[] __extbuf_; + __owns_eb_ = __owns_ib_; + __ebs_ = __ibs_; + __extbuf_ = (char*)__intbuf_; + __ibs_ = 0; + __intbuf_ = nullptr; + __owns_ib_ = false; + } else // need to obtain an __intbuf_. + { // If __extbuf_ is user-supplied, use it, else new __intbuf_ + if (!__owns_eb_ && __extbuf_ != __extbuf_min_) { + __ibs_ = __ebs_; + __intbuf_ = (char_type*)__extbuf_; + __owns_ib_ = false; + __extbuf_ = new char[__ebs_]; + __owns_eb_ = true; + } else { + __ibs_ = __ebs_; + __intbuf_ = new char_type[__ibs_]; + __owns_ib_ = true; + } + } + } +} + +template <class _CharT, class _Traits> +bool basic_filebuf<_CharT, _Traits>::__read_mode() { + if (!(__cm_ & ios_base::in)) { + this->setp(nullptr, nullptr); + if (__always_noconv_) + this->setg((char_type*)__extbuf_, (char_type*)__extbuf_ + __ebs_, (char_type*)__extbuf_ + __ebs_); + else + this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_); + __cm_ = ios_base::in; + return true; + } + return false; +} + +template <class _CharT, class _Traits> +void basic_filebuf<_CharT, _Traits>::__write_mode() { + if (!(__cm_ & ios_base::out)) { + this->setg(nullptr, nullptr, nullptr); + if (__ebs_ > sizeof(__extbuf_min_)) { + if (__always_noconv_) + this->setp((char_type*)__extbuf_, (char_type*)__extbuf_ + (__ebs_ - 1)); + else + this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1)); + } else + this->setp(nullptr, nullptr); + __cm_ = ios_base::out; + } +} + +// basic_ifstream + +template <class _CharT, class _Traits> +class basic_ifstream : public basic_istream<_CharT, _Traits> { +public: + typedef _CharT char_type; + typedef _Traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; +# if _LIBCPP_STD_VER >= 26 + using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; +# endif + + _LIBCPP_HIDE_FROM_ABI basic_ifstream(); + _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); +# endif + _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in); +# if _LIBCPP_STD_VER >= 17 + template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> + _LIBCPP_HIDE_FROM_ABI explicit basic_ifstream(const _Tp& __p, ios_base::openmode __mode = ios_base::in) + : basic_ifstream(__p.c_str(), __mode) {} +# endif // _LIBCPP_STD_VER >= 17 + _LIBCPP_HIDE_FROM_ABI basic_ifstream(basic_ifstream&& __rhs); + _LIBCPP_HIDE_FROM_ABI basic_ifstream& operator=(basic_ifstream&& __rhs); + _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream& __rhs); + + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; +# if _LIBCPP_STD_VER >= 26 + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { + return rdbuf()->native_handle(); + } +# endif + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool is_open() const; + void open(const char* __s, ios_base::openmode __mode = ios_base::in); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in); +# endif + void open(const string& __s, ios_base::openmode __mode = ios_base::in); +# if _LIBCPP_STD_VER >= 17 + _LIBCPP_HIDE_FROM_ABI void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in) { + return open(__p.c_str(), __mode); + } +# endif // _LIBCPP_STD_VER >= 17 + + _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); + _LIBCPP_HIDE_FROM_ABI void close(); + +private: + basic_filebuf<char_type, traits_type> __sb_; +}; + +template <class _CharT, class _Traits> +inline basic_ifstream<_CharT, _Traits>::basic_ifstream() + : basic_istream<char_type, traits_type>(std::addressof(__sb_)) {} + +template <class _CharT, class _Traits> +inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode) + : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode | ios_base::in) == nullptr) + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode) + : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode | ios_base::in) == nullptr) + this->setstate(ios_base::failbit); +} +# endif + +// extension +template <class _CharT, class _Traits> +inline basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode) + : basic_istream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode | ios_base::in) == nullptr) + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs) + : basic_istream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { + this->set_rdbuf(std::addressof(__sb_)); +} + +template <class _CharT, class _Traits> +inline basic_ifstream<_CharT, _Traits>& basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs) { + basic_istream<char_type, traits_type>::operator=(std::move(__rhs)); + __sb_ = std::move(__rhs.__sb_); + return *this; +} + +template <class _CharT, class _Traits> +inline void basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs) { + basic_istream<char_type, traits_type>::swap(__rhs); + __sb_.swap(__rhs.__sb_); +} + +template <class _CharT, class _Traits> +inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y) { + __x.swap(__y); +} + +template <class _CharT, class _Traits> +inline basic_filebuf<_CharT, _Traits>* basic_ifstream<_CharT, _Traits>::rdbuf() const { + return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); +} + +template <class _CharT, class _Traits> +inline bool basic_ifstream<_CharT, _Traits>::is_open() const { + return __sb_.is_open(); +} + +template <class _CharT, class _Traits> +void basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode | ios_base::in)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +void basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode | ios_base::in)) + this->clear(); + else + this->setstate(ios_base::failbit); +} +# endif + +template <class _CharT, class _Traits> +void basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode | ios_base::in)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline void basic_ifstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { + if (__sb_.