basic_file_libio.h [plain text]
#ifndef _CPP_BASIC_FILE
#define _CPP_BASIC_FILE 1
#pragma GCC system_header
#include <bits/c++config.h>
#include <ios>
#include <libioP.h>
namespace std
{
template<typename _CharT>
struct __basic_file_base: public __c_file_type
{
virtual
~__basic_file_base() { };
virtual int
overflow(int __c = EOF) = 0;
virtual int
underflow() = 0;
virtual int
uflow() = 0;
virtual int
pbackfail(int __c) = 0;
virtual streamsize
xsputn(const _CharT* __s, streamsize __n) = 0;
virtual streamsize
xsgetn(_CharT* __s, streamsize __n) = 0;
virtual streamoff
seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode __mode = ios_base::in | ios_base::out) = 0;
virtual streamoff
seekpos(streamoff __pos,
ios_base::openmode __mode = ios_base::in | ios_base::out) = 0;
virtual streambuf*
setbuf(_CharT* __b, int __len) = 0;
virtual int
sync() = 0;
virtual int
doallocate() = 0;
virtual streamsize
sys_read(_CharT* __s, streamsize __n) = 0;
virtual streamsize
sys_write(const _CharT* __s, streamsize __n) = 0;
virtual streamoff
sys_seek(streamoff __off, ios_base::seekdir __way) = 0;
virtual int
sys_close() = 0;
virtual int
sys_stat(void* __v) = 0;
virtual int
showmanyc() = 0;
virtual void
imbue(void* __v) = 0;
};
template<typename _CharT>
class __basic_file: public __basic_file_base<_CharT>
{
# ifdef _GLIBCPP_USE_WCHAR_T
__c_wfile_type _M_wfile;
# endif
public:
__basic_file(__c_lock* __lock = 0);
void
_M_open_mode(ios_base::openmode __mode, int& __p_mode, int& __rw_mode,
char* __c_mode);
__basic_file*
open(const char* __name, ios_base::openmode __mode, int __prot = 0664);
__basic_file*
sys_open(__c_file_type* __file, ios_base::openmode __mode);
_CharT
sys_getc();
_CharT
sys_ungetc(_CharT);
__basic_file*
close();
bool
is_open();
int
fd();
virtual
~__basic_file();
virtual int
overflow(int __c = EOF);
virtual int
underflow();
virtual int
uflow();
virtual int
pbackfail(int __c);
virtual streamsize
xsputn(const _CharT* __s, streamsize __n);
virtual streamsize
xsgetn(_CharT* __s, streamsize __n);
virtual streamoff
seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode __mode = ios_base::in | ios_base::out);
virtual streamoff
seekpos(streamoff __pos,
ios_base::openmode __mode = ios_base::in | ios_base::out);
virtual streambuf*
setbuf(_CharT* __b, int __len);
virtual int
sync();
virtual int
doallocate();
virtual streamsize
sys_read(_CharT* __s, streamsize __n);
virtual streamsize
sys_write(const _CharT* __s, streamsize __n);
virtual streamoff
sys_seek(streamoff __off, ios_base::seekdir __way);
virtual int
sys_close();
virtual int
sys_stat(void* __v);
virtual int
showmanyc();
virtual void
imbue(void* __v);
};
template<>
__basic_file<char>::__basic_file(__c_lock* __lock);
template<>
int
__basic_file<char>::overflow(int __c);
template<>
int
__basic_file<char>::underflow();
template<>
int
__basic_file<char>::uflow();
template<>
int
__basic_file<char>::pbackfail(int __c);
template<>
streamsize
__basic_file<char>::xsputn(const char* __s, streamsize __n);
template<>
streamoff
__basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode __mode);
template<>
streamoff
__basic_file<char>::seekpos(streamoff __pos, ios_base::openmode __mode);
template<>
streambuf*
__basic_file<char>::setbuf(char* __b, int __len);
template<>
int
__basic_file<char>::sync();
template<>
int
__basic_file<char>::doallocate();
#ifdef _GLIBCPP_USE_WCHAR_T
template<>
__basic_file<wchar_t>::__basic_file(__c_lock* __lock);
template<>
int
__basic_file<wchar_t>::overflow(int __c);
template<>
int
__basic_file<wchar_t>::underflow();
template<>
int
__basic_file<wchar_t>::uflow();
template<>
int
__basic_file<wchar_t>::pbackfail(int __c);
template<>
streamsize
__basic_file<wchar_t>::xsputn(const wchar_t* __s, streamsize __n);
template<>
streamoff
__basic_file<wchar_t>::seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode __mode);
template<>
streamoff
__basic_file<wchar_t>::seekpos(streamoff __pos, ios_base::openmode __mode);
template<>
streambuf*
__basic_file<wchar_t>::setbuf(wchar_t* __b, int __len);
template<>
int
__basic_file<wchar_t>::sync();
template<>
int
__basic_file<wchar_t>::doallocate();
#endif
template<typename _CharT>
__basic_file<_CharT>::~__basic_file()
{ _IO_file_finish(this, 0); }
template<typename _CharT>
void
__basic_file<_CharT>::_M_open_mode(ios_base::openmode __mode,
int& __p_mode, int& __rw_mode,
char* )
{
#ifdef O_BINARY
bool __testb = __mode & ios_base::binary;
#endif
bool __testi = __mode & ios_base::in;
bool __testo = __mode & ios_base::out;
bool __testt = __mode & ios_base::trunc;
bool __testa = __mode & ios_base::app;
if (!__testi && __testo && !__testt && !__testa)
{
__p_mode = O_WRONLY | O_TRUNC | O_CREAT;
__rw_mode = _IO_NO_READS;
}
if (!__testi && __testo && !__testt && __testa)
{
__p_mode = O_WRONLY | O_APPEND | O_CREAT;
__rw_mode = _IO_NO_READS | _IO_IS_APPENDING;
}
if (!__testi && __testo && __testt && !__testa)
{
__p_mode = O_WRONLY | O_TRUNC | O_CREAT;
__rw_mode = _IO_NO_READS;
}
if (__testi && !__testo && !__testt && !__testa)
{
__p_mode = O_RDONLY;
__rw_mode = _IO_NO_WRITES;
}
if (__testi && __testo && !__testt && !__testa)
{
__p_mode = O_RDWR;
__rw_mode = 0;
}
if (__testi && __testo && __testt && !__testa)
{
__p_mode = O_RDWR | O_TRUNC | O_CREAT;
__rw_mode = 0;
}
#ifdef O_BINARY
if (__testb)
__p_mode |= O_BINARY;
#endif
}
template<typename _CharT>
__basic_file<_CharT>*
__basic_file<_CharT>::sys_open(__c_file_type* __f,
ios_base::openmode __mode)
{
__basic_file* __ret = NULL;
int __fd = fileno(__f);
int __p_mode = 0;
int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
char __c_mode[4];
_M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
if (!_IO_file_is_open(this))
{
_fileno = __fd;
_flags &= ~(_IO_NO_READS + _IO_NO_WRITES);
_flags |= _IO_DELETE_DONT_CLOSE;
_offset = _IO_pos_BAD;
int __mask = _IO_NO_READS + _IO_NO_WRITES + _IO_IS_APPENDING;
_IO_mask_flags(this, __rw_mode, __mask);
}
return __ret;
}
template<typename _CharT>
__basic_file<_CharT>*
__basic_file<_CharT>::open(const char* __name, ios_base::openmode __mode,
int __prot)
{
__basic_file* __ret = NULL;
int __p_mode = 0;
int __rw_mode = _IO_NO_READS + _IO_NO_WRITES;
char __c_mode[4];
_M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
if (!_IO_file_is_open(this))
{
__c_file_type* __f;
__f = _IO_file_open(this, __name, __p_mode, __prot, __rw_mode, 0);
__ret = __f ? this: NULL;
}
return __ret;
}
template<typename _CharT>
bool
__basic_file<_CharT>::is_open() { return _fileno >= 0; }
template<typename _CharT>
__basic_file<_CharT>*
__basic_file<_CharT>::close()
{
return _IO_file_close_it(this) ? static_cast<__basic_file*>(NULL) : this;
}
template<typename _CharT>
streamsize
__basic_file<_CharT>::xsgetn(_CharT* __s, streamsize __n)
{ return _IO_file_xsgetn(this, __s, __n); }
template<typename _CharT>
streamsize
__basic_file<_CharT>::sys_read(_CharT* __s, streamsize __n)
{ return _IO_file_read(this, __s, __n); }
template<typename _CharT>
streamsize
__basic_file<_CharT>::sys_write(const _CharT* __s, streamsize __n)
{ return _IO_file_write(this, __s, __n); }
template<typename _CharT>
streamoff
__basic_file<_CharT>::sys_seek(streamoff __pos, ios_base::seekdir __way)
{ return _IO_file_seek(this, __pos, __way); }
template<typename _CharT>
int
__basic_file<_CharT>::sys_close()
{ return _IO_file_close(this); }
template<typename _CharT>
int
__basic_file<_CharT>::sys_stat(void* __v)
{ return _IO_file_stat(this, __v); }
template<typename _CharT>
int
__basic_file<_CharT>::showmanyc() { return EOF; }
template<typename _CharT>
void
__basic_file<_CharT>::imbue(void* ) { }
}
#endif // _CPP_BASIC_FILE