The Tor Browser: build/stlport/src/details/fstream_stdio.cpp@6474c204b198 (annotated)

build/stlport/src/details/fstream_stdio.cpp@6474c204b198 (annotated)

build/stlport/src/details/fstream_stdio.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * 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.
  *
  */
 #if defined  (__SUNPPRO_CC)  && !defined (_STLP_NO_NEW_C_HEADERS)
 #  include <time.h>
 // For sunpro, it chokes if time.h is included through stat.h
 #endif
 #include <fstream>
 #ifdef __CYGWIN__
 #  define __int64 long long
 #endif
 #include <cstdio>
 #if !defined(__ISCPP__)
 extern "C" {
 #  include <sys/stat.h>
 }
 #endif
 #if defined( __MSL__ )
 #  include <unix.h>
 #endif
 #if defined(__ISCPP__)
 #  include <c_locale_is/filestat.h>
 #endif
 #if defined(__BEOS__) && defined(__INTEL__)
 #  include <fcntl.h>
 #  include <sys/stat.h>         // For _fstat
 #endif
 #if defined (_STLP_MSVC) || defined (__MINGW32__)
 #  include <fcntl.h>
 #  define S_IREAD _S_IREAD
 #  define S_IWRITE _S_IWRITE
 #  define S_IFREG _S_IFREG
      // map permission masks
 #  ifndef S_IRUSR
 #    define S_IRUSR _S_IREAD
 #    define S_IWUSR _S_IWRITE
 #  endif
 #  ifndef S_IRGRP
 #    define S_IRGRP _S_IREAD
 #    define S_IWGRP _S_IWRITE
 #  endif
 #  ifndef S_IROTH
 #    define S_IROTH _S_IREAD
 #    define S_IWOTH _S_IWRITE
 #  endif
 #  ifndef O_RDONLY
 #    define O_RDONLY _O_RDONLY
 #    define O_WRONLY _O_WRONLY
 #    define O_RDWR   _O_RDWR
 #    define O_APPEND _O_APPEND
 #    define O_CREAT  _O_CREAT
 #    define O_TRUNC  _O_TRUNC
 #    define O_TEXT   _O_TEXT
 #    define O_BINARY _O_BINARY
 #  endif
 #  ifndef O_ACCMODE
 #    define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
 #  endif
 #endif
 const _STLP_fd INVALID_STLP_FD = -1;
 #  ifdef __MSL__
 #    define _O_TEXT 0x0
 #    if !defined( O_TEXT )
 #      define O_TEXT _O_TEXT
 #    endif
 #    define _S_IFREG S_IFREG
 #    define S_IREAD        S_IRUSR
 #    define S_IWRITE       S_IWUSR
 #    define S_IEXEC        S_IXUSR
 #    define _S_IWRITE S_IWRITE
 #    define _S_IREAD S_IREAD
 #    define _open open
 #    define _close close
 #    define _read read
 #    define _write write
 #  endif
 _STLP_BEGIN_NAMESPACE
 // Compare with streamoff definition in stl/char_traits.h!
 #if defined (_STLP_USE_DEFAULT_FILE_OFFSET) || \
     (!defined(_LARGEFILE_SOURCE) && !defined(_LARGEFILE64_SOURCE))
 #  define FOPEN fopen
 #  define FSEEK fseek
 #  define FSTAT fstat
 #  define STAT  stat
 #  define FTELL ftell
 #else
 #  define FOPEN fopen64
 #  define FSEEK fseeko64
 #  define FSTAT fstat64
 #  define STAT  stat64
 #  define FTELL ftello64
 #endif
 _STLP_MOVE_TO_PRIV_NAMESPACE
 // Helper functions for _Filebuf_base.
 static bool __is_regular_file(_STLP_fd fd) {
   struct STAT buf;
   return FSTAT(fd, &buf) == 0 && (buf.st_mode & S_IFREG) != 0 ;
 }
 // Number of characters in the file.
 static streamoff __file_size(_STLP_fd fd) {
   streamoff ret = 0;
   struct STAT buf;
   if (FSTAT(fd, &buf) == 0 && (buf.st_mode & S_IFREG) != 0)
     ret = buf.st_size > 0 ? buf.st_size : 0;
   return ret;
 }
 _STLP_MOVE_TO_STD_NAMESPACE
 // All version of Unix have mmap and lseek system calls.  Some also have
 // longer versions of those system calls to accommodate 64-bit offsets.
 // If we're on a Unix system, define some macros to encapsulate those
 // differences.
 size_t _Filebuf_base::_M_page_size = 4096;
 _Filebuf_base::_Filebuf_base()
   : _M_file_id(INVALID_STLP_FD),
     _M_openmode(0),
     _M_is_open(false),
     _M_should_close(false)
 {}
 void _Filebuf_base::_S_initialize()
 {
 }
 // Return the size of the file.  This is a wrapper for stat.
 // Returns zero if the size cannot be determined or is ill-defined.
 streamoff _Filebuf_base::_M_file_size()
 {
   return _STLP_PRIV __file_size(_M_file_id);
 }
 bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode,
                             long permission)
 {
   _STLP_fd file_no;
   if (_M_is_open)
     return false;
   // use FILE-based i/o
   const char* flags;
   switch (openmode & (~ios_base::ate)) {
     case ios_base::out:
     case ios_base::out | ios_base::trunc:
       flags = "w";
       break;
     case ios_base::out | ios_base::binary:
     case ios_base::out | ios_base::trunc | ios_base::binary:
       flags = "wb";
       break;
     case ios_base::out | ios_base::app:
       flags = "a";
       break;
     case ios_base::out | ios_base::app | ios_base::binary:
       flags = "ab";
       break;
     case ios_base::in:
       flags = "r";
       break;
     case ios_base::in | ios_base::binary:
       flags = "rb";
       break;
     case ios_base::in | ios_base::out:
       flags = "r+";
       break;
     case ios_base::in | ios_base::out | ios_base::binary:
       flags = "r+b";
       break;
     case ios_base::in | ios_base::out | ios_base::trunc:
       flags = "w+";
       break;
     case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
       flags = "w+b";
       break;
     default:                      // The above are the only combinations of
       return false;               // flags allowed by the C++ standard.
   }
   // fbp : TODO : set permissions !
   (void)permission; // currently unused    //*TY 02/26/2000 - added to suppress warning message
   _M_file = FOPEN(name, flags);
   if (_M_file) {
     file_no = fileno(_M_file);
   } else {
     return false;
   }
   // unset buffering immediately
   setbuf(_M_file, 0);
   _M_is_open = true;
   if (openmode & ios_base::ate) {
     if (FSEEK(_M_file, 0, SEEK_END) != 0)
       _M_is_open = false;
   }
   _M_file_id = file_no;
   _M_should_close = _M_is_open;
   _M_openmode = openmode;
   if (_M_is_open)
     _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id);
   return (_M_is_open != 0);
 }
 bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode)
 {
   // This doesn't really grant everyone in the world read/write
   // access.  On Unix, file-creation system calls always clear
   // bits that are set in the umask from the permissions flag.
   return this->_M_open(name, openmode, S_IRUSR | S_IWUSR | S_IRGRP |
                                        S_IWGRP | S_IROTH | S_IWOTH);
 }
 // Associated the filebuf with a file descriptor pointing to an already-
 // open file.  Mode is set to be consistent with the way that the file
 // was opened.
 bool _Filebuf_base::_M_open( int file_no, ios_base::openmode )
 {
   if (_M_is_open || file_no < 0)
     return false;
   struct STAT buf;
   if (FSTAT(file_no, &buf) != 0)
     return false;
   int mode = buf.st_mode;
   switch ( mode & (S_IWRITE | S_IREAD) ) {
     case S_IREAD:
       _M_openmode = ios_base::in;
       break;
     case S_IWRITE:
       _M_openmode = ios_base::out;
       break;
     case (S_IWRITE | S_IREAD):
       _M_openmode = ios_base::in | ios_base::out;
       break;
     default:
       return false;
   }
   _M_file_id = file_no;
   _M_is_open = true;
   _M_should_close = false;
   _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id);
   return true;
 }
 bool _Filebuf_base::_M_close()
 {
   if (!_M_is_open)
     return false;
   bool ok = _M_should_close ? (fclose(_M_file) == 0) : true;
   _M_is_open = _M_should_close = false;
   _M_openmode = 0;
   return ok;
 }
 // Read up to n characters into a buffer.  Return value is number of
 // characters read.
 ptrdiff_t _Filebuf_base::_M_read(char* buf, ptrdiff_t n) {
   return fread(buf, 1, n, _M_file);
 }
 // Write n characters from a buffer.  Return value: true if we managed
 // to write the entire buffer, false if we didn't.
 bool _Filebuf_base::_M_write(char* buf, ptrdiff_t n)
 {
   for (;;) {
     ptrdiff_t written = fwrite(buf, 1, n, _M_file);
     if (n == written) {
       return true;
     }
     if (written > 0 && written < n) {
       n -= written;
       buf += written;
     } else {
       return false;
     }
   }
 }
 // Wrapper for lseek or the like.
 streamoff _Filebuf_base::_M_seek(streamoff offset, ios_base::seekdir dir)
 {
   int whence;
   switch ( dir ) {
     case ios_base::beg:
       if (offset < 0 /* || offset > _M_file_size() */ )
         return streamoff(-1);
       whence = SEEK_SET;
       break;
     case ios_base::cur:
       whence = SEEK_CUR;
       break;
     case ios_base::end:
       if (/* offset > 0 || */  -offset > _M_file_size() )
         return streamoff(-1);
       whence = SEEK_END;
       break;
     default:
       return streamoff(-1);
   }
   if ( FSEEK(_M_file, offset, whence) == 0 ) {
     return FTELL(_M_file);
   }
   return streamoff(-1);
 }
 // Attempts to memory-map len bytes of the current file, starting
 // at position offset.  Precondition: offset is a multiple of the
 // page size.  Postcondition: return value is a null pointer if the
 // memory mapping failed.  Otherwise the return value is a pointer to
 // the memory-mapped file and the file position is set to offset.
 void *_Filebuf_base::_M_mmap(streamoff, streamoff )
 {
   return 0;
 }
 void _Filebuf_base::_M_unmap(void*, streamoff)
 {
   // precondition : there is a valid mapping at the moment
 }
 _STLP_END_NAMESPACE

The Tor Browser / annotate

build/stlport/src/details/fstream_stdio.cpp@6474c204b198 (annotated)

build/stlport/src/details/fstream_stdio.cpp