1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/build/stlport/src/fstream.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,114 @@
1.4 +/*
1.5 + * Copyright (c) 1999
1.6 + * Silicon Graphics Computer Systems, Inc.
1.7 + *
1.8 + * Copyright (c) 1999
1.9 + * Boris Fomitchev
1.10 + *
1.11 + * This material is provided "as is", with absolutely no warranty expressed
1.12 + * or implied. Any use is at your own risk.
1.13 + *
1.14 + * Permission to use or copy this software for any purpose is hereby granted
1.15 + * without fee, provided the above notices are retained on all copies.
1.16 + * Permission to modify the code and to distribute modified code is granted,
1.17 + * provided the above notices are retained, and a notice that the code was
1.18 + * modified is included with the above copyright notice.
1.19 + *
1.20 + */
1.21 +
1.22 +#include "stlport_prefix.h"
1.23 +
1.24 +#ifdef _STLP_USE_UNIX_IO
1.25 +# include "details/fstream_unistd.cpp"
1.26 +#elif defined(_STLP_USE_STDIO_IO)
1.27 +# include "details/fstream_stdio.cpp"
1.28 +#elif defined(_STLP_USE_WIN32_IO)
1.29 +# include "details/fstream_win32io.cpp"
1.30 +#else
1.31 +# error "Can't recognize IO scheme to use"
1.32 +#endif
1.33 +
1.34 +_STLP_BEGIN_NAMESPACE
1.35 +
1.36 +// fbp : let us map 1 MB maximum, just be sure not to trash VM
1.37 +#define MMAP_CHUNK 0x100000L
1.38 +
1.39 +_Underflow< char, char_traits<char> >::int_type _STLP_CALL
1.40 +_Underflow< char, char_traits<char> >::_M_doit(basic_filebuf<char, char_traits<char> >* __this)
1.41 +{
1.42 + typedef char_traits<char> traits_type;
1.43 + typedef traits_type::int_type int_type;
1.44 +
1.45 + if (!__this->_M_in_input_mode) {
1.46 + if (!__this->_M_switch_to_input_mode())
1.47 + return traits_type::eof();
1.48 + }
1.49 + else if (__this->_M_in_putback_mode) {
1.50 + __this->_M_exit_putback_mode();
1.51 + if (__this->gptr() != __this->egptr()) {
1.52 + int_type __c = traits_type::to_int_type(*__this->gptr());
1.53 + return __c;
1.54 + }
1.55 + }
1.56 +
1.57 + // If it's a disk file, and if the internal and external character
1.58 + // sequences are guaranteed to be identical, then try to use memory
1.59 + // mapped I/O. Otherwise, revert to ordinary read.
1.60 + if (__this->_M_base.__regular_file()
1.61 + && __this->_M_always_noconv
1.62 + && __this->_M_base._M_in_binary_mode()) {
1.63 + // If we've mmapped part of the file already, then unmap it.
1.64 + if (__this->_M_mmap_base)
1.65 + __this->_M_base._M_unmap(__this->_M_mmap_base, __this->_M_mmap_len);
1.66 +
1.67 + // Determine the position where we start mapping. It has to be
1.68 + // a multiple of the page size.
1.69 + streamoff __cur = __this->_M_base._M_seek(0, ios_base::cur);
1.70 + streamoff __size = __this->_M_base._M_file_size();
1.71 + if (__size > 0 && __cur >= 0 && __cur < __size) {
1.72 + streamoff __offset = (__cur / __this->_M_base.__page_size()) * __this->_M_base.__page_size();
1.73 + streamoff __remainder = __cur - __offset;
1.74 +
1.75 + __this->_M_mmap_len = __size - __offset;
1.76 +
1.77 + if (__this->_M_mmap_len > MMAP_CHUNK)
1.78 + __this->_M_mmap_len = MMAP_CHUNK;
1.79 +
1.80 + if ((__this->_M_mmap_base = __this->_M_base._M_mmap(__offset, __this->_M_mmap_len)) != 0) {
1.81 + __this->setg(__STATIC_CAST(char*, __this->_M_mmap_base),
1.82 + __STATIC_CAST(char*, __this->_M_mmap_base) + __STATIC_CAST(ptrdiff_t, __remainder),
1.83 + __STATIC_CAST(char*, __this->_M_mmap_base) + __STATIC_CAST(ptrdiff_t, __this->_M_mmap_len));
1.84 + return traits_type::to_int_type(*__this->gptr());
1.85 + }
1.86 + else
1.87 + __this->_M_mmap_len = 0;
1.88 + }
1.89 + else {
1.90 + __this->_M_mmap_base = 0;
1.91 + __this->_M_mmap_len = 0;
1.92 + }
1.93 + }
1.94 +
1.95 + return __this->_M_underflow_aux();
1.96 +}
1.97 +
1.98 +//----------------------------------------------------------------------
1.99 +// Force instantiation of filebuf and fstream classes.
1.100 +#if !defined(_STLP_NO_FORCE_INSTANTIATE)
1.101 +
1.102 +template class basic_filebuf<char, char_traits<char> >;
1.103 +template class basic_ifstream<char, char_traits<char> >;
1.104 +template class basic_ofstream<char, char_traits<char> >;
1.105 +template class basic_fstream<char, char_traits<char> >;
1.106 +
1.107 +# if !defined (_STLP_NO_WCHAR_T)
1.108 +template class _Underflow<wchar_t, char_traits<wchar_t> >;
1.109 +template class basic_filebuf<wchar_t, char_traits<wchar_t> >;
1.110 +template class basic_ifstream<wchar_t, char_traits<wchar_t> >;
1.111 +template class basic_ofstream<wchar_t, char_traits<wchar_t> >;
1.112 +template class basic_fstream<wchar_t, char_traits<wchar_t> >;
1.113 +# endif /* _STLP_NO_WCHAR_T */
1.114 +
1.115 +#endif
1.116 +
1.117 +_STLP_END_NAMESPACE
