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// -*- C++ -*- |
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//===------------------------- streambuf ----------------------------------===// |
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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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|
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#ifndef _LIBCPP_STEAMBUF |
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#define _LIBCPP_STEAMBUF |
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|
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/* |
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streambuf synopsis |
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|
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namespace std |
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{
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|
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template <class charT, class traits = char_traits<charT> > |
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class basic_streambuf |
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{
|
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public: |
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// types: |
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typedef charT char_type; |
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typedef traits traits_type; |
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typedef typename traits_type::int_type int_type; |
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typedef typename traits_type::pos_type pos_type; |
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typedef typename traits_type::off_type off_type; |
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|
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virtual ~basic_streambuf(); |
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|
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// 27.6.2.2.1 locales: |
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locale pubimbue(const locale& loc); |
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locale getloc() const; |
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|
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// 27.6.2.2.2 buffer and positioning: |
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basic_streambuf* pubsetbuf(char_type* s, streamsize n); |
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pos_type pubseekoff(off_type off, ios_base::seekdir way, |
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ios_base::openmode which = ios_base::in | ios_base::out); |
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pos_type pubseekpos(pos_type sp, |
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ios_base::openmode which = ios_base::in | ios_base::out); |
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int pubsync(); |
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|
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// Get and put areas: |
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// 27.6.2.2.3 Get area: |
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streamsize in_avail(); |
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int_type snextc(); |
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int_type sbumpc(); |
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int_type sgetc(); |
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streamsize sgetn(char_type* s, streamsize n); |
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|
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// 27.6.2.2.4 Putback: |
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int_type sputbackc(char_type c); |
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int_type sungetc(); |
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|
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// 27.6.2.2.5 Put area: |
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int_type sputc(char_type c); |
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streamsize sputn(const char_type* s, streamsize n); |
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|
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protected: |
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basic_streambuf(); |
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basic_streambuf(const basic_streambuf& rhs); |
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basic_streambuf& operator=(const basic_streambuf& rhs); |
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void swap(basic_streambuf& rhs); |
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|
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// 27.6.2.3.2 Get area: |
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char_type* eback() const; |
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char_type* gptr() const; |
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char_type* egptr() const; |
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void gbump(int n); |
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void setg(char_type* gbeg, char_type* gnext, char_type* gend); |
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|
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// 27.6.2.3.3 Put area: |
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char_type* pbase() const; |
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char_type* pptr() const; |
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char_type* epptr() const; |
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void pbump(int n); |
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void setp(char_type* pbeg, char_type* pend); |
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|
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// 27.6.2.4 virtual functions: |
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// 27.6.2.4.1 Locales: |
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virtual void imbue(const locale& loc); |
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|
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// 27.6.2.4.2 Buffer management and positioning: |
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virtual basic_streambuf* setbuf(char_type* s, streamsize n); |
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virtual pos_type seekoff(off_type off, ios_base::seekdir way, |
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ios_base::openmode which = ios_base::in | ios_base::out); |
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virtual pos_type seekpos(pos_type sp, |
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ios_base::openmode which = ios_base::in | ios_base::out); |
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virtual int sync(); |
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|
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// 27.6.2.4.3 Get area: |
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virtual streamsize showmanyc(); |
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virtual streamsize xsgetn(char_type* s, streamsize n); |
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virtual int_type underflow(); |
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virtual int_type uflow(); |
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|
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// 27.6.2.4.4 Putback: |
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virtual int_type pbackfail(int_type c = traits_type::eof()); |
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|
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// 27.6.2.4.5 Put area: |
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virtual streamsize xsputn(const char_type* s, streamsize n); |
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virtual int_type overflow (int_type c = traits_type::eof()); |
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}; |
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|
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} // std |
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|
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*/ |
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|
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#include <__config> |
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#include <iosfwd> |
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#include <ios> |
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|
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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#pragma GCC system_header |
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#endif |
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|
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_LIBCPP_BEGIN_NAMESPACE_STD |
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|
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template <class _CharT, class _Traits> |
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class _LIBCPP_TYPE_VIS_ONLY basic_streambuf |
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{
|
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public: |
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// types: |
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typedef _CharT char_type; |
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typedef _Traits traits_type; |
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typedef typename traits_type::int_type int_type; |
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typedef typename traits_type::pos_type pos_type; |
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typedef typename traits_type::off_type off_type; |
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|
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virtual ~basic_streambuf(); |
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|
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// 27.6.2.2.1 locales: |
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locale pubimbue(const locale& __loc); |
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locale getloc() const; |
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|
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// 27.6.2.2.2 buffer and positioning: |
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basic_streambuf* pubsetbuf(char_type* __s, streamsize __n); |
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pos_type pubseekoff(off_type __off, ios_base::seekdir __way, |
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ios_base::openmode __which = ios_base::in | ios_base::out); |
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pos_type pubseekpos(pos_type __sp, |
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ios_base::openmode __which = ios_base::in | ios_base::out); |
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int pubsync(); |
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|
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// Get and put areas: |
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// 27.6.2.2.3 Get area: |
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streamsize in_avail(); |
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int_type snextc(); |
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int_type sbumpc(); |
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int_type sgetc(); |
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streamsize sgetn(char_type* __s, streamsize __n); |
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|
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// 27.6.2.2.4 Putback: |
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int_type sputbackc(char_type __c); |
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int_type sungetc(); |
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|
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// 27.6.2.2.5 Put area: |
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int_type sputc(char_type __c); |
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streamsize sputn(const char_type* __s, streamsize __n); |
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|
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protected: |
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basic_streambuf(); |
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basic_streambuf(const basic_streambuf& __rhs); |
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basic_streambuf& operator=(const basic_streambuf& __rhs); |
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void swap(basic_streambuf& __rhs); |
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|
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// 27.6.2.3.2 Get area: |
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_LIBCPP_ALWAYS_INLINE char_type* eback() const {return __binp_;}
|
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_LIBCPP_ALWAYS_INLINE char_type* gptr() const {return __ninp_;}
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_LIBCPP_ALWAYS_INLINE char_type* egptr() const {return __einp_;}
|
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void gbump(int __n); |
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void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend); |
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|
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// 27.6.2.3.3 Put area: |
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_LIBCPP_ALWAYS_INLINE char_type* pbase() const {return __bout_;}
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_LIBCPP_ALWAYS_INLINE char_type* pptr() const {return __nout_;}
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_LIBCPP_ALWAYS_INLINE char_type* epptr() const {return __eout_;}
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void pbump(int __n); |
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void setp(char_type* __pbeg, char_type* __pend); |
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|
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// 27.6.2.4 virtual functions: |
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// 27.6.2.4.1 Locales: |
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virtual void imbue(const locale& __loc); |
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|
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// 27.6.2.4.2 Buffer management and positioning: |
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virtual basic_streambuf* setbuf(char_type* __s, streamsize __n); |
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virtual pos_type seekoff(off_type __off, ios_base::seekdir __way, |
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ios_base::openmode __which = ios_base::in | ios_base::out); |
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virtual pos_type seekpos(pos_type __sp, |
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ios_base::openmode __which = ios_base::in | ios_base::out); |
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virtual int sync(); |
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|
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// 27.6.2.4.3 Get area: |
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virtual streamsize showmanyc(); |
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virtual streamsize xsgetn(char_type* __s, streamsize __n); |
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virtual int_type underflow(); |
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virtual int_type uflow(); |
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|
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// 27.6.2.4.4 Putback: |
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virtual int_type pbackfail(int_type __c = traits_type::eof()); |
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|
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// 27.6.2.4.5 Put area: |
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virtual streamsize xsputn(const char_type* __s, streamsize __n); |
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virtual int_type overflow(int_type __c = traits_type::eof()); |
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|
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private: |
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locale __loc_; |
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char_type* __binp_; |
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char_type* __ninp_; |
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char_type* __einp_; |
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char_type* __bout_; |
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char_type* __nout_; |
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char_type* __eout_; |
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}; |
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|
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template <class _CharT, class _Traits> |
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basic_streambuf<_CharT, _Traits>::~basic_streambuf() |
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{
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} |
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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locale |
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basic_streambuf<_CharT, _Traits>::pubimbue(const locale& __loc) |
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{
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imbue(__loc); |
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locale __r = __loc_; |
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__loc_ = __loc; |
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return __r; |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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locale |
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basic_streambuf<_CharT, _Traits>::getloc() const |
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{
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return __loc_; |
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} |
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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basic_streambuf<_CharT, _Traits>* |
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basic_streambuf<_CharT, _Traits>::pubsetbuf(char_type* __s, streamsize __n) |
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{
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return setbuf(__s, __n); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::pos_type |
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basic_streambuf<_CharT, _Traits>::pubseekoff(off_type __off, |
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ios_base::seekdir __way, |
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ios_base::openmode __which) |
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{
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return seekoff(__off, __way, __which); |
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} |
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::pos_type |
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basic_streambuf<_CharT, _Traits>::pubseekpos(pos_type __sp, |
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ios_base::openmode __which) |
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{
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return seekpos(__sp, __which); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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int |
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basic_streambuf<_CharT, _Traits>::pubsync() |
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{
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return sync(); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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streamsize |
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basic_streambuf<_CharT, _Traits>::in_avail() |
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{
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if (__ninp_ < __einp_) |
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return static_cast<streamsize>(__einp_ - __ninp_); |
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return showmanyc(); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::int_type |
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basic_streambuf<_CharT, _Traits>::snextc() |
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{
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if (sbumpc() == traits_type::eof()) |
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return traits_type::eof(); |
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return sgetc(); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::int_type |
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basic_streambuf<_CharT, _Traits>::sbumpc() |
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{
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if (__ninp_ == __einp_) |
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return uflow(); |
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return traits_type::to_int_type(*__ninp_++); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::int_type |
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basic_streambuf<_CharT, _Traits>::sgetc() |
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{
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if (__ninp_ == __einp_) |
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return underflow(); |
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return traits_type::to_int_type(*__ninp_); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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streamsize |
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basic_streambuf<_CharT, _Traits>::sgetn(char_type* __s, streamsize __n) |
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{
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return xsgetn(__s, __n); |
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} |
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::int_type |
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basic_streambuf<_CharT, _Traits>::sputbackc(char_type __c) |
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{
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if (__binp_ == __ninp_ || !traits_type::eq(__c, __ninp_[-1])) |
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return pbackfail(traits_type::to_int_type(__c)); |
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return traits_type::to_int_type(*--__ninp_); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::int_type |
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basic_streambuf<_CharT, _Traits>::sungetc() |
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{
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if (__binp_ == __ninp_) |
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return pbackfail(); |
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return traits_type::to_int_type(*--__ninp_); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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typename basic_streambuf<_CharT, _Traits>::int_type |
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basic_streambuf<_CharT, _Traits>::sputc(char_type __c) |
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{
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if (__nout_ == __eout_) |
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return overflow(traits_type::to_int_type(__c)); |
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*__nout_++ = __c; |
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return traits_type::to_int_type(__c); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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streamsize |
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basic_streambuf<_CharT, _Traits>::sputn(const char_type* __s, streamsize __n) |
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{
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return xsputn(__s, __n); |
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} |
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|
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template <class _CharT, class _Traits> |
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basic_streambuf<_CharT, _Traits>::basic_streambuf() |
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: __binp_(0), |
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__ninp_(0), |
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__einp_(0), |
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__bout_(0), |
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__nout_(0), |
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__eout_(0) |
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{
|
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} |
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|
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template <class _CharT, class _Traits> |
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basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb) |
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: __loc_(__sb.__loc_), |
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__binp_(__sb.__binp_), |
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__ninp_(__sb.__ninp_), |
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__einp_(__sb.__einp_), |
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__bout_(__sb.__bout_), |
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__nout_(__sb.__nout_), |
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__eout_(__sb.__eout_) |
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{
|
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} |
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|
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template <class _CharT, class _Traits> |
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basic_streambuf<_CharT, _Traits>& |
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basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb) |
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{
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__loc_ = __sb.__loc_; |
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__binp_ = __sb.__binp_; |
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__ninp_ = __sb.__ninp_; |
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__einp_ = __sb.__einp_; |
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__bout_ = __sb.__bout_; |
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__nout_ = __sb.__nout_; |
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__eout_ = __sb.__eout_; |
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return *this; |
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} |
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|
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template <class _CharT, class _Traits> |
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void |
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basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb) |
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{
|
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_VSTD::swap(__loc_, __sb.__loc_); |
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_VSTD::swap(__binp_, __sb.__binp_); |
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_VSTD::swap(__ninp_, __sb.__ninp_); |
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_VSTD::swap(__einp_, __sb.__einp_); |
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_VSTD::swap(__bout_, __sb.__bout_); |
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_VSTD::swap(__nout_, __sb.__nout_); |
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_VSTD::swap(__eout_, __sb.__eout_); |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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void |
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basic_streambuf<_CharT, _Traits>::gbump(int __n) |
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{
|
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__ninp_ += __n; |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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void |
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basic_streambuf<_CharT, _Traits>::setg(char_type* __gbeg, char_type* __gnext, |
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char_type* __gend) |
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{
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__binp_ = __gbeg; |
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__ninp_ = __gnext; |
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__einp_ = __gend; |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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void |
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basic_streambuf<_CharT, _Traits>::pbump(int __n) |
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{
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__nout_ += __n; |
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} |
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|
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template <class _CharT, class _Traits> |
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inline _LIBCPP_INLINE_VISIBILITY |
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void |
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basic_streambuf<_CharT, _Traits>::setp(char_type* __pbeg, char_type* __pend) |
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{
|
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__bout_ = __nout_ = __pbeg; |
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__eout_ = __pend; |
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} |
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|
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template <class _CharT, class _Traits> |
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void |
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basic_streambuf<_CharT, _Traits>::imbue(const locale&) |
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{
|
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} |
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|
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template <class _CharT, class _Traits> |
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basic_streambuf<_CharT, _Traits>* |
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basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize) |
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{
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return this; |
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} |
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|
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template <class _CharT, class _Traits> |
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typename basic_streambuf<_CharT, _Traits>::pos_type |
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basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir, |
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ios_base::openmode) |
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{
|
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return pos_type(off_type(-1)); |
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} |
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|
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template <class _CharT, class _Traits> |
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typename basic_streambuf<_CharT, _Traits>::pos_type |
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basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode) |
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{
|
| 474 |
return pos_type(off_type(-1)); |
| 475 |
} |
| 476 |
|
| 477 |
template <class _CharT, class _Traits> |
| 478 |
int |
| 479 |
basic_streambuf<_CharT, _Traits>::sync() |
| 480 |
{
|
| 481 |
return 0; |
| 482 |
} |
| 483 |
|
| 484 |
template <class _CharT, class _Traits> |
| 485 |
streamsize |
| 486 |
basic_streambuf<_CharT, _Traits>::showmanyc() |
| 487 |
{
|
| 488 |
return 0; |
| 489 |
} |
| 490 |
|
| 491 |
template <class _CharT, class _Traits> |
| 492 |
streamsize |
| 493 |
basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n) |
| 494 |
{
|
| 495 |
const int_type __eof = traits_type::eof(); |
| 496 |
int_type __c; |
| 497 |
streamsize __i = 0; |
| 498 |
for (;__i < __n; ++__i, ++__s) |
| 499 |
{
|
| 500 |
if (__ninp_ < __einp_) |
| 501 |
*__s = *__ninp_++; |
| 502 |
else if ((__c = uflow()) != __eof) |
| 503 |
*__s = traits_type::to_char_type(__c); |
| 504 |
else |
| 505 |
break; |
| 506 |
} |
| 507 |
return __i; |
| 508 |
} |
| 509 |
|
| 510 |
template <class _CharT, class _Traits> |
| 511 |
typename basic_streambuf<_CharT, _Traits>::int_type |
| 512 |
basic_streambuf<_CharT, _Traits>::underflow() |
| 513 |
{
|
| 514 |
return traits_type::eof(); |
| 515 |
} |
| 516 |
|
| 517 |
template <class _CharT, class _Traits> |
| 518 |
typename basic_streambuf<_CharT, _Traits>::int_type |
| 519 |
basic_streambuf<_CharT, _Traits>::uflow() |
| 520 |
{
|
| 521 |
if (underflow() == traits_type::eof()) |
| 522 |
return traits_type::eof(); |
| 523 |
return traits_type::to_int_type(*__ninp_++); |
| 524 |
} |
| 525 |
|
| 526 |
template <class _CharT, class _Traits> |
| 527 |
typename basic_streambuf<_CharT, _Traits>::int_type |
| 528 |
basic_streambuf<_CharT, _Traits>::pbackfail(int_type) |
| 529 |
{
|
| 530 |
return traits_type::eof(); |
| 531 |
} |
| 532 |
|
| 533 |
template <class _CharT, class _Traits> |
| 534 |
streamsize |
| 535 |
basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n) |
| 536 |
{
|
| 537 |
streamsize __i = 0; |
| 538 |
int_type __eof = traits_type::eof(); |
| 539 |
while( __i < __n) |
| 540 |
{
|
| 541 |
if (__nout_ >= __eout_) |
| 542 |
{
|
| 543 |
if (overflow(traits_type::to_int_type(*__s)) == __eof) |
| 544 |
break; |
| 545 |
++__s; |
| 546 |
++__i; |
| 547 |
} |
| 548 |
else |
| 549 |
{
|
| 550 |
streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i); |
| 551 |
traits_type::copy(__nout_, __s, __chunk_size); |
| 552 |
__nout_ += __chunk_size; |
| 553 |
__s += __chunk_size; |
| 554 |
__i += __chunk_size; |
| 555 |
} |
| 556 |
} |
| 557 |
return __i; |
| 558 |
} |
| 559 |
|
| 560 |
template <class _CharT, class _Traits> |
| 561 |
typename basic_streambuf<_CharT, _Traits>::int_type |
| 562 |
basic_streambuf<_CharT, _Traits>::overflow(int_type) |
| 563 |
{
|
| 564 |
return traits_type::eof(); |
| 565 |
} |
| 566 |
|
| 567 |
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_streambuf<char>) |
| 568 |
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_streambuf<wchar_t>) |
| 569 |
|
| 570 |
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_ios<char>) |
| 571 |
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_TYPE_VIS basic_ios<wchar_t>) |
| 572 |
|
| 573 |
_LIBCPP_END_NAMESPACE_STD |
| 574 |
|
| 575 |
#endif // _LIBCPP_STEAMBUF |