__open(__fd, __mode | ios_base::in)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline void basic_ifstream<_CharT, _Traits>::close() { + if (__sb_.close() == 0) + this->setstate(ios_base::failbit); +} + +// basic_ofstream + +template <class _CharT, class _Traits> +class basic_ofstream : public basic_ostream<_CharT, _Traits> { +public: + typedef _CharT char_type; + typedef _Traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; +# if _LIBCPP_STD_VER >= 26 + using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; +# endif + + _LIBCPP_HIDE_FROM_ABI basic_ofstream(); + _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); +# endif + _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out); + +# if _LIBCPP_STD_VER >= 17 + template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> + _LIBCPP_HIDE_FROM_ABI explicit basic_ofstream(const _Tp& __p, ios_base::openmode __mode = ios_base::out) + : basic_ofstream(__p.c_str(), __mode) {} +# endif // _LIBCPP_STD_VER >= 17 + + _LIBCPP_HIDE_FROM_ABI basic_ofstream(basic_ofstream&& __rhs); + _LIBCPP_HIDE_FROM_ABI basic_ofstream& operator=(basic_ofstream&& __rhs); + _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream& __rhs); + + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; +# if _LIBCPP_STD_VER >= 26 + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { + return rdbuf()->native_handle(); + } +# endif + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool is_open() const; + void open(const char* __s, ios_base::openmode __mode = ios_base::out); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out); +# endif + void open(const string& __s, ios_base::openmode __mode = ios_base::out); + +# if _LIBCPP_STD_VER >= 17 + _LIBCPP_HIDE_FROM_ABI void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out) { + return open(__p.c_str(), __mode); + } +# endif // _LIBCPP_STD_VER >= 17 + + _LIBCPP_HIDE_FROM_ABI void __open(int __fd, ios_base::openmode __mode); + _LIBCPP_HIDE_FROM_ABI void close(); + +private: + basic_filebuf<char_type, traits_type> __sb_; +}; + +template <class _CharT, class _Traits> +inline basic_ofstream<_CharT, _Traits>::basic_ofstream() + : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) {} + +template <class _CharT, class _Traits> +inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode) + : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode | ios_base::out) == nullptr) + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode) + : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode | ios_base::out) == nullptr) + this->setstate(ios_base::failbit); +} +# endif + +// extension +template <class _CharT, class _Traits> +inline basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode) + : basic_ostream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode | ios_base::out) == nullptr) + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs) + : basic_ostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { + this->set_rdbuf(std::addressof(__sb_)); +} + +template <class _CharT, class _Traits> +inline basic_ofstream<_CharT, _Traits>& basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs) { + basic_ostream<char_type, traits_type>::operator=(std::move(__rhs)); + __sb_ = std::move(__rhs.__sb_); + return *this; +} + +template <class _CharT, class _Traits> +inline void basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs) { + basic_ostream<char_type, traits_type>::swap(__rhs); + __sb_.swap(__rhs.__sb_); +} + +template <class _CharT, class _Traits> +inline _LIBCPP_HIDE_FROM_ABI void swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y) { + __x.swap(__y); +} + +template <class _CharT, class _Traits> +inline basic_filebuf<_CharT, _Traits>* basic_ofstream<_CharT, _Traits>::rdbuf() const { + return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); +} + +template <class _CharT, class _Traits> +inline bool basic_ofstream<_CharT, _Traits>::is_open() const { + return __sb_.is_open(); +} + +template <class _CharT, class _Traits> +void basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode | ios_base::out)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +void basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode | ios_base::out)) + this->clear(); + else + this->setstate(ios_base::failbit); +} +# endif + +template <class _CharT, class _Traits> +void basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode | ios_base::out)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline void basic_ofstream<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) { + if (__sb_.