[Boost-commit] svn:boost r42329 - branches/iostreams_dev/boost/iostreams/detail/config

From: technews_at_[hidden]
Date: 2007-12-29 01:38:59

Author: turkanis
Date: 2007-12-29 01:38:59 EST (Sat, 29 Dec 2007)
New Revision: 42329
URL: http://svn.boost.org/trac/boost/changeset/42329

Log:
improved use of glibc feature test macros; added support for ftruncate
Text files modified: 
   branches/iostreams_dev/boost/iostreams/detail/config/rtl.hpp |    17 +++++++++++------                       
   1 files changed, 11 insertions(+), 6 deletions(-)

Modified: branches/iostreams_dev/boost/iostreams/detail/config/rtl.hpp
==============================================================================
--- branches/iostreams_dev/boost/iostreams/detail/config/rtl.hpp	(original)
+++ branches/iostreams_dev/boost/iostreams/detail/config/rtl.hpp	2007-12-29 01:38:59 EST (Sat, 29 Dec 2007)
@@ -36,7 +36,7 @@
 #define BOOST_IOSTREAMS_FD_READ   BOOST_IOSTREAMS_RTL(read)
 #define BOOST_IOSTREAMS_FD_WRITE  BOOST_IOSTREAMS_RTL(write)
 
-// Handle lseek
+// Handle lseek and truncate
 #if defined(BOOST_IOSTREAMS_WINDOWS) && !defined(__CYGWIN__)
 # if defined(BOOST_MSVC) || defined(__MSVCRT__) // MSVC, MinGW
 #  define BOOST_IOSTREAMS_FD_SEEK    _lseeki64
@@ -46,12 +46,17 @@
 #  define BOOST_IOSTREAMS_FD_OFFSET  long
 # endif
 #else // Non-windows
-# if defined(_LARGEFILE64_SOURCE) || defined(BOOST_IOSTREAMS_HAS_LSEEK64)
-#  define BOOST_IOSTREAMS_FD_SEEK    lseek64  // GCC for some 32-bit *nix
-#  define BOOST_IOSTREAMS_FD_OFFSET  off64_t
+# if defined(_LARGEFILE64_SOURCE) && \
+         (!defined(_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64) || \
+     defined(BOOST_IOSTREAMS_HAS_LSEEK64) \
+     /**/
+#  define BOOST_IOSTREAMS_FD_SEEK      lseek64  // GCC for some 32-bit *nix
+#  define BOOST_IOSTREAMS_FD_TRUNCATE  ftruncate64
+#  define BOOST_IOSTREAMS_FD_OFFSET    off64_t
 # else                                        // Cygwin, Darwin, ...
-#  define BOOST_IOSTREAMS_FD_SEEK    lseek
-#  define BOOST_IOSTREAMS_FD_OFFSET  off_t
+#  define BOOST_IOSTREAMS_FD_SEEK      lseek
+#  define BOOST_IOSTREAMS_FD_TRUNCATE  ftruncate
+#  define BOOST_IOSTREAMS_FD_OFFSET    off_t
 # endif
 #endif