diff options
Diffstat (limited to 'src/fstream.cpp')
-rw-r--r-- | src/fstream.cpp | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/src/fstream.cpp b/src/fstream.cpp deleted file mode 100644 index 81543bb..0000000 --- a/src/fstream.cpp +++ /dev/null @@ -1,114 +0,0 @@ -/* - * Copyright (c) 1999 - * Silicon Graphics Computer Systems, Inc. - * - * Copyright (c) 1999 - * Boris Fomitchev - * - * This material is provided "as is", with absolutely no warranty expressed - * or implied. Any use is at your own risk. - * - * Permission to use or copy this software for any purpose is hereby granted - * without fee, provided the above notices are retained on all copies. - * Permission to modify the code and to distribute modified code is granted, - * provided the above notices are retained, and a notice that the code was - * modified is included with the above copyright notice. - * - */ - -#include "stlport_prefix.h" - -#ifdef _STLP_USE_UNIX_IO -# include "details/fstream_unistd.cpp" -#elif defined(_STLP_USE_STDIO_IO) -# include "details/fstream_stdio.cpp" -#elif defined(_STLP_USE_WIN32_IO) -# include "details/fstream_win32io.cpp" -#else -# error "Can't recognize IO scheme to use" -#endif - -_STLP_BEGIN_NAMESPACE - -// fbp : let us map 1 MB maximum, just be sure not to trash VM -#define MMAP_CHUNK 0x100000L - -_Underflow< char, char_traits<char> >::int_type _STLP_CALL -_Underflow< char, char_traits<char> >::_M_doit(basic_filebuf<char, char_traits<char> >* __this) -{ - typedef char_traits<char> traits_type; - typedef traits_type::int_type int_type; - - if (!__this->_M_in_input_mode) { - if (!__this->_M_switch_to_input_mode()) - return traits_type::eof(); - } - else if (__this->_M_in_putback_mode) { - __this->_M_exit_putback_mode(); - if (__this->gptr() != __this->egptr()) { - int_type __c = traits_type::to_int_type(*__this->gptr()); - return __c; - } - } - - // If it's a disk file, and if the internal and external character - // sequences are guaranteed to be identical, then try to use memory - // mapped I/O. Otherwise, revert to ordinary read. - if (__this->_M_base.__regular_file() - && __this->_M_always_noconv - && __this->_M_base._M_in_binary_mode()) { - // If we've mmapped part of the file already, then unmap it. - if (__this->_M_mmap_base) - __this->_M_base._M_unmap(__this->_M_mmap_base, __this->_M_mmap_len); - - // Determine the position where we start mapping. It has to be - // a multiple of the page size. - streamoff __cur = __this->_M_base._M_seek(0, ios_base::cur); - streamoff __size = __this->_M_base._M_file_size(); - if (__size > 0 && __cur >= 0 && __cur < __size) { - streamoff __offset = (__cur / __this->_M_base.__page_size()) * __this->_M_base.__page_size(); - streamoff __remainder = __cur - __offset; - - __this->_M_mmap_len = __size - __offset; - - if (__this->_M_mmap_len > MMAP_CHUNK) - __this->_M_mmap_len = MMAP_CHUNK; - - if ((__this->_M_mmap_base = __this->_M_base._M_mmap(__offset, __this->_M_mmap_len)) != 0) { - __this->setg(__STATIC_CAST(char*, __this->_M_mmap_base), - __STATIC_CAST(char*, __this->_M_mmap_base) + __STATIC_CAST(ptrdiff_t, __remainder), - __STATIC_CAST(char*, __this->_M_mmap_base) + __STATIC_CAST(ptrdiff_t, __this->_M_mmap_len)); - return traits_type::to_int_type(*__this->gptr()); - } - else - __this->_M_mmap_len = 0; - } - else { - __this->_M_mmap_base = 0; - __this->_M_mmap_len = 0; - } - } - - return __this->_M_underflow_aux(); -} - -//---------------------------------------------------------------------- -// Force instantiation of filebuf and fstream classes. -#if !defined(_STLP_NO_FORCE_INSTANTIATE) - -template class basic_filebuf<char, char_traits<char> >; -template class basic_ifstream<char, char_traits<char> >; -template class basic_ofstream<char, char_traits<char> >; -template class basic_fstream<char, char_traits<char> >; - -# if !defined (_STLP_NO_WCHAR_T) -template class _Underflow<wchar_t, char_traits<wchar_t> >; -template class basic_filebuf<wchar_t, char_traits<wchar_t> >; -template class basic_ifstream<wchar_t, char_traits<wchar_t> >; -template class basic_ofstream<wchar_t, char_traits<wchar_t> >; -template class basic_fstream<wchar_t, char_traits<wchar_t> >; -# endif /* _STLP_NO_WCHAR_T */ - -#endif - -_STLP_END_NAMESPACE |