__open(__fd, __mode | ios_base::out)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline void basic_ofstream<_CharT, _Traits>::close() { + if (__sb_.close() == nullptr) + this->setstate(ios_base::failbit); +} + +// basic_fstream + +template <class _CharT, class _Traits> +class basic_fstream : public basic_iostream<_CharT, _Traits> { +public: + typedef _CharT char_type; + typedef _Traits traits_type; + typedef typename traits_type::int_type int_type; + typedef typename traits_type::pos_type pos_type; + typedef typename traits_type::off_type off_type; +# if _LIBCPP_STD_VER >= 26 + using native_handle_type = typename basic_filebuf<_CharT, _Traits>::native_handle_type; +# endif + + _LIBCPP_HIDE_FROM_ABI basic_fstream(); + _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const char* __s, + ios_base::openmode __mode = ios_base::in | ios_base::out); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const wchar_t* __s, + ios_base::openmode __mode = ios_base::in | ios_base::out); +# endif + _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const string& __s, + ios_base::openmode __mode = ios_base::in | ios_base::out); + +# if _LIBCPP_STD_VER >= 17 + template <class _Tp, class = enable_if_t<is_same_v<_Tp, filesystem::path>>> + _LIBCPP_HIDE_FROM_ABI explicit basic_fstream(const _Tp& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) + : basic_fstream(__p.c_str(), __mode) {} +# endif // _LIBCPP_STD_VER >= 17 + + _LIBCPP_HIDE_FROM_ABI basic_fstream(basic_fstream&& __rhs); + + _LIBCPP_HIDE_FROM_ABI basic_fstream& operator=(basic_fstream&& __rhs); + + _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream& __rhs); + + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI basic_filebuf<char_type, traits_type>* rdbuf() const; +# if _LIBCPP_STD_VER >= 26 + [[nodiscard]] _LIBCPP_HIDE_FROM_ABI native_handle_type native_handle() const noexcept { + return rdbuf()->native_handle(); + } +# endif + [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool is_open() const; + _LIBCPP_HIDE_FROM_ABI void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); +# if _LIBCPP_HAS_OPEN_WITH_WCHAR + void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out); +# endif + _LIBCPP_HIDE_FROM_ABI void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out); + +# if _LIBCPP_STD_VER >= 17 + _LIBCPP_HIDE_FROM_ABI void + open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out) { + return open(__p.c_str(), __mode); + } +# endif // _LIBCPP_STD_VER >= 17 + + _LIBCPP_HIDE_FROM_ABI void close(); + +private: + basic_filebuf<char_type, traits_type> __sb_; +}; + +template <class _CharT, class _Traits> +inline basic_fstream<_CharT, _Traits>::basic_fstream() + : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) {} + +template <class _CharT, class _Traits> +inline basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode) + : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode) == nullptr) + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +inline basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode) + : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode) == nullptr) + this->setstate(ios_base::failbit); +} +# endif + +template <class _CharT, class _Traits> +inline basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode) + : basic_iostream<char_type, traits_type>(std::addressof(__sb_)) { + if (__sb_.open(__s, __mode) == nullptr) + this->setstate(ios_base::failbit); +} + +// extension +template <class _CharT, class _Traits> +inline basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs) + : basic_iostream<char_type, traits_type>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) { + this->set_rdbuf(std::addressof(__sb_)); +} + +template <class _CharT, class _Traits> +inline basic_fstream<_CharT, _Traits>& basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs) { + basic_iostream<char_type, traits_type>::operator=(std::move(__rhs)); + __sb_ = std::move(__rhs.__sb_); + return *this; +} + +template <class _CharT, class _Traits> +inline void basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs) { + basic_iostream<char_type, traits_type>::swap(__rhs); + __sb_.swap(__rhs.__sb_); +} + +template <class _CharT, class _Traits> +inline _LIBCPP_HIDE_FROM_ABI void swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y) { + __x.swap(__y); +} + +template <class _CharT, class _Traits> +inline basic_filebuf<_CharT, _Traits>* basic_fstream<_CharT, _Traits>::rdbuf() const { + return const_cast<basic_filebuf<char_type, traits_type>*>(std::addressof(__sb_)); +} + +template <class _CharT, class _Traits> +inline bool basic_fstream<_CharT, _Traits>::is_open() const { + return __sb_.is_open(); +} + +template <class _CharT, class _Traits> +void basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_HAS_OPEN_WITH_WCHAR +template <class _CharT, class _Traits> +void basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode)) + this->clear(); + else + this->setstate(ios_base::failbit); +} +# endif + +template <class _CharT, class _Traits> +void basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode) { + if (__sb_.open(__s, __mode)) + this->clear(); + else + this->setstate(ios_base::failbit); +} + +template <class _CharT, class _Traits> +inline void basic_fstream<_CharT, _Traits>::close() { + if (__sb_.close() == nullptr) + this->setstate(ios_base::failbit); +} + +# if _LIBCPP_AVAILABILITY_HAS_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 +extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ifstream<char>; +extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ofstream<char>; +extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_filebuf<char>; +# endif + +_LIBCPP_END_NAMESPACE_STD + +_LIBCPP_POP_MACROS + +# endif // _LIBCPP_HAS_FILESYSTEM && _LIBCPP_HAS_LOCALIZATION + +# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 +# include <atomic> +# include <concepts> +# include <cstdlib> +# include <iosfwd> +# include <limits> +# include <mutex> +# include <new> +# include <stdexcept> +# include <type_traits> +# endif + +# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23 +# include <filesystem> +# endif +#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) + +#endif // _LIBCPP_FSTREAM |