[boost] [Boost-bugs] [ boost-Bugs-1649025 ] BOOST_IOSTREAMS_HAS_LSEEK64 on Mac OS X

From: SourceForge.net (noreply_at_[hidden])
Date: 2007-01-31 11:35:45

Bugs item #1649025, was opened at 2007-01-31 16:35
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1649025&group_id=7586

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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Gareth Sylvester-Bradley (gmsb)
Assigned to: Nobody/Anonymous (nobody)
Summary: BOOST_IOSTREAMS_HAS_LSEEK64 on Mac OS X

Initial Comment:
Mac OS X has 64-bit file offsets but uses the standard lseek call rather than lseek64.

The following is one fix for file_descriptor::seek() but there's no doubt a better way...

Change lines 203 and 218 from:

  203 #ifndef BOOST_IOSTREAMS_HAS_LSEEK64
  204     if ( off > integer_traits<long>::const_max ||
  205          off < integer_traits<long>::const_min )
  206     {
  207         throw BOOST_IOSTREAMS_FAILURE("bad offset");
  208     }
  209 #endif
  210 
  211     stream_offset result =
  212         #ifdef BOOST_IOSTREAMS_HAS_LSEEK64
  213             lseek64
  214         #else
  215             lseek
  216         #endif
  217             ( pimpl_->fd_,
  218               #ifdef BOOST_IOSTREAMS_HAS_LSEEK64
  219                   off,
  220               #else
  221                   static_cast<long>(off),
  222               #endif
  223               way == BOOST_IOS::beg ?
  224                   SEEK_SET :
  225                       way == BOOST_IOS::cur ?
  226                           SEEK_CUR :
  227                           SEEK_END );

To:

  203 #if !defined(BOOST_IOSTREAMS_HAS_LSEEK64) && !defined(__MACH__)
  ...
  218               #if defined(BOOST_IOSTREAMS_HAS_LSEEK64) || defined(__MACH__)
  ...